JPH0520338B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a cutting device for cutting an original fabric sheet into several narrow sheets, and a device for pressing the winding start portion of the sheet with a predetermined pressure. This invention relates to a center-driven take-up type slitter that maintains the flow of the sheet between the slitter and the touch roller and keeps the winding state of the sheet constant from beginning to end, regardless of the sheet winding diameter.

[Conventional technology]

This type of center-driven sheet winding device is described in Japanese Patent Application Laid-Open No. 106946/1983. In this sheet winding device, all rollers such as a touch roller and a cutting roller are mounted on a moving frame, and the means for applying forward force to this moving frame and generating touch pressure is a cylinder device operated by pneumatic or hydraulic pressure. By increasing the winding diameter of the sheet, the rod of the cylinder device is retracted against the protruding force of the rod, thereby retracting the movable frame.

Generally, when winding up a sheet by pressing a touch roller against the winding part of the sheet, it is said that the winding appearance will be better if the touch pressure is gradually reduced as the winding diameter of the sheet increases. . In this way, the touch pressure needs to be controlled in order to gradually decrease the touch pressure as the winding diameter of the sheet increases. However, since the touch pressure generating means in the sheet winding device described above is a pneumatic or hydraulic cylinder device, a predetermined touch pressure is applied to the sheet while retracting the rod against the protruding force. It is very difficult to keep adding. In other words, in the case of pneumatic pressure, it is necessary to lower the air pressure inside the cylinder body as the rod of the cylinder device retreats, and in the case of hydraulic pressure, it is necessary to discharge the pressure oil in the cylinder body. becomes. While performing such control,
Controlling the touch pressure, which is the pressure force of the touch roller against the sheet being wound up, as described above,
It is extremely difficult.

Further, Japanese Patent Application Laid-Open No. 61-295971 also describes a center drive type sheet winding device of the above type. This sheet winding device has a configuration in which all rollers such as touch rollers and cutting rollers are mounted on a moving frame, and this moving frame is moved back stepwise or continuously by a piston cylinder depending on the thickness of the sheet. It is. In such a sheet winding device, all or most of the rollers, including the touch roller and cutting roller, are mounted on a moving frame, and the moving frame is moved back according to the thickness of the sheet. If the retraction speed of the frame is not the same as the winding speed of the sheet, the position of the Tatsuchi roller relative to the wound sheet will change, changing the winding state of the sheet, which will have a negative impact on the winding appearance of the rolled product. affect In the sheet winding device described in JP-A No. 61-295971, the moving frame is moved backward by a piston cylinder, and the moving frame is moved backward as described above by controlling the piston cylinder. is extremely difficult.

In view of the problems of the conventional center-driven slitter as described above, the present invention makes it possible to improve the layout of the sheet by keeping the position of the winding start portion of the sheet unchanged, and by keeping the distance between the cutting device and the touch roller unchanged. This was done to improve the appearance of the rolled product by keeping the condition constant from beginning to end, regardless of the sheet winding diameter.

[Means for solving problems]

The present invention includes a roller that constitutes a cutting device for cutting a raw sheet into several narrow sheets, and a touch roller that presses the winding start portion of the sheet to be wound around a winding shaft with a predetermined pressure. Several rollers, including the roller between the two, are supported horizontally on a moving frame, and this moving frame is mounted on the machine base so as to be movable linearly in the direction perpendicular to the axis of the winding shaft. In the center drive take-up type slitter, the movable frame is moved backward according to the thickness of the sheet by a frame drive means while pressing the touch roller against the winding start portion of the sheet. By controlling the retraction speed of the moving frame with respect to the winding shaft to be inversely proportional to the sheet winding diameter,
This center-driven take-up type slitter is characterized in that the movable frame is retracted so that the retracting speed of the movable frame is the same as the winding and thickening speed of the sheet.

〔Example〕

Embodiments of the invention are shown in FIGS. 1-4.

There is a space 4 in the center of the machine base 2 for carrying out the rolled product.
An unwinding shaft 6 for unwinding the original fabric sheet S is provided on one side of this space 4, and two winding shafts 8 are provided on the other side of the space 4, vertically They are provided at predetermined intervals in the direction.
This winding shaft 8 is supported by both side walls 10 of the machine base 2.

