JP2004337953A - Press transfer equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structurally simplified press transfer equipment which can carry works quickly and reliably, while eliminating a driving power source dedicated for transferring and clamping and a detecting unit for confirmation of motions. <P>SOLUTION: Repetitive transfers of a plurality of work W to be fed to the metal die processing position are composed to be structurally synchronous with processing motions of a press machine M and reciprocative linear movements and open/close motions of a plurality of clamp arms 32A, 32B which are executed by interactions of synchronous and relative, linear reciprocative movements of a pair of feed bars 4A, 4B and clamp bars 5A, 5B extended to access a metal die inside, utilizing driving force of the press machine M, so that the driving power source dedicated for transferring and clamping and the detecting unit for motion confirmation can be eliminated. In this manner, the equipment is structurally simplified and quick and reliable transfer is achieved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a press transfer apparatus that sequentially transports a plurality of supply works onto a die of a press machine using a pair of transfer bars arranged in parallel.
[0002]
[Prior art]
As a press transfer device in the prior art, one end of a link is connected to the tip of a pair of feed bars arranged side by side with a pin, and the other end of the link is connected to a first arm fixed to the shaft of a feed drive servomotor. Then, the first arm is swung by a predetermined angle to give a feed motion to the pair of feed bars, and the middle of the second arm is attached to the axis of the clamp driving servomotor provided between the feed bars at both ends of the pair of feed bars. A clamp operation in which a pair of feed bars are fixedly provided at both ends of the second arm so as to be movable in the feed direction, and a distance between the pair of feed bars is reduced or expanded by the swinging motion of the second arm by a clamp driving servomotor. And a technique of sequentially transporting a work onto a die of a press machine by a feed operation by the feed drive servo motor. Are (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-9-10866 (paragraphs 0008 and 0009, FIG. 1)
[0004]
[Problems to be solved by the invention]
By the way, the above-mentioned conventional press transfer device uses a pair of feed bars to sequentially convey a work onto a die of a press machine, so that a feed motion and a clamp / unclamp motion are applied to the pair of feed bars. , Two servo motors are used.
[0005]
Therefore, by using two servo motors for the feed motion and the clamp / unclamp motion for a pair of feed bars, it is possible to control the speed appropriately, but an extra drive source is required and these independent motions are synchronized. In addition to the need for a control device and a sensor to check the position, it is necessary to synchronize the processing operation and the feed operation of the press machine, so the setting of many peripheral devices and the response control with these It had a problem that became complicated.
[0006]
Accordingly, an object of the present invention is to eliminate a drive source dedicated to conveyance and clamping and a detection device for operation confirmation, and to provide a mechanically simplified press capable of quick and reliable conveyance. It is to provide a transfer device.
[0007]
[Means for solving the problem]
In order to achieve the above object, the present invention has the following technical means. That is, by using the reference numerals used in the accompanying drawings corresponding to the embodiment, a plurality of supply works W are sequentially placed on a die of the press machine M using a pair of transfer bars TB1 and TB2 arranged in parallel. In the press transfer device for transporting, the transfer bars TB1 and TB2 are vertically supported by a driving mechanism D provided on the rear end side so as to be able to rectilinearly reciprocate, and are guided and supported on a base 26, and the front end side is formed of the metal. It comprises a pair of feed bars 4A, 4B and a pair of clamp bars 5A, 5B extending toward the inside of the mold. At the distal ends of the transfer bars TB1, TB2, the clamp bars 5A, 5B and the feed bars 4A, 4B are provided. The longitudinal and longitudinal movements of the longitudinal movement are performed by the synchronous and relative reciprocating rectilinear movement of It has a clamp mechanism 28 in which a plurality of clamp claws 32A, 32B are arranged to face each other at intervals. The drive mechanism 28 is separated and fixed on the cam shafts 10A, 12A which are rotationally driven by the driving force of the press machine M. The pair of drum cams 10 and 12 provided are engaged with the rear ends of the feed bars 4A and 4B and the clamp bars 5A and 5B to rotate the pair of drum cams 10 and 12 differently. A press transfer device comprising a pair of levers provided with conversion means C1 and C2 for converting a swing angle into a swing operation.
