JP2016050917A - Partial load extension measurement device, twisting machine and winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure partial load extension of a cord, in in-line without cutting-out work of a cord sample.SOLUTION: A partial load extension measurement device 1 comprises: at least one movable sheave 5 which passes a cord 2 and can move in at least any direction; grip means 6, 7 capable of gripping both ends of a cord part 2a including a part which is passed to the movable sheave, in a state that the cord is passed the movable sheave; cord tension measurement means 8 capable of measuring tension of the cord part in a state that both ends of the cord part are gripped by the grip means; sheave drive means 15 for moving the movable sheave; cord length measurement means 14 capable of measuring length of the cord part; and calculation means 13 for calculating elongation of partial load extension of the cord, based on the respective length of the cord part measured by the cord length measurement means, under plural different tensions of the cord part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a partial load elongation measuring device, a stranded wire machine, and a winder.

Steel cords used for reinforcing rubber parts such as tires are used by being included in elastomers such as rubber. In this case, it is important that the elastomer sufficiently penetrates into the fine gaps in the steel cord. Steel cords with small gaps may cause insufficient penetration of the elastomer, making it easier for water components to enter the gaps in the steel cords, and the intruding water components to move along the steel cords in the rubber. May corrode or reduce the life of rubber products. Moreover, when a steel cord with many gaps is used, the effect of reinforcing the rubber strength may be insufficient.
Therefore, the gap of the steel cord is managed by an index known as partial load elongation (PLE), and the partial load elongation is a required quality at the time of product shipment (for example, Patent Document 1). .
The partial load elongation is measured by taking a part of a steel cord twisted by a twisting machine and using a tensile tester or the like provided at a place different from the place where the twisting machine is provided. It is common to measure a sample manually. Such a method of taking a cord sample and measuring it at a place different from the place where the twisting machine is provided requires a measurement time, and therefore further improvement is desired from the viewpoint of manufacturing efficiency. It is desired to automate or save labor in quality measurement.

Japanese Patent No. 3523909

  The present invention provides a partial load elongation measuring device that can measure a partial load elongation of a cord in-line without the need to cut out a cord sample, and a cord filament twist and a cord partial load elongation by including the partial load elongation measuring device. A winding machine capable of automatically performing inline measurement, and a winder capable of automatically performing inline winding and cord partial load elongation measurement by providing the partial load elongation measuring device. The purpose is to provide.

The partial load elongation measuring device of the present invention is a partial load elongation measuring device for measuring partial load elongation of a cord composed of one or a plurality of filaments,
At least one movable sheave that passes through the cord and is movable in at least one direction;
A gripping means capable of gripping both ends of a cord portion including a portion threaded to the movable sheave in a state where the cord is threaded to the movable sheave;
A cord tension measuring means capable of measuring the tension of the cord portion in a state where both ends of the cord portion are gripped by the gripping means;
Sheave drive means for moving the movable sheave;
A cord length measuring means capable of measuring the length of the cord portion;
Computing means for calculating a partial load elongation of the cord based on the length of the cord portion respectively measured by the cord length measuring means under a plurality of different tensions of the cord portion;
It is characterized by providing.
According to the partial load elongation measuring apparatus of the present invention, the partial load elongation can be measured in-line without the need to cut out the code sample.

  The partial load elongation measuring device according to the present invention includes at least three sheaves that pass through the cord in a U-shape, and the movable sheave is disposed at the center lower portion of the at least three sheaves. It is preferable that According to this configuration, it is not necessary to cut out the code sample, and the partial load elongation can be measured inline.

The partial load elongation measuring device of the present invention is a partial load elongation measuring device capable of further measuring the residual torsion of the cord,
A rotation angle measuring means capable of measuring a rotation angle about an axis passing through a vertical diameter of the central lower sheave;
The calculation means can further calculate a residual torsion of the code based on the rotation angle measured by the rotation angle measurement means,
The gripping means preferably grips both ends of the cord portion when measuring the residual torsion. According to this configuration, it is not necessary to cut out the code sample, and both residual torsion and partial load elongation can be measured in-line.

