JP2016132571A - Tension imparting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension imparting device which can impart tension to a wire rod while suppressing damage to the wire rod in traveling, and a filament winding device.SOLUTION: A tension imparting device 100 comprises an electrode 112, an adsorption face 111a and a control part 120, the electrode 112 has at least an electrode element group 115 composed of a pair of a first electrode element 113 and a second electrode element 114, the first electrode element 113 and the second electrode element 114 are alternately aligned in a traveling direction D of a wire rod 10, and the control part 120 slides the wire rod 10 while adsorbing it to the adsorption face 111a by applying reverse-polarity voltages to the first electrode element 113 and the second electrode element 114, and alternately and continuously applying positive/negative reverse-polarity voltages to the same electrode elements 113, 114.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tension applying device.

  Patent Document 1 discloses a filament winding apparatus (FW apparatus) that manufactures a pressure tank by winding a fiber impregnated with resin around a mandrel. In this apparatus, the resin-impregnated fiber is pulled out by a rotating mandrel. However, an embodiment in which the resin-impregnated fiber is sandwiched by three rollers 6, 7 and 8 is disclosed as a tension applying apparatus that applies tension to the running resin-impregnated fiber. Has been.

  Patent Document 2 discloses a tension applying device that sandwiches a fiber bundle between two plate members 41 and 43a in an FW device.

  In these prior arts, the fiber bundle is damaged because the running fiber bundle is bent or sandwiched to apply tension to the fiber bundle. When damaged, some of the fibers may be unwound, which may cause problems such as pressure tank performance degradation and unwound fibers wrapped around the FW device.

JP 2005-255359 A JP 2010-6029 A

  The present invention provides a tension applying device capable of applying tension to the wire while suppressing damage to the running wire.

The first invention is
A tension applying device that applies tension to a traveling wire,
An electrode, an adsorption surface, and a control unit that controls a voltage applied to the electrode,
The electrode has at least one electrode element group composed of a pair of first electrode elements and second electrode elements, and the first electrode elements and the second electrode elements are alternately arranged in the traveling direction of the wire. Are arranged in
The controller applies voltages having opposite polarities to the first electrode element and the second electrode element, and continuously applies positive and negative voltages to the same electrode element alternately, The wire is slid while adsorbing on the adsorption surface.

In the second invention,
The wire is a belt-like fiber bundle.

In the third invention,
A voltage value applied to the first electrode element and the second electrode element is given by a rectangular wave.

In the fourth invention,
The adsorption surface is made of an insulating material.

In the fifth invention,
The said control part can change the peak-to-peak of the voltage value applied to said 1st electrode element and said 2nd electrode element.

In the sixth invention,
A plurality of the electrodes are provided,
The controller can change the number of electrodes to which a voltage is applied.

In the seventh invention,
A tension sensor for detecting the tension of the wire rod;
The control unit changes a peak-to-peak of a voltage value applied to the first electrode element and the second electrode element based on a detection value of the tension sensor.

In the eighth invention,
A tension sensor for detecting the tension of the wire rod;
The control unit changes the number of the electrodes to which the voltage is applied based on the detection value of the tension sensor.

In the ninth invention,
A voltage value applied to the first electrode element and the second electrode element is given as a sine wave.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, when the wire slides on the attracting surface, an attracting force for attracting the attracting surface to the attracting surface with electrostatic force is applied to the wire by applying a voltage from the control unit. Thereby, a wire slides, adsorb | sucking to an adsorption | suction surface. And the dynamic friction force resulting from adsorption | suction force arises with respect to a wire, and this dynamic friction force becomes the tension | tensile_strength provided to a wire. Thereby, tension | tensile_strength can be provided to the said wire, without bending the wire which is drive | working or pinching with a board | plate material. Therefore, it is possible to apply tension to the wire while suppressing damage to the running wire.

  According to 2nd invention, tension | tensile_strength can be provided to the said wire, suppressing damaging to the resin impregnation fiber during driving | running | working.