According to the above, when the pair of drum cams 10 and 12 are driven to rotate by the activation of the press machine M, the drum cams 10 and 12 are vertically guided and supported so as to be able to reciprocate linearly and extend so that the front ends face the inside of the mold. Transfer bars TB1 and TB2 comprising a pair of feed bars 4A and 4B and clamp bars 5A and 5B are fed by a pair of levers 14 and 15 which swing at different swing angles via a pair of conversion means C1 and C2. 4A, 4B and the clamp bars 5A, 5B are synchronously and relatively rectilinearly reciprocated, and are perpendicular to the reciprocating rectilinear movement of the plurality of clamp claws 32A, 32B arranged at predetermined intervals in the longitudinal direction. An opening and closing operation is performed.
Therefore, a pair of feed bars 4A and 4B extended to face the inside of the mold using the driving force of the press machine M and the interaction of the synchronous and relative rectilinear reciprocating movement of the clamp bars 5A and 5B, The reciprocating rectilinear movement and opening / closing operation of the plurality of clamp claws 32A and 32B and the repetitive conveyance of the plurality of workpieces W to the die machining position mechanically synchronized with the machining operation of the press machine M make it possible to provide a drive source dedicated to conveyance and clamping. By omitting the detection device for confirming the operation, it is possible to simplify the mechanism mechanically, and it is possible to convey quickly and reliably.
[0008]
In the present invention, the pair of levers 14, 15 includes a feed lever 14 engaging with the feed bars 4A, 4B and a clamp lever 15 engaging with the clamp bars 5A, 5B. The lever 15 opens and closes the clamp claws 32A and 32B using the swing angle difference between the levers 14 and 15 at the start of the synchronized forward and reverse swing. A press transfer device characterized in that the clamp mechanism 28 is conveyed to a die processing position repeatedly at predetermined intervals in synchronism with the processing operation of the press machine M.
According to the above, the feed lever 14 and the clamp lever 15 perform the opening and closing operation of the clamp claws by using the swing angle difference between the two levers at the start of the synchronized forward / reverse swing. Each work W is repeatedly conveyed to the processing position of the die at predetermined intervals in synchronization with the processing operation of the press machine M in the synchronous swing range.
Therefore, the clamp operation and the release operation of the clamp claws 32A and 32B are performed by utilizing the swing angle difference between the levers 14 and 15 at the time of starting the conveyance and the time of retreat when the plurality of works W are repeatedly conveyed forward and backward at predetermined intervals. It can be given quickly and reliably.
[0009]
Further, in the present invention, the clamp mechanism 28 comprises a pair of frames 30A, 30B disposed in parallel near both outer surfaces of the ends of the transfer bars TB1, TB2, and a tip holding portion H1 between the two frames 30A, 30B. , H2 are arranged at predetermined intervals so as to face each other, and a plurality of clamp arms 32A, 32B guided and supported so as to be able to advance and retreat in a direction perpendicular to the pair of feed bars 4A, 4B, and the two frames 30A, 30B. A pair of operating pins 34A, 34B projecting inward from the front and rear and being guided and supported so as to be able to advance and retreat in a direction perpendicular to the upper and lower feed bars 4A, 4B and the clamp bars 5A, 5B. Of the pair of operating pins 34A and 34B, and the front and back of the pair of clamp bars 5A and 5B support surfaces are inserted in the front and rear directions in the transport direction to fit the lower ends of the pair of operating pins 34A and 34B. A pair of left and right inclined grooves 38 inclined at a predetermined inclination angle in a plan view with respect to the direction are formed symmetrically, and correspond to the pair of inclined grooves 38 so as to fit upper ends of the pair of operating pins 34A and 34B. The pair of feed bars 4A, 4B are formed with a pair of oblong grooves 40 formed on the support surfaces thereof at right angles to the straight traveling direction, and the pair of clamp bars 5A, 5B and the pair of feed bars 4A, 4B are relatively moved back and forth. The clamp pawls 32A, 32B are opened and closed via the operating pins 34A, 34B fitted in the inclined grooves 38 of the pair, and the pair of clamp bars 5A, 5B and the pair of feed bars 4A, 4B are synchronously moved back and forth. The clamp arms 32A and 32B are configured to move back and forth through the operation pins located at any one end of the pair of horizontally long grooves 40 by the movement. It is a press transfer apparatus.
