JPH0352770Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to an unwinding device that is applied to unwinding a raw fabric wound into a roll.

<Conventional technology> Conventionally, in clothing sewing factories, there is a
Equipment is used to unwind and cut raw fabric to length. This unwinding machine is equipped with a movable table that reciprocates on a workbench, a web support section, a feeding roller, and a cutting cutter that reciprocates in the direction of the roller axis of the feeding roller. The end of the original fabric is fixed on a workbench, and the movable table is moved backward while the fabric is rewound and cut to a certain size.

<Problem that the invention aims to solve> However, the conventional fabric support unit has columns installed vertically on both sides of a movable table, and the central axis of the rolled fabric is supported between the two columns and rotated. Therefore, it takes a lot of effort to hook and remove it. Moreover, in such a drive system, when the unwinding speed is increased, a special control mechanism is required to prevent inertia rotation, and in particular, as the roll diameter of the original fabric decreases, the unwinding speed decreases. arise.

The applicant had previously proposed an unwinding machine in which a plurality of rollers rotatably support the web, and a feed roller pulls and rewinds the web (Utility Model No. 56).
−154949).

According to this device, the work of hanging the original fabric was simplified and the problem of inertial rotation was solved, but it was found that there was a risk that the fabric would stretch, especially at the beginning of unwinding when the weight of the original fabric was large.

This invention solves the above problems all at once by driving both rollers to rotate at the same circumferential speed, with the lowest roller serving as the material driving roller and the highest roller serving as the feeding roller. An object of the present invention is to provide a device for unwinding a rolled original fabric.

<Means for solving the problem> The original fabric rewinding device of this invention has a plurality of rollers arranged in parallel and in an arc shape to freely rotatably support the rolled fabric. The lower original fabric drive roller and the uppermost delivery roller are linked by an interlocking means and connected to a drive motor to rotate at a constant circumferential speed.

<Operation> The rolled material is supported by a plurality of rollers, and the fabric goes around the delivery roller and is drawn out to the delivery side.

When operating the drive motor in this state,
Since the drive roller is in contact with the original fabric, it rotates the original fabric in one direction and rewinds it by the rotational circumferential length. On the other hand, since the feed roller rotates at the same circumferential speed as the drive roller via an interlocking means, the fabric unwound from the original fabric is conveyed by the unwinding length, which causes unreasonable tensile force to be applied to the fabric. There is no risk of the fabric stretching or sagging. As a result, the fabric can be smoothly fed out, making it possible to always cut the fabric to the appropriate length. Moreover, since the web roll rotates while contacting the circumferential surface of the drive roller, the unwinding speed does not change at all even if the winding diameter of the web roll becomes smaller, and stable unwinding of the web is always performed.

<Embodiment> The drawing shows an example in which a reciprocating movable platform 2 is provided on a workbench 1 of an unwinding machine, and a material rewinding device 3 according to an embodiment of the present invention is provided on this movable platform 2. It shows.

In this fabric rewinding device 3, a plurality of rollers 4 are arranged in parallel and in an arc shape to rotatably support a roll-shaped fabric 8. The feed roller 42 is connected to the drive motor 4 by an interlocking means 43 such as a chain.
4 to rotate at a constant circumferential speed.

The above-mentioned original fabric drive roller 41 and feeding roller 4
2 are rollers of the same thickness, and their peripheral surfaces are surface-treated with rubber having a high friction coefficient, so that the amount of unwinding of the original fabric and the amount of feeding are made equal to each other.

Reference numeral 5 in the drawing denotes a cutter device disposed at the front of the movable platform 2, which reciprocates in the width direction of the fabric 81 every time a certain length of fabric 81 is rewound onto the workbench 1. cut.

6 is a photoelectric fabric detector disposed on the downstream side of the feeding roller 42, which detects the fabric 81 hanging between the feeding roller 42 and the driven roller 7;
The drive motor 44 is controlled to turn on and off.

Thus, the rolled raw fabric 8 is supported by the plurality of rollers 4, and the fabric 81 from the raw fabric 8 is fed out from the rollers 4.
2 and passes through multiple driven rollers 7 to the workbench 1.
Pull it upward and fix the edge of the fabric to the edge of the workbench 1. In this state, when the drive motor 44 is operated, the drive roller 41 is in contact with the original fabric 8, so the original fabric 8 is rotationally driven in one direction, and the fabric 81 is rewound by the rotational circumferential length. On the other hand, since the feeding roller 42 rotates at the same speed as the drive roller 41 via the interlocking means 43, the fabric 81 rewound from the original fabric 8 is fed and conveyed by the rewound length. Therefore, no unreasonable tensile force is applied to the fabric 81, and the fabric 81
There is no risk that 1 will stretch, and no slack will occur. By retracting the movable table 2 in accordance with this feeding operation, the fabric 81 is rewound and stretched onto the workbench 1, the movable table 2 is stopped, the cloth is cut by the cutter device 5, and the same operation is repeated. It is. In this case, since there is no elongation in the fabric 81, the fabric will always be cut to an appropriate length.

<Effects of the invention> As described above, this invention has a plurality of rollers that rotatably support the roll-shaped fabric arranged in parallel and in an arc shape, and the lowest fabric driving roller and the highest feeding roller. Since these are connected by an interlocking means and rotated by a drive motor at a constant circumferential speed, the supported roll material rotates by contact with the drive roller, unwinding the fabric, and unwinding the fabric. The returned fabric is fed out by the unwinding length by a feeding roller that rotates at the same circumferential speed as the drive roller. Therefore, compared to the conventional structure in which the central shaft of the original fabric is rotationally driven, the effect of rotational inertia generated on the original fabric is reduced. Further, since no excessive tensile force is applied to the fabric, there is no risk of stretching the fabric, and no sagging occurs, so smooth feeding and cutting to appropriate dimensions can be achieved. Moreover, since the drive roller contacts the circumferential surface of the web and unwinds it, even if the winding diameter of the web becomes smaller, the unwinding speed remains the same and the amount of unwinding remains constant.
It produces the effect of achieving the intended purpose.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a part of a unwinding machine in which a rewinding device for original fabric according to an embodiment of the invention is used, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 4 is an enlarged sectional view taken along the line -- in FIG. 3. 3... Fabric rewinding device, 4... Roller, 41...
... Drive roller, 42 ... Feeding roller, 43 ...
Interlocking means, 44... motor, 8... original fabric.

Claims (1)

[Claim for Utility Model Registration] A plurality of rollers that rotatably support a roll of raw fabric are arranged in parallel and in an arc shape, and the lowest fabric driving roller and the highest feeding roller are interlocked. A rewinding device for a roll-shaped original fabric, which is connected to a drive motor and driven to rotate at a constant circumferential speed. The roll-shaped roll according to claim 1, wherein the original fabric drive roller and the feeding roller are rollers of the same thickness, and the peripheral surface of each roller is surface-treated with rubber having a high friction coefficient. Original fabric rewinding device.