  According to the third aspect of the invention, steep voltage fluctuations can be caused at the time of rising and falling of the voltage value applied to each electrode element by the control unit. Thereby, adsorption | suction force becomes large and the tension | tensile_strength provided to a wire can be enlarged.

  According to the fourth aspect, since the attracting surface is a dielectric, dielectric polarization occurs by applying positive and negative voltages to the first electrode element and the second electrode element, and the attracting surface can be charged. Thereby, a reverse charge can be induced on the surface of the wire and the wire can be adsorbed. Furthermore, the adsorption surface can be made of a highly wear-resistant material, and the durability of the apparatus can be improved. Examples of the insulating material include ceramics such as alumina, aluminum oxide such as alumite, and rigid resins such as polyimide.

  According to 5th invention, the tension | tensile_strength provided to a wire is adjusted to a desired magnitude | size by changing the peak-to-peak of the voltage value applied to said 1st electrode element and said 2nd electrode element. It becomes possible.

  According to the sixth invention, it is possible to adjust the tension applied to the wire to a desired magnitude by changing the number of the electrodes to which the voltage is applied.

  According to the seventh aspect, the tension applied to the wire can be adjusted to a desired magnitude.

  According to the eighth aspect, the tension applied to the wire can be adjusted to a desired magnitude.

  According to the ninth aspect of the invention, as a sine wave, for example, a commercial AC voltage can be continuously boosted or stepped down and applied continuously, so that an inverter circuit is not required and an electric circuit can be simplified.

(A) The perspective view of 1st embodiment of a tension | tensile_strength provision apparatus, (b) The side view of Fig.1 (a). (A) The figure which shows a Coulomb type electrostatic adsorption part, (b) The figure which shows a gradient type electrostatic adsorption part. The figure which shows the relationship between the tension | tensile_strength provided to a wire, and the voltage applied to an electrode. The side view which shows the tension | tensile_strength provided to a wire. (A) The schematic block diagram which shows 2nd embodiment of a tension | tensile_strength imparting apparatus, (b) The schematic block diagram which shows 3rd embodiment of a tension | tensile_strength imparting apparatus. The figure which shows the relationship between the voltage value and time when the sine wave is continuously applied to the 1st electrode element and the 2nd electrode element. The figure which shows the experimental result when a sine wave is continuously applied to a 1st electrode element and a 2nd electrode element.

[First embodiment]
A tension applying device 100 as a first embodiment of the tension applying device will be described.

The tension applying device 100 applies a tension T to the traveling wire 10.
The wire 10 is a thread-like or strip-like long object. The wire 10 is, for example, a band-shaped fiber bundle, a band-shaped resin-impregnated fiber, roll paper, or the like. The fiber bundle and the resin-impregnated fiber are used in a filament winding apparatus, a braider, or the like.

  As shown in FIGS. 1A and 1B, the tension applying device 100 includes an electrostatic attraction unit 110 and a control unit 120.

The electrostatic attraction unit 110 of this embodiment is installed on the base table 11.
The base 11 is a plate-like member. A travel route for the wire 10 is provided above the base 11.
Rollers 12 and 12 are installed on both ends of the upper surface 11 a of the base 11. The wire 10 is wound around the rollers 12 and 12, and travels in parallel with the upper surface 11 a of the base 11 by the rotation of the rollers 12 and 12. The wire 10 travels in the longitudinal direction.
An electrostatic chuck 110 is installed on the upper surface 11 a of the base 11.

