Bar feeder for circular saw cutting machine

Abstract

To provide a bar material supplying device for a circular saw cutting machine capable of automatically supplying a predetermined number of bars to the circular saw cutting machine in a state where the bars are aligned adjacent to each other. [Solution] The aligning conveyor 70 continuously moves the reinforcing bars BL cut out from the bar cutting device 48 toward the abutment stopper 75, and when the reinforcing bars BL abutting against the abutment stopper 75 are rotated about their axes, if a part of a reinforcing bar BL other than the multiple reinforcing bars BL blocked by the abutment stopper 75 is positioned above the multiple reinforcing bars BL due to their mutual entanglement, it is moved upstream of the aligning conveyor 70 by the rotation of the multiple reinforcing bars BL about their axes and falls onto the aligning conveyor 70, where it is aligned with the multiple reinforcing bars BL. This provides a bar supply device 44 that automatically supplies a predetermined number of reinforcing bars BL to the circular saw cutting machine 10 in a state where they are aligned adjacent to each other.

Description

[Technical Field]

[0001] The present invention relates to a bar feeder for a circular saw cutting machine, which feeds a predetermined number of bars to be cut simultaneously to the circular saw cutting machine in a state where the bars are aligned adjacent to each other. [Background technology]

[0002] When repeatedly and continuously cutting long rods such as rebar, steel bars, and wire rods to desired lengths with a circular saw, it is desirable to supply multiple rods to the circular saw while they are horizontally aligned and adjacent to one another. In this case, the smaller the diameter of the rod, the lower its rigidity. Therefore, if the clamping device of the circular saw cutter clamps multiple rods that are tangled or overlapping, the rods will not be held securely, causing them to move during cutting, resulting in damage to the circular saw and reduced cutting accuracy.

[0003] Small-diameter rods, for example, have a diameter of about 10 mm and a length of about 5 to 6 m. Approximately 100 rods are brought in bound with cable ties. When they are unbound on the unbinding table of the bar feeder, the rods often become tangled because they have low rigidity and are flexible. When cutting rods with a circular saw, it is desirable to automatically remove the required number of rods from the tangled rods and arrange them side by side.

[0004] Patent Document 1 proposes a reinforcing bar conveying system in which a plurality of push-up devices are provided at a plurality of locations in the longitudinal direction of the reinforcing bars at the rear end of a conveying device that conveys a large number of reinforcing bars that are entangled with each other, and the push-up devices intermittently push up some of the reinforcing bars being conveyed on the conveying device. According to this system, by intermittently pushing up some of the reinforcing bars with the push-up devices, the reinforcing bars can be conveyed while untangling and separating them, and the conveying by the lift-up conveying device at the downstream stage can be carried out smoothly. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-159330 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the reinforcing bar conveying equipment described in Patent Document 1 does not have the function of selecting a certain number of bars from a large number of bars, untangling the bars, and automatically supplying them in a parallel state, making it difficult to supply multiple bars to a circular saw cutting machine in an adjacent, aligned state.

[0007] The present invention has been made in light of the above circumstances, and its object is to provide a bar feeder for a circular saw cutting machine that can automatically feed a plurality of bars to the circular saw cutting machine in a state where the bars are aligned adjacent to each other.

[0008] The inventors conducted extensive research in light of the above circumstances and found that when multiple bars are conveyed on an aligning conveyor toward a fixed abutment member, the bars on the aligning conveyor, prevented from moving by the abutment member, are rotated about their axis due to friction with the endless, annular conveying member of the aligning conveyor. If a longitudinal portion of one of the multiple bars is positioned above another of the multiple bars due to entanglement, the longitudinal portion of that bar is moved upstream of the aligning conveyor by the influence of the rotation of the other bar rotating about its axis and falls adjacent to the upstream side of the other bar. This action automatically resolves entanglement of a bar with a longitudinal portion positioned above another of the multiple bars. The present invention is based on this finding. [Means for solving the problem]

[0009] That is, the gist of the first invention is (a) a bar supply device for a circular saw cutting machine that simultaneously cuts a predetermined number of bar materials into a predetermined length by rotating a circular saw into a predetermined number of bar materials aligned adjacent to each other and clamped by a clamping device, and supplies the predetermined number of bar materials aligned adjacent to each other from a material supply conveyor, (b) a bar cutting device that cuts the plurality of bar materials unbundled on an unbundling table one by one, and (c) an endless circular chain that is continuously rotated by an electric motor; Stopper and, the bar material cut out from the bar material cutting device On the chain By continuously moving the rod toward the stopper, the rod abutting against the stopper is The friction with the chain (d) a transfer device that transfers the predetermined number of bars onto the material supply conveyor when the predetermined number of bars held back by the stoppers on the aligning conveyor are aligned adjacent to each other in a parallel state. (e) when a longitudinal portion of a bar other than the plurality of bars blocked by the stopper on the chain is positioned above the plurality of bars blocked due to the entanglement of the bars, the aligning conveyor moves the longitudinal portion of the other bar to the upstream side of the aligning conveyor by rotating the plurality of bars about their axes and drops it onto the aligning conveyor, thereby eliminating the entanglement and automatically aligning it with the plurality of bars. The reason is that.

