JP2010214553A - Bar material feeder of bar material cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bar material feeder of a bar material cutting machine, positioning a bar material in the horizontal direction without causing interference noise or impact noise and without using an actuator for pushing the bar material to a horizontal reference member. <P>SOLUTION: A plurality of height reference rollers 33 which function as stoppers to a plurality of the bar materials 22 on a chain conveyor 23 (a bar material conveying device) when a turning shaft 31 is in a first turning position, and functions as a height reference when the turning shaft 31 is in a second turning position, a plurality of lateral reference rollers 34 which function as a support member for supporting one bar material 22 positioned in a feeding position (A) when the turning shaft 31 is in the first turning position, and function as a lateral reference when the turning shaft 31 is in the second turning position, and a plurality of cam-shaped stopper members 35, which do not contact the bar material 22 positioned at the next to one bar material 22 with the lateral reference rollers 34 when the turning shaft 31 is in a turning process between the first turning position and the second turning position, are provided on the turning shaft 31 at a predetermined interval. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bar supply device that supplies a bar to a bar cutting machine for cutting bar such as round steel, bar, steel pipe and the like.

  2. Description of the Related Art A rod cutting machine is known that includes a feeding device that grips a rod and feeds it in a predetermined cutting length in the axial direction and a cutting device that cuts the rod perpendicular to the axial direction. Such a bar cutting machine repeats a process of feeding a bar by a predetermined length (cutting length) by the feeding device and then cutting by a very thin circular saw provided in the cutting device. The bar material is cut into a plurality of products having the above-mentioned cutting length. This is the device disclosed in Patent Document 1.

  By the way, in the above-described bar cutting machine, as described in detail in Patent Document 2, a plurality of bars that are held in a parallel state by being stopped by a stopper are supplied to the feeding device one by one. A bar supply device is provided. In this bar supply device, a horizontal direction that is arranged below one bar located on the supply side among a plurality of bars that are kept waiting in parallel and is orthogonal to the longitudinal direction of the bar The one bar is lifted above the stopper by being rotated around the axis of the shaft and rolled along the inclined upper edge, whereby one bar is moved to the feeding device. A plurality of workpiece transfer tools to be supplied one by one are arranged at predetermined intervals.

JP 2001-293615 A JP 2000-219318 A

  By the way, in the bar supply device of the bar cutting machine as described in the above-mentioned Patent Document 2, one bar is rolled along the inclined upper edge of the workpiece transfer tool to When it is lowered to the feeding position, it is brought into contact with the stopper of the bar supply mechanism installed upright at an angle, so that there is a disadvantage that a large interference sound or impact sound is generated. In addition, after the bar is brought into contact with the stopper standing upright, the bar is set up diagonally and lowered along the stopper while rotating the workpiece transfer tool to the horizontal original position. When moving to the height reference roller (horizontal roller) with the horizontal reference roller (straight roller) of the material supply mechanism, a gap is generated between the horizontal reference roller and the bar to the horizontal reference roller. If the actuator to be pressed is not used, there is a disadvantage that the horizontal positioning cannot be performed.

  The present invention has been made against the background of the above circumstances, and the object of the present invention is to generate no interference sound or impact sound, and without using an actuator that presses the bar to the lateral reference member. An object of the present invention is to provide a bar supply device for a bar cutting machine capable of horizontal positioning.

  The gist of the invention according to claim 1 for achieving the above object is as follows: (a) a bar material conveying device for conveying a plurality of bar materials in a parallel direction toward a preset supply standby position; A bar supply mechanism that supplies one bar that has reached the supply standby position among the plurality of bars to a feeding position for feeding the bar in a predetermined cutting length in the axial direction; A bar supply device for a bar cutting machine, the bar supply mechanism being supported so as to be rotatable about a single axis parallel to a plurality of bars transported by the bar transport device. A rotation shaft that is rotated between the first rotation position and the second rotation position; and (c) a plurality of rotation shafts provided at predetermined intervals on the rotation shaft. When it is in the first rotation position, it functions as a stopper for the plurality of bars, and the rotation shaft is in the second rotation position A height reference roller that functions as a height reference; and (d) a plurality of the reference shafts provided at a predetermined interval on the rotation shaft, and when the rotation shaft is in the first rotation position, A horizontal reference member that functions as a support member for supporting the bar and that performs lateral positioning when the rotation shaft is in the second rotation position; and (e) a predetermined interval from the rotation shaft. When a plurality of the rotation shafts are in the rotation process between the first rotation position and the second rotation position, the bar positioned next to the one bar is set as the horizontal reference. And a cam-like stopper member that does not contact the member.