The electrostatic adsorption unit 110 is a sheet-like member. The electrostatic adsorption unit 110 includes an insulating layer (dielectric layer) 111 and an electrode 112 covered with the insulating layer 111.
The insulating layer 111 is fixed to the upper surface 11 a of the base table 11. The insulating layer 111 is installed below the travel path of the wire 10. Thereby, when the wire 10 travels, it travels along the adsorption surface 111 a that is the outer surface of the insulating layer 111. The wire 10 slides on the adsorption surface 111a.
The suction surface 111a is a flat surface. The adsorption surface 111a (insulating layer 111) is a dielectric and is made of an insulating material. Examples of the insulating material include ceramics such as alumina, aluminum oxide such as alumite, and rigid resins such as polyimide. Thereby, the adsorption | suction surface 111a can be comprised with a material with high abrasion resistance, and durability of an apparatus can also be improved.
Of the region where the wire 10 travels, the region that travels along the suction surface 111a is referred to as a suction region X. When the wire 10 travels in the suction region X, the wire 10 travels in a linear direction along the suction surface 111a.

  The electrode 112 is covered with an insulating layer 111. The electrode 112 has at least one electrode element group 115 including a pair of first electrode elements 113 and second electrode elements 114. In the present embodiment, a plurality of electrode element groups 115 are provided. The first electrode elements 113 and the second electrode elements 114 are alternately arranged in the traveling direction D of the wire 10. The first electrode element 113 and the second electrode element 114 are provided along the adsorption region X. The 1st electrode element 113 and the 2nd electrode element 114 are arrange | positioned so that it may oppose through the adsorption | suction surface 111a with respect to the part P which is drive | working the adsorption | suction area | region X in the wire 10. FIG. The first electrode element 113 and the second electrode element 114 are disposed adjacent to each other via the insulating layer 111.

As the electrostatic attraction unit 110, for example, a Coulomb type, a gradient type, or the like is used.
As shown in FIG. 2A, the coulomb-type electrostatic attraction unit 110 has a pair of electrode elements 113 and 114 having a relatively large area, and the pair of electrode elements 113 and 114 are connected to the wire 10. It arrange | positions in the running direction D. The coulomb-type electrostatic adsorption unit 110 adsorbs the wire 10 by a Coulomb force generated between the coulomb-type electrostatic adsorption unit 110 and the wire 10. Two or more electrode elements may be used.
As shown in FIG. 2 (b), the gradient type electrostatic attracting portion 110 has a plurality of pairs of electrode elements 113 and 114 arranged at a pitch of several mm. The electrode elements 113 and 114 are formed in a comb-teeth shape that is intricately paired with each other, and are alternately arranged in the running direction D of the wire 10. The gradient type electrostatic chuck 110 generates a non-uniform electric field on the chucking surface P <b> 1 of the wire 10, and sucks the wire 10 by a gradient force generated between the wire 10.

As shown in FIGS. 1A and 1B, the control unit 120 is connected to the electrostatic adsorption unit 110. The control unit 120 controls the voltage applied to the electrode 112.
The control unit 120 applies voltages having opposite polarities to the first electrode element 113 and the second electrode element 114 and continuously applies positive and negative voltages to the same electrode elements 113 and 114 alternately.
Thereby, the control unit 120 alternately increases and decreases the applied voltage values V1 and V2 for the electrode elements 113 and 114 (see FIG. 3). The timing for lowering the applied voltage value V1 for the first electrode element 113 coincides with the timing for raising the applied voltage value V2 for the second electrode element 114, and the timing for raising the applied voltage value V1 for the first electrode element 113. And the timing of lowering the applied voltage value V2 to the second electrode element 114 coincide with each other (see FIG. 3). “To apply positive and negative voltages alternately and continuously to the same electrode elements 113 and 114” means that positive and negative voltages are alternately applied to the same electrode elements 113 and 114, and positive and negative voltages are applied. The voltage is applied multiple times. The specific number of times of applying the positive and negative voltages is determined in consideration of the length of time for applying the tension T to the wire 10.