As shown in FIGS. 1 and 2, four sliding rails 12 are installed on the machine base 2 in a direction perpendicular to the axis of the winding shaft 8 and in a horizontal direction at predetermined intervals vertically and horizontally, respectively. It is set aside. A moving frame 14 is mounted on this sliding rail 12 and linearly moves in the horizontal direction. The movable frame 14 has openings on its front and rear surfaces, and several rollers, which will be described later, are supported on both side plates 16 of the movable frame 14.

The raw sheet S wound around the winding shaft 6 is
Each guide roller 2 is unwound by a pair of nip rollers 18, 20, one of which is a driving roller.
2, 24, 26, 28, 30 and the dancer roller 32, the original sheet S travels above the space 4, passes through the guide rollers 34, 36, 38, and passes through the cutting device A. It is cut into several thin sheets S′. The cutting device A of this embodiment is
Although it consists of a razor 40 and a lower blade roll 42, it is also possible to install a cutting device consisting of a shear cutter.

The pair of nip rollers 18, 20 and the guide roller 34 are supported on the side wall 10 of the machine base 2, but each roller between the guide roller 36 and the touch roller 44 pressing the beginning of the cut sheet S' is Both side plates 16 of all moving frames 14
The moving frame 14 is supported by the moving frame 14, and is configured to move together with the moving frame 14. Several strips (four strips in the embodiment) of sheets S' cut into thin strips by the cutting device A are alternately divided vertically and passed through guide rollers 46, 48 and touch rollers 44, respectively. is wound up on the winding shaft 8.

As shown in FIGS. 1 and 4, a touch roller support shaft 50 is mounted on both side plates 16 of the moving frame 14.
is supported, and a tatsura roller 44 is rotatably supported at the lower end of each arm 52 attached to both ends of the tatsura roller support shaft 50. This touch roller 44 is a free roller.

As shown in detail in FIG. 3, at the lower end of each arm 52 attached to both ends of the touch roller support shaft 50, there is a touch pressure adjusting air cylinder 54 whose base end is rotatably pivoted. A rod 56 is connected, and the touch pressure of the touch roller 44 is adjusted by adjusting the air pressure of the air cylinder 54.

When winding up the cut sheet S', the movable frame 14 is driven by a servo motor M to gradually retreat with respect to the winding shaft 8, and the servo motor M controls the retreating speed. be exposed. As shown in FIG.
Servo motors M are attached to the upper and lower machine bases 2 of 4, respectively, and the servo motors M rotate the ball screw 58 and rotate the bottom plate 60 of the moving frame 14.
Attach the ball nut 64 to the bracket 62 attached to the
is attached, and the moving frame 14
A ball nut 64 is attached to a horizontal member 69 stretched between brackets 68 at both ends of the top plate 66, and the ball nut 64 and the ball screw 58 are screwed together. The upper servo motor M is the machine base 2.
It is attached to the upper beam part 70 of the.

The rotational speed of this servo motor M is controlled to be inversely proportional to the sheet winding diameter D of the winding shaft 8.
As a result, as shown in FIG. 5, the retraction speed V of the moving frame 14 is inversely proportional to the sheet winding diameter D and becomes equal to the winding speed of the sheet S'. Therefore, the position of the touch roller 44 with respect to the sheet (rolled product) wound around the winding shaft 8 remains unchanged, and the sheet
The beginning of the winding of S' remains constant throughout. In this embodiment, the servo motor M serves as a drive device with a control mechanism that linearly moves the movable frame 14 by controlling the backward speed V of the movable frame 14 with respect to the winding shaft 8 to be inversely proportional to the sheet winding diameter D. There is.

If the retraction speed V of the movable frame 14 with respect to the winding shaft 8 is the same as the winding speed of the sheet from beginning to end, the position of the touch roller 44 will remain unchanged and there will be no problem. If a slight difference occurs between the backward speed V of the moving frame 14 and the thickening speed of the sheet S', the arm 52 supporting the touch roller 44 rotates in either direction. That is, when the backward speed V of the movable frame 14 is slightly larger than the roll thickening speed of the sheet S', the arm 52 rotates in the direction of arrow P (see FIG. 3), and in the opposite case, the arm 52 rotates. is an arrow
As it rotates in the direction P', the winding start portion of the cut sheet S' changes slightly, which adversely affects the winding appearance of the wound product.

