JPS62208324A - Method of bending packing paper for metallic band coil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for neatly folding the end face of a wrapping paper for a metal band coil such as a copper band.

(B) Prior Art Metal band coils such as copper bands are shipped after being neatly wrapped in wrapping paper to prevent rusting and scratches. Traditionally, this packaging work was done manually. An example of this packaging work will be briefly explained with reference to FIG.

The metal band coil 1 is placed on a coil stand 2 and transported at a predetermined pitch. Workers are waiting on both sides of the conveyance line and perform predetermined tasks.

First, the wrapping paper 3 is wrapped around the outer circumference of the coil 1 (B). Next, the edges of the wrapping paper 3 are folded (C), the edges are folded (■), the center part is pushed into the hole of the coil, and finally, tape is pasted to the pushed part to fix it.The wrapping process in step n requires a lot of effort. This process is time-consuming and requires automation. Therefore, several automatic packaging devices have been proposed, but all of them are complex and costly equipment and have not been put into practical use.

The reason for this is that the wrapping paper itself is weak and difficult to handle, the width and diameter of the metal band coil varies, and the coil has a large weight. This is because it requires a machine.

JP-A-59-199417 discloses a method and apparatus for forming coil end wrapping folds. This method involves holding and folding the edges of the wrapper with a pleating rod having multiple air suction holes. However, with this method, as the outer diameter of the coil increases, it becomes difficult to bend the ears, and it is also difficult to form well-shaped pleats when the center of the coil and the center of the bending device are misaligned.

Therefore, the present applicant has disclosed an automatic device that can quickly and reliably package metal strip coils using as simple equipment as possible without making any major changes to the existing equipment (Japanese Patent Application No. 137,629/1982).

However, this device does not work well when the wrapping paper is folded (8th
Figure (D)) When the outer diameter of the coil becomes larger, the shape of the inside of the folded selvage becomes uneven, resulting in a poor yield of wrapping paper. The width must also be increased, making it difficult to apply the tape.

(c) Problems to be solved by the invention Problems to be solved by the invention include differences in the quality of wrapping paper, changes in the coil diameter, and deformation in the outer diameter of the coil.

To provide a wrapping paper folding method that can obtain uniform images even when coils are misaligned.

B) Means for Solving the Problems The method of folding wrapping paper for a metal band coil of the present invention involves wrapping wrapping paper around the outer periphery of a metal band coil, and folding down the edges of the wrapping paper that protrude from the end face of the coil. In the method, the folding mechanism is folded by a predetermined angle in the circumferential direction of the coil, and the bent tab is folded down onto the coil end surface. , arranging the folding mechanism so as to be inclined at a predetermined angle with respect to the coil diameter direction; setting the ear pinching force of the folding mechanism to a predetermined value; and the center of the radius of the folding mechanism. The above problem is solved by setting the point at a predetermined position inside the outer periphery from the end face of the coil.

(E) Embodiment The method based on the present invention is applied to the "packaging apparatus for metal band coils" disclosed in Japanese Patent Application No. 137629/1983 filed by the applicant mentioned above. First, the structure and operation of this device will be briefly explained with reference to FIGS. 3 to 7.

The packaging device 10 includes a cart unit 20. Support mechanism 30, expansion/contraction mechanism 40. Folding mechanism 50. Folding temporary operation mechanism 60. Drum rotation mechanism 70. If necessary, it is made up of an ear droop correction mechanism 80.

As shown in FIGS. 3 and 4, the truck unit 20 includes a first truck 21. Lifting platform 22. It is made up of a second truck 24. The trolley unit 20 positions the folding mechanism 50 and the like at a predetermined work position, and also performs joint operations to perform a predetermined work.

In FIG. 3 and FIG. 4, the trolley unit 20 has a plurality of wheels 210 provided on both sides of the coil trolley 20.
a pair of guide rails 1 arranged at right angles to the direction of movement of the
1, a lifting platform 22 that is movable up and down and guided by pillars 211 that are fixed upright at the four corners of the first truck, and a plurality of elevators provided on both sides. The second cart 2 is movable on a pair of guide rails 23 fixed on the lifting platform 22 by wheels 240.
4. The first truck 21 has four screw shafts 25.
is rotatably mounted in an upright position. Screw shaft 2
A bearing 221 of the lifting table 22 is screwed into the shaft 5, and the lifting table 22 can be moved up and down by rotation of the screw shaft 25.

