JP4044787B2 - Blank floating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blank floating device used in a destack feeder. More specifically, the present invention relates to a blank floating device for maintaining a blank in a float state in a destack feeder that supplies blanks one by one to a transfer press or the like.
[0002]
[Prior art]
A general destack feeder has a configuration shown in FIG. 6, for example. The destack feeder 100 includes a main body frame 101, a stack transport device 103 that is provided on the frame and transports a blank stack 102 to a supply position, and a stop plate that can be advanced and retracted to position the stack 102 at the supply position. 104 and a contact plate 105, a lifting device 106 for raising the stack 102 at the supply position, and a floating device 108 for separating the blanks 107 on the upper portion of the lifted stack 102 one by one. Reference numeral 109 denotes a pipe 109 that can be moved up and down by an air cylinder, and a vacuum cup 110 that sucks the upper end blank 107 is attached to the lower end of the pipe 109. Reference numeral 111 denotes a supply device such as a magnet conveyor for supplying the blank 107 pulled up by the vacuum cup 110 to the press.
[0003]
The floating device 108 is arranged such that the magnet separator 112 is applied to the blank 107 at the top of the stack 102 that is lifted by the lift device 106. That is, when the magnetic separator 112 is applied to a plurality of stacked blanks 107, the same magnetic poles are generated on the contact surfaces of the upper and lower blanks 107, thereby separating each other. In that case, if the magnetic separator 112 is applied to only one side of the blank 108, the magnetic separator 112 is separated on the applied side, but is overlapped on the other side, so that it tends to be inclined, and the separation ability is limited. Therefore, a plurality of magnet separators 112 that are in contact with opposite sides so as to sandwich the blank 108 are provided. As a result, the blank 108 floats almost horizontally, and the separation capability is remarkably improved.
[0004]
[Problems to be solved by the invention]
The floating device of the destack feeder has a high blank separation ability, but when an external force is applied to the separated and floating blank, for example, when the vacuum cup 110 sucks the blank, the blank position is shifted. There is. In addition, in the case of a standard blank such as a rectangle or a circle, the blank operates stably, but in the case of a deformed blank, the separated blank may cause load collapse. Then, the collapsed blank 108 may stick to the magnet separator 112 on one side in a vertical direction, for example, and hinder the next blank 108 from being lifted.
[0005]
Conventionally, in order to prevent such collapse of the load, this is dealt with by adjusting the position of the magnet separator. However, there are many types of blanks, and it is difficult and time consuming to find and adjust the most appropriate position for each blank.
[0006]
An object of the present invention is to prevent collapse of the blank in the above conventional floating device, thereby making it easy to adjust the position of the magnet separator.
[0007]
[Means for Solving the Problems]
A blank floating device according to the present invention (Claim 1) is a blank floating device used in a destack feeder for separating one blank at a time from the top of a stack of blanks lifted by a lift device. A magnetic separator disposed on each of two opposing sides of the stack, and a blank support device disposed on two sides around the blank stack where the magnet separator is not provided, the blank support device comprising: A guide member for guiding the blank in the vertical direction in the float region by the magnetic separator, and a support member for attaching the guide member to the frame of the floating device, and the support member is fixed to the frame And the vertical line And freely provided are pivoting portion pivots Ri, the swivel unit comprises a drive means for reciprocating operation, the drive means, said guide member, a guide position for guiding the upper and lower blank float region, It is characterized in Monodea Rukoto to reciprocate between a retracted position where it does not interfere with the blank stacking maximum dimension.
[0008]
A second aspect of the blank floating device of the present invention (Claim 2 ) is a blank floating device used for a destack feeder, wherein a plurality of magnet separators arranged around the blank, and the periphery of the blank, A blank support device disposed in a portion where no magnet separator is provided, and the blank support device guides the blank in a vertical direction in a float region by the magnet separator, and the guide member is a floating device. A support member for mounting to the frame, the support member fixed to the frame, a guide member relative to the base, a guide position for guiding the blank up and down in the float region, and a blank Horizontal direction between the retracted position without interference A traveling unit that is supported so as to travel freely, a driving means for reciprocating the traveling unit, a swivel unit that is pivotable about a vertical line with respect to the base, and a reciprocating operation for the swivel unit And a driving means .
