JP2011143443A - Workpiece separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece separation apparatus which has comparatively simple constitution. <P>SOLUTION: The workpiece separation apparatus includes:an elevating table 12 which has a workpiece placing face 11 and is constituted so as to be reciprocated between a first position where the conveying face 7 of a conveying device 2 and the workpiece placing face 11 are at the same height and a second position which is higher than the first position; a first energizing means 13 for energizing the elevating table 12 upward; a workpiece positioning means 14 for positioning the workpiece placed on the workpiece placing face 11 in the conveying direction A when the elevating table 12 is at the first position; and a pressing means 15 which is mounted fixedly to the vertically moving upper die 5 of a press working apparatus 3 and which presses the elevating table 12 against the first position when the upper die 5 is lowered and the releases elevating table 12 to allow it to move to the second position when the upper die 5 is elevated. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a workpiece separating device for separating a workpiece to be processed by a press working device from a series of workpieces that are aligned and conveyed on a conveying surface of a conveying device.

  As known from Patent Document 1, a belt conveyor, a feed bar, and the like are conventionally used to supply a work to a press working apparatus such as a transfer press machine. The feed bar of the apparatus of Patent Document 1 moves only in a plane orthogonal to the press direction, and the conveying surface of the belt conveyor and the operation plane of the feed bar are basically at the same level. This configuration provides the advantage that the configuration and control of the feed bar is relatively simple. Further, in the case of the apparatus of Patent Document 1, works aligned in a line on the conveyor surface of the belt conveyor are separated into individual works by a work separating apparatus, and then are gripped by a feed bar and fed into a press working apparatus. .

JP 2002-96927 A

  In the apparatus described in Patent Document 1, the feed bar has a relatively simple structure, whereas the workpiece separating apparatus is composed of two first and second passage blocking means, which are formed by an air cylinder. In addition to having a relatively complex configuration that is driven up and down and rotationally, it is also necessary to be controlled in order to match the timing of operation with the operation of the feed bar.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a workpiece separating device having a relatively simple configuration.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a press working device (3) that uses a series of workpieces (W) that are aligned and transported on a transport surface (7) of a transport device (2). A workpiece separating device for separating a workpiece (W) to be machined, which is a lifting platform (12) having a workpiece mounting surface (11), and the conveying surface (7) of the conveying device (2) and the workpiece. A lifting platform (12) configured to reciprocate between a first position where the mounting surface (11) is at the same height and a second position higher than the first position, and a lifting platform (12) When the first urging means (13) for urging the plate and the lifting platform (12) are in the first position, the workpiece (W) on the workpiece placement surface (11) is positioned in the conveying direction (A). Fixedly attached to the workpiece positioning means (14) and the upper die (5) moving up and down of the press working device (3) When the upper die (5) is lowered, the elevator (12) is pressed to the first position, and when the upper die (5) is raised, the elevator (12) is released. Provided is a workpiece separating device including pressing means (15) that allows movement to a second position.

  According to the present invention, the pressing means can move together with the upper die of the press working apparatus to hold the lifting platform, and the lifting platform is lifted upward by releasing the strain energy stored in the first biasing means. Therefore, no power source such as an air cylinder is required for the vertical movement of the lifting platform, and it is not necessary to control the timing of the lifting platform movement, etc., and the workpiece can be separated with a simple configuration. It becomes possible.

  Further, for example, even when the feed bar device is attached to the lower mold at the level of the second position of the lifting platform, the installation level of the transport device is located below the second position, so the lower mold can be replaced or When the food bar device does not interfere with the transport device when it must be pulled out for maintenance or the like, the lower mold can be pulled out without shifting or removing the transport device.

  In the invention described in claim 2, the work positioning means (14) protrudes on the work placement surface (11) of the lift (12) when the lift (12) is in the first position. When the lifting platform (12) is in the second position, it does not protrude from the workpiece placement surface (11). Thus, the work positioning means does not become an obstacle when the lifting platform is at the second position and the feed bar device approaches the work, for example.

