JP2552384Y2 - Device for guiding binding wires in a binding machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for guiding a binding wire in a binding machine for guiding a binding wire around a material to be bound such as a wire.

[0002]

2. Description of the Related Art An arc-shaped curved guide portion is formed in front of a wire supply mechanism for feeding a long wire, and a wire fed from the tip of the curved guide portion is wound around the material to be bound a plurality of times. A binding machine disclosed in Japanese Patent Publication No. 59-39027 is known as a binding machine that binds a material to be bound by gripping and twisting a part of a wire wound in an annular shape. In this binding machine, since it is necessary to cut the wire prior to twisting after winding the wire around the material to be bound, in the above-described prior art mechanism, a cutting mechanism is provided at the tip of the curved guide. In order to operate the cutting mechanism, a wire rope is arranged along the curved portion of the guide in order to operate the cutting mechanism, one end is connected to the cutting mechanism and the other end is connected to the operating mechanism inside the binding machine. Make up.

However, in the method of cutting by pulling the wire rope, the wire rope cannot be cut because the wire rope is stretched at the time of pulling, and the operation reliability of the cutter is reduced. In addition, an adjusting mechanism for coping with the elongation of the wire rope is required, and frequent adjustment is required.

[0004] Further, since the wire rope is arranged along the curved guide, the resistance of the cutter operation increases,
Further, the wire rope is cut due to friction between the wire rope and the guide, which causes a failure.

Further, if the wire cutting mechanism is installed in a linear portion before the curved portion of the guide, the cutter mechanism can be actuated by the rod and the above problem can be solved. Is left in the curved portion of the torsion, the binding portion after the twisting is caught when the binding portion is pulled away from the guide, and the workability is impaired.

[0006]

The object of the present invention is to solve the above-mentioned problems, and to install a wire cutting mechanism on a linear portion of a wire guide so that the wire cutting mechanism can be operated by a rod.
An object of the present invention is to provide a guide device for a binding wire in a binding machine that can easily separate a cut wire end from a curved guide portion after binding.

[0007]

In order to achieve the above object, a binding wire guide device in a binding machine according to the present invention is provided with a linear guide portion in front of a wire supply mechanism for feeding a long wire. Forming a guide portion whose front end is curved in an arc shape in front of the linear guide portion, winding a wire fed from the front end of the curved guide portion a plurality of times around the material to be bound, and winding the wire in an annular shape. In a binding machine that binds a material to be bound by grasping and twisting a part of the bent wire, a cutting mechanism of a binding wire is disposed between the linear guide portion and the curved guide portion, and Shape guide part,
A side plate portion having a front portion curved in an arc shape, and a movable member disposed opposite to one side surface of the side plate portion and having a curved concave groove formed in the facing surface; Is movable in the direction of contact and separation with respect to the side plate portion, and is always urged by a spring in the contact direction. An inclined surface that can be engaged is formed.

[0008]

According to the above construction, the wire supplied to the curved guide portion via the linear guide portion by the wire supply mechanism passes through the concave groove, but is guided so as to be curved when passing. After being discharged from the guide portion in a curved state and formed into an annular shape as it is, the distal end of the wire is guided by the guide piece, enters the guide concave portion, and goes around here. Therefore, when a material to be tied such as a wire is arranged inside the guide portion, the wire is wound around the material to be tied and formed in an annular shape. Thereafter, when the binding machine is forcibly separated from the material to be bound, the wire in the concave groove engages with the inclined surface at the tip of the movable member, and separates the movable member from the side plate portion so as to pry open the movable member against the spring. Then, the concave groove is opened and the internal wire is discharged.

[0009]

1 and 2 show a binding machine. A binding wire 3 wound around a bobbin 2 is provided on a housing 1 of the binding machine with a straight guide portion 4 on the front side and a curved shape. A wire feeding mechanism a for continuously feeding the guide portion 5, a cutting mechanism b for cutting the wire 3 which is fed from the tip of the curved guide portion 5 and wound around the material 6 to be bound a plurality of times, and an annular winding mechanism b A wire twisting mechanism c that binds the material 6 to be bound by gripping and twisting a part of the turned wire 3 is provided.

