DE2357758A1 - Machine tool material supply - has device for transferring parts from vertically movable flexible storage support - Google Patents

Abstract

Plant for automatically supplying material pieces to automatically working machines includes a material receiving framed enclosure with a bottom in which is a flexible storage support for the material pieces on suspension devices mounted at the top corners of the inlet and outlet side of the frame enclosure. On the material discharge side of the support is a device by which this support side is moved upwards in a top position in which the device transfers a predetermined number of material pieces from the flexible support to the machine. With the transfer completed the device returns the flexible support with the remaining material pieces in its bottom position, after which the transferring cycle is repeated.

Description

PATENT LAWYERS F.W. HEMMER ICM -GESD MÜlLER ■ DIGFIOSSE 22

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Azuma Sangyo Company Ltd. , Tokyo / Japan Ma ter i a 1 ζ uf u hru ng s anJ age

The subject of this invention is an automatic material feed system or workpiece infeed system, the subject of this In particular, however, the invention is a system with which the Material individually one after the other or automatically in groups an automatic processing machine or an automatic one Machining system is supplied, or one Material feed device or workpiece feed device belonging to this automatic processing machine or processing system.

For this material feed sanlase or work piece feed system includes a material receiving chamber with a bottom; with a Materia 1 Aufnähmevorrichtung with. one end like that with a drive wheel is connected to the outlet side that they can be unwound and wound, in such a way that The larger part of the material receiving device is then in the Materia L on took ekainmer can move vertically; with a from the unloading of the material receiving chamber to the processing system or the like extending device for leading out or to transfer the material or the workpieces; finally also with measuring sensors that lead out the material and have to measure or detect the lower position of the material receiving device.

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This invention will now be described below with reference to the drawing illustrated embodiment (the one shown in the drawing Embodiments) explained in more detail. The drawing shows in: -

Fig. 1 'A side view showing part of the plant of this Invention reveals.

FIG. 2 is a side view showing another part of the plant of this invention - shown with FIG fc.

Fig. 3 A front view with omission of parts that reproduces a part of the system that follows the part Fig. 1 corresponds.

Fig. K is a perspective view showing a portion of the system of this invention.

¥ ie from Fig. 1 and Fig. 3 can be seen, is the stand or the frame of the system is marked with the general reference number 1, whereas the general reference number 3 stands for a drive wheel via which the material pick-up device, for example a chain 5 is guided. This chain comes with an end held by a chain retainer 7, while the other The end of this chain at a lower than the wheel 3 Drive wheel is attached so that the chain can be wound and unwound. To the embodiment This invention includes three subassemblies, each composed of the chain 5, the wheel 3 and the wheel 9. These Assemblies are also arranged in different places. The wheels 9 are on a shaft 11 in a cooperative manner placed, which can rotate in a bearing block 10. The surface of the chain 5 can be coated with a friction-reducing material,

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for example with a tape. With the general reference number 13 is a Wellenantriebsrad is characterized, which is driven via belts 17 from a wheel l6 of which is in turn driven by a reversible direction of rotation motor or reversing motor 15th The material receiving chamber marked with the general reference number 18, which has to receive the material or the workpieces M, includes: a base 19 and the side walls 20 and 20 '. Recesses 21 which can accommodate the chains 5 are preferably machined into the floor. These recesses 21 can of course also be omitted, in which case the chains 5 are arranged directly on the floor iy. The reference number 23 stands for a material from! Aß - ie for the corresponding exit guide - which extends from the outlet of the material receiving chamber 18 to the processing device or the like and has to lead out the material or the workpieces for the next operation. The end of this material outlet guide which is closest to the end of the material receiving chamber is arranged essentially in the same plane as is the case with the upper edge E of the wheel or wheels 9. In the course of the material outlet guide, between its two ends, a measuring sensor S _{1 is} arranged, which has to detect the passage of the material and thereby reverse the direction of rotation of the motor J5. Another measuring guide device that is locked or connected to the wheel 16 is marked with S ₂ . In terms of construction, this measuring sensor mechanism consists of microswitches or limit switches M and Mp, which are reciprocally moved by switch actuating plungers 35 and 37, which are reciprocated via pulley 25, belt 27, pulley 29 and gears 35 and 37 , controlled and operated. Is k. As can be seen from Fig. 1 and from FIG,