As shown in FIG. 1B and FIG. 4, the control unit 120 applies the voltages having opposite polarities to the first electrode element 113 and the second electrode element 114, thereby driving the adsorption region X in the wire 10. A strong electric field is formed on the suction surface P1 of the portion (suction portion) P, and the suction surface P1 is polarized. Then, a potential difference is generated between the electrostatic attraction part 110 and the attraction part P of the wire 10. As a result, an adsorption force F <b> 1 that is adsorbed on the adsorption surface 111 a of the insulating layer 111 is applied to the adsorption portion P of the wire 10 by electrostatic force. That is, since the attracting surface 111a is a dielectric, the controller 120 applies a positive or negative voltage to the first electrode element 113 and the second electrode element 114 to cause dielectric polarization, thereby charging the attracting surface 111a. it can. As a result, a charge opposite to that of the adsorption surface 111a of the insulating layer 111 is induced on the surface (adsorption surface P1) of the adsorption portion P of the wire 10, and the adsorption surface 111a is applied to the adsorption portion P of the wire 10 by electrostatic force. An adsorption force F1 for adsorption is applied. The electrostatic force of this embodiment is the Coulomb force or the gradient force.
When the wire 10 is traveling, the wire 10 slides on the attracting surface 111a while being attracted to the attracting surface 111a by electrostatic force. Specifically, when the wire 10 is traveling, the suction portion P of the wire 10 slides on the suction surface 111a (sliding in contact with the suction surface 111a) with the suction force F1 applied. As a result, a dynamic friction force F2 is generated on the wire 10 (F2 = μN). μ is a dynamic friction coefficient of the suction surface 111a. N is the vertical drag that the suction portion P of the wire 10 receives from the suction surface 111a. In this embodiment, for convenience of explanation, it is assumed that the weight or the like of the suction portion P of the wire 10 is ignored, and the vertical drag N is equal to the suction force F1 (N = F1).
As described above, the control unit 120 generates the suction force F <b> 1 for the wire 10. As a result, a dynamic friction force F2 is generated in the direction opposite to the traveling direction D of the wire 10 (F2 = μN = μF1). This dynamic friction force F2 becomes the tension T applied to the wire 10 (F2 = T).
That is, the control unit 120 applies voltages having opposite polarities to the first electrode element 113 and the second electrode element 114, and alternately applies positive and negative reverse polarity voltages to the same electrode elements 113 and 114. The wire 10 is slid on the suction surface 111a. According to this, when the wire 10 slides on the suction surface 111a, by the application of a voltage by the control unit 120, an adsorption force F1 that causes the wire 10 to be attracted to the suction surface 111a by electrostatic force is applied. And the dynamic friction force F2 resulting from the adsorption | suction force F1 arises with respect to the wire 10, and this dynamic friction force F2 becomes the tension | tensile_strength T provided to the wire 10 (F2 = T).

  If a static object is attracted to the electrostatic attraction part, when a voltage is applied to the electrode of the electrostatic attraction part, an attracting force to attract the static object to the electrostatic attraction part is generated. Thereby, a stationary object is adsorbed by the electrostatic adsorption part. When the applied voltage value is maintained as it is without being changed, the attracting force applied to the stationary object decreases very slowly without rapidly decreasing. This is because the stationary object is stationary with respect to the electrostatic attraction part, and only the voltage value at the time of application is maintained, and the decrease in the potential difference between the stationary object and the electrostatic attraction part is prevented. As a result, the reduction of the adsorption force is hindered. Thereby, a stable adsorption force can be obtained. Therefore, when a stationary object is attracted to the electrostatic attraction unit, the applied voltage value may be maintained as it is, except when a stationary object is attracted to the electrostatic attraction unit for a long time, and there is no need to change it. .

  On the other hand, when the traveling wire 10 is attracted as in this embodiment, the contact surface between the wire 10 and the electrostatic attracting portion 110 is constantly changed. As a result, when a voltage is applied to the electrode 112, the attractive force F1 is generated. However, if the applied voltage values V1 and V2 are maintained as they are, the attractive force F1 decreases rapidly and rapidly. End up. This occurs because even if a potential difference occurs between the wire 10 and the electrostatic chuck 110 due to the application of voltage, the contact surface between the wire 10 and the electrostatic chuck 110 changes as the wire 10 travels. This is because the potential difference is eliminated immediately. As a result, the tension T applied to the wire 10 is quickly and rapidly reduced. This makes it difficult to stably apply the tension T to the wire 10.

