KR100717580B1 - Apparatus for controlling shear of bar - Google Patents

Abstract

The present invention relates to a reinforcing bar cutting control device capable of preventing an abnormal reinforcing bar cutting in advance, and a reinforcing bar cutting control device for cutting a reinforcing bar that has been conveyed to a blade and returning the blade to an allowable range of an initial position, A conductive part connected to the connected power output shaft and rotating in accordance with the driving degree of the blade; A sensing unit installed at a position corresponding to the outside of the allowable range so as to be spaced apart from the conductor unit and detecting whether the conductor unit pivoted according to the rotation of the power output shaft after the cutting of the reinforcing bar is located outside the allowable range; And a control unit for stopping the driving of the blade when a sensing signal is input from the sensing unit.

Description

[0001] Apparatus for controlling shear of bar [0002]

1 is a block diagram of a reinforcing bar cutting control apparatus according to an embodiment of the present invention;

FIG. 2 is a front view of a cutter to which a reinforcing bar cutting control apparatus according to an embodiment of the present invention is applied,

Fig. 3 is a view of the cutter of Fig. 2 viewed from the back. Fig.

[Description of Drawings]

10: conductor section 12: first sensing section

14: second sensing unit 16: push button

18: clamp 20: clamp drive part

22: Blade 24: Blade Drive

26: warning part 28: warning driving part

30: control unit 40:

42: Rebar 44: Cutting edge area

46: Power output shaft 48: Bracket

100: Cutter main body

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reinforcing bar cutting control device, and more particularly, to a reinforcing bar cutting control device that prevents abnormal reinforcing bar cutting.

Generally, a rolling process is a process of forming a thin layer by applying a continuous force while sandwiching a material such as a steel ingot or a steel piece between two rotating rolls and gradually narrowing the gap between the rolls. Products made by such a rolling process include reinforcing bars and steel plates.

The reinforcing steel or steel plate produced through the rolling process is cut in the longitudinal direction or the width direction by a predetermined dimension through the cutting process. Hereinafter, a case of cutting a reinforcing bar will be described as an example. A steel bar of about 60 m made by the rolling process is separated into a plurality of reinforcing bars having a length of about 10 m through a cutting process.

A cutter is used to perform the cutting process. Typically, the cutter includes a clamp for clamping the conveyed reinforcing bar, a blade for cutting the reinforced bar clamped by the clamp, and driving means for driving the clamp and the blade.

The cutter also includes a control means for causing the blade to stop at the top dead center after one cycle of rebar cutting and then to perform the next cycle. For example, if a reinforcing bar of about 60 m is cut every 10 m, it is separated into six reinforcing bars. The process of making one 10m rebar is called one cycle.

The control means employed in the cutter interlocks with the rotary cam switch in the rotary cam switch box. In other words, a typical rotary cam switch box is equipped with a plurality of rotary cam switches including a rotary cam switch for top dead center and a rotary cam switch for bottom dead center. The top dead center, bottom dead center, operating conditions and the like are determined by such a plurality of rotary cam switches.

It can be considered that each of the rotary cams is constituted by a rotary cam gear having projections and a contact switch brought into contact with the projections.

Therefore, the control means can judge whether the top dead center or the bottom dead center has reached the contact point based on the contact signal only when the protruding portion contacts the contact switch while the rotary cam gear rotates.

However, when the cutter is used for a long time, the rotary cam switch is also used for a long time, so that the projecting portion of the rotary cam gear is worn and the contact switch is damaged. Further, the shaft of the rotary cam gear may be deformed or broken. As a result, the rotary cam switch fails to operate properly, and the blade also deviates from the top dead center at the beginning of the cycle for the rebar cutting. In a state in which a command to cut the reinforced bar is transmitted, even if the rotary cam switch does not operate properly, the control means outputs a drive command for the blade, so that the blade continues to move up and down at the position deviated from the top dead center. As a result, there arises a problem that the reinforcing bars are cut in an abnormal length rather than a desired length.