[0010] The gist of the second invention is that in the first invention, the rods are deformed reinforcing bars having an oval cross section consisting of a pair of parallel sides and a pair of arcs connecting the pair of sides, and the alignment conveyor aligns the specified number of rods so that they are adjacent to each other in a parallel state at the same height.

[0011] The gist of the third invention is that in the first invention, the bar cutting device cuts out and sends out one bar at a time from the large number of bar materials unbundled on the unbundling table, and the transfer device transfers the predetermined number of bar materials onto the supply conveyor when the number of bar materials held back by the abutment stopper on the aligning conveyor reaches the predetermined number.

[0012] The gist of the fourth invention is that in the first invention, the bar material extruding device includes a first extruding device that sequentially extrudes one bar at a time from the multiple bars unbundled on the unbundling table and sends the bar material onto an inclined support member that is inclined so that the downstream side in a conveying direction that intersects with the longitudinal direction of the bar material is lower, and a second extruding device that lifts the foremost bar material among the bar materials supported on the inclined support member and slides it onto the upstream end of the aligning conveyor.

[0013] The gist of the fifth invention is as follows: (a) A bar supply device for a circular saw cutting machine, which simultaneously cuts a predetermined number of bar materials into a predetermined length by rotating a circular saw into a predetermined number of bar materials clamped by a clamping device and aligned adjacent to each other in a parallel state, supplies the predetermined number of bar materials aligned adjacent to each other from a material supply conveyor, (b) a bar cutting device which cuts out one bar material at a time from a large number of bar materials unbundled on an unbundling table, and (c) a stopper which attempts to continuously move the bar materials cut out from the bar cutting device towards the stopper, thereby rotating the bar materials abutting against the stopper. (d) a transfer device that transfers the predetermined number of bar materials onto the material supply conveyor when the predetermined number of bar materials blocked by the abutment stoppers on the aligning conveyor are aligned adjacent to one another in a parallel state; (e) the bar material cutting device includes a first cutting device that cuts out one bar material at a time from the large number of bar materials unbundled on the unbundling table and sends the bar materials onto an inclined support member that is inclined so that the downstream side in the conveying direction that intersects with the longitudinal direction of the bar materials is lower; and a second cutting device that lifts the bar material located at the forefront of the bar materials supported on the inclined support member and slides it onto the upstream end of the aligning conveyor; (f) The first extruding device comprises a blocking stopper that blocks the bar material flowing from the unbundling table, and upper and lower extruding levers that, as the bar material moves upward, cut into the gap between the leading bar material and the succeeding bar material blocked by the blocking stopper, lifting the leading bar material and causing it to climb over the blocking stopper and drop onto the upstream end of the inclined support member.

[0014] The gist of the sixth invention is that, in the fourth invention, the second extruding device includes a lifter formed with a bar stock receiving portion of a predetermined width for scooping up the bar stock on the inclined support member and an arc-shaped portion passing through the outer end of the bar stock receiving portion, the arc-shaped portion being in sliding contact with the bar stock supported by the inclined support member and being able to rotate back and forth between an elevated position and a lowered position around the center line of curvature of the arc-shaped portion with the arc-shaped portion in sliding contact with the bar stock supported by the inclined support member, and a stopper member fixed in a position that prevents the bar stock received in the bar stock receiving portion from moving toward the center line of curvature, the stopper member being inclined so that the higher it becomes, the further it moves away from the inclined support member so that the effective length of the bar stock receiving portion that receives the bar stock in the elevated position of the lifter becomes shorter as the lifter rises and only one bar stock is placed on it. [Effects of the Invention]

[0015] According to the bar material supply device for a circular saw cutting machine of the first invention, the bar material cut out from the bar material cutting device is conveyed by the aligning conveyor. On the chain When the bar is moved continuously towards the stopper, the bar that is in contact with the stopper Due to friction with the chainRotated around an axis R, If a bar other than the multiple bar stock blocked by the stopper is entangled and positioned above the multiple bar stock, the rotation of the multiple bar stock around its axis causes the bar stock to move upstream of the aligning conveyor and drop onto the aligning conveyor, aligning it with the multiple bar stock. As a result, the new bar stock becomes adjacent to the multiple bar stock and aligned in parallel, and is transferred in this parallel state to the material supply conveyor by the transfer device. This provides a bar supply device for a circular saw cutting machine that automatically supplies a predetermined number of bar stock aligned adjacent to each other to the circular saw cutting machine.

