JPS636401B2 - - Google Patents

Description

[Detailed description of the invention] (Field of application of the invention) The present invention relates to a method for packaging metal coil bores.

BACKGROUND OF THE INVENTION It is known that strip products rolled in hot or cold strip mills and wound in winders are packaged as coils. For example, Japanese Patent Application Laid-Open No. 57-68315 proposes a method of wrapping the coil by covering the inner periphery of the coil with wrapping paper, wrapping a wide wrapping paper around the outer periphery, and folding the left and right ears to cover the end face of the coil. There is.

Conventionally, wrapping the inner periphery of the coil has been done entirely by hand, and the wrapping work, which is carried out with half of the body extending into the inner hole of the coil, is very tiring and dangerous.

Japanese Patent Publication No. 55-20933 proposes a gripping device in which an inner tube is wound around a paper drum having a double structure of inner and outer drums, the inner tube is inserted into the inner hole of the coil, and the tip of the paper tube is grabbed from the other side. .

In addition, Japanese Patent Application Laid-Open No. 140690/1983 discloses that a sheet piece of a predetermined length is wrapped around a contractible cylinder that can be expanded and contracted in the radial direction.
It is proposed that after obtaining a cylindrical sheet, the shrinkable body is inserted into the inner hole of the coil to cover the inner hole of the coil with the cylindrical sheet.

Furthermore, Japanese Utility Model Application Publication No. 54-44273 discloses an insertion method in which the inner cylinder paper is wound around a forming drum having a suction hole for suctioning and fixing the tip of the inner cylinder paper to form an inner cylinder shape, and then the inner cylinder paper is inserted and fixed into the inner hole of the coil. An apparatus is disclosed.

In both of these, an inner tube is wound around a drum and formed into a cylindrical shape.

(Object of the Invention) The present invention solves these problems and proposes a method for automatically wrapping the inner periphery of a coil, thereby achieving automation and labor saving in the coil wrapping operation.

(Structure of the Invention) That is, in the present invention, wrapping paper cut in advance to a predetermined length is stored in a mandrel via pinch rolls, and the mandrel is moved while the tail end of the wrapping paper is held between the pinch rolls. Insert the coil into the inner hole, then press the pinch roll against the wall of the coil inner hole while holding the tail end of the wrapping paper, start rotating the mandrel, and while rotating the mandrel, press the pinch roll against the wall of the coil inner hole. It is characterized in that the wrapping paper is laid in the coil inner hole by contact with the coil inner hole wall and the pressing force of the swing roll.

(Example of the invention) The present invention will be explained below with reference to the drawings.

FIG. 1 is a schematic diagram showing the flow of packaging work according to the present invention. Wrapping paper 16 (hereinafter referred to as inner paper) unwound from roll paper 11 is held by feed roll 12, given a desired length l, and sheared by shear 1.
3, and is stored in a mandrel 17 via a feed conveyor 14 and a leveler roll 15.

The mandrel 17 containing the inner paper 16 is inserted into the inner hole 30 of the coil 10, and the inner paper 16 is laid on the inner wall of the inner hole 30. The coil width varies depending on the standard, but is 500 to 2180 mm, so the length of the mandrel 17 is determined to correspond to the coil width. Further, since the diameter of the coil inner hole is usually 20 inches to 28 inches, the inner circumferential paper 16 is cut into a predetermined size according to the coil inner hole size.

FIG. 2 is a schematic cross-sectional view of the mandrel 17. The mandrel case 23 has a cylindrical shape with a length that accommodates the inner circumferential paper 16, and an opening 24 for supplying and discharging the paper is provided in a part of the inner cylindrical wall. Further, around both ends of the mandrel case 23, an arm 25 swinging by a shaft 27 is provided, and a plurality of rollers 22 are suspended from the arm 25. A pinch roll 20 is provided on an arm 21 that swings around a shaft 26 at a position facing a paper supply/discharge hole 24. Pinch roll 20-1 and pinch roll 20
-2 has different diameters and is provided with a rotation drive device in the direction of the arrow shown in the figure.

A plurality of swing rollers 22 (five shown in the figure) have a built-in driving device (not shown) for swing motion, and expand and contract in diameter by the swing motion, and when expanded, the inner hole of the coil 30 to facilitate the laying of the inner paper. pinch roll 20
The surface of the inner paper 16 is coated with a coating layer of fluororesin, polyethylene, etc. to prevent the inner paper 16 from adhering to the roll. It is also preferable that the inside of the mandrel case be coated in a similar manner.

