JP4570972B2 - Automatic wire binding machine for steel bars and steel pipes - Google Patents

Description

  The present invention relates to an automatic binding machine for binding steel bars and steel pipes in a continuous line with wires.

  For example, an automatic binding machine as shown in FIG. 9 is known as an automatic binding machine for steel bars, small-diameter pipes, and rod-shaped materials. FIG. 9 is an overall configuration diagram of the automatic binding machine. As shown in this figure, it enters the wire guide 1, raises the unit 3, feeds the wire 4 along the wire guide 1, makes one turn around the bundle, and bends the front end of the wire and hooks it on the torsion head 2. The wire 4 is pulled back, the wire 4 is pulled back, the wire is squeezed into a bundle, the wire is cut at the tip of the cutter and the screw head 2 is rotated, the rear end is bent and hooked on the screw head 2 to remove the wire. To prevent. This is a mechanism that rotates a cutter provided on the outer periphery of the torsion head 2 and cuts the wire while pressing it against the cutter block, and is sharp because it cuts while pressing. The unit 3 is lowered at a low speed while rotating the twisting head 2 to drive the twisting side toward the bundling bundle, and at the same time, both ends bent at the time of clamping are extracted from the head.

  From the configuration as described above, as shown in FIG. That is, FIG. 10 is a view of a twisted eye formed by a conventional twist head. As shown in this figure, since the wire is an angled oblique cut surface, both ends 19 of the wire cutting are standing, and the thread 18 may be long. However, there is a problem in that the other binding material and the threaded portion are in contact with each other, and the steel bar and the steel pipe material are damaged. On the other hand, in recent years, quality standards, in particular, the standards for wrinkles have become stricter, and quality problems have emerged, so countermeasures have become necessary.

  As one of the methods, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-52915 (Patent Document 1), there is an apparatus for packing an exterior material at a predetermined position in the longitudinal direction of a formed long bundle material. The exterior material supply device for appropriately transporting the exterior material to a predetermined position and the upper one of the exterior materials transferred to the predetermined position are received, and one side thereof is positioned above the long bundle material positioned at the predetermined position. Separation / transfer device for the outer packaging material to be transferred, a pressing device for pressing one side of the outer packaging material transferred to the upper side of the long bundle material by the separation / transfer device, and the holding device An outer packaging device for a long bundle material that includes an exterior machine that rotates with respect to the long bundle material with one side pressed against the long bundle material, and wraps the exterior material around the long bundle material to temporarily fix it. Proposed.

JP 7-52915 A

  However, in the method disclosed in Patent Document 1 described above, since the low speed descent is performed by a hydraulic motor, and the stop position is controlled by a timer, the low speed descent stop position varies greatly, and The positional relationship of the torsion head cannot be kept constant, and when binding with a bundling machine, the positional relationship between the material to be bound and the torsion head becomes unstable during operation, so the shape of the torsion cannot be stabilized. There is. Also, regarding the gap between the material to be bound and the torsion head, if the torsion head gets too close to the material to be bound, the wire will be twisted, and the material to be bound will be broken in the subsequent process, and conversely, the torsion head will move away from the material to be bound. There is a problem that the tip of the twisted eyes is not tilted and the product is wrinkled.

  In order to solve the above-described problems, the inventors have made extensive developments. As a result, in order to make the twisted shape constant and stable, it is necessary to keep the positional relationship between the material to be bound and the twisted head constant. For this reason, by mechanically detecting the position of the binding material, even if the position of the binding material changes during the binding operation, the operating position of the torsion head is adjusted each time, so that the binding material and the torsion head are always adjusted. An object of the present invention is to provide an automatic wire binding machine for steel bars and steel pipes that can stabilize the shape of the thread by maintaining the positional relationship constant.

The gist of the invention is that
When binding a bundle of steel bars and steel pipes with wires using a steel bar and steel pipe automatic wire binding machine, this is a mechanism that clamps the tip and rear ends of the wires, and has a binding material detection plate and unit position detection sensor. First, the binding material detection plate is brought into contact with the material to be bound, the position of the binding material detection plate is specified by the unit position detection sensor, the current position of the material to be bound is specified, the unit rising position and the stop position are determined, and the binding operation is performed. Even if the position of the material to be bound changes, the position of the torsion head is adjusted each time so that the positional relationship between the material to be bound and the torsion head is always kept constant. In the automatic wire binding machine.

