JPH07137705A - Wire-feeding device - Google Patents

Abstract

PURPOSE:To prevent a wire from sagging due to its being drawn back by winding in a coil the wire in a state of being gripped between a feed wheel and a pinch roll in a manner of drawing back with twisting a portion of the wire once payed out and winding it back in a coil. CONSTITUTION:There are provided a feed wheel 1 and a pinch roll 2 for jointly passing by pinching between the two a binding wire W wound in a coil and housed in a wire magazine M with the axis L of the coil held vertical. The axis L2 of the pinch roll 2 is inclined relative to the axis L1 of the feed wheel 1 so that, when the feed roll 1 is tuned in reverse, a portion of the wire W that has once been payed out from a wire-feeding device A is drawn back toward the wire magazine M with twisting in the direction permitting the rewinding and rewound in a coil in the wire magazine M. As a result, the wire is prevented from sagging between the feeding of wire and the binding and a failure in feeding of wire to the binding device can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire feeding device for feeding a wire wound in a coil shape and feeding it to a binding device.

[0002]

2. Description of the Related Art Conventionally, various long strip steel materials such as angle materials, H-section steels, and reinforced steel bars are shipped in a state in which a predetermined number of them are automatically bound by wires. As shown in FIG. 4, in the above-mentioned binding apparatus 100 for bar steel, a wire W for binding is circulated along a wire guide ring 101 to form a loop WL, and the loop WL is squeezed to form the wire guide ring. In the state in which it is wound around the steel strip material introduced into 101, the root of the loop WL is twisted and cut to bind the steel strip material.

The binding wire W is supplied to the binding device by feeding a wire wound in a coil shape by a predetermined length. The wire W wound in the coil shape is housed in the wire magazine 103 with the central axis 102 thereof oriented in the vertical direction.
Rotatable guide wheel 10 directly above 02
4 and the ring-shaped guide member 105 provided in the binding device 100, and the wire guide ring 1 by the wire feeding means 106 equipped in the binding device 100.
Sent to 01.

[0004]

In the binding of the above-mentioned steel strips, when the loop WL formed along the wire guide ring 101 is drawn, the wire feeding means 106 of the binding device is reversed so that the excess wire is removed. Since W needs to be pulled back to the guide wheel 104 side, the pulled back wire W causes the guide wheel 104 and the guide member 105 of the binding device 100 to be pulled back, as shown by the chain double-dashed line in FIG.
Will hang between and. For this reason, the hung wire W may be entangled or entangled with each other, and it may be impossible to resend the wire W to the binding device 100. Further, in order to prevent the hanging wire W from hitting an operator and causing an accident such as an injury, a part of a housing frame for housing the pulled back wire W is provided, but There is a problem that a very large housing frame is required, the equipment cost is high, and the frequency of wire entanglement and entanglement inside the housing frame increases.

In order to solve such a problem, a pinch roller for pulling the wire W back into the wire magazine 103 may be formed directly above the wire magazine 103. The wound wire and the twisted wire of the wire W are straightened to some extent, and in particular, the binding device 100
The wire feeding means 106 is configured to correct the winding curl by feeding the wire W by a plurality of pinch rollers. Therefore, if the wire W once fed out is simply pulled back into the wire magazine 103, It is difficult to rewind it into the coil shape before feeding it, and it has not been put to practical use.

Further, when the wire W in the wire magazine 103 is consumed or when the wire W supplied to the binding device 100 is replaced, the tip of the new wire W is fed to the wire feeding means of the binding device 100. 1
It is necessary to wind the wire W around the wire 06, but at this time, it is necessary to manually pull the wire W and to pay out the wire W from the wire magazine 103 for a predetermined length while correcting the curl. There was a problem of needing.

The present invention has been made in view of the above problems, and it is possible to prevent the binding wires from hanging down, and to easily supply or replace the wires. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, a wire feeding device of the present invention is designed such that a coiling wire for binding is placed with its central axis oriented in the vertical direction. A wire feeding device that sequentially feeds and feeds to a bundling device, a feed wheel arranged directly above the wound wire, a pinch roll that sandwiches the wire between the feed wheel, and the feed. Drive means for rotating the wheel in both forward and reverse directions, and at the time of driving the feed wheel in reverse, the axis of the feed wheel and the pinch roll axis are twisted so as to twist the wire once unwound. It is characterized in that the core is relatively inclined.

Further, the wire feeding device may be provided with a pinch roll separating means for separating and separating the pinch roll from the feed wheel for a predetermined period when the rotational driving of the feed wheel is stopped.

[0010]

According to the wire feeding device having the above structure, the feed wheel is normally rotated by the driving means while the wire is sandwiched between the feed wheel and the pinch roll, so that the wire is wound into a coil. The wire can be easily paid out.

Further, by driving the feed wheel in the reverse direction by the driving means, the wire once fed can be pulled back while being twisted, and rewound into a coil again. Therefore, by interlocking this wire pullback operation with the wire pullback operation by the binding device, it is possible to prevent the wire from hanging.

