Rod separation device

Abstract

The present invention provides a rod separation device for a circular saw cutting machine that can separate rods one by one along their entire length from a rod on a conveyor and supply them stably to a stock section. [Solution] The system is provided with a predetermined number M of damming stoppers 58 that block the rods BL being transported by the unbundling table chain conveyor 50, and separation levers 60 that are formed in the shape of a right triangle with a slanted side 60c that slopes from the apex 60b toward the damming stopper 58 in the transport direction. As the separation lever 60 moves upward, the apex 60b enters between the leading rod BL and the following rod BL that are blocked by the damming stopper 58, and the slanted side 60c lifts the leading rod BL, allowing it to move over the damming stopper 58 and be sent to the stock section 52, thus performing a separation operation SPBL.

Description

Technical Field

[0001] The present invention relates to a bar separating device that separates bars one by one from a group of bars that are untied and placed in a parallel state and supplies them to a predetermined stock position.

Background Art

[0002] In the case of sizing cutting that repeatedly cuts longitudinal bars such as reinforcing bars, steel bars, and wire rods continuously to a desired length with a circular saw cutting machine, it is desirable to supply a plurality of bars to the circular saw cutting machine in a state where they are aligned horizontally adjacent to each other. The bars have a diameter of about 10 mm and a length of about 5 to 6 m, for example, and are carried in a state where about 100 bars are tied together with a binding band. When they are untied, each bar has low elasticity and is easily deformed, so they often get entangled with each other. When cutting the bars in the circular saw cutting machine, it is required to automatically take out the required number of bars from such a large number of entangled bars in a parallel state after untangling the entanglement. A bar separating device that separates the bars one by one from such a group of parallel bars and supplies them to a predetermined transfer position is known. For example, the bar supply device described in Patent Document 1 is such a device.

[0003] In the bar supply device described in Patent Document 1, a technique is disclosed in which a large number of untied parallel bars are allowed to fall by their own weight to a stock part by conveyor conveyance, and in the process of lifting a plurality of bars staying in the stock part with a lifter and transferring them to the upper stage, the entanglement of the bars is untied and one bar is separated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in the rod feeding device described in Patent Document 1, when the rod was to fall into the stock section under its own weight, due to the low elasticity of the material, the entire length of the rod would not follow the fall, and only a portion of it would fall. When such an event occurred, manual intervention was required to drop the entire length of the rod into the stock section, which presented challenges to the functionality and safety of the automated machine.

[0006] The present invention was made against the above circumstances, and its objective is to provide a rod separation device for a circular saw cutting machine that can separate rods one by one from a conveyor-mounted rod along its entire length and supply them stably to the stock section. [Means for solving the problem]

[0007] In other words, the gist of the first invention is (a) a rod supply device for a circular saw cutting machine that cuts a predetermined number of rods simultaneously, in which a predetermined number of the rods are supplied from a material supply conveyor in an adjacent and aligned state, wherein a rod separation device transports a large number of unbundled parallel rods by an unbundling conveyor in a transport direction intersecting the longitudinal direction of the rods, separates them one by one, and sends them to a predetermined stock section, (b) a damming stopper that dams the rods being transported by the unbundling conveyor, and (c) a right-angled triangular shape having a slanted side that slopes from the apex toward the damming stopper in the transport direction The slanted portion extends beyond the damming stopper in the conveying direction. (d) The separation lever is provided in a predetermined number, and as the separation lever moves upward, the apex portion enters between the leading rod and the subsequent rods of the rods that are blocked by the damming stopper, and the slanted portion lifts the leading rod, causing it to go over the damming stopper and be sent to the stock section, thereby performing a separation operation. Furthermore, the gist of the second invention is (a) a rod supply device for a circular saw cutting machine that cuts a predetermined number of rods simultaneously, in which a predetermined number of the rods are supplied from a material supply conveyor in an adjacent and aligned state, wherein a rod separation device transports a large number of unbundled parallel rods in a transport direction intersecting the longitudinal direction of the rods by an unbundling conveyor, separates them one by one, and sends them to a predetermined stock section, (b) a damming stopper that dams the rods being transported by the unbundling conveyor, and (c) the cross section in the transport direction is inclined from the apex toward the damming stopper The device is equipped with a predetermined number of separation levers, each formed in the shape of a right triangle with an inclined hypotenuse, and (e) as the separation lever moves upward, the apex of the separation lever enters between the leading rod and the following rod among the rods that are blocked by the damming stopper, and the hypotenuse lifts the leading rod, causing it to go over the damming stopper and send it to the stock section, thereby performing a separation operation, and (f) when the separation operation is performed, the unbundling conveyor is driven in the upstream direction for a predetermined period of time from a predetermined time when the upward movement of the separation lever begins.

