JPH07300111A - Tying method for coil and tying machine - Google Patents

Abstract

PURPOSE:To provide a tying method wherein a strap does not slip off due to a vibration at the time of the transport of the coil, and in addition, the strap does not break by the expansion of the coil diameter due to heating. CONSTITUTION:A strap S is wound around an area to be tied on a coil C, and an area which is slightly backward from the leading end of the strap which is overlapped with the following part is gripped, and the leading end St of the strap is bent between the strap parts, which is wound around and formed into a loop shape, and the coil, and is pressed to the coil while producing a spring force of itself. Then, the following part of the strap is tightened while maintaining a specified gap between the gripped part G and coil. Then, the gripped part is tied, and the following part of the strap is cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil binding method (hereinafter simply referred to as a binding method) and a binding machine. More specifically, for example, when a metal coil such as a strip coil is bound by a metal band (hereinafter referred to as a strap) before a heating process such as annealing, the strap does not loosen and falls, and there is no risk of cutting the strap. The present invention relates to a method for bundling, and further a binding machine capable of suitably implementing this method.

The coil referred to in the present specification is not limited to a strip coil, but is used to include all metal materials wound in a coil shape, such as wire rod coils.

[0003]

2. Description of the Related Art Conventionally, when, for example, a strip coil or the like is annealed, the coils are previously bound with straps and then conveyed to an annealing furnace and covered with an annealing furnace for heating. Since the coil generally expands in diameter after being heated by annealing or the like, a certain treatment is required for binding with a strap.
This is because, if no measures are taken, the strap will be cut by the coil that expands after the annealing process or after annealing.On the other hand, if the strap wrapping force is weakened to avoid such cutting, it may occur during transportation. This is because the strap loosens due to vibration and falls off the coil.

In the past, each company tried to adjust the strap winding force variously to prevent the strap from being cut or falling off, but the desired effect has not been obtained.

The present invention has been made in order to solve such a problem, and the loosening of the coil does not occur before the annealing, and the strap is cut by the expansion of the coil diameter after the annealing. It is intended to provide a method of binding a coil which does not exist.

[0006]

According to a method of binding a coil of the present invention, when binding a coil with a metal strap, the strap is wound around a portion where the coil is bound, and a strap overlapping a subsequent portion of the strap is formed. Hold the part slightly retracted from the tip, bend the held part of the strap between the looped looped strap part and the coil, and generate the spring force of the bent part. While pressing against the coil while simultaneously maintaining a predetermined gap between the overlapping portion and the coil, the subsequent portion of the strap is tightened, and then the overlapping portion is fastened to cut the subsequent portion.

A coil binding machine according to the present invention binds a coil having a binding head having a gripping portion for gripping and fastening the vicinity of the tip of the strap and the trailing portion and a cutter for cutting the trailing strap. The machine is provided with a strap bender capable of moving the wedge to an operating position in the strap passage of the binding head and an inoperative position where the wedge is retracted between the coil and the binding head. By the bender rotating the wedge in its operating position about its tip,
It is characterized in that the vicinity of the tip of the strap located on the side of the wedge is bent.

[0008]

According to the binding method of the present invention, the coil is bent in a slight gap (for example, about 10 mm) between the portion for gripping the loop-shaped strap that is wound around the coil and the outer peripheral surface of the coil. Since the tip end of the strap is interposed so that its spring force is exerted, tension is generated in the loop portion of the strap by the reaction force acting from the coil through the bent tip end. Therefore, during the transportation of the coil, the strap is prevented from being loosened due to vibration, so that the coil is not scratched and the strap does not fall off. Further, even if the outer diameter of the coil increases due to heating such as annealing, the gap elastically held by the bent tip absorbs the expansion of the coil diameter, so the loop portion of the strap is excessively large. It does not cut because there is no strong tension.

According to the device of the present invention, the strap bender for bending the tip of the strap is
Since the wedge can be located in the strap passage of the binding head for bending the tip portion, and the wedge can be retracted from the strap passage, the tip of the strap is bent and the coil is bound. It is also possible to bind without bending.
Further, by changing the protrusion degree of the stopper protruding from the strap passage in the coil direction, the size of the gap can be changed according to the coil diameter, the coil material, the coil heating temperature, the strap material and dimensions, and the like. .

[0010]

Next, the method of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing an embodiment of the binding machine of the present invention, FIG. 2 is an explanatory view showing an embodiment of the method of the present invention, and FIG. 3 is a binding head of the binding machine of FIG. FIG. 4 is a partially cutaway perspective view, FIG. 4 is an explanatory view showing the operation of the binding head shown in FIG. 3, and FIG. 5 is a perspective view showing an example of a coil binding machine.