  In the invention described in claim 3, the press working device (3) includes a feed bar device (6) that holds the workpiece (W) and conveys the work (W) to the inside of the press working device (3). ) Is in the second position, the second position is set so that the feed bar device (6) can grip the workpiece (W) on the workpiece placement surface (11) of the lifting platform (12). According to this, it becomes possible to easily deliver the workpiece to the feed bar device.

  In the invention described in claim 4, the lifting platform (12) has a side surface extending in a direction crossing the transport direction (A), and when the lifting platform (12) is detached from the first position, the lifting platform (12 ) Prevents the leading work (W) from moving forward on the transfer surface (7) of the transfer device (2). According to this, it is possible to prevent a series of workpieces from moving forward when the separation table is detached from the first position without adding a special component.

  In the invention described in claim 5, the work separating apparatus further includes second urging means (19) for urging the pressing means (15) downward, and the pressing means (15) is an upper die. The second urging means (19) is attached to the lifting / lowering base (12) elastically by the pressing means (15). A force larger than that of the first urging means (13) is generated so as to be held at one position. According to this, for example, the separation table can be reliably positioned at the first position without being affected by the manufacturing error of the length of the pressing means. Moreover, it becomes possible to lengthen the holding time in the 1st position of a raising / lowering stand (12), the work moving time from a conveying apparatus (2) to a workpiece mounting surface (11) can be ensured, and without stopping | fastening a type | mold. It becomes possible to move continuously.

  In the invention described in claim 6, the work separating device is accommodated in the lifting platform (12), and the third urging means for applying a force against the second urging means (19) to the pressing means (15). (22) is further provided, and the third biasing means (22) is configured so that the pressing means (15) elastically presses the lifting platform (12) and holds it in the first position. A force larger than that of the biasing means (13) is generated. This makes it less susceptible to manufacturing errors than the invention described in claim 5, and makes it possible to further increase the holding time of the lifting platform (12) at the first position. .

  In the invention described in claim 7, the lifting platform (12) regulates the position in the direction perpendicular to the conveying direction (A) of the work (W) on the work placement surface (11) and the position in the vertical direction. A work guide (23) is provided. According to this, even if a force due to vibration or the like acts on the workpiece during the movement of the lifting platform, the workpiece does not shift from a predetermined position.

  In the invention described in claim 8, the lifting platform (12) includes a magnet (24) for attracting and holding the workpiece (W) on the workpiece placement surface (11). According to this, even if a force due to vibration or the like acts on the workpiece during the movement of the lifting platform, the workpiece does not shift from a predetermined position.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows typically the workpiece separation apparatus by 1st Embodiment of this invention, the related conveying apparatus, and a press processing apparatus, In this figure, a workpiece separation apparatus is shown by a cross section and the raising / lowering stand is a low position. In the first position. It is a figure which shows the state which has the raising / lowering stand of the workpiece | work separation apparatus of FIG. 1 in the 2nd high position. It is a front view which shows typically the workpiece separation apparatus by 2nd Embodiment of this invention, the related conveying apparatus, and a press work apparatus, In this figure, the workpiece separation apparatus 1 is shown with a cross section, and the raising / lowering stand is a low position. In the first position. It is a figure which shows the state which has the raising / lowering stand of the workpiece | work separation apparatus of FIG. 3 in a high 2nd position. It is a front view which shows typically the workpiece separation apparatus by 3rd Embodiment of this invention, a related conveying apparatus, and a press processing apparatus, In this figure, the workpiece separation apparatus 1 is shown with a cross section, The raising / lowering stand is a low position. In the first position. It is a figure which shows the state which has the raising / lowering stand of the workpiece | work separation apparatus of FIG. 5 in a high 2nd position. It is the typical side view which looked at the lifting platform of the workpiece separation apparatus by 4th Embodiment of this invention, the related conveying apparatus, a feed bar, etc. from the workpiece conveyance direction. It is typical front sectional drawing of the raising / lowering stand of a workpiece | work separation apparatus by 5th Embodiment of this invention, and a related conveying apparatus.

  Hereinafter, a workpiece separating apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view schematically showing a workpiece separating device 1 and a conveying device 2 and a press working device 3 related to the workpiece separating device 1, and in this drawing, the workpiece separating device 1 is shown in cross section. The workpiece W is a flat blank plate material, and a large number of workpieces W are arranged in a line on the transport surface 7 of the transport device 2.