[0008] Third Invention The gist of it is the first invention or the second inventionIn this case, the dam stopper is made of a material that is elastic and has a higher coefficient of friction than metal materials.

[0009] Fourth Invention The gist of this invention is that, in the first invention, when the separation operation is performed, the unbundling conveyor is driven in the upstream direction for a predetermined period of time starting from a predetermined point in time when the upward movement of the separation lever begins.

[0010] Fifth Invention The gist of it is the first invention or the second invention In this process, the next separation operation is performed only after the rod material that has been sent to the stock section has run out. [Effects of the Invention]

[0011] According to the rod material separation device of the first invention, a damming stopper that dams the rod materials being conveyed by the unbundling conveyor, and a cross section in the conveying direction that is formed in the shape of a right triangle having a slanted side that slopes from the apex toward the damming stopper. The slanted portion extends beyond the damming stopper in the conveying direction. The device is equipped with a separation lever and a predetermined number of slanted edges. As the separation lever moves upward, the apex of the slanted edge enters between the leading rod and the following rods that are blocked by the damming stopper, and the slanted edge lifts the leading rod, causing it to move over the damming stopper and be sent to the stock section. As a result, the rods being transported by the unbundling conveyor are separated one by one along their entire length by the separation operation and are stably supplied to the stock section. Furthermore, according to the rod separation device of the second invention, a predetermined number of damming stoppers for blocking the rods being transported by the unbundling conveyor, and separation levers formed in the shape of a right triangle with a slanted side that slopes from the apex towards the damming stopper in the transport direction are provided. As the separation lever moves upward, the apex of the separation lever enters between the leading rod and the following rods that are blocked by the damming stopper, and the slanted side lifts the leading rod, allowing it to move over the damming stopper and be sent to the stock section. When the separation operation is performed, the unbundling conveyor is driven in the upstream direction for a predetermined period of time starting from a predetermined point in time when the separation lever starts moving upward. This prevents the alignment of the rods from being disrupted by contact between a subsequent rod and the separation lever, so that the rods are separated one by one and stably supplied to the stock section.

[0012] Third Invention According to the rod separation device, the damming stopper is made of a material that is elastic and has a higher coefficient of friction than metal materials. This suppresses the rotation of the rod when it is dammed by the damming stopper, and prevents separation failures caused by the rolling and slippage of the rod.

[0013] Fourth InventionAccording to the bar separating device, when the separating operation is performed, the uncoiling conveyor is driven in the upstream direction for a predetermined period from a predetermined time point accompanying the start of the upward movement of the separating lever. Thereby, since it is possible to prevent the alignment state of the bars from being disrupted due to the contact between the subsequent bar among the bars and the separating lever, the bars are separated one by one and stably supplied to the stock unit.

[0014] According to the bar separating device of the fifth invention, the next separating operation is performed after the bars sent out to the stock unit are used up. Thereby, the bars are stably supplied to the stock unit one by one.

