Rebar processing machine

Abstract

To provide a reinforcing bar processing machine capable of processing reinforcing bars with high precision. [Solution] A rebar processing machine comprising a processing unit that processes rebar, a transport unit that transports the rebar to the processing unit, a supply unit that supplies the rebar to the transport unit, and a discharge unit that discharges the rebar from the transport unit before the transport of the rebar by the transport unit based on the condition of the rebar supplied to the transport unit.

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a rebar processing machine. [Background technology]

[0002] Patent documents 1 to 3 describe devices for processing reinforcing bars. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2005 / 080021 [Patent Document 2] International Publication No. 2009 / 109846 [Patent Document 3] European Patent Application Publication No. 1356875 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of the present disclosure aims to provide a reinforcing bar processing machine that can process reinforcing bars efficiently. [Means for solving the problem]

[0005] The technology of the present disclosure is as follows: In the following, the corresponding components in the embodiments described later are described in parentheses, but the present invention is not limited to these.

[0006] (1) a processing unit (processing unit 20) that processes reinforcing bars; a conveying unit (conveying unit 30) that conveys the reinforcing bar to the processing unit; A supply unit (supply unit 40) that supplies reinforcing bars to the transport unit; A reinforcing bar processing machine (reinforcing bar processing machine 1) equipped with a discharge section (discharge section 50) that discharges the reinforcing bar from the conveying section before the conveying section transports the reinforcing bar based on the condition of the reinforcing bar supplied to the conveying section.

[0007] (2) (1) The reinforcing bar processing machine according to The conveying section includes a first roller (lower roller 31) and a second roller (upper roller 32) facing the first roller, the second roller is configured to be movable in a direction in which the first roller and the second roller are arranged (up and down direction); The supply unit is capable of supplying reinforcing bars between the first roller and the second roller, the conveying unit performs a process of moving the second roller closer to the first roller (roller lowering process) while the reinforcing bar is being supplied by the supply unit; The discharge unit acquires information (first on signal or second on signal) based on the movement position of the second roller moved by the processing as information indicating the state of the reinforcing bar, and discharges the reinforcing bar based on the information.

[0008] (3) (2) The reinforcing bar processing machine according to the present invention, the conveying unit includes two pairs of the first roller and the second roller (roller pairs C); The two sets are arranged side by side in the reinforcing bar transport direction (left and right direction), The discharge unit discharges the reinforcing bar when it acquires the information (first on signal) indicating that the movement position of the second roller (upper roller 32L) located downstream in the conveying direction is the first position (movement position P2), The first position is a position closer to the first roller than the position of the second roller (movement position P1) when one reinforcing bar is clamped between the first roller and the second roller (the state shown in Figure 3).

[0009] (4) A reinforcing bar processing machine according to (2) or (3), The discharge unit discharges the reinforcing bar when it acquires the information (second on signal) indicating that the movement position of the second roller is the second position (movement position P3), The second position is the position of the second roller when two reinforcing bars aligned in the direction in which the first roller and the second roller are aligned are clamped between the first roller and the second roller (the state shown in Figure 5).

[0010] (5) (2) The reinforcing bar processing machine according to the present invention, The discharge unit discharges the reinforcing bar when it acquires the information (first on signal or second on signal) indicating that the movement position of the second roller is either the first position (movement position P2) or the second position (movement position P3), The second position is a position farther from the first roller than the first position.

[0011] (6) (5) A reinforcing bar processing machine according to the present invention, The distance between the first position and the second position is greater than the diameter of the reinforcing bar.

[0012] (7) A reinforcing bar processing machine according to any one of (1) to (6), A detection unit (detection unit 41) is provided to detect the number of reinforcing bars supplied to the transport unit, The discharge unit acquires the number of reinforcing bars detected by the detection unit as information indicating the state of the reinforcing bars, and discharges the reinforcing bars if the number differs from a predetermined number. [Effects of the Invention]

[0013] According to (1), if the rebar supplied to the conveying unit is in a state unsuitable for transportation or processing, the rebar can be removed from the conveying unit before being transported by the conveying unit. This prevents unintended processing of the rebar and prevents breakdowns in the conveying unit or processing unit. In addition, since it is not necessary to stop the machine and remove the rebar from the processing unit or conveying unit, processing efficiency can be improved.

