JPS6137651A - Expand/contract position controller for support roller of spiral looper - Google Patents

Abstract

PURPOSE:To protect a strip from surface flaw by providing a controller for controlling the position of support roller such that the difference between the operated value and the actually measured value of the radial position of support roller will be zero thereby minimizing the slip between the coils. CONSTITUTION:Feed-in length, feed-out length of strip and the rotary angle of drum are detected respectively through detectors. On the basis of the detected level, CPU will operate the radius position of support roller. While the difference between the actually measured radius position of support roller and said operated value is operated. A control signal corresponding with said difference is fedback through a controller to a hydraulic circuit for moving the support roller to perform expand/contract control of support roller such that the difference will be zero and to minimize the mutual strip of coil. Consequently, surface flaw caused from slip can be prevented effectively.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a spiral louver that accumulates a large volume of strips, and more particularly, to a spiral louver that can expand and contract the position of its support roller with high precision. The present invention relates to a control device configured as described above.

[Background of the invention]

Conventionally, in a horizontal shaft type spiral louver, there is a method for controlling the expansion and contraction of support rollers that suppresses the slip between the IJ knobs to a very small value and enables smooth operation without impairing the surface quality. is known (US Pat. No. 42,881).

In this known example, the support rollers are not actively expanded or contracted. An example of actively expanding and contracting the support roller is Japanese Patent Application No. 18800/1985 filed by the present applicant. Further, as an example in which this support roller expansion/contraction mechanism is taken out from the drum shaft, there is Japanese Patent Application No. 58-165179, also filed by the present applicant. However, with these techniques for expanding and contracting support rollers, there is a problem in that a slip phenomenon often occurs on the strip, and surface scratches occur on the IJ knob.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve this problem and provide a support roller expansion/contraction position control device for a spiral looper that can control expansion/contraction of the support roller position with high precision without causing slippage in the strip. be.

[Summary of the invention]

When the spiral looper is used to actively expand and contract the image,
The conditions necessary for the spiral looper to exhibit the necessary performance and perform practical operation will be explained with reference to FIG.

The strip 1 enters the spiral looper via the input pinch roller 2 and is wound onto the input support roller 4 to form the input coil 3. Next, it passes through the inside of the inlet coil 3, passes over small-diameter rollers 5 arranged in an S-shape, and is wound on the outlet support roller 7 to form the outlet coil 6. From the outside of the output coil 6, the strip passes through an output pinch roller 8 and exits the spiral looper. In this way, the strips are accumulated in a coil shape on the exit side.If the drum shaft 9, which includes the maple S-shaped edge curl turn, rotates clockwise, the amount of accumulation increases, and vice versa. If it rotates, the amount of storage will decrease.

During the operation of the spiral looper, the support roller 4.7 is attached to the drum shaft 9 in order to prevent the strips from slipping between each other in the exit coil and because the strips are wound tightly under tension. It is necessary to expand and contract in the radial direction. Figure 8 shows the relationship.

In order for the person and the output coil to rotate as one, the following relationship needs to hold.

・・・・・・・・・(1) Here, R*1: Outer radius of the input support roller R++2:
Entry side support roller inner radius Rn1: Output side support roller inner radius Ra2: Output side support roller outer radius h Nislip plate thickness vE Nistrip entrance speed vD Nisstrip exit speed or satisfies the following equation obtained by integrating the above equation There is a need to.

Here, θ is the drum rotation angle, and LR and tn are the feeding length and feeding length of the louver strip, respectively, and are expressed by the following equation.

6°: 1 V, -at ++, ++-+
:+t3) Lo = f VD-d t Therefore, the expansion and contraction of the input side support roller 4 and the output side support roller 7 is as follows:
Calculation is performed using the following equation obtained from equation (2), and each calculated value is compared with an actual value measured by a detector at the support roller radial position, so that the deviation can be controlled to zero.

The above conditions are such that the coiled strips do not slip against each other. If slip occurs, surface scratches will occur on the strip, significantly reducing product value, and depending on the strip being handled, it may become a defective product. . The slip that is normally allowed is about 0.2 or less. For example, if there is an error of ΔR12 in Bx2, the slip εP is expressed by the following equation. Therefore, the allowable error ΔRIez is the following value.

In the normally used spiral louver, 'fL11+2 is about 1 to 2 m, so ΔRt2=gpX几g2= 0.2 X 10-''
(1"i x 10' = 2~(l...
(6) This value must be satisfied under any conditions during line operation.

[Embodiments of the invention]

The entry side of the support roller expansion/contraction mechanism according to the embodiment of the present invention will be described. The exit side has exactly the same structure.

In FIG. 1, the support roller 4 is supported via a rack 11 and a pinion 12 by a large gear 13 slidably attached to a face plate 15 of the drum shaft 9. As shown in FIG. The support roller 4 is attached to a rod 29 to which a rack 11 is attached, as shown in FIG. The shaft of the binion 12 is the face plate 1
The outer circumference of the large gear 13 meshes with the gear 24, and the inner circumference of the large gear 13 meshes with the pinion 12.

Therefore, as the large gear 13 rotates relative to the face plate 15, the support roller 4 expands and contracts in the radial direction of the ram shaft.