The wire feed mechanism a operates a wire feed motor 7 by turning on a start switch p by a lever L, and a gear-shaped wire feed roller connected to the wire feed motor 7 via a reduction gear 8. The wire 3 is continuously supplied to the curved guide portion 5 at the front end of the housing 1 by the rotation of the motor 9. The wire feed motor 7 is arranged at the rear of the housing 1, and the movable roller 10 is opposed to the feed roller 9. The movable roller 10 is urged by a spring 11 so as to pinch the wire 3, and the feed roller 9
Is engaged. A linear guide portion 4 for linearly feeding the wire 3 fed from the feed roller 9 is formed in the upper part of the housing 1 in front of the wire feeding mechanism a, and a curved guide portion is further provided in front of the linear guide portion 4. A part 5 is formed.

As shown in FIG. 3 to FIG. 7, the curved guide portion 5 has a front portion curved in an arc shape, a storage recess 17a on one side, and a guide recess 17b on the other side. Side plate portion 12 formed by
The movable member 14 is disposed opposite to one side surface of the side plate portion 12 to form a curved concave groove 13 on the opposite side surface. It is movable by a spring 15 so as to be able to move in the contact and separation directions, and to be always in a contact state. In addition, an inclined surface 16 that can be engaged with the wire 3 in the concave groove 13 is formed at a distal end portion of the movable member 14 so as to separate the movable member 14 from the side plate portion 12. Further, guide pieces 18 are formed on both sides of the proximal end of the guide recess 17b so as to expand downward.

A feed sensor 19 for detecting a predetermined number of rotations of the wire feed roller 9 is provided between the output shaft of the wire feed motor 7 and the housing 1. The feed sensor 19 comprises a magnet 19a fixed to the peripheral surface of the reduction gear 8 of the feed motor, and a Hall element 19b arranged on the housing 1 side.

According to the wire feeding mechanism a having the above structure, the wire 3 continuously supplied to the curved guide portion 5 passes through the concave groove 13 but is guided so as to be curved when passing therethrough. It is discharged in a curved state from the part 5 and is formed into an annular shape as it is. Further, after that, the tip of the wire 3 is guided by the guide piece 18 and enters the guide concave portion 17b, where it goes around. Therefore, when the material to be tied 6 such as a wire is disposed inside the guide portion 5, the wire 3
It is wound around. When the number of revolutions of the reduction gear 8 is detected by the feed sensor 19, a detection signal is output, and the control device (not shown) stops the feed motor of the wire supply mechanism a and drives the torsion mechanism. It is configured as follows.

The cutting mechanism b connects one end of the shearing cutter 20 disposed between the linear guide section 4 and the curved guide section 5 around a wire guide 12a disposed in front of the linear guide section 4. The other end of the cutter 20 is connected to one end of a rod 22 disposed along the linear guide 4 together with the connecting plate 21, and the other end of the rod 22 is connected to the side plate 12. An operating piece 24 is formed at the end of the link plate 23 by being connected to a pivotally supported link plate 23.
Is pressed by appropriate means, and as shown in FIG.
The cutter 20 is rotated by moving the rod 22 backward in the axial direction, and the wire through hole 2 is
By cutting off the communication between the wire guide 4a and the wire passage 4a of the wire guide 12a, the wire 3 is cut before the curved guide portion 5. The shearing cutter 20 is normally spring-biased in a direction for guiding the wire 3 together with the wire guide 12a, as shown in FIG.

