JPH07178489A - Device for automatically supplying spiral bar in reinforcing bar cage knitting machine - Google Patents

Abstract

PURPOSE:To automatically supply a spiral bar in knitting a reinforcing bar cage. CONSTITUTION:In a knitting machine of a reinforcing bar cage for concrete pile, a spiral bar 5 un-wound from an unwinding drum 9 of the spiral bar is supplied into a guiding arm 8 revolving together with a revolving welding part 7 through a action tube 13 installed freely swinging by. The action tube 13 which swings following to pulling or loosing grade of the spiral bar is detected with sensor members 20a, 20b, 21a, 21b, due to the signal from the sensor in answer to the movement of the action tube 13, the number of revolution of the un-winding drum 9 is increased or decreased, the spiral bar 5 is properly supplied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically supplying a spiral bar in a knitting machine for a reinforced basket embedded in a concrete pile.

[0002]

2. Description of the Related Art Reinforcing bar baskets are embedded in a concrete pile, and as shown in FIGS. 1 and 2, this reinforcing bar basket 3 has a large number of vertical bars 4, 4 of a required diameter. It has a structure in which the spiral muscles 5 are wound around and fixedly arranged on the circumference at intervals.

The reinforcing bar cage 3 is generally manufactured by a reinforcing bar cage knitting machine. As shown in FIG. 1 and FIG. 2, this machine conventionally has a knitting machine main body 1 in which spiral helix 5 is wound around and fixed by welding while moving the arranged warp muscles 4 and 4. And a drum mounting body 2 for supplying a spiral muscle 5. The knitting machine body 1 has vertical lines 4, 4
The drum mounting frame 2 is provided with a welding portion 7 having an electrode for welding the spiral muscle 5 while rotating around the circumference of the drum, and a guide arm 8 for guiding the spiral muscle 5 while rotating similarly to the welding portion 7. The spiral muscle 5 from the unwinding drum 9 attached to
The guide arm 8 is guided and supplied to the welded portion 7 via the tip portion thereof.

[0004]

In the above machine, since the amount of the spiral muscles 5 consumed in the welded portion 7 is constant under a certain condition, the unwinding drum 9 that sends out the spiral muscles 5 is
As the spiral muscle 5 is consumed, the unwinding diameter of the spiral muscle decreases every moment. Therefore, conventionally,
The operator must adjust the number of rotations of the unwinding drum as the unwinding diameter decreases, and the operator is forced to perform manual work that requires skill.

The present invention has been made in order to solve the above-mentioned conventional problems, and an operating cylinder is provided at the tip end portion of the guide arm to change the posture of the operating cylinder depending on how the helical muscle is pulled or loosened. By detecting with a sensor, it is possible to automatically control the number of rotations of a spiral-shaped unwinding drum, thereby enabling unmanned automatic driving during knitting of a reinforcing bar basket.

[0006]

The structure of the present invention for achieving the above-mentioned object will be described with reference to the drawings corresponding to the embodiments. In the rebar cage knitting machine in which the muscles 4 and 4 are moved, and the spiral muscles 5 are supplied and fixed to the welded portion 7 which rotates around them, the spiral muscles 5 unwound from the unwinding drum 9 are welded. A sensor that is provided on a guide arm 8 that rotates together with the portion 7 and that supplies to the welding portion 7 through an operating cylinder 13 that swings according to the tension and looseness of the helical muscle 5 and that detects the swing of the operating cylinder 13. 20a, 20
b, 21a, 21b are provided, and the number of rotations of the unwinding drum 9 can be increased or decreased according to the signal thereof.