The screw shafts 25 are simultaneously rotated by a drive mechanism 26 of a known structure including a motor 260. In addition,
The first cart and the second cart are each independently moved by a known drive mechanism (not shown) including an electric motor.

As shown in FIGS. 4 and 6, the support mechanism 30 includes struts 31. It is made of a hollow shaft 32 and functions to support the expansion/contraction mechanism 40 and the like.

The support column 31 is fixed perpendicularly to the rear end of the second truck 24.

One end of the hollow shaft 32 is fixed to the upper part of the support column 31, and extends in a cantilevered manner parallel to the moving direction of the second truck 24.

Conventional end caps 811 are attached to both ends of the hollow shaft 32.

As shown in FIGS. 4 and 6, the expansion/contraction mechanism 40 includes a drum 41. Screw shaft 42. Nut member 43° drive device 44
It functions to move the nut members 43 at the same position in the radial direction of the drum 41 all at once in synchronization.

The drum 41 has an outer circumferential blowfish 411. It is made up of a central boss 412 and side frames 413.

Central boss 412 is rotatably attached to the free end of hollow shaft 32. Side frame 413 is central boss 412
It extends radially from the outer ring 411 to the outer ring 411.
11 are arranged at a predetermined pitch (18 degree intervals in this embodiment) in the circumferential direction.

The outer ring 411 is rotatably supported by a row 272, which will be described later.

The screw shaft 42 extends radially between the central boss 412 and the outer ring 411 at the center of each side frame 413, and is rotatably supported. The screw shafts 42 are arranged at predetermined pitches (18 degree intervals in this embodiment) in the circumferential direction of the outer ring 4110.

A radially inner end of each screw shaft 42 extends through and into the central boss 412.

A small bevel gear 421 is fixed to its tip,
It is engaged with a large bevel gear 441 which will be described later.

A radially outer end of one or more of the threaded shafts 42 extends through the outer ring 411, and a sprocket 422 is fixed to the tip thereof.

The sprocket 422 is driven by a motor 442, which will be described later, through a chain.

The driving device 44 includes a large bevel gear 441 and a motor 442.
It is made up of. Large bevel gear 441 is central boss 4
It is rotatably attached to a hollow shaft 32 within 12 . Large bevel gear 441 engages each small bevel gear 421 as described above. The motor 442 is the outer circumferential blowfish 4
It is fixed to the side frame 413 near 11,
The output shaft is connected to the sprocket 422 through a chain as described above.

The nut member 43 engages with the screw shaft 42 and is slidably engaged with the side frame 413 in a state where rotation is prevented. When the screw shaft 42 is rotated, the nut member 43 moves along the screw shaft 42 in the radial direction of the outer ring 4110. Each nut member 43 is initially set to the same radial position.

As shown in FIGS. 4 and 6, the drum rotation mechanism 70 includes a fluid pressure cylinder 71. It is made up of rollers 72.

One end of the fluid pressure cylinder 71 is rotatably attached to the second truck 24, and the other end is rotatably attached to the outer ring 411.

The rollers 72 run parallel to the second cart 24 at a predetermined interval.
It is rotatably attached to and rotatably supports the outer ring 411.

The fluid pressure cylinder 71 functions to rotate the outer circumferential ring 411 by a predetermined angle θ (preferably two circumferential pitches of the screw shaft 42).

As shown in FIGS. 4, 6, and 7, the folding mechanism 50 includes a horizontal arm 51. First folding plate 52° Second folding plate 53
．． Third folding plate 54. The folding mechanism 50, which is made up of an ear tab 55° actuating member 56, pinches and folds the wrapping paper ears protruding from the metal strip coil toward the end face of the coil, and then folds the peaks of the ears in the circumferential direction. It has the ability to lie down.

The horizontal arm 51 is fixed to the nut member 4 while extending in a direction perpendicular to the screw shaft 42, that is, in a horizontal direction.

A first folding plate 52 is fixed to one end of the horizontal arm 51,
The other end passes through a movable frame 62, which will be described later, and engages with a fixed frame 61 so as to be slidable in the radial direction.