  As described above, by mechanically detecting the position of the binding machine according to the present invention, the operating position of the torsion head can be adjusted each time even if the position of the binding material changes during the binding operation. The positional relationship between the material and the torsion head can be kept the same, and the shape of the torsion can be bundled in a stable state, preventing wrinkles on the product contact part due to poor binding and improving the quality. It has an excellent effect.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall schematic view of an automatic binding machine according to the present invention. As shown in this figure, as a mechanism from when the bundle bundle is conveyed and enters the wire guide 1, the unit 3 is lifted, and the wire 4 is moved along the wire guide 1 to make one turn around the bundle bundle, FIG. It is the same as the overall schematic diagram of the automatic binding machine shown in FIG. FIG. 2 is an enlarged view of the torsion head shown in FIG. 3 is a cross-sectional view taken along the line AA of the torsion head of FIG. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3 showing the wire clamp mechanism.

When the wire clamp mechanism shown in FIG. 3 is shown in cross-section in FIG. 4, the clamp lever 8 in FIG. 4 is pushed up by the clamp pin 5 via the tip clamp hydraulic cylinder 6 without bending the tip. 4 is pushed up, the wire is pulled back and the wire is squeezed into the bundle, and the clamp lever 8 in FIG. 4 is pushed up via the rear end clamping hydraulic cylinder 7 in FIG. Press the back end of the wire to prevent it from coming off. Thereby turn the Nejiriheddo 2 in FIG. 1, the cutter 9 and the wire is in contact is cut at the outer periphery of Nejiriheddo 2.

  In this case, since the cut surface is provided in a direction of 90 ° with respect to the wire entry angle, the cut surface is a right angle. The twisting operation is a mechanism for forming a twisted eye by moving the twisting head 2 forward (bundling direction) while rotating it by the hydraulic motor 10. Since both ends of the wire are clamped, the torsion head 2 is pulled toward the bundling bundle by the torsion forming force, and therefore the torsion head sliding hydraulic cylinders 11 and 12 are used to cover the operation. As the torsion head 2 rotates, it slides to the bundling side, and when the crank lever roller 13 in FIG. 4 reaches the gradient position 14 in FIG. 2, it is pushed back by the clamp lever spring 15 in FIG. Each clamp is released by being pulled back by the pin spring 16 (the position of 14 is a position where the wire is not twisted and loosened).

Even when the clamp is opened, while rotating the hydraulic motor 10 in FIG. 2 , the screw head 2 is twisted while pushing the screw head 2 with the screw head sliding hydraulic motor 12, and the last 17 positions hold the screw to prevent loose binding. The unit 3 shown in FIG. 1 is lowered and is slid to the retreat limit while rotating the torsion head 2 via the torsion head sliding hydraulic motor 12. At this time, when the fixed position detector (pre-fixed position detection) is turned ON, the front and rear end clamping hydraulic cylinders 7 are operated, and the fixed position of the torsion head 2 is determined by the clamp lever 8.

  FIG. 5 is a diagram showing a unit standby position according to the present invention. As shown in FIG. 5, in order to always maintain the positional relationship between the unit and the material to be bound 20 at a predetermined position, a binding material detection plate 22 is attached to the air cylinder 23 for detecting the binding material, and the unit is raised so that the binding is performed. The material detection plate 22 is pushed down and raised until the unit position detection sensor 26 is turned on, so that the unit stops. Thereby, even when the position of the material 20 to be bound is displaced, the unit rising stop position can be stopped at a predetermined position. In the unit standby position in FIG. 5, the ascending position detector in the unit position detecting sensor 26 is turned off and the descending position detector is also turned off. Reference numeral 21 denotes a binding material conveyance reference position, 24 denotes a torsion head standby position, 25 denotes a binding material detection striker, and 27 denotes a wheel.