In addition, when the reinforcing bars are cut to an abnormal length, the operator often does not immediately know the fact, and unnecessarily wasted reinforcing bars are generated.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a reinforcing bar cutting control device capable of preventing an abnormal reinforcing bar cutting in advance.

In order to accomplish the above object, according to a preferred embodiment of the present invention, there is provided a rebar cutting control apparatus for cutting a conveyed reinforcing bar into a blade and returning the blade to an allowable range of an initial position,

A conductor connected to the power output shaft to which the blade is connected and rotated in accordance with the driving degree of the blade; A sensing unit installed at a position corresponding to the outside of the allowable range so as to be spaced apart from the conductor unit and detecting whether the conductor unit pivoted according to the rotation of the power output shaft after the cutting of the reinforcing bar is located outside the allowable range; And a control unit for stopping the driving of the blade when a sensing signal from the sensing unit is inputted.

Alternatively, the reinforcing bar cutting control device according to the embodiment of the present invention is a reinforcing bar cutting control device that cuts a conveyed reinforcing bar into a blade and returns the blade to an allowable range of an initial position,

A conductor connected to the power output shaft to which the blade is connected and rotated in accordance with the driving degree of the blade; A sensing unit installed at a position corresponding to the outside of the allowable range so as to be spaced apart from the conductor unit and detecting whether the conductor unit pivoted according to the rotation of the power output shaft after the cutting of the reinforcing bar is located outside the allowable range; A control unit for stopping driving of the blade and controlling an output of a warning signal when a sensing signal from the sensing unit is input; And a warning unit driven according to an alarm control signal from the control unit to output a warning signal.

Alternatively, the reinforcing bar cutting control device according to the embodiment of the present invention is a reinforcing bar cutting control device that cuts a conveyed reinforcing bar into a blade and returns the blade to an allowable range of an initial position,

A conductor connected to the power output shaft to which the blade is connected and rotated in accordance with the driving degree of the blade; A first sensing unit installed at a position corresponding to the allowable range and spaced apart from the conductor unit and sensing whether the conductor unit pivoted according to the rotation of the power output shaft after the reinforcing bar is located within the allowable range; A second sensing unit installed at a position corresponding to a position outside the allowable range so as to be spaced apart from the conductor unit and detecting whether the conductor unit pivoted according to the rotation of the power output shaft after the cutting of the reinforcing bar is located outside the allowable range; And a control unit for controlling subsequent barreling when the sensing signal is input from the first sensing unit and stopping the driving of the blade when the sensing signal from the second sensing unit is input.

Alternatively, the reinforcing bar cutting control device according to the embodiment of the present invention is a reinforcing bar cutting control device that cuts a conveyed reinforcing bar into a blade and returns the blade to an allowable range of an initial position,

A conductor connected to the power output shaft to which the blade is connected and rotated in accordance with the driving degree of the blade; A first sensing unit installed at a position corresponding to the allowable range and spaced apart from the conductor unit and sensing whether the conductor unit pivoted according to the rotation of the power output shaft after the reinforcing bar is located within the allowable range; A second sensing unit installed at a position corresponding to a position outside the allowable range so as to be spaced apart from the conductor unit and detecting whether the conductor unit pivoted according to the rotation of the power output shaft after the cutting of the reinforcing bar is located outside the allowable range; A control unit for controlling subsequent barrels to be cut when a sensing signal from the first sensing unit is input and stopping driving of the blades when a sensing signal is input from the second sensing unit and controlling an output of a warning signal; And a warning unit driven according to an alarm control signal from the control unit to output a warning signal.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a reinforcing bar cutting control apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The reinforcing bar cutting control device of the present invention is applied to a cutter that cuts a reinforcing bar fed through a feed path by a predetermined unit length and returns the blade to an initial position (top dead center) when one cutting cycle is completed , According to the present invention, the return to the allowable range of the initial position (the predetermined range) is recognized as a normal return, and a subsequent cutting cycle is performed.

