JPH05178505A - Contact roll device - Google Patents

Abstract

PURPOSE:To provide a contact roll device capable of maintaining the good winding state of a web around a winding shaft. CONSTITUTION:In a contact roll device 10, right and left bending force applying cylinder devices 17A and 17B are operated to cause each of right and left control shafts 16A and 16B to bend, thereby applying desired curvature to a contact roll 12 supported on each of the shafts 16A and 16B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact roll device for pressing a contact roll onto a winding shaft for winding a web of plastic film, metal foil, paper or the like.

[0002]

2. Description of the Related Art A conventional contact roll device rotatably supports left and right ends of a cylindrical contact roll arranged in parallel with a take-up shaft on left and right movable frames, and each movable frame is taken as a take-up shaft. The pressure cylinder device is configured to be movable in the direction of coming in and out of contact with the pressure cylinder device.

When the web is wound around the winding shaft, the contact roll is pressed against the web around the winding shaft by the operation of the pressurizing cylinder device, and the web is wound around the winding shaft from the start region to the web. Drive out the air that gets caught. As a result, the amount of air trapped between the wound webs is reduced or equalized, and the web winding appearance is improved.

[0004]

However, in the contact roll apparatus, the amount Q of air trapped between the webs is proportional to d ^2/3 when the diameter of the contact roll is d. Therefore, the smaller the diameter of the contact roll, the better.

However, the contact roll is a long tubular body having a diameter of 200 to 300 mm and a length of 6 to 8 m, for example. Therefore, when both ends of the contact roll are pressed toward the take-up shaft by the operation of the pressurizing cylinder device, only both ends of the contact roll contact the circumference of the take-up shaft, and the central part of the contact roll separates from the take-up shaft. It bends like a bow curve. For this reason, the central part of the contact roll cannot be pressed into contact with the web around the winding shaft, and the amount of air trapped in this part becomes excessive, which causes a disadvantage that a defective winding shape is likely to occur.

Further, the contact roll, while being pivotally supported by the left and right movable frames, is pressed against the web around the winding shaft while being pivoted by an external drive source. At this time, as a result of the rotation resistance of the rotation support system acting on the contact roll, this rotation resistance affects the web winding force around the winding shaft, resulting in a poor winding shape.

It is an object of the present invention to provide a contact roll device which makes it possible to wind a web around a winding shaft in a good condition.

[0008]

According to a first aspect of the present invention, there is provided a contact roll apparatus for contacting a contact roll, which is arranged in parallel with a take-up shaft and rotates, with a web wound around the take-up shaft. , The left and right movable frames which are guided by the left and right guides provided on the gantry so as to be movable in the direction of approaching and separating from the winding shaft, and the movable frames which are movable as described above. The pressure device and a fulcrum bearing provided on each of the left and right movable frames are rotatably supported, and a portion extending from the corresponding movable frame is used as a support shaft portion. Each of the left and right control shafts for rotatably supporting each of them is provided with each of the left and right bending force applying devices that are supported by the left and right movable frames and apply the bending force around the fulcrum bearing to each of the left and right control shafts. And left and right bending force applying equipment Causing bending in each control axes of the right and left by, is obtained by the so allowed to impart a desired bending curve contact roller supported by the respective control axes.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the bending forces applied to the left and right control shafts by the left and right bending force applying devices can be set independently of each other. It is the one.

According to a third aspect of the present invention, in addition to the first aspect of the present invention, the rotational support structure of each of the left and right control devices is bilaterally symmetric, and only one of the control shafts is driven by an external drive source. It is designed to be drivable.

[0011]

According to the present invention, the following effects are obtained. When the left and right bending force applying devices bend the left and right control shafts, and the tips of the support parts of the respective control shafts are pushed and displaced so that they come close to the winding shaft side, the contact roll becomes the support shaft of each control shaft. Due to the above-mentioned bulging displacement of the tip of the part, a bending curve is provided so as to bring the central part closer to the winding shaft side. As a result, when both ends of the contact roll having the above-mentioned bending curve are pressed toward the take-up shaft by the operation of the pressurizing device, the both ends and the central part of the contact roll are completely parallel to the take-up shaft. By copying, the entire area of the winding shaft in the width direction is evenly contacted. Therefore, the amount of air trapped between the webs is reduced or equalized over the entire widthwise direction of the winding shaft, and the web winding shape is improved.