[0007]

In the device of the present invention, the working cylinder 13 is swung by the increase / decrease in the amount of unwinding of the spiral muscle 5 from the unwinding drum 9, and the sensor members 21a, 21b on the inside or the sensor member 20a on the outside, Block the light between 20b. That is, when the amount of unwinding of the spiral muscle 5 from the unwinding drum 9 is normal, as shown in FIG.
The sensor member 20a on the outside while maintaining the state along
It passes between 20b and the inner sensor members 21a, 21b. When the amount of unwinding of the spiral muscle 5 is insufficient, the helical muscle is pulled, and as shown in FIG. 4, the actuating cylinder 13 swings inward to block light between the sensor members 21a and 21b located inside.
On the contrary, when the amount of unwinding of the spiral muscle 5 increases, it becomes loose and the actuating cylinder 13 swings outward to block the light between the sensor members 20a and 20b on the outside, as shown in FIG. Will be done. And the sensor member 21a on the inside,
When the light between 21b is cut off, the rotation speed of the drum 9 is raised by the signal, and when the light between the outside sensor members 20a, 20b is cut off, the rotation speed of the unwinding drum 9 is lowered by the signal. It is automatically controlled.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 is a knitting machine main body, which is a main part, and 2 is a drum mounting frame which is also installed facing the knitting machine main body 1.

The knitting machine body 1 includes a frame 10 and a reinforcing bar basket 3
There is provided a through passage 11 having a size through which the reed bar 12 is detachably mounted, in which the vertical bars 4 and 4 of the reinforcing bar basket 3 can be arranged and pass. A rotary ring 6 driven by a motor is provided along the outer periphery of the through passage 11 at the front end, which is the side facing the drum attachment frame, and the spiral ring 5 is formed on the rotary ring 6. A welding portion 7 that is pressed against the streak 4 to be welded, and a guide arm 8 that projects long toward the drum mounting body 2 are provided at positions separated from each other in the diametrical direction of the welding portion 7 and the rotary ring 6, and at the tip portion thereof. Is provided with an operating cylinder 13 that guides the spiral muscle 5 toward the weld 7.

The actuating cylinder 13 is formed long in the direction of rotation of the guide arm 8 and is a guide hole for passing the spiral muscle 5 along the axis.
14 has one end of the actuating cylinder 13 is pivotally attached 16 to a bracket 15 projecting from the tip of the guide arm 8 and is swingably attached in the transverse direction of the rotation track a of the guide arm 8.
It is normally urged to follow the direction of rotation. The drum mounting body 2 is provided with a frame 17 on which a rotary cylinder 18 having a size through which the reinforcing bar basket 3 can pass is driven by a motor. The spiral muscle 5 is wound around the rotary cylinder 18. The unwinding drum 9 is detachably attached. The spiral line 5 of the unwinding drum 9 is supplied to the welded portion 7 through the guide hole 14 of the operating cylinder 13.

Further, the frame 10 of the knitting machine body 1 has a pair of transmitting and receiving, with the rotational orbit a of the actuating cylinder 13 being sandwiched in the transverse direction thereof, at the outer and inner sides thereof at circumferential intervals. Member 20 on one side (transmitting side) of the optical sensor
a and 21a are arranged in a row, and the other (reception side) members 20b and 21b are also arranged in a row at the position facing the one member on the drum mounting frame 2. As a result, the actuating cylinder 13 swings to the outside or the inside of the rotation path a, so that the light from the optical sensor is blocked and the swinging state is detected.

In the above apparatus, the vertical bars 4 and 4 of the reinforcing bar basket 3 are inserted into the bar arrangement plate 12 of the knitting machine main body 1 and projected from the front end thereof, where they are engaged with the mounting plate 22 for transfer. Be worn. Then, while rotating the mounting plate 22 in the direction of the arrow in FIG. 1 to pull out the vertical bars 4 and 4, the rotary ring 6 and the rotary cylinder 18 are rotated to unwind the spiral bar 5 from the unwinding drum 9, and The spiral muscle 5 is supplied from the operating cylinder 13 to the welding portion 7, and the welding portion 7 and the guide arm 8 that rotate are operated.
By means of 13, the spiral muscle 5 is wound around the outside of the vertical muscles 4, 4 and welded and fixed.