  The partial load elongation measuring device of the present invention preferably further comprises a display means capable of displaying a value measured by the cord length measuring means and / or the rotation angle measuring means. According to this configuration, both the residual torsion and the partial load elongation can be saved and measured.

  It is preferable that the partial load elongation measuring device of the present invention can simultaneously perform the measurement of the residual torsion and the measurement of the partial load elongation. According to this configuration, the time required for measuring the code can be shortened and the manufacturing efficiency can be improved.

  The partial load elongation measuring device of the present invention preferably further comprises tension adjusting means capable of adjusting the tension of the cord portion. According to this configuration, it is possible to measure the partial load elongation while saving labor.

The twisting machine of the present invention is a twisting machine provided with the partial load elongation measuring device, wherein the measurement of the partial load elongation is automatically performed after twisting the filament of the cord. .
According to the stranding machine of the present invention, the twist of the filament of the cord and the measurement of the partial load elongation can be automatically performed in-line.

The winding machine of the present invention is a winding machine provided with the partial load elongation measuring device, wherein the measurement of the partial load elongation is automatically performed after winding of the cord.
According to the winding machine of the present invention, the winding of the cord and the measurement of the partial load elongation can be automatically executed in-line.

  According to the present invention, there is provided a partial load elongation measuring device capable of measuring a partial load elongation in-line without the need to cut out a cord sample, and by providing the partial load elongation measuring device, the twist of the filament of the cord and the partial load elongation of the cord A winding machine capable of automatically performing inline measurement, and a winder capable of automatically performing inline winding and cord partial load elongation measurement by providing the partial load elongation measuring device. Can be provided.

It is a front view which shows the partial load elongation measuring apparatus which concerns on one Embodiment of this invention. 1 is a front view (FIG. 2A) and a side view (FIG. 2) showing the central lower sheave, the fixing means, the sheave driving means, the cord length measuring means, and the rotation angle measuring means in the partial load elongation measuring apparatus of FIG. B) to FIG. 2 (D)). 3 (A) to 3 (C) are enlarged perspective views showing the fixing means in FIGS. 2 (B) to 2 (D), respectively. It is a top view which shows the state which installed the partial load elongation measuring apparatus which concerns on one Embodiment of this invention in the strand wire machine. It is a top view which shows the state which installed the partial load elongation measuring apparatus which concerns on one Embodiment of this invention in the winding machine. It is a figure for demonstrating the relationship between the tension | tensile_strength of a code part, and the length of a code part.

  The form for implementing this invention is illustrated below.

(Partial load elongation measuring device)
The partial load elongation measuring device according to the present invention includes at least one movable sheave having a cord passing therethrough, a gripping means, a cord tension measuring means, a sheave driving means, a cord length measuring means, and a computing means. In addition, other means are provided as necessary.
The cord is not particularly limited as long as it is composed of one or a plurality of filaments, and can be appropriately selected according to the purpose. Examples thereof include a stranded wire.

<Movable sheave>
The movable sheave is a sheave that passes through the cord and is not particularly limited as long as it is movable in at least one direction, and can be appropriately selected according to the purpose. In a partial load elongation measuring device having at least three sheaves that pass through, a central lower sheave fixed at least two sheaves and movably disposed under the two sheaves, and the like.
The direction in which the movable sheave can be moved is not particularly limited and may be appropriately selected depending on the purpose.For example, any direction such as a vertical direction (horizontal direction), a horizontal direction, and an oblique direction may be used. In the partial load elongation measuring device, the vertical direction is preferable in that the structural design of the measuring device is simplified when the residual torsion measurement is performed in combination.