Therefore, in the present embodiment, the control unit 120 is configured to continuously and continuously apply positive and negative polarities to the same electrode elements 113 and 114 (see FIG. 3). In other words, the control unit 120 alternately and continuously increases and decreases the applied voltage values V1 and V2 for the electrode elements 113 and 114, respectively.
According to this, whenever the control part 120 raises / lowers voltage value V1 * V2, the electric potential difference between the wire 10 and the electrostatic attraction | suction part 110 revives. Thereby, whenever the control part 120 raises / lowers voltage value V1 * V2, the adsorption | suction force F1 provided to the wire 10 rises, and the tension | tensile force T provided to the wire 10 also rises in connection with this (FIG. 3 and FIG. 4).
Therefore, even if the tension T decreases due to the travel of the wire 10, it is possible to recover the decrease in the tension T by increasing the tension T every time the control unit 120 increases or decreases the voltage values V <b> 1 and V <b> 2 ( 3), the tension T can be continuously applied to the traveling wire 10. This makes it possible to stably apply the tension T to the running wire 10.

In addition, the control part 120 applies the voltage of positive / negative reverse polarity to the same electrode element 113 * 114 alternately with a fixed period. Thereby, the tension T applied to the wire 10 fluctuates substantially periodically. The fluctuation period of the tension T coincides with the increase / decrease period of the voltage values V1 and V2 by the control unit 120 (see FIG. 3).
The fluctuation ranges (peak-to-peak) W1 and W2 of the voltage values V1 and V2 when the control unit 120 increases and decreases the voltage values V1 and V2 applied to the electrode elements 113 and 114 have a certain magnitude (see FIG. 3).

Further, the controller 120 continuously applies positive and negative voltages to the same electrode elements 113 and 114 alternately, and changes the polarity of the voltage applied to each electrode element 113 and 114 at a predetermined time interval tα. (See FIG. 3).
The time interval tα is a value that can maintain a state where the tension T applied to the wire 10 is equal to or greater than a predetermined allowable lower limit T0 (see FIG. 3). The time interval tα and the allowable lower limit T0 are determined in advance by an operator or the like. Information on the time interval tα is stored in the control unit 120.

  As shown in FIG. 3, the voltage values V1 and V2 applied to the electrode elements 113 and 114 are given by rectangular waves L1 and L2. Specifically, in the coordinate system in which the vertical axis represents voltage values V1 and V2 applied to the electrode elements 113 and 114 and the horizontal axis represents time t, the voltage values V1. V2 is a graph of rectangular waves L1 and L2. The first rectangular wave L1 indicating the voltage value V1 applied to the first electrode element 113 and the second rectangular wave L2 indicating the voltage value V2 applied to the second electrode element 114 have the same period ( 2tα), and the phase of the first rectangular wave L1 is shifted by a half period (tα) with respect to the phase of the second rectangular wave L2. The controller 120 sharply increases or decreases the voltage values V1 and V2 by increasing and decreasing the voltage values V1 and V2 applied to the electrode elements 113 and 114 based on the rectangular waves L1 and L2. At the time of falling, a steep voltage fluctuation is caused. Thereby, the increase amount Tu of the tension T when the control unit 120 increases or decreases the voltage values V1 and V2 can be increased. As a result, the adsorption force F1 is increased and the tension T applied to the wire 10 can be increased.

The increase amount Tu of the tension T when the control unit 120 increases or decreases the voltage values V1 and V2 tends to increase as the fluctuation ranges W1 and W2 of the voltage values V1 and V2 applied to the electrode elements 113 and 114 increase. (See FIG. 3). Accordingly, the average value of the tension T applied to the wire 10 can be increased by increasing the fluctuation range W1 · W2 of the voltage values V1 and V2 and increasing the increase amount Tu of the tension T. Moreover, the average value of the tension | tensile_strength T imparted to the wire 10 can be made small by making the fluctuation range W1 * W2 of voltage value V1 * V2 small, and making the raise amount Tu of the tension | tensile_strength T small.
Therefore, the control unit 120 can adjust the tension T applied to the wire 10 by changing the fluctuation ranges W1 and W2 of the voltage values V1 and V2 applied to the electrode elements 113 and 114.
As a result, the tension T applied to the wire 10 can be adjusted to a desired magnitude.