  FIG. 6 is a diagram showing a unit rising position according to the present invention, and FIG. 7 is a diagram showing a unit low speed descending position according to the present invention. As shown in FIG. 6, when the unit is raised, the rising position detector in the unit position detection sensor 26 stops rising at the timing from OFF to ON, and the lowering position detector is turned ON. At that time, the gap 28 between the torsion head position at the time of ascent and the material to be bound is kept constant. In addition, as shown in FIG. 7, the position where the unit descends at a low speed and stops, the binding material detection plate 22 comes out even when the unit descends at a low speed, as shown in FIG. The device is OFF, and the descending position detector is stopped at a low speed at the timing from ON to OFF, so that the gap 28 between the material to be bound and the torsion head at the final stage of the binding operation can be kept constant.

  In this way, the binding material detection plate 22 is attached to the tip of the binding material detection air cylinder 23 attached to the unit, and the binding material detection plate 22 is brought into contact with the material to be bound 20 when the unit is raised. By monitoring the position by the unit position detection sensor 26, the current position of the binding material 20 is specified, and the rising position of the unit is determined. Further, the position at which the unit starts to descend at a low speed and stops is determined from the position of the binding material detection plate 22 and stopped, so that the gap 28 between the binding material and the torsion head can always be kept constant.

  By keeping the gap 28 between the binding material and the torsion head constant at all times, the initial position of the binding material and the torsion head depends on the shape of the binding material as in the conventional case where the positioning of the torsion head is performed only by the rising end of the unit. Even if the position of the binding material is changed by inserting / removing the binding material detection plate 22 according to the present invention when the positional relationship is varied, the position of the knot at the base of the ring 27 is a fixed position (gap 28) with respect to the material. Therefore, there is no variation in the initial positional relationship between the material to be bound and the torsion head depending on the shape of the binding material, and the binding twists can be made stably.

  FIG. 8 is a torsional view formed according to the present invention. A twisted shape as shown in this figure is formed. That is, the twisted end 18 is short, and the winding end 19 is formed on the twisted body at both ends of the wire cutting. As a result, it is possible to obtain automatic wire binding of steel bars and steel pipes that do not generate wrinkles at the twisted portion when loaded and framed.

1 is an overall schematic view of an automatic binding machine according to the present invention. It is the figure which expanded the torsion head shown in FIG. It is AA sectional drawing of the torsion head of FIG. It is BB sectional drawing of FIG. 3 which shows a wire clamp mechanism. It is a figure which shows the unit standby position which concerns on this invention. It is a figure which shows the unit raising position which concerns on this invention. It is a figure which shows the unit low speed descent | fall position which concerns on this invention. It is a figure of a twisted eye formed by the present invention. It is a whole block diagram as an automatic binding machine. It is a twist eye figure formed with the twist head of the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire guide 2 Screw head 3 Unit 4 Wire 5 Clamp pin 6 Hydraulic cylinder for front end clamp 7 Hydraulic cylinder for rear end clamp 8 Clamp lever 9 Cutter 10 Hydraulic motor 11 Hydraulic cylinder for screw head slide 12 Hydraulic cylinder for screw head slide 13 Crank lever Roller 14 Gradient position 15 Clamp lever spring 16 Clamp pin spring 17 Twisted thread completion position 18 Twist 19 Wire cutting both ends 20 Bundling material 21 Bundling material conveyance reference position 22 Bundling material detection plate 23 Binder detection air cylinder 24 Torsion Head Standby Position 25 Binder Detection Striker 26 Unit Position Detection Sensor 27 Wheel 28 Gap


Patent applicant Sanyo Special Steel Co., Ltd. and 1 other
Attorney Atsushi Shiina

Claims (1)

When binding a bundle of steel bars and steel pipes with wires using a steel bar and steel pipe automatic wire binding machine, this is a mechanism that clamps the tip and rear ends of the wires, and has a binding material detection plate and unit position detection sensor. First, the binding material detection plate is brought into contact with the material to be bound, the position of the binding material detection plate is specified by the unit position detection sensor, the current position of the material to be bound is specified, the unit rising position and the stop position are determined, and the binding operation is performed. Even if the position of the material to be bound changes, the position of the torsion head is adjusted each time so that the positional relationship between the material to be bound and the torsion head is always kept constant. Automatic wire binding machine.

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