[0016] According to the bar supply device for a circular saw cutter of the second invention, the bars are deformed reinforcing bars with an oval cross section consisting of a pair of parallel sides and a pair of arcs connecting the pair of sides, and the aligning conveyor aligns a predetermined number of bars so that they are adjacent to each other in a parallel state at the same height. As a result, the predetermined number of bars are transferred onto the bar supply conveyor by the transfer device in an adjacent to each other in a parallel state at the same height.

[0017] According to the bar supply device for a circular saw cutter of the third invention, the bar cutting device cuts out one bar at a time from a large number of bars unbundled on the unbundling table, and the transfer device transfers the predetermined number of bars onto the material supply conveyor when the number of bars held back by the stoppers on the aligning conveyor reaches a predetermined number. This allows stable operation, allowing the cut-out bars to be aligned one by one on the aligning conveyor, and when the number of bars held back by the stoppers reaches a predetermined number, the transfer device transfers the bars onto the material supply conveyor.

[0018] According to the bar feeder for a circular saw cutter of the fourth invention, the bar extruding device includes a first extruding device that sequentially extrudes one bar at a time from a large number of bars unbundled on a unbundling table and sends the bar out onto an inclined support member that is inclined so that the downstream side in the conveying direction intersecting with the longitudinal direction of the bar is lower, and a second extruding device that lifts the foremost bar among the bars supported on the inclined support member and slides it onto the upstream end of the aligning conveyor. This allows for stable aligning on the aligning conveyor by the extruding operation of the first and second extruding devices one bar at a time.

[0019] According to the bar feeder for a circular saw cutting machine of the fifth invention, (a) When the aligning conveyor continuously moves the bars cut from the bar cutting device toward the abutment stopper, the bar abutting the abutment stopper is rotated about its axis. If a bar other than the multiple bar materials blocked by the abutment stopper is entangled and positioned above the multiple bar materials, the rotation of the multiple bar materials about its axis causes the other bar material to move upstream of the aligning conveyor and fall onto the aligning conveyor, aligning it with the multiple bar materials. As a result, the other bar material is aligned adjacent to the multiple bar materials, and is transferred in that parallel state to the material feed conveyor by the transfer device. This provides a bar feeder for a circular saw cutting machine that automatically feeds a predetermined number of bar materials aligned adjacent to each other to the circular saw cutting machine. (b) The bar extruding device includes a first extruding device that sequentially extrudes one bar at a time from a large number of bars unbundled on the unbundling table and sends them onto an inclined support member that is inclined so that the downstream side in the conveying direction that intersects with the longitudinal direction of the bar is lower, and a second extruding device that lifts the leading bar among the bars supported on the inclined support member and slides it onto the upstream end of the aligning conveyor. This allows the first and second extruding devices to extrude one bar at a time, thereby achieving stable aligning operation on the aligning conveyor. (c) The first feeding device is equipped with a stopper that blocks the bars flowing from the unbundling table, and an upper and lower feeding lever that, as it moves upward, cuts into the gap between the leading bar blocked by the stopper and the following bar, lifting the leading bar and causing it to climb over the stopper and drop onto the upstream end of the inclined support member. This allows the bars to be fed one by one with a small and simple structure.

[0020] According to a sixth aspect of the present invention, the second extruding device includes a lifter having a bar receiving portion of a predetermined width for scooping up a bar on an inclined support member and an arc-shaped portion passing through the outer end of the bar receiving portion, the lifter being rotatable between an elevated position and a lowered position about the center line of curvature of the arc-shaped portion with the arc-shaped portion in sliding contact with the bar supported by the inclined support member, and a stopper member fixed in a position that prevents the bar received in the bar receiving portion from moving toward the center line of curvature, the stopper member being inclined so that the effective length of the bar receiving portion that receives the bar in the elevated position of the lifter becomes shorter as the lifter rises, allowing only one bar to be placed on the stopper member. This allows the bars to be reliably extruded one by one and sent onto the aligning conveyor. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front view illustrating a circular saw cutting machine according to an embodiment of the present invention; [Figure 2]2 is a diagram showing an example of a bar material cut by the circular saw cutting machine of FIG. 1. FIG. [Figure 3] 2 is a diagram illustrating a bar material supplying device disposed behind the circular saw cutting machine of FIG. 1. FIG. [Figure 4] 4 is an enlarged view illustrating a main part of a bar cutting device of the bar feeder of FIG. 3. FIG. [Figure 5] 4 is an enlarged view illustrating a main part of an aligning conveyor of the bar feeder of FIG. 3. FIG. [Figure 6] 4 is an enlarged view for explaining the operation of a transfer device of the bar feeder of FIG. 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the present invention will be described in detail below with reference to the drawings. Note that in the following embodiment, the drawings are appropriately simplified, and the dimensional ratios and shapes of the various parts are not necessarily drawn accurately. [Example]

[0023] 1, a circular saw cutting machine 10 includes a circular saw drive device 14 rotatably mounted on a base 12 about a horizontal first axis C1. The circular saw drive device 14 includes a rotating frame (not shown) rotatably mounted about the first axis C1, an electric motor (not shown) fixed to the rotating frame, a disk-shaped circular saw 20 supported by the rotating frame so as to be rotatable about a second axis C2 parallel to the first axis C1 and driven to rotate by the electric motor, and an electric actuator (not shown) mounted on the base 12 that rotates the rotating frame (not shown) about the first axis C1 and repeatedly reciprocates the circular saw 20 to the position shown in FIG.