  A press working apparatus 3 shown in FIG. 1 is a normal transfer press machine 3 having a plurality of processing stations (not shown). The press working apparatus 3 includes a fixed lower mold 4, an upper mold 5 movable up and down, and a workpiece W. It has a general feed bar 6 that moves forward from the left to the right in the figure. Although only one feed bar 6 is shown in the drawing, two feed bars 6 are provided symmetrically with respect to the conveyance axis of the workpiece W extending along the conveyance direction A, and each feed bar 6 grips the workpiece W. Fingers (not shown). The feed bar 6 shown in FIG. 1 is illustrated so as to perform a four-stage movement in a plane orthogonal to the press direction, such as gripping the workpiece W, moving forward to the right, releasing the workpiece W, and moving backward to the left. It is driven by a drive device that is not.

  1 is a general belt conveyor 2, and a series of workpieces W aligned on the conveyance surface 7 are conveyed from the left to the right in the drawing in the conveyance direction A, and a workpiece separation device is provided at the downstream end thereof. It is always supplied without stopping during the press working process. Further, the conveying surface 7 of the belt conveyor 2 is disposed below the feed bar 6 or the dividing surface of the upper mold 5 and the lower mold 4.

  The workpiece separating apparatus 1 according to the first embodiment includes a lifting platform 12 having a workpiece mounting surface 11, a first spring 13 in the form of a compression coil spring that can lift the lifting platform 12 by urging the lifting platform 12, and a workpiece. A workpiece positioning pin 14 for positioning W in the transport direction, a pressing pin 15 for pressing the lifting platform 12, a base plate 16, and a pressing pin fixture 17 for fixing the upper end of the pressing pin 15 to the upper mold 5 are provided. is doing. The base plate 16 is fixed to a fixed base 8 independent of the lower mold 4 (the base plate 16 may be fixed to the lower mold 4 as in FIGS. 3 and 4).

  The lifting platform 12 is formed in a substantially rectangular parallelepiped block shape, and the workpiece placement surface 11 on the upper surface thereof is set to a size on which only one workpiece W is placed. In addition, a spring housing recess 18 in which the first spring 13 is housed and a through hole through which the work positioning pin 14 passes are provided. The elevator 12 is guided by a guide rail (not shown) so that it can smoothly move up and down between a first position at a low position shown in FIG. 1 and a second position at a high position shown in FIG. ing.

  The first position of the lifting platform 12 is a position where the workpiece placement surface 11 is at the same height as the transport surface 7 of the belt conveyor 2. At this time, the lifting platform 12 has its bottom surface in contact with the upper surface of the foundation plate 16. Positioned. The second position of the lifting platform 12 is a position higher than the first position, and a position where the finger (not shown) of the feed bar 6 can grip the workpiece W on the workpiece placement surface 11, that is, the above-described position of the feed bar 6. The operation plane and the work placement surface 11 are substantially coincident with each other. At this time, the lifting platform 12 is positioned in contact with a stopper (not shown) provided on a guide rail (not shown).

  The first spring 13 is housed in the spring housing recess 18 of the lifting platform 12, its lower end is supported by the base plate 16, and its upper end is in contact with the upper end surface of the spring housing recess 18. On the other hand, an upward biasing force can be applied.

  The work positioning pins 14 are erected on the foundation plate 16 and extend through the relatively front portion of the lifting platform 12 in the vertical direction in order to position the front end of the workpiece on the lifting platform 12. The workpiece positioning pin 14 protrudes from the workpiece placement surface 11 when the lifting platform 12 is in the first position, but the tip does not protrude from the workpiece placement surface 11 when the lifting platform 12 is in the second position. Is set. Although only one workpiece positioning pin 14 is shown in FIGS. 1 and 2, two workpiece positioning pins 14 are actually provided symmetrically with respect to the conveyance axis.

  The upper end of the pressing pin 15 is fixed to the pressing pin fixture 17 fixed to the upper mold 5 and extends vertically downward. When the upper mold 5 is at the lowest position, the tip of the pressing pin 15 is used to lift the lifting platform 12. It has a length that can be pressed to one position.