<Gripping means>
The gripping means is means for gripping both ends of a cord portion including a portion threaded through the movable sheave while the cord is threaded through the movable sheave. The gripping means grips both ends of the cord portion to which a predetermined tensile force is to be applied when a predetermined tensile force (tension) is applied to the cord portion of the cord that is connected to the movable sheave. This is a means for preventing the displacement of the connected cord.
The gripping means can put the wire cord in a gripping state or a release state as necessary. When performing partial load elongation measurement or residual torsion measurement, the grip means grips both ends of the cord portion so that the cord does not move in the direction of the line, and when not measuring these, the cord is It is preferable to release from the gripping state.
For example, as shown in FIG. 1, two upper sheaves 3 and 4 are fixed in a partial load elongation measuring device 1 including three sheaves 3, 4, and 5 that pass through a cord 2 in a U shape, and the two sheaves are fixed. When the central lower sheave 5 is movably disposed below the upper sheaves 3, 4, the gripping members 6, 7 as the gripping means are disposed at positions that sandwich the three sheaves 3, 4, 5. be able to. As a result, the gripping means grips both ends of the cord member including the portion threaded through the three sheaves 3, 4, 5 in a state where the cord 2 is threaded through the three sheaves 3, 4, 5. be able to.
Further, the gripping members 6 and 7 may be arranged at positions that sandwich only the central lower sheave 5.

<Cord tension measuring means>
The cord tension measuring means is means capable of measuring the tension of the cord portion in a state where both ends of the cord portion are gripped by the gripping means. In measuring the partial load elongation, the cord tension measuring means measures the elongation of the cord while applying a predetermined tensile force to the cord portion passing through the movable sheave.
The cord tension measuring means measures the tension at the cord portion gripped at both ends by the gripping means (at the position of the cord portion 2a gripped at both ends by the gripping members 6, 7 as shown in FIG. The cord tension measuring member 8 is preferably arranged between the member 6 and the gripping member 7).

<Sheave driving means>
The sheave drive means is means that can move the movable sheave. In the measurement of partial load elongation, the tension of the cord portion can be freely adjusted by moving the movable sheave while the both ends of the cord portion passing through the movable sheave are gripped by the gripping means. That is, the sheave driving means is means for adjusting the tension by moving the movable sheave.
The sheave driving means may be configured to move directly to the movable sheave and move the movable sheave. Alternatively, as shown in FIG. 2, the sheave driving means may be configured as an air cylinder 15 that drives a fixed block 16 as a fixing means. (Center lower sheave 5) may be moved. The sheave driving means can move the central lower sheave 5 in the vertical direction by driving the fixed block 16 in the vertical direction.

<Fixing means>
The fixing means is a means capable of restricting the vertical movement of the central lower sheave and the rotation around the axis passing through the vertical diameter of the central lower sheave.
As shown in FIGS. 2B and 3A, the fixing block 16 as the fixing means regulates the vertical direction and the rotation angle of the fixing shaft 10 installed in the central lower sheave 5. As shown in FIGS. 2B to 2D, the fixed block 16 can be moved in the vertical direction in conjunction with the air cylinder 15 as the sheave driving means.
Preferably, the fixing means does not apply the restriction to the central lower sheave when measuring the residual torsion.

<Cord length measuring means>
The cord length measuring means is a means capable of measuring the length of the cord portion. In measuring the partial load elongation, the cord length measuring means measures the elongation of the cord while applying a predetermined tensile force to the cord portion passing through the movable sheave.
Examples of the cord length measuring means include means for directly measuring the length of the cord. Further, as shown in FIG. 2, the cord length is indirectly measured by measuring the position of the movable sheave (the center lower sheave 5) passing through the cord 2a with the cord length measuring member 14. It may be a means. In such a case, the “code length measuring unit” is based on, for example, a movable sheave movement amount measuring unit that can measure the movement amount of the movable sheave, and a movement amount of the movable sheave measured by the movable sheave movement amount measurement unit. Code length calculation means capable of calculating the code length after movement.