[0024] The circular saw 20 is covered by an openable cover 24 having a notch 22 for avoiding interference with a bar material such as a reinforcing bar BL, which will be described later.

[0025] A clamping device 30 is provided on the base 12 to clamp and secure a predetermined number (four in this embodiment) of reinforcing bars BL into which the circular saw 20 of the circular saw driving device 14 will cut. The clamping device 30 includes a horizontal vice 32 that clamps the reinforcing bars BL in the vicinity of the area into which the circular saw 20 will cut from the lateral direction, i.e., horizontally, and a vertical vice 34 that clamps the reinforcing bars BL in the vicinity of the area into which the circular saw 20 will cut from the vertical direction.

[0026] The vertical vise 34 is fixed in position and has a horizontal support surface FS that supports a predetermined number of reinforcing bars BL, for example, four reinforcing bars.The vertical vise 34 has a work table 34a that functions as a vertical fixed claw of the vertical vise 34, a vertical movable claw 34b that is arranged so that it can move towards and away from the work table 34a, and a vertical vise hydraulic cylinder 34c that drives the vertical movable claw 34b towards the work table 34a to clamp the reinforcing bars BL from the vertical direction.

[0027] A bar feeder (not shown) is provided behind the circular saw drive unit 14, movably arranged along the longitudinal direction of the four reinforcing bars BL shown in FIG. 1. The bar feeder grasps the four reinforcing bars BL at a position spaced apart from their tips by at least the cutting length and feeds the four reinforcing bars BL at preset lengths from one end onto a flat support surface FS of the work table 34a of the vertical vise 34. The four reinforcing bars BL are supplied to the bar feeder in a parallel, adjacent state from a roller conveyor 46 of a bar supply unit 44 (described below). The roller conveyor 46 functions as a material supply conveyor that supplies the four reinforcing bars BL to the circular saw cutting machine 10 in a parallel, adjacent state, and is oriented in the y direction from the back to the front of FIG. 1, i.e., parallel to the first axis C1 and the second axis C2.

[0028] The horizontal vise 32 has a backing plate 32a fixed to the work table 34a on the side of the circular saw driving device 14, laterally movable claws 32b provided so as to be able to move towards and away from the backing plate 32a, and a horizontal vise hydraulic cylinder 32c that drives the laterally movable claws 32b towards the backing plate 32a to clamp the reinforcing bar BL from the side. A groove 32d is formed in the laterally movable claws 32b to receive the circular saw 20 in order to avoid interference with the circular saw 20 during cutting operation.

[0029] The circular saw cutting machine 10 includes a hydraulic control circuit 40 that includes a switching valve for controlling the horizontal vice hydraulic cylinder 32c and the vertical vice hydraulic cylinder 34c, and controls the operation of the horizontal vice 32 and the vertical vice 34 of the clamping device 30. The horizontal vice hydraulic cylinder 32c and the vertical vice hydraulic cylinder 34c are switched by commands from an electronic control device 80.

[0030] The reinforcing bars BL have a length of, for example, 5 to 6 m and an average diameter of, for example, 6 mm (D6) to 19 mm (D19). The deformed reinforcing bars, as shown in FIG. 2(a), have no longitudinal ribs but have spiral nodes 92 formed circumferentially at regular intervals in the longitudinal direction and flat surfaces 94 formed by removing portions of the nodes 92 in the circumferential direction. This deformed reinforcing bar has an oval cross section consisting of a pair of parallel sides and a pair of circular arcs connecting the pair of sides. The reinforcing bars BL in FIGS. 1 and 3 to 6 are assumed to be those shown in FIG. 2(a). However, deformed reinforcing bars of other shapes, such as those shown in FIG. 2(b) that do not have flat surfaces 94 but have longitudinal ribs 96, may also be used.

[0031] 3, the bar supply device 44 has a roller conveyor 46, a bar cutting device 48, an alignment conveyor 70, and a transfer device 76. The bar cutting devices 48, the alignment conveyor 70, and the transfer device 76 are each arranged in plurality along the longitudinal direction (y direction) of the roller conveyor 46 so as to support the reinforcing bars BL at multiple points in the longitudinal direction, and feed the reinforcing bars BL toward the roller conveyor 46 in the x direction.

