JPS6353891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for removing a protruding portion of a protective sheet that is being wrapped around the outer periphery of a cylindrical object such as a thin plate coil from an end surface of the cylindrical object. On the end face of, as the cylindrical object rotates,
This invention relates to a sheet edge folding method for folding a sheet into a chrysanthemum shape.

Conventional equipment used for such edge-folding of sheets wraps the sheet around a cylindrical object and then folds the protruding portion of the sheet that protrudes cylindrically from the end surface of the cylindrical object. It was structured like this. Therefore, the cylindrical protruding portions of the sheet must be folded all at once, making it very difficult to fold neatly and requiring a complicated device. In addition, an edge folding device is provided separately from the sheet wrapping device, and it is necessary to transfer the cylindrical object with the sheet wrapped thereon from the sheet wrapping device to the edge folding device, which requires a large space occupied by the entire equipment. However, there is a possibility that the sheet loses its shape during transportation between the two devices, and a means for correcting this deformation is also required.

The present invention provides a method for folding a sheet wrapped around the outer circumference of a cylindrical object without the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the attached illustrative drawings.

In Figures 1 to 3, 1 is a cylindrical object;
2a and 2b are rollers that support the cylindrical object 1 in a sideways state and drive it to rotate; one roller 2a is interlocked and connected to a drive motor 3. 4 is a conveyor that supports and conveys the sheet 5 wrapped around the outer circumference, and 6 is a guide belt conveyor that aligns the sheet 5 with the outer peripheral surface of the cylindrical object 1, and is located at a position where it does not get in the way when the cylindrical object 1 is carried in and out. It can be moved to or opened.
7 is an edge folding device according to the present invention, in which a cylindrical object 1
Although the device is disposed outside both axial ends of the device, only one device is shown in the drawing.

The edge folding device 7 is supported by a guide rail 8 so as to be movable in the axial direction of the cylindrical object 1, and is moved by a cylinder unit 9 between a retracted position A shown by a phantom line and an operating position B shown by a solid line. The present invention is comprised of a moving carriage 10, a manipulator 11 disposed on the moving carriage 10, a pressing means 12, a creasing means 13, and a sheet extension guide 14.

The presser means 12 includes an arc-shaped presser body 15 concentrically facing the end surface of the cylindrical object 1, and this presser body 1.
5, and a support frame 17 that supports the presser body 15 so as to be movable in a direction away from the end surface of the cylindrical object 1 against the biasing force of a compression coil spring 16.
can be composed of a plate that slides well against the sheet 5, but as shown in FIG. Free roller 18 to substrate 19
It can also be constructed by being pivoted on.

The creasing means 13 includes a swinging arm 21 having a presser roller 20 pivotally supported at its tip, and a cylinder unit 22 that swings this arm 21. The swing arm 21 is configured to be able to move backward toward the rotation center shaft 24 side.

The manipulator 11 has the degree of freedom necessary to perform the sheet edge folding operation described later, and has a sheet clamp 25 at the tip of its arm that can be opened and closed and can clamp the side edge of the sheet 5. have

In addition, in FIG. 1, 26 indicates the rollers 2a, 2
The sheet guide roller is disposed between the sheet guide rollers b and is pressed against the cylindrical object 1 by a spring.

Next, a working method using the above device will be explained. As shown in the figure, the cylindrical object 1 is moved between the rollers 2a and 2.
b, and the motor 3 drives the roller 2a to move the cylindrical object 1 along the arrow 2 shown in FIG.
Rotate in 7 directions. On the other hand, the specified size is set to be wider than the width (axial length) of the cylindrical object 1 by an amount necessary for folding both ends, and slightly longer than the circumferential length of the cylindrical object 1. sheet 5,
It is conveyed to a position where its tip is drawn between the roller 2b and the cylindrical object 1. As a result, the sheet 5 is drawn in as the cylindrical object 1 rotates and is automatically wrapped around the outer peripheral surface of the cylindrical object 1, but the sheet 5 protrudes from the end surface of the cylindrical object 1. The portion 28 is gradually moved toward the end surface of the cylindrical object 1 by the guide 14.

