• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a safety system (28) for a production plant (1) for bending sheet metal. The safety system (28) comprises a transmitting device (29), a detection device (30) and a fastening unit (31) each having a fastening device (32) for the transmitting device (29) and the detection device (30). The fastening device (32) comprises a slender and elongated holding element (33), a rotatable adjusting disc (36) and a counterweight body (40) or an elastic tension element (38). A first end region (34) of the holding element (33) is connected to the transmitting device (29) or the detection device (30) and a second end region (35) is connected either to the counterweight body (40) or to the tension element (38). Furthermore, the invention also includes a production plant (1) with such a security system (28).
    公开号:AT519646A4
    申请号:T50186/2017
    申请日:2017-03-09
    公开日:2018-09-15
    发明作者:
    申请人:Trumpf Maschinen Austria Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The invention relates to a safety system for a manufacturing plant for bending or embossing bending of a workpiece to be produced from a sheet metal by means of a bending press and a production line with such a security system.
    In previously known security systems, the transmitting device and the detection device were each adjustably held on fixedly connected to the upper beam bar flattening arms. A change in the relative position of the transmitting device and the detection device with respect to the upper press beam was only for adjustment and adjustment activities, otherwise there was a rigid attachment to the upper beam and, associated with a fixed Mitverstellung with this. The disadvantage here is that in a collision of the transmitting device and / or the detection device in the course of the lowering process for performing the bending operation, the fastening device was unyielding and predominantly rigid. Thus, greater pressure forces could be transmitted from the transmitting device and / or the detection device to body parts, which either resulted in damage to the transmitting device and / or the detection device. It could also lead to injury to the operator.
    Object of the present invention was to overcome the disadvantages of the prior art and to provide a security system and a manufacturing plant with such a security system, while this is avoided by a clamping risk and the safety system also has a simple construction in a small footprint ,
    This object is achieved by a security system for a manufacturing plant as well as a production plant equipped with such a security system according to the claims.
    The safety system according to the invention is provided for a production plant for bending or embossing bending of a workpiece to be produced from a sheet metal by means of a bending press and can comprise at least the following component components: a transmitting device for emitting at least one light beam, a detection device for receiving the at least one light beam, a fixing unit depending on a fastening device for the transmitting device and the detection device for attaching the transmitting device and the detection device in spaced Stirnendbereich an upper press beam of the bending press, wherein the fastening device comprises at least one holding element, which is at least one holding element limp and elongated and distanced in its longitudinal extent from each other first end portion and a second end portion, and the fastening device further comprises a control disc, which adjusting disc is stationary above, in particular in the vertical direction above, the transmitting device or the detecting device, and the adjusting disc is rotatable about a rotational axis with a horizontal orientation, and the first end portion of the at least one holding element is connected to the transmitting device or the detecting device, and the at least one retaining element is deflected or deflected on the adjusting disk, and wherein the second end region of the at least one retaining element is connected to a counterweight body or to an elastic tension element which is held stationary at an anchor point.
    The advantage achieved by this is that by choosing the limp-free suspension of the transmitting device or the detection device, a secure hanging positioning can be achieved laterally next to the pressing beam. However, it can not be transmitted to the transmitting device or the detection device in a collision of the same with a body on this from the upper press beam on the pliable holding element towards the transmitting device or the detection device. This is a high safety function to avoid pinching a body part and associated injuries. By providing a control disc and the deflection or to steer the holding member to this, in addition, an adjustment can be carried out starting from the adjusting disc out on the holding element and subsequently to the transmitting device or the detection device. Thus, the adaptation of the monitoring area of the safety device can be adapted to changing tool geometries of the bending tool. Furthermore, by the deflection or to steer the holding element on the adjusting disc and by the interaction of the holding element with the counterweight body or the elastic tension element between the holding element and the adjusting disc a static friction force can be constructed. The value of the built-up static friction force can be determined and determined by the extent of the wrap angle and the friction coefficient, in particular, the static friction coefficient. Characterized in that the holding element is designed exclusively for transmitting tensile forces and a transmission of compressive forces is not provided or excluded, so a mechanical clamping starting from the transmitting device or the detection device with a projecting in the adjustment body part and a fixed component of the bending press prevented become.
    Furthermore, it may be advantageous if the at least one retaining element is tension-resistant, in particular strain-resistant. Thus, an exact positioning of the transmitting device and / or the detection device by means of the holding element relative to the press beam, in particular the one or more arranged thereon punch dies can be achieved.
    Another embodiment is characterized in that the at least one retaining element is selected from the group of ropes, belts, bands, stokes, chains. As a result, a simple adaptation to different operating conditions and the adjusting disc in drive connection can be achieved.
    Another possible embodiment has the features that the counterweight body has a net mass which is equal to or smaller than the net mass of the transmitting device or the detection device. Thus, different load conditions can be realized up to the state of equilibrium at both deflected on the adjusting plate or deflected portions of the holding element.