In any case before reporting, the guide member is preferably removably attached to the support member (claim 3).
Further, a plurality of the magnet separators are respectively arranged on the front and rear beams of the frame corresponding to the two opposite sides of the stack, and can be moved back and forth by a driving device between a position contacting the blank and a position retracting. In addition, it is preferable that the magnetic separator drive device stored in advance according to the blank is operated (Claim 4 ).
The destack feeder of the present invention (Claim 5 ) includes a lift device for lifting a stack of blanks, a blank floating device having any one of the swivelable magnetic separators, and a blank remaining on the lift device. A material holding device for supporting and exchanging with the next stack, and the material holding device includes a telescopic fork provided adjacent to the magnet separator on the front and rear beams of the frame. It is characterized by having.
[0009]
[Operation and effect of the invention]
The blank floating device of the present invention (Claim 1) is configured so that a floating blank is separated on the other two sides by magnetic separators arranged respectively on two opposite sides of the blank stack in the floating region. The arranged guide member guides in the vertical direction. Therefore, when a blank is sucked and lifted with a vacuum cup or the like, the movement of the vacuum cup does not interfere with the movement even when the vacuum cup is lowered while pushing down the uppermost blank or when the sucked blank is lifted. At that time, the second and subsequent blanks are once pushed down and then raised so as to bounce, but they are guided by the magnet separator and the guide member, so that they do not shift back and forth and to the side. Therefore, the blank does not collapse. Furthermore, since the blank load can be prevented from collapsing with the blank support device, the position of the magnetic separator can be easily adjusted.
[0010]
Furthermore, since the support member includes a drive device that moves the guide member between a guide position for guiding the blank and a retracted position that does not interfere with the blank having the maximum loading dimension, a guide action is required depending on the shape of the blank. If it is not necessary, it can be moved to the guide position, and if not required, it can be moved to the retracted position, so that an appropriate guide action can be performed for each blank.
[0011]
The support member further includes a fixed portion fixed to the frame of the destack feeder, and a swivel portion provided so as to be rotatable around a vertical line with respect to the fixed portion. since a reciprocating turning operation the parts, even when the amount of movement of the drive motion means (stroke length) is small, it is possible to move the guide member increases. For this reason, it is sufficiently separated from the blank at the retracted position, whereby interference with the blank can be more reliably prevented when the guide action is unnecessary.
[0012]
The blank floating device of the present invention (Claim 2 ) can greatly move the guide member while maintaining the same posture of the guide member. This facilitates adjustment of the position and angle of the guide member when moved to the guide state. Since further the are combined with the supporting member of the above pivoting, easily avoiding interference with the surrounding device when pivoting.
[0013]
When the guide member is detachably attached to the support member (Claim 3 ), a guide member in a form that matches the shape of the blank is prepared in advance, and the guide member is changed when the workpiece to be pressed is changed. Just replace it. Therefore, the setup work becomes easy and the setup work can be performed in a short time.
A plurality of the magnetic separators are respectively arranged on the front and rear beams of the frame corresponding to the two opposite sides of the stack, and can be moved back and forth by a driving device between a position contacting the blank and a position retracting. In the case where the magnetic separator driving device stored in advance according to the blank is operated (Claim 4) , the setup work is facilitated when the product to be pressed changes.
Since the destack feeder of the present invention (Claim 5 ) includes the above-described blank floating device, the setup work is easy. Moreover, since the material holding device provided with the extendable fork is provided, the exchange of the stack is easy.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a blank floating device (hereinafter simply referred to as a floating device) of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an essential part showing an embodiment of a floating device of the present invention, FIG. 2 is a schematic plan view showing the whole of the floating device, and FIG. 3 is a blank support device used in the floating device (hereinafter referred to as the following). 4a is a side view of the support device, FIG. 4b is a cross-sectional view taken along the line IV-IV of FIG. 4a, and FIGS. 5a and 5b are partial cutouts of guide members according to the present invention. It is a top view and a side view.