Brief Description of the Drawings

[0015] [Figure 1] It is a front view for explaining a circular saw cutting machine according to an embodiment of the present invention. [Figure 2] It is a view showing an example of a bar to be cut by the circular saw cutting machine of FIG. 1. [Figure 3] It is a view for explaining a bar supply device arranged on the back side of the circular saw cutting machine of FIG. 1. [Figure 4] It is an enlarged view for explaining a main part of an alignment conveyor in the bar supply device of FIG. 3. [Figure 5] It is an enlarged view for explaining the operation of a transfer device in the bar supply device of FIG. 3. [Figure 6] It is an enlarged view for explaining a main part of a bar separating device in the bar supply device of FIG. 3. [Figure 7] It is a flowchart for explaining an example of the control operation of an electronic control device.

Modes for Carrying Out the Invention

[0016] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified, and the dimensional ratios, shapes, etc. of each part are not necessarily drawn accurately.

Embodiment

[0017] Figure 1 is a front view illustrating a circular saw cutting machine 10, which is one embodiment of the present invention, for simultaneously cutting a predetermined number N rods BL (in this embodiment, N = 4). In Figure 1, the circular saw cutting machine 10 is equipped with a circular saw drive device 14 that is rotatable around a horizontal first axis C1 on a base 12. The circular saw drive device 14 is equipped with a rotating frame (not shown) that is rotatable around the first axis C1, an electric motor (not shown) fixed to the rotating frame, a disc-shaped circular saw 20 supported by the rotating frame so as to be rotatable around a second axis C2 parallel to the first axis C1 and rotationally driven by the electric motor, and an electric actuator (not shown) provided on the base 12 that rotates the rotating frame (not shown) around the first axis C1 and repeatedly reciprocates the circular saw 20 to the position shown in Figure 1.

[0018] The circular saw 20 is covered by an openable and closable cover 24, which has a notch 22 to avoid interference with the bar material BL.

[0019] A clamping device 30 is provided on the base 12 to hold and fix a predetermined number N (=4) of rod members BL into which the circular saw 20 of the circular saw drive device 14 will cut. The clamping device 30 includes a horizontal vise 32 that clamps the rod members BL near where the circular saw 20 will cut from the lateral direction, i.e., the horizontal direction, and a vertical vise 34 that clamps the rod members BL near where the circular saw 20 will cut from the vertical direction.

[0020] The vertical vise 34 has a work table 34a that is fixed in position and has a horizontal support surface FS that supports a predetermined number N (=4) of rods BL, and functions as a vertical fixing claw of the vertical vise 34, a vertical movable claw 34b that is provided so as to be able to move toward and away from the work table 34a, and a vertical vise hydraulic cylinder 34c that drives the vertical movable claw 34b toward the work table 34a in order to clamp the rods BL from the vertical direction.

[0021] The horizontal vise 32 includes a backing plate 32a fixed to the circular saw drive unit 14 side of the work table 34a, a lateral movable jaw 32b provided to be able to move closer to and further away from the backing plate 32a, and a horizontal vise hydraulic cylinder 32c that drives the lateral movable jaw 32b toward the backing plate 32a in order to clamp the bar material BL from the side. The lateral movable jaw 32b has a groove 32d formed therein to receive the circular saw 20 in order to avoid interference with the circular saw 20 during cutting operation.

[0022] The circular saw drive unit 14 includes a switching valve that controls the horizontal vise hydraulic cylinder 32c and the vertical vise hydraulic cylinder 34c, and is equipped with a hydraulic control circuit 36 ​​that controls the operation of the horizontal vise 32 and vertical vise 34 of the clamping device 30. The operation of the circular saw drive unit 14 is controlled by an electronic control device 90, which will be described later, including the hydraulic control circuit 36.