    A further embodiment provides that the elastic tension element from the group of scroll spring, coil spring, coil spring, rubber band, gas spring, pneumatic cylinder, hydraulic cylinder is selected. Thus, it is easy to adapt the pulling action or tensile force developed by the elastic tension element to the second end region of the retaining element to different conditions of use. If pneumatic cylinders and / or hydraulic cylinders are used, it is advantageous if they are not specifically controlled, but are only biased.
    Another embodiment is characterized in that the adjusting disc is in drive connection with a drive device. By providing a drive device for the adjusting disk, in addition to the deflection o of the deflection of the holding element, an adjusting movement and, associated therewith, a vertical relative adjustment with respect to the upper pressing beam can be carried out.
    A further preferred embodiment is characterized in that the fastening device comprises in addition to the adjusting disc to a steering disc to which deflecting the at least one retaining element is also deflected or deflected. By providing an additional order steering wheel, the wrap angle of the retaining element on the adjusting disk by means of a corresponding arrangement can be easily varied to each other. By the extent of the wrap angle, in conjunction with the coefficient of static friction, those
    Counteracting force can be determined or determined, with which the transmitting device o-the detection device must be relieved until it comes to a slippage of the retaining element on the adjusting disc. By this relieving the static friction force is reduced and it comes in a subsequent consequence to a slippage of the retaining element on the otherwise fixed rotationally fixed adjusting disc.
    Furthermore, it may be advantageous if the order steering disc with respect to the longitudinal course of the at least one holding element between its first end portion and its second end portion of the adjusting disk is arranged upstream. As a result, starting from the detection device or starting from the transmitting device, no vibrations can be transmitted directly to the adjusting disk via the holding element.
    A further alternative embodiment is characterized in that the deflecting disk is arranged downstream of the first end region and its second end region of the adjusting disk with respect to the longitudinal course of the at least one retaining element. By rearranging the order of the steering wheel with respect to the adjusting disk can in this case also depending on the relative vertical position to each other, the extent of the wrap angle and associated therewith the built-up static friction force can be determined.
    Another alternative embodiment is characterized in that both the adjusting disc and the order-around steering disc with respect to the longitudinal course of the at least one holding element between its first end portion and its second end portion are arranged on the same side of the support member. As a result, deflection always takes place in the same direction of deflection as seen in the circumferential direction, as a result of which both the adjusting disk and the deflecting disk are always arranged within the wrapping surface located between the two end regions.
    Another possible and possibly alternative embodiment has the features that the fastening device further comprises a guide device, by means of which guide device guided the transmitting device or the detection device, in particular guided in the vertical direction.
    By providing a guide device, the transmission device or the detection device can be guided exactly relative to the press beam. Furthermore, but also due to the hanging arrangement pendulum operations of the suspended transmitting device or the detection device can be avoided. Thus, the total security can be additionally increased or improved.
    However, the invention also relates to a production plant, in particular for the free bending or embossing bending of a workpiece to be produced from a metal sheet, the production plant may comprise at least the following component components and / or component groups: a bending press, in particular a press brake, with a machine frame, a lower pressing beam, an upper pressing beam and tool receptacles arranged or formed on the pressing beam, at least one bending tool with at least one bending punch and at least one bending die, a security system with a transmitting device, a detection device and a fastening unit each having a fastening device for the transmitting device and the Detection device, wherein - the mounting arrangements are each arranged on the upper press beam spaced from each other in a front end region thereof.
    As security system, in particular its fastening unit, that is used, which comprises the following components: - a transmitting device for emitting at least one light beam, - a detection device for receiving the at least one light beam, - a fixing unit, each with a fastening device for the transmitting device and the detection device for fastening the transmitting device and the detection device in spaced Stirnendbereich an upper press beam of the bending press, wherein the fastening device comprises at least one holding element, which is at least one support member pliable and elongated and spaced apart in its longitudinal extent from each other has a first end portion and a second end portion, and the fastening device further comprises a control disk, which adjusting disk above, in particular in the vertical direction above, the transmitting device or the detection is stationary, and the adjusting disc is rotatable about an axis of rotation with a horizontal orientation, and the first end portion of the at least one holding element is connected to the transmitting device or the detection device, and the at least one holding element is deflected or deflected on the adjusting disc and wherein the second end portion of the at least one retaining element is connected to a counterweight body or with a stationary at an anchor point held elastic tension element.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    In each case, in a highly simplified, schematic representation:
    1 shows a production plant with a bending press and schematically indicated security system, in front view;
    FIG. 2 shows a first possible embodiment of a fastening device of the safety system, in a side view in the direction of the upper pressing beam; FIG.
    3 shows a second possible embodiment of a fastening device of the safety system, in a side view in the direction of the upper pressing beam;
    4 shows a further possible embodiment of a fastening device of the safety system, in a side view in the direction of the upper pressing beam.
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.