Note that a part of the wire 3 wound in an annular shape is tightened by a wire twisting mechanism c (not shown). The wire twisting mechanism c moves the tubular body 26 driven by the torsion drive motor 25 forward to a predetermined gripping position, and then grips a part of the wire 3 with the hook 27 pivotally supported by the tubular body 26. After that, when the tubular body 26 moves forward, a part 26a of the tubular body 26 is moved to the link plate 2 of the cutting mechanism b.
The third operating piece 24 is configured to engage and press it (see FIG. 1). However, the pressing drive of the link plate 23 is not limited to the specific wire twisting mechanism c, but may be the one disclosed in Japanese Patent Publication No. 59-39027. Further, the pressing drive of the link plate 23 is not limited to this example. For example, it may be configured to be driven by means linked to a feed motor.

In the guide device having the above structure, the wire 3 supplied to the curved guide portion 5 by the wire supply mechanism a passes through the inside of the concave groove 13, but is guided so as to be curved when passing. After being discharged from the portion in a curved state and formed into an annular shape as it is, the distal end of the wire 3 is guided by the guide piece 18 and enters the guide concave portion 17b, and goes around here. Therefore, when the material to be tied 6 such as a wire is arranged inside the curved guide portion 5, the wire 3 is wound around the material to be tied 6 and formed in an annular shape. Wire 3
Can be measured by the number of rotations of the wire feed roller 9, so that the number of rotations of the feed roller or the reduction gear 8 is detected by the feed sensor 19, and is rewound from the bobbin 2 and wound around the material 6 to be bound. When the wire 3 reaches a predetermined feed amount (the number of rotations reaches a predetermined number), a detection signal is output, and the control device (not shown) stops the feed motor of the wire supply mechanism a and drives the torsion mechanism. In conjunction with this, the wire cutting mechanism b operates as shown in FIG. 3, and the wire 3 is cut. Thereafter, when the housing 1 is forcibly separated from the material 6 to be bound, the wire 3 in the groove 13 engages with the inclined surface 16 at the tip of the movable member 14 and
Is separated from the side plate portion 12 so as to pry open against the spring 15 (see FIG. 8), so that the concave groove 13 is opened and the internal wire 3 is discharged.

[0017]

According to the present invention, since the wire cutting mechanism can be installed on the linear guide and the operation of the wire cutting mechanism can be performed by the rod, there is no elongation at the time of pulling, and the wire is reliably cut. can do.

Further, the wire in the groove is engaged with the inclined surface at the tip of the movable member to separate the movable member from the side plate so as to pry open the member against the bias of the spring, thereby opening the groove. Since the internal wire can be discharged, workability is not impaired.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a binding machine according to the present invention.

FIG. 2 is a cross-sectional view of the binding machine of FIG.

FIG. 3 is an enlarged front view of a curved guide portion of the binding machine.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken on line BB of FIG. 3;

FIG. 6 is a cross-sectional view taken along line CC of FIG. 3;

FIG. 7 is an enlarged plan view of the curved guide portion.

FIG. 8 is an explanatory view of a discharge mode of the wire in FIG. 5;

[Explanation of symbols]

 a wire supply mechanism b wire twisting mechanism 3 wire 4 linear guide section 5 curved guide section 6 material to be tied 12 side plate section 14 movable member 16 inclined surface

Claims (1)

(57) [Scope of request for utility model registration] A linear guide portion is provided in front of a wire supply mechanism for feeding a long wire, and a guide portion having a tip curved in an arc shape is formed in front of the linear guide portion, and the curved guide portion is formed. The binding machine that binds the material to be bound by winding the wire fed from the tip of the part around the material to be bound a plurality of times, grasping a part of the wire wound in an annular shape, and twisting the wire. A cutting mechanism for a binding wire is disposed between the curved guide portion and the curved guide portion, and the curved guide portion is formed into a side plate portion having a front portion curved in an arc shape, and one side surface of the side plate portion. And a movable member having a curved concave groove formed in the opposed surface, the movable member being movable toward and away from the side plate portion, and having a spring always in the contact direction. The movable member is biased and the movable member A binding wire guide device for a binding machine, wherein an inclined surface that can be engaged with the wire in the concave groove is formed so as to be separated from the binding groove.