According to the above, when the pair of left and right feed bars 4A, 4B and the clamp bars 5A, 5B, which are vertically overlapped, perform relative reciprocating rectilinear movement, they are fitted into the symmetrically formed pair of left and right inclined grooves. When the clamp claws 32A, 32B are opened and closed via the pair of operating pins 34A, 34B, and the pair of left and right feed bars 4A, 4B and the clamp bars 5A, 5B perform reciprocating linear movement in synchronization with each other, the pair of laterally elongated grooves 40 are formed. The clamp claws 32A, 32B are moved back and forth through the operation pins 34A, 34B located at any one of the ends.
Therefore, the clamp mechanism 28 is capable of opening / closing the pair of clamp claws 32A, 32B and reciprocating straight at the time of opening / closing only by the reciprocating rectilinear movement of the pair of right and left feed bars 4A, 4B and the clamp bars 5A, 5B which are vertically overlapped. Since the movement is performed, a large number of works W can be simultaneously and repeatedly conveyed by arranging the plurality of clamp claws 32A and 32B at predetermined intervals.
[0010]
Further, according to the present invention, the conversion means C1 and C2 are supported by the housing 2 so as to be orthogonal to the cam shafts 10A and 12A on which the pair of drum cams 10 and 12 are fixed, and the pair of feed bars 4A and 4B are simultaneously provided at the upper end. A vertical first swing shaft 16 on which a feed lever 14 for forward and backward movement is swingably mounted; and a pair of clamp bars 5A, which are supported by the housing 2 in parallel with the first swing shaft 16 and at the upper end thereof. A second swing shaft 18 on which a clamp lever 15 for simultaneously moving the 5B back and forth is swingably mounted, and projectingly provided on side surfaces of the first swing shaft 16 and the second swing shaft 18, respectively. And a cam follower 14A, 15A guided and engaged with cam grooves 10A, 12A formed on the outer periphery of the drum cams 10, 12.
According to the above, the pair of drum cams 10, 12 fixedly spaced apart from the single cam shafts 10A, 12A rotationally driven by the driving force of the press machine M continuously rotate, and the pair of drum cams 10, 12 are rotated. By the continuous rotation, different swinging motions are given to the feed lever 14 or the clamp lever 15 via the cam followers 14A and 15A which are guided and engaged with the different cam grooves 10A and 12A formed on the respective outer circumferences.
Therefore, the continuous rotation of the pair of drum cams 10 and 12 causes the feed lever 14 or the clamp lever 15 to synchronize with the swing angle difference between the levers 14 and 15 at the start of forward and reverse swing within the range in which the two swing. The swing operation can be synchronized with the processing operation of the press machine M without using a dedicated control device or sensor.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is an overall plan view of a press transfer device according to an embodiment of the present invention, FIG. 2 is an overall side view of the press transfer device, FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, and FIG. FIG. 5 is a sectional view taken along line CC of FIG. 3, FIG. 6 is an explanatory view showing the swing range of the feed lever and the clamp lever, and FIG. 7 is a clamp mechanism operating piece fitted into the inclined groove of the clamp bar. FIG. 8 is an enlarged view of a portion X in FIG. 1 showing a relationship between the operating pin of the clamping machine fitted into the elongated groove of the feed bar and the clamp arm, and FIG. 9 is a view D in FIG. FIG. 10 is a sectional view taken along line EE of FIG. 8, and FIG. 11 is an operation explanatory view showing the relationship between the cam diagram of the press machine and the cam diagram of the transfer bar or the cam diagram of the clamp mechanism. It is.
[0012]
1 and 2, reference numeral 1 denotes a press transfer device according to the present invention, and the press transfer device 1 presses a plurality of supply works W using a pair of transfer bars TB1 and TB2 arranged in parallel. They are sequentially conveyed onto a mold (not shown) of the machine M.
[0013]
The transfer bars TB1 and TB2 are vertically overlapped by a driving mechanism D provided on the rear end side so as to be capable of rectilinear reciprocating movement, respectively, are guided and supported on a base 2 described later, and extend so that the front end side faces the inside of the mold. And a pair of feed bars 4A, 4B and clamp bars 5A, 5B.
[0014]
Next, a description will be given of a drive mechanism D that moves the transfer bars TB1 and TB2 straightly and reciprocally.
