JP2020063151A - Guide roll - Google Patents

Abstract

To provide a guide roll that can rotate with a running web.SOLUTION: A roll main body 12 transports a web W, and a right and left pair of rotational shafts 14, 16 protrude from the right and left sides of the roll main body 12. A wind turbine 26 is anchored coaxially with the roll main body 12, and a nozzle 32 blows air out to the wind turbine 26. A rotation detection part 36 detects the rotation speed of the roll main body 12. When the detected rotation speed is slow, the nozzle 32 blows air out.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a guide roll.

  A guide roll is provided for guiding a long web along a predetermined transport path when the web is processed while running. This guide roll is passive and rotates by the force of the traveling web.

JP, 2008-24525, A

  However, there is a problem in that the guide roll does not rotate together with the web depending on conditions such as the angle of the guide roll holding the web, the tension of the web, the material of the web, and the like, which may damage the web.

  In view of the above problems, it is an object of the present invention to provide a guide roll that can rotate together with a traveling web.

  The present invention provides a roll body for transporting a web, a pair of left and right rotating shafts projecting from the left and right sides of the roll body, a wind turbine fixed coaxially with the roll body, and a pair of left and right rotating shafts rotatably supported. A pair of left and right bearing portions, a blowing portion having a nozzle that blows gas to the wind turbine, a rotation detection portion that detects the rotation speed of the roll body, and the rotation speed that the rotation detection portion detects is low, A control unit that controls to blow out gas from the nozzle.

  According to the present invention, when the rotation speed of the roll main body is low, the gas can be blown from the nozzle to rotate the web in accordance with the traveling speed of the web.

It is a front view of the guide roll which shows one Embodiment of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a block diagram of a guide roll.

Hereinafter, the guide roll 10 of the web W according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4. The long web W is, for example, a film, metal foil, paper, cloth or the like.
(1) Structure of Guide Roll 10 The structure of the guide roll 10 will be described with reference to FIGS.

  As shown in FIG. 1, the roll body 12 that is the body of the guide roll 10 is a roll made of metal such as aluminum. The roll body 12 holds the web W and guides it, and the roll body 12 is a passive movement that is not directly driven by a motor.

  As shown in FIG. 1, a wind turbine 26 having the same diameter as the roll body 12 is coaxially fixed to the right side surface of the roll body 12. The wind turbine 26 is provided with a plurality of blades 28 as shown in FIG. One nozzle 32 for injecting air at a predetermined pressure is provided at a predetermined distance from the outer circumference of the wind turbine 26. The air blown from the nozzle 32 hits the blade 28 and rotates the roll body 12 together with the wind turbine 26.

  A pair of left and right rotating shafts 14 and 16 project from the left and right side surfaces of the roll body 12. The right rotating shaft 14 penetrates the wind turbine 26 or projects from the wind turbine 26 fixed to the right side surface of the roll body 12. The rotating shafts 14 and 16 are horizontally and rotatably supported by a pair of left and right bearings 18 and 20 via bearings 22 and 24.

  A marker 30 is provided on the right end of the outer circumference of the roll body 12. Further, a sensor 34 is provided above the right end of the roll body 12 to detect the marker 30 rotating with the roll body 12.

(2) Electrical Configuration of Guide Roll 10 First, the electrical configuration of the guide roll 10 will be described with reference to the block diagram of FIG. As shown in FIG. 4, the rotation detection unit 36 and the blowing unit 38 are connected to the control unit 42 of the guide roll 10. The rotation detection unit 36 includes the marker 30 and the sensor 34. The blowing section 38 includes a nozzle 32 and an electropneumatic conversion section 40.

(3) Method of controlling rotation speed of guide roll 10 Next, a method of controlling the rotation speed of the guide roll 10 will be described.

  The sensor 34 detects the marker 30 that rotates with the roll body 12, and the control unit 42 obtains the detected rotation speed V1 from the rotation cycle T that is the detection interval of the marker 30 and the radius r of the roll body 12. The detected rotation speed V1 is V1 = 2πr / T.

  After obtaining the detected rotation speed V1, the control unit 42 compares the detected rotation speed V1 with a predetermined set rotation speed V0 and obtains a difference ΔV = V0−V1. The set rotation speed V0 is the same as the traveling speed V0 of the web W. That is, if the rotation speed of the outer circumference of the roll body 12 is the same as the traveling speed V0 of the web W, the set rotation speed V0 does not cause scratches or wrinkles on the web W held by the roll body 12. . The control unit 42 outputs this difference ΔV to the electropneumatic conversion unit 40.

  When the difference ΔV = 0, the electropneumatic conversion unit 40 sets the pressure P of the air blown from the nozzle 32 to 0 and stops the blowing of the air from the nozzle 32. Then, the air is blown out from the nozzle 32 so that the pressure P increases gradually from the pressure P = 0 as the difference ΔV (> 0) increases. This increases the rotational speed of the wind turbine 26.