[0015]
First, the entire floating device will be described with reference to FIG. The floating device 10 in FIG. 2 includes a rectangular frame 11, a magnet separator 15 that is attached to the beams 12 and 13 on the front and rear of the frame 11 via a driving device 14, and a support that is attached to the left and right beams 16 and 16. The devices 18 and 18 are configured. This floating device 10 is, for example, a state where the floating device 108 of the destack feeder 100 of FIG. 6 is viewed from above, and the lower side of FIG. That is, the upper side of FIG. 2 is the direction of supply to the press. However, in FIG. 2, the stack conveying device and the supply device to the press are omitted. Reference numeral B in FIG. 2 is a blank, and reference numeral L is a comb-like support member that supports the blank of the lift device. Mx represents the maximum blank that can be loaded.
[0016]
As shown in detail in FIG. 1, the front and rear beams 12 and 13 of the frame 11 are respectively attached to the inner surfaces of the upper ends of the four columns 21 rising from the lower structure of the destack feeder. Are attached to the upper surfaces of the left and right ends of the front and rear beams 12, 13 (see FIG. 4a). The magnet separator drive device 14 includes a base portion 22 fixed to the beams 12 and 13 and an extendable rod 23 provided on the base portion 22 so as to be movable back and forth. A bracket 24 is attached to the tip of the telescopic rod 23, and a head portion 25 to which the magnet separator 15 is attached is attached to the bracket 24. In order to match the shape of the blank, the head portion 25 is supported around the vertical support shaft 25a so as to be rotatable about ± 25 degrees, for example (see imaginary line P). The telescopic rod 23 is driven by, for example, a hydraulic cylinder, and moves forward until the touch switch provided on the head unit 25 comes into contact with the blank B, and automatically retracts when the material runs out.
[0017]
The front beam 12 is provided with a material holding device 27 called an auto fork adjacent to the magnet separator 15. The material holding device 27 includes a retractable fork 27a. A guide portion 28 that receives the tip of the fork 27 a is attached to the rear beam 13. The material holding device 27 and the guide portion 28 support the remaining material on the lift device, and in the meantime, the stack of the lift device can be exchanged with the next stack. Thereby, the material supply by the destack feeder can be continued during the material exchange.
[0018]
The support device 18 includes a shift mechanism 30, a turning mechanism 40 supported by the shift mechanism, and a guide member 50 that is detachably attached to a free end of the turning mechanism. The shift mechanism 30 includes a base plate 31 attached to the left and right beams 16 in the longitudinal direction, a slider 32 provided on the base plate so as to be movable in the front-rear direction, and a slide cylinder 33 for driving the slider back and forth. It has.
[0019]
As shown in FIGS. 4 a and 4 b, a guide rail 34 of the linear guide mechanism and a roller rail 35 having a U-shaped cross section are fixed to the upper surface of the base plate 31. On the back surface of the slider 32, front and rear linear bearings 36 that run while being fitted to the guide rail 34 and front and rear rollers 37 and 37 that roll in the rail 35 are attached. As the linear bearing 36, for example, a ball bearing type linear motion guide such as an LM guide manufactured by THK, or one using a needle bearing is used. The roller 37 is rotatably attached to a mounting plate 38 fixed to the back surface of the slider 32 with a pin. The aforementioned cylinder 33 is attached to the rear portion of the base plate 31, and the tip of the piston rod 39 is rotatably connected to the end portion of the attachment plate 38 by a pin 39a. Thereby, the slider 32 is reciprocated back and forth according to the expansion and contraction of the piston rod 39. At that time, since the roller 37 is sandwiched between the lower plate 35a and the upper plate 35b of the guide rail 35, the slider 32 travels stably.