[0015]
The driving mechanism D is housed in a housing configured as a rectangular parallelepiped housing as the base 2, and the driving force of the press machine M extends outside the housing 2 as shown in FIGS. 3 to 5. The power is transmitted to a pulley 6 mounted on the camshaft 8.
[0016]
The cam shaft 8 is rotatably supported at both ends in the housing 2. On the cam shaft 8, a pair of drum cams 10, 12 having cam grooves 10A, 12A formed on the outer periphery are separated and fixed. Is established.
[0017]
In the housing 2, a feed drive shaft 16 as a first swing shaft and a clamp drive shaft 18 (see FIG. 5) as a second swing shaft correspond to the pair of drum cams 10 and 12, respectively. 8 are rotatably supported in a vertical direction orthogonal to each other.
[0018]
Cam followers 16B, 18B are fixed to the outer periphery of holders 16A, 18A provided at the center of the feed drive shaft 16 and the clamp drive shaft 18, and these cam followers 16B, 18B are formed on the outer periphery of the drum cams 10, 12. By engaging with the cam grooves 10A and 12A, the fixed rotation of the feed drive shaft 16 and the clamp drive shaft 18 is converted into a swing operation for obtaining a different swing angle between the pair of feed levers 14 and the clamp lever 15 described later. The conversion means C1 and C2 are configured.
[0019]
At the upper ends of the feed drive shaft 16 and the clamp drive shaft 18 protruding from the upper surface of the housing 2, a feed lever 14 and a clamp lever 15 having cam followers 14A, 15A fixed to the upper surfaces thereof are swingably mounted on a horizontal plane. Have been.
[0020]
A pair of guide rails 24A, 24B are provided side by side in the transport direction on the left and right sides of the upper surface 2A of the housing 2, and before and after these guide rails 24A, 24B, both ends are supported so as to be orthogonal to the longitudinal direction. A feed frame 20 and a clamp frame 22 that can travel back and forth are straddled in parallel.
[0021]
As shown in FIGS. 1 to 3, cam followers 14 </ b> A and 15 </ b> A of the feed lever 14 and the clamp lever 15 engage with not-shown lateral grooves formed on the lower surfaces of the feed frame 20 and the clamp frame 22 and orthogonal to the transport direction. The feed frame 20 and the clamp frame 22 can be moved back and forth along the guide rails 24A and 24B within the swing range of the feed lever 14 and the clamp lever 15.
[0022]
Rear ends of a pair of clamp bars 5A, 5B having a rectangular cross-section are fixed to the left and right of the upper surface of the clamp frame 22 disposed in front of the guide rails 24A, 24B.
[0023]
The feed frame 20 disposed behind the guide rails 24A, 24B is configured so that the height from the upper surface 2A to the upper surface of the housing 2 is slightly higher than the clamp frame 22, and the right and left sides of the upper surface of the feed frame 20 have rectangular cross sections. The rear ends of a pair of feed bars 4A, 4B formed at the rear end are fixed.
[0024]
Therefore, the pair of feed bars 4A and 4B shown in FIGS. 1 and 2 are guided by the guide member 36 (see FIGS. 7, 8 and 10) on the support surfaces on the pair of clamp bars 5A and 5B, and are moved forward and backward. The clamp bars 5A and 5B are slidably supported. The clamp bars 5A and 5B are slidable on a pair of guide rails R on which a linear guide 25 fixed at predetermined intervals on a lower support surface is mounted on a base 26. The transfer bars TB1 and TB2 extend so that the tip ends of the transfer bars TB1 and TB2 face the inside of the mold of the press machine M.
[0025]
On the other hand, a clamp mechanism 28 is provided on the distal end side of the transfer bars TB1, TB2. As shown in FIG. 1, the clamp mechanism 28 has a pair of near-side outer surfaces at the distal ends of the transfer bars TB1, TB2. Frames 30A and 30B are arranged in parallel, and clamp arms 32A and 32B as a plurality of clamp claws are fixed between the two frames 30A and 30B to hold a tip for gripping a plurality of supply works. The portions H1 and H2 are arranged in rows at predetermined intervals so as to face each other, and are slidably flush-fitted into grooves crossing the upper surfaces of the pair of feed bars 4A and 4B.