Particularly, when a pinch roll separating means for separating and separating the pinch roll from the feed foil for a predetermined time when the rotation of the feed foil is stopped, the wire sandwiched by the feed foil and the pinch roll is set to the feed foil. Since it can be released once each time the rotation of the wire is stopped, the wire per winding in the wound state is generated based on the difference in the winding diameter between the outer circumference side and the inner circumference side of the wire wound in a coil shape. The difference between the twist amount of the feed wheel and the twist amount of the feed wheel and the pinch roll is eliminated every time the feed wheel is stopped in rotation, so that the difference in the twist amount is prevented from accumulating. You can

[0013]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. With reference to FIG. 1, a wire feeding device A of the present invention is a coil-shaped winding device, in which a wire W for binding is stored in a wire magazine M in a posture in which a central axis L thereof is oriented in a vertical direction, It feeds a long strip steel material to a binding device (not shown) that binds the long strip steel material, and a central axis L of the wire W wound in the coil shape by a support P.
It is supported directly above.

The wire feeding device A is provided with a feed wheel 1 for pinching and traveling the wire W and a pinch roll 2. The feed wheel 1 is horizontal as shown in FIGS. 2 and 3. It is supported on the side surface of the frame body 3 via a support shaft 11 and a bearing 12 extending in the direction.
This feed wheel 1 can be rotationally driven by a driving means 4 formed inside the frame body 3, and its outer periphery is
A V-groove 1a for introducing the wire W is formed.

The driving means 4 transmits the driving force of the air motor 41 to the support shaft 11 of the feed wheel 1 via the gear mechanism 42, and switches the supply route of compressed air to the air motor 41. By
The feed wheel 1 can be rotationally driven in both forward and reverse directions. The air motor 41 drives the feed wheel 1 in the normal direction in synchronization with the pulling operation of the wire W when the loop of the binding device is formed, and synchronizes with the pulling back operation of the wire W when the loop is drawn. The wheel 1 is drive-controlled so as to be driven in reverse. Further, the drive means 4 rotationally drives the feed wheel 1 so that the wire W can be run at a speed substantially equal to the speed at which the wire W is pulled in and pulled back by the binding device.

The pinch roll 2 is the feed wheel 1 described above.
The outer periphery of the V groove 1a is sharp so that it can be introduced into the V groove 1a, and a curved concave groove 2a is formed over the entire periphery at the tip of the outer periphery. The pinch roll 2 is rotatably supported by the support shaft 21 via a bearing 22, and is separated from the feed wheel 1 by a pinch roll separating means 5 for a predetermined period of time or moved close to the feed wheel 1. You can do it.

The pinch roll separating means 5 is provided with a support shaft 51 projecting parallel to the support shaft 11 of the feed wheel 1 on the side surface of the frame body 3, and swings on the support shaft 51 via a bush 52c. A pair of L-shaped plates 52a and 5 that are fitted to each other
2b (see FIG. 1b), and an air cylinder 53 and the like for swinging the swing arm 52. The support shaft 21 of the pinch roll 2 is
Both ends are supported by a swing arm 52. The air cylinder 53 is drive-controlled so as to separate the pinch roll 2 from the feed wheel 1 every time the feed wheel 1 stops rotating.

When the driving means 4 drives the pinch roll 2 in the reverse direction, the axis L2 of the pinch roll 2 is
Wire W once fed from wire magazine M
While being twisted in a direction in which it can be rewound, it is inclined by a predetermined angle with respect to the axis L1 of the feed wheel 1 along a vertical plane including the axis L2 so as to be pulled back to the wire magazine M side. . The inclination direction of the axis L2 of the pinch roll 2 is the wire W in the wire magazine M.
Is determined by the winding direction of, for example, FIG.
When the winding direction of the wire W is counterclockwise in plan view, as shown in FIG. 2, the axis L2 is set so as to rise to the right in FIG. 1B. That is, with respect to the support shaft 21 of the pinch roll 2, one end of the swing arm 52 on the side of the L-shaped plate 52a is connected to the other L-shaped plate 52b.
Each L-shaped plate 52 so as to be higher than the end on the side.
It is fixed to a and 52b. Also, the axis L of the pinch roll 2
The inclination angle θ of 2 is determined according to the average winding diameter D of the wire W in the wire magazine M.
Is set so that the wire W is twisted by 360 ° when the wire is run for a length (πD) corresponding to one winding. In addition, tubular guide members 61 and 62 for guiding the wire W are disposed between the feed wheel 1 and the pinch roll 2 so as to face each other on the frame body 3 (see FIG. 2). Further, above the frame body 3, the feed foil 1
And the wire W fed by the pinch roll 2
A guide wheel 7 for guiding to the binding device side is rotatably provided.

According to the wire feeding device A having the above-described structure, the feed wheel 1 is driven in the reverse direction by inclining the axis L2 of the pinch roll 2 with respect to the axis L1 of the feed wheel 1 by a predetermined angle θ. At the time, that is, during the pullback operation of the wire W of the binding device, the wire W once fed from the wire feeding device A to the binding device side is pulled back to the wire magazine M side while being twisted in a rewindable direction. So the wire W is pulled back
Can be rewound into a coil again in the wire magazine M. Therefore, it is possible to prevent the wire W from hanging down between the wire feeding device A and the binding device. Therefore, it is possible to prevent the hung wire W from being entangled or entangled and being unable to be fed to the binding device. In addition, a housing frame for housing the excess wire W, which is conventionally provided for preventing accidents, becomes unnecessary. Moreover, there is no possibility that the wire W will be entangled or entangled in the wire magazine M.