In this process, in order for the welding of the spiral muscle 5 to be carried out normally, it is necessary that the amount of the spiral muscle 5 consumed in the welded portion 7 is always the same as the amount unwound from the unwinding drum 9. Is. In the above device, the optical sensor members 20a, 20b, 21a, 21b provided at a plurality of positions detect the operating cylinder 13 that swings according to the increase or decrease of the unwinding amount of the spiral muscle 5,
The result is electrically fed back to increase or decrease the number of rotations of the unwinding drum 9 to maintain an appropriate unwinding amount.

That is, when the amount of unwinding of the spiral muscle 5 is similar to the amount of consumption, as shown in FIGS. 2 and 3, the actuating cylinder 13 is in a state along its rotational path a, but the unwinding amount is When the helical muscle 5 is insufficient for pulling, the distal end portion of the actuating cylinder 13 is swung so as to approach the inside of the rotation track a as shown in FIG. As a result, the light between the inner sensor members 21a and 21b is blocked. On the other hand, when the amount of unwinding increases and the spiral muscle 5 loosens freely, as shown in FIG. 5, the tip end of the actuating cylinder 13 is swung so as to be closer to the outside of the rotation track a. The light between the outer sensor members 20a and 20b is blocked.

The sensor members 20b and 21b are connected to the rotation control circuit of the drive motor of the rotary cylinder 18 which rotates the unwinding drum 9, and when the light between the sensor members 21a and 21b on the inside is blocked. The signal causes the number of rotations of the unwinding drum 9 to increase, and the sensor member 20 on the outside
When the light between a and 21b is blocked, the rotation speed of the unwinding drum 9 is lowered by the signal. As a result, the amount of unwinding of the spiral muscle 5 is increased or decreased, and an appropriate amount of unwinding is maintained.

[0016]

As described above, according to the present invention,
When the amount of unwinding of the helical muscle supplied to the welded part from the unwinding drum is insufficient or increased, the posture of the operating cylinder changes, which cuts off the light from the sensors and cuts off the light. The number of rotations of the drive motor for the unwinding drum is increased or decreased by the signal of the sensor so that the amount of unwinding from the unwinding drum can be automatically controlled.

Therefore, in the conventional knitting of the reinforcing bar basket, it is possible to automatically perform an unmanned operation, which requires a skilled person to control the rotation of the unwinding drum for supplying the spiral muscles, thereby saving labor and work. It is possible to improve the sex.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a front view of the same knitting machine body.

FIG. 3 is an enlarged front view showing a normal posture state of an operating cylinder.

FIG. 4 is an enlarged front view showing a state when the unwinding of the spiral muscle is insufficient.

FIG. 5 is an enlarged front view showing a state when the unrolling of the spiral muscle is increased.

[Explanation of symbols]

 1 Knitting machine main body 2 Drum mounting frame 3 Reinforcing bar basket 4 Vertical bar 5 Helix bar 6 Rotating ring 7 Welding part 8 Guide arm 9 Unwinding drum 13 Actuating cylinder 18 Rotating cylinder 20a, 20b One of sensor 21a, 21b sensor The other member of

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Genma Genma 4-8-17 Kanda, Kurashiki-shi, Okayama (72) Inventor Hiroshi Koshiba 5-16-19 Higashikoiwa, Edogawa-ku, Tokyo

Claims (1)

[Claims] In a rebar cage knitting machine that moves the vertical bars arranged on the circumference and supplies the spiral bars to the welds that rotate around them to fix them, the spiral bars that are unwound from the unwinding drum are , A sensor provided to a guide arm that rotates together with the welding portion, supplies the welding portion through an operating cylinder that swings according to the tension and looseness of the spiral muscle, and detects the swing of the operating cylinder. An automatic supply device for a spiral muscle in a reinforcing bar basket knitting machine, characterized in that the number of rotations of the unwinding drum can be increased or decreased according to a signal.