As described above, the tension applying device 100 includes the electrode 112, the insulating layer 111 that covers the electrode 112, and the control unit 120 that controls the voltage applied to the electrode 112, and when the wire 10 travels, There is an adsorption region X that travels along the adsorption surface 111 a that is the outer surface of the insulating layer 111, and the electrode 112 has at least one electrode element group 115 including a pair of first electrode elements 113 and second electrode elements 114. The first electrode element 113 and the second electrode element 114 are alternately arranged in the traveling direction D of the wire 10, and the control unit 120 is connected to the first electrode element 113 and the second electrode element 114. While applying a reverse polarity voltage and alternately applying positive and negative reverse polarity voltages alternately to the same electrode elements 113 and 114, the portion P of the wire 10 running in the adsorption region X For it, while applying a suction force F1 to be sucked to the suction surface 111a by the force of static electricity, sliding the suction surface 111a.
According to this, when the wire 10 slides on the suction surface 111a, a dynamic friction force F2 due to the suction force F1 is generated on the wire 10, and this dynamic friction force F2 becomes a tension T applied to the wire 10 ( (See FIG. 4). Thereby, the tension | tensile_strength T can be provided to the wire 10, without bending the wire 10 in driving | running | working or pinching with a board | plate material. Therefore, it is possible to apply the tension T to the wire 10 while suppressing damage to the running wire 10.

[Second Embodiment]
A tension applying device 200 that is a second embodiment of the tension applying device will be described.

  In the following description, it demonstrates paying attention to difference with the tension | tensile_strength imparting apparatus 100, about the same structure as the tension | tensile_strength imparting apparatus 100, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As illustrated in FIG. 5A, the tension applying device 200 includes an electrostatic attraction unit 110, a control unit 120, and a tension sensor 130.

The tension sensor 130 detects the tension T applied to the wire 10. The tension sensor 130 is, for example, a contact type tension sensor provided with a strain gauge. The tension sensor of the present invention is not limited to the tension sensor 130 of the present embodiment as long as it can detect the tension of the wire.
The tension sensor 130 is provided on the downstream side of the electrostatic attraction unit 110. The tension sensor 130 may be provided on both the upstream side and the downstream side of the electrostatic attraction unit 110.
The tension sensor 130 is connected to the control unit 120. The tension sensor 130 detects the tension T of the wire 10 and transmits a detected value of the tension T to the control unit 120.

  The control unit 120 changes the fluctuation ranges W1 and W2 of the voltage values V1 and V2 when raising and lowering the voltage values V1 and V2 applied to the electrode elements 113 and 114 based on the detection value of the tension sensor 130 (FIG. 3). reference).

  The control unit 120 compares the detection value Tx of the tension sensor 130 with a predetermined target tension Ty. If the detection value Tx of the tension sensor 130 is different from the target tension Ty, the detection value Tx of the tension sensor 130 is The fluctuation ranges W1 and W2 of the voltage values V1 and V2 are changed so as to approach the target tension Ty.

  The tension T applied to the wire 10 varies periodically (see FIG. 3). Accordingly, the target tension Ty is also set to a value that periodically varies in accordance with the variation period of the tension T. The target tension Ty is set in advance by an operator or the like. Information on the target tension Ty is stored in the control unit 120.

The controller 120 brings the detection value Tx of the tension sensor 130 closer to the target tension Ty by performing the following controls (1) and (2).
(1) When the detection value Tx of the tension sensor 130 is smaller than the target tension Ty, the control unit 120 increases the fluctuation ranges W1 and W2 of the voltage values V1 and V2. As a result, the detection value Tx of the tension sensor 130 increases and approaches the target tension Ty.
(2) When the detected value Tx of the tension sensor 130 is greater than the target tension Ty, the control unit 120 decreases the fluctuation range W1 · W2 of the voltage values V1 · V2. As a result, the detection value Tx of the tension sensor 130 decreases and approaches the target tension Ty.
According to this, it becomes possible to adjust the tension T applied to the wire 10 to a desired magnitude.