[0020]
As shown in FIG. 3, the turning mechanism 40 includes an arm 42 that is provided so as to be rotatable around a vertical axis by a support pin 41 provided somewhat inside the vicinity of the tip of the slider 32, and a pin 43 provided on the rear side of the slider 32. And a turning cylinder 44 provided so as to be rotatable around a vertical axis. When the piston rod 45 of the turning cylinder 44 expands and contracts, the arm 42 reciprocates approximately 90 degrees as indicated by an imaginary line. At that time, the cylinder 44 is also rotated by the pin 43.
[0021]
For example, a trunnion type cylinder is used as the shift cylinder 33 and the turning cylinder 44. Since the load is heavy, a hydraulic cylinder is usually used. However, an air cylinder with a brake may be used. Further, a reciprocating linear motion device using a drive source such as an electric motor and a mechanism for converting rotation of a rack and pinion to straight travel may be used. Further, a mechanism that is driven by manual operation such as a handle or a lever may be used. As shown in FIGS. 3 and 4 a, the turning cylinder 44 is attached to the slider 32 with a U-shaped bracket 46 with the trunnion pin 43 facing up and down. In addition, the code | symbols 47 and 48 of FIG. 3 and FIG. 4a are the cable bear and cable bear receptacle which hold | maintain an electric wire and a hose, respectively.
[0022]
Returning to FIG. 3, a block-shaped guide attachment portion 51 is fixed to the tip of the arm 42, and the above-described guide member 50 is detachably attached to the guide attachment portion 51. Engagement pins 52 extending in the left-right direction protrude from the base of the guide attachment portion 51, and a sensor 53 such as a limit switch or a proximity switch for detecting the attachment / detachment state of the guide member 52 is provided.
[0023]
As shown in FIGS. 5a and 5b, the guide member 50 includes a main body including a U-shaped fitting base portion 54 in plan view and a support bar 55 extending from the front end thereof, and a screw 56 at the tip of the support bar. It consists of the guide piece 57 fixed by. The fitting base portion 54 is a box-shaped member whose lower surface side and rear portion are open. The inner surfaces of the left and right walls 54 a and 54 b of the fitting base 54 are fitted with the left and right outer surfaces of the guide mounting portion 51. The upper wall 54 c is a portion that comes into contact with the upper surface of the guide attachment portion 51. Left and right walls 54a, the rear portion of the 54b, the left right positioning plates 59 and 60 that have a U-shaped groove 58 which engages with the engaging pin 52 of the guide mounting portion is attached with screws.
[0024]
Reference numeral 63 in FIG. 5 denotes a plunger threadably engaged with female screws formed on the left and right walls 54a and 54b. The plunger 63 is provided with a ball that can be moved in and out at the tip and is urged by a spring in the direction of exit. And the ball | bowl of the front-end | tip of the plunger 63 contact | abuts to the side surface of the guide attachment part 51, or it engages with the recessed part formed in the side surface, and there exists an effect | action which hold | maintains the guide member 50 elastically to a guide attachment part. U-shaped notches 61 larger than the engaging pins 52 are formed in corresponding portions of the left and right walls 54a and 54b. An operation piece 62 for operating the above-described sensor 53 protrudes from the rear portion of one positioning plate 59. Instead of the plunger 63, it may be tightened with a simple screw.
[0025]
The fitting base 54 is manufactured in accordance with the guide mounting portion 51 so that various guide members 50 can be exchanged. The guide piece 57 selects an appropriate shape according to the shape of the blank or the like. The left and right walls 54a, on the outer surface of the 54b recess for ball and mating the tip of the plunger 63 is formed. In the guide member 50 of FIG. 5, the guide piece 57 includes an attachment portion 65 in which a long hole 64 through which the screw 56 is passed is formed, and a guide portion 66 that is provided at the tip and extends vertically. The attachment portion 65 is attached to the upper surface of the support bar 55 of the main body by two screws 56 so that the position thereof can be adjusted. Since the guide part 66 guides when a blank rising from below or a blank that has risen too much descends, the lower part and the upper part are tapered.