[0032] The bar cutting device 48 is equipped with an unbinding table chain conveyor 50, and by unbinding a large number of reinforcing bars BL, for example 100 reinforcing bars BL, which are bound together using cable ties, the reinforcing bars BL are preferably cut out one by one in sequence from the group of many unbound reinforcing bars BL and sent to the subsequent alignment conveyor 70.

[0033] The bar cutting device 48 is equipped with a first cutting device 54 that sequentially cuts out one by one of a large number of reinforcing bars BL that have been unbundled on an unbundling table chain conveyor 50, which also functions as an unbundling table, and sends them onto an inclined support member 52 that is inclined so that the downstream side in the conveying direction perpendicular to the longitudinal direction of the reinforcing bars BL is lower, and a second cutting device 56 that lifts the reinforcing bar BL located at the top of the reinforcing bars BL supported on the inclined support member 52 and slides it onto the upstream end of the alignment conveyor 70.

[0034] 4, the first extruding device 54 includes a fixed-position stopper 58 that stops the reinforcing bars BL placed on and moving on the unbundling table chain conveyor 50 driven by a drive motor 50a, and an up-and-down extruding lever 60 that is movable in the vertical direction and that, as driven upward by a drive cylinder 60a, cuts into the gap between the leading reinforcing bar BL and the following reinforcing bars BL among the reinforcing bars BL stopped by the stopper 58, lifts only the leading reinforcing bar BL, causes it to climb over the stopper 58, and drops it onto the upstream end of the inclined support member 52 described below. The up-and-down extruding lever 60 is plate-shaped and has a vertical side 60b and an oblique side 60d that slopes from a vertex 60c toward the stopper 58, and is driven upward until the oblique side 60d exceeds the stopper 58.

[0035] The second cutting device 56 is formed with a bar receiving portion 64a of a predetermined width for scooping up the reinforcing bar BL on the inclined support member 52 and an arc-shaped portion 64b passing through the outer end of the bar receiving portion 64a, and is equipped with a lifter 64 that is rotated back and forth between an elevated position and a lowered position around the center line of curvature C3 of the arc-shaped portion 64b by a lifter hydraulic cylinder 64c, with the arc-shaped portion 64b in sliding contact with the reinforcing bar BL supported by the inclined support member 52, and a stopper member 68 that is fixed to the frame 66 so as to be in a position that prevents the reinforcing bar BL received by the bar receiving portion 64a from moving toward the center line of curvature C3, and is inclined so that the effective length of the bar receiving portion 64a that receives the reinforcing bar BL in the elevated position of the lifter 64 becomes shorter as the lifter 64 is raised, so that only one reinforcing bar BL is placed on it. 3 indicates the lifted position of the lifter 64 and the reinforcing bars BL supported by it. The inclined support member 62 receives the reinforcing bars BL scooped up by the lifter 64 and slides them onto the upstream end of the alignment conveyor 70.

[0036] As shown in detail in Fig. 5, the aligning conveyor 70 includes an endless looped chain 72 that functions as a conveying member for conveying the reinforcing bars BL, a drive motor 73 that continuously rotates and drives one of a pair of sprockets 74 around which the chain 72 is wound, and a position-fixed abutment stopper 75 that is fixed to the frame 66. In the aligning conveyor 70, the reinforcing bars BL cut out from the bar cutting device 48 are continuously moved toward the abutment stopper 75, and the reinforcing bars BL arrive one after another and are prevented from moving by the abutment stopper 75, but the chain 72 is continuously driven to move the reinforcing bars BL toward the abutment stopper 75. Therefore, the multiple reinforcing bars BL are rotated around their axis by friction with the chain 72, as shown by the arc-shaped arrow in Fig. 5.

[0037] In the aligning conveyor 70, if a portion of a reinforcing bar BL other than the multiple reinforcing bars BL (three in FIG. 5 ) blocked by the abutment stopper 75 is entangled with the three blocked reinforcing bars BL and positioned above them, the three reinforcing bars BL will rotate around their axes and move toward the upstream side of the aligning conveyor 70, where it will fall onto the aligning conveyor 70. As the other reinforcing bar BL is moved from position BL1 via position BL2 to position BL3, the three reinforcing bars BL and the other reinforcing bar BL will be aligned side by side. If the reinforcing bars BL are deformed bars with oval cross sections as shown in FIG. 2(a), when they are aligned side by side by the aligning conveyor 70, the four reinforcing bars BL will have the same height, as shown in FIG. 6.