[0014] According to (2), the condition of the reinforcing bar can be determined based on the movement position of the second roller, which reduces the cost required for determining the condition and also makes it possible to downsize the machine.

[0015] According to (3), for example, a state in which a reinforcing bar is placed between the first and second rollers of the upstream pair in the conveying direction, but no reinforcing bar is placed between the first and second rollers of the downstream pair in the conveying direction, can be determined from the movement position of the downstream second roller. This makes it possible to prevent improper conveyance of the reinforcing bar.

[0016] According to (4), for example, the state in which two reinforcing bars are overlapping and placed between the first roller and the second roller can be determined by the movement position of the second roller, which prevents the reinforcing bars from being transported or processed improperly.

[0017] According to (5) and (6), for example, when the second roller moves to a first position that is sufficiently close to the first roller, it can be determined that no rebar is placed between the first roller and the second roller, and the rebar can be discharged. Also, when the second roller moves to a second position that is sufficiently far from the first roller, it can be determined that multiple rebars are placed overlapping each other between the first roller and the second roller, and the rebar can be discharged. This prevents the rebars from being transported improperly.

[0018] According to (7), a predetermined number of reinforcing bars can be transported to the processing section, so that appropriate processing can be performed. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram showing a general configuration of a reinforcing bar processing machine 1 according to one embodiment of the technology of the present disclosure. [Figure 2] FIG. 2 is a schematic diagram of the reinforcing bar processing machine 1 shown in FIG. 1 as seen from above. [Figure 3] FIG. 3 is a schematic diagram for explaining the operation (part 1) of the transport unit 30. In FIG. [Figure 4] FIG. 4 is a schematic diagram for explaining the operation (part 2) of the transport unit 30. In FIG. [Figure 5] FIG. 5 is a schematic diagram for explaining the operation (part 3) of the transport unit 30. In FIG. [Figure 6] FIG. 6 is a flowchart for explaining the operation of the reinforcing bar processing machine 1 when processing reinforcing bars one by one. [Figure 7] FIG. 7 is a flowchart for explaining the operation of the reinforcing bar processing machine 1 when processing two reinforcing bars at a time. DETAILED DESCRIPTION OF THE INVENTION

[0020] FIG. 1 is a schematic diagram showing the overall configuration of a reinforcing bar processing machine 1 according to one embodiment of the technology disclosed herein. FIG. 2 is a schematic diagram of the reinforcing bar processing machine 1 shown in FIG. 1, viewed from above. FIG. 1 shows an upward direction U as a direction perpendicular to the floor surface on which the reinforcing bar processing machine 1 is installed, and an opposite downward direction D, which are collectively referred to as the up-down direction. FIG. 1 and FIG. 2 show a leftward direction L and an opposite rightward direction R as directions perpendicular to the up-down direction, which are collectively referred to as the left-right direction. Reinforcing bars 12 processed by the reinforcing bar processing machine 1 are transported from the rightward direction R to the leftward direction L. The left side of the left-right direction is defined as the downstream side of the transport direction of the reinforcing bar 12, and the right side of the left-right direction is defined as the upstream side of the transport direction of the reinforcing bar 12. FIG. 2 shows a forward direction Fr and an opposite backward direction Rr as directions perpendicular to the up-down direction and the left-right direction, which are collectively referred to as the front-rear direction.

[0021] The reinforcing bar processing machine 1 includes a base 10 installed on a floor or the like, a processing unit 20 that processes reinforcing bars 12, a transport unit 30 that transports the reinforcing bars 12 to the processing unit 20, a supply unit 40 that supplies the reinforcing bars 12 to the transport unit 30, and a discharge unit 50 that discharges the reinforcing bars 12 from the transport unit 30 based on the condition of the reinforcing bars 12 supplied to the transport unit 30 before the transport by the transport unit 30. The processing unit 20, the transport unit 30, the supply unit 40, and the discharge unit 50 are provided on the base 10. The base 10 is provided with a waiting area 11 where the reinforcing bars 12 to be processed are kept waiting.