  Further, the gist of the invention according to claim 2 is that (f) the bar material conveying device has a plurality of endless chains driven along a plurality of horizontal and parallel conveying rails, The endless chain is composed of a chain conveyor that conveys the plurality of bars by a portion located on the horizontal conveyance rail.

  According to the bar supply device of the bar cutting machine of the invention according to claim 1, when the rotation shaft is in the first rotation position, it functions as a stopper for the plurality of bars, and the rotation shaft is A height reference roller that functions as a height reference when in the second rotation position, and a support member that supports the one bar when the rotation shaft is in the first rotation position. When the moving shaft is in the second rotation position, a plurality of lateral reference members for lateral positioning are provided at predetermined intervals on the rotation shaft, and the rotation shaft is the first rotation. A cam-like stopper member that does not bring the bar positioned next to the one bar into contact with the lateral reference member during the rotation process between the position and the second rotation position is predetermined on the rotation axis. Since a plurality of them are provided at an interval of In the process of rotating to the rotating position, one bar that has reached the supply standby position is supported by the horizontal reference member and lifted, and at the same time contacts the height reference roller. Moved to position. In the second rotation position, the one bar is supported in the height reference roller and is sent in the axial direction to be sequentially cut. In this way, when one bar is supplied to the feeding position for feeding a predetermined cutting length in the axial direction, there is no rolling of the bar, and it is in contact with the lateral reference member and in the lateral direction. Since the position is determined, no interference sound or impact sound is generated, and a positioning mechanism using an actuator is unnecessary, which simplifies the apparatus.

  Moreover, according to the bar feeder of the bar cutting machine of the invention according to claim 2, the bar transporter includes a plurality of endless chains driven along a plurality of horizontal and parallel transport rails. And is composed of a chain conveyor that conveys the plurality of bars by a portion located on the horizontal conveyance rail of the endless chain, compared to a case where it is composed of an inclined table, There is an advantage that the pressure from the plurality of bars on the lateral reference member or the cam-like stopper member at the first rotation position is reduced.

It is a front view which shows the bar cutting machine which is one Example of this invention. It is the top view which looked at the bar cutting machine of FIG. 1 from the direction shown by arrow II in the state which removed the cover. It is the side view which looked at the bar supply apparatus of FIG. 2 from the direction shown by arrow III, Comprising: It is a figure which shows the state which has a bar supply mechanism in a 1st rotation position. It is the side view which looked at the bar supply apparatus of FIG. 2 from the direction shown by arrow III, Comprising: It is a figure which shows the state which has a bar supply mechanism in a 2nd rotation position. It is the front view which removed the cover from the bar cutting machine of FIG. It is sectional drawing seen from the direction perpendicular | vertical to the feeding direction which notched a part of feeding apparatus and main vise in the bar cutting machine of FIG. It is the top view which looked at the sending device and main vice of Drawing 6 from the direction shown by arrow VII. It is the figure which looked at the movable part in the feeding apparatus of FIG. 7 from the direction shown by arrow VIII. FIG. 9 is a sectional view taken along line IX-IX in FIG. 8.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a bar cutting machine 10 according to an embodiment of the present invention. FIG. 2 is a view from the direction indicated by an arrow II in FIG. 1 with the covers 10a and 10b of the bar cutting machine 10 removed. FIG. As shown in these drawings, the bar cutting machine 10 includes a feeding vise 18 that grips a part of a bar 22 that is a metal workpiece such as round steel, square steel, and steel pipe. A main body 12 including a feeding device 16 that feeds the bar 22 held by the vice 18 by a predetermined cutting length in the axial direction and a cutting device 20 that cuts the bar 22 at the cutting length; A feeding device 16 for feeding a plurality of rods 22 in a state where the rods 22 can be gripped by the feeding vice 18, that is, feeding the rods 22 by a predetermined cutting length in the axial direction. It is comprised from the bar supply apparatus 14 supplied to the feeding position A.

