JP2005112625A - Slip torque type tension mechanism device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension mechanism for solving the problems of reduction of the error between an actually measured value and a set value and enlargement of limit width of set scope amount, in order to solve the problems of error of a tensile force value due to large change of spring tensile force, troublesome spring replacement for a value exceeding the set value, error of the actually measured value for the set value by pneumatic conversion by electropneumatic control, and enlargement of scope limit of change amount with the lowest set value in a conventional spring type tension. <P>SOLUTION: This mechanism is constituted in such a way that slip characteristic of a powder clutch brake obtaining fixed torque for setting of voltage through a main shaft in a tension lever applied to a material is utilized to give constant rotation to a powder clutch by an induction motor and generate fixed torque in the tension lever connected with the main shaft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

  The present invention relates to a slip torque type tension mechanism device used in a winding device, and particularly used in the manufacture of a capacitor, a secondary battery or the like.

Conventional technology

  For example, a secondary battery such as a lithium battery has a positive electrode current collector having a coating portion in which a positive electrode active material is provided on a metal current collector at regular intervals, and a negative electrode active material on a metal current collector at regular intervals. A negative electrode current collector having a coated portion, and the positive and negative electrode current collectors (battery element material) wound through an insulator such as a separator as a battery element, and accommodated in a case Configured.

  In the winding device for obtaining the secondary battery element having such a configuration, the positive and negative battery element materials (raw material) and separators such as separators wound up in a roll shape are intermittently and intermittently sent to the winding part. The battery element is wound by winding with a wound core, and the positive / negative battery element material and an insulator such as a separator are cut to a predetermined length. By controlling the tension of the material from the original fabric part of the positive / negative battery element material to the wound core to be constant, the outer dimensions of the wound battery element are made constant and the winding state deviation is reduced. By doing so, the quality of the winding element accuracy is improved.

  Conventionally, as a method of tension control, there are a method of setting a tension using a repulsive force of a spring or a method of performing electropneumatic control using an air pressure.

Problems to be solved by the invention

  In the case of the spring type described above, the setting of the spring strength changes depending on the setting. Alternatively, an error occurs in the change in spring deflection due to the fluctuation position of the dancer roller, and an error occurs in the tension value. Even in the case of controlling with air pressure, the range of error is large in the control with low pressure value, and quantitative control cannot be performed.

  The present invention is to solve these problems, and when a powder clutch or the like is used via a motor as a drive source of tension, even if the slip speed changes, the transmission torque corresponds to the current value, This utilizes the characteristic that a substantially constant value can be obtained.

Means for solving the problem

  In order to solve the above-mentioned problems, in the present invention, a motor is provided in the tension drive source, the tip of the motor shaft is jointed with the powder clutch, and the tension is applied from the tip of the powder clutch via the lever shaft applied to the material. Tension is applied to the required battery material.

  With this mechanism configuration, the motor is always rotated, and in this state, a constant torque can be output according to the current applied to the powder clutch. Therefore, uniform tension control can be performed on the electrode material, and the quality of the secondary battery element can be uniformly and accurately raised. Furthermore, since a constant torque can be obtained from the powder clutch even in a light tension setting, the hardness and looseness of the element can be adjusted.

  Embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a slip torque type tension device according to an embodiment of the present invention. As shown in FIG. 1, the current that the operable tension lever 1b gives to the powder clutch 1e via the tension main shaft 1d the tension necessary to scoop off the electrode material 1a used in the winding machine of the secondary battery. A constant torque can be output by setting the value.

  Further, in order to detect the angle change of the tension lever 1b, the potentiometer 1f provided at the tip of the tension lever 1b is used to replace the angle change amount with a voltage, and to control the feed amount of the electrode material 1a. By arbitrarily changing the voltage of the powder clutch 1e, it is possible to wind up a highly accurate element without unevenness.

Next, in FIG. 2, the concept of the configuration is shown. Torque generated from the motor Tm is controlled by the powder clutch S and output to the step lever N by the output shaft T. Expressed by the formula:
From S = (Tm-T) / Tm T = Tm (1-S)
The output T can be obtained by multiplying the difference of the torque S generated by the slip of the powder clutch by the torque Tm generated by the motor.

The invention's effect

  Although the present invention is as described above, according to the slip torque type tension mechanism device of the present invention, the powder can be used without considering the error of the tension change by the spring and the error in the pneumatic pressure conversion of electropneumatic control. Due to the mechanism configuration that uses the proportionality between the clutch voltage and the constant torque, it is possible to obtain a tension value with less error with respect to the set value in the control and scrape the secondary battery element and capacitor element. Become. In addition, even with a light tension setting, the torque at a low voltage of the powder clutch is constant, so that it is possible to scrape uniform secondary battery elements and capacitor elements.

It is a schematic block diagram of the slip torque type tension mechanism apparatus of this invention. It is a composition conceptual diagram of the present invention.

Explanation of symbols

1a Electrode material 1b Tension lever 1c Tension roller 1d Main shaft 1e Powder clutch 1f Potentiometer 1g Potentiometer mounting bracket 1h Induction motor 1i Powder clutch mounting bracket Tm Motor torque T Output torque S Powder clutch slip torque

Claims (4)

  In a winding device used in the manufacturing process of strips such as capacitors and secondary batteries, the motor and powder clutch are used for tension control of the capacitor and battery element material, and the rotational force input from the motor is used as a powder clutch. A slip torque type tension mechanism device characterized in that a tension is generated in a dancer roller by utilizing a torque difference generated by a slip action in an output of a powder clutch by transmitting.   2. The apparatus according to claim 1, wherein a powder clutch or the like is used, and in order to utilize current-torque characteristics, a DC power source is used to input and set an arbitrary voltage, and control of tension torque is controlled. Slip torque type tension mechanism device.   The apparatus according to claim 1, wherein the powder clutch or the like generates a stable slip torque, or the motor and the powder clutch are connected, thereby making it possible to perform a smooth operation at the time of material tension control by taking advantage of a low shock during braking. A slip torque type tension mechanism device.   2. The apparatus of claim 1 wherein a belt is used at the joint of the motor outlet and dancer roller input shaft to obtain a difference in slip torque at the motor outlet and the input to the dancer roller, and the belt and dancer roller input. A slip torque type tension mechanism device characterized in that a slip torque input to a tension is easily generated by changing a belt tension of a pressure contact force to a shaft to generate a tension on a dancer roller.

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