In order to prevent such a situation, as shown in FIG. 3, proximity switches 72 and 74 are provided at both ends of the lower end of the arm 52.
When the servo motor M rotates by a certain angle or more, the proximity switches 72 and 74 operate to rotate the servo motor M.
The rotation speed is adjusted each time. By correcting the rotational speed of the servo motor M in accordance with the winding speed of the sheet S', the winding start portion of the sheet S' is kept constant throughout.

In this way, the movable frame 14 retreats with respect to the winding axis 8 according to the thickness of the sheet, so the distance from the cutting device A to the beginning of winding of the sheet S' remains constant from beginning to end, and the sheet winding diameter D and The traveling distance and traveling position of the cut sheet S' remain unchanged regardless of the distance, and moreover, the traveling distance of the sheet S' becomes shorter. For this reason, the winding condition of the sheet S' remains constant from beginning to end, and this provides a good winding appearance of the wound product.

In addition, when performing so-called close winding in which the touch roller 44 is not pressed against the wound product, the rod 56 of the touch pressure adjusting air cylinder 54 is retracted and the moving frame 14 is Photo sensor 76 attached to the tip
By detecting the distance between the moving frame 14 and the surface of the wound product, it is possible to perform close winding by keeping this distance constant throughout.

〔Effect of the invention〕

The present invention includes a roller that constitutes a cutting device for cutting a raw sheet into several narrow sheets, and a touch roller that presses the winding start portion of the sheet to be wound around a winding shaft with a predetermined pressure. Several rollers, including the roller between the two, are supported horizontally on a moving frame, and this moving frame is mounted on the machine base so as to be movable linearly in the direction perpendicular to the axis of the winding shaft. In the center drive take-up type slitter, the movable frame is moved backward according to the thickness of the sheet by a frame drive means while pressing the touch roller against the winding start portion of the sheet. By controlling the retraction speed of the moving frame with respect to the winding shaft to be inversely proportional to the sheet winding diameter,
Since the movable frame is configured to retreat so that the retreat speed of the movable frame is the same as the winding speed of the sheet, the touch roller retreats linearly and the position of the sheet winding start portion remains unchanged. , the traveling distance and traveling position of the cut sheet remain unchanged, and the traveling distance of the sheet is shortened.

For this reason, the winding state of the sheet remains constant from beginning to end regardless of the sheet winding diameter, which is different from the conventional center-driven winding type slitter in which the traveling distance and traveling position of the cut sheet change every moment according to the sheet winding diameter. In comparison, the rolled appearance of the rolled product is improved.

Further, it becomes possible to freely adjust the touch pressure of the touch roller by a simple means.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a center-driven take-up type slitter according to the present invention, and FIG.
FIG. 3 is an enlarged side view of the touch roller 44;
FIG. 4 is a front view showing the support structure of the touch roller 44, and FIG. 5 is a diagram showing the sheet winding diameter D and the moving frame 1.
FIG. 6 is a side view of the touch roller 44 when close winding is performed. The explanation of the symbols of the main parts is as follows. A: cutting device, M: servo motor (drive device with control mechanism), S: raw sheet, S': cut sheet, 2: machine base, 8: winding shaft, 10: side wall of machine base, 12 :Sliding rail, 14:Moving frame, 1
6: Side plate of moving frame, 40: Leather, 42:
Lower blade roll, 44: Tatsuchi roller.

Claims (1)

[Scope of Claims] 1. A roller constituting a cutting device for cutting a raw sheet into several narrow sheets, and a roller for pressing the winding start portion of the sheet to be wound around a winding shaft with a predetermined pressure. Several rollers, including the roller between the touch roller and the touch roller, are supported horizontally on a movable frame, and this movable frame is mounted on the machine base so as to be movable linearly in the direction perpendicular to the axis of the winding shaft. In a center drive take-up type slitter configured to move the movable frame backward according to the thickness of the sheet by a frame drive means while pressing the touch roller against the winding start portion of the sheet by means of a frame drive means, the drive mechanism includes a drive mechanism with a control mechanism. Therefore, by controlling the retracting speed of the movable frame with respect to the winding shaft to be inversely proportional to the sheet winding diameter, the retracting speed of the movable frame is made equal to the sheet winding speed, and the movable frame is A center-driven take-up type slitter that features a retracting mechanism.