<Calculation means>
The computing means is means for calculating a partial load elongation of the cord based on the length of the cord portion respectively measured by the cord length measuring means under a plurality of different tensions of the cord portion.
FIG. 6 shows a plot in which the tension (N) applied to the cord portion is plotted on the vertical axis and the length of the cord portion is plotted on the horizontal axis. Generally, when the tension applied to the cord portion increases, The length of is in a relationship of becoming longer.
In calculating the partial load elongation of the cord, for example, the length of the cord portion is measured under three different tensions, and a predetermined calculation formula ( The partial load elongation is calculated using the following formula (I)). More specifically, in the example of FIG. 6, the length of the code portion at 0.0N (Newton) (point A in FIG. 6; hereinafter referred to as “L0”) and any 2 exceeding 0N The respective cord lengths (points B and C in FIG. 6, respectively, hereinafter referred to as “L1” and “L2”, respectively) at two different tensions (N) are measured. However, L2> L1. For example, when any two tensions exceeding 0N are set to 2.5N and 50N, the length of the cord portion when the tension is 2.5N is L1, and the length of the cord portion when the tension is 50N is L2.
From the L0, L1, and L2, the partial load elongation (PLE) can be calculated using the following arithmetic expression (I).
[Equation 1]
Partial load elongation (PLE) (%) = (L2 / L0−L1 / L0) × 100 (I)
In the above example, the lengths L0, L1, and L2 of the cord portions are obtained using three different tension values 0.0N, 2.5N, and 50N, respectively. However, any other three tension values are used. The lengths L0, L1, and L2 of the code portion may be obtained.

<Measurement of residual torsion>
The partial load elongation measuring device of the present invention may be configured to further measure the residual torsion of the cord portion by measuring a rotation angle around an axis passing through a vertical diameter of the central lower sheave. In this case, for example, the central lower sheave is suspended on the cord portion without receiving any action from the fixing means, and the computing means calculates the residual torsion of the cord based on the rotation angle.
The measurement of the residual torsion may be performed separately from the measurement of the partial load elongation in the partial load elongation measuring device of the present invention, or may be performed simultaneously. If the partial load elongation and the residual torsion measurement are performed simultaneously, it is advantageous in that the time required for the cord measurement can be shortened and the production efficiency can be improved.

<Rotation angle measuring means>
As shown in FIGS. 2 (C) and 3 (B), when the central lower sheave 5 is released from the contact by the fixed block 16, the central lower sheave 5 is changed according to the residual torsion of the cord 2. It can rotate around an axis that passes through the diameter in the vertical direction. The rotation angle measuring means is a means for measuring a rotation angle due to rotation of the central lower sheave.
The rotation angle of the center lower sheave can be measured, for example, by installing a detection panel with an angle memory attached to the center lower sheave and reading the memory by the rotation angle measuring means. is there.
The rotation angle measurement means and the cord length measurement means may be executed using a common measuring device, or a member for the rotation angle measurement means, and a member for the cord length measurement means May be configured separately.

<Other means>
There is no restriction | limiting in particular as another means with which the partial load elongation measuring apparatus of this invention is equipped, According to the objective, it can select suitably, For example, a tension adjustment means, a display means, etc. are mentioned.

<< Tension adjusting means >>
The tension adjusting means is a means capable of adjusting the tension of the cord portion. As described above, the tension of the cord portion can be adjusted by moving the movable sheave by the sheave driving means. However, since the movement of the movable sheave alone may not reach a desired load, By providing, the tension of the cord can be adjusted.
As shown in FIG. 1, the tension adjusting member 9 as the tension adjusting means is outside the cord portion 2 a between the gripping members 6, 7 (that is, upstream from the upstream gripping member 6 and / or It is preferably arranged at a position downstream of the gripping member 7 on the downstream side. In the example of FIG. 1, the tension adjusting member 9 is arranged on the downstream side of the downstream gripping member 7, the gripping member 7 in the vicinity of the tension adjusting member 9 is released, and the far gripping member 6 is moved. When the cord is wound with the tension adjusting member 9 in the gripping state, the tension of the cord portion 2a can be increased.