[0038] When the number of reinforcing bars BL held back by the abutment stoppers 75 on the aligning conveyor 70 reaches a predetermined number (four in this embodiment), the reinforcing bars BL are aligned horizontally and adjacent to one another in a parallel state, and a placement space for the reinforcing bars BL is formed on the roller conveyor 46, the transfer device 76 transfers the four reinforcing bars BL while they remain aligned horizontally and adjacent to one another in a parallel state onto the roller conveyor 46. As shown in Figures 3 and 6, the transfer device 76 includes two parallel links 78 rotatably mounted on the frame 66 and driven to rotate by a drive motor 77, and a horizontal link 79 having a reinforcing bar receiving member 79a and rotatably connected to the upper end of the parallel links 78.

[0039] The reinforcing bar receiving member 79a has a shape that can collectively receive a predetermined number (four in this embodiment) of reinforcing bars BL that are adjacent to each other and aligned horizontally, and is rotated along a circular trajectory that intersects the longitudinal direction of the roller conveyor 46.

[0040] Returning to Figure 1, the electronic control device 80 is comprised of a so-called microcomputer, and controls the cutting operation by the circular saw cutting machine 10 and the bar fixing operation by the clamping device 30. The electronic control device 80 functionally comprises a cutting control unit 82, a clamping control unit 84, a material supply control unit 86, etc. The cutting control unit 82 uses a belt conveyor (not shown) to pull out a predetermined number of reinforcing bars BL (four in this embodiment) from the roller conveyor 46, starting from their tips, until they hit a positioning stopper (not shown), where they are gripped by the clamping device 30, and then cuts them by reciprocating the circular saw 20, repeatedly.

[0041] The clamp control unit 84 operates the vertical vise hydraulic cylinder 34c of the vertical vise 34 to clamp the four reinforcing bars BL between the support surface FS of the work table 34a and the vertical movable claws 34b, and then moves the vertical movable claws 34b slightly upward to set the clamping pressure of the vertical vise 34 to zero, and then clamps the four reinforcing bars BL horizontally using the horizontal vise 32, and in addition, increases the clamping load of the vertical vise 34 again, and fixes the four reinforcing bars BL on the support surface FS of the work table 34a by clamping pressure by the horizontal vise 32 and clamping pressure by the vertical vise 34.

[0042] The material supply control unit 86 includes a transfer control unit 88 that causes the transfer device 76 to transfer the four reinforcing bars BL on the aligning conveyor 70 onto the roller conveyor 46 when a predetermined time has passed since the four reinforcing bars BL held by the abutment stoppers 75 on the aligning conveyor 70 reached the four reinforcing bars BL and it is determined that the reinforcing bars BL have become adjacent to each other and aligned horizontally in a parallel state, and when a sensor (not shown) detects that space has been formed on the roller conveyor 46 in which the four reinforcing bars BL can be transferred; and an excision control unit 90 that causes the bar excising device 48 (first excision device 54 and second excision device 56) to excise one by one from the many reinforcing bars BL unbundled on the unbundling table chain conveyor 50, which also functions as an unbundling table, onto the aligning conveyor 70 until four reinforcing bars BL are excised onto the aligning conveyor 70.

[0043] As described above, according to the bar supply device 44 of the circular saw cutting machine 10 of this embodiment, the aligning conveyor 70 continuously moves the reinforcing bars BL cut out from the bar cutting device 48 toward the abutment stopper 75, and when the reinforcing bars BL abutting against the abutment stopper 75 are rotated about their axes, if a part of a reinforcing bar BL other than the multiple reinforcing bars BL blocked by the abutment stopper 75 is positioned above the multiple reinforcing bars BL due to their mutual entanglement, the rotation of the multiple reinforcing bars BL about their axes causes the other reinforcing bars BL to move toward the upstream side of the aligning conveyor 70 and drop onto the aligning conveyor 70, where it is aligned with the multiple reinforcing bars BL. As a result, the other reinforcing bar BL and the multiple reinforcing bars BL are aligned side by side, and are transferred in this parallel state onto the roller conveyor (material supply conveyor) 46 by the transfer device 76. This provides a bar supplying device 44 that automatically supplies a predetermined number (four in this embodiment) of reinforcing bars BL to the circular saw cutting machine 10 in a state where the reinforcing bars BL are aligned adjacent to one another.

[0044] Furthermore, according to the bar supply device 44 of the circular saw cutting machine 10 of this embodiment, the reinforcing bars BL are deformed bars with an oval cross section consisting of a pair of parallel sides and a pair of arcs connecting the pair of sides, and the aligning conveyor 70 aligns the four reinforcing bars BL so that they are adjacent to each other in a parallel state at the same height. As a result, the four reinforcing bars BL are transferred onto the roller conveyor (material supply conveyor) 46 by the transfer device 76 in an adjacent to each other in a parallel state at the same height.