The second folding plate 53 is rotatably attached below the tip of the first folding plate 52, and the third folding plate 54 is rotatably attached above the tip of the first folding plate 52. The ear knob 55 is attached to the second folding plate 5 below the tip of the first folding plate 52.
3 and is rotatably attached to the first folding plate 52.

The second folding plate 53 functions to clamp the ears in conjunction with the ear knobs 55. In order to perform this operation smoothly and reliably,
It is preferable that the second folding plate 53 has a conventional suction function.

The sixth folded plate 54 is selectively used depending on the diameter of the metal band coil 1. For example, when the coil diameter is relatively large, it is rotated to the position shown by the two-dot chain line in FIG.

The actuating member 56 is a hydraulic cylinder 561. 1st series rod 562
．． Second series 563. 564° 2nd lever 565
．． It is made up of a first pinion 566 and a second pinion 567.

One end of the fluid pressure cylinder 561 is rotatably attached below the rear end of the first folding plate 52, and the other end is attached to the ear knob 5.
It is rotatably attached to one end of 5. For example, when the piston rod is pushed out in the direction of the arrow, the fluid pressure cylinder 561 rotates the ear knob 55 counterclockwise.

One end of the first continuous rod 562 is rotatably attached to one end of the first lever 564, and the other end is rotatably attached to the other end of the second folding plate 53. The other end of the first lever 564 is fixed to the first pinion 566, and the first pinion 564
6 is rotatably attached to the first folding plate 52.

A first pinion 566 engages a first rack 64, which will be described below.

When the first pinion 566 is rotated counterclockwise, the second folding plate 53 is rotated counterclockwise.

One end of the second continuous rod 563 is rotatably attached to one end of the second lever 565, and the other end is attached to the sixth folding plate 54.
Rotatably attached to the other end. Second lever 565
The other end is fixed to a second pinion 567, and the second pinion 567 is rotatably attached to the first folding plate 52. The second pinion 567 is engaged with a second rack 65, which will be described later.

When the second pinion 567 is rotated counterclockwise, the third folding plate 54 is rotated clockwise.

As shown by the two-dot chain line in FIG. 7, when the second folding plate 53 and the third folding plate 54 are rotated to the maximum, they coincide with the tip of the first folding plate 52, and each plate Edges are aligned on a line. This alignment edge will be parallel to the coil end face.

The temporary folding mechanism 60 is shown in FIG. Uni, fixed frame 61. Moving frame 62. Fluid pressure cylinder 63. First rack 64. It is made up of a second rack 65. The temporary folding operation mechanism 60 functions to rotate the second folding plate 53 and the third folding plate 54.

The fixed frame 61 is rotatably supported by the hollow shaft 32 and restrained from moving in the axial direction. A movable frame 62 is rotatably and slidably attached to the hollow shaft 32 between the fixed frame 61 and the expansion/contraction mechanism 40. A fluid pressure cylinder 63 is connected between the fixed frame 61 and the moving frame 62.

The rear ends of the twelfth rack 64 and the second rack 65 are slidably engaged with the long grooves 621 of the moving frame 62, respectively. The rear end of the horizontal arm 51 passes through the movable frame 62 and is slidably engaged with a guide 611 provided on the fixed frame 61.

In this embodiment, there are 20 folding mechanisms 50, as shown in FIG. 4, and they are provided in the expansion/contraction mechanism 40 at constant circumferential pitches. Each horizontal arm 51 and each first rank 64 . Each of the twenty-second claws 65 is engaged with a corresponding number of guides 611 and long grooves 621, respectively.

Depending on the quality of the wrapping paper, it may be necessary to provide the ear droop correction mechanism 80. As shown in FIG. 6, the ear droop correction mechanism 80 includes a second hollow shaft 81. Fluid pressure cylinder 82 * horizontal bar 83. Sprocket 84. It is made up of a motor 85.

The second hollow shaft 81 is rotatably fitted inside the hollow shaft 32. A fluid pressure cylinder 82 is attached to the free end of a second hollow shaft 81 that protrudes from the front end of the hollow shaft 32 (on the right side in FIG. 6).
1 and fixed vertically. A horizontal bar 83 is fixed to the tip of the piston rod of the hydraulic cylinder 82 parallel to the axis 81 . By actuating the hydraulic cylinder 82, the horizontal bar 83 can be moved in the radial direction of the shaft 81.