    The term "in particular" is understood below to mean that it may be a possible more specific training or specification of an object or a method step, but not necessarily a compelling, preferred embodiment of the same or a compelling approach.
    In Fig. 1, a manufacturing plant 1 is shown in highly simplified schematic representation, which is formed in the present case, in particular for the free bending of sheet metal to be produced workpieces 2 by means of bending.
    The manufacturing plant 1 used for bending in the present case comprises a bending machine, in the present embodiment, a bending press 3, in particular a press brake or press brake, for producing the workpieces 2 or workpieces between at least one relatively adjustable bending tool 4. The bending tool 4 comprises in the present embodiment at least one bending punch 5, but usually a plurality of bending punch 5, and at least one bending die 6, but usually more cooperating bending dies 6. The at least one bending punch 5 is arranged above the workpiece to be manufactured 2 on the bending press 3 and held there, in particular clamped. Also, at least one bending die 6 is held on the bending press 3, in particular held clamped thereto.
    As a coordinate system in such bending presses 3 is basically referred to as "X" direction that runs in a horizontal plane and in a vertical orientation with respect to the longitudinal extension of the bending tool 4, in particular its punch 5 and bending die 6. Thus, this is the direction which also corresponds to the feed direction or the withdrawal direction. As "Y" direction, the vertical direction is understood, which thus extends in the height direction of the bending tool 4 and further in the vertical direction with respect to the horizontal plane. Finally, the "Z" direction is understood to be that direction which extends in the longitudinal direction or in the longitudinal extent of the bending tool 4, in particular its bending punch 5 and bending die 6. As a result, the longitudinal extent of the bending edge defined by the bending tool 4 in the "Z" direction is also aligned.
    A machine frame 7 of the bending press 3 comprises, for example, a base plate 8, on which are vertically upstanding, spaced apart in the transverse direction and parallel to each other side cheeks 9, 10 are arranged. These are preferably connected to each other by a solid, formed for example from a sheet metal part cross member 11 at their distance from the bottom plate 8 end portions.
    The side cheeks 9, 10 may be formed approximately C-shaped to form a free space for forming the workpiece 2, wherein on front end faces 12 of bottom flanges of the side cheeks 9, 10 a fixed, in particular on the bottom plate 8 aufstehender, first pressing bar 13 or lower Press bar 13 is attached. This fixedly arranged and fixed pressing beam 13 can also be referred to as a press table, on which parts of the bending tool 4 are arranged and also held. At front end faces 14 of legs removed from the base plate 8, a guide bar 13 of relatively adjustable further pressing bars 16 is guided in linear guides 15 guided to form the table beam. The pressing beam 16 can also be referred to as a second pressing beam or upper pressing beam but also as a pressure beam.
    On opposite, mutually parallel end faces 17, 18 of the two pressing bars 13, 16 can be arranged 19 tool holders 19, 20 for assembly with the bending tools or. The bending tool or tools 4 may also be held with the interposition of an adapter, not shown, to the tool holders 19, 20, which is considered not favorable for a change process of individual components or the entire bending tool 4, but may also represent a possibility.
    The bending press 3 shown has as drive arrangement 21 for the adjustable pressing beam 16, namely the pressure beam, e.g. two powered by electric energy drive means 22, which may be conductively connected to a fed from a power grid 23 control device 24. For example, the operation of the bending press 3, in particular the changing operation of the bending tool 4, can be controlled via an input terminal 25 communicatively connected to the control device 24.
    The drive means 22 may be e.g. to act electromotive spindle drives 26, as they are well known, of which adjusting means 27 for a reversible positioning movement of the upper beam formed by the pressure bar 16 with this, for example, are drive-connected. Regardless of this, it would also be possible to form the drive means 22 by means of hydraulically and / or pneumatically actuatable actuating means. It can find cylinder-piston arrangements application. But it would also be other drive means, such as. Eccentric drives, toggle drives, rack drives, etc. conceivable.
    Furthermore, the manufacturing plant 1 may also include a manipulator not shown here, which at least a piece of it takes from a supply stack of sheets to be deformed or abzukantenden and spends in the work area or the operating side of the bending press 3. The manipulator can also serve or be used to perform the tool change or a change in position of the same.
    The manufacturing plant 1 in this exemplary embodiment also includes a safety system 28 for checking and monitoring the bending process and / or whether an object, in particular a body part of an operator, is located in the working area of the bending tool or tools 4. By means of the security system 28 it can thus be monitored whether e.g. the operator's hand is in the danger zone between the punch 5 and the cooperating bending die 6. If this is the case, the safety system 28 stops the successive movement of the bending tool 4, in particular the downward movement of the upper press beam 16, in the direction of the lower pressing beam 13. Thus, pinching of a body part and an associated injury can be prevented. Such systems are usually based on an optoelectronic basis.
