JPS63277169A - Conveyor controller for long flexible material - Google Patents

Abstract

PURPOSE:To make highly accurate speed control performable with a relatively simple structure by revolving a planetary gear of a differential gear mechanism according to a difference between the tension and the desired value detected by a tension detecting device, with a fine adjustment driving device. CONSTITUTION:A long flexible material S is conveyed by conveyor rolls A-N driven by a common drive source M, but tension between these rolls and the next conveyor roll is detected by a dancer roll 50 and a position detector 51, or a tension detecting element 5 consisting of three rolls 52-54, and it is compared with a desired value 60 by a comparing operational part 61, then the deviation signal is outputted to a control part 40 of a fine adjusting control motor 4. And, this motor 4 revolves a planetary gear of a differential gear mechanism 3 and finely adjusts the rotation of an output shaft 31 to an input shaft 30, keeping the tension constant. Thus highly accurate speed control can be done with a relatively simple structure.

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 ART AND PROBLEMS THEREOF As a conveyance control device for a long flexible material, a sectional drive in which a drive source is provided individually for each group of conveyance rolls is often employed. 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. It is necessary to control each drive motor etc. over a wide range of conditions, and it is difficult to control such a wide range with high precision, making the control device unavoidably complicated. Also, in control during steady operation,
Mutual cooperation between the transport sections is not desirable in terms of control accuracy, and there is a problem in that the apparatus becomes even more complex when cooperative control is attempted.

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. Tension detection for detecting the tension in the flexible material between the operating gear device, which is a gear device, and the human power shaft is connected to the drive unit, and the output shaft is connectable to the conveyance roll, and adjacent conveyance rolls. means, a target value setting means for storing a set target value of the flexible monthly tension between the adjacent conveying rolls, and comparing the tension detected by the tension detecting means with the target value and responding to the difference therebetween. and a fine adjustment drive means for rotating a planetary gear of the operating gear device around the input shaft or the 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, which is characterized by:

Example Embodiments of the present invention will be described below 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 has conveyance rolls (A), (B), ... (
N) and a drive source (M) common to these conveyance rolls, and constitute a conveyance device for a long flexible material as a whole. One drive shaft (1) for common drive source (M)
A drive shaft (1) is connected to a power supply shaft to each transport roll via a suitable transmission means such as a bevel gear. For example, for the transport roll (B), an operating gear device (3) is arranged between the drive shaft (1) and the transport roll (B), and the operating gear device (3) receives a pair of sun gears as input. The human power shaft (30) is connected to the drive shaft (1), and the output shaft (31) is connected to the conveyor roll (B).
It is connected to the.

The planetary gears of the operating gear system (3) are driven by a common drive source (M).
It is rotated by a fine adjustment control motor (4) provided separately from the motor.

The detailed structure of the operating gear device (3) will be explained later.

A tension sensing means (5) made of flexible material is provided between adjacent transport rolls (A) and (B). This tension detection means (5) is made of a flexible material (S), for example, as shown in the figure.
) is supported in a suspended state by a dancer roll (5
0) and a position detection device (51) for detecting the position of the dancer roll. Alternatively, as illustrated for the transport roll (N), the flexible member is supported from above and below by three rolls (52), (53), and (54) spaced apart, and the middle roll (53) is Appropriate means can be employed, such as a tension detection means (5) that detects the tension of the flexible material from the pressure.

Hereinafter, explanation will be made regarding the relationship between the transport 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 the set target value of the flexible member tension between the adjacent rolls (A) and (B).

The comparison calculation section (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 fine adjustment control motor (4),
The control unit (40) rotates the planetary gear of the operating gear device (3) at the input shaft (
30) and the drive unit of the control motor (4) to revolve around the output shaft (31).

The operating gear device (3) has the following structure. As shown in FIGS. 3 and 4, the input shaft (30) and the output shaft (31) extend into the casing through sleeves of the casing (32), each having a sun gear (33) and ( 3
4).

The sun gears (33) and (34) each have a planetary gear (35).
) and (36) are meshed. 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 each movably supported by the casing (32), and the input shaft (30) and output shaft (31) are loosely passed through the center, and are mutually connected by the body plate (38). are integrally connected to each other. A large gear (370) is fixed to the outer surface of one of the support plates (37), a worm (39) meshes with the large gear, and the shaft of the worm is attached to the casing (370).
32) and is connected to the fine adjustment drive motor (4).

The number of rotations of the input shaft (30) and large gear (370) are each n3.
0”3□. From the operating principle of the operating gear, the output shaft (
The rotation speed 03□ of 31) is determined by the formula. Here, 30 31 3□. : Number of rotations with the specific rotation direction being positive Z33: Number of teeth of the sun gear (33) Z34: Number of teeth of the sun gear (34) Z35: Number of teeth of the planetary gear (35) Z36: Number of teeth of the planetary gear (36) It is. Therefore, by approximating the number of teeth between the sun gears and the planetary gears, extremely small changes in the rotational speed of the large gear (370) can be achieved on the output shaft (31).
It becomes possible to make it grow.

For example, Z -31, Z34=33, Z35=33, 7
If 36=31 and n3o=180Orpm, then n
3l-1588,43 +n Xo, 117539. Assuming that the gear ratio between the worms (three) and the large gear (370) is 1=50, the rotation speed of the output shaft (31) will be as follows when the rotation speed control range of the control motor (4) is from 0 to ±1100 rpm. ±0.235rpm.

The rotation speed control width of the control motor (4) is 0 to ±200Qrp
m, the rotation speed becomes ±4.7 rpm, and extremely small rotational speed control is performed on the control value of the control motor (4). Since rolls of equal diameter are used, rolls (A) and (B
) If it is necessary to make the mutual rotational speeds substantially the same, it is preferable to insert a speed change gear into the manual shaft (30) or output shaft (31) of the roll (B). In this example, the transmission ratio is 34/3
When using a speed increasing gear of 0 and inserting it into the input shaft (30), n3□-1800,22 +n can get.

In this way, the output shaft (31) is controlled by the large gear (370).
) can control the rotation speed with extremely high precision.

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 performed on other transport rolls as well. Of course, this control does not necessarily have to be performed on all conveyance rolls, but is performed on necessary conveyance 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 example, power from a common drive shaft (1) is transmitted through a continuously variable transmission for the revolution of the planetary gears, and Various drive forms can be employed, such as the transmission ratio of the continuously variable 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,
When tension control is required during this drive, the fine adjustment drive means only needs to rotate as much as necessary for the control, so the control range is narrow, 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 a human power shaft and an output shaft, respectively, and the fine adjustment drive 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 becomes.

[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 a control mechanism of the conveyance control device, and FIG. 3 is an operation diagram. 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. (1)...Drive shaft (3)...Operating gear device (4)...Fine adjustment drive motor (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 (hereinafter referred to as "2") ) -・-,7 Figure 3

Claims (1)

[Claims] (1) A long flexible material conveyance control device for conveying a long flexible material under a predetermined tension using a plurality of conveyance rolls, which uses a common drive source for the plurality of conveyance rolls. a common drive unit to be connected, and an actuating gear device disposed for at least one of the conveyor 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 actuating gear device connected so that the output shaft can be connected 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 the tension of the elastic material; 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 the comparison calculation means. 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 according to the output from the means. transport control device.