A tin rocket 8 is fixed to the free end of a second hollow shaft 81 that protrudes from the rear end of the hollow shaft 32 (left side in FIG. 6).

Sprocket 84 is driven by a motor 85 fixed to the top of column 31.

When the sprocket 84 is driven, the horizontal bar is aligned with the shaft 8.
Rotate around 1.

Conventional end caps 811 are attached to both ends of the second hollow shaft 81 .

Next, the operation of this device will be briefly explained.

As shown in FIGS. 3 and 4, first, the entire apparatus 10 is guided by the first cart 21 and the lifting platform 22 to the standby position of the metal strip coil 1 around which the wrapping paper 3 is wrapped. The lifting platform 22 adjusts the center position of the device 10 in accordance with changes in the coil diameter.

If the wrapping paper is not stiff, it may cause swelling of the wrapping paper. Therefore, if necessary, the ear droop correction mechanism 80
First, the ear discharge is corrected using the second cart 24.

To perform this correction work, first, the folding mechanism 50 is retracted to the maximum radius position of the drum 41, and the horizontal bar 83 is retracted to the minimum radius position of the drum 41. Then the second
The cart 24 is advanced and the horizontal bar 83 is inserted inside the selvage of the wrapping paper 3. The horizontal bar 83 is raised to the outer diameter position of the coil 1 and made to go around the inside of the ear. This operation corrects normal ear discharge. After correction, the horizontal bar 83 is lowered and the second truck 24 is moved backward.

Next, the folding mechanism 50 pinches the edges of the wrapping paper 3, and the expansion/contraction mechanism 40 and the second cart 24 are operated to bend the edges toward the end surface of the metal band coil 1 and in the inner diameter direction (FIG. 9(A)). ). After the folding is completed, the folding mechanism 50 is rotated by a predetermined angle θ by the drum rotating mechanism 70 to fold the ears (FIG. 9(B)).

First, as shown in FIG. 7, the second folding plate 53 is held in a horizontal position, and the expansion/contraction mechanism 40 is operated so that the second folding plate 53 is positioned slightly outside the radial position of the ear. . Next, the second cart 24 is moved forward and stopped when the ear is between the ear knob 55 and the second folding plate 53.

The ears are clamped between the ear knobs 55 and the second folding plates 53, and the expansion/contraction mechanism 40 moves the horizontal arms 51 inward in the radial direction of the drum 410 all at once, and the second cart 24 is moved forward. This linked operation is controlled so that the ear tab 55 and the second folding plate 53 draw an arcuate locus (FIG. 2). Further, the ear knob 55 and the second folding plate 53 sequentially rotate counterclockwise on an arcuate trajectory. The rotational movement is controlled by the actuating member 56 and the temporary folding actuating mechanism 6o.

In this way, the ears are bent in the inner diameter direction toward the end face of the coil 1.

Next, the drum rotation mechanism 70 is activated to rotate the folding plate mechanism 50 in the circumferential direction of the drum 41 by a predetermined angle θ.

At this time, the folded peaks of the ears are folded down. When the coil diameter is large, a third folding plate 54 is also used.

The selvage pressing and tape application are performed by another tape application device (not shown) which is on standby in the next process.

In the metal band coil packaging apparatus described above, the method of the present invention is applied as follows.

First, the above-mentioned folding mechanism 50 is arranged so as to be inclined by a predetermined angle β with respect to the diameter direction of the metal band coil 1.

Although FIG. 1 is substantially the same as FIG. 4, each component is omitted for convenience of explanation. In FIG. 1, the plurality of dashed-dotted lines 42 correspond to the screw shafts 42 described above. Moreover, the plurality of dashed-dotted lines 50 indicate the nut member 43. It corresponds to the center line (with respect to the diametrical direction of the drum 41) of the folding mechanism 50 which is attached by the horizontal arm 51. The front surface of the drum 41 faces the end surface of the metal band coil 1. Angle θ
1 indicates the pitch angle of the screw shaft 42.

As shown in FIG.
Let β be the angle between the center line of the folding mechanism 5o (diameter direction) and the center line of the folding mechanism 5o. When the symbols shown in FIG. 9 (8) are defined as below, the angle α is expressed by the following equation (1).