[0045] Furthermore, according to the bar supply device 44 of the circular saw cutting machine 10 of this embodiment, the bar cutting device 48 cuts out one by one of the many reinforcing bars BL unbundled on the unbundling table chain conveyor (unbundling table) 50, and the transfer device 76 transfers four reinforcing bars BL onto the roller conveyor (material supply conveyor) 46 when four reinforcing bars BL are blocked by the abutment stoppers 75 on the aligning conveyor 70. This allows stable operation to align the reinforcing bars BL cut out one by one on the aligning conveyor 70, and when four reinforcing bars BL blocked by the abutment stoppers 75 are blocked, the reinforcing bars are transferred onto the roller conveyor (material supply conveyor) 46 by the transfer device 76.

[0046] Furthermore, according to the bar supply device 44 of the circular saw cutting machine 10 of this embodiment, the bar extruding device 48 includes a first extruding device 54 that sequentially extrudes one reinforcing bar BL at a time from a large number of reinforcing bars BL unbundled on the unbundling table chain conveyor (unbundling table) 50 and sends the reinforcing bars BL onto an inclined support member 52 that is inclined so that the downstream side in the conveying direction (x direction) that intersects with the longitudinal direction of the reinforcing bars BL is lower, and a second extruding device 56 that lifts the leading reinforcing bar BL among the reinforcing bars BL supported on the inclined support member 52 and slides it onto the upstream end of the aligning conveyor 70. As a result, stable aligning operation can be achieved on the aligning conveyor 70 by the operation of extruding one reinforcing bar at a time by the first extruding device 54 and the second extruding device 56.

[0047] Furthermore, according to the bar supply device 44 of the circular saw cutting machine 10 of this embodiment, the first cutting-out device 54 is equipped with a blocking stopper 58 that blocks the reinforcing bars BL flowing from the unbundling table chain conveyor (unbundling table) 50, and an upper and lower cutting lever 60 that, as it moves upward, cuts into the gap between the leading reinforcing bar BL and the following reinforcing bars BL among the multiple reinforcing bars BL blocked by the blocking stopper 58, lifting the leading reinforcing bar BL and causing it to climb over the blocking stopper 58 and drop onto the upstream end of the inclined support member 52. This makes it possible to cut out the reinforcing bars BL one by one with a small and simple structure.

[0048] In addition, according to the bar material supply device 44 of the circular saw cutting machine 10 of this embodiment, the second cutting device 56 includes a lifter 64 formed with a bar material receiving portion 64a of a predetermined width for scooping up the reinforcing bar BL on the inclined support member 52 and an arc-shaped portion 64b passing through the outer end of the bar material receiving portion 64a, and which can be rotated back and forth between an elevated position and a lowered position around the center line of curvature C3 of the arc-shaped portion 64b with the arc-shaped portion 64b in sliding contact with the reinforcing bar BL supported by the inclined support member 52, and a stopper member 68 which is fixed in a position to prevent the reinforcing bar BL received by the bar material receiving portion 64a from moving toward the center line of curvature C3, and which is inclined so that the higher it becomes, the further it moves away from the inclined support member 52 so that the effective length of the bar material receiving portion 64a which receives the reinforcing bar BL in the elevated position of the lifter 64 becomes shorter as the lifter 64 rises, allowing only one reinforcing bar BL to be placed on it. This allows the reinforcing bars BL to be reliably cut out one by one and sent onto the aligning conveyor 70.

[0049] 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 modes.

[0050] For example, in the above-described embodiment, the reinforcing bars BL are deformed reinforcing bars, but they may be rod-shaped steel materials, etc. Even with rod-shaped steel materials, there are variations in cross-sectional shapes, and the same problem occurs.

[0051] Furthermore, although the bar extruding device 48 in the above-described embodiment extrudes the reinforcing bars BL one by one onto the aligning conveyor 70, it may also extrude two or three reinforcing bars at a time. Furthermore, the bar extruding device 48 may be composed of only one of the first extruding device 54 and the second extruding device 56.

[0052] Furthermore, in the above-described embodiment, the transfer device 76 was described as placing four reinforcing bars BL from the alignment conveyor 70 onto the roller conveyor, but the number of reinforcing bars does not necessarily have to be four; as long as there are three or more reinforcing bars, the effects of the present invention can be enjoyed.

[0053] The above is merely one embodiment, and although other examples will not be given, the present invention can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art within the scope of the present invention. [Explanation of symbols]

[0054] 10:Circular saw cutting machine 10 20:Circular saw 30: Clamping device 44: Bar material feeding device 46: Roller conveyor (material supply conveyor) 48: Bar material cutting device 50: Unbundling table chain conveyor (unbundling table) 52: Inclined support member 54:First cutting device 56:Second cutting device 58: Dam stopper 60: Upper and lower cut-out lever 64: Lifter 64a: Bar receiving part 64b: Arc-shaped part 68: Stopper member 70: Alignment conveyor 75: Stopper 76: Transfer equipment BL: Reinforced concrete (bar) C3: Curvature center line