Next, how the workpiece separating apparatus 1 according to the first embodiment operates will be described.
FIG. 1 shows a state in which the die is closed, that is, a state in which the upper die 5 is in the lowest position. At this time, the feed bar 6 is in a forward position on the right side of the drawing so as not to be caught between the upper die 5 The lifting platform 12 is pressed to the first position by the pressing pin 15, so the first spring 13 is in a compressed state, and the workpiece positioning pin 14 protrudes from the workpiece mounting surface 11. . Further, a single workpiece W is placed on the workpiece placement surface 11 of the lifting platform 12, and this workpiece W is pushed by the succeeding workpiece W, but is prevented from moving forward by the workpiece positioning pin 14, and is conveyed. Positioned in direction A.

  Next, when the one-step processing by the press working device 3 is finished, the upper die 5 and thus the pressing pin 15 starts to rise, and as a result, the lifting platform 12 is also lifted upward by the force of the first spring 13, and thus the lifting platform. One workpiece W on the 12 workpiece placing surfaces 11 is separated upward from the subsequent workpiece W on the conveying surface 7 of the belt conveyor 2. When the elevator 12 reaches the second position, the elevator 12 abuts against a stopper (not shown) and therefore does not move upward, and the tip of the pressing pin 15 starts to move away from the elevator 12 from that time. When the lifting platform 12 begins to rise, the leading workpiece of the series of workpieces W on the conveyor surface 7 of the belt conveyor 2 has its front end touching the side surface of the lifting platform 12 on the belt conveyor 2 side (the left side in the figure). You are prevented from moving forward by touching.

  When the upper die 5 is further raised to reach the highest position shown in FIG. 2, the feed bar 6 is returned to the backward position on the left side of the drawing, and the feed bar 6 is further processed at least at the processing station. In order to hold the workpiece W on the lift 12 together with one workpiece (not shown), the distance between the two is reduced. At this time, since the workpiece positioning pins 14 do not protrude from the workpiece mounting surface 11 of the lifting platform 12, the movement of the feed bar 6 is not hindered.

  Next, the feed bar 6 that grips the workpiece W advances to the right in the drawing, conveys the workpiece W to the first processing station in the mold, releases the workpiece W, and then widens the interval between the two. Retreat from the moving path of the mold 5.

  Next, when the upper mold 5 starts to descend to a certain height, the tip of the pressing pin 15 starts to press the lifting platform 12 at the second position. When the upper die 5 reaches the lowest position shown in FIG. 1, the lifting platform 12 is sandwiched between the pressing pin 15 and the base plate 16 and positioned at the first position, and the workpiece mounting surface 11 of the lifting platform 12 and the belt conveyor 2 are positioned. The heights of the transport surfaces 7 are the same. As a result, the top work of the series of works W on the belt conveyor 2 is removed by moving the side surface of the lift 12 that has been prevented from moving forward, as shown in FIG. The workpiece is moved onto the workpiece placement surface 11 and positioned by the workpiece positioning pins 14.

  In this way, one workpiece W is separated from the series of workpieces W, moved to a position suitable for gripping by the feed bar 6, and the workpiece separating apparatus 1 is operated such that the subsequent workpiece W to be separated is prepared. One cycle is completed.

Next, the workpiece separation apparatus 102 according to the second embodiment will be described with reference to FIGS.
In the workpiece separating device 102 according to the second embodiment, the accuracy of positioning to the first position is increased by expanding the compensation range of the manufacturing error of each member related to the positioning of the lifting platform 12 to the first position. For the purpose of securing the work moving time from the transfer device 2 to the work placement surface 11 by increasing the holding time of the lift 12 at the first position, the pressing pin 15 makes the lift 12 elastic. It has a structure to press. Therefore, the workpiece separating apparatus 102 according to the second embodiment further includes the second spring 19 in the form of a compression coil spring, and the pressing pin 15 is attached to the upper mold 5 so as to be movable up and down. This is different from the workpiece separating apparatus 1. Other configurations are the same as those of the first embodiment except that the base plate 16 is fixed to the lower mold 4.