[0026]
As shown in FIGS. 7 to 10, a pair of left and right inclined grooves 38 inclined at a predetermined inclination angle in a plan view with respect to the straight traveling direction are provided before and after the pair of clamp bars 5A, 5B supporting surfaces of the distal end side transfer bars TB1, TB2. Are formed symmetrically, and a pair of oblong grooves 40 orthogonal to the straight traveling direction are overlapped on a pair of feed bars 4A, 4B supported on the upper surfaces of the clamp bars 5A, 5B so as to correspond to the inclined grooves 38. It is formed.
[0027]
As shown in FIG. 8, before and after both frames 30A and 30B, they face inward so as to correspond to the inclined grooves 38 of the pair of clamp bars 5A and 5B and the oblong grooves 40 of the pair of feed bars 4A and 4B. A pair of operating pieces 35 are protrudingly provided, and are flush-fitted in grooves crossing the lower surfaces of the pair of feed bars 4A, 4B.
[0028]
Vertical operating pins 34A, 34B are implanted on the upper and lower surfaces of the operating piece 35, and the operating pins 34A on the lower surface are fitted into a pair of left and right inclined grooves 38 of the clamp bars 5A, 5B, and the operating pins on the upper surface. Reference numeral 34B is fitted in the horizontally elongated groove 40 of each of the feed bars 4A and 4B.
[0029]
Accordingly, the lower operating pin 34A fitted in the pair of inclined grooves 38 is moved along with the upper operating pin 34B by the relative front and rear movement of the pair of clamp bars 5A, 5B and the pair of feed bars 4A, 4B. By reciprocating in the direction, a pair of parallel frames 30A and 30B can approach and separate to open and close a plurality of clamp arms 32A and 32B at the same time, and the upper operating pin 34B is horizontally long of the feed bars 4A and 4B. It can move within the range of the groove 40.
[0030]
When the lower operating pin 34A is located at the front and rear ends of the inclined groove 38, the upper operating pin 34B is also located at the end of the horizontally long groove 40, and either of these states, that is, the clamp arms 32A and 32B. Can open and close the feed bars 4A, 4B or the clamp bars 5A, 5B in a reciprocating and rectilinear manner at the interval P between the clamp bars 5A, 5B.
[0031]
Next, the operation of the press transfer device will be described in detail with reference to FIGS.
[0032]
As shown by the curve of the cam diagram shown in the upper part of FIG. 11, the press machine M performs the pressing operation in the process of performing the descending operation from 0 degree to the bottom dead center from 180 degrees to 180 degrees to 360 degrees. The ascending operation of restoring the initial position to the top dead center is performed.
[0033]
In the press transfer device, the pair of feed bars 4A, 4B and the clamp bars 5A, 5B perform a synchronous and relative reciprocating rectilinear rectilinear movement between a lowering operation and an ascending operation in which the processing operation of the press machine M is performed. It has become.
[0034]
Next, the relationship between the feed lever and the clamp lever will be described with reference to FIG.
[0035]
The feed lever 14 shown in FIG. 6 swings within a range of the swing angle α in order to move the pair of feed bars 4A, 4B below the clamp bars 5A, 5B from the state moved to the forward end to the retracted end. The cam follower 14A at the tip of the feed lever 14 moves the pair of feed bars 4A, 4B within the range of the linear movement distance L (for example, 50 mm) while swinging within the range of the swing angle α. , L1.
[0036]
Further, the clamp lever 15 can swing within a swing angle β (> α) in order to move the pair of clamp bars 5A, 5B from the state moved to the forward end to the retracted end. The cam follower 15A at the distal end 15 can reciprocate the pair of clamp bars 5A, 5B within a linear movement distance L + L2 (for example, 60 mm) while swinging within the swing angle β.
[0037]
That is, the clamp lever 15 has an extra linear moving distance L2 (= 10 mm) with respect to the linear moving distance L of the pair of feed bars 4A, 4B. Thus, a clamp or unclamping operation is performed by the clamp arms 32A and 32B.
[0038]
The initial state of the transfer bars TB1 and TB2 is at the rotational angle position S (216 degrees) in the cam diagram of FIG. 11, and as shown in FIG. 6, the cam followers 14A of the feed lever 14 and the clamp lever 15 at this time. , 15A are located at B and B ', and the pair of feed bars 4A, 4B and the clamp bars 5A, 5B are at the retracted position.
