JPH0474272B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for automatically winding up pressure-sensitive, thermopressure copying paper, etc. without pressing or rubbing.

(Prior Art) In an automatic sheet winding device, a sheet winding device winds a sheet around a winding tube that is placed on the upper surface of a pair of winding rolls and is rotationally driven by the winding rolls. A cutter is placed on the conveying direction side of the take-up roll and cuts the sheet fed onto the top surface of the take-up roll. A tube feeder that supplies the winding tube, and a sheet that is arranged vertically movable below the winding roll on the conveying direction side of the winding roll and is cut by the cutter from the winding tube to the cut point of the cutter. A winding tool that wraps the end around the winding tube, and a pair of winding tools that are arranged on the front and back surfaces of the sheet on the opposite side to the conveying direction of the winding roll and that sandwich the sheet after the winding tool is activated. a pinch roll; and a sheet end that is disposed between the pinch roll and the take-up roll and is wound around the take-up tube by pulling the sheet in a direction substantially perpendicular to the conveyance direction of the sheet after the pinch roll is operated. A known structure includes a pull-back roll that shortens the length of the sheet end, and a pusher that is drivably disposed above the take-up roll and winds the pulled-back sheet end around the take-up tube. This device wraps the end of the sheet cut with a cutter around a take-up tube using a winding device.
By operating the pullback roll and pulling the sheet with one end of the sheet held between the pinch rolls, the length of the sheet end wound around the winding tube can be shortened, and then the length of the shortened sheet end can be shortened. By pushing the sheet into the take-up tube 2 with a pusher and winding it up with the take-up tube so that the sheet ends do not have creases, the ends of the sheet do not become double, so even if the sheet is thick, the sheet can be straightened. It can be rolled up into a circular shape and can be used as a product up to the edge of the sheet.

(Problems to be Solved by the Invention) However, this device presses the cut end of the sheet against the winding tube with the curved part of the winding tool.
At this time, a pressing force is applied to the sheet, and the excess portion of the sheet is pulled back between the stationary take-up tool and the take-up roll by a pinch roll and a pull-back roll. The end of the sheet, which has been rubbed by the rolls and has become shorter, is pressed against the take-up tube by the pushing part of the curved surface of the pushing tool. There is a problem in that it cannot be used for winding color-producing pressure-sensitive or thermopress copying paper.

The present invention was made in order to solve the above-mentioned conventional problems, and includes attaching the edge of the sheet to the winding core, pushing it between the winding core and the winding drum,
Pull back the excess and hold down the entire sheet,
By applying non-pressure rubbing that does not cause rubbing,
It is an object of the present invention to provide a sheet winding device that can wind up pressure-sensitive or thermostatic copying paper without producing defective products.

(Means for Solving the Problems) A non-pressing and rubbing type sheet winding device according to the present invention rotates a pair of winding drums on which a winding core is placed, and a sheet is fed from a supply means to the winding core. A sheet winding device for winding up a sheet includes a pneumatic attaching means for attaching an end of the sheet cut by a cutter to the core; A small-diameter pushing roll that is pushed between the winding core and the winding drum, and a drum that rotates the pair of winding drums in the opposite direction to the winding direction of the sheet to pull back the excess portion of the edge of the sheet without scraping it. The above-mentioned problem is solved by a configuration including a reversing means.