Claims

1. A bar supply device for a circular saw cutting machine, which simultaneously cuts a predetermined number of bar materials into a predetermined length by rotating a circular saw into a predetermined number of bar materials clamped by a clamping device and aligned adjacent to each other in a parallel state, supplies the predetermined number of bar materials aligned adjacent to each other from a material supply conveyor, a bar cutting device for cutting out one bar at a time from the plurality of bars unbundled on an unbundling table; an alignment conveyor having an endless looped chain that is continuously rotated by an electric motor and a stopper, and which attempts to continuously move the bar material extruded from the bar extruding device on the chain toward the stopper, thereby causing the bar material abutting against the stopper to rotate about an axis by friction between the chain and the bar material; a transfer device that transfers the predetermined number of bar materials onto the material supply conveyor when the predetermined number of bar materials blocked by the abutment stoppers on the aligning conveyor are aligned adjacent to each other in a parallel state, When a longitudinal portion of a bar other than the plurality of bars blocked by the stopper on the chain is positioned above the plurality of blocked bars due to the entanglement of the bars, the aligning conveyor moves the longitudinal portion of the other bar to the upstream side of the aligning conveyor by rotating the plurality of bars about their axes and drops it onto the aligning conveyor, thereby eliminating the entanglement and automatically aligning it with the plurality of bars. A bar material supply device for a circular saw cutting machine.

2. The rod is a deformed steel bar having an oval cross section consisting of a pair of parallel sides and a pair of arcs connecting the pair of sides, The aligning conveyor aligns the predetermined number of bars so that they are adjacent to each other in parallel at the same height.

2. A bar feeder for a circular saw machine according to claim 1.

3. the bar cutting device cuts out and feeds out one bar at a time from the plurality of bars unbundled on the unbundling table, When the number of the bars blocked by the stoppers on the aligning conveyor reaches the predetermined number, the transfer device transfers the predetermined number of bars onto the supply conveyor.

2. A bar feeder for a circular saw machine according to claim 1.

4. The bar material extruding device includes a first extruding device that sequentially extrudes the bar material one by one from the multiple bar materials unbundled on the unbundling table and sends the bar material onto an inclined support member that is inclined so that the downstream side in a conveying direction that intersects with the longitudinal direction of the bar material is lower, and a second extruding device that lifts the bar material located at the forefront of the bar materials supported on the inclined support member and slides it onto the upstream end of the aligning conveyor.

2. A bar feeder for a circular saw machine according to claim 1.

5. A bar material supply device for a circular saw cutting machine, which simultaneously cuts a predetermined number of bar materials into a predetermined length dimension by rotating a circular saw into a predetermined number of bar materials clamped by a clamping device and aligned adjacent to each other in a parallel state, and supplies the predetermined number of bar materials aligned adjacent to each other from a material supply conveyor to the circular saw cutting machine, a bar cutting device for cutting out one bar at a time from the plurality of bars unbundled on an unbundling table; an alignment conveyor having a stopper, which continuously moves the bar material extruded from the bar extruding device toward the stopper, thereby rotating the bar material abutting against the stopper around an axis; a transfer device that transfers the predetermined number of bar materials onto the material supply conveyor when the predetermined number of bar materials blocked by the abutment stoppers on the aligning conveyor are aligned adjacent to each other in a parallel state, The bar material extruding device includes a first extruding device that sequentially extrudes the bar material one by one from the multiple bar materials unbundled on the unbundling table and sends the bar material onto an inclined support member that is inclined so that the downstream side in a conveying direction intersecting with the longitudinal direction of the bar material is lower, and a second extruding device that lifts the bar material located at the forefront of the bar materials supported on the inclined support member and slides it onto the upstream end of the aligning conveyor, The first feeding device includes a blocking stopper that blocks the bar material flowing from the unbundling table, and an upper and lower feeding lever that, as the first feeding device moves upward, cuts into a gap between a leading bar material and a trailing bar material blocked by the blocking stopper, lifts the leading bar material, and causes it to climb over the blocking stopper and drop onto the upstream end of the inclined support member. A bar material supply device for a circular saw cutting machine.

6. The second extruding device includes a lifter formed with a bar receiving portion of a predetermined width for scooping up the bar material on the inclined support member and an arc-shaped portion passing through the outer end of the bar receiving portion, the lifter being rotated back and forth between a raised position and a lowered position about the center line of curvature of the arc-shaped portion with the arc-shaped portion in sliding contact with the bar material supported by the inclined support member, and a stopper member fixed at a position that prevents the bar material received in the bar receiving portion from moving toward the center line of curvature, the stopper member being inclined so that the effective length of the bar receiving portion that receives the bar material in the raised position of the lifter becomes shorter as the lifter rises, allowing only one bar material to be placed on it.

5. A bar feeder for a circular saw machine according to claim 4.

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