[0023] Behind the circular saw drive unit 14, there is a rod feeding device (not shown) that is movable along the longitudinal direction of the four rods BL in Figure 1. This device grips the four rods BL at a position greater than the cutting length from the tip of each rod, and feeds the four rods BL at predetermined lengths onto the flat support surface FS of the work table 34a of the vertical vise 34, from one end to the other. The four rods BL are supplied to the rod feeding device from the roller conveyor 46 of the rod supply device 44 (described later) in a parallel state, adjacent to each other. The roller conveyor 46 supplies the four rods BL to the circular saw cutting machine 10 in an adjacent and aligned state, and is arranged in the y-direction from back to front in Figure 1, that is, parallel to the first axis C1 and the second axis C2. The roller conveyor 46 corresponds to the "material supply conveyor" of the present invention.

[0024] Figure 2 shows an example of a bar reinforcement BL, where Figure 2(a) is a plan view of the bar reinforcement BL seen from above, and Figure 2(b) is a cross-sectional view of the bar reinforcement BL. The bar reinforcement BL is a deformed reinforcing bar having, for example, a length of 5 to 6 m and an average diameter of, for example, 10 mm (D10) to 19 mm (D19). As shown in Figures 2(a) and (b), for example, it does not have longitudinal ribs, but has spiral nodes 40 formed circumferentially at regular intervals along the longitudinal direction, and flat surfaces 42 formed by removing a portion of the circumferential direction of the nodes 40. The cross-section has an oval shape consisting of a pair of parallel sides and a pair of circular arcs connecting the pair of sides. In Figure 2(b), the length between the pair of sides in the cross-section is shown as the minor axis L1, and the length between the pair of circular arcs is shown as the major axis L2. The bar reinforcement BL in Figures 1, 3 to 6 are assumed to be the same as shown in Figure 2.

[0025] Figure 3 illustrates a bar material supply device 44 that supplies bar material BL to a circular saw cutting machine 10. The bar material supply device 44 comprises a roller conveyor 46, a first separation device 54, a second separation device 56, an alignment conveyor 70, and a transfer device 80. The first separation device 54, the second separation device 56, the alignment conveyor 70, and the transfer device 80 are each arranged a predetermined number of M units along the longitudinal direction (y-direction) of the roller conveyor 46 to support multiple points along the longitudinal direction of the bar material BL, and they send the bar material BL toward the roller conveyor 46 in the x-direction (direction intersecting the longitudinal direction of the bar material BL). The predetermined number M is determined in advance through design or experimentation to find a suitable value for the separation, alignment, and transfer of the bar material BL described later.

[0026] The first separation device 54 is equipped with a debunking table chain conveyor 50 which also functions as a debunking table. The debunking table chain conveyor 50 transports a large number of parallel rods BL that have been debunked on it in the x-direction, and separates them one by one, sending them to a stock section 52 which is inclined so that the downstream side in the x-direction is lower. The debunking table chain conveyor 50 corresponds to the "debunking conveyor" of the present invention, and the first separation device corresponds to the "rod separation device" of the present invention.

[0027] The second separation device 56 lifts the rod material BL that is stored in the stock section 52 and sends the rod material BL one by one to the alignment conveyor 70. The second separation device 56 includes a lifter 64 formed with a bar receiving portion 64a of a predetermined width for scooping up bar stocks BL on the stock portion 52 and an arc-shaped portion 64b passing through the outer end of the bar receiving portion 64a, and a lifter 64 that is reciprocated between an upward position and a downward position around the curvature centerline C3 of the arc-shaped portion 64b while the arc-shaped portion 64b is in sliding contact with the bar stocks BL supported by the stock portion 52 by a hydraulic cylinder 64c for the lifter, and a stopper member 68 fixed to the frame 66 in a position that prevents the bar stocks BL received by the bar receiving portion 64a from moving toward the curvature centerline C3, and an inclined stopper member 68 that moves away from the stock portion 52 as it rises so that the effective length of the bar receiving portion 64a that receives the bar stocks BL in the upward position of the lifter 64 shortens as the lifter 64 rises, so that only one bar stock BL is placed on it. The dashed line in Figure 3 shows the upward position of the lifter 64 and the bar stocks BL supported by it. The inclined support member 62 receives the rod BL scooped up by the lifter 64 and slides it onto the upstream end of the alignment conveyor 70. This sends the rods BL one by one onto the alignment conveyor 70. The operation of the hydraulic cylinder 64c for the lifter is controlled by the electronic control device 90, which will be described later.