[Third embodiment]
A tension applying device 300 as a third embodiment of the tension applying device will be described.

  In the following description, the difference from the tension applying devices 100 and 200 will be described. The same components as those of the tension applying devices 100 and 200 will be denoted by the same reference numerals and detailed description thereof will be omitted.

  As illustrated in FIG. 5B, the tension applying device 200 includes an electrostatic attraction unit 110, a control unit 120, and a tension sensor 130.

A plurality of electrostatic chucks 110 are provided.
Each electrostatic adsorption unit 110 includes an insulating layer 111 and an electrode 112.
The control unit 120 is connected to each electrostatic adsorption unit 110. The control unit 120 controls the voltage applied to the electrode 112 of each electrostatic adsorption unit 110.

  The control unit 120 changes the number of electrodes 112 to which a voltage is applied based on the detection value of the tension sensor 130.

  The control unit 120 compares the detection value Tx of the tension sensor 130 with the target tension Ty. If the detection value Tx of the tension sensor 130 is different from the target tension Ty, the detection value Tx of the tension sensor 130 is the target tension. The number of electrodes 112 to which a voltage is applied is changed so as to approach Ty.

The controller 120 brings the detection value Tx of the tension sensor 130 closer to the target tension Ty by performing the following controls (i) and (ii).
(I) When the detection value Tx of the tension sensor 130 is smaller than the target tension Ty, the control unit 120 increases the number of electrodes 112 to which a voltage is applied. Thereby, the area | region where the adsorption | suction force F1 generate | occur | produces in the adsorption | suction surface 111a of the insulating layer 111 increases, and the adsorption | suction force F1 provided to the wire 10 becomes large. As a result, the detection value Tx of the tension sensor 130 increases and approaches the target tension Ty.
(Ii) When the detected value Tx of the tension sensor 130 is larger than the target tension Ty, the control unit 120 reduces the number of electrodes 112 to which the voltage is applied. Thereby, the area | region where the adsorption | suction force F1 generate | occur | produces in the adsorption | suction surface 111a of the insulating layer 111 reduces, and the adsorption | suction force F1 provided to the wire 10 becomes small. As a result, the detection value Tx of the tension sensor 130 decreases and approaches the target tension Ty.
According to this, it becomes possible to adjust the tension T applied to the wire 10 to a desired magnitude.

  The operator measures in advance the correlation between the voltage values V1 and V2 applied to the electrode elements 113 and 114 and the tension T applied to the wire rod 10, and based on the measurement result, the electrode elements Even if the conversion formula or conversion table for converting the voltage values V1 and V2 applied to 113 and 114 into the tension T applied to the wire 10 is created, the created conversion formula or conversion table may be stored in the control unit 120. Good. Thereby, the control unit 120 can adjust the tension T applied to the wire 10 based on the conversion formula or the conversion table. In this case, the tension sensor 130 is not necessary.