[0022] The supply unit 40 removes the rebars 12 from the waiting area 11 and supplies them to a predetermined area in the conveying unit 30. Well-known methods can be used for the method of removal of the rebars 12 by the supply unit 40 and the method of supplying the rebars 12 to the conveying unit 30. For example, an arm including an electromagnet at its tip is moved to the waiting area 11, the rebars 12 are held by the electromagnet, the arm is moved to the conveying unit 30 in this state, and the magnetic force of the electromagnet is removed in the conveying unit 30, thereby supplying the rebars 12 to the conveying unit 30. The rebars 12 may also be supplied to the conveying unit 30 using a robot arm capable of holding the rebars 12. The supply unit 40 can operate in two modes, one for supplying the rebars 12 to the conveying unit 30 one by one and the other for supplying the rebars 12 to the conveying unit 30 multiple by one, depending on the processing content of the rebars.

[0023] The supply unit 40 is preferably provided with a detection unit 41 that detects the number of reinforcing bars 12 supplied to the conveying unit 30. The detection unit 41 is configured, for example, with a laser sensor. By providing the detection unit 41, it becomes possible to determine whether the intended number of reinforcing bars 12 has been supplied to the conveying unit 30.

[0024] The conveying section 30 has two roller sets C, each including a lower roller 31 and an upper roller 32 arranged opposite and above the lower roller 31. The two roller sets C are arranged side by side in the left-right direction. The lower roller 31 included in the left roller set C will also be referred to as lower roller 31L. The upper roller 32 included in the left roller set C will also be referred to as upper roller 32L. The lower roller 31 included in the right roller set C will also be referred to as lower roller 31R. The upper roller 32 included in the right roller set C will also be referred to as upper roller 32R.

[0025] The lower roller 31 is a drive roller that is fixed in position and rotated by, for example, a motor. The upper roller 32 is configured to be movable in the vertical direction and is, for example, a driven roller. The supply unit 40 supplies the reinforcing bar 12 so that the reinforcing bar 12 is placed between the lower roller 31 and the upper roller 32 of each of the two roller sets C.

[0026] The conveying unit 30 further includes an air cylinder 33 provided for each roller set C. The air cylinder 33L provided for the left roller set C has its rod fixed to the upper roller 32L. The air cylinder 33R provided for the right roller set C has its rod fixed to the upper roller 32R. The rods of the air cylinders 33L and 33R move up and down, causing the upper rollers 32L and 32R to move up and down.

[0027] The conveying section 30 rotates the lower roller 31 while the reinforcing bar 12 is sandwiched between the lower roller 31 and the upper roller 32, thereby sending out the reinforcing bar 12 in the left direction L and conveying it to the processing section 20.

[0028] The processing unit 20 cuts, bends, or both cuts and bends the reinforcing bars 12 transported from the transport unit 30.

[0029] The discharge unit 50 includes a control unit 51, a discharge plate 52, and an actuator 53 such as a solenoid or air cylinder connected to the discharge plate 52. The control unit 51 includes a processor such as a CPU (Central Processing Unit) and a memory, and the processor executes programs to perform various processes. The control unit 51 may include a single processor or multiple processors. When the control unit 51 is configured with multiple processors, the processors do not need to be located in the same place and may be located in different places. The control unit 51 controls the actuator 53, the processing unit 20, the conveying unit 30, and the supply unit 40, etc.

[0030] The discharge plate 52 is provided between the conveying unit 30 and the supply unit 40. As shown in Fig. 2, the discharge plate 52 is provided at a position facing the waiting area 11 in the front-to-rear direction, sandwiching the reinforcing bars 12 supplied to the conveying unit 30 by the supply unit 40. The discharge plate 52 is formed, for example, of a flat plate, and is provided with its thickness direction coinciding with the front-to-rear direction.