As an example of the coil binding machine, FIG. 5 shows a device (hereinafter, simply referred to as a binding machine) 1 for fastening the outer circumference of the strip coil C with a steel strip (strap) S. In this binding machine 1, a chute 3 is attached to the outer periphery of a strip coil C that has been conveyed into the frame 2 and stopped for a short time, with a strap S.
And the tightening device main body 4 tightens the strap, fastens the strap with the binding head 5, and then disconnects the strap S connected from the strap feeder (not shown). Reference numeral 8 is a stopper described later.

As shown in FIG. 1, the binding machine 1 of the present embodiment is provided with a strap bender 6 for bending the tip of a strap S which is wound around a coil C. 7
Is a wedge provided on the strap bender 6. The strap bender 6 can be swung about its supporting shaft 6a so that the wedge 7 is positioned in the strap passage of the binding head 5. Reference numeral 8 is a stopper described later.

When binding the coils using the binding machine 1, as shown in FIG. 2 (a), the strap bender is preliminarily swung around its supporting shaft so that the wedge 7 in the strap bender is bound by the binding head 5 described above. Place it in the strap passageway. Then, the strap S is passed through the strap passage of the binding head 5, and the outer side of the coil C is circulated with a large distance from the coil C, so that the tip end St of the strap S reaches the binding head 5 again. At this time, the tip end St of the strap S passes through the outside of the wedge 7. Then, when the tip end St of the strap passes the wedge 7 to some extent, only the tip end St side is gripped by the binding head 5 (the trailing part is not gripped).

Next, as shown in FIG. 2 (b), the wedge 7 is lowered so as to be interrupted between the tip portion St and the trailing portion of the strap S, and then the wedge 7 is rotated around its tip. The tip end St is bent toward the coil by. At this time, the bent front end St is bent at a certain angle from its base.

Of course, the strap is circulated between the coil and the binding head so that a space is created to allow such work.

Then, as shown in FIG. 2 (c), the wedge is retracted between the grip portion G of the strap S and the coil C by swinging the strap bender about the base end portion thereof. Then, the binding head 5 is moved closer to the coil C while the strap S is tightened by the tightening device body.

Then, as shown in FIG. 2 (d), the tip of the tip portion St abuts on the outer peripheral surface of the coil C, and as the binding head 5 approaches the coil C, the tip portion S approaches.
The opening of t is closed, and the spring force of the tip end St increases.
Then, when the gap between the grip portion G of the strap S and the outer peripheral surface of the coil C reaches a predetermined dimension, the grip portion G is firmly bound and the subsequent portion of the strap S is cut (hereinafter referred to as a seal cut). The final spacing between the grip portion G and the outer peripheral surface of the coil C is such that the stopper 8 (see also FIGS. 1 and 5) attached to the binding head 5 shown in FIG. 3 contacts the outer peripheral surface of the coil C. Determined by That is, the contact surface of the stopper 8 with the coil C projects toward the coil side from the strap passage, and by extension, the grip portion G of the strap S.

As described above, by forming the gap between the grip portion G and the outer peripheral surface of the coil C, the spring force of the bent strap end portion St is applied to the strap S.
Since the appropriate tension is generated, the strap does not fall off due to vibration during coil transfer. Moreover, since the gap absorbs the expansion of the coil diameter due to heating, the strap is not cut off.

The length of the bent tip portion of the strap and the size of the gap may be appropriately changed and set depending on the diameter and material of the coil to be bound, the planned heating temperature, and the material and size of the strap. Good. For example, the cross-sectional dimension of the strap is 0.9mm × 32m
m and the planned annealing temperature of the coil is about 1200 ° C., the length of the tip portion is 1/200 to 1/100 of the coil diameter.
The range is preferably about 10 to 20 m.
About m is preferable. The gap is preferably increased as the coefficient of thermal expansion of the coil material is higher, the temperature at which the coil is scheduled to be annealed is higher, and the cross-sectional dimension of the strap is larger. Although it is not necessary to consider the material of the strap, if a material having a particularly high elastic modulus is used, for example, by increasing the radius R of the bent base of the tip,
In addition, the gap may be increased.

Next, referring to FIG. 3, the binding head 5
Will be explained.