1 is a block diagram of a reinforcing bar cutting control apparatus according to an embodiment of the present invention.

The reinforcing bar cutting control device according to the embodiment of the present invention is connected to a power output shaft (not shown) to which a blade 22 is connected and is connected to a conductor portion (not shown) (10); The conductor section 10 is installed at a position corresponding to the allowable range of the initial position (for example, 10 to 15 degrees with reference to a reference axis to be described later), and is spaced apart from the conductor section 10, 10) is located within the allowable range; A second sensing unit (not shown) installed at a position corresponding to an outside of the allowable range of the initial position and spaced apart from the conductor unit 10 to detect whether the conductor unit 10 rotated by one cycle is located outside the allowable range, 14); The driving of the blade 22 is controlled based on the signals from the first and second sensing units 12 and 14 and the detection signal from the second sensing unit 14 A controller 30 for stopping the driving of the blade 22 and controlling an output of a warning signal when the blade 22 is input; A clamp 18 for clamping a reinforcing bar (not shown) conveyed through a conveyance path (not shown); A clamp driving unit 20 for driving the clamp 18 based on a driving signal of the control unit 30; A blade driving unit (24) for driving the blade (22) based on a driving signal of the controller (30); An alarm unit 26 for outputting a warning signal to the outside; And an alarm driving unit 28 for driving the warning unit 26 in accordance with an alarm control signal from the control unit 30. [

Here, the first and second sensing units 12 and 14 are constituted by proximity sensors, and the warning unit 26 is composed of a blinking lamp. The flashing type in which the lighting and the lighting are alternately turned on can be recognized faster than the lamp-on state only. Of course, the warning unit 26 may be constituted by a sound output member such as a buzzer for outputting a warning sound instead of a lamp.

When the sensing signal from the second sensing unit 14 is inputted, the control unit 30 transmits a warning signal to the cab through a dedicated line (not shown).

1, reference numeral 16 denotes a push button operated by the operator. As the push button 16 is turned on / off, the operation of the cutter is turned on / off. The push button 16 is provided in a cutter main body (not shown).

FIG. 2 is a front view of a cutting apparatus to which a steel bar cutting control apparatus according to an embodiment of the present invention is applied, and FIG. 3 is a rear view of the cutting apparatus of FIG. The cutter of Figs. 2 and 3 is a well-known cutter known to those skilled in the art in the same industry. In the present invention, such a known cutter is employed, but instead of a rotary cam switch, A control unit and a lamp for controlling the rebar cutting are additionally employed.

2, the clamp 18 is connected to the driving shaft 20a of the clamp driving part 20 provided in the cutter main body 100 and moves up and down by the vertical movement of the driving shaft 20a, Clamping or unclamping.

The reinforcing bar 42 is a reinforcing bar of a predetermined length (for example, about 60 m) produced by the cold rolling process and is conveyed along the conveying path 40 to the cutter side, About 10m).

The blade 22 is rotatably installed on a blade holder 44 provided at a front bottom portion of the cutter main body 100 and spaced apart from the feed passage 40 by a predetermined distance. In FIG. 2, the blade 22 is not shown properly, but is installed at the bottom of the blade holder 44. The blade 22 is formed in a disk shape having a plurality of cutting teeth along the outer periphery, and rotates at a high speed. The body of the blade 22 is installed on the blade support 44 perpendicularly to the longitudinal direction of the reinforcing bar 42. Therefore, when the blade 22 rotates at a high speed and the blade support 44 is vertically lowered to some extent, the reinforcing bar 42 is cut by the blade 22.

The blade 22 vertically raises and lowers between the top dead center and the bottom dead center to cut the lower reinforcing bar 42. The blade 22 is vertically moved downward to cut the reinforcing bar 42 and then return to the initial initial position for the next cutting. The initial position above the blade 22 is referred to as a top dead center, And the lowest position at the time when the reinforcing bar 42 is cut is referred to as bottom dead center.