[0026]
In order to attach the guide member 50 to the guide attachment portion 51 of the arm 42, the walls 54 a, 54 b, 54 c of the fitting base 54 are moved rearward while sliding against the outer surface of the guide attachment portion 51. As a result, the engaging pin 52 enters the U groove 58 and cannot move up and down. Further, since the ball at the tip of the plunger 63 is elastically fitted into the concave portion on the side surface of the guide mounting portion 51, the ball hardly moves to the front side. Thereby, the fixing operation is completed. When the guide member 50 is removed, the guide member 50 may be pulled out straight forward. Thus, the replacement of the guide member 50 can be easily performed in a short time. When a screw is used instead of the plunger 63, the screw is fixed or released by tightening or loosening the screw.
[0027]
Next, the operation of the floating device 10 configured as described above will be described with reference to FIGS. 1 and 2. When the product to be pressed changes, the destack feeder is set up in parallel with the work mold. When the lift device is raised and the first stack of blanks enters the area of the floating device 10, several previously stored drive devices 14 of the magnetic separator 15 are activated, the rod 23 extends, and the sensor Stop when blank B is detected. The head portion 25 that holds the magnet separator 15 is inclined according to the angle of the side surface of the blank B as indicated by the imaginary line P. When the magnetic separator 15 contacts the side edge of the blank B, the blanks B repel each other and are separated one by one.
[0028]
Subsequently, the shift mechanism 30 of the support device 18 is operated, and the slider 32 moves in the front-rear direction (the direction in which the left and right beams 16 extend) by a predetermined amount. Further, the arm 42 is rotated by the turning mechanism 40, and the guide portion 66 of the guide member 50 contacts the blank B. A sensor for detecting that the guide member 50 is in contact with the blank may be provided so that the rotation is stopped when the guide member 50 is in contact with the blank.
[0029]
In this embodiment, the blank B has an elongated trapezoidal shape, and the magnet separator 15 is in contact with the side corresponding to the long leg of the trapezoid. In that case, the blank B does not shift to the left side of FIG. 2, but may shift to the right side. Therefore, the guide member 50 is in contact with the sides corresponding to the upper and lower bases of the elongated trapezoid. As a result, the blank B is surrounded by, for example, two pairs of front and rear magnet separators 15 and left and right guide members 50, and does not collapse even when an external force is applied, such as when attracted by a vacuum cup. Moreover, even if the next blank sticks to the uppermost blank adsorbed by the vacuum cup and rises, even if it falls on the way, it returns to the original position accurately. Therefore, the position of the magnet separator 15 may be adjusted roughly, and the adjustment work is simplified.
[0030]
The support device 18 is a cylinder arranged at right angles to the left and right beams 16 in the same manner as the hydraulic cylinder of the driving device 14 of the magnet separator 15 instead of the shift cylinder 33 and the turning cylinder 44. It is also possible to employ the guide member 50 so that the guide member 50 advances and retreats straight with respect to the blank B. However, in this embodiment, a shift cylinder 33 and a turning cylinder 44 are disposed along the left and right beams 16, and the slider 32 reciprocates in the longitudinal direction of the beam 16 to move the arm 42 between the guide position and the avoidance position. I try to swivel between. For this reason, the floating device 10 hardly protrudes to the outside, neither the moving part nor the fixed part. Therefore, the operator can easily access the destack feeder.
[0031]
Moreover, in the said embodiment, since the turning mechanism 40 and the shift mechanism 30 are provided, even when the shape of a blank changes significantly, it can respond. Further, the guide member can be moved while avoiding surrounding devices. However, when there is little possibility of interference with the apparatus in the surroundings or when the shape of the blank does not change greatly, the shift mechanism 30 can be omitted and only the turning mechanism 40 can be provided. In some cases, the turning mechanism may be omitted and only the shift mechanism may be provided. In that case, the moving direction of the guide member by the shift mechanism may be an oblique direction in the horizontal plane so as to approach the oblique direction with respect to the blank, for example.