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the two switch actuating plungers 35 and 37 are arranged in a phase shift. The sensor mechanism M. is then actuated and controlled by the switch actuating plunger 35 when the chain is about to move into the upper setting position, ie when the chain 5 between the two wheels 3 and 9 is in a straight line and is tensioned. In this case, the reversible motor or the reversing motor I5 is temporarily brought to a standstill. In contrast, the sensor mechanism M "is controlled and operated by the switch actuating plunger 37 when the chain is about to assume the lower setting position, ie when the chain 5 is about to move into the position marked ^{in FIG. 1 with the reference number 5 1} , in which case the motor I5, which now rotates in the opposite direction, is brought to a temporary standstill again. Even if not expressly shown in the drawing, a suitable time switch can be provided which then causes the motor 15 to rotate forwards again after a predetermined or predetermined time. Alternatively, the forward rotation of the motor 15 can be caused by a command or an impulse which is switched on from the automatic processing machine or processing system. With this, however, the sensor device S is constructed and designed in such a way that the motor I5 is then temporarily switched on and brought to a standstill by it when the chain is in the uppermost and in the lowermost position. The translation of the gears is designed in such a way that when the chain moves from the lowest to the uppermost position, the aforementioned switch actuating plungers rotate through an angle of rotation of less than 360 °. The following should now

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the mode of operation or the function of the exemplary embodiment of this invention will be described in the event that the material feed system of this invention in the Handover of the material for the next work process sram Is brought to a standstill, in which case a control or actuation of a measuring sensor assigned to the next work process is carried out S "then causes the motor 15 to rotate forward, if new material is required for this new operation after regular processing

In order to introduce material M into the material receiving chamber 18 can, first of all, the chain 5 is in the lowest setting position brought by the fact that the motor 15 rotates in the reverse direction and thereby the sprockets 9 to unwind the chain over the wheel l6, over the chain 17, over the wheel 13 and over the shaft 11 in the opposite direction offset in rotation «In the lowest position of the chain the chain extends along the wall '20, partly un-, ter the bottom 19 of the material receiving chamber 18, whereby the » The chain extends through the recess 21. If this is the case, the material M or the workpieces M can be placed by a crane or a similar device in direction A into the material receiving chamber 18, with the material or the workpieces M on the floor I9 in the chamber be stored in an orderly manner without the chain 5 being damaged will.

The automatic operation of the material feeding system of this Invention is activated by the fact that the (here not wi - the given) power switch is brought to the on / off position The motor I5 is driven by the forward thrust that occurs causes the wheel 9 to wind up the chain 5, with the

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Raising the material M the chain 5 is gradually tensioned. At the point in time at which a material unit M is in the uppermost position above the upper edge E of the wheel 9, the other material units M are still in a lower position. In this way, however, the material units M are then successively fed to the next processing stage via the passage 23 when each material unit M moves over the upper edge E of the wheel 9. If the measuring sensor device S _{1 is} arranged and designed in such a way that, when passing through a single material unit or a specific one. Number of material units - for example a material unit - is actuated and controlled, a change in the direction of rotation can then be caused in the motor 15 when a single material unit M leaves the wheel 9 and then passes over to the subsequent machining system. Alternatively, the sensor S can also be assigned to the subsequent processing system. After the motor has changed its direction of rotation, the chain 5 begins to loosen and unwind, possibly reaching the floor 19 and penetrating the recesses 21 to below the floor 19, which in turn means that the material units M can be placed on the floor 19 in an orderly manner. As soon as the chain 5 has reached the lower setting position 5 *, the sensor mechanism M "of the sensor S ₂ is controlled and actuated by the switch actuating plunger 37 - this has already been described above, which in turn leads to the motor 15 being brought to a standstill . If, after regular operation of the downstream processing installation, the measuring sensor device S 1 (not shown) is actuated, the forward rotation of the motor 15 starts again, with the lifting of the material M

