JPH0211398Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotary turret type unwinding machine that can continuously connect sheets regardless of the position at which the sheets are pulled out from the winding.

(Prior art) In paper factories, plastic factories, textile factories, etc., sheets are wound to a desired width and outer diameter using a coating device for applying a coating material to a sheet, or a winder device for obtaining a small winding. Various types of rotating turret type unwinders (hereinafter simply referred to as "unwinders") are used to continuously unwind the taken-up material. To connect the old and new windings in such an unwinding machine, the new winding is usually set in the unwinding machine and prepared for connection, and when the old winding has been rewound to a predetermined diameter, the turret starts rotating and the new winding is connected. Rotate the take-up to the connection position. Subsequently, an accelerator belt is activated to accelerate the new reel to machine speed, then a press roll presses the old sheet onto the new reel to make the connection, and at the same time a cutting knife is activated to cut the old sheet, Sheet rewinding from the new winding is performed.

However, the turret and each winding main shaft of such a rewinding machine are generally structured so that they can only rotate in the same direction, so in order to change the front and back sides of the sheet to be rewound, the change must be made at the stage of the winding sheet. It is necessary to do so.

However, for example, the roll obtained from a paper machine is usually wound so that the back side of the sheet is on the outside, so if you take the trouble to rewind it with a winder device so that the front side is on the outside and then put it on the unwinding machine, Additional processing is required. Therefore, so that the new winding and the old winding can be rotated forward and backward, the acceleration belts of both windings are made capable of forward and reverse rotation, and the motors that drive the main shafts of both windings are made capable of forward and reverse rotation, and the turret is A rewinding machine (hereinafter referred to as a "top and bottom pull type rewinding machine") configured to be able to rotate forward and reverse has also been proposed.

If such a double-pull type unwinding machine is adopted, there is no need to rewind the winding in advance using a winder device, but if, for example, the unwinding direction of the new winding changes from the unwinding direction of the old winding, In order for the sheet to pass between the new take-up and the nip roll, it is necessary to temporarily stop the operation of the coating device, winder device, etc., and rethread the sheet before changing the connections. Therefore,
There are still accompanying defects, such as a decrease in operational efficiency due to the stoppage of equipment operation, sheet loss in the stopped part, and increased burden on workers. Coupled with the recent trend toward high-mix, small-lot production, these defects have become impossible to ignore.

(Objective) The present invention provides a double-pull type rewinding machine that does not require stopping the operation of the coating device, winder device, etc. even when the sheet withdrawal position from the winding changes.

(Structure) When connecting the old and new take-up on a rotary turret type unwinding machine, the sheet can be pulled out from either the top or bottom of the new take-up, even if the sheet from the old take-up is pulled out from either the top or bottom of the take-up. In order to automatically connect the pulled sheet, a rotary press roll is installed near the unwinding machine, which has the function of pressing the old rolled sheet against the new rolled sheet when connecting the sheets, and the function of switching the sheet path. This is a rotating turret type rewinding machine that is characterized by being installed as a rotary turret.

(Example) The present invention will be explained in more detail based on the drawings. FIG. 1 shows an embodiment in which rotary press rolls 1 and 2 according to the present invention are applied to an upper and lower pull type unwinding machine. The upper and lower pull type unwinding machine used in this embodiment has rotating main shafts 5 and 6 facing each other for holding the windings 3 and 4, and these main shafts are rotated at a predetermined position by a brake mechanism (not shown). It allows forward and reverse rotation while maintaining the seat tension. Further, the turret rotation main shaft 7 for rotating the turret can also be rotated in forward and reverse directions by a drive mechanism. Therefore, both main shafts 5 and 6 for winding rotation can be rotated in forward and reverse directions on the rotation circumference 8. The rotary press rolls 1 and 2, which form the main part of the present invention, are a set of two press rolls installed horizontally and in parallel, and are configured so that they can rotate clockwise or counterclockwise by half a rotation. . Further, it is moved to the standby position by a moving mechanism (not shown) except when the seat is connected.