    The security system 28 may include at least one transmitting device 29 and at least one cooperating detection device 30, which are arranged spaced apart in the longitudinal extent of the tool holders 19, 20 or the pressing bars 13, 16. The detection device 30 is embodied here as an optical detection means and can also be referred to as a reception device, which receives or emits the at least one light beam emitted or emitted by the transmission device 29 as light source and subsequently evaluates it if necessary.
    Preferably, the security system 28, in particular the transmitting device 29 and the detection device 30 are each arranged on the upper pressing beam 16, in particular connected thereto. For this purpose, a fixing unit 31, each with a fastening device 32 for the transmitting device 29 and the detection device 30 is provided. The structure of both fastening devices 32 is preferably selected to be equal to one another in principle.
    Thus, at least both the transmitting device 29 and the detection device 30 are constantly moved with a relative displacement movement of the upper press bar 16. Of the transmitting device 29 are usually multiple light beams, in particular laser beams, emitted, which are received and detected by the detection device 30. This principle is basically to be regarded as known, which will not be discussed in more detail here. When interrupting at least one of the light beams, the adjusting movement of the bending press 3 is stopped. The position of the emitted light beams is to be set as a function of the working length of the bending tool 4, in particular of the bending punch 5 intended for the bending operation.
    A relative movement between the upper pressing beam 16 and the transmitting device 29 and the detection device 30 is basically provided only for adjustment and / or adjustment activities. Such adjustment and / or adjustment operations are e.g. then required if due to a tool change a modified working length of the punch 5 is present. The position of the light beam (s) is usually selected at a predefined distance below the working edge of the respective bending punch 5 provided for the bending operation.
    The arrangement and mounting of the security system 28, in particular the transmitting device 29 and the detection device 30, on the upper pressing bar 16 by means of the fixing unit 31 in each case in an end-side end region of the same and is indicated here only schematically. The two end regions or longitudinal ends of the upper pressing beam 16 are arranged spaced apart in the direction of the longitudinal extent. Possible different configurations are described in more detail in the following FIGS. 2 to 4.
    In contrast to a predominantly rigid attachment is now provided that the transmitting device 29 and / or the detection device 30 by means of their respective associated fastening devices 32 in the bending operation in a collision is not rigid, but simply held relatively adjustable relative to the upper press bar 16 thereto. This is done by suspending the transmitting device 29 and / or the detection device 30 on a flexible, pliable elongated member which is designed to be stretch-resistant or stretch-resistant in the case of the forces and loads to be absorbed and transmitted. Under stretch, tensile or tensile stiffness is understood here that the holding member 33 has no or only a minimum longitudinal strain in the male and to be transmitted tensile forces. However, the holding element 33 should not exhibit any stiff and rigid properties when it exerts a compressive force, in order to be able to easily deform it, starting from its straight longitudinal extent, into a position deviating therefrom.
    Further details required for the operation of such a bending press 3, such as, for example, feed devices and / or control devices, are omitted from the description in order to avoid an unnecessary length of the description.
    Since the basic structure of each of the fastening devices 32 is the same, it will be described only for one side of the press beam 16, wherein those on the opposite side of the press beam 16 arranged fastening device 32 is formed only in mirror image.
    FIG. 2 shows a first possible embodiment of the safety system 28 with its fastening device 32 in front view on the pressing beam 16. For the sake of simplicity, the individual component components have only been shown stylized simplified. In turn, the same reference numerals or component designations as in the preceding FIG. 1 are used for the same parts. In order to avoid unnecessary repetition, reference is made to the description in the preceding FIG. The basic concept and the structure of the fastening device 32 can be used both for the transmitting device 29 and for the detection device 30. Therefore, both reference numerals for both the transmitting device 29 and the detecting device 30 are shown in this figure.
    The fastening device 32 of the fastening unit 31 shown here comprises at least one flapping element 33 which, in turn, has a limp and oblong shape. Under limber is understood that a bending and deflection around a disc or the like. Easy and without effort is possible, but tensile forces can be transmitted. A transmission of compressive forces by means of the holding element 33 is not provided and should not take place.
    Thus, the at least one holding element 33 distanced from one another in the direction of its longitudinal extension has a first end region 34 and a second end region 35. In order to absorb tensile forces without significant longitudinal expansion, the at least one retaining element 33 should be formed zugsteif. Thus, for example, the at least one retaining element 33 can be selected from the group of ropes, belts, bands, cords, chains.
    Furthermore, the fastening device 32 also comprises an adjusting disc 36, which among other things serves to change the longitudinal course of the at least one retaining element 33. Thus, the at least one retaining element 33 can be deflected or deflected on the adjusting disc 36. The adjusting disc 36 is further arranged above the transmitting device 29 or the detection device 30 fixed. The adjusting disc 36 is in turn rotatable about an axis of rotation 37, wherein the axis of rotation 37 has a horizontal orientation. Depending on the intended use and operational condition, the adjusting disc 36 may indeed be rotatably mounted, but e.g. be prevented by a brake device, not shown on a free rotation. After releasing the brake device, the adjusting disk 36 can be rotated and, as a consequence, a vertical adjustment of the transmitting device 29 or the detection device 30 can be carried out. The arrangement and mounting of the adjusting disc 36 can take place directly on the upper pressing bar 16 or else with the interposition of a housing, not shown, or the like. Furthermore, due to the deflection or deflection of the at least one retaining element 33, the adjusting disk 36 can transmit a restoring force to the retaining element 33 on the static friction force and the angle of wrap formed thereby.