(Function) In the sheet winding device of the present invention configured as described above, a desired winding of the sheet 3 is formed on the winding drums 1 and 2, and this winding is performed as shown in FIG. When sent out from drums 1 and 2,
The sheet 3 is cut by the cutter 16, the core 8 is fed onto the winding drums 1 and 2, and the end of the cut sheet 3 is attached to the core by the pneumatic attaching means 18 as shown in FIG. 8, a small diameter pushing roll 19 is attached to the operating means 20, 21 as shown in FIG.
When the push roll 19 is moved from the standby position to the push-in position with
and the winding drum 1. Accordingly, the winding drums 1 and 2 are temporarily rotated in the opposite direction to the winding direction of the sheet 3 by the reversing means 7 and 7 as shown in FIG. Rotate. Then sheet 3
The ends of the drums 1 and 2 move to follow the drums 1 and 2.
In addition, since it rolls into contact with the push roll 19, the excess is pulled back without being rubbed by it, so that the edge of the core 8 meets the push roll 19 as shown in an enlarged view in FIG. When approaching the contact point, the reverse rotation of the winding drums 1 and 2 by the reversing means 7 and 7 is stopped, and when the winding drums 1 and 2 are rotated forward, the sheet 3 is transferred to the winding core 8 as shown in FIG. As winding begins, press roll 1
9 is returned to the standby position as shown in FIG. 13, and the holding roll 9 is lowered onto the winding core 8 as shown in FIG. The so-called no-tuck winding is smoothly performed by winding the core 8 around the winding core 8 without any problems.

When the drums 1 and 2 are rotated in the opposite direction to pull back the end of the sheet 3, the cylinder 31 moves the adjustment roll 30 in the direction in which the slack in the sheet 3 is removed, thereby preventing the sheet 3 from becoming slack. When the winding drums 1 and 2 return to normal rotation, the adjustment roll 3
0 to the original position to prevent the tension of the seat 3 from fluctuating.

(Example) Hereinafter, an example of the non-rubbing type sheet winding device of the present invention will be described based on the drawings.

FIG. 1 is a side view of the device. FIG. 2 is a front view showing the relationship between the winding drum and the small-diameter sheet pushing roll. Figures 3 to 6 are enlarged side views showing the structure and function of the sheet push roll and its operating means; Figure 3 shows the push roll in the standby position; Figure 6 shows the state in which the sheet is pushed in for each of the large, medium, and small cores. 7 to 14 are schematic side views for explaining the operation of the device. FIG. 15 is an enlarged view of a portion of FIG. 12.

In Fig. 1, 1 and 2 are a pair of winding drums for winding the sheet 3, and as shown in Fig. 2, the respective shafts 4 and 5 (shaft 5 overlaps shaft 4 and cannot be seen, so Clutch 6 transmits forward rotation for winding up the sheet, and clutch 7 transmits reverse rotation for pulling back the excess portion of the cut sheet 3 to one side of the clutch (respective symbols are shown in parentheses). The drums 1 and 2 are equipped to rotate forward or backward in the same direction at a constant speed.

Note that the pullback dimension of the surplus sheet 3 due to the reversal of the winding drums 1 and 2 differs depending on the diameter of the winding core 8, so in order to obtain a pullback dimension that matches the diameter of the winding core 8, for example, proximity switch _s1,s2,
The range of rotation is regulated by _s3 , etc., so that a pullback dimension suitable for each core 8 can be reliably obtained.

Reference numeral 9 denotes a holding roll for winding the sheet 3, which is lowered onto the sheet 3 wound around the winding core 8 by a cylinder 10 operated by air pressure, rotates in contact with the sheet 3, and rolls the sheet 3 by the winding drums 1 and 2. 3. Winding is always performed smoothly and reliably.

Reference numerals 11 and 12 denote rolls serving as means for supplying the sheet 3. The rolls 11 are driven by pressing the sheet 3 between them, and the sheet 3 cut vertically by the slitter rolls 13 and 14 is rolled. It is supplied to the take-up drums 1 and 2 via a nip roll.

Reference numeral 16 denotes a cutter provided at the rear and upper part of the drum 2 (with respect to the traveling direction of the sheet 3), and when the winding of the sheet 3 is sent out from the winding drums 1 and 2, it is lowered onto the receiver 17. Cut the sheet 3 and return upward.

Reference numeral 18 denotes an air nozzle for attaching the end of the sheet 3 to the core 8. It is provided on the side from which the sheet 3 is taken out from the winding drum 2, and its air nozzle is directed toward the core 8 so that it is always in use. is positioned below the advancing surface of the sheet 3, and when the sheet 3 is cut, it rises and blows air toward the cut sheet 3, causing the end of the sheet 3 to attach to the core 8. .