[0039]
The clamping operation is performed between the rotation angle position S (rotation angle 216 degrees) and the rotation angle position J1 point of the pair of drum cams 10 and 12 in the cam diagram of FIG. And continues to point K2.
[0040]
The feed lever 14 shown by a solid line in FIG. 6 shows a state in which the pair of feed bars 4A and 4B have been moved to the forward end, and the clamp lever 15 has moved the clamp bars 5A and 5B synchronously to the forward end. The state is shown.
[0041]
The clamp lever 15 shown in FIG. 6 rotates counterclockwise as indicated by an arrow by the lead of the cam groove 12A of one of the pair of drum cams 10 and 12 which is driven to rotate at the same time.
[0042]
As a result, the clamp levers 5A and 5B are moved to the linear movement distance L2 via the clamp frame 22 by swinging the clamp lever 15 to the rotational angle position J1 point (257.5 degrees) in the cam diagram, and the operating pin The plurality of supply works W are simultaneously clamped by moving 34A and 34B inward.
[0043]
Next, with the cam groove 10A of the other drum cam 10, the clamp lever 15 and the clamp lever 15 are rotated counterclockwise as indicated by an arrow from the rotation angle position J1 (257.5 degrees) of the drum cam 10 at which the feed lever 14 is slightly delayed. By oscillating, the feed bars 4A and 4B, together with the clamp bars 5A and 5B via the feed frame 20, maintain the clamped state of the supply work W while maintaining the linear distance corresponding to the distance P between the clamp arms 32A and 32B to the drum cam. It moves forward to 10 rotation angle positions K1 (300 degrees).
[0044]
In this state, the feed lever 14 or the clamp lever 15 swings counterclockwise to the position shown in FIG. 6 and stops, and the cam followers 14A and 15A are located at F and F ', respectively. The rotation is continuing.
[0045]
Therefore, the rotation of the drum cam 10 causes the clamp lever 15 to swing clockwise first at the rotation angle position K2, and linearly moves relative to the feed bars 4A, 4B in which the clamp bars 5A, 5B are stopped. By retreating to the distance L2 (the rotational angle position J2 point), the operation pins 34A and 34B shown in FIGS. 7 and 8 move outward, and the plurality of supply works W are simultaneously unclamped.
[0046]
Next, the feed lever 14 also swings clockwise and synchronously with the clamp lever 15, whereby the feed bars 4A and 4B and the clamp bars 5A and 5B synchronously move backward by the linear movement distance P to the initial position.
[0047]
Therefore, according to the press transfer device configured as described above, the pair of feed bars 4A and 4B and the pair of clamp bars 5A and 5B extending so as to face the inside of the mold using the driving force of the press machine M are used. The die of the plurality of supply workpieces W, which are mechanically synchronized with the reciprocating rectilinear movement and the opening and closing operations of the plurality of clamp arms 32A and 32B and the processing operation of the press machine M by the interaction of the synchronous and relative rectilinear reciprocating movement. By repeatedly transporting the workpiece to the processing position, the driving source dedicated to the transport and clamping and a detection device for confirming the operation can be omitted, whereby the mechanism can be simplified mechanically, and the transport can be performed quickly and reliably.
[0048]
In addition, when a plurality of supply works W are repeatedly forward and reverse transported at predetermined intervals P, the clamp arms 32A and 32B are clamped by using the swing angle difference (linear distance conversion L2) of both levers at the start of transport and at the time of retreat. An operation and an opening operation can be given quickly and reliably.
[0049]
Further, the clamp mechanism 28 is capable of opening / closing the pair of clamp arms 32A, 32B and reciprocating straight at the time of opening / closing only by the reciprocating rectilinear movement of the pair of right and left feed bars 4A, 4B and the clamp bars 5A, 5B which are vertically overlapped. Since the movement is performed, a large number of supply works W can be simultaneously and repeatedly conveyed by the plurality of clamp arms 32A and 32B arranged at predetermined intervals.
[0050]
The continuous rotation of the pair of drum cams 10 and 12 causes the feed lever 14 or the clamp lever 15 to swing within the range synchronized with the swing angle difference between the levers 14 and 15 at the start of forward and reverse swing. The operation can be synchronized with the processing operation of the press machine without using a dedicated control device or sensor.