    The first end region 34 of the at least one retaining element 33 is connected either to the transmitting device 29 or to the detection device. Thus, a tensile force and / or a retaining force can be exerted or transmitted from the holding element 33 to the transmitting device 29 or the detection device 30. As a result of the suspended arrangement of the transmitting device 29 of the detecting device 30 on the holding element 33, these can each be held freely suspended relative to the pressing bar 16 on the holding element 33. Considering the longitudinal course of the holding element 33, this extends starting from the attachment point on the transmitting device 29 or the detection device 30 to the above arranged adjusting disc 36. After deflecting or deflecting the retaining element 33 on the adjusting disc 36, the second end portion 35 of the at least one retaining element 33 may be connected to a stationary at an anchor point held elastic traction element 38.
    The elastic tension element 38 serves to apply the holding element 33 at least on a portion of the adjusting disc 36 over a wrap angle and so for a possible drive movement sufficient static friction and static friction between the adjusting disc 36 and the holding member 33 can build. In order to be able to carry out a drive torque for the relative displacement of the transmitting device 29 or the detecting device 30 relative to the pressing bar 16, the adjusting disc 36 can be connected in terms of movement to a drive device 39. By means of the drive device 39, a torque can thus be transmitted to the adjusting disk 36, which then forms a drive disk or a drive element, further on the holding element 33 resting against it. At standstill of the drive device 39 and a rotation of the adjusting disc 36 should be suppressed so as to establish a relative stationary position with respect to the upper press bar 16. When the drive device 39 is blocked, the adjusting disc 36 is basically still in a rotational sense and is kept stationarily positioned. From the elastically formed tension member 38, a tensile force is applied to the retaining element 33, starting from this so as to press the retaining element 33 on at least a portion of the circumference of the adjusting disc 36.
    From the transmitting device 29 or the detection device 30, a weight force Fg is introduced into the first end region 34 of the holding element 33 in each case on the basis of their own mass. Since a further tensile force is introduced by the elastic tension element 38 on the retaining element 33 in its second end region 35, the retaining element 33 is pressed against the adjusting disc 36 in its contact region and a static frictional force is built up. Should a
    Adjustment and / or adjustment of the transmitting device 29 or the detection device 30 are performed, starting from the drive device 39 which is drivingly connected adjusting disc 36 to drive, depending on the selected direction of rotation, raising or lowering of the transmitting device 29 or the detection device 30 relative to the upper press bar 16 takes place. If the adjustment process is completed, the transmitting device 29 or the detection device 30 each remains stationary with respect to the upper press beam 16.
    In the course of the bending process to be performed, the upper press beam 16 is adjusted in the direction of the press beam 13 arranged therebelow. If the transmitting device 29 or the detection device 30 during simultaneous downward movement with the upper pressing beam 16 to a plant on an object or a body part of an operator, due to the pliable design of the holding member 33 no additional pressure force from the upper press bar 16 to the transmitting device 29 or the detection device 30 are exercised. Thus, in the event of a collision with a previously described foreign body, only the transmission of that force, which results from the intrinsic mass of the transmitting device 29 or the detection device 30, occurs in the maximum case. The intrinsic mass of the transmitting device 29 or the detection device 30 also includes the intrinsic masses of possible guide elements, housings or the like, which are to be received by the holding element 33 together with the transmitting device 29 or the detection device 30.
    The tensile force exerted by the elastic traction element 38 on the holding element 33 also serves as counterbalance with respect to the net mass of the transmitting device 29 or detection device 30. The tensile force of the elastic traction element 38 applied or generated should be equal to or less than that of the net mass of the transmitting device 29 or detection device 30 be exercised weight. The lower and thus smaller value of the built-up tensile force can be, for example, in a value range with a lower value of 30% and an upper value of 60% of the weight of the net mass of the transmitting device 29 or detection device 30.
    Regardless of this, it would also be possible, instead of the elastic tension element 38, to connect the second end region 35 of the at least one retaining element 33 to a counterweight body 40. This is indicated in dashed lines. Thus, a weight balance and a secure pressing or applying the holding member 33 on the circumference or a partial circumference of the adjusting disc 36 can be effected. In this case, also the counterweight body 40 should have a net mass, which is equal to or smaller than the net mass of the transmitting device 29 or the detection device 30. The constructed by the net mass of the counterweight body weight should be within the same limits, as has been previously described for the tensile force built up by the elastic tension member 38.