[0028] Figure 4 is an enlarged view illustrating the main parts of the alignment conveyor 70. The alignment conveyor 70 includes an endless annular chain 72 that functions as a conveying member for transporting bar stocks BL, a drive motor 76 that continuously rotates one of a pair of sprockets 74 around which the chain 72 is wound, and a fixed-position stopper 78 fixed to the frame 66. In the alignment conveyor 70, bar stocks BL sent out from the second separation device 56 are continuously moved toward the stopper 78. As bar stocks BL arrive one after another and are prevented from moving by the stopper 78, the chain 72 is continuously driven to move the bar stocks BL toward the stopper 78. As a result, multiple bar stocks BL are rotated around their axes by the frictional force with the chain 72, as shown by the arc-shaped arrows in Figure 4. The operation of the drive motor 76 is controlled by an electronic control device 90, which will be described later.

[0029] On the alignment conveyor 70, if a portion of the longitudinal direction of one bar BL separate from the multiple bar BLs (three in Figure 5) blocked by the stopper 78 is positioned above the three bar BLs due to entanglement with them, the rotation of the three bar BLs around their axes moves the bar BL upstream of the alignment conveyor 70, causing it to fall onto the alignment conveyor 70. As the entanglement is released, the bar BL is automatically aligned with the three bar BLs. The aforementioned separate bar BL is moved from the position shown P1, via the position shown P2, to the position shown P3, so that the three bar BLs and the separate bar BL are aligned in a parallel state adjacent to each other. If the bar BLs are deformed reinforcing bars with an oval cross-section as shown in Figure 2, when they are aligned adjacent to each other by the alignment conveyor 70, the four bar BLs will have their flat surfaces 42 as their bottom surfaces and be aligned to a height L1.

[0030] When the number of rods BL held in place by the stopper 78 on the alignment conveyor 70 reaches a predetermined number N (=4), and these rods BL are aligned horizontally and in a parallel state adjacent to each other, and a space for placing the rods BL is formed on the roller conveyor 46, the transfer device 80 transfers these four rods BL onto the roller conveyor 46 while they remain aligned horizontally and in a parallel state adjacent to each other. The transfer device 80 includes a collective support section 82 and a transfer drive mechanism 84.

[0031] The collective support section 82 has a concave cross-section in the transfer direction, and is formed to be able to collectively support a predetermined number N (=4) of rod members BL that are adjacent to each other and aligned horizontally in the concave bottomed section 82a.

[0032] The transfer drive mechanism 84 comprises two parallel links 88a rotatably mounted on the frame 66 and rotationally driven by a drive motor 86, and a horizontal link 88b that supports a central support section 82 and is rotatably connected to the upper ends of the parallel links 88a. As the parallel links 88a are rotated by the drive motor 86, the horizontal link 88b (and the central support section 82) are rotated counterclockwise along a circular trajectory between the alignment conveyor 70 and the roller conveyor 46 while maintaining a horizontal position. The operation of the drive motor 86 is controlled by an electronic control device 90, which will be described later.

[0033] Figure 5 is an enlarged view illustrating the operation of the central support unit 82. As the parallel link 88a rotates, the central support unit 82 rotates along a circular trajectory intersecting the longitudinal direction of the roller conveyor 46, while holding the bottomed portion 82a horizontally, as shown in Figure 5, thereby transferring the four rod members BL from the alignment conveyor 70 onto the roller conveyor 46.