<< Display means >>
The display means is means capable of displaying a value measured by the cord length measurement means and / or the rotation angle measurement means.

(Stranded wire machine)
The stranding machine of this invention is a stranding machine provided with the said partial load elongation measuring apparatus, Comprising: The measurement of the said partial load elongation is automatically performed after the twist of the filament of the said cord.
According to the stranding machine of the present invention, the twist of the filament of the cord and the measurement of the partial load elongation can be automatically performed in-line.
Since partial load elongation measurement is automatically performed after twisting the filament of the cord, efficient partial load elongation measurement is possible.

(Winding machine)
The winder according to the present invention is a winder provided with the partial load elongation measuring device, and the measurement of the partial load elongation is automatically executed after winding the cord.
According to the winding machine of the present invention, the winding of the cord and the measurement of the partial load elongation can be automatically executed in-line.
By measuring the partial load elongation automatically after winding the stranded wire, it is possible to efficiently measure the partial load elongation.

Hereinafter, a preferred embodiment of a partial load elongation measuring device of the present invention will be described in detail with reference to the drawings.
In FIG. 1, the front view which shows the partial load elongation measuring apparatus which concerns on one Embodiment of this invention is shown. The partial load elongation measuring device 1 according to the present invention is a device for measuring the partial load elongation of a cord 2, and includes at least three sheaves 3, 4, 5, which connect the cord 2 in a substantially U shape. In this example, three sheaves 3, 4, 5 including two upper sheaves 3, 4 and a central lower sheave 5 as a movable sheave disposed at the center lower portion are provided. Here, the “center lower sheave” is located between the upper sheave 3 on the upstream side and the upper sheave 4 on the downstream side in the extending direction of the cord 2 and below the upper sheaves 3 and 4. In some cases, a plurality of sheaves are provided.

  FIG. 2 (A) is a front view showing the central lower sheave 5 and its peripheral components in the partial load elongation measuring device 1, and FIGS. 2 (B) to 2 (D) are side views thereof. 3 (A) to 3 (C) are enlarged views of main parts of FIGS. 2 (B) to 2 (D), respectively. As shown in FIGS. 1 to 3, the central lower sheave 5 is provided at a lower portion thereof and extends in the vertical direction, and extends in a direction perpendicular to the shaft 17 (and thus in a horizontal direction). A fixed shaft 10 that is fixed to the shaft 17, and a rotation angle detection panel 11 that is provided below the fixed shaft 10 and is provided around the shaft 17. The partial load elongation measuring device 1 is capable of fixing the central lower sheave 5 by restricting the vertical movement of the central lower sheave 5 and the rotation around the axis passing through the vertical diameter of the central lower sheave 5. A fixed block 16 is further provided. As shown in FIGS. 2 (B) to 2 (D), the fixed block 16 is provided around the shaft 17 of the central lower sheave 5 and is linked to the air cylinder 15 as sheave driving means. 17 is movable up and down. 2 (B) to 2 (D) (as a result, FIGS. 3 (A) to 3 (C)), the fixed blocks 16 are in different vertical positions.

