JP2780593B2 - Automatic strapping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically applying a band to an unsuitable coil end portion generated during coil rolling.

[0002]

2. Description of the Related Art When a rolled material such as aluminum is cold-rolled by applying a predetermined tension and wound on a spool, the leading end of the rolled material, that is, the portion from the rolling mill to the spool, has a predetermined rolling dimension. Instead, it is wound on a spool as an unsuitable coil end (hereinafter referred to as an off-coil) and cut and separated from the coil in the next rolling step. The off-coil cut and separated from the coil remains in a state of being wound on the spool, and after the spool is removed, is re-melted and used as a rolled material. Uncoiler (coil rewinding machine) for off-coil wound on the spool
At the time of removal, a band is applied in advance so that the off-coil does not loosen or the cut end of the off-coil does not jump due to tension. Such banding work and spool removal work have conventionally been performed by workers, but since the work itself is inefficient and dangerous,
Robotic automation was urgently needed. Therefore, the present applicant has already proposed a spool / coil terminal separating and extracting apparatus (Japanese Utility Model Laid-Open No. 4-75607). This device is configured to automatically and consecutively perform a banding operation, an operation of loosening the winding of the off-coil around the spool, and an operation of extracting the spool. Of these three operations, the banding operation, in particular, employs a configuration in which an annular band stored in the band supply device is caught by the arm of the banding device, transported to the band mounting position, and fitted to the off coil of the spool. I have. The band is formed with a dimensional allowance so as not to interfere with the coil at the time of fitting to the off-coil while allowing for the allowance for the spread of the off-coil.

[0003]

As described above, in the conventional banding apparatus, the band diameter is provided with a dimensional margin to facilitate the fitting to the off-coil, so that the tension of the off-coil is weak. In this case, the contact between the band and the off-coil is weak, so that there is a problem that the band is shifted or comes off from the off-coil. In particular, when the band comes off, an unexpected accident such as the cut end of the off-coil springs off due to the tension and the operator jumps off is dangerous.

[0004] Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to ensure that the band can be in close contact with the outer periphery of the off-coil, so that the band can be displaced or removed. It is an object of the present invention to provide an automatic banding device capable of preventing the occurrence of the above.

[0005]

According to a first aspect of the present invention, there is provided an automatic banding apparatus for fitting an annular band around an unrollable coil terminal wound around a spool. A swing arm arranged to be pivotable about an axis and movable back and forth in the axial direction between the band supply position and an arm pivoting drive device for pivoting the swing arm around the axis; A drive device for moving the arm forward and backward, a mandrel that is rotatably disposed at the tip of the swing arm, suspends and holds the band at the band supply position, conveys the band to the band mounting position, and fits the coil terminal portion; By rotating the mandrel, the band is twisted to reduce the diameter of the band, and the mandrel drive is brought into close contact with the coil end portion. It is intended a device. In a second aspect based on the first aspect, the mandrel includes a shaft portion rotatably supported by the swing arm, a cylindrical portion integrally connected to one end of the shaft portion, A pushing means and a pushing means for pushing the band out of the mandrel, the cylindrical portion has a pair of left and right slits into which the upper part of the band is inserted, and the pressing means is inserted into the cylindrical portion from the slit. Press the band part down,
The pressing means and the pair of slits hold the band at three points.

[0006]

In the present invention, the mandrel is fitted to the coil end portion and then rotated by the mandrel driving device to twist the band and reduce its diameter. As a result, the band is brought into close contact with the outer periphery of the coil terminal portion, thereby preventing the band from slipping out of the coil terminal portion and the like.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. 1 to 11 show an embodiment of an automatic strapping device according to the present invention. FIG. 1 is a partially cutaway front view of the device, FIG. 2 is a plan view of the device, and FIG. FIG. 4 is a side view, FIG. 4 is a plan view showing a positional relationship between the device, a band mounting position, a band supply position and an off coil, FIG. 5 is a front view of a swing arm, FIG.
7 is a partially cutaway side view of the arm, FIG. 8 is a cross-sectional view of the mandrel, FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8, and FIG. 10 shows a state in which the mandrel is rotated to twist the belt. FIG. 11 is a sectional view taken along line XI-XI of FIG.
3 and 4, reference numeral 1 denotes a payoff reel disposed at a band mounting position A, 2 denotes a band supply device disposed at a band supply position B, and 3 denotes an intermediate position between the band mounting position A and the band supply position B. Is an automatic banding device arranged in the company. The payoff reel 1 is provided with a mechanism (not shown) for holding a coil for rolling and for pushing out a coil end portion that is unsuitable for rolling after rolling is completed, that is, a spool 5 around which the off coil 4 is wound. The band supply device 2
A column 6, a band support 8 provided on the upper surface of the column 6 so as to be able to move forward and backward, and a plurality of (up to 11) bands 7 being hung at predetermined intervals; and an air cylinder for moving the band support 8 forward and backward. And other appropriate driving devices (not shown). The band support 8 is disposed parallel to the axis of the payoff reel 1. The band 7 is formed in a ring shape by joining both ends of a band-shaped body made of an aluminum alloy or the like having an appropriate width and plate thickness (for example, width 24 mm, plate thickness 1.2 mm). Further, the band 7 is formed with a dimensional allowance in order to avoid the interference with the off coil 4 when the band 7 is fitted to the off coil 4 while taking into account the spread of the off coil 4. For example, when the outer diameter of the off-coil 4 is about 525 mm to 600 mm, the diameter of the band 7 is about 650 mm.