[0034] Figure 6 is an enlarged view illustrating the main parts of the first separation device 54. The first separation device 54 includes a damming stopper 58 and a separation lever 60. The damming stopper 58 is a position-fixing member that dams the rod material BL that is placed on and moves on the unbundling table chain conveyor 50 driven by a drive motor 50a. The separation lever 60 is plate-shaped and is formed in the shape of a right triangle with a cross section in the transport direction having a hypotenuse 60c that slopes from the apex 60b toward the damming stopper 58. The separation lever 60 is also provided by a drive cylinder 60a so as to be movable in the vertical direction between an upper limit position UP and a lower limit position LP. In Figure 6, the upper limit position UP and the lower limit position LP of the separation lever 60 are shown by dashed lines. As the separation lever 60 moves upward, the apex portion 60b enters between the leading rod BL and the following rod BL that are blocked by the damming stopper 58, and the slanted side portion 60c lifts only the leading rod BL, allowing it to overcome the damming stopper 58 and be sent to the stock portion 52, performing a separation operation SPBL. This separates the rods BL one by one. The operation of the drive motor 50a and drive cylinder 60a is controlled by the electronic control device 90, which will be described later.

[0035] In conventional bar material supply devices, the separation operation SPBL was not performed. Instead, the bar materials BL were allowed to fall by their own weight from the unbundling table chain conveyor 50 to the stock section 52, and the multiple bar materials BL accumulated in the stock section 52 were separated one by one by the second separation device 56. However, when the bar materials BL fell by their own weight to the stock section 52, due to the low elasticity of the material, the entire length of the bar material BL would not follow the fall, and only a portion of its length would fall. When such an event occurred, manual intervention was required to allow the entire length of the bar material BL to fall into the stock section 52, which presented challenges to the functionality and safety of the automated machine. In this embodiment, the separation operation SPBL is performed by the first separation device 54, so that the bar materials BL are separated one by one along their entire length and stably supplied to the stock section 52.

[0036] Preferably, the damming stopper 58 is made of a material that is elastic and has a higher coefficient of friction than metal materials, such as rubber. This suppresses the rotation of the rod BL when it is dammed by the damming stopper 58, and prevents separation failures caused by rolling displacement of the rod BL.

[0037] Returning to Figure 1, the electronic control unit 90 is composed of a so-called microcomputer and controls the cutting operation by the circular saw cutting machine 10 and the bar material supply operation by the bar material supply device 44. The electronic control unit 90 functionally includes a first separation control unit 92, a second separation control unit 94, a transfer control unit 96, a cutting control unit 98, and the like.

[0038] The first separation control unit 92 transports the unbundled rods BL on the unbundling table chain conveyor 50 in the x direction and controls the first separation device 54 to perform the separation operation SPBL, separating the rods BL one by one and sending them to the stock unit 52.

[0039] The second separation control unit 94 controls the second separation device 56 to send the rod material BL sent to the stock unit 52 to the alignment conveyor 70.

[0040] When the transfer control unit 96 determines that a predetermined amount of time has elapsed since the four rod members BL that were blocked by the stopper 78 on the alignment conveyor 70 have reached each other and that the rod members BL are now aligned horizontally in a parallel state adjacent to each other, and when a sensor (not shown) detects that space has been created on the roller conveyor 46 to transfer the four rod members BL, it controls the transfer device 80 to transfer the four rod members BL from the alignment conveyor 70 onto the roller conveyor 46.

[0041] The cutting control unit 98 pulls out a predetermined number N (=4) of rods BL on the roller conveyor 46 from their ends using a belt conveyor (not shown) until they abut against a positioning stopper (not shown), and then, with the rods gripped by the clamping device 30, it cuts them by reciprocating the circular saw 20.

[0042] Figure 7 is a flowchart illustrating an example of the control operation of the separation operation SPBL performed by the first separation control unit 92 functionally provided by the electronic control unit 90. This flowchart is executed repeatedly, for example.