[0051]
【The invention's effect】
As described in detail above, the present invention has the following effects.
[0052]
That is, according to claim 1, a plurality of feed bars and a pair of feed bars extended so as to face the inside of the mold by using the driving force of the press machine are synchronously and relatively driven by a reciprocating linear motion. The reciprocating rectilinear movement and opening / closing operation of the clamp claw and the repeated transport of multiple workpieces to the die processing position mechanically synchronized with the processing operation of the press machine detect the drive source dedicated to transport and clamping, and the operation confirmation for operation confirmation. By omitting the device, it is possible to simplify the mechanism mechanically, and it is possible to convey quickly and reliably.
[0053]
According to the second aspect, when a plurality of workpieces are repeatedly forwardly and reversely transported at predetermined intervals, the clamping operation and the releasing operation of the clamp claws are quickly performed by using the swing angle difference between the two levers at the start of transport and at the time of retreat. And it can be given reliably.
[0054]
According to the third aspect of the present invention, the clamp mechanism performs the opening / closing operation of the pair of clamp arms and the reciprocating rectilinear movement at the time of opening / closing only by the reciprocating linear movement of the pair of right and left feed bars and the clamp bar which are vertically overlapped. Therefore, by arranging a plurality of clamp arms at predetermined intervals, a large number of works can be transported simultaneously and repeatedly.
[0055]
According to the fourth aspect of the present invention, the continuous rotation of the pair of drum cams causes the feed lever or the clamp lever to swing the swing angle difference between the two levers at the start of the forward / reverse swing, and the swing within the range in which the two swing. The operation can be synchronized with the processing operation of the press machine without using a dedicated control device or sensor.
[Brief description of the drawings]
FIG. 1 is an overall plan view of a press transfer device according to an embodiment of the present invention.
FIG. 2 is an overall side view of the press transfer device.
FIG. 3 is a sectional view taken along line AA of FIG. 1;
FIG. 4 is a sectional view taken along line BB of FIG. 1;
FIG. 5 is a sectional view taken along line CC of FIG. 3;
FIG. 6 is an explanatory diagram showing a swing range of a feed lever and a clamp lever.
FIG. 7 is a partial plan view showing a relationship between a clamp mechanism operation piece and an operation pin fitted into an inclined groove of a clamp bar.
FIG. 8 is an enlarged plan view of a portion X in FIG. 1 showing a state in which an operation pin and a clamp arm of the clamp mechanism are fitted into a horizontally long groove of a feed bar.
FIG. 9 is a sectional view taken along the line DD of FIG. 8;
FIG. 10 is a sectional view taken along the line EE of FIG. 8;
FIG. 11 is an operation explanatory diagram showing a relationship between a cam diagram of a press machine and a cam diagram of a transfer bar or a cam diagram of a clamp mechanism.
[Explanation of symbols]
1 Press transfer device
2 Housing (base)
2A Housing top
4A, 4B feed bar
6 Pulley
8 Cam shaft
4A, 4B feed bar
5A, 5B Clamp bar
10,12 Drum cam
10A, 12A cam groove
14 Feed lever
14A cam follower
15 Clamp lever
15A cam follower
16 Feed drive shaft (first swing shaft)
16A holder
16B cam follower
18 Clamp drive shaft (second swing shaft)
18A holder
18B cam follower
20 Feed frame
22 Clamp frame
24A, 24B guide rail
25 Linear Guide
26 base
28 Clamp mechanism
30A, 30B frame
32A, 32B Clamp arm
34A, 34B operating pin
35 Working piece
36 Guide member
38 Inclined groove
40 horizontal slot
C1, C2 conversion means
D drive mechanism
H1, H2 Tip gripper
J1, J2, K1, K2 Rotation angle position
L1, L1 Equivalent distance before and after
L, L2 Linear travel distance
M press machine
P interval
R guide rail
TB1, TB2 transfer bar
W Supply work
α, β swing angle

Claims (4)

In a press transfer apparatus that sequentially transports a plurality of supply works W onto a mold of a press machine M using a pair of transfer bars TB1 and TB2 arranged side by side,