As shown in FIG. 3A, a shaft 17 passes through a fixed block hole 18 extending in the vertical direction in the fixed block 16. The diameter of the fixed block hole 18 is larger than the diameter of the shaft 17 so that the inner peripheral surface of the fixed block hole 18 does not contact the outer peripheral surface of the shaft 17. Further, a cutout 16a extending from the bottom surface of the fixed block 16 to the front of the top surface is formed on any one side wall of the fixed block 16 so that the fixed shaft 10 is fixed to the fixed block 16. It is possible to penetrate through the notch 16a. The lower portion of the notch 16a has a constant width, but its upper portion is tapered in an inverted V shape.
When the center lower sheave 5 is fixed, as shown in FIG. 3A, the fixed shaft 10 engages with the inverted V-shaped portion of the notch 16a from below. Thus, the central lower sheave 5 is regulated so as to keep a predetermined distance from the upper sheaves 3 and 4 constant and not to rotate around an axis passing through the vertical diameter of the central lower sheave 5. It plays a role of fixing the sheave 5. Further, as shown in FIG. 3B, when the fixed block 16 is sufficiently raised and the engagement state between the fixed shaft 10 and the inverted V-shaped portion of the notch 16a of the fixed block 16 is released, The central lower sheave 5 can be rotated around the above axis. At this time, too, as shown by the broken line in FIG. It is supposed not to. Further, as shown in FIG. 3C, when the fixed block 16 continues to rise, the upper surface 19 of the fixed block comes into contact with the lower portion of the central lower sheave 5. By such contact, the central lower sheave 5 is pushed up as the fixed block 16 is raised.
As shown in FIG. 2 (B) (FIG. 3 (A)), the fixed block 16 is initially in the lowest position when the partial load elongation measurement is started. While maintaining a constant distance from the sheave 5, the center lower sheave 5 serves to fix the shaft so that it does not rotate around an axis passing through the diameter in the vertical direction. Thereafter, as shown in FIG. 2C (FIG. 3B) and FIG. 2D (FIG. 3C), the air cylinder 15 is raised by the action of the center lower sheave 5 from the fixed state. Open.

  Hereinafter, partial load elongation measurement and residual torsion measurement by the partial load elongation measurement device of the present invention will be described in detail with reference to the drawings.

(Partial load elongation measurement)
In this example, the partial load elongation is determined under the three different tensions of the cord portion 2a in a state where the cord portion 2a including the portion that is connected to the central lower sheave 5 is gripped at both ends by the gripping members 6 and 7. The length of the portion 2a is measured, and the length is calculated based on the measured values of the length of the cord portion 2a.

First, in the partial load elongation measuring device 1, the air cylinder 15 is driven to lower the fixed block 16 and bring the central lower sheave 5 to the lowest position (FIG. 2B). Next, the cord 2 connected in a U-shape is gripped by the upstream gripping member 6 (FIG. 1). In a state where the cord 2 is gripped by the upstream gripping member 6, the cord 2 is wound up by the tension adjusting member 9 and a tensile force is applied to the cord 2. The tension applied to the cord 2 can be measured by the cord tension measuring member 8.
After confirming that 50 N tension is applied to the cord 2 by the cord tension measuring member 8, the cord 2 is gripped at two locations by the upstream and downstream gripping members 6 and 7. Hereinafter, the portion of the cord 2 gripped at both ends by the gripping members 6 and 7 is simply referred to as “cord portion 2a”. By securely gripping both ends of the cord portion 2a with the gripping members 6 and 7, the displacement of the cord 2 can be prevented. At this time, since the tension is applied to the cord portion 2a, the center lower sheave 5 is loaded with a force to move upward by the tension of the cord portion 2a that passes through, but the fixed block 16 is fixed. The lowering of the central lower sheave 5 is maintained in a state where the shaft 10 is prevented from rising.

  In this state, the cord length measuring member 14 detects the vertical position of the central lower sheave 5 when the tension on the cord portion 2a is 50N. At this time, the length of the code portion 2a is L2, and the data is taken into the calculation member 13.

  Next, the air cylinder 15 is driven to raise the fixed block 16 gradually. When the fixed block 16 is raised, the fixed shaft 10 is raised while maintaining the engaged state with the notch 16a of the fixed block 16, and the central lower sheave 5 is also raised in conjunction with the rise of the fixed shaft 10. When the central lower sheave 5 is raised, the tension applied to the cord portion 2a is gradually relaxed. When the tension of the cord portion 2a reaches 2.5N by the cord tension measuring member 8, the driving of the air cylinder 15 is stopped and the rising of the fixed block 16 is stopped.

  The cord length measuring member 14 detects the vertical position of the central lower sheave 5 when the tension on the cord portion 2a is 2.5N. At this time, the length of the code portion 2a is L1, and data is taken into the calculation member 13.