    The elastic tension element 38 described above may be selected, for example, from the group of spring roll, coil spring, coil spring, rubber band, gas spring, pneumatic cylinder, hydraulic cylinder. In the choice of cylinders they should not be controlled, but be biased only with the actuating means.
    It is further indicated here that the fastening device 32 can also comprise a guide device 41. By means of the guide device 41, the transmitting device 29 or the detection device 30 for performing the adjustment and / or Justiervorgänge be performed. The guide direction is carried out in particular in the vertical direction. In addition, the guide device 41 can also serve to damp or completely prevent oscillation of the transmitting device 29 or the detection device 30, since these are basically arranged freely suspended on the holding element 33 up to the adjusting disc 36. Furthermore, but also a rotationally free mounting on at least one holding element 33 can be achieved. The possible adjustment movement or adjustment direction of the transmitting device 29 or the detection device 30 is indicated by a double arrow.
    FIG. 3 shows a second possible embodiment of the safety system 28 with its fastening device 32 in front view on the pressing beam 16. For the sake of simplicity, here too the individual component components have been simplified in stylized form. Furthermore, the same reference numerals or component designations as in the preceding FIGS. 1 and 2 are again used for the same parts. In order to avoid unnecessary repetition, reference is made to the description in the preceding FIGS. 1 and 2 or referenced. The basic concept and the structure of the fastening device 32 can be used both for the transmitting device 29 and for the detection device 30. Therefore, both reference numerals for both the transmitting device 29 and the detecting device 30 are shown in this figure.
    The fastening device 32 of the fastening unit 31 shown here again comprises at least one retaining element 33 with its first end region 34 and its second end region 35. Furthermore, the fastening device 32 also comprises the adjusting disk 36, which in turn is in driving connection with the drive device 39. The first end portion 34 of the holding member 33 is connected to the transmitting device 29 or the detecting device 30. The second end portion 35 is after the deflection of the at least one holding member 33 with the counterweight body 40 in connection. Also possible in turn is the arrangement of a guide device 41 for the transmitting device 29 or the detection device 30.
    For additional deflection or deflection of the at least one retaining element 33, a deflection pulley 42 is provided here in addition to the adjusting disc 36. The deflection pulley 42 is freely rotatable about its own rotation axis 43, the further rotation axis 43 having a parallel orientation with respect to the rotation axis 37 of the adjustment disk 36.
    The at least one holding element 33 extends first, starting from the transmitting device 29 or the detecting device 30 in the vertical direction upwards to the deflection plate 42 and is deflected at this in the direction of the adjusting disc 36. Depending on the relative position of the deflecting plate 42 with respect to the adjusting disc 36, a wrap angle 44 of the holding element 33 can be fixed to the adjusting disc 36.
    In the present embodiment, either the transmitting device 29 and the counterweight body 40 each have the same net mass or the detecting device 30 and the counterweight body 40. Since the weight force generated by the transmitting device 29 or the detecting device 30 is equal to the weight force generated by the counterweight body 40, this is respectively entered with an arrow labeled "Fg". Due to the friction coefficient or friction coefficient, the static friction force acting between the retaining element 33 and the adjusting disk 36 can be determined as a function of the value of the wrap angle 44.
    If, for example, the transmitting device 29 or the detection device 30 is lifted relative to the deflecting disk 42, this leads to a reduction of the above-described built-up static friction force on the adjusting disk 36. The opposing force is indicated by an arrow labeled "Fa". Depending on the performed reduction of the weight of the self-mass of the transmitting device 29 or the detection device 30 generated weight ("Fg" - "Fa"), depending on the selected value of the wrap 44 also reduces the static friction force, whereby the equilibrium ratio between the transmitting device 29th or the detection device 30 and the counterweight body 40 is no longer given. Thus, the holding member 33 slip on the rotationally fixed adjusting disc 36 and the transmitting device 29 or the detection device 30 is adjusted upwards in the direction of the order steering disc 42. As a result of this sliding action and if the static friction force is not reached, the weighting force of the transmitting device 29 or the detection device 30 is increased further in the direction of the deflection pulley 42 and the counterweight body 40 is lowered to the same extent.
    In the present embodiment, the order is steering wheel 42 with respect to the longitudinal course of the at least one holding element 33 between its first
    End portion 34 and its second end portion 35 of the adjusting disc 36 upstream. Seen in the vertical direction, the deflection plate 42 is higher and thus arranged above the adjusting disc 36.
    FIG. 4 shows a further possible embodiment of the safety system 28 with its fastening device 32 in front view on the pressing beam 16. This is very similar in its construction to the embodiment previously described in FIG. Therefore, only the different arrangement of component components to each other is discussed in more detail.