  As shown in detail in FIG. 2, the bar supply device 14 is a chain conveyor 23 that functions as a bar transport device that sequentially transports a plurality of bars 22 placed in parallel to each other to the feeding device 16 side. And one bar 22 that has reached the supply standby position B on the feeding device 16 side is taken out from a plurality (three in FIG. 2) of bars 22 placed in parallel with each other. And a bar supply mechanism 30 for supplying to the feeding position A of the feeding device 16. The feeding position A is a position where the bar 22 fed by a predetermined cutting length by the feeding device 16 is positioned. In FIG. 2, the feeding position A is indicated by a one-dot chain line corresponding to the axial center position of the bar 22. It is. Further, the supply standby position B is located on the feeding device 16 side among a plurality of bars 22 parallel to each other on the chain conveyor 23 and comes into contact with the height reference roller 33 at the first rotation position. This is a position where one bar 22 supplied to the feeding position A one by one by the bar supply mechanism 30 is positioned. In FIG. 2, 1 corresponding to the axial center position of the bar 22 Indicated by the dotted line.

  FIG. 3 is a side view of the bar supply device 14 viewed from the direction indicated by the arrow III in FIG. As shown in this figure, the chain conveyor 23 functioning as a bar material transport device or a bar material storage device of the bar material supply device 14 has a plurality of (9 in this embodiment) stoppers 24s for preventing the bar material from dropping. , A pair of shafts 26 rotatably supported by the base 24 via a plurality of pairs of bearings 25, and a speed reducer that rotationally drives one of the pair of shafts 26. The motor GM includes a plurality of pairs of sprockets 27 fixed to the pair of shafts 26, and a plurality of endless chains 28 wound around the plurality of pairs of sprockets 27, respectively. The chain conveyor 23 has a plurality of horizontal and parallel transport rails 29 fixed to a base 24, and a plurality of bars are arranged by a portion of the endless chain 28 positioned on the horizontal transport rail 29. The material 22 is conveyed. Compared with the case where the bar supply device 14 is configured by an inclined base, the pressure from the plurality of bars 22 on the height reference roller 33 or the cam-like stopper member 35 at the first rotation position described later is reduced. There are advantages.

  The bar supply mechanism 30 of the bar supply apparatus 14 includes a rotation shaft 31 supported rotatably by a base 24 via a bearing 31b, and a predetermined interval in the axial direction between the rotation shaft 31 and the rotation shaft 31. A plurality of height reference rollers 33, a horizontal reference roller 34, and a cam-like stopper member 35 that are fixed via a fixing member 32 are provided. The rotating shaft 31 is angled by 90 ° from each other by a hydraulic cylinder 37 having a cylinder rod rotatably connected to an arm 36 fixed thereto and a cylinder rotatably connected to the base 24. Are positioned at a first rotation position and a second rotation position, and are reciprocated between them. The height reference roller 33, the horizontal reference roller 34, and the cam-like stopper member 35 constitute one set by being fixed to the fixing member 32. Therefore, a plurality of sets of the height reference roller 33, the horizontal reference roller 34 and a cam-like stopper member 35 are fixed to the rotating shaft 31 at predetermined intervals.

  FIG. 3 shows a state in which the rotation shaft 31 is positioned at the first rotation position by the hydraulic cylinder 37. FIG. 4 shows a state in which the rotation shaft 31 is positioned at the second rotation position by the rotation hydraulic cylinder 37. The height reference roller 33 is a columnar rotating body provided on the fixed member 32 so as to be rotatable about an axis, and when the rotating shaft 31 is in the first rotating position, as shown in FIG. A stopper which stands up and rotates around a vertical axis and comes into contact with one bar 22 positioned on the feeding device 16 side among a plurality of bars 22 parallel to each other on the chain conveyor 23. Function as. Further, when the rotation shaft 31 is in the second rotation position, the height reference roller 33 is rotated around a horizontal axis as shown in FIG. 4, and the rotation shaft 31 is in the second rotation position. When it is, it functions as a height reference member for positioning in the height direction of one bar 22 at the feed position A.