In the first to third embodiments, voltages having opposite polarities are applied to the first electrode element 113 and the second electrode element 114, and positive and negative voltages are alternately and continuously applied to the same electrode elements 113 and 114. Although the control to apply to the first electrode element 113 and the second electrode element 114 has been described, the frequency is also controlled by continuously applying the sine waves L1 ′ and L2 ′ obtained by stepping up or down alternating voltages having opposite polarities to each other. It has been confirmed by the present inventors that tension can be applied to the wire 10 at a commercial AC power level.
Accordingly, the control unit 120 applies voltages having opposite polarities to the first electrode element 113 and the second electrode element 114, and continuously applies positive and negative reverse polarity voltages to the same electrode elements 113 and 114 alternately. In this case, the case where the voltage values V1 and V2 applied to the first electrode element 113 and the second electrode element 114 are given by sine waves L1 ′ and L2 ′ is included (see FIG. 6). In this case, in the coordinate system in which the vertical axis represents the voltage values V1 and V2 applied to the electrode elements 113 and 114 and the horizontal axis represents time t, the voltage values V1. V2 is a graph of sine waves L1 ′ and L2 ′. The first sine wave L1 ′ indicating the voltage value V1 applied to the first electrode element 113 and the second sine wave L2 ′ indicating the voltage value V2 applied to the second electrode element 114 have a period. The phase is the same (2tα), and the phase of the first sine wave L1 ′ is shifted from the phase of the second sine wave L2 ′ by a half cycle (tα).

  FIG. 7 shows experimental results when the sine waves L1 ′ and L2 ′ are continuously applied to the first electrode element 113 and the second electrode element 114, and the tension (tension) T applied to the traveling wire 10 and The relationship of elapsed time is plotted. From this figure, it can be understood that the tension T is applied to the traveling wire 10 even when the sine waves L1 ′ and L2 ′ are continuously applied to the first electrode element 113 and the second electrode element 114. In particular, as the frequency of the applied sine waves L1 ′ and L2 ′ increases (30 Hz → 60 Hz → 70 Hz), the tension T applied to the traveling wire 10 increases. This is because as the frequency increases, the voltage fluctuation becomes steep, and the same effect as when the rectangular waves L1 and L2 are applied can be obtained. Therefore, the tension T applied to the traveling wire 10 can be controlled by dynamically changing the frequencies of the sine waves L1 ′ and L2 ′ applied to the first electrode element 113 and the second electrode element 114.

  The tension applying device 100 of the above-described embodiment can be suitably applied to a winding device such as a filament winding device, a braiding device, or roll paper.

DESCRIPTION OF SYMBOLS 10 Wire rod 100 Tension | tensile_strength imparting apparatus 111 Insulating layer 111a Adsorption surface 112 Electrode 113 1st electrode element 114 Second electrode element 115 Electrode element group 120 Control part

Claims (9)

A tension applying device that applies tension to a traveling wire,
An electrode, an adsorption surface, and a control unit that controls a voltage applied to the electrode,
The electrode has at least one electrode element group composed of a pair of first electrode elements and second electrode elements, and the first electrode elements and the second electrode elements are alternately arranged in the traveling direction of the wire. Are arranged in
The controller applies voltages having opposite polarities to the first electrode element and the second electrode element, and continuously applies positive and negative voltages to the same electrode element alternately, The wire rod is slid while adsorbing to the adsorption surface,
Tensioning device. The wire is a strip-shaped fiber bundle,
The tension applying device according to claim 1. A voltage value applied to the first electrode element and the second electrode element is given by a rectangular wave,
The tension | tensile_strength provision apparatus of Claim 1 or Claim 2. The adsorption surface is made of an insulating material,
The tension | tensile_strength provision apparatus as described in any one of Claims 1-3. The control unit can change a peak-to-peak of a voltage value applied to the first electrode element and the second electrode element,
The tension | tensile_strength provision apparatus as described in any one of Claims 1-4. A plurality of the electrodes are provided,
The control unit can change the number of the electrodes to which a voltage is applied,
The tension | tensile_strength provision apparatus as described in any one of Claims 1-4. A tension sensor for detecting the tension of the wire rod;
The control unit changes a peak-to-peak of a voltage value applied to the first electrode element and the second electrode element based on a detection value of the tension sensor,
The tension | tensile_strength provision apparatus of Claim 5. A tension sensor for detecting the tension of the wire rod;
The control unit changes the number of the electrodes to which a voltage is applied based on a detection value of the tension sensor,
The tension | tensile_strength provision apparatus of Claim 6. A voltage value applied to the first electrode element and the second electrode element is given as a sine wave,
The tension | tensile_strength provision apparatus of Claim 1 or Claim 2.