The automatic banding device 3 is for mounting the band 7 so that the outer diameter of the off-coil 4 does not become too large. The gantry 10 disposed at the midpoint between the band mounting position A and the band supply position B is mounted on the gantry 10. As shown in FIGS. 1 and 2, a track rail 11 is provided on the gantry 10 so that the track rail 11 is movable in a horizontal direction. Track rail 1
Numeral 1 is formed in a rectangular rod shape, and is movably held by a total of twelve rotatable cam followers 12, four on the upper and lower surfaces and two on the left and right side surfaces. The cam follower 12 is rotatably provided on a bracket 13 provided on the gantry 10, and a hydraulic motor 14 is provided on the bracket 13 as a driving means for moving the track rail 11 forward and backward. . Hydraulic motor 1
A toothed pulley 16 is fixed to the output shaft 15 of FIG.
On the other hand, a timing belt 17 is disposed on the upper surface of the track rail 11 with both ends fixed by pressing plates 18, and an intermediate portion of the timing belt 17 is meshed with the toothed pulley 16 from above. The timing belt 17 is provided with a pair of idle rollers 19 rotatably disposed on the bracket 13 at positions before and after the toothed pulley 16 in order to more reliably engage with the toothed pulley 16.
Is pressed downward. In the track rail 11 having such a configuration, the toothed pulley 16 rotates in the forward or reverse direction by driving the hydraulic motor 14,
When the timing belt 17 is moved leftward or rightward in FIG. 1, the track rail 11 moves forward and backward along the cam follower 12. The moving direction of the track rail 11 is parallel to the axial direction of the payoff reel 1. Although the toothed pulley 16 and the timing belt 17 are used as the reciprocating linear movement mechanism of the track rail 11, the present invention is not limited to this, and a pinion and a rack may be used.

On the front surface of the track rail 11, a swing arm 21 which is rotated in a vertical plane perpendicular to the axis of the payoff reel 1 is provided via an arm turning hydraulic motor 22. The swing arm 21 has an arm boss 24 formed of a tubular body integrally provided at an intermediate portion in the longitudinal direction.
The arm boss 24 is fitted and fixed to an output shaft 25 of the hydraulic motor 22 via a key 26 (see FIG. 6). A balance weight 27 formed in a sector shape in a side view is integrally provided at a base end of the swing arm 21, while a mandrel 28 is provided at a tip end. The mandrel 28 receives the band 7 from the band supply device 2, conveys it to the band mounting position A, fits it on the off coil 4, and then twists the band 7, and is rotatably arranged on the swing arm 21. Air oscillating motor 29
It is constituted so that it may be rotated. The distance from the center of rotation of the swing arm 21 to the mandrel 28 is substantially equal to the center-to-center distance between the payoff reel 1 and the automatic banding device 3 and the center-to-center distance between the band supply device 2 and the banding device 3. 7 can be transported to the band mounting position A and fitted to the off-coil 4.

The air oscillating motor 29 is disposed below the hydraulic motor 22 by being disposed below the front end of the track rail 11 via a bracket 31, and its output shaft 32 rotates up and down two times. Are transmitted to the mandrel 28 via endless timing belts 33 and 34 (see FIGS. 1, 5 and 6). The lower timing belt 33 located on the swing motor 29 side is
It is stretched between a toothed pulley 35 fixed to the output shaft 32 and a toothed pulley 37 rotatably disposed on the outer periphery of the arm boss 24 via a dry metal 36. The dry metal 36 is fitted and fixed to the arm boss 24, and the toothed pulley 37 has a width slightly more than twice the width of the timing belt 33 (34), and is rotatably fitted to the dry metal 36. The upper timing belt 34 is
It is stretched between the toothed pulley 37 and a toothed pulley 38 fitted and fixed to the outer periphery of the mandrel 28. The toothed pulley 35 is larger than the toothed pulley 37 (38), and the gear ratio is set to, for example, 36:28. A belt guide 39 (see FIG. 6) is fitted around the outer periphery of the arm boss 24, thereby restricting the axial movement of the arm boss 24.