  Then, when the rotation speed rises and the rotation speed V1 detected by the marker 30 detected by the sensor 34 reaches the set rotation speed V0 and ΔV = 0, feedback control is performed to stop the air blowing from the nozzle 32. To execute.

  Since the passive roll body 12 does not rotate faster than the traveling speed V0 of the web W, ΔV = V0−V1 <0 does not hold.

(4) Effects According to the present embodiment, when the rotation speed of the roll body 12 is slow, the pressure P of the air blown from the nozzle 32 increases, so that the rotation speeds of the wind turbine 26 and the roll body 12 increase, and the web. Since the feedback control is executed so as to be the same as the traveling speed V0 of W, the web W is not scratched or wrinkled.

  When the rotation speed of the roll body 12 is the same as the traveling speed of the web W (ΔV = 0), the air blown from the nozzles 32 is stopped, so that the roll body 12 follows the traveling speed of the web W. Can rotate.

  Further, since the roll main body 12 is made of metal and is lightweight, air can be blown to the wind turbine 26 to surely rotate it.

(5) Modification Example In the above embodiment, the air from the nozzle 32 is stopped when the difference ΔV = 0, but instead of this, when the difference ΔV = 0, the pressure P of the air to be blown out is set in advance. The set pressure P0 is set, and air is blown out from the nozzle 32. Then, the air is blown out from the nozzle 32 so that the pressure P gradually increases from P0 as the difference ΔV (> 0) increases. According to this, not only can the web W rotate in accordance with the traveling speed of the web W, but even if the traveling speed and the tension of the web W are slightly changed, the roll body 12 can rotate without being affected by the change.

  Further, in the above-described embodiment, the wind turbine 26 is provided on the right side surface of the roll body 12, but instead of this, it may be provided on the left side surface. Further, the wind turbine 26 is provided on both left and right side surfaces of the roll body 12, respectively. The nozzle 32 that blows out air may be provided in the wind turbine 26.

  Further, in the above-described embodiment, the wind turbine 26 has the same diameter as the roll main body 12, but instead, the wind turbine 26 may be larger or smaller than the roll main body 12 in diameter.

  Further, in the above embodiment, the number of the nozzle 32 that blows air to the wind turbine 26 is one, but instead of this, a predetermined angle may be opened to blow air to the wind turbine 26 from the plurality of nozzles 32. Thereby, even if the roll body 12 is heavy, it can be reliably rotated.

  Although the roll body 12 is made of metal in the above embodiment, it may be made of rubber instead.

  In the above embodiment, the gas blown out from the nozzle 32 is air, but other gas may be used depending on the working atmosphere.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

10 ... Guide roll, 12 ... Roll body, 14 ... Rotating shaft, 16 ... Rotating shaft, 18 ... Bearing, 20 ... Bearing, 26 ... Wind turbine, 28 ... Wings, 30 ... Markers, 32 ... Nozzles, 34 ... Sensors, 36 ... Rotation detecting sections, 38 ... Blowing sections, 40 ... Electropneumatic converting sections, 42 ... Control sections

Claims (10)

A roll body that conveys the web,
A pair of left and right rotating shafts protruding from both left and right sides of the roll body,
A windmill fixed coaxially with the roll body,
A pair of left and right bearing portions that rotatably support the pair of left and right rotating shafts,
A blowing unit having a nozzle that blows gas to the wind turbine,
A rotation detector for detecting the rotation speed of the roll body,
When the rotation speed detected by the rotation detection unit is slow, a control unit that controls to blow out gas from the nozzle,
With a guide roll. The control unit is
When the rotation speed detected by the rotation detection unit is slower than a predetermined set rotation speed, the pressure of the air blown from the nozzle is increased,
The guide roll according to claim 1. The control unit is
When the rotation speed detected by the rotation detection unit is the same as the set rotation speed, the blowing of air from the nozzle is stopped,
The guide roll according to claim 2. The control unit is
When the rotation speed detected by the rotation detection unit is the same as the set rotation speed, air is blown out at a predetermined pressure,
The guide roll according to claim 2. The rotation detector is
A marker provided on the outer periphery of the roll body,
A sensor for detecting the marker,
Have
The control unit obtains the rotation speed from a rotation cycle in which the sensor detects the marker,
The guide roll according to claim 1. The wind turbine and the nozzle are provided on only one of the left and right sides of the roll body,
The guide roll according to claim 1. The wind turbine and the nozzle are respectively provided on both left and right sides of the roll body,
The guide roll according to claim 1. Blow out gas from the one nozzle to the windmill,
The guide roll according to claim 1. Blowing gas from the plurality of nozzles to the wind turbine,
The guide roll according to claim 1. The roll body is made of metal,
The guide roll according to claim 1.

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