[0031] As shown in Fig. 1, the discharge plate 52 is provided in a position where it partially overlaps, as viewed in the front-to-rear direction, with the reinforcing bars 12 supplied to the conveying unit 30 by the supply unit 40. There are also cases where two reinforcing bars 12 are supplied by the supply unit 40 between the lower roller 31 and the upper roller 32. In this case, the two reinforcing bars 12 may be arranged vertically side by side (i.e., vertically overlapping) between the lower roller 31 and the upper roller 32. Even when two reinforcing bars 12 are supplied overlapping in this way, the discharge plate 52 is provided in a position where it partially overlaps each of the two reinforcing bars 12 as viewed in the front-to-rear direction.

[0032] When the reinforcing bars 12 have been supplied to the conveying section 30, the discharge plate 52 can be moved in the forward direction Fr from the position shown in FIG. 2 to push the reinforcing bars 12 in the forward direction Fr by the discharge plate 52, and discharged from the conveying section 30. In this embodiment, in the top view shown in FIG. 2, the reinforcing bars 12 are supplied between the discharge plate 52 and the waiting area 11. Therefore, the reinforcing bars 12 pushed in the forward direction Fr by the discharge plate 52 can be discharged into the waiting area 11.

[0033] Fig. 3 is a schematic diagram for explaining the operation (part 1) of the conveying unit 30. Fig. 3 shows an ideal state in which one reinforcing bar 12 is supplied to the conveying unit 30 by the supply unit 40 and the reinforcing bar 12 is arranged between the lower roller 31L and the upper roller 32L, and between the lower roller 31R and the upper roller 32R.

[0034] As shown in Fig. 3, after the reinforcing bar 12 is supplied to the conveying section 30, the air cylinder 33 is operated under the control of the control section 51 to perform a process of moving the upper roller 32 closer to the lower roller 31 (hereinafter referred to as the roller lowering process). Fig. 3 shows the initial position P0 of the upper roller 32 and the position P1 to which the upper roller 32 moves when it descends and abuts against the reinforcing bar 12. When the upper roller 32 abuts against the reinforcing bar 12, the air cylinder 33 stops and the roller lowering process ends.

[0035] 3, the distance M1 between the initial position P0 and the movement position P1 is the amount of movement of the upper roller 32 caused by the roller lowering process. The reinforcing bar processing machine 1 is configured so that when the distance between the lower roller 31 and the upper roller 32 becomes substantially the same as the diameter D of the reinforcing bar 12, the amount of movement of the upper roller 32 becomes the distance M1.

[0036] Fig. 4 is a schematic diagram for explaining the operation (part 2) of the conveying unit 30. Fig. 4 shows a state in which one reinforcing bar 12 is supplied to the conveying unit 30 by the supply unit 40, but the reinforcing bar 12 is not positioned between the lower roller 31L and the upper roller 32L, but is positioned only between the lower roller 31R and the upper roller 32R.

[0037] As shown in Fig. 4, after the reinforcing bar 12 is supplied to the conveying section 30, the air cylinder 33 is operated under the control of the control section 51 to perform the roller lowering process. In the example of Fig. 4, the upper roller 32R stops when it contacts the reinforcing bar 12, as in Fig. 3. Meanwhile, there is no reinforcing bar 12 between the upper roller 32L and the lower roller 31L. Therefore, the upper roller 32L moves to a movement position P2, which is the lowering limit. When the upper roller 32L reaches the movement position P2, the air cylinder 33L stops, and the roller lowering process for the upper roller 32L ends.

[0038] 4 shows the initial position P0 of the upper roller 32L and the movement position P2 of the upper roller 32L when the upper roller 32L descends and approaches the lower roller 31L closest. As described above, the movement position P2 is the position when the upper roller 32L descends to its limit. In this example, the distance M2 between the initial position P0 and the movement position P2 is the amount of movement of the upper roller 32L due to the roller lowering process. The distance M2 is greater than the distance M1 shown in FIG. 3.

[0039] As shown in FIG. 4, the air cylinder 33L is provided with a first auto switch SW1. The first auto switch SW1 is configured to output a first ON signal (a signal indicating that a rebar has not been detected) when the movement amount of the upper roller 32L reaches a distance M2. In other words, when the roller lowering process is performed and the movement of the upper roller 32L is stopped, and the upper roller 32L is at a movement position P2, the first auto switch SW1 outputs the first ON signal. The movement position P2 is a position lower (toward the lower roller 31L) than the movement position P1 shown in FIG. 3.