The pinch roll 20 is given a swing motion similar to the swing roll 22, and is also separately provided with a drive mechanism (not shown) so that the entire mandrel 17 rotates. Mandrel 17 mentioned above
is loaded onto a traveling trolley and allows the mandrel to be inserted into the coil inner hole.

Next, a method for laying the inner paper according to the present invention will be explained.

Figures 3a to 3g are illustrations of the operation of the present invention. In the figure, first, the inner circumferential paper 16 is supplied from the supply/discharge hole 24 by driving the pinch roll 20 (Figure a), and is stored in the mandrel case 23. Immediately before the tail end P of the inner paper passes through the pinch roll 20, the drive of the pinch roll 20 is stopped. (Figure b). Therefore, the inner paper 16 is stored in the mandrel case with its tail end P being held between the pinch rolls 20. Adhesive glue 18 is applied to one side of the leading edge of the inner circumferential paper, and is fed into the mandrel case in such a direction that the glue surface faces inward.

The mandrel 17 is then inserted into the inner hole 3 of the coil 10.
Moved and inserted to 0. Inner hole 30 of mandrel 17
When inserting the mandrel into the coil, it is preferable to center a cart (not shown) on which the mandrel is loaded in advance with the coil. After setting the mandrel 17 in the coil inner hole 30, a swing motion is applied to the arm,
The pinch roll 20 and the swing roll 22 are expanded, and the pinch roll 20-1 and the swing roll 22 are pressed into the inner hole 30 (Figure C).

The tail end P of the inner paper 16 is pinched by the pinch rolls 20, but the pinch rolls 20-1 and 20-2 have different roll diameters, so
As the arm 21 expands, the pinch roll 20-1 comes into contact with the inner wall of the coil. pinch roll 20
is released from the drive system and rotates freely. Next, when the mandrel 17 is rotated in the direction of the arrow d in FIG. 3, the pinch roll 20-1 rotates due to contact with the inner wall of the coil, pulls out the inner paper being pinched from the mandrel, and then rotates the pinch roll 20-1. An inner paper is sandwiched between 20-1 and the inner wall of the coil.

Further, while rotating the mandrel, the inner circumferential paper is laid along the inner wall of the coil. At this time, the tail end P of the inner circumferential paper is located at the rotation start point of the mandrel and is sequentially pressed by the swing roll (FIGS. d and e).

Adhesive glue 18 is applied to the overlapping portion of the inner paper, so that the tail end P of the inner paper
is crimped onto the adhesive glue 18 to complete the laying of the inner paper (Figure f).

When the laying of the inner paper is completed, the swinging motion of the swing roll and pinch roll is closed to reduce the diameter (Fig. g), the mandrel is moved out of the system, and it is returned to the initial position.

FIG. 4 shows another embodiment of the invention. In the drawing, the heater roll 31 has a built-in heating source not shown in the drawing, and when expanded by the arm 25 in the same manner as the swing roll 22, it presses the inner circumferential paper into the inner hole of the coil.

In this embodiment, a heat-sensitive adhesive glue is applied to the leading edge of the inner paper 17 in advance. The other figure symbols are the same as those shown in the second figure and will therefore be omitted.

However, according to this embodiment, the tail end of the inner paper is
After inserting and setting the mandrel into the inner hole of the coil while being held by the pinch rolls, the pinch roll, swing roll, and heater roll are expanded as described above, and the inner paper is laid in the inner hole of the coil.

Next, overlap the edges of the inner paper,
After crimping with pinch rolls and swing rolls, then applying electricity to the heater roll and crimping with the heater roll, the overlapping portion of the inner paper can be easily glued by the electric shock type adhesive at the tip of the inner paper. will be held.

FIG. 5 shows yet another embodiment of the invention. In this embodiment, a vacuum roller 42 is rotatably provided on the pinch roll 20-1 by an arm 43. An adhesive tape cartridge 40 is provided on a pedestal 46 at a position corresponding to a vacuum roll 42 (hereinafter referred to as a taping roll). 44 is an inner paper trailing edge detector. Other symbols are number 2
Since it is the same as shown in the figure, it will be omitted.

According to this embodiment, the inner paper 16 supplied from an external device is supplied to the pinch roll 20 via the leveler 15, and the inner paper is stored in the mandrel case by rotation of the pinch roll 20. The tail end of the inner paper is detected and the drive of the pinch rolls is stopped while it is being held between the pinch rolls.