This 130-rotation drive system will be explained with reference to FIGS. 1 to 4. The rotation of the face plate 15 is controlled by gears 17, 18 .
It is connected to a planetary gear mechanism 21 via 19. The outer cylindrical portion of this planetary gear 21 meshes with the gear 22, and the shaft 23
, are connected to the large gear 13 via the gear 24. One shaft 25 of the planetary gear is connected to an expansion/contraction cylinder 28 via a pinion 26 and a rack 27. The gear ratio of this drive system is determined as follows. From the face plate 15 to gears 17, 18, 19, planetary gear 21, gear 22° 24.1
The continuous ratio up to 3 is such that the drum shaft and the large gear 13 advance at exactly the same rate. Therefore, expansion cylinder 2
8 does not make a stroke, the large gear 13 does not rotate relative to the face plate 15, and therefore the support roller 4 does not move in the radial direction of the drum shaft. In order to move this support roller 4, it is sufficient to stroke the expansion/contraction cylinder 28 and rotate one shaft 25 of the planetary gear 21. The gear system ratio on the expansion/contraction cylinder 28 side may be determined so that the required stroke of the support roller 4 corresponds to the entire stroke of the expansion/contraction cylinder. drum shaft 9
is connected to an electric motor 32 via a gear box 31,
By applying rotational torque to the drum, the tension of the spiral looper and the exit strip can be maintained.

Next, the hydraulic and electrical control systems for the expansion/contraction cylinder 28 will be explained. In FIG. 5, the expansion/contraction cylinder 28 is connected to a hydraulic power source P via a switching valve 41 and a pressure regulating valve 42.

Further, the switching valve 41 is connected to the tank T via a pressure regulating valve 44 and a flow regulating valve 45, and on the other hand, it is connected from the P side to the T side via a flow regulating valve 43. A certain amount of flow is passed in a bypass manner. Since the position of the support roller 4 is completely proportional to the expansion/contraction cylinder 28, it is only necessary to control the position of the expansion/contraction cylinder 28.

Next, the method will be explained. The strip feed length Lg is determined by a rotation detector 61 attached to the input pinch roller 2 shown in FIG.
The rotation angle θ is measured by the detector 63 shown in FIG. Further, the radial position of the support roller 4 can be obtained by detecting the displacement of the expansion/contraction cylinder 28 with the detector 64. The computer (CPU) 49 determines the radial positions R and 2 of the support rollers 4 and 7 using equations (2) and (3).
．． At the same time as calculating R+H, it is compared with the actual measurement value of the displacement of the expansion/contraction cylinder 28, and its deviation is also calculated. A control signal commensurate with this deviation amount is sent to the hydraulic controller 48,
The flow rate of the flow rate adjustment valve 45 is controlled. In the hydraulic circuit shown in FIG. 5, since oil is always supplied from the P side to the T side by the binox circuit, the flow rate of the flow rate adjustment valve 45 can be throttled even when the expansion/contraction cylinder 28 has an automatic stroke. This allows the expansion/contraction cylinder 28 to be moved in either direction. Furthermore, equation (2) and (3)
The configuration is such that the data necessary for calculating the formula can be input from the keyboard 50. Further, in the hydraulic circuit shown in FIG. 5, the pressure of pressure control valves 42, 44 can be controlled by hydraulic controllers 46, 47 to prevent the output of the expansion/contraction cylinder from becoming excessive or insufficient. FIG. 6 shows the control system of FIG. 5.

In the above description of the embodiment, a hydraulic cylinder is used as the drive source for the expansion/contraction system, but it is clear that the same expansion/contraction movement of the support roller can be obtained even if this cylinder is used as an electric motor to directly drive the pinion 26. . It will also be clear that the stroke of the expansion cylinder is then expressed in terms of the rotation angle of this pinion 26.

〔Effect of the invention〕

As is clear from the detailed description above, according to the present invention, the expansion and contraction of the support rollers required for the spiral looper can be controlled with high precision to minimize mutual slip between the coils, and Scratches can be effectively prevented, high speed, large capacity spiral roux,
The effects are extremely large, such as making it possible to realize <.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the support o-ra expansion/retraction device of the Snow Looper according to the embodiment of the present invention, Fig. 2 is a detailed view showing the installation state of the support roller, and Fig. 3 is a detailed view showing the installation state of the support roller. FIG. 4 is a schematic diagram showing a power transmission system, FIG. 5 is a diagram showing a support roller expansion/contraction control device according to an embodiment of the present invention, and FIG. 6 is a diagram showing its electrical control system. , FIG. 7 is a diagram for explaining the functions of the spiral looper, and FIG. 8 is a diagram for explaining the operating parameters of the spiral looper. 1... Band-shaped object (strip), 3... Inlet coil,
4... Inlet side support roller, 6... Outlet side coil, 7
...Exit side support roller, 28...Expansion cylinder,
46-48... Hydraulic controller, 49... Arithmetic unit (CPU), 61-64... Detector.

Claims (1)

[Claims] 1. A first device and a second device that form a first coil and a second coil, respectively, while winding a moving strip; In a support roller expansion/contraction position control device for a spiral looper, the support roller expansion/contraction position control device is comprised of a device for pulling out a strip in a spiral shape from two coils, and the radius of the support roller supporting each coil can be moved by a hydraulic circuit. a detection device that detects each of the length, feed length, and rotation angle of the drum; and a detection device that calculates the radial position of the support roller based on the detected values, and combines the calculated value with the actual measured value of the radial position of the support roller. Equipped with a calculation device that calculates the deviation,
A support roller expansion/contraction position control device for a spiral looper, comprising a control device that controls the position of the support roller by feeding back to the support roller movement hydraulic circuit so as to make the deviation value zero. 2. Radial position R_E_2, R_D of the support roller
_2 is a support roller expansion/contraction position control device for a spiral looper according to claim 1, wherein _2 is calculated by the following equation. R_E_2=√(R_E_1_0^2+h/π・l_R
-θ/[2π]h)R_D_2=√(R_D_1_0^
2-h/π・l_D-θ/[2π]h) However, R_R_1_0: Initial position of the outer radius of the inlet support roller R_D_1_0: Initial position of the outer radius of the outlet support roller h: Thickness of the strip l_E: Thickness of the strip Feeding length l_D: Feeding length θ of the strip material: Rotation angle of the drum