    For the sake of simplicity, here too the individual component components have been simplified in stylized form. Furthermore, the same reference numerals or component designations as in the preceding FIGS. 1 to 3 are again used for the same parts. To avoid unnecessary repetition, reference is made to the description in the preceding Figs. 1 to 3 or reference. The basic concept and the structure of the fastening device 32 can be used both for the transmitting device 29 and for the detection device 30. Therefore, both reference numerals for both the transmitting device 29 and the detection device 30 are also entered here in this figure.
    The fastening device 32 of the fastening unit 31 shown here likewise comprises at least one flanging element 33 with its first end region 34 and its second end region 35. Furthermore, the fastening device 32 also comprises the adjusting disk 36, which in turn is in driving connection with the drive device 39. The first end portion 34 of the holding member 33 is connected to the transmitting device 29 or the detecting device 30. The second end portion 35 is after the deflection of the at least one Flalteelements 33 with the counterweight body 40 in connection. Also possible in turn is the arrangement of a guide device 41 for the transmitting device 29 or the detection device 30.
    Flier is provided, in contrast to the arrangement previously described in FIG. 3, that the deflection pulley 42 is arranged downstream of the adjusting disc 36 with respect to the longitudinal course of the at least one retaining element 33 between its first end region 34 and its second end region 35. Thus, the adjusting disc 36 is seen directly in the vertical direction above the transmitting device 29 or the detection device 30. Again, in turn, by the relative position in the vertical direction of the adjusting disc 36 and the order steering disc 42 to each other of the wrap 44 fixed to the control disc 36 and thus the static friction force can be determined. The two axes of rotation 37 and 43 each have in turn a horizontal orientation and are arranged to run parallel to each other. By distancing in the horizontal direction to each other on the one hand, the width can be influenced and set in "X" direction. By means of the driven disk 39 connected to the driving device 39, on the one hand, a rotary positional fixing of the adjusting disk 36 can take place and, when driving, the setting and / or adjusting operation described above can be carried out.
    To carry out the above-described adjustment and / or Justiertätigkeiten the transmitting device 29 and the detection device 30 to each other and their predetermined correct position with respect to the working or bending region of the punch or 5, each of the drive devices 39 with the control device 24 and optionally also with the Input terminal 25 are in communication.
    Furthermore, it is still possible to arrange each of the fastening devices in an unspecified housing and to arrange this in each case at an outer end face region of the upper press beam 16, in particular to fasten it.
    The embodiments show possible embodiments, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action by representational invention in Can the expert working in this technical field.
    The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or combinations of features from the illustrated and described different embodiments may represent for themselves inventive solutions. The task underlying the independent inventive solutions can be taken from the description. All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.
    For the sake of order, it should finally be pointed out that for a better understanding of the construction, elements have been shown partially unevenly and / or enlarged and / or reduced in size.
    REFERENCE SIGNS LIST 1 Production plant 31 Fastening unit 2 Workpiece 32 Fastening device 3 Bending press 33 Holding element 4 Bending tool 34 First end region 5 Bending punch 35 Second end region 6 Bending die 36 Adjusting disk 7 Machine frame 37 Rotary axis 8 Base plate 38 Tension element 9 Sidewall 39 Drive device 10 Sidewall 40 Counterweight body 11 Transverse dressing 41 Guide device 12 Front end face 42 Deflection pulley 13 Pressing beam 43 Rotary axis 14 Front end face 44 Wrap angle 15 Linear guide 16 Pressing bar 17 End face 18 End face 19 Tool holder 20 Tool holder 21 Drive arrangement 22 Drive means 23 Energy network 24 Control device 25 Input terminal 26 Spindle drive 27 Adjusting means 28 Safety system 29 Transmitting device 30 Detecting device
    权利要求:
    Claims (12)
    [1]
    A security system (28) for a manufacturing plant (1) for bending or stamping of a sheet metal workpiece (2) by means of a bending press (3), comprising a transmitting device (29) for emitting at least one light beam, a detection device (30) for receiving the at least one light beam, a fixing unit (31) each having a fastening device (32) for the transmitting device (29) and the detection device (30) for fixing the transmitting device (29) and the detection device (30) from each other spaced end region of an upper press beam (16) of the bending press (3), characterized in that the fastening device (32) at least one holding element (33), which at least one holding element (33) is slippery and elongated and spaced apart in its longitudinal extent a first end portion (34) and a second end portion (35) that the Befestigungsvorrichtu ng (32) further comprises an adjusting disc (36), which adjusting disc (36) above, in particular in the vertical direction above, the transmitting device (29) or the detection device (30) is fixedly arranged, and the adjusting disc (36) about an axis of rotation ( 37) is rotatable with a horizontal orientation, that the first end region (34) of the at least one holding element (33) is connected to the transmitting device (29) or the detection device (30), that the at least one holding element (33) on the adjusting disc (33). 36) is deflected or deflected, and that the second end region (35) of the at least one retaining element (33) is connected to a counterweight body (40) or to an elastic tension element (38) held stationary at an anchor point.
    [2]
    2. Safety system (28) according to claim 1, characterized in that the at least one retaining element (33) is tension-resistant, in particular strain-resistant, is formed.