D8: Coil outer diameter D2: Coil inner diameter A: Folding allowance
K: Ear-folding distance (='2"" A) γ: Ear-folding angle
h: Maximum fold height α: Fold angle β: Torsion angle dI: Minimum lug diameter d2: Maximum lug diameter Therefore,
The unevenness of the ear end portion is expressed by the numerically larger equation of the following equations (2) and (3).

Since it is skewed, it is possible to obtain a product with less unevenness at the edge end.

The reason is that from equations (2) and (3), when β: O or α, the first term is the maximum, the second term is the minimum, and the second
The term becomes large.

As for the operation, in the folding process, a fold is made, and then folded down by a folding mechanism that shifts by an angle q.

In this way, the folded ridge of the ear is inclined by an angle α as shown in Figure 10, and the unevenness of the folded ear is
The result is as shown in Figure (B).

Next, the ear pinching force of the folding mechanism 50 described above is set to a predetermined value. This ear pinching force varies depending on the paper quality, but
It is preferable that the selvage tab 55 should be within a range that causes a moderate amount of slippage when the selvage of the wrapping paper 3 is pinched and folded.

By causing slippage in this way, when the wrapping paper sag or when the coil outline springs up,
This is preferable because no excessive force is applied to the wrapping paper when the coil misalignment occurs.

Finally, the center point of the edge bending radius of the folding mechanism is set at a predetermined position inside the outer periphery from the end surface of the metal coil. for example,
As shown in FIG. 2, according to normal edge bending, the locus of the edge ends looks like a chain double-dashed line. Center point 01 of this arc
is on the outer periphery of the end face of the coil 1. However, in the method of the present invention, the center point 01 is eccentrically inward from the end face of the coil 1 by a distance e.

In this way, when folding the ears, use the ear knobs 55.
The locus looks like a solid arc. The locus of this eccentric arc and the sliding of the ear tabs allow the ears to be folded smoothly and effortlessly.

A suction disk is usually used as the ear knob 55, and its suction force is preferably about -100 to -300 m blade. Further, the eccentricity e is preferably about 1 to about 1 to the sum of the outer diameter of the coil.

(G) Effects According to the metal band coil packaging apparatus of the present invention, the following effects can be obtained.

■ Since the unevenness at the tip of the selvage folding portion is reduced, the selvage can be perfectly taped to the inner diameter surface of the coil, and the tape width can also be reduced.

■ Eliminates curls and wrinkles in wrapping paper.

[Brief explanation of drawings]

FIG. 1 is a front view of a drum illustrating the method of the present invention. FIG. 2 is a longitudinal sectional view of a metal coil illustrating the method of the present invention. FIG. 3 is a side view of an apparatus to which the method of the invention is applied. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a partial sectional view taken along line V-V in FIG. 4. FIG. 6 is a longitudinal cross-sectional view of the main parts of an apparatus to which the method of the present invention is applied. FIG. 7 is an enlarged side view of the folding mechanism. FIG. 8 is an explanatory diagram showing the packaging process for metal band coils. FIG. 9 is a front view showing the result of folding wrapping paper using a conventional device. FIG. 10 is a front view showing the result of folding wrapping paper according to the method of the present invention. 10: Packaging device 20: Cart unit 30: Support mechanism 40: Expansion/contraction mechanism 50: Folding mechanism 6
0: Temporary folding mechanism 70 Nidrum rotation mechanism 80: Ear droop correction mechanism Patent applicant Sumitomo Metal Industries, Ltd. (1 other person) (5 other people) Figure 10 (B)

Claims (1)

[Claims] Wrapping paper is wrapped around the outer periphery of the metal band coil, the edges of the wrapping paper protruding from the end surface of the coil are pinched by a folding mechanism, the edges are folded in the inner radial direction of the end surface of the coil, and the folding mechanism is rotated around the circle of the coil. In the method of folding the folded ears onto the end face of the coil by rotating the folded ears by a predetermined angle in the circumferential direction, the folding mechanism is arranged to be inclined by a predetermined angle with respect to the coil diameter direction, A wrapping paper for a metal band coil, which comprises: setting the ear pinching force of the folding mechanism to a predetermined value; and setting the center point of the edge bending radius of the folding mechanism to a predetermined position inside the outer periphery from the end surface of the coil. Bending method.