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the chain 5 is gradually tensioned, then in the aforementioned manner after the detection of a Materia.leinh.eit which leaves the upper edge of the wheel 9 and is transferred to the downstream processing system, the motor is prepared _{by the measuring sensor S 1} the subsequent reversal of the direction of rotation »temporarily switched off and brought to a standstill. In this way, the above procedure is repeated. .-.;.

In the aforementioned construction, is always when a Materiäleinheit has been handed over _r lowered the chain 5, so that the material units may be aligned according to the floor 19 and disposed. In this way, a smooth transfer and supply of the material _t ensured even if initially crossing the material units and across to each other. Furthermore, with this construction, in which the chain 5 can move below the floor 19, this chain 5 can then be held in the lowest setting position when no material units are to be transferred, which in turn increases or elongates the chain .5 reduced due to the weight of the material, so that a correct and reliable operational sequence is always guaranteed. In addition, devices for holding the unloaded chain in position need not be provided, so that a simple and inexpensive construction can be ensured.

Fig. 2 now shows a different part or another embodiment of the above-described material feed system of this invention. The reference number kj stands for the front sprocket or drive wheel of a conveyor belt, whereas the forward number 49 stands for the rear drive wheel of this conveyor belt

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stands. These drive wheels are fastened on a shaft 57 which is mounted in the bearing plate or in the bearing plate 55, which in turn is mounted on the upper part of a frame or stand 51 and 53. An endless transport chain 59 is guided over the drive wheels kf and k9. The conveyor belt transport wheel 49 is driven by a motor Ma mounted on the stand 51 by means of a drive chain 65 which is guided over the chain wheel 61 belonging to the motor Ma and over the chain wheel 63 placed on the drive shaft 57. As can be seen from FIG. 2, the conveyor belt drive wheel k9 is arranged behind the chain wheel 6j. The un§ with the general reference number ^e un? Er ^e OCE TVansportkette under the continuous transport chain 59 arranged chain bracket to prevent sagging of the transport chain 59th This chain holder 67 is held on one side by the bearing plate 55 and on the other side by a guide element 69. The reference number 71 stands for a bow element which extends sideways into FIG. 3 and is mounted above the transport chain 59. A bracket 73 is attached to the underside of this arch element 71, to which a further bracket 75 is attached by means of the adjusting screws 78 and the nuts 79, in such a way that the gap e between the underside of a holding element 77 - this holding element is with the underside the holder 75 is made integrally and in one piece - and the top of the transport chain 59 can be adjusted to the diameter of the material units M. A material alignment wheel is marked with the reference number 80, which is rotatably mounted on the inlet side of the holding element 77, while on the side closer to the material receiving chamber there is a stack of material units which are removed from the chamber.

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have been conducted. As can be seen from Fig. 2, has the alignment wheel 80 preferably has circumferential teeth, but this is not absolutely necessary. In front of the alignment wheel 8O, which sits on shaft 81, is also a sprocket 83 put on, the rotary movement of the on the Bpgenelement 71 mounted motor Mb on the alignment wheel or the Alignment element 80 has to be transferred. The clue number 87 stands for a stop near the outlet side of the transport chain 59 is arranged, i.e. in the vicinity of the transport chain drive wheel ^ -9.