  In the workpiece separating apparatus 102 according to the second embodiment, a bottomed cylindrical spring storage cylinder 20 that houses the second spring 19 and slidably houses the upper end portion side of the pressing pin 15, and a lid portion 21 that closes it. Is provided. The spring storage cylinder 20 has an inner diameter such that the upper end portion of the pressing pin 15 whose diameter is enlarged is slidable, and a hole through which the pressing pin 15 can be inserted is provided at the lower end portion. The spring storage cylinder 20 is fixed to the upper mold 5 after the second spring 19 is received through the pressing pin 15 and fixed to the lid portion 21.

  Further, the second spring 19 generates a force capable of pressing the lifting platform 12 to the first position via the pressing pin 15 when the upper die 5 is lowered to the lowest position, that is, a force larger than that of the first spring 13. Thus, the spring constant and the deflection are set.

  Since it is configured in this way, for example, the lifting platform 12 can be completely brought into close contact with the base plate 16 without being affected by the manufacturing error of the length of the pressing pin 15, and as a result, The positioning accuracy to one position is improved. Moreover, it becomes possible to lengthen the holding time in the 1st position of the raising / lowering stand 12, the work moving time from the conveying apparatus 2 to the workpiece mounting surface 11 can be ensured, and it moves continuously, without stopping a type | mold. Is possible.

Next, a workpiece separating apparatus 103 according to a third embodiment will be described with reference to FIGS.
The workpiece separating apparatus 103 according to the third embodiment further expands the compensation range of the manufacturing error of each member related to the positioning of the lifting platform 12 to the first position than that of the second embodiment. In order to further secure the work moving time from the transfer device 2 to the work placing surface 11 than that of the second embodiment by lengthening the holding time at the first position, the third in the form of a compression coil spring. A spring 22 is further provided. Other configurations are the same as those of the workpiece separating apparatus 102 of the second embodiment.

  In the workpiece separating apparatus 103 according to the third embodiment, the third spring 22 is applied to the lifting platform 12 so that a force against the second spring 19 can be applied to the lower end of the pressing pin 15 when the upper die 5 is lowered. When the upper die 5 is housed and the upper die 5 is raised, the third spring 22 extends, but its upper end has a length that does not protrude from the work placement surface 11 of the lifting platform 12. Further, the third spring 22 has a spring constant and a deflection so that a larger force than the first spring 13 is generated when the upper die 5 is lowered to the lowest position.

  Next, a workpiece separating apparatus 104 according to the fourth embodiment will be described with reference to FIG. FIG. 7 is a view of the lifting platform 12 and the like viewed from the belt conveyor 2 side in the transport direction when the lifting platform 12 is in the second position, and shows a partial configuration of the workpiece separation device 104.

  The workpiece W shown in FIG. 7 is not a plate-shaped blank plate material described so far, but a stepped cylindrical one, and is an upper main body portion Wa and a lower flange portion having a larger diameter than the main body portion Wa. Wb. Moreover, the workpiece separation apparatus 104 of 4th Embodiment differs from the workpiece separation apparatus of each above-mentioned embodiment by having the two workpiece guides 23 symmetrically on the both sides along the conveyance direction of the raising / lowering stand 12. FIG. .

  Each work guide 23 is formed as a rod-shaped member composed of a vertical portion 23a and a horizontal portion 23b that intersect with each other substantially perpendicularly, and has a dimension that allows the flange portion Wb of the work W to be fit under the horizontal portion 23b. Further, since the main body portion Wa of the workpiece W is positioned between the open ends of the horizontal portions 23b of both the work guides 23, even if vibrations or the like that may occur when the lifting platform 12 is raised or lowered are applied to the workpiece W. The workpiece guide 23 prevents the workpiece W from shifting in the left-right direction in the figure and jumping upward, so that the predetermined position is always maintained. Therefore, the finger 6a of the feed bar 6 can always reliably hold the workpiece W in the second position. Further, since the feed bar 6 grips the main body Wa of the workpiece W with its fingers 6 a and moves forward along the transport direction A, the workpiece W is detached from the workpiece guide 23 and the lifting platform 12.