[0040] The first ON signal is information indicating that the upper roller 32L has moved to the movement position P2 by the roller lowering process, and is information based on the movement position of the upper roller 32L moved by the roller lowering process. The first ON signal is sent to the control unit 51. Note that the first ON signal is not output in the state shown in FIG. 3. Therefore, depending on whether the first ON signal is output or not, it can be determined whether the reinforcing bar 12 supplied to the conveying unit 30 is in the state shown in FIG. 3 or the state shown in FIG. 4. In other words, the first ON signal can be treated as information indicating the state of the reinforcing bar 12 supplied to the conveying unit 30.

[0041] If the control unit 51 receives the first ON signal at the end of the roller lowering process, it determines that the reinforcing bar 12 is not positioned between the lower roller 31L and the upper roller 32L. If the lower roller 31 is rotated to start conveying the reinforcing bar 12 in this state, the left end of the reinforcing bar 12 may collide with the upper roller 32L, which may cause a malfunction. Therefore, in this case, the control unit 51 activates the discharge plate 52 to discharge the reinforcing bar 12. This prevents malfunction of the conveying unit 30. Note that, at this time, it is preferable that the control unit 51 move the upper roller 32R to a position where it does not come into contact with the reinforcing bar 12 (e.g., the initial position P0) before activating the discharge plate 52. This reduces the load on the lower roller 31R and the upper roller 32R when discharging the reinforcing bar 12.

[0042] Fig. 5 is a schematic diagram for explaining the operation (part 3) of the conveying unit 30. Fig. 5 shows a state in which two reinforcing bars 12 are arranged between the lower roller 31L and the upper roller 32L and between the lower roller 31R and the upper roller 32R by the supply unit 40, and the two reinforcing bars 12 are aligned vertically and overlap each other.

[0043] As shown in Fig. 5, after two reinforcing bars 12 are supplied to the conveying unit 30, the air cylinder 33 is operated under the control of the control unit 51 to perform the roller lowering process. In the example of Fig. 5, the roller lowering process ends when the upper roller 32 abuts against the upper of the two reinforcing bars 12.

[0044] 5 shows the initial position P0 of the upper roller 32 and the position P3 to which the upper roller 32 moves when it comes into contact with the reinforcing bar 12 and stops moving downward. In this example, the distance M3 between the initial position P0 and the position P3 is the amount of movement of the upper roller 32 caused by the roller lowering process. Distance M3 is smaller than distance M1 shown in FIG. 3. The reinforcing bar processing machine 1 is configured so that the amount of movement of the upper roller 32 is distance M3 when the distance between the lower roller 31 and the upper roller 32 becomes approximately equal to twice the diameter D of the reinforcing bar 12.

[0045] As shown in FIG. 5, the air cylinder 33 is provided with a second auto switch SW2. The second auto switch SW2 is configured to output a second ON signal (a signal indicating that a rebar overlap has been detected) when the amount of movement of the upper roller 32 reaches a distance M3. In other words, when the roller lowering process is performed and the movement of the upper roller 32 has stopped, and the upper roller 32 is at a movement position P3, the second auto switch SW2 outputs the second ON signal. The movement position P3 is farther from the lower roller 31 than the movement position P2 shown in FIG. 4. The distance between the movement position P3 and the movement position P2 is greater than the diameter D of the rebar 12.

[0046] The second ON signal is information indicating that the upper roller 32 has moved to the movement position P3 by the roller lowering process, and is information based on the movement position of the upper roller 32 moved by the roller lowering process. The second ON signal is sent to the control unit 51. In the states shown in Figures 3 and 4, the second ON signal is not output. Therefore, depending on whether the second ON signal is output or not, it can be determined whether the reinforcing bar 12 supplied to the conveying unit 30 is in the state shown in Figures 3 and 4 or the state shown in Figure 5. In other words, the second ON signal can be treated as information indicating the state of the reinforcing bar 12 supplied to the conveying unit 30.