The mandrel 28 has a middle portion rotatably supported at the tip of the swing arm 21 via a bearing 41 (see FIG. 8), and a hollow shaft to which the toothed pulley 38 is fitted and fixed. Belt 28 which is composed of a cylindrical portion 28A integrally provided at the tip of the shaft portion 28A, an air cylinder 42 attached to the base end surface of the shaft portion 28A, and a belt 7 fitted and mounted on the off-coil 4 inside. The mandrel 28
A plunger 43 as an extruding means for extruding the band 7 and a pressing means 44 for pressing and holding the band 7 are provided. The plunger 43 is disposed in the shaft portion 28A so as to be able to move forward and backward, and has one end connected to the piston 45 of the air cylinder 42 and the other end having a fan-shaped plate portion 43a (in the cylindrical portion 28B). 9) and the plate portion 4
The stopper 48 projecting from the top of the cylindrical portion 2a
Axial slit 47 formed in the upper part of the outer peripheral surface of 8B
Rotation is prevented by being inserted inside. A pair of left and right slits 50A and 50B (see FIG. 9) for holding the band 7 is further formed in the axial direction near the lower portion of the opening end surface of the cylindrical portion 28B. These slits 50A, 50
The opening B is tapered to facilitate insertion of the band 7. The pressing means 44 is provided with a screw hole 5 formed in the peripheral surface of the distal end portion of the plunger 43 so as to penetrate vertically.
A ball plunger 53 screwed into the ball plunger 2, a ball 55 disposed in the ball plunger 53 via a spring 54, and a part of the peripheral surface of which protrudes outside from a lower end side opening of the ball plunger 53; And a guide nut 56 integrally attached to the outer periphery of the lower end of the guide. The ball 55 is provided with the slits 50A and 50B.
And the guide nut 56
The central portion of the band 7 inserted into the cylindrical portion 28B from the slits 50A and 50B is pressed downward by the spring force of the spring 54. For this reason,
The band 7 includes a pair of slits 50A and 50B and a ball 5
5 holds three points.

Here, a pair of left and right slits 50A,
Although the band 7 may be elastically deformed into a drop shape due to the weight of the band 7 itself by holding the upper portion of the band 7 at 50B, the fitting to the off-coil 4 may become difficult.
When the center of the upper surface of the band 7 is pressed, the upper portion of the band 7 is elastically deformed so as to project downward as shown in FIG. 9 and both sides of the pressed portion are lifted. It is held stably and the fitting to the off-coil 4 is made easy and reliable. The lower surface of the guide nut 56 is formed in a convex curved shape to facilitate insertion of the band 7 into the cylindrical portion 28B.

The pressing means 44 normally holds the band 7 together with the slits 50A and 50B as shown in FIGS. 8 and 9, and holds the band 7 together with the slits 50A and 50B when the band 7 is removed from the mandrel 28. The plunger 43 moves forward with the driving of the air cylinder 42, so that the plunger 43 projects outside the cylindrical portion 28B as shown in FIG. When the pressing means 44 projects, when the plunger 43 moves forward, the plate portion 43a presses one end surface of the band 7, so that the band 7 is pushed out from the slits 50A and 50B and released from being held by the mandrel 28.