[0043] First, in step S10 (the steps will be omitted hereafter), it is determined whether or not there are bar materials BL on the unbundling table chain conveyor 50, for example, from a detection signal from a sensor (not shown). If this determination is negative, the determination in S10 is repeated.

[0044] If the determination in S10 is affirmative, in S20 the drive of the unbundling table chain conveyor 50 in the x direction is started, and then in S30, it is determined whether or not the bar material BL is blocked by the damming stopper 58, for example, from a detection signal of a sensor not shown. If this determination is negative, the determination in S30 is repeated.

[0045] If the determination in S30 is affirmative, the drive of the unbundling table chain conveyor 50 is stopped in S40. Then, in S50, it is determined, for example, from a detection signal from a sensor (not shown) whether or not there are any bar stocks BL in the stock section 52, that is, whether or not the bar stocks BL previously sent to the stock section have run out. If this determination is negative, the determination in S50 is repeated. After S50 is performed, the next separation operation SPBL is performed only after the bar stocks BL sent to the stock section 52 have run out, and bar stocks BL are supplied to the stock section 52 one by one in a stable manner.

[0046] If the determination in S50 is affirmative, the separation operation SPBL is performed from S60 to S90. First, in S60, the separation lever 60 is moved upward. Next, in S70, the unbundling platform chain conveyor 50 is driven in the upstream direction (opposite direction to the x direction) for a predetermined period T from a predetermined time t0 when the upward movement of the separation lever 60 begins. The predetermined time t0 is predetermined by design or experiment to determine a suitable timing so that the drive of the unbundling platform chain conveyor 50 toward the upstream direction begins from the point when, for example, the top portion 60b of the separation lever 60 enters between the leading rod BL and the subsequent rod BL of the rod BL that are blocked by the damming stopper 58. The predetermined period T is predetermined by design or experiment to determine a suitable value so that contact between the separation lever 60 and the subsequent rod BL is avoided when the separation lever 60 moves upward. The execution of S70 prevents the alignment of the rods BL from being disrupted by contact between the subsequent rods BL and the separation lever 60, thereby ensuring that the rods BL are separated one by one and stably supplied to the stock section 52. Furthermore, S70 is not necessarily performed; if S70 is not performed, S80 is performed after S60.

[0047] Next, in S80, it is determined whether the separation lever 60 has reached the upper limit position UP. If this determination is negative, the determination in S80 is repeated. If the determination in S80 is positive, in S90 the separation lever 60 is moved to the lower limit position LP, and this routine is terminated.

[0048] As described above, the first separation device 54 of this embodiment is equipped with a predetermined number M of damming stoppers 58 that block the rods BL being transported by the unbundling table chain conveyor 50, and separation levers 60 that are formed in the shape of a right triangle with a slanted side 60c that slopes from the apex 60b toward the damming stopper 58 in the transport direction. As the separation lever 60 moves upward, the apex 60b enters between the leading rod BL and the following rod BL that are blocked by the damming stopper 58, and the slanted side 60c lifts the leading rod BL, allowing it to move over the damming stopper 58 and be sent to the stock section 52, performing a separation operation SPBL. As a result, the rods BL being transported by the unbundling table chain conveyor 50 are separated one by one along their entire length by the separation operation SPBL and are stably supplied to the stock section 52.

[0049] Furthermore, according to the first separation device 54 of this embodiment, the damming stopper 58 is made of a material that is elastic and has a higher coefficient of friction than metal materials. This suppresses the rotation of the rod material BL when it is dammed by the damming stopper 58, and prevents separation failures caused by the rolling displacement of the rod material BL.

[0050] Furthermore, according to the first separation device 54 of this embodiment, when the separation operation SPBL is performed, the unbundling table chain conveyor 50 is driven in the upstream direction (opposite direction to the x direction) for a predetermined period T from a predetermined time t0 when the separation lever 60 starts moving upward. This prevents the alignment of the bar materials BL from being disrupted by contact between the subsequent bar materials BL and the separation lever 60, so that the bar materials BL are separated one by one and stably supplied to the stock section 52.