  Again, the air cylinder 15 is driven to raise the fixed block 16 gradually. As a result, when the central lower sheave 5 is gradually raised, the tension of the cord portion 2a is sufficiently relaxed, and the gravity of the central lower sheave 5 and the tension of the cord portion 2a are suspended. There is a moment when the movement disappears.

With this moment as a boundary, the fixed shaft 10 is disengaged from the inverted V-shaped portion of the notch 16a of the fixed block 16, and is centered as shown in FIGS. 2 (C) and 3 (B). The lower sheave 5 is suspended on the cord portion 2a in substantially non-contact with the fixed block 16 (that is, without receiving any action from the fixed block 16).
In such a state, since the central lower sheave 5 is separated from the fixed block 16, as shown by a broken line in FIG. 3B, the rotation around the axis passing through the diameter in the vertical direction of the central lower sheave 5 becomes free. . Therefore, in this state, the residual torsion measurement described later can be particularly suitably performed.

  When the air cylinder 15 is continuously driven to raise the fixed block 16, the upper surface 19 of the fixed block comes into contact with the lower portion of the central lower sheave 5, and the state shown in FIGS. 2 (D) and 3 (C) is obtained. In such a state, the central lower sheave 5 is pushed up directly by an upward force from the fixed block upper surface 19. While monitoring the tension with the cord tension measuring member 8, when the tension becomes 0.0 N, the driving of the air cylinder 15 is stopped and the fixed block 16 is prevented from rising.

  The cord length measuring member 14 detects the vertical position of the central lower sheave 5 when the tension on the cord portion 2a is 0.0N. At this time, the length of the code portion 2a is L0, and the data is taken into the calculation member 13.

  In the calculation member 13, the partial load elongation (PLE) is calculated by the above-described calculation formula (I) from the measurement results of L0, L1, and L2 obtained by the above measurement. The obtained value can be displayed by the display member.

  Note that the partial load elongation measuring device 1 of the present embodiment is not necessarily configured to be able to measure residual torsion.

(Residual torsion measurement)
In the partial load elongation measuring device 1 of this example, the residual torsion of the cord 2 can be measured by measuring the rotation angle around the axis passing through the diameter in the vertical (vertical) direction of the central lower sheave 5. Both ends of the cord portion 2a are gripped by the gripping members 6 and 7, and the central lower sheave 5 and the fixed shaft 10 are separated from the fixed block 16 (that is, without receiving any action from the fixed block 16). (C) As shown in FIG. 3B, the rotation angle is measured in a state where the central lower sheave 5 is suspended on the cord portion 2a substantially in non-contact with the fixed block 16.

  In the example of the partial load elongation measurement described above, when the fixed block 16 is raised from the lowest position, the relationship between the fixed block 16 and the fixed shaft 10 changes from the engaged state of FIG. 2B to FIG. ) In the disengaged state (from the engaged state in FIG. 3A to the disengaged state in FIG. 3B). That is, the fixed block 16 and the fixed shaft 10 (and thus the central lower sheave 5) are brought into a non-contact state. In the state of FIG. 2C (FIG. 3B), the central lower sheave 5 can freely rotate around an axis passing through the diameter of the central lower sheave 5 in the vertical (vertical) direction.

  When residual torsion is present in the cord 2, the central lower sheave 5 away from the fixed block 16 repeats clockwise and counterclockwise rotation around an axis that passes through the diameter of the central lower sheave 5 in the vertical direction. Twist to converge at a predetermined angular position.

  For example, as shown in FIG. 1, the rotation angle of the center lower sheave 5 is detected as a rotation angle detection panel 11 installed below the center lower sheave 5 and rotation as a rotation angle measuring means for reading the angle. The residual torsion value can be obtained by taking the signal transmitted from the rotation angle measuring member 12 into the calculating member 13 and calculating it, and the obtained value can be obtained by the display member ( (Not shown).