  The horizontal reference roller 34 is a columnar rotating body provided on the fixed member 32 so as to be rotatable around an axis perpendicular to the axis of the height reference roller 33, and the rotation shaft 31 is at the first rotation position. In some cases, as shown in FIG. 3, a plurality of bars that rotate around a horizontal axis and are positioned below the bar 22 on the chain conveyor 23 and that are parallel to each other on the chain conveyor 23. It functions as a support member for supporting one bar 22 located on the feeding device 16 side, that is, the supply standby position B of the material 22. Further, when the rotation shaft 31 is in the second rotation position, the horizontal reference roller 34 has one bar 22 at the feeding position A supported by the height reference roller 33 as shown in FIG. It functions as a lateral reference member for positioning in the lateral direction (horizontal direction).

  When the rotation shaft 31 is in the rotation process between the first rotation position and the second rotation position, the horizontal reference roller 34 supports one bar 22 positioned at the supply standby position B. However, when the cam-like stopper member 35 is not provided, it is located at the supply standby position B when the lateral reference roller 34 passes. There is a possibility that the bar 22 positioned next to one bar 22 rolls due to its own weight and falls to the back side (counterclockwise side) of the horizontal reference roller 34. Thus, when the bar 22 positioned next to the supply standby position B falls to the back side of the horizontal reference roller 34, the horizontal reference roller 34 and the horizontal reference roller 34 are moved back from the second rotation position to the first rotation position. It interferes and its return is hindered. For this reason, the cam-like stopper member 35 comes into contact with the bar 22 positioned next to the supply standby position B when the lateral reference roller 34 moves from the first rotation position toward the second rotation position. By holding the position, the falling of the lateral reference roller 34 to the back side is prevented. Further, the cam-like stopper member 35 is configured such that when the lateral reference roller 34 moves back to the first rotation position and the axis thereof becomes horizontal, the bar 22 positioned next to the supply standby position B becomes the lateral reference roller 34. Allow moving up.

  That is, the cam-like stopper member 35 is formed of a fan-shaped plate material composed of two straight sides that intersect with each other at about 90 ° and an arc connecting the outer peripheral ends of the two sides. Then, when viewed in the axial direction of the rotating shaft 31, one of the two sides is located within the diameter of the horizontal reference roller 34 and the other side is on the opposite side of the horizontal reference roller 34 of the fixing member 32. The cam-like stopper member 35 is fixed to the fixing member 32 so as to be in contact with each other, that is, to be tangent to the fixing member 32 and so that the center of the arc coincides with the axis of the rotation shaft 31.

  5 is a front view of the bar cutting machine 10 of FIG. 1 as viewed from the direction indicated by the arrow V with the cover 10a removed. As shown in the figure, the main body 12 includes a base 38, a feeding device 16 provided on the base 38, a cutting device 20 provided on the base 38, and a cutting device. It comprises a main vice 40 for gripping and fixing the bar 22 at the time of cutting by the apparatus 20. The cutting device 20 is provided with a support portion 42 provided on the base 38, an arm member 43 provided so as to be rotatable about an attachment shaft of the support portion 42, and a rotatable structure on the arm member 43. The thin circular saw 44, the circular saw motor 45 for rotationally driving the circular saw 44, the belt 46 connecting the circular saw 44 and the circular saw motor 45, and the arm member 43 are connected to each other. And a cutting device hydraulic cylinder 48 for rotating around the mounting shaft of the support portion 42. Here, FIG. 5 shows a state in which the cutting device 20 is most rotated to the feeding device 16 side, and the cutting device 20 approaches the feeding device 16 when cutting the bar 22. It is rotated in the direction, and once cut is finished, it is moved back in the direction away from the feeding device 16.

  6 is a cross-sectional view of the feeding device 16 and the main vice 40 cut out from a direction perpendicular to the feeding direction, and FIG. 7 is seen from the direction indicated by the arrow VII in FIG. It is a top view. As shown in these drawings, the feeding device 16 has a ball screw installed on a base 38 so that its axial direction is parallel to the feeding direction of the feeding device 16 and is rotatable about its axis. 50, similarly, a pair of guide shafts 52 fixed to the base 38 so that the axial direction thereof is parallel to the feeding direction of the feeding device 16, and a pair of shafts having mutually parallel axes. The pair of guide shafts 52 are inserted into the pair of through holes 56 so as to be movable in the axial direction of the guide shaft 52, and the screw holes 58 are provided. The movable member 54 screwed into the ball screw 50, the feeding vise 18 provided on the movable member 54, the feeding device motor 60 for rotationally driving the ball screw 50, and the ball screw 50. The connection device to the feeding device motor 60 It is constituted by a preparative 62. Further, a first roller 64 is provided on the base 38, a second roller 66 is provided on the movable member 54, and a third roller 68 is provided on the main vice 40 so as to be rotatable around the respective axes. The material 22 is conveyed while being supported by the first roller 64 and the second roller 66, and depending on the remaining length of the third roller 68 and the bar 22, the first roller 64 and the second roller 66 It cuts in the state supported by.