Next, the adhesive tape 41 is placed on the taping roll 42 with the adhesive tape 41 facing outward and the adhesive tape 41 is sucked and held by vacuuming, and then the arm 43 is rotated in the inner circumferential direction to form a group of swing rolls with a reduced diameter. Stop it inside the circle (shown by the dashed line).

Next, according to the procedure shown in the second figure, the inner circumferential paper 16 is laid around the inner circumference of the coil. When laying the inner paper,
The tail end detector 44-2 detects the point at which the inner paper 16 ends coming out of the mandrel case, uses this as a starting point to predict the end position of the inner paper on the inner wall of the coil, and moves the arm 43 of the taping roll 42. Start in the outer circumferential direction and apply the tape at the overlapping portion of the inner circumferential paper.

The present invention has been mainly described above in terms of a method in which the inner paper is housed in a mandrel case and subsequently laid in the coil inner hole using the pressing force of pinch rolls, but the present invention is of course limited to this. Instead, for example, in order to assist the rotation of a pinch roll, swing roll, etc., the same effect can be obtained by applying a very weak rotational driving force while in contact with the inner wall of the coil. Measures such as providing a storage pocket do not depart from the scope of the present invention.

(Effects of the Invention) According to the present invention, the inner paper cut into a predetermined length in advance is stored with the tail end of the inner paper being held between the pinch rolls by driving the pinch rolls, and then With the pressing force, the pinch rolls are switched to non-driving mode and the inner paper is laid on the inner wall of the coil, making it possible to wrap the inner hole of the coil fully automatically.

In addition, since the pinch roll and swing roll can be expanded and contracted by the arm, they can be operated without any problems with fluctuations in the inner diameter of the coil.Furthermore, when storing the inner paper in the mandrel case, the shape of the coil end , due to loosening of the inner winding of the coil, wrinkles, etc.
The fear of paper tearing is also eliminated, and the industrial effect is great.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the flow of the present invention, FIG. 2 is a schematic cross-sectional diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram of the operation of the embodiment of the present invention, and FIG. FIG. 5 is a schematic cross-sectional view of still another embodiment of the present invention. 10: Coil, 11: Paper roll, 16: Inner paper, 20: Pinch roll, 21: Arm, 22:
Swing roll, 23: Mandrel case, 3
1: Heater roll, 42: Taping roll.

Claims (1)

[Scope of Claims] 1. A pair of expandable and contractible pinch rolls and a plurality of swig rolls are arranged around the outer circumference of a cylindrical mandrel, and wrapping paper cut into a predetermined length in advance is fed and discharged from the mandrel via the pinch rolls. Introducing the wrapping paper into the hole, storing it in a ring-wound manner in a mandrel case, and reducing the diameter of the pinch roll and swing roll while holding the tail end of the wrapping paper between the pinch rolls, and inserting the mandrel into the inner hole of the coil. Next, while holding the tail end of the wrapping paper, a pinch roll is expanded in diameter and pressed against the coil inner hole wall, and a swing roll is expanded in diameter and pressed against the coil inner hole wall, and then the mandrel is rotated. Start, and while rotating the mandrel, the ring-wound wrapping paper is unwound by contact with the coil inner hole wall of the pinch roll and the pressing force of the swing roll, and the wrapping paper is laid in the coil inner hole. A method for packaging an inner hole of a metal coil, characterized by: 2 A pair of expandable and contractible pinch rolls and a plurality of swing rolls are arranged around the outer periphery of a cylindrical mandrel,
Wrapping paper cut in advance to a predetermined length is introduced into the supply/discharge hole of the mandrel via a pinch roll, stored in a ring-wound manner in a mandrel case, the tail end of the wrapping paper is held between the pinch rolls, and the Adhesive tape is vacuum-adsorbed with the adhesive surface facing outward onto a vacuum roll that is swingably supported by a pinch roll, the pinch roll and swing roll are reduced in diameter, the mandrel is inserted into the inner hole of the coil, and then the packaging is carried out. While holding the tail end of the paper, expand the diameter of a pinch roll and press it against the wall of the inner hole of the coil, expand the diameter of a swing roll and press it against the wall of the inner hole of the coil, and then start rotating the mandrel, While rotating the mandrel, the ring-wound wrapping paper is unwound and laid in the coil inner hole by contact with the coil inner hole wall of the pinch roll and the pressing force of the swing roll, and the unwinding end of the wrapping paper is detected. 1. A method for packaging an inner hole of a metal coil, characterized in that the adhesive tape is attached to the overlapped portion of the wrapping paper.