JPH047555U

JPH047555U -

Info

Publication number: JPH047555U
Application number: JP4741290U
Authority: JP
Priority date: 1990-05-08
Filing date: 1990-05-08
Publication date: 1992-01-23

Description

[Brief explanation of drawings]

第１図〜第５図は本考案の一実施例を示す説明
図で、その内、第１図はその回路構成をも含む正
面図、第２図は動作から見たブロツク線図、第３
図および第４図は巻出し径に対する特性図、第５
図は荷重センサ付きの電磁ブレーキの構成例を示
す要部縦断側面図である。また、第６図〜第８図
は従来例を示すもので、その内第６図は回路構成
をも含む正面図、第７図は動作から見たブロツク
線図、第８図は巻径に対するトルク特性図である
。１……巻出物（巻取物）、２……巻出しロール
（巻取りローラ）、Ｋ……回転検出器、８……パ
ルス発電機、９……コントローラ、１０……電磁
ブレーキ（電磁クラツチ）、１１……荷重センサ
、Ｆ……アウターフイン、Ｇ……固定部、ＭＬ…
…機械損相当信号。 1 to 5 are explanatory diagrams showing one embodiment of the present invention, of which FIG. 1 is a front view including its circuit configuration, FIG. 2 is a block diagram seen from the operation, and FIG.
Figure 4 and Figure 4 are characteristic diagrams for the unwinding diameter, Figure 5
The figure is a longitudinal sectional side view of a main part showing an example of the configuration of an electromagnetic brake with a load sensor. In addition, Figures 6 to 8 show conventional examples, of which Figure 6 is a front view including the circuit configuration, Figure 7 is a block diagram seen from the operation, and Figure 8 is a diagram showing the winding diameter. It is a torque characteristic diagram. DESCRIPTION OF SYMBOLS 1... Unrolled material (rolled material), 2... Unwinding roll (winding roller), K... Rotation detector, 8... Pulse generator, 9... Controller, 10... Electromagnetic brake (electromagnetic brake) clutch), 11...Load sensor, F...Outer fin, G...Fixed part, ML...
...Mechanical loss equivalent signal.

Claims

[Claims for Utility Model Registration] 1. In a tension control device that unwinds a material such as paper wound on an unwinding roll at a constant tension,
An electromagnetic brake that applies braking force to the unwinding roll, a rotational speed detector that detects the rotational speed of the unwinding roll, a pulse generator that detects the number of pulses generated in one rotation of the unwinding roll, and these rotational speed detectors. The winding diameter of each unwinding roll is calculated based on the output from the pulse generator, and an outer fin is attached to the magnetic pole of the electromagnetic brake and the controller that generates the appropriate tension corresponding to this winding diameter. It is equipped with a load sensor provided over the outer fin and the fixed part, and by feeding back a signal corresponding to the tension of the unrolled material detected by the load sensor to the controller, it is possible to obtain a deviation signal between the appropriate tension signal and the feedback signal. However, the tension control device is characterized in that the tension of the unwound product is always maintained at a constant tension by exciting an electromagnetic brake using this deviation signal. 2 Claim 1, wherein the signal corresponding to the mechanical loss of the device is added in advance to the tension setting signal of the controller.
Tension control device as described. 3. The tension according to claim 1 or 2, wherein the unwinding roll is replaced with a take-up roll, and the electromagnetic brake is replaced with an electromagnetic clutch, so that the tension of the roll wound by the take-up roll is always constant. Control device. 4. The tension control device according to claim 1, wherein an arm-type load cell is used as the load sensor.