  The bar cutting machine 10 controls the hydraulic control circuit 72 for supplying a predetermined hydraulic pressure to the feeding device 16 and the cutting device 20, the driving of the circular saw motor 45 and the feeding device motor 60, and An electronic control device 74 is provided for controlling the driving of the feeding device 16 and the cutting device 20 by controlling switching of a solenoid valve (not shown) in the hydraulic control circuit 72. When the feeding device motor 60 is driven, the driving force is transmitted to the ball screw 50 via the belt 62, and the ball screw 50 is driven to rotate about the axis, whereby the ball screw 50 is screwed. The combined movable member 54 is moved in the feeding direction, that is, in the axial direction common to the ball screw 50 and the pair of guide shafts 52. Here, the feeding device motor 60 is a servo motor including an encoder 70 connected to the electronic control device 74.

  A protrusion 76 is provided at the bottom of the movable member 54, and a first proximity switch 78 is provided at a position corresponding to the protrusion 76 at the movement limit of the movable member 54 on the cutting device 20 side indicated by a solid line in FIG. A second proximity switch 80 and a third proximity switch 82 are provided at positions corresponding to the protrusions 76 at the movement limit of the movable member 54 on the feeding device motor 60 side indicated by a chain line. The first proximity switch 78, the second proximity switch 80, and the third proximity switch 82 are connected to the electronic control device 74, and the movable member 54 is connected to the cutting device 20 by an on / off signal of the proximity switch. The driving of the feeding device motor 60 is controlled so as to be moved within the range from the movement limit on the side to the movement limit on the feeding device motor 60 side.

  The main vice 40 is shown between the first hydraulic cylinder 84 and the second clamping member 90 for clamping the bar 22 with the first clamping member 86 in the direction indicated by the arrow Y in FIG. 7 and a second hydraulic cylinder 88 for clamping in the direction indicated by the arrow X. The hydraulic pressures of the first hydraulic cylinder 84 and the second hydraulic cylinder 88 are supplied through the hydraulic control circuit 72, and the gripping and releasing of the bar 22 are switched according to the hydraulic pressure. Here, in the portion corresponding to the path of the circular saw 44 in the first clamping member 86, the piston of the second hydraulic cylinder 88, and the second clamping member 90, the rotation of the circular saw 44 is not hindered. Groove portions 92, 94, and 96 are formed, respectively.

  FIG. 8 is a view of the movable portion of the feeding device 16 as seen from the direction indicated by the arrow VIII in FIG. As shown in this figure, the feeding vise 18 provided on the movable member 54 is configured to clamp the bar 22 between the third clamping member 98 and the third hydraulic cylinder 100. The operating hydraulic pressure of the third hydraulic cylinder 100 is supplied via the hydraulic control circuit 72, and the gripping and releasing of the bar 22 are switched according to the hydraulic pressure. When the feeding device motor 60 is driven and the movable member 54 is moved while the bar 22 is gripped, the gripped bar 22 is conveyed by the same distance as the movable member 54.

  9 is a cross-sectional view taken along the line IX-IX in FIG. 8 of the third hydraulic cylinder 100 provided in the feeding vise 18. As shown in this figure, the third hydraulic cylinder 100 includes a cylinder body 102 fixed to the movable member 54, a piston 104 reciprocated in the cylinder body 102, and a piston 104 fixed to the tip of the piston 104. The clamping head 106 is fixed to the clamping head 106 so that the axial direction of the clamping head 106 is parallel to the reciprocating direction of the piston 104, and a through hole 110 is formed coaxially with the cylinder body 102. The guide shaft 108 is inserted into the guide shaft 108. In the third hydraulic cylinder 100 configured as described above, when hydraulic oil is supplied to an oil chamber 112 that is a gap between the cylinder body 102 and the piston 104, the clamping head provided at the piston 104 and the tip thereof. 106 is moved in a direction in which the bar 22 is clamped with the third clamping member 98. At this time, since the guide shaft 108 is inserted into the through hole 110 formed in the cylinder body 102, the clamping surface 114 of the clamping head 106 is maintained substantially perpendicular to the reciprocating direction of the piston 104. Be drunk.