A power output shaft 46 (see FIG. 3) is provided in the cutter main body 100. One end of the power output shaft 46 protrudes from the back surface side of the cutter main body 100 and the protruded power output shaft 46 (See Fig. 3). The conductor portion 10 is rotated together with the power output shaft 46 being rotated. The conductor unit 10 is made of a material (for example, a metal material) that can be sensed by the first and second sensing units 12 and 14. A bracket 48 is provided in front of the conductor 10 and the first sensing unit 12 and the second sensing unit 14 are spaced apart from each other on the bracket 48. In FIG. 3, when a line connecting K and L is referred to as a reference axis, the first sensing unit 12 is rotated about 10 degrees to 15 degrees (? 1 = 10 degrees to 15 degrees,? 2 = 15 degrees), and the second sensing unit 14 is positioned at an angle of 10 degrees to 15 degrees with respect to the reference axis. 3), and when the blade 22 is at the position of K (see FIG. 3) and the blade 22 is at the position of the reinforcing bars 42 When cutting back to the initial position (top dead center) after cutting, the conductor portion 10 is at the position of L (see FIG. 3). Therefore, in the present invention, the first sensing unit 12 senses the conductor unit 10 positioned between the angles? 1 and? 2 with respect to the reference axis, and the second sensing unit 14 senses the conductive unit 10 And detects the conductor section 10 located at an angle of more than 15 degrees. In Fig. 3, the angle from? 1 to? 2 with reference to the reference axis is referred to as the allowable range of the initial position (top dead center). Incidentally, the above-mentioned 10 degrees to 15 degrees is only one example, and can be adjusted as needed. 3, the first sensing unit 12 outputs a sensing signal used to determine a normal return of the blade 22, and the second sensing unit 14 determines an abnormal return of the blade 22 And outputs the used sensing signal. This is determined by which sensing portion senses the conductor portion 10. As the blade 22 rises after the rebar cutting, the position at which the conductor portion 10 rotates and stops is in the vicinity of the top dead center or the top dead center (within the permissible range), but it does not reach the vicinity of the top dead center It is possible to pass the vicinity of the superior point. Therefore, the second sensing unit for outputting the sensing signal used to determine the abnormal return of the blade 22 may be disposed at a position that is not in the vicinity of the top dead center and at a position past the vicinity of the top dead center, Or may be provided only at a position where more conductor portions 10 are present in the positions.

The power output shaft 46 is rotated by a motor (not shown) and a gear (not shown), and a part of the power output shaft 46 is provided with means for raising and lowering the blade support 44 Brakes for stopping at top dead center and bottom dead center are directly or indirectly connected.

The blade driving unit 24 includes a motor, gear, means, brake, and the like, which are associated with the power output shaft 46. The blade support 44 described above is also included in the components of the blade drive unit 24 and means for rotating the blade 22 are also included in the blade drive unit 24. Of course, the blade drive unit 24 is not shown in detail in the drawing, but the blade drive unit 24 is used in a conventional cutter, and is not shown in a separate drawing. The configuration of the blade drive unit 24 can be easily grasped from a known configuration known to those skilled in the art in the same industry.

The warning driving unit 28 can be realized by using a known circuit capable of driving the flashing of the lamp. Those skilled in the art will appreciate that the known driving circuit can be used Able to know.

The warning part 26 driven by the warning driving part 28 is installed at one side of the front part of the cutter main body 100 as illustrated in FIG.

Next, the operation of the reinforcing bar cutting control apparatus according to the embodiment of the present invention will be described as follows.

When the reinforcing bars 42 are conveyed through the conveying path 40, the operator turns the push button 16 on. Accordingly, a signal corresponding thereto is inputted to the control unit 30, and the control unit 30 performs the control of the rebar cutting.