The lower part of the stop 87 is with a piston 90 one Oil hydraulic mechanics 89 connected in such a way that the stop can be moved out and retracted with regard to the gap e through the guidance of a stop element guide 91. The output element marked with the general reference number 93 or output wheel is on the output side of the bearing plate 55 rotatably mounted and with several axial grooves on its circumference or axial recesses, which correspond to the diameter of the material, provided «From this output element or output wheel the material units that have been supplied by the transport chain 59 are successively moved one by one on an incline Slide plate 97 led out. That on the slide plate 97 material that has been removed slides down and finally hits at the lower end of the slope against a stop 99, from where it is then through a suitable device perpendicular to the drawing or to FIG. 3 of the processing machine or the processing system. The output element or wheel 93 is driven via a chain wheel 103 from a motor Mc which is mounted on the frame or stand 53.

With the aforementioned construction, several material

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Guide out the units M on the chains 5 and insert them into the gap e 'when the chains 5 are lifted or moved upwards in the material receiving chamber. The material units M transferred to the transport chain 59 overlap and interfere with one another so that they do not get directly into the gap e. However, this hindrance is removed when the alignment element or the alignment wheel 80 rotates in the direction of arrow B, whereupon the units of material are inserted one after the other into the gap e. The material M that has entered the gap e is held for a short time by the stop 87, which is then withdrawn when a row of material units are aligned with one another, the. Material units are then fed in the aligned state to the output unit or to the output wheel 93 in order to be transferred from there to the inclined plane 97 one after the other from the output unit or from the output wheel 93. At the lower end of the slide plate 97, the material strikes against a stop device 99 and is fed from there by a suitable device to the processing machine or the processing system. The movement of the stop device lä _t ßt be achieved by an already known structure, and therefore need not be described in this context.

According to the description, the material M can through the alignment element 80 released from the obstruction and inserted smoothly into the gap e. In addition, the chain bracket 67 prevents the chain 59 from sagging due to the weight of the material, the exact gap e can always be adhered to.

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Claims (1)

Azuma Sangyo Company Ltd., Tokyo / Japan Patent claims: 1. / Material feeding system belong to it: - a material receiving chamber (18) with a bottom (19) 5, a material holding device (5) mounted on the suspension devices (3, 9) to the A Laue and outlet sides of the Materialaufnahraekammer (l8); a device which causes a row of material units to be held on the deposition part of the material holding device (5), but also a vertical movement of the material holding device (5) »a device which causes the simultaneous transfer of a suitable number of material units when the aforementioned material holding device has arrived in the uppermost position; a device which, after the transfer of a suitable number of material units, causes a downward movement of the material holding device (5) together with the rest of the material units located thereon; Finally, there is also a device that raises the material together with the material holding device from the lowest position. 5 098 2 1/01 S3 £ 22 5 - bra - . * November 16, 1973 Material feed system according to claim 1, characterized in that it also includes: a first measuring sensor device (S ₁ ) which is arranged near the transfer device and has to detect the transfer of the material, which in turn causes the material holding device (5) to move downwards; finally also a second measuring sensor device (S ₂ ) which has to detect the arrival of the material holding device (5) in the lowest position and thereby stop the downward movement of the material holding device. Material feed system according to claim 1, characterized in that the material holding device (5) consists of: a chain-like construction element, which extends to under the floor (19) of the material receiving chamber (l8) the arrival in the lowest position can move. Material feed system according to claim 1, characterized in that the receiving device, which has to take over the material from the material receiving chamber (18), is composed of: - a material transport chain (59); a holding element (77) above the aforementioned tram chain (59) - this holding element (77) adjustable in the vertical direction; an alignment device · or an alignment wheel (80) which is rotatably mounted on the inlet side of the holding element (77) and which has to remove the mutual hindrance of the material units »finally from an output device or an output wheel (93) on the outlet side of the transport chain (59) which has the units of material individually feed out one after another, said units of material are fed _x aforementioned conveyor belt or of the aforementioned conveyor chain (59). 509821/0183 "** ⁰ ORlGlMAL INSPECTED