Further, when replenishing or exchanging the wire W, the tip of the new wire W is introduced between the feed wheel 1 and the pinch roll 2 and the feed wheel 1 is normally driven by the driving means 4. Thus, the wire W can be fed to the binding device side by a desired length. For this reason,
There is no need for manually pulling the wire W to the binding device and feeding it out, and the labor for replenishing or replacing the wire W can be reduced.

By the way, the axis L2 of the pinch roll 2
The inclination angle θ is set with reference to the average winding diameter D of the coiled wire W in the wire magazine M, but the winding diameters of the coiled wire W on the outer peripheral side and the inner peripheral side are different. Therefore, the wire length per winding also differs between the outer peripheral side and the inner peripheral side. Therefore, in reality, the twist amount of the wire W by the wire feeding device A and the twist amount of the coiled wire W per winding do not match. That is, for the wire W on the inner peripheral side, the amount of twist by the wire feeding device A is insufficient with respect to the amount of twist per winding in the wire magazine M, and The amount of twist by the wire feeding device A becomes excessive with respect to the amount of twist per one turn in the wire magazine M.
When the wire W is continuously run by the feed wheel 1 and the pinch roll 2 in a state in which the twist amount is excessive or deficient in this way, the difference in the twist amount is accumulated and the pulled wire is pulled back. W cannot be smoothly rewound in the wire magazine M. However, in the above-described embodiment, the pinch roll separating means 5 separates the pinch roll 2 from the feed wheel 1 every time the feed wheel 1 stops rotating, so that the pinching state of the wire W between them is temporarily released. Therefore, it is possible to prevent the error in the twist amount from accumulating. Therefore, the wire W can always be stably rewound into the wire magazine M.

In the above embodiment, the axial center L2 of the pinch roll 2 is inclined with respect to the axial center L1 of the feed wheel 1, but, conversely, the feed wheel 1
May be inclined with respect to the axis L2 of the pinch roll 2, or both the axis L1 and L2 of the feed wheel 1 and the pinch roll 2 may be inclined.

The wire feeding device of the present invention is not limited to the above-mentioned embodiment. For example, instead of the air motor 41, an electric motor is used, the pinch roll separating means 5 and the pinch roll 2 are used. It is possible to make various design changes, such as a structure in which is horizontally slid.

[0024]

As described above, according to the wire feeding device of the present invention, the wire wound in the coil shape is once fed out and then pulled back while being twisted so that it can be unwound. Since the wire is rewound into a coil again, it is possible to prevent the wire from hanging down between the wire feeding device and the binding device.

Therefore, it is possible to solve the conventional inconvenience that the hung wire is entangled or entangled and the wire cannot be fed to the binding device. Further, since the wire housing frame for preventing the occurrence of an accident due to the hanging of the wire is unnecessary, the equipment cost can be reduced. Further, when replenishing or exchanging the wire, it is not necessary to manually feed a new wire to the binding device, and the labor for exchanging the wire can be reduced.

In particular, when the pinch roll separating means for separating and separating the pinch roll from the feed foil for a predetermined time when the rotational driving of the feed foil is stopped, the state where the wire is held between the feed foil and the pinch roll is determined by the feed foil. Since it can be released once each time the rotation of the wire is stopped, the wire per winding in the wound state is generated based on the difference in the winding diameter between the outer circumference side and the inner circumference side of the wire wound in a coil shape. The difference between the twist amount of the feed wheel and the twist amount of the feed wheel and the pinch roll is eliminated every time the feed wheel is stopped in rotation, so that the difference in the twist amount is prevented from accumulating. You can For this reason,
It has a unique effect that the wire can always be stably rewound.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a wire feeding device of the present invention, in which a is a front view and b is a side view of a main part.

FIG. 2 is a partially cutaway front view.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a front view showing a conventional example.

[Explanation of reference numerals] 1 feed wheel 2 pinch roll 4 driving means 5 pinch roll separating means L1 feed wheel shaft core L2 pinch roll shaft core W wire A wire feeder

Claims (2)

[Claims] 1. A wire feeding device for feeding a binding wire wound in a coil shape in sequence with its central axis oriented in the vertical direction and feeding the wire to a binding device. A feed wheel arranged directly above the fixed wire, a pinch roll sandwiching the wire between the feed wheel, and a drive means for rotating and driving the feed wheel in both forward and reverse directions. A wire feeding device characterized in that an axis of a feed wheel and an axis of a pinch roll are relatively inclined so as to twist a wire once unwound so as to be able to be unwound during reverse rotation driving. 2. When the rotational drive of the feed wheel is stopped,
The wire feeding device according to claim 1, further comprising pinch roll separating means for separating and separating the pinch roll from a feed wheel for a predetermined period.