First, the control unit 30 instructs the clamp driving unit 20 to lower the clamp 18. As a result, the clamp 18 is lowered by the clamp driving unit 20 so as to clamp the lower reinforcing bars 42. [ The controller 30 instructs the blade driving unit 24 to lower the blade 22 when a predetermined time (for example, about 1.5 seconds) elapses after the clamp 18 starts to descend. That is, the blade support 44 is lowered and the reinforcing bar 42 is cut by the blade 22. At this time, since the position of the blade 22 at the time of cutting the reinforcing bar 42 is a bottom dead center, the conductor 10 connected to the power output shaft 46 is located at the position of K in FIG.

When the cutting of the reinforcing bar 42 is completed as described above, the blade 22 must be returned to the allowable range of the initial position for the next cycle of the rebar cutting. To this end, the control unit 30 instructs the clamp driving unit 20 to raise the clamp 18, and then commands the blade driving unit 24 to raise the blade 22. The rising blade 22 is temporarily stopped within the allowable range of the initial position by the blade driving unit 24. [ At this time, since the position of the blade 22 is the top dead center or the vicinity thereof, the conductor portion 10 connected to the power output shaft 46 is located at or near the L position in FIG. 3 (that is, within the allowable range). Of course, the raised blade 22 may also be stopped out of tolerance of its initial position. Therefore, the control unit 30 controls the blade driving based on the sensing signals from the first and second sensing units 12 and 14. That is, when the detection signal from the first sensing unit 12 (that is, the signal sensing the conductor unit 10) is input to the controller 30 for a predetermined time, the controller 30 controls the blade 22, Is determined to have returned to within the permissible range, and the rebar cutting of the next cycle is performed. Rebar cutting of the next cycle is performed in the same manner as the rebar cutting process described above. Conversely, only the detection signal from the second sensing unit 14 (that is, the abnormal return signal as a signal sensing the conductor unit 10) is input to the control unit 30 or the first and second sensing units 12 The control unit 30 determines that the blade 22 returns abnormally and controls the blade driving unit 24 to stop the blade 22 at the current position. And drives the warning drive unit 28 together with the warning unit 26 to operate the warning unit 26. [ Accordingly, the warning section 26 is flickered, and the operator, who has noticed that the blinking warning section 26 and the blade 22 are stopped, immediately turns off the push button 16 to stop the operation of the cutter After that, you will be contacted by a department that can make repairs. Thus, the cutter is repaired by the dispatched repair personnel. When the warning unit 26 is operated, the control unit 30 transmits a warning signal to the cab through the leased line to inform the operator of the abnormality of the cutter.

Although two sensing units are used in the above-described embodiment, one sensing unit may be used. In this case, the one sensing unit is installed at a position corresponding to the allowable range of the initial position, and when the sensing signal from the sensing unit is inputted in the control unit, it is judged that the blade has returned to normal. However, if the detection signal from the detection unit is not inputted or the temporary detection signal is input even after elapse of a predetermined time (that is, a sufficient time for the blade to return to the allowable range of the initial position) after the rebar cutting is performed, It is determined that abnormal return has been made and the drive of the blade is stopped and a warning is issued.

As described above in detail, according to the present invention, by using the proximity sensor, the return to the abnormal position of the blade can be quickly grasped and the driving of the blade can be stopped. Thus, abnormal cutting of the reinforcing bars can be prevented, I notice.

When the blade returns to an abnormal position, the operator warns the blade with the stop of the drive, so that the operator immediately recognizes the abnormality of the cutter and can quickly take subsequent actions.

In addition, since the warning signal is also transmitted to the cab, the manager in the cab also becomes aware of the abnormality of the cutter, so that even if the operator breaks his / her seat while the cutter is idle, the follower action may be taken by the manager.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. You must see.