  Next, a workpiece separating apparatus 105 according to a fifth embodiment will be described with reference to FIG. FIG. 8 is a front view drawn around the lifting platform 12 when the lifting platform 12 is in the second position, and shows a partial configuration of the workpiece separating device 105. It is drawn in cross section.

  The lifting platform 12 of the workpiece separating apparatus 105 according to the fifth embodiment includes a magnet for attracting the workpiece W. The magnet is embedded in the workpiece placement surface 11 so as not to protrude from the workpiece placement surface 11 on the belt conveyor 2 side of the workpiece positioning pin 14. For this reason, even if vibration or the like acts on the workpiece W when the elevator 12 is raised or lowered, the workpiece W is attracted and held by the magnet and does not deviate from a predetermined position.

2 Belt conveyor 3 Press processing device 4 Lower die 5 Upper die 6 Feed bar 12 Separation stand 13 First spring 14 Work positioning pin 15 Pressing pin 16 Base plate W Workpiece

Claims (8)

Work separation device for separating work (W) to be processed by press working device (3) from a series of work (W) aligned and conveyed on a conveyance surface (7) of conveyance device (2) Because
A lift position (12) having a work placement surface (11), a first position where the transport surface (7) of the transport device (2) and the work placement surface (11) are at the same height; A lifting platform (12) configured to reciprocate between a second position higher than the first position;
First urging means (13) for urging the elevator (12) upward;
A workpiece positioning means (14) for positioning the workpiece (W) on the workpiece mounting surface (11) in the conveying direction (A) when the lifting platform (12) is in the first position;
The pressing means (15) fixedly attached to the upper mold (5) moving up and down of the press working device (3) is used, and when the upper mold (5) is lowered, the lifting platform (12) is Pressing means (15) that presses against the first position and releases the lifting platform (12) when the upper mold (5) is raised to allow movement to the second position. Work separation device.   The workpiece positioning means (14) protrudes on the workpiece placement surface (11) of the elevator (12) when the elevator (12) is in the first position. The workpiece separating apparatus according to claim 1, wherein the workpiece separating device does not protrude from the workpiece placing surface (11) when 12) is in the second position. The press working device (3) includes a feed bar device (6) that grips a workpiece (W) and conveys the work (W) to the inside of the press working device (3).
When the lifting platform (12) is in the second position, the feed bar device (6) can grip the workpiece (W) on the placement surface (11) described above of the lifting platform (12). The workpiece separating apparatus according to claim 1, wherein a second position is set. The lifting platform (12) has a side surface extending in a direction crossing the transport direction (A);
When the lifting platform (12) is separated from the first position, the side surface of the lifting platform (12) moves the leading work (W) on the transport surface (7) of the transport device (2). The work separating apparatus according to claim 1, wherein the work separating apparatus is blocked. The work separating apparatus according to any one of claims 1 to 4, further comprising second urging means (19) for urging the pressing means (15) downward.
The pressing means (15) is attached to the upper mold (5) so as to be movable up and down rather than fixedly,
The second urging means (19) includes the first urging means (13) so that the pressing means (15) elastically presses the lifting platform (12) and holds it in the first position. The work separating apparatus according to any one of claims 1 to 4, wherein a larger force is generated. The third urging means (22) that is accommodated in the lifting platform (12) and applies a force to the pressing means (15) to oppose the second urging means (19). The workpiece separating device of
The third urging means (22) includes the first urging means (13) such that the pressing means (15) elastically presses the lifting platform (12) and holds it in the first position. The work separating apparatus according to claim 5, wherein a larger force is generated.   The lifting platform (12) includes a work guide (23) for regulating the position of the work (W) on the work placement surface (11) in the direction orthogonal to the transport direction (A) and the position in the vertical direction. The workpiece separating apparatus according to any one of claims 1 to 6, wherein the workpiece separating apparatus is characterized.   The said lifting platform (12) is provided with the magnet (24) which adsorbs-holds the workpiece | work (W) on the said workpiece | work mounting surface (11), It is any one of Claims 1-7 characterized by the above-mentioned. Work separation device.

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