    [3]
    3. Security system (28) according to claim 1 or 2, characterized in that the at least one holding element (33) is selected from the group of ropes, belts, bands, stokes, chains.
    [4]
    4. Safety system (28) according to any one of the preceding claims, characterized in that the counterweight body (40) has a net mass which is equal to or smaller than the net mass of the transmitting device (29) or the detection device (30).
    [5]
    5. Safety system (28) according to any one of the preceding claims, characterized in that the elastic tension element (38) from the group of scroll spring, coil spring, coil spring, rubber band, gas spring, pneumatic cylinder, hydraulic cylinder is selected.
    [6]
    6. Safety system (28) according to any one of the preceding claims, characterized in that the adjusting disc (36) with a drive device (39) is in drive connection.
    [7]
    7. Security system (28) according to any one of the preceding claims, characterized in that the fastening device (32) in addition to the adjusting disc (36) comprises a deflection disc (42) on which deflecting plate (42), the at least one holding element (33) also deflected or is diverted.
    [8]
    8. Security system (28) according to claim 7, characterized in that the deflection disc (42) with respect to the longitudinal course of the at least one holding element (33) between its first end portion (34) and its second end portion (35) of the adjusting disc (36) is arranged upstream ,
    [9]
    9. Safety system (28) according to claim 7, characterized in that the deflecting disc (42) is arranged downstream of the adjusting disc (36) with respect to the longitudinal course of the at least one retaining element (33) between its first end region (34) and its second end region (35) ,
    [10]
    10. Security system (28) according to any one of claims 7 to 9, characterized in that both the adjusting disc (36) and the deflection disc (42) with respect to the longitudinal course of the at least one holding element (33) between its first end portion (34) and its second end portion (35) on the same side of the holding element (33) are arranged.
    [11]
    11. Security system (28) according to any one of the preceding claims, characterized in that the fastening device (32) further comprises a guide device (41), by means of which guide device (41), the transmitting device (29) or the detection device (30) out, in particular vertical direction, is.
    [12]
    12. Production plant (1), in particular for the bending or embossing bending of a workpiece to be produced from a sheet metal (2), comprising - a bending press (3), in particular a press brake, with a machine frame (7), a lower pressing beam (13), an upper pressing bar (16) and tool holders (19, 20) arranged or formed on the pressing bars (13, 16), - at least one bending tool (4) with at least one bending punch (5) and at least one bending die (6), - a security system (28) with a transmitting device (29), a detection device (30) and a fixing unit (31) each having a fastening device (32) for the transmitting device (29) and the detection device (30), wherein - the fastening assemblies (32) respectively at upper pressing bar (16) spaced from each other in a front end region thereof are arranged, characterized in that - the safety system (28) according to one of the preceding claims is formed.
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    同族专利:
    公开号 | 公开日
    EP3372319B1|2019-10-30|
    AT519646B1|2018-09-15|
    EP3372319A2|2018-09-12|
    EP3372319A3|2018-09-26|
    引用文献:
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    JPS52101082U|1976-01-29|1977-08-01|
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    AU2008249222A1|1996-01-05|2008-12-18|Appleyard, Thomas John|Optical safety device for mounting on a moving member|
    JPH09192744A|1996-01-08|1997-07-29|Amada Co Ltd|Photoelectronic safety device for bending device|
    DE19717299A1|1996-08-20|1998-02-26|Fiessler Elektronik Wolfgang F|Laser control for cutting machine tool|
    EP1319886A2|2001-12-13|2003-06-18|Fiessler Elektronik OHG|Protective device for machines such as bending presses, cutting machines, punching machines or the like|
    DE102005035889A1|2005-07-30|2007-02-01|Fiessler Elektronik Gmbh & Co. Kg|Protective device for machines, such as press brakes, cutting machines, punching machines or the like|
    EP2431650A1|2010-09-20|2012-03-21|Bystronic Laser AG|Safety system for operational safety for machines, in particular folding presses|
    AUPN744696A0|1996-01-05|1996-02-01|Appleyard, Thomas John|Safety apparatus and protection method for machines|
    DE10342431A1|2003-09-13|2005-04-07|Fiessler Elektronik Ohg|Protective device for machines, such as press brakes, cutting machines, punching machines or the like|
    WO2006135961A1|2005-06-20|2006-12-28|Lazer Safe Pty Ltd|Imaging and safety system and method for an industrial machine|CN110834079A|2019-10-24|2020-02-25|合肥常青机械股份有限公司|Stamping type metal casting die|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50186/2017A|AT519646B1|2017-03-09|2017-03-09|Safety system for a manufacturing plant|ATA50186/2017A| AT519646B1|2017-03-09|2017-03-09|Safety system for a manufacturing plant|
    EP18160705.2A| EP3372319B1|2017-03-09|2018-03-08|Safety system for a production system and such a production sytem|
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