The usage of the rotary press roll of the present invention will be explained in more detail in connection with the above embodiments. When connecting the top take-up to the top take-up and then to the bottom take-up, the sheet 9 taken out from the old take-up 4 to the top take-up is Press roll B2 has moved to the rightmost connection position to perform connection after passing through the auxiliary roll 10
After contacting the lower surface of press roll A1 and then the upper surface of press roll A1, it moves to the next application part. On the other hand, the new take-up 3 for upper pulling moves clockwise on the rotational circumference 8 in order to perform the connection in the same manner, and stops near the press roll B2. To connect the sheets, first rotate the winding rotation main shaft 5 of the new winder counterclockwise to accelerate the new winder 3 to the speed of the sheet 9. Once the speeds are synchronized, press roll B2 is connected to the new winder 3. The process is completed by pressing and connecting to the new sheet, and at the same time cutting the old sheet 9 with a cutting knife (not shown) between the old winding 4 and the press roll B2. Next, the core of the old winding 4 is lowered and the lower winding is placed on it, but the direction of the rotation circumference 8 is counterclockwise, which is opposite to the previous one. The next sheet connection will be in the state shown in FIG. 2, but in this state the sheet 9 cannot be nipped onto the new take-up 3 by the press roll B2. Therefore, by the sheet path switching function of the rotary press roll, which is the main part of the present invention, both press rolls 1 and 2 are rotated half a rotation counterclockwise in the figure. Then, the sheet path is changed to the state shown in Fig. 3, and the press roll A
1, the sheet 9 can be nipped onto the new take-up 3. Press roll A1 for sheet 9
When you are ready to nip between the
In order to connect the sheets, the new take-up 3 is accelerated clockwise, and the sheets are connected in the following steps as described above.

In this way, the sheet connection from the top winding to the bottom winding, or from the bottom winding to the top winding, can be performed in advance by the sheet path switching function of the rotary press roll of the present invention. Therefore, it is obtained by rotating the press roll clockwise or counterclockwise.

Note that the rotary press roll is not limited to only two rolls, but a fourth roll.
A three-roll configuration or a four-roll configuration as shown in the figure is also possible, and the object of the present invention can be achieved as long as there is a combination of at least two rolls.

(Effects) If the double-pull type unwinding machine equipped with the rotary press roll according to the present invention is used, sheets can be connected continuously regardless of the winding direction.
The operational efficiency and sheet yield of coating equipment, winder equipment, etc. are greatly improved, and the burden on workers is also greatly reduced.

[Brief explanation of the drawing]

FIGS. 1 to 3 show an embodiment in which the two-roll rotary press roll of the present invention is applied to an upper and lower pull type unwinding machine. FIG. 4 shows an example of a three-roll configuration and a four-roll configuration of the rotary press roll, which is the main part of the present invention. 1...Press roll A, 2...Press roll B, 3...New take-up, 4...Old take-up, 5...(New take-up) main shaft for rotation, 6...(Old take-up) for rotation main shaft,
7...Main shaft for turret rotation, 8...Rotation circumference,
9...Sheet, 10...Auxiliary roll.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) When connecting the old and new winding on a rotating turret type unwinding machine, even if the sheet is pulled out from the old winding from either above or below the winding, the new winding In order to automatically connect sheets pulled out from either the top or bottom of the roll, a rotary press roll is installed in the roll, which has the function of pressing the old roll sheet against the new roll when connecting the sheets, and the function of switching the sheet path. A rotating turret type unwinding machine characterized by being installed close to the unwinding machine. (2) The unwinding machine according to claim 1, wherein the rotary press roll is composed of a set of at least two rolls whose main axes are parallel to each other. (3) When connecting the sheet from the old upper winding to the new lower winding, the rotary press roll is turned half a turn counterclockwise by the sheet path switching device in advance. A rewinding machine according to claim 1 of the utility model registration claim. (4) When connecting the sheet from the old lower winding to the new upper winding, the rotary press roll is turned half a turn clockwise by the sheet path switching device in advance. A rewinding machine according to claim 1 of the utility model registration claim.