[0051] Furthermore, according to the first separation device 54 of this embodiment, the next separation operation SPBL is performed only after the rod material BL sent to the stock section 52 has run out. This ensures that rod material BL is supplied to the stock section 52 one at a time in a stable manner.

[0052] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the present invention is not limited to this embodiment and can be implemented in other forms.

[0053] For example, the above-described embodiment described a case where the bar material BL is a deformed reinforcing bar, but it may also be a rod-shaped steel material. Even with rod-shaped steel materials, there is variation in the cross-sectional shape, so similar problems arise.

[0054] Furthermore, although the predetermined number N of rod materials BL in the above-described embodiment was 4, the present invention is not necessarily limited to 4, and can be applied even with just 1 rod.

[0055] It should be noted that the above is merely one embodiment, and although other examples are not provided, the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art, without departing from its spirit. [Explanation of Symbols]

[0056] 10: Circular saw cutting machine 44: Bar material feeding device 46: Roller conveyor (material feed conveyor) 50: Unbundling platform chain conveyor (unbundling conveyor) 52: Stock Section 54: 1st separation device (bar separation device) 58: Dam stopper 60: Separation lever 60b: Vertex 60c: hypotenuse BL: Bar material M: Predetermined number N: Predetermined number SPBL: Separation Operation T: Predetermined period t0: predetermined time

Claims

1. In a rod supply device for a circular saw cutting machine that cuts a predetermined number of rods simultaneously, the rod supply device supplies a predetermined number of the rods from a material supply conveyor in an adjacent and aligned state, wherein the unbundled, parallel, and numerous rods are transported by an unbundling conveyor in a transport direction intersecting the longitudinal direction of the rods, and each rod is separated and sent to a predetermined stock section, A damming stopper that blocks the rod material being transported by the unbundling conveyor, The cross-section in the transport direction is formed in the shape of a right triangle having a slanted side that slopes from the apex toward the damming stopper, and the slanted side is provided with a predetermined number of separation levers that extend beyond the damming stopper in the transport direction. As the separation lever moves upward, the apex portion enters between the leading rod and the following rod among the rods that are blocked by the damming stopper, and the slanted portion lifts the leading rod, causing it to move over the damming stopper and be sent to the stock section, thus performing a separation operation. A rod material separation device characterized by the following features.

2. A rod supply device for a circular saw cutting machine that cuts a predetermined number of rods simultaneously, wherein a predetermined number of the rods are supplied from a material supply conveyor in an adjacent and aligned state, the rod separation device transports a large number of unbundled, parallel rods in a transport direction intersecting the longitudinal direction of the rods by an unbundling conveyor, separates them one by one, and sends them to a predetermined stock section, A damming stopper that blocks the rod material being transported by the unbundling conveyor, The system is equipped with a predetermined number of separation levers, each having a cross-section in the transport direction that is formed in the shape of a right triangle with a slanted side that slopes from the apex towards the damming stopper. As the separation lever moves upward, the apex portion enters between the leading rod and the subsequent rods of the rods that are blocked by the damming stopper, and the slanted portion lifts the leading rod, causing it to move over the damming stopper and be sent to the stock section, thus performing a separation operation. When performing the separation operation, the unbundling conveyor is driven in the upstream direction for a predetermined period of time starting from a predetermined point in time when the separation lever begins to move upward. A rod material separation device characterized by the following features.

3. The aforementioned damming stopper is made of a material that is elastic and has a higher coefficient of friction than metal materials. A rod material separating device according to feature 1 or 2.

4. When performing the separation operation, the unbundling conveyor is driven in the upstream direction for a predetermined period of time starting from a predetermined point in time when the separation lever begins to move upward. A rod material separation device according to feature 1.

5. The next separation operation is performed after the rod material that has been fed to the stock section has run out. A rod material separating device according to feature 1 or 2.

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