As described above, due to the presence of the sheet protrusion guide 14, the side edge 29 of the sheet protrusion 28 is
Although it moves along a certain path while protruding from the guide 14, the tip 29a of the side edge 29
When reaches the clamp point a shown in Fig. 5,
The sheet clamp 25 of the manipulator 11 clamps the sheet protrusion side edge tip 29a,
Then, the manipulator 11 is operated to move the tip 29a to a fixed point b set close to the end surface of the cylindrical object 1 shown in FIG. 5 and near the center of the end surface. As a result, the front edge 28a of the sheet projecting portion 28 is bent so as to substantially follow the end surface of the cylindrical object 1.

Thereafter, due to the rotation of the cylindrical object 1, the tip 29a of the side edge 29 of the sheet protruding portion that is at the fixed point b is
As shown in FIG. 5, when the sheet reaches a position c which has progressed a certain distance in the rotational direction, the sheet clamp 25 of the manipulator 11 clamps a portion 29b located at the clamp point a of the side edge 29 of the sheet protruding portion. and move this clamping point 29b to the fixed point b. At this time, a point 28c connecting the bending point 29c of the side edge 29 of the sheet protruding portion located between the fixed points a and c and the portion 28b where the sheet 5 begins to touch the peripheral edge of the end surface of the cylindrical object 1 is bent into a corner shape. The movement path of the sheet clamp 25 in the manipulator 11 is set so that the portion 28d connecting the clamping portion 29b of the side edge 29 of the sheet protruding portion and the portion 28b is bent into a protruding corner shape. There is.

Due to the rotation of the cylindrical object 1, when the clamping point 29b of the side edge 29 of the sheet protruding portion, which was at the fixed point b, reaches the position c, which has advanced a certain distance in the direction of rotation, as shown in FIG. A portion 29b located at the clamp point a of the side edge 29 of the sheet protruding portion is clamped by the sheet clamp 25 of the manipulator 11, and this clamped portion 29b is moved to the fixed point b as described above.

Thereafter, the same edge folding action is repeated, but immediately after the sheet clamp 25 of the manipulator 11 moves the clamping point 29b of the side edge 29 of the sheet protruding portion to the fixed point b, the folding action is performed as shown in FIG. The swing arm 21 of the weighting means 13 is moved to the standby position C.
By making one reciprocating movement from
0 presses the bent portions 28c, 28d of the sheet projecting portion 28 against the end surface of the cylindrical object 1 while moving backward against the spring 23 between positions DE, Add a crease to 28d. In addition, in the configuration shown in FIG. 4, the presser roller 2
0 returns to the standby position C from position E via position D, but this return movement path may be configured to move away from the folded sheet protrusion 28 as indicated by a broken line 30. Moreover, the rolling direction of this presser roller 20 between positions DE and E is as follows:
As shown in FIG. 1, it is desirable that the rotation direction of the cylindrical object 1 be approximately parallel to the direction of rotation.

As the cylindrical object 1 rotates, the folded portion 31 (FIGS. 6 and 7) in which the folded portions 28c and 28d are creased by the creasing means 13 as described above, As is clear from the figure, presser means 1
It enters between the presser body 15 of No. 2 and the end surface of the cylindrical object 1, and is prevented from rising from the end surface of the cylindrical object 1 by the presser body 15.

The above-mentioned edge folding action by the manipulator 11 is performed by the manipulator 11 according to a motion program learned and memorized in advance according to the diameter and rotational speed of the cylindrical object 1, the amount of protrusion of the sheet protrusion 28, etc.
1 can be automatically operated.

A sheet 5 is wrapped around the entire circumference of the cylindrical object 1,
All of the sheet projecting portions 28 are folded into a chrysanthemum shape on the end surface of the cylindrical object 1, thereby completing the winding and edge folding of the sheet. On the inner surface of the terminal edge 5a of 5,
If the adhesive 32 is applied by an appropriate means,
The trailing edge 5a of the sheet can be overlapped with the leading edge of the sheet and bonded to each other.
Of course, by applying the adhesive 32 also to the terminal edge 28e of the sheet protrusion 28, it is effective to suppress the lifting of the folded sheet protrusion 28. Moreover, instead of applying adhesive, it is also possible to apply adhesive tape by any suitable means.