[0047] If the control unit 51 receives the second ON signal at the end of the roller lowering process, it determines that the rebar 12 is overlapping between the lower roller 31 and the upper roller 32. If the lower roller 31 is rotated to start conveying the rebar 12 in this state, the conveyance itself may not proceed smoothly, the intended processing may not be performed at the processing unit 20 at the destination, or the processing unit 20 may be damaged. Therefore, in this case, the control unit 51 activates the discharge plate 52 to discharge the rebar 12. This prevents breakdowns in the processing unit 20 and the conveyance unit 30. It is preferable that the control unit 51 move the upper roller 32 to a position where it does not come into contact with the rebar 12 (e.g., the initial position P0) before activating the discharge plate 52. This reduces the load on the lower roller 31 and the upper roller 32 when discharging the rebar 12.

[0048] In this way, in the reinforcing bar processing machine 1, based on the first on signal and the second on signal, the reinforcing bar 12 supplied to the conveying section 30 can be discharged from the conveying section 30 by the discharge section 50 before being transported.

[0049] The control unit 51 may further discharge the reinforcing bars 12 based on the number of reinforcing bars 12 detected by the detection unit 41. For example, when the number of reinforcing bars 12 detected by the detection unit 41 is different from a predetermined number, the control unit 51 activates the discharge plate 52 to discharge the reinforcing bars 12. For example, when processing reinforcing bars 12 one by one, if two or more reinforcing bars are supplied to the conveying unit 30, the two or more reinforcing bars are discharged. Also, when processing reinforcing bars 12 two by two, if only one reinforcing bar is supplied to the conveying unit 30, the one reinforcing bar is discharged. In this way, the control unit 51 obtains the number of reinforcing bars 12 as information indicating the state of the reinforcing bars 12 supplied to the conveying unit 30, and discharges the reinforcing bars 12 based on the number.

[0050] 6 is a flowchart for explaining the operation of the reinforcing bar processing machine 1 when processing reinforcing bars one by one. The control unit 51 controls the supply unit 40 to supply one reinforcing bar 12 to the transport unit 30 (step S11). When the supply unit 40 finishes supplying the reinforcing bars 12, the control unit 51 obtains the number of reinforcing bars 12 detected by the detection unit 41 (step S12).

[0051] Next, the control unit 51 determines whether the acquired number is one or not (step S13). If the determination in step S13 is NO (if the number is two or more), the control unit 51 activates the discharge plate 52 to discharge the reinforcing bar 12 (step S18). After step S18, the process returns to step S11.

[0052] If the determination in step S13 is YES, the control unit 51 performs roller lowering processing (step S14). After completing the roller lowering processing, if the control unit 51 has received a first ON signal from the first auto switch SW1 (step S15: YES), it performs processing in step S18, and if the control unit 51 has not received a first ON signal from the first auto switch SW1 (step S15: NO), it performs processing in step S16.

[0053] In step S16, the control unit 51 drives the lower rollers 31 to transport the reinforcing bars 12 supplied to the transport unit 30. The reinforcing bars 12 transported in step S16 are then processed in the processing unit 20 (step S17), and the process ends.

[0054] Fig. 7 is a flowchart for explaining the operation of the reinforcing bar processing machine 1 when processing two reinforcing bars at a time. The flowchart shown in Fig. 7 is the same as Fig. 6 except that step S13 in Fig. 6 has been changed to step S13A and step S21 has been added between step S14 and step S15, so the same processes are given the same reference numerals and their explanations will be omitted.

[0055] After step S12, the control unit 51 determines whether the number of reinforcing bars 12 is two or not (step S13A). If the determination in step S13A is NO, the process of step S18 is performed, and if the determination in step S13A is YES, the process of step S14 is performed.

[0056] When the roller lowering process in step S14 is completed, if the control unit 51 has received a second ON signal from the second auto switch SW2 (step S21: YES), it performs the process of step S18, and if the control unit 51 has not received a second ON signal from the second auto switch SW2 (step S21: NO), it performs the process of step S15. The order of steps S21 and S15 may be reversed.