Next, the banding operation of the automatic banding apparatus 3 having the above configuration will be described. FIG. 4 is a diagram showing a state in which the band 7 hung on the band supply device 2 by the mandrel 28 is received. Swing arm 2
1 is located in front of the band supply device 2 and then moves backward by a predetermined distance integrally with the track rail 11 when the track rail 11 moves backward by driving the hydraulic motor 14. Then
First band 7 set in band supply device 2
Is held by the slits 50A and 50B of the mandrel 28 and pressed and held by the pressing means 44, whereby the operation of transferring the band 7 to the mandrel 28 is completed. After the band transfer operation is completed, when the track rail 11 is moved forward by a predetermined distance by the hydraulic motor 14,
The first band 7 held on the mandrel 28 is withdrawn from the band supply device 2. After the swing arm 21 is moved forward by a predetermined distance, the swing arm 22 is turned counterclockwise in FIG. 3 by a predetermined angle (eg, 1180 °) by driving of the swing motor 22, thereby conveying the band 7 forward of the payoff reel 1. If the swing motor 29 is set at the stroke end during the swing operation of the swing arm 21, the mandrel 28 is prevented from rotating due to friction regardless of the swing of the swing arm 21, and can maintain a constant posture. (FIG. 7). After the swing arm 21 is turned by a predetermined angle and stops moving in front of the payoff reel 1, the hydraulic arm 14 drives the swing arm 21 to retreat integrally with the track rail 11, and moves the band 7 held by the mandrel 28 as shown in FIG. The off-coil 4 is fitted at a predetermined position on the outer periphery as shown by a chain line. At this time, the cut end 4 of the off coil 4
a (see FIG. 9) is pressed against the off-coil by a pressing roller (not shown) to facilitate the fitting of the band 7. When the band 7 is fitted to the off coil 4, the mandrel 28 is rotated in the counterclockwise direction in FIG. When the band 7 is twisted in this way, the band diameter can be reduced, so that the band 7 can be securely in close contact with the outer periphery of the off-coil 4, loosening the off-coil 4, bouncing off the cut end of the coil, and shifting the band 7. , Falling off, etc. can be reliably prevented. In addition, since the band diameter can be given a dimensional margin, the operation of fitting the band 7 to the off coil 4 is easy,
There is an advantage that interference with the coil can be prevented.
After twisting the band 7, the air cylinder 42 is driven to move the plunger 43 forward (FIG. 10), and the pressing means 44 is projected outside the mandrel 28, so that the plate 43 a of the plunger 43 The band 7 is pushed out from the slits 50A and 50B by pressing one end face, and the operation of hanging the band 7 is completed.

After the off-coil 4 on which the band 7 is wound is removed from the pay-off reel 1 together with the spool 5 by an unshown pushing mechanism provided on the pay-off reel 1,
In the next step, it is loosened by swinging in the left-right direction, and is removed from the spool 5.

[0016]

As described above, the automatic banding device according to the present invention is configured so that the annular band is fitted to the off-coil and then twisted to reduce the diameter. The close contact can be ensured, and the loosening and bouncing of the off-coil, the displacement of the band, the displacement, and the falling off from the off-coil can be reliably prevented. Also,
Since the band diameter can have a dimensional allowance, it can be securely fitted without interfering with the off-coil, and the reliability and efficiency of the automatic banding operation can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an automatic strapping device.

FIG. 2 is a plan view of the same device.

FIG. 3 is a side view of the same device.

FIG. 4 is a plan view showing a positional relationship among the device, a band mounting position, a band supply position, and an off coil.

FIG. 5 is a front view of a swing arm.

FIG. 6 is a sectional view of a main part of the arm.

FIG. 7 is a partially broken side view of the arm.

FIG. 8 is a sectional view of a mandrel.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 8;

FIG. 10 is a cross-sectional view showing a state in which the band is twisted by rotating the mandrel.

11 is a sectional view taken along line XI-XI in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Payoff reel 2 Band supply device 3 Automatic banding device 4 Spool 5 Spool 7 Band 14 Hydraulic motor 21 Swing arm 22 Hydraulic motor for arm rotation 28 Mandrel 28A Shaft portion 28B Cylindrical portion 29 Air swing motor for mandrel 42 Air cylinder 43 Plunger 44 Pressing means 50A, 50B Slit A Band mounting position B Band supply position

Claims (2)

(57) [Claims] 1. An automatic banding apparatus for fitting an annular band around an end of a coil which is not suitable for rolling and wound around a spool, wherein the band is rotatable around an axis between a band mounting position and a band supply position and is in an axial direction. A swing arm arranged to be able to move forward and backward, an arm turning drive device for turning the swing arm around an axis, an arm moving drive device for moving the swing arm forward and backward, and a rotation at the tip of the swing arm. A mandrel that is freely disposed, holds the band at the band supply position, transports the band to the band mounting position, and fits the coil end portion, and twists the band by rotating the mandrel to give the band a twist. And a mandrel driving device for reducing the diameter of the coil and bringing the coil terminal portion into close contact with the coil terminal portion. 2. The automatic banding device according to claim 1, wherein the mandrel comprises: a shaft portion rotatably supported by a swing arm; and a cylindrical portion integrally connected to one end of the shaft portion. Pushing means and a pushing means for pushing out the band from the mandrel are provided in the cylindrical part, and the cylindrical part has a pair of left and right slits into which the upper part of the band is inserted, and the pressing means is located in the cylindrical part from the slit. An automatic banding device wherein the inserted band portion is pressed downward, and the pressing means and the pair of slits hold the band at three points.