JPH0464976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a long flexible material such as paper, metal, cloth, plastic or other wire or strip material for conveying it under a predetermined tension. The present invention relates to a conveyance control device for flexible materials.

BACKGROUND TECHNOLOGY AND PROBLEMS THEREOF As a conveyance control device for a long flexible material, a sectional drive is often employed in which a drive source is provided individually for each group of conveyance rolls. This sectional drive measures the tension of the conveyed material in the conveying section between each unit and controls the drive motor of each unit according to the measured value, but in this case, from the time the drive motor starts up, It is necessary to control each drive motor over a wide range up to a steady state, and it is difficult to control such a wide range with high precision, making the control device more complicated. Also, in control during steady operation, there is a problem in that the conveying sections lack mutual cooperation, which is not desirable in terms of control accuracy, and if cooperative control is attempted, the apparatus becomes even more complex.

The present invention solves these problems and provides a long flexible roller that can control the speed of the conveyor roll from the start of rotation to a steady state with high precision and based on a relatively simple structure. The purpose of the present invention is to provide a transport control device for flexible materials.

Means for Solving the Problems The object of the present invention is to provide a long flexible material transport control device for transporting a long flexible material under a predetermined tension using a plurality of transport rolls, A common drive unit connected to a common drive source for the base conveyance rolls, and a pair of sun gear shafts disposed for at least one of the conveyance rolls are used as input and output shafts, respectively. the actuating gear device configured as a gear device in which the input shaft is connected to the drive unit and the output shaft is connectable to the conveyance roll; and tension detection for detecting tension in a flexible material between adjacent conveyance rolls. means, a target setting means for storing a set target value of flexible material tension between the adjacent transport rolls, and an output according to the difference between the tension detected by the tension detecting means and the target value. Comparison calculation means for emitting a signal, and fine adjustment driving means for revolving a planetary gear of the operating gear device around the input shaft or output shaft at a rotation speed corresponding to the output from the comparison calculation means. This is achieved by a conveyance control device for a long flexible material characterized by the following.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an example of a conveyance control device according to the present invention, and FIG. 2 is a block diagram showing its control mechanism. This conveyance control device includes conveyor rolls A,
B, . A single drive shaft 1 is connected to the common drive source M, and a power supply shaft to each transport roll is connected from the drive shaft 1 via an appropriate transmission means such as a bevel gear. For example, for the transport roll B, an operating gear device 3 is disposed between the drive shaft 1 and the transport roll B, and the operating gear device 3 uses a pair of sun gears as an input shaft and an output shaft,
The input shaft 30 is connected to the drive shaft 1, and the output shaft 31 is connected to the conveyance roll B. Operating gear device 3
The planetary gears are rotated by a fine adjustment control motor 4 provided separately from the common drive source M. The detailed structure of the operating gear device 3 will be explained later.

A tension detection means 5 made of a flexible material is provided between adjacent transport rolls A and B. For example, as shown in the figure, this tension detection means 5 includes a dancer roll 50 supported in a suspended state by a flexible material S, and a position detection device 51 for detecting the position of the dancer roll. can do.
Or, as illustrated for the transport roll N,
A flexible member is supported from above and below by three rolls 52, 53, and 54 spaced apart, and the tension detection means 5 is configured to detect the tension of the flexible material from the pressure applied to the middle roll 53. Appropriate means such as these can be adopted.

In the following, explanation will be made regarding the relationship between the conveyance rolls A and B. A microprocessor 6 is connected to the tension detection means 5. The microprocessor 6 includes a target value setting section 60 and a comparison calculation section 61. The target value setting section 60 stores a set target value of the flexible portion material tension between the adjacent rolls A and B. The comparison calculation unit 61 receives the output from the tension detection means 5, compares the detected tension with a target value, and issues an output signal according to the difference. The output of the comparison calculation unit 61 is transmitted to the control unit 40 of the control motor 4 for fine adjustment, and the control unit 40 rotates the planetary gear of the operating gear device 3 at the rotation speed according to the output from the comparison calculation unit 61 to the input shaft. The drive section of the control motor 4 is controlled so as to revolve around the output shaft 30 and the output shaft 31.

The operating gear device 3 has the following structure. As shown in FIGS. 3 and 4, an input shaft 30 and an output shaft 31 extend through bearings in a casing 32 and into the casing, each having a sun gear 33 at its end.
and 34. Planet gears 35 and 36 mesh with the sun gears 33 and 34, respectively. A pair of planetary gears 35 and 36 are provided at opposing positions, and each shaft is movably supported by a pair of support plates 37. A pair of support plates 37, 37 are connected to the casing 32
An input shaft 30 and an output shaft 31 are movably supported by
are loosely passed through the center, and are integrally connected to each other by a body plate 38. One support plate 3
A large gear 370 is fixed to the outer surface of 7.
A worm 39 meshes with the large gear, and the shaft of the worm passes through the casing 32 and is connected to the fine adjustment drive motor 4.