19, 19 is the sheet 3 attached to the core 8
A pair of small-diameter pushing rolls that push the end of the winding drum between the winding core 8 and the winding drum 1,
As shown in FIG. 6, they are pivoted to the lower part of the holder 20 at predetermined intervals and brought into rolling contact with the sheet 3, so that the sheet 3 can be pushed in and pulled back without rubbing.

Incidentally, it is not necessary to use a pair of the above-mentioned pushing rolls 19;
Only one piece on the side can perform the same function.

Reference numerals 21 and 22 are long and short links for operating the holder 20 described above, and as shown in FIGS. The base of the short link 22 is pivotally attached to the provided protrusion 24, the base of the short link 22 is pivoted to the left side of the elevating plate 23, and the tip is fitted into the rotating piece 26 of the bracket 25 provided on the upper left side of the holder 20 and fixed with a nut 27. By pivoting the compression spring 28 to the head of the external connecting shaft 29, the holder 2
0 is held horizontally in the standby position as shown in FIG. The holder 20 descends with a large inclination to the left as shown in Fig. 4. If the diameter of the winding core 8 is medium, the holder 20 descends with a smaller inclination than before as shown in Fig. 5, and the winding center 8 is small in diameter, the holder 20 is lowered horizontally as shown in FIG. The roll 19 acts to squeeze the sheet 3 so as to push it in as deeply as possible.

Reference numeral 30 denotes an adjustment roll that prevents the sheet 3 from loosening when the winding drums 1 and 2 rotate in reverse to pull back the surplus portion of the sheet end.
As shown in the figure, when the sheet 3 is loosened by a cylinder 31 which is in contact with the sheet 3 between the feed roll 11 and the winding drum 1 and is operated by a differential pressure circuit, the sheet 3 is moved in the direction of tensioning the sheet 3 to eliminate the slack. It returns to its original position and maintains the tension of the seat 3 at a constant level at all times.

(Effects of the Invention) The non-pressure-rubbing sheet winding device according to the present invention allows the attached sheet end to be placed between the winding core and the winding drum even when the cut sheet end is attached onto the winding core. The sheet is not pressed or rubbed when pushing it in or pulling back the excess at the edge of the sheet, so it is possible to avoid pressure-sensitive and thermal copying paper, etc., which will color and become defective if pressed or rubbed. It is possible to reliably wind the product without producing non-defective products.

Since the sheet is wound without tack and no tack crease occurs at the beginning of winding, frequent breakdowns and irregularities in office machines, etc. are completely prevented, and the sheet can be used until the end without wasting it. .

It has the following unique effects.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a non-rubbing type sheet winding device of the present invention. FIG. 2 is a front view showing the relationship between the winding drum and the small-diameter sheet pushing roll. 3 to 6 are enlarged side views showing the structure and operation of a small-diameter sheet pushing roll and its operating means. FIG. 3 shows the roll in a standby position, and FIGS. 4, 5, FIG. 6 shows each of the large, medium, and small cores in the sheet pushing position. 7 to 14 are schematic side views for explaining the operation of the device. FIG. 15 is an enlarged view of a portion of FIG. 12. 1, 2... Sheet winding drum, 3... Sheet, 7, 7... Winding drum reversing means, 8...
Winding core, 11, 12...Sheet supply means, 18...
...Sheet attaching means to the core, 19...Small diameter sheet pushing roll.

Claims (1)

[Claims] 1. In a sheet winding device in which a pair of winding drums are placed on a core and rotated to wind up a sheet sent from a supply means onto the core, the end of the sheet cut by a cutter is attached to the core. a pneumatic attachment means for attaching the attached sheet to the sheet; a small-diameter pushing roll for rolling the edge of the attached sheet into rolling contact with the sheet and pushing it between the winding core and the winding drum; and the above-mentioned pair of winding rollers. A non-rubbing type sheet winding device characterized by being equipped with a drum reversing means that rotates the drum in the opposite direction to the sheet winding direction and pulls back the excess portion at the edge of the sheet without rubbing it. Device.