  As shown in FIGS. 6, 7, and 8, the feeding device 16 includes a first photoelectric sensor 116 and a second photoelectric sensor 118. The first photoelectric sensor 116 is provided so as not to move relative to the base 38, and indicates whether or not the tip of the bar 22 that is gripped and fed by the feeding vise 18 is sent from the predetermined position D1 to the cutting device 20 side. It is to detect. Further, the second photoelectric sensor 118 is provided on the movable member 54 so as not to move relative to the movable member 54, and when the bar 22 is gripped by the feeding vise 18, the end thereof is closer to the cutting device 20 than the predetermined position D2. Whether or not. The predetermined position D1 is a fixed position based on the base 38, and the predetermined position D2 is a fixed position based on the movable member 54. The first photoelectric sensor 116 and the second photoelectric sensor 118 are connected to the electronic control unit 74. When the first photoelectric sensor 116 is turned on / off (incident / light-shielded), the cutting of the bar 22 is started. The tip position is detected, and the driving of the feeding device 16 and the cutting device 20 is controlled so that the bar 22 is cut from the tip with a cutting length. Further, the end position of the bar 22 is detected by the on / off signal of the second photoelectric sensor 118, and the remaining length of the bar 22 gripped by the feeding vise 18 is the gripping length L of the feeding vise 18. That is, when the length is equal to or shorter than a predetermined length shorter than the sum of the length in the conveyance direction common to the third clamping member 98 and the clamping head 106 and the projectable dimension, a predetermined correction is made to the cutting length. The driving of the feeding device 16 is controlled so as to convey the added correction cutting length.

  In the bar cutting machine 10 configured as described above, the following control operation is performed by the electronic control unit 74. First, a plurality of bar members 22 arranged in parallel on the chain conveyor 23 are transported, and one bar member on the bar supply mechanism 30 or the feeding device 16 side among the plurality of bar members 22. 22 reaches the supply standby position B and is placed on the horizontal reference roller 34 in the first rotation position. Next, the rotation shaft 31 at the first rotation position is rotated to the second rotation position by using the rotation hydraulic cylinder 37, and the one bar 22 is fed onto the height reference roller 33. Position A. Next, after the feeding vise 18 grips and feeds the bar material 22 and the first photoelectric sensor 116 is turned off (light-shielded state), the tip position of the bar material 22 is detected, and then the tip surface of the bar material 22 is The initial feeding for aligning the tip is performed so as to coincide with the passing surface of the circular saw 44, and after the bar 22 is sent to the cutting device 20 side by a predetermined cutting length by the feeding device 16, Cut with the cutting length. That is, after the feed vise 18 releases the bar 22 and the main vice 40 grips the bar 22, the movable member 54 is returned by the cutting length in the direction away from the cutting device 20, With the feeding vise 18 holding the bar 22 and the main vice 40 releasing the bar 22, the movable member 54 feeds the cutting length in the direction approaching the cutting device 20. Then, with the feeding vice 18 releasing the bar 22 and holding the bar 22 with the main vice 40, the bar 22 is cut by the cutting length by the cutting device 20. Next, based on the number of cuts after the second photoelectric sensor 118 is determined to be on, it is determined whether or not to end the cutting process. When the determination is negative, the above operation is repeated, but when the determination is affirmative, the cutting of one bar 22 is ended therewith.