This binding head 5 is a known one and is provided with a pair of claw members 9 for gripping and fastening the strap by swinging and closing each other, and a cutter 10 for cutting the subsequent strap. There is. The cutter 10 is composed of a fixed blade 10a and a movable blade 10b. A pair of stoppers 8 are detachably attached to both outer sides of the claw member 9. The stopper 8 projects in the coil direction by a predetermined dimension from a strap passage 11 formed inside the fixed blade 10a and inside the claw member 9. Thereby, a suitable gap is formed between the binding portion of the strap and the outer peripheral surface of the coil.

Next, the operation of the binding head 5 will be described with reference to FIG. 4 (a) and 4 (b) are a plan view and a side sectional view, respectively, in a state in which a strap is not gripped, and FIG. 4 (c) is a side sectional view in a state in which only a subsequent strap is gripped. FIG. 4 (d) and FIG. 4 (e) are a plan view and a side sectional view in a state in which the strap is fastened and the subsequent strap is cut.

This binding head 5 is a known one, and as shown in FIGS. 4 (a) and 4 (b), the strap passage 11 is formed.
A piece P for fixing the overlapping portions of the straps to each other is set therein (see also FIG. 3). Then, pass the strap S through the strap passage 11 first,
Circulate the coil through the inside of a wedge (not shown). The tip end St of the returned strap is passed through the outer side of the fixed blade 10a, the inner side of the claw member 9 and stopped at a point where it passes the outer side of the wedge to some extent.

Then, as shown in FIG. 4 (c), the pair of claw members 9 are closed to each other up to the middle of the swing stroke, whereby the lower part of the claw member 9 and the grip member 12 (the fixed blade 10a in this embodiment). (Formed in one piece), the portion near the tip end St of the strap is gripped. At this time, the overlapping portions of the subsequent straps are not gripped, and tension is simply applied between the strap feeder and the body of the tightening device.

Next, as shown in FIGS. 4 (d) and 4 (e), the binding head 5 is moved closer to the outer peripheral surface of the coil while the portion of the subsequent strap is tightened, and finally the stopper 8 is moved. The end surface 8a is brought into contact with the outer peripheral surface of the coil. At that time, the claw member 9 is completely closed, and the gripped portion on the tip end side of the strap and the subsequent portion superposed on the gripped portion are combined and fixed by caulking with the piece P. Then, the movable blade 10b is moved to disconnect the subsequent strap between the movable blade 10b and the fixed blade 10a.

In this embodiment, the detachable stoppers 8 are used on both outer sides of the claw member 9 in order to secure a gap between the strap binding portion and the outer peripheral surface of the coil. The present invention is not limited to this, and may be performed, for example, by retracting the claw members 9 from the machine frames on both outer sides thereof stepwise or continuously.

[0028]

According to the present invention, a gap is formed between the fastening portion of the strap and the outer peripheral surface of the coil, and the spring force of the bent tip portion of the strap produces an appropriate tension on the strap. The strap will not fall off due to vibration of the. Moreover, since the gap absorbs the expansion of the coil diameter due to heating, the strap is not cut off.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of a binding machine of the present invention.

FIG. 2 is an explanatory diagram showing an embodiment of the method of the present invention.

FIG. 3 is a partially cutaway perspective view of a binding head in the binding machine of FIG.

FIG. 4 is an explanatory view showing the operation of the binding head of FIG.

FIG. 5 is a perspective view showing an example of a coil binding machine.

[Explanation of symbols]

 1 ... Bundling machine 4 ... Tightening device main body 5 ... Bundling head 6 ... Strap bender 7 ... Wedge 8 ... Stopper 9 ... Claw member C ... Coil S ... strap

Claims (2)

[Claims] 1. When binding a coil with a metal strap, the strap is wound around the binding portion of the coil, and a portion retracted from the tip of the strap overlapping with a subsequent portion of the strap is held.
The held portion of the strap is bent between the looped and looped strap portion and the coil, and the bent portion is pressed against the coil so as to generate its own spring force, and at the same time, the overlapping portion. And a coil, a subsequent portion of the strap is tightened while maintaining a predetermined gap, and then the overlapping portion is fastened to cut the subsequent portion. 2. Grasping the vicinity of the tip of the strap and the following portion,
A binding machine for a coil having a binding head having a gripping portion for fastening and a cutter for cutting a subsequent strap, the operating position in a strap passage of the binding head, the coil and the binding head. It is equipped with a strap bender that can move the wedge to the non-operating position where it has been retracted, and the strap bender rotates the wedge in the operating position around the tip of the wedge so that the side of the wedge can rotate. A coil tying machine configured to bend the vicinity of the tip of the strap located at.