  The rotation angle detection board 11 is installed in the center lower sheave 5 and rotates in conjunction with the rotation of the center lower sheave 5. The rotation angle detection board 11 includes a pattern (scale) on the outer peripheral surface of the rotation angle detection board 11 so that the rotation angle measurement member 12 can detect the rotation angle.

(Stranding machine, winding machine)
Although the partial load elongation measuring apparatus of the present invention can be used alone, it can also be used by installing it in a twisted wire machine 21 as shown in FIG. 4 or a twisted wire winder 23 as shown in FIG. . In this case, the partial load elongation can be measured efficiently by automatically measuring the partial load elongation after the operation of the twisting machine 21 or the winder 23 is stopped. Furthermore, residual torsion measurement can be performed simultaneously.

  In the above, the present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. Will be apparent to those skilled in the art.

  The partial load elongation measuring device, the stranded wire machine, and the winder of the present invention can be suitably used for measuring the quality of a steel cord that is a reinforcing agent for an automobile tire, for example.

1 Partial load elongation measuring device 2 Cord 2a Cord portion 3 Upper sheave 4 Upper sheave 5 Center lower sheave (movable sheave)
6 Gripping member (gripping means)
7 Gripping member (gripping means)
8 Cord tension measuring member (Cord tension measuring means)
9 Tension adjustment member (Tension adjustment means)
DESCRIPTION OF SYMBOLS 10 Fixed shaft 11 Rotation angle detection panel 12 Rotation angle measurement member (Rotation angle measurement means)
13 Calculation member (calculation means)
14 Cord length measuring member (Cord length measuring means)
15 Air cylinder (sheave drive means)
16 Fixing block (fixing means)
16a Notch of fixed block 17 Shaft 18 Fixed block hole 19 Upper surface of fixed block 20 Product spool 21 Stranding machine 22 Supply spool 23 Winder

Claims (8)

A partial load elongation measuring device for measuring a partial load elongation of a cord composed of one or a plurality of filaments,
At least one movable sheave that passes through the cord and is movable in at least one direction;
A gripping means capable of gripping both ends of a cord portion including a portion threaded to the movable sheave in a state where the cord is threaded to the movable sheave;
A cord tension measuring means capable of measuring the tension of the cord portion in a state where both ends of the cord portion are gripped by the gripping means;
Sheave drive means for moving the movable sheave;
A cord length measuring means capable of measuring the length of the cord portion;
Computing means for calculating a partial load elongation of the cord based on the length of the cord portion respectively measured by the cord length measuring means under a plurality of different tensions of the cord portion;
A partial load elongation measuring device comprising:   The portion according to claim 1, comprising at least three sheaves passing through the cord in a U-shape, wherein the movable sheave is a central lower sheave disposed at a central lower portion of the at least three sheaves. Load elongation measuring device. A partial load elongation measuring device capable of further measuring the residual torsion of the cord,
A rotation angle measuring means capable of measuring a rotation angle about an axis passing through a vertical diameter of the central lower sheave;
The calculation means can further calculate a residual torsion of the code based on the rotation angle measured by the rotation angle measurement means,
The gripping means grips both ends of the cord portion when measuring residual torsion;
The partial load elongation measuring device according to claim 2.   The partial load elongation measuring device according to claim 3, further comprising a display unit capable of displaying a value measured by the cord length measuring unit and / or the rotation angle measuring unit.   The partial load elongation measuring apparatus according to claim 3 or 4, wherein the measurement of the residual torsion and the measurement of the partial load elongation can be performed simultaneously.   The partial load elongation measuring device according to claim 1, further comprising a tension adjusting unit capable of adjusting a tension of the cord portion.   It is a stranding machine provided with the partial load elongation measuring apparatus of any one of Claims 1-6, Comprising: The measurement of the said partial load elongation is automatically performed after the twist of the filament of the said cord. A stranded wire machine.   It is a winding machine provided with the partial load elongation measuring apparatus of any one of Claims 1-6, Comprising: The measurement of the said partial load elongation is performed automatically after winding of the said code | cord | chord. And a winder.

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