  As described above, according to the bar supply device 14 of the bar cutting machine 10 of the present embodiment, the chain conveyor 23 (bar material transfer device) when the rotation shaft 31 is in the first rotation position shown in FIG. A height reference roller 33 functioning as a height reference when the rotation shaft 31 is located at the second rotation position shown in FIG. When it is in the first rotation position shown in FIG. 3, it functions as a support member that supports one bar 22 located in the feeding position A, and its rotation shaft 31 is in the second rotation position shown in FIG. In some cases, a plurality of horizontal reference rollers 34 functioning as a horizontal reference are provided on the rotation shaft 31 at a predetermined interval, and the rotation shaft 31 is located between the first rotation position and the second rotation position. Is positioned next to the one bar 22 Since a plurality of cam-like stopper members 35 that do not bring the bar 22 into contact with the lateral reference roller 34 are provided on the rotation shaft 31 at a predetermined interval, the second rotation position is changed from the first rotation position. In the process of being rotated to the right, one bar 22 that has reached the supply standby position B is supported and lifted by the horizontal reference roller 34 and simultaneously contacts the height reference roller 33. In this state, the second rotation is performed. The single bar 22 is moved to the position, and the feeding position A is set. At the second rotation position, the one bar 22 is fed in the axial direction while being supported by the height reference roller 33 and is sequentially cut. Thus, when one bar 22 is supplied to the feed position A for feeding by a predetermined cutting length in the axial direction, the bar 22 is not rolled and is in contact with the lateral reference roller 34. Since the position in the lateral direction is determined, no interference sound or impact sound is generated, and a positioning mechanism using an actuator is unnecessary, and the apparatus is simplified.

  Further, according to the bar supply device 14 of the bar cutting machine 10 of the present embodiment, the bar transport device is driven along the plurality of transport rails 29 that are horizontal and parallel to each other. And a chain conveyor 23 that conveys a plurality of bars 22 by a portion of the endless chain 28 that is located on the horizontal conveyance rail 29. Compared with the case where it does, there exists an advantage by which the pressure from the several bar 22 with respect to the horizontal reference roller 34 or the cam-shaped stopper member 35 in a 1st rotation position is reduced.

  The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other modes.

  For example, in the above-described embodiment, the bar material transport device of the bar material supply device 14 is configured by the chain conveyor 23. However, the bar material 22 is transported to the supply standby position B by rolling by the own weight. You may be comprised from the inclination board.

  The horizontal reference roller 34 of the above-described embodiment is a columnar rotating member provided on the fixed member 32 so as to rotate about the axis, but may be a columnar or prismatic non-rotating member. .

  Although not exemplified one by one, the present invention is implemented with various modifications within the scope not departing from the gist thereof.

10: Bar material cutting machine 14: Bar material supply device 20: Cutting device 22: Bar material 23: Chain conveyor (bar material conveying device)
28: Endless chain 29: Transport rail 30: Bar material supply mechanism 31: Rotating shaft 33: Height reference roller 34: Horizontal reference roller (horizontal reference member)
35: Cam-like stopper member A: Feeding position B: Supply standby position

Claims (2)

A bar transport device that transports a plurality of bar members in a parallel direction toward a preset supply standby position, and one bar member that has reached the supply standby position among the plurality of bar members, A bar material supply device of a bar material cutting machine provided with a bar material supply mechanism that supplies a feed position for feeding by a predetermined cutting length in the axial direction, the bar material supply mechanism,
Rotation supported around a single axis parallel to a plurality of bars conveyed by the bar conveying device, and rotated between a first rotation position and a second rotation position. The axis,
A plurality of the rotation shafts are provided at a predetermined interval, and when the rotation shafts are in the first rotation position, the rotation shafts function as stoppers for the plurality of bar members, and the rotation shafts are the second shafts. A height reference roller that functions as a height reference when in the pivot position;
A plurality of the rotation shafts are provided at a predetermined interval, and when the rotation shaft is in the first rotation position, the rotation shaft functions as a support member that supports the one bar member, and the rotation shaft A lateral reference member for lateral positioning when in the second rotational position;
When the pivot shaft is provided with a predetermined interval and the pivot shaft is in the pivoting process between the first pivot position and the second pivot position, the one bar member And a cam-like stopper member that does not allow the bar located next to the lateral reference member to come into contact with the horizontal reference member. The bar material conveying device has a plurality of endless chains driven along a plurality of horizontal and parallel conveying rails, and the portion of the endless chain located on the horizontal conveying rails 2. The bar feeder for a bar cutter according to claim 1, comprising a chain conveyor for conveying a plurality of bars.

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