[0057] As described above, according to the reinforcing bar processing machine 1, if the reinforcing bar 12 supplied to the conveying unit 30 is in a state unsuitable for transportation or processing, the reinforcing bar 12 can be discharged from the conveying unit 30 before being transported by the conveying unit 30. This prevents unintended processing of the reinforcing bar 12 and prevents breakdowns in the conveying unit 30 and the processing unit 20. Furthermore, since the process returns to step S11 after step S18, there is no need to stop the machine, which improves processing efficiency. In particular, since the reinforcing bar 12 can be returned to the standby area 11 in step S18, processing can be performed more efficiently.

[0058] In the above description, information based on the movement position of the upper roller 32 is obtained by an auto switch provided on the air cylinder 33, but this is not limited to this. For example, an optical encoder or the like may be used to detect the amount of movement of the upper roller 32 when the roller lowering process has been performed and the movement has stopped, and if the detected amount of movement is distance M2 or distance M3, the control unit 51 may determine that the upper roller 32L is at movement position P2 or movement position P3. In this case, the amount of movement detected by the encoder or the like becomes information based on the movement position of the upper roller 32L when the roller lowering process has been performed. [Explanation of symbols]

[0059] 1. Rebar processing machine 10 Foundations 11 Standby area 12 Reinforced concrete 20 Processing Department 30 Conveying section 31, 31L, 31R Lower roller 32, 32L, 32R upper roller 33, 33L, 33R Air Cylinder 40 Supply section 41 Detector 50 Discharge section 51 Control section 52 Discharge plate 53 Actuator P0 initial position P1,P2,P3 movement position M1,M2,M3 distance SW1 No. 1 auto switch SW2 Second auto switch

Claims

1. a processing unit that processes rebar; A conveying unit that conveys reinforcing bars to the processing unit; a supply unit that supplies reinforcing bars to the transport unit; A reinforcing bar processing machine comprising: a discharge unit that discharges the reinforcing bar from the conveying unit before the conveying unit transports the reinforcing bar based on the condition of the reinforcing bar supplied to the conveying unit.

2. The reinforcing bar processing machine according to claim 1, the conveying section includes a first roller and a second roller facing the first roller, the second roller is configured to be movable in a direction in which the first roller and the second roller are aligned, The supply unit is capable of supplying reinforcing bars between the first roller and the second roller, the conveying unit performs a process of moving the second roller closer to the first roller while the reinforcing bar is being supplied by the supplying unit; The discharge unit acquires information based on the movement position of the second roller moved by the processing as information indicating the state of the reinforcing bar, and discharges the reinforcing bar based on the information.

3. The reinforcing bar processing machine according to claim 2, the conveying unit includes two pairs of the first roller and the second roller; The two sets are arranged side by side in the conveying direction of the reinforcing bar, the discharge unit discharges the reinforcing bar when the information indicating that the movement position of the second roller located downstream in the conveying direction is a first position is acquired, A rebar processing machine, wherein the first position is a position closer to the first roller than the position of the second roller when one rebar is clamped between the first roller and the second roller.

4. The reinforcing bar processing machine according to claim 2, the discharge unit discharges the reinforcing bar when the information indicating that the movement position of the second roller is a second position is acquired, The second position is the position of the second roller when two reinforcing bars aligned in the direction in which the first roller and the second roller are aligned are clamped between the first roller and the second roller.

5. The reinforcing bar processing machine according to claim 2, the discharge unit discharges the reinforcing bar when the information indicating that the movement position of the second roller is either a first position or a second position is acquired, The second position is a position farther from the first roller than the first position.

6. The reinforcing bar processing machine according to claim 5, A rebar processing machine, wherein the distance between the first position and the second position is greater than a diameter of the rebar.

7. A reinforcing bar processing machine according to any one of claims 1 to 6, A detection unit is provided to detect the number of reinforcing bars supplied to the transport unit, The discharge unit acquires the number of reinforcing bars detected by the detection unit as information indicating the state of the reinforcing bars, and discharges the reinforcing bars if the number differs from a predetermined number.

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