The rotation speeds of the input shaft 30 and the large gear 370 are each n ₃₀ ,
If n is ₃₇₀ , the output shaft 3 is
The rotational speed n ₃₁ of 1 is determined by the formula n ₃₁ = n ₃₀・Z ₃₃・Z ₃₆ /Z ₃₅・Z ₃₄ +n ₃₇₀ (1−Z ₃₃・Z ₃₆ /Z ₃₅・Z ₃₄ ). Here, n ₃₀ , n ₃₁ , n ₃₇₀ : Rotation speed with specific rotation direction as positive Z ₃₃ : Number of teeth of sun gear 33 Z ₃₄ : Number of teeth of sun gear 34 Z ₃₅ : Number of teeth of planetary gear 35 Z ₃₆ : Number of teeth of the planetary gear 36. Therefore, by approximating the number of teeth of the sun gear and the planetary gear, the large gear 3
It becomes possible to produce an extremely small change in the output shaft 31 compared to the change in the rotation speed of 70.

For example, Z ₃₃ = 31, Z ₃₄ = 33, Z ₃₅ = 33, Z ₃₆ = 31
If n ₃₀ =1800 rpm, then n ₃₁ =1588.43+n ₃₇₀ ×0.117539. When the gear ratio between the worm 39 and the large gear 370 is 1:50, the rotation speed of the output shaft 31 is ±0.235 rpm when the rotation speed control range of the control motor 4 is 0 to ±100 rpm, and the rotation speed of the control motor 4 is ±0.235 rpm. When the number control width is 0 to ±2000 rpm, it becomes ±4.7 rpm, and extremely small rotational speed control is performed on the control value of the control motor 4. If it is necessary to make the rotational speeds of rolls A and B substantially the same because rolls having the same diameter are used, a speed change gear may be inserted into the input shaft 30 or output shaft 31 of roll B. In this example, a speed increasing gear with a transmission ratio of 34/30 is used, and when inserted into the input shaft 30, n ₃₁ = 1800.22 + n ₃₇₀ × 0.117539 When inserted into the output shaft 31, n ₃₁ = 1800.22 + n ₃₇₀ × 0.117539 × 34/30 The output shaft rotation speed is obtained.

In this way, the output shaft 3 is controlled by the large gear 370.
1. Extremely high precision rotation speed control is possible. In this example, since the large gear 370 is further driven by the worm 39, it is possible to control the output rotation speed with higher precision.

Although the above description is about the transport rolls A and B, control based on the same configuration can be implemented for other transport rolls as well. Of course, this control does not necessarily have to be performed on all transport rolls, but is performed on necessary transport sections. Further, the conveyance roll to be controlled may be an upstream roll or a downstream roll of the conveyance section that requires control. In addition to the example shown in the drawings, various types of gears capable of fine adjustment can be used, such as a combination of bevel gears. As the drive means for fine adjustment, in addition to providing a control motor as in the above-mentioned example, power from the common drive shaft 1 is transmitted through a continuously variable transmission for the revolution of the planetary gear. Various drive forms can be employed, such as the transmission ratio of the transmission being controlled in accordance with the output from the above-mentioned comparison calculation means.

Effects of the Invention According to the present invention, it is possible to provide a flexible material conveyance control device that has the following effects. That is, each of the plurality of transport rolls is driven from the start of rotation to a steady state based on a common drive shaft connected to a common drive source, and the fine adjustment drive means performs tension control during this drive. Since it is only necessary to rotate as much as necessary for control when necessary, the control range can be narrowed, which is advantageous for realizing highly accurate control. Moreover, the conveyor roll is connected to the drive shaft via an operating gear device having a pair of sun gears as input and output shafts, respectively, and the fine adjustment driving means is based on revolving a planetary gear of the operating gear device. Since it performs control, it is possible to obtain extremely small changes in the output shaft rotation speed in response to changes in the rotation speed of the fine adjustment drive means, and as a result, it is possible to control the rotation speed with extremely high accuracy based on a relatively simple structure. It is becoming.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, so FIG. 1 is a diagram schematically showing a conveyance device equipped with a conveyance control device, FIG. 2 is a block diagram showing the control mechanism of the conveyance control device, and FIG. 3 is a diagram showing the operation of the conveyance control device. FIG. 4 is a longitudinal side view of the gear device, and is a sectional view taken along the line X--X in FIG. 3. DESCRIPTION OF SYMBOLS 1... Drive shaft, 3... Operating gear device, 4... Drive motor for fine adjustment, 5... Tension detection means, 30...
...Input shaft, 31...Output shaft, 33, 34...Sun gear, 35, 36...Planetary gear, 60...Target value setting section, 61...Comparison calculation section.

Claims (1)

[Claims] 1 A long flexible material conveyance control device for conveying a long flexible material under a predetermined tension with a plurality of conveyance rolls, which is connected to a common drive source for the plurality of conveyance rolls. a common drive unit, and an actuating gear device disposed for at least one of the conveying rolls, with the shafts of a pair of sun gears as input and output shafts, respectively, and the input shafts are connected to the drive unit. The operating gear device is capable of connecting the output shaft to the conveyance roll, a tension detection means for detecting tension in a flexible material between adjacent conveyance rolls, and a flexible material between the adjacent conveyance rolls. a target value setting means for storing a set target value of tension; a comparison calculation means for comparing the tension detected by the tension detection means with the target value and generating an output signal according to the difference; and a fine adjustment driving means for rotating the planetary gear of the operating gear device around the input shaft or the output shaft at a rotation speed corresponding to the output of the conveyance of a long flexible material. Control device.