As a final treatment method for the sheet portion folded into the chrysanthemum shape on the end face of the cylindrical object, that is, the chrysanthemum-like folded sheet portion 33, as shown in FIG. The center of the chrysanthemum-shaped folded sheet portion 33 can be pasted on the chrysanthemum-shaped folded sheet portion 33, or by using a pushing jig 35 that fits into the central cavity 1a of the cylindrical object 1 as shown in FIG. A method is employed in which the cylindrical sheet portion 33a inside the central cavity 1a is affixed with an adhesive tape, if necessary. The processing of these chrysanthemum-shaped folded sheet portions 33 can also be carried out by separating the edge folding device 7 from the end surface of the cylindrical object 1 while the cylindrical object 1 is supported on the rollers 2a and 2b.

The present invention can be implemented as described above, and its feature is that a sheet that is being wound around the outer periphery of a cylindrical object that rotates in a fixed position protrudes from the end surface of the cylindrical object. The side edges of the part are held at appropriate intervals in the longitudinal direction by a manipulator (either a manipulator configured specifically for edge folding or a general-purpose manipulator may be used),
As the cylindrical object rotates, the protruding portion of the sheet is folded into a chrysanthemum shape by sequentially moving the sheet to a position near the center of the end surface of the cylindrical object, and this chrysanthemum-shaped folded portion is folded into the cylindrical object. The cylindrical object is held in a pressed state against the end surface by a pressing means disposed close to the end surface and along the circumferential direction of the end surface.

According to the method of the present invention, compared to the conventional method of wrapping a sheet around a cylindrical object and then simultaneously folding the protruding portion of the sheet that protrudes in a cylindrical shape from the end surface of the cylindrical object. Not only can it be carried out with a simple device, but it can also be folded neatly and neatly. Furthermore, since sheet wrapping and edge folding can be performed simultaneously in the same location, the installation space for the equipment can be greatly reduced compared to the case where dedicated equipment for each is installed separately. The time required for winding the sheet and folding the edge thereof is also shortened. Further, there is no drawback that the sheet loses its shape during conveyance between the two devices, and of course there is no need for means for correcting the sheet's deformation.

In addition, by changing the clamping distance between the manipulator and the side edge of the sheet protruding part and the moving destination position of the clamping part, the shape of the sheet folding part 31 can be changed arbitrarily, and the shape of the sheet folding part 31 can be changed according to the properties of the cylindrical object. It is possible to create the optimal edge fold according to your needs. Furthermore, if a manipulator with a wide operating range and a large degree of freedom is used, changes in the diameter of the cylindrical object and changes in the amount of protrusion of the sheet protrusion can be easily accommodated.

[Brief explanation of drawings]

Fig. 1 is a schematic side view, Fig. 2 is a plan view, Fig. 3 is a front view, Fig. 4 is an enlarged plan view of main parts, Figs. The figure is a perspective view showing a method of processing the chrysanthemum-shaped folded sheet portion, and FIG. 9 is a longitudinal sectional view showing another method of processing. 1... Cylindrical object, 2a, 2b... Roller,
4... Sheet conveyor, 5... Sheet, 7
. . . Edge folding device, 10 .
... Presser body, 20 ... Presser roller, 21 ... Swinging arm, 25 ... Sheet clamp, 28 ... Sheet protrusion, 28c, 28d ... Bending part,
29... Sheet projecting portion side edge, 29b... Clamping portion, 31... Folding portion, 33... Chrysanthemum-shaped folded sheet portion.

Claims (1)

[Claims] 1. Using a manipulator, the sheet is being wrapped around the outer periphery of a cylindrical object that rotates in a fixed position, and a manipulator is used to hold the side edges of the protruding parts that protrude from the end surface of the cylindrical object at appropriate intervals in the length direction. As the cylindrical object rotates, the cylindrical object is sequentially moved to a position near the center of the end face of the cylindrical object, thereby folding the protruding portion of the sheet into a chrysanthemum shape, and folding this chrysanthemum-like folded portion into the cylindrical shape. A sheet wrapped around the outer circumference of a cylindrical object, characterized in that the sheet is held pressed against the end surface of the cylindrical object by a pressing means disposed close to the end surface of the object and along the circumferential direction of the end surface. How to fold the ears.