The transfer bars TB1 and TB2 are guided by a drive mechanism D provided on the rear end side so as to be capable of rectilinear reciprocating movement and vertically superimposed on the base 26 so as to be rectilinearly reciprocated, and extend so that the front end side faces the inside of the mold. It comprises a pair of feed bars 4A, 4B and clamp bars 5A, 5B. At the distal ends of the transfer bars TB1, TB2, the clamp bars 5A, 5B and the feed bars 4A, 4B reciprocate in a synchronous and relative manner. The clamping mechanism 28 has a plurality of clamp claws 32A and 32B arranged at predetermined intervals in the longitudinal direction so as to perform a reciprocating rectilinear movement and an opening / closing operation orthogonal to the rectilinear movement by the interaction of the movement. A pair of drum cams 10, 12 fixedly spaced apart from each other on cam shafts 10A, 12A rotationally driven by the driving force of the press machine M; A conversion that engages the pair of drum cams 10, 12 with the rear ends of the feed bars 4A, 4B and the clamp bars 5A, 5B, respectively, and converts the rotation of the pair of drum cams 10, 12 into a swing operation having different swing angles. A press transfer device comprising a pair of levers 14 and 15 provided with means C1 and C2. The pair of levers 14 and 15 include a feed lever 14 that engages with the feed bars 4A and 4B and a clamp lever 15 that engages with the clamp bars 5A and 5B. The feed lever 14 and the clamp lever 15 are synchronized. At the start of the forward / reverse swing, the opening / closing operation of the clamp claws 32A and 32B is performed by utilizing the swing angle difference between the levers 14 and 15, and the clamp mechanism 28 is moved within the swing range of the levers 14 and 15. 2. The press transfer apparatus according to claim 1, wherein each of the workpieces W is repeatedly conveyed to a die processing position at predetermined intervals in synchronization with a processing operation of the press machine M. In the clamp mechanism 28, a pair of frames 30A, 30B disposed in parallel near both outer surfaces of the tips of the transfer bars TB1, TB2, and tip gripping portions H1, H2 face between the frames 30A, 30B. A plurality of clamp arms 32A, 32B which are arranged in rows at predetermined intervals as described above and which are guided and supported so as to be able to advance and retreat in a direction orthogonal to the pair of feed bars 4A, 4B, from the front and rear of both frames 30A, 30B. And a pair of operating pieces 35 provided with operating pins 34A, 34B which are guided and supported so as to be able to advance and retreat in directions perpendicular to the upper and lower feed bars 4A, 4B and the clamp bars 5A, 5B. Consisting of
In order to fit the lower ends of the pair of operating pins 34A, 34B, a pair of left and right inclined grooves 38 inclined at a predetermined inclination angle in a plan view with respect to the straight traveling direction are formed before and after the pair of clamp bars 5A, 5B in the transport direction. The pair of operating pins 34A, 34B are formed symmetrically and correspond to the pair of inclined grooves 38 so as to fit the upper ends of the pair of operating pins 34A, 34B. A horizontal elongated groove 40 is formed, and the pair of clamp bars 5A, 5B and the pair of feed bars 4A, 4B are moved forward and backward relative to each other via the operating pins 34A, 34B fitted in the pair of inclined grooves 38. The clamp claws 32A and 32B are opened and closed, and the pair of clamp bars 5A and 5B and the pair of feed bars 4A and 4B are synchronously moved back and forth to allow the pair of horizontally elongated grooves 40 to move. Re or on the edge portion is the actuating pin through the clamp arm 32A, presses the transfer apparatus according to claim 1 or 2 is configured to move 32B a back and forth. The conversion means C1 and C2 are pivotally supported by the housing 2 so as to be orthogonal to the camshafts 10A and 12A on which the pair of drum cams 10 and 12 are fixed, for simultaneously moving the pair of feed bars 4A and 4B back and forth at the upper end. A vertical first swing shaft 16 on which the feed lever 14 is swingably mounted, and a pair of clamp bars 5A, 5B which are supported by the housing 2 in parallel with the first swing shaft 16 at the upper end thereof are simultaneously moved back and forth. A second swing shaft 18 on which a clamp lever 15 for swinging is mounted so as to swing, and a pair of drum cams 10 and 12 projecting from side surfaces of the first swing shaft 16 and the second swing shaft 18, respectively. 2. The press transfer device according to claim 1, comprising cam followers 14A and 15A which are guided and engaged with cam grooves 10A and 12A formed on the outer periphery.

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