By setting the bending forces applied by the left and right bending force applying devices to the left and right control shafts independently of each other,
The bending curve given to the contact roll can be adjusted by the above. As a result, it is possible to adjust the air entrapped state between the webs in the width direction of the take-up shaft, and improve the web winding appearance.

The rotational resistance of the contact roll support system can be eliminated by making the rotational support structure of the left and right control shafts symmetrical and allowing only one of the control shafts to be driven by an external drive source. That is, the rotational resistance (A) around one control axis that is driven by an external driving force
Can be canceled by the rotational resistance (B) around the other control axis that is not driven, and as a result, the rotational resistance of the contact roll support system can be eliminated. As a result, the contact roll rotates without affecting the web winding force around the winding shaft, and the web winding form is improved.

[0014]

1 is a front view showing a contact roll device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a schematic view showing the contact roll device.

The contact roll device 10 comprises a winding shaft 11
When winding the web 1 onto the winding shaft 11, the contact roll 12 arranged in parallel with the winding shaft 11 and rotating is pressed against the web 1 wound around the winding shaft 11 to start winding the web around the winding shaft 11. The air trapped between the webs 1 is expelled from the area. Then, the amount of air trapped between the wound webs 1 is reduced or equalized, and the web winding shape is improved. The winding shaft 11 is forcibly rotated by a drive motor (not shown).

At this time, the contact roll device 10 is
Frame 13, left and right movable frames 14A and 14B, left and right pressure cylinder devices 15A and 15B, left and right control shafts 16A and 16B, and left and right bending force imparting cylinder devices 17
It is configured to have A, 17B and the like.

The left and right movable frames 14A and 14B are
The support brackets 20A and 20B fixed to the frame 13 are guided by two left and right guide rods 21A and 21B, respectively, and are movable in a direction in which the take-up shaft 11 is moved toward and away from the take-up shaft 11.

Left and right pressurizing cylinder devices 15A, 15B
Is connected to the left and right movable frames 14A and 14B,
The movable frames 14A and 14B can be moved as described above.

The left and right control shafts 16A, 16B are fulcrum bearings 22 provided on the left and right movable frames 14A, 14B.
Portions that are rotatably supported by A and 22B and that extend from the corresponding movable frames 14A and 14B are the support shaft portions 23A and 2A.
3B, the support shafts 23A and 23B are provided with bearings 24A and 25 on the left and right sides of the cylindrical contact roll 12, respectively.
It is rotatably supported via A, 24B and 25B.

At this time, the left and right control shafts 16A, 16B
The rotational support structure is symmetrical and the drive shaft 27 is connected to one control shaft 16A via a universal joint 26A. The drive shaft 27 is rotatably supported on the mount 13 via bearings 28 and 29, and can be driven by an external drive motor 30.

Left and right bending force applying cylinder devices 17A,
17B is supported by the left and right movable frames 14A and 14B, and the fulcrum bearing 22 is attached to the left and right control shafts 16A and 16B.
A bending force is applied in the horizontal plane around A and 22B. Specifically, each bending force application cylinder device 17A, 17B,
One end of the rocking lever 31 is pin-coupled to the corresponding movable frames 14A and 14B by a pin 101, and the other end is pinned to the corresponding movable frames 14A and 14B by a pin 102. It is pin-connected by the pin 103. Then, each control shaft 16A, 1
The bending bearings 32A and 32B provided around the base end portion of 6B are
The pin 104 is pin-coupled to the intermediate portion of the swing lever 31. Therefore, each bending force applying cylinder device 1
The pressing force of 7A, 17B is transmitted to the bending bearings 32A, 32B via the swing lever 31, and by extension, the control shafts 16A, 16B.
The bending force is applied to A and 16B in the horizontal plane around the fulcrum bearings 22A and 22B.

As a result, in the contact roll device 10, the left and right bending force applying cylinder devices 17A, 1
7B causes the left and right control shafts 16A, 16B to bend, and the contact roll 12 supported by the control shafts 16A, 16B is given a bending curve.

At this time, the left and right bending force applying cylinder devices 17A and 17B are driven and controlled independently of each other, and the bending forces applied to the left and right control shafts 16A and 16B can be set independently of each other.

Further, self-weight deflection correcting screws 33A and 33B are screwed to the movable frames 14A and 14B in the vertical direction. The correction screws 33A and 33B are respectively attached to the control shafts 16A and 16B via bearings 34A and 34B mounted around the base ends of the control shafts 16A and 16B.
A bending force is applied within the vertical plane around the fulcrum bearings 22A and 22B. This bending force corrects the deflection of the contact roll 12 due to its own weight within the vertical plane.