[0032]
In the above-described embodiment, the guide portion 66 of the guide member 50 merely has a guide action in the vertical direction. However, depending on the blank, a magnet separator may be provided instead of the guide member 50. In that case, a separating action can be achieved even at the left and right parts of the blank.
[Brief description of the drawings]
FIG. 1 is a plan view of an essential part showing an embodiment of a floating device of the present invention.
FIG. 2 is a schematic plan view showing the entire floating device.
FIG. 3 is a plan view of a blank support device used in the floating device.
4A is a side view of the support device, and FIG. 4B is a cross-sectional view taken along line IV-IV in FIG. 4A.
[5] Figures 5a and 5b are plan view and a side view partially broken away of Ruga id member involved in the present invention, respectively.
FIG. 6 is a side view of a general destack feeder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Floating device 11 Frames 12 and 13 Front and rear beams 14 Drive device 15 Magnet floater 16 Left and right beams 18 Support device B Blank 21 Column 22 Base portion 23 Extendable rod 24 Bracket 25 Head portion 25a Support shaft 27 Material hold device 28 Guide portion 30 Shift mechanism 31 Base plate 32 Slider 33 Shift cylinder 34 Guide rail 35 Rail 36 Linear bearing 37 Roller 38 Mounting plate 39 Piston rod 39a Pin 40 Turning mechanism 41 Support pin 42 Arm 43 Pin 44 Turning cylinder 45 Piston rod 50 Guide member 51 Guide mounting portion 52 Pin 53 Sensor 54 Fitting base portions 54a, 54b Left and right walls 54c Upper wall 55 Support rod 56 Screw 58 U groove 59, 60 Positioning plate 61 Notch 6 2 Actuating piece 63 Plunger 64 Long hole 65 Mounting portion 66 Guide portion 67 Screw

Claims (5)

A blank floating device used in a destack feeder for separating blanks at the top of a stack of blanks lifted by a lift device one by one,
A magnetic separator disposed on each of two opposite sides of the blank stack;
A blank support device disposed on two sides around the stack of blanks where the magnet separator is not provided,
The blank support device includes a guide member that guides the blank in a vertical direction in a float region by a magnetic separator, and a support member for attaching the guide member to the frame of the floating device,
The support member includes a fixed part fixed to the frame, a turning part provided to be rotatable around a vertical line with respect to the fixed part, and drive means for reciprocating the turning part.
The drive means, said guide member, Monodea Ru blank floating device for reciprocating between a guide position for guiding the upper and lower blank float region, and a retracted position where it does not interfere with the blank stacking maximum dimension. A blank floating device used in a destack feeder,
A plurality of magnetic separators arranged around the blank;
A blank support device is provided around the blank and disposed in a portion where the magnet separator is not provided.
The blank support device includes a guide member that guides the blank in a vertical direction in a float region by a magnetic separator, and a support member for attaching the guide member to the frame of the floating device,
The support member can run in the horizontal direction between a base fixed to the frame, a guide member relative to the base, and a guide position for guiding the blank up and down in the float region and a retracted position that does not interfere with the blank. A driving unit for supporting, and a driving means for reciprocating the traveling unit ;
It said base with respect to a pivot portion provided pivotably around a vertical line, they lube ranked floating device and drive means for reciprocally operating the swivel part. 3. The blank floating device according to claim 1, wherein the guide member is detachably attached to the support member. A plurality of the magnetic separators are respectively arranged on the front and rear beams of the frame corresponding to the two opposite sides of the stack, and can be moved back and forth by a driving device between a position contacting the blank and a position retracting. cage, and a blank floating apparatus according to claim 1, wherein the driving device of the magnet separator is intended to operate which has been stored in advance in accordance with the blank. A lift device for lifting a stack of blanks, a blank floating device according to claim 4 , and a material holding device for supporting a blank remaining on the lift device so that it can be replaced with the next stack. ,
The destack feeder, wherein the material holding device includes a telescopic fork provided adjacent to the magnet separator on the front and rear beams of the frame.

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