Claims (7)

A reinforcing bar cutting control device for cutting a reinforced bar (42) having been fed with a blade (22) and returning the blade (22) to an allowable range of an initial position, A conductor portion 10 formed at a front end of the power output shaft 46 to which the blade 22 is connected and rotated together with the power output side 46 being rotated; The conductor portion 10 which is provided so as to be spaced apart from the conductor portion 10 at a position corresponding to the outside of the allowable range and which has been rotated in accordance with the rotation of the power output shaft 46 after cutting the reinforcing bar 42, A sensing unit for sensing whether the sensing unit is positioned; And And a control unit (30) for stopping the driving of the blade (22) when a sensing signal from the sensing unit is inputted. A reinforcing bar cutting control device for cutting a reinforced bar (42) having been fed with a blade (22) and returning the blade (22) to an allowable range of an initial position, A conductor portion 10 formed at a front end of the power output shaft 46 to which the blade 22 is connected and rotated together with the power output side 46 being rotated; The conductor portion 10 which is provided so as to be spaced apart from the conductor portion 10 at a position corresponding to the outside of the allowable range and which has been rotated in accordance with the rotation of the power output shaft 46 after cutting the reinforcing bar 42, A sensing unit for sensing whether the sensing unit is positioned; A controller (30) for stopping the driving of the blade (22) and controlling an output of a warning signal when a sensing signal from the sensing unit is input; And And an alarm unit (26) driven according to an alarm control signal from the control unit (30) to output a warning signal. A reinforcing bar cutting control device for cutting a reinforced bar (42) having been fed with a blade (22) and returning the blade (22) to an allowable range of an initial position, A conductor portion 10 formed at a front end of the power output shaft 46 to which the blade 22 is connected and rotated together with the power output side 46 being rotated; The conductor section 10 which is provided so as to be spaced apart from the conductor section 10 at a position corresponding to the allowable range and which is rotated in accordance with the rotation of the power output shaft 46 after the cutting of the reinforcing bars 42 is within the allowable range A first sensing unit (12) which senses whether or not it is positioned; The conductor portion 10 which is provided so as to be spaced apart from the conductor portion 10 at a position corresponding to the outside of the allowable range and which has been rotated in accordance with the rotation of the power output shaft 46 after cutting the reinforcing bar 42, A second sensing unit 14 for sensing whether or not it is positioned; And When the sensing signal from the first sensing unit 12 is input, the control unit controls the subsequent cutting of the reinforcing bars 42. When the sensing signal from the second sensing unit 14 is input, And a control unit (30) for stopping the reinforcing bars. A reinforcing bar cutting control device for cutting a reinforced bar (42) having been fed with a blade (22) and returning the blade (22) to an allowable range of an initial position, A conductor portion 10 formed at a front end of the power output shaft 46 to which the blade 22 is connected and rotated together with the power output side 46 being rotated; The conductor section 10 which is provided so as to be spaced apart from the conductor section 10 at a position corresponding to the allowable range and which is rotated in accordance with the rotation of the power output shaft 46 after the cutting of the reinforcing bars 42 is within the allowable range A first sensing unit (12) which senses whether or not it is positioned; The conductor portion 10 which is provided so as to be spaced apart from the conductor portion 10 at a position corresponding to the outside of the allowable range and which has been rotated in accordance with the rotation of the power output shaft 46 after cutting the reinforcing bar 42, A second sensing unit 14 for sensing whether or not it is positioned; When the sensing signal from the first sensing unit 12 is input, the control unit controls the subsequent cutting of the reinforcing bars 42. When the sensing signal from the second sensing unit 14 is input, A control unit (30) for stopping and controlling an alarm signal output; And And an alarm unit (26) driven according to an alarm control signal from the control unit (30) to output a warning signal. 3. The method according to claim 1 or 2, Wherein the sensing unit comprises a proximity sensor. The method according to claim 2 or 4, And the warning unit (26) is made of a blinking lamp. The method according to claim 3 or 4, Wherein the first and second sensing units (12, 14) comprise proximity sensors.

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