The contact roll 12 has the control shaft 1 driven by the external drive motor 30 at the rotation start stage.
The rotation speed that matches the moving speed of the web is imparted by turning around to 6A, and thereafter, the control shaft 16A and the web 1
By rotating to both sides, the rotation speed that matches the web moving speed is maintained.

The operation of this embodiment will be described below. Bending is generated in the left and right control shafts 16A and 16B by the left and right bending force applying cylinder devices 17A and 17B,
When the tips of the support portions 23A and 23B of the control shafts 16A and 16B are pulled and displaced so as to approach the winding shaft 11 side,
The contact roll 12 is given a bending curve such that the central portion of the contact roll 12 is brought closer to the winding shaft 11 side by the above-mentioned protruding displacement of the support shaft portions 23A and 23B of the control shafts 16A and 16B. As a result, when both end portions of the contact roll 12 having the above-described bending curve are pressed toward the winding shaft 11 by the operation of the pressurizing cylinder devices 15A and 15B, both end portions and the central portion of the contact roll 12 are entirely removed. It follows the winding shaft 11 in a completely parallel manner, and evenly contacts the entire region of the winding shaft 11 in the width direction. Therefore, the amount of air trapped between the webs 1 is reduced or equalized in the entire widthwise direction of the winding shaft 11, and the winding shape of the web 1 is improved.

Left and right bending force applying cylinder devices 17
By setting the bending forces applied to the left and right control shafts by A and 17B independently of each other, the contact roll 1
The bending curve given to 2 can be adjusted. As a result, the air entrapped state between the webs 1 can be adjusted in the width direction of the take-up shaft 11, and the web 1 winding appearance is improved.

By supporting the left and right control shafts 16A and 16B in a rotationally supporting structure symmetrically so that only one (16A) of the control shafts 16A and 16B can be driven by the external drive motor 30, the contact roll 12 is supported. The rotation resistance of the system can be eliminated. That is, the rotation resistance (A) around one control shaft 16A driven by an external driving force is canceled by the rotation resistance (B) around the other control shaft 16B that is not driven, and as a result, the contact roll 1
2 The rotation resistance of the support system can be eliminated. As a result, the contact roll 12 rotates without affecting the web 1 winding force around the winding shaft 11 and the web 1
Make the winding shape good.

In the present embodiment, the contact roll 12 is made of carbon fiber reinforced plastic (CFRP), has a small inertia and reduces disturbance vibrations, thereby improving the appearance of web winding. ..

[0030]

As described above, according to the present invention, it is possible to obtain a contact roll device which makes it possible to wind the web around the winding shaft in a good condition.

[Brief description of drawings]

FIG. 1 is a front view showing a contact roll device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a schematic view showing a contact roll device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 web 10 contact roll device 11 winding shaft 12 contact roll 13 frame 14A, 14B movable frame 15A, 15B pressurizing cylinder device 16A, 16B control shaft 17A, 17B bending force applying cylinder device 21A, 21B guide rod 22A, 22B fulcrum bearing 23A, 23B Spindle part 30 External drive motor

Claims (3)

[Claims] 1. In a contact roll device for pressing a contact roll, which is arranged parallel to a winding shaft and rotates, to a web wound on the winding shaft, the contact roll is guided by respective left and right guides provided on a frame. Each of the left and right movable frames that can be moved in and out of contact with the take-up shaft, the pressure device that allows the left and right movable frames to move as described above, and the fulcrum bearings provided on each of the left and right movable frames. Left and right control shafts that are rotatably supported by each of them and that extend from the corresponding movable frame are used as support shafts, and that the support shafts rotatably support both left and right side parts of the cylindrical contact roll. And the left and right bending force applying devices that are supported by the left and right movable frames and apply the bending force around the fulcrum bearing to the left and right control shafts, and the left and right controlling devices are controlled by the left and right bending force applying devices. Bending the shaft, A contact roll device for imparting a desired bending curve to a contact roll supported by each control shaft. 2. The contact roll device according to claim 1, wherein the left and right bending force applying devices can independently set the bending forces applied to the left and right control shafts. 3. The contact roll device according to claim 1, wherein the rotation support structure of each of the left and right control devices is symmetrical, and only one of the control shafts can be driven by an external drive source.