EP1987899A1 - Bending machine with recess to leave room for feet - Google Patents

Abstract

The bending press (1) has a stationary lower pressing beam (12) or pressing table and an upper pressing beam (10), which is adjusted relatively to the lower pressing beam or pressing table by an adjusting drive unit (11). The lower pressing beam, the pressing table, a machine table or machine frame (13) supporting the lower pressing beam is provided with a cavity (5) that forms a foot space (6) for an operator on the operator side (3) of the bending press.

Description

The invention relates to a bending press, in particular a press brake, according to the preamble of patent claim 1.

Bending presses, in particular press brakes, are today used in large numbers for the production of bent parts, mainly using the bending methods of bending, stamping or three-point bending. In order to apply the occurring, often very large bending forces without undue deformation of the bending machine, such machines have very solid press beams and press tables, whereby a high bending accuracy is ensured even for larger workpieces and larger sheet thicknesses. The lower press beam or press table is usually designed as a solid, solid plate, which has the highest possible flexural rigidity. Furthermore, there are embodiments in which the lower pressing beam or press table recesses or slots, which allows a deformation corresponding to a bending deformation of an upper press beam. All these designs have in common that these bending machines or press brakes are designed for an operation while standing, while a sitting operation is complicated by the formation of the lower press beam or the press table, as there is no sufficient space for the legs and feet of a user is. When operating such a machine while sitting, therefore, body postures are taken in which the upper body is partially strongly inclined forward or laterally twisted, since the legs are rotated laterally approximately parallel to the front of the press. Such postures, however, are extremely tiring for the user of the press brake, which may decrease production efficiency or often require rest periods, thereby degrading the productivity of such a press brake.

The object of the invention is to provide a bending press, in particular a press brake, which has favorable ergonomic conditions both for operation while standing, as well as sitting and allows fatigue-free working possible.

The object of the invention is achieved by a bending press, in particular a press brake, with the features of patent claim 1. Through a recess in the lower press beam or press table or a machine table or machine frame supporting the lower press beam For example, in normal sitting posture, an operator of the bending press may place the head, shoulders and arms within the normal operating distance of the bending press flexure plane extending between the bending tools and thereby provide higher production rates through less effort. Furthermore, the reduced fatigue of the operator significantly reduces the risk of accidents at work.

If the recess has a horizontal inside width of at least 500 mm, in particular of at least 750 mm, the foot space or legroom is suitable for comfortably receiving both feet or legs of the operator.

Alternatively, two mutually spaced recesses may be arranged, each having a horizontal clear width of at least 200 mm, wherein for each foot or each leg a separate footwell or legroom may be formed or through the recesses access to an underlying contiguous footwell is formed. Between the two recesses, a support element with a width between 50 mm and 250 mm can be arranged, which is suitable for forming a vertical support for the lower pressing beam or the press table between the recesses, whereby the rigidity increases compared to a coherent large recess is.

The recess advantageously has a horizontal depth of at least 250 mm, in particular 450 mm, preferably 600 mm, measured from the front edge of the recess lying on the operating side. This depth of the recess allows a sufficient approach of the upper body of the operator to the working plane of the bending press, wherein at the greater depths, a change in the leg position, for example by stretching the knee of the operator is at least partially possible, whereby fatigue phenomena are even better avoided. Sufficient approximation of the operator's upper body to the bending plane or working plane can also be achieved by projecting the recess at least 200 mm behind the bending plane of the pressing bars, which also achieves a sufficient depth of the foot space.

The vertical clear height of the recess is advantageously at least 650 mm, preferably 750 mm, in the middle, as a result of which there is also sufficient leg space for average leg lengths in terms of height.

An upper boundary surface of the recess may in this case have a vault-like rounding region, as a result of which the clear height of the recess decreases toward the lateral edges with respect to the center, whereby the recess is adapted to the height requirement, which likewise decreases in lateral displacement of the legs. Furthermore, a vault-like execution of the rounding area is well suited to ablate the pressure forces occurring on the lateral bearing points when the upper boundary surface of the recess is formed from the underside of the press beam.

The recess can also be formed by the fact that the lower pressing beam is fastened with its ends to lateral cheeks of a machine frame or a machine frame. A particularly reliable removal of the compressive forces occurring on the lower pressing beam is achieved when the ends of the press beam rest in corresponding recesses on the lateral cheeks of the machine frame.

Since the working height of the bending press or press brake is increased compared to a normal seating workstation, it is advantageous if in the recess a relative to the footprint of the bending press increased footrest is arranged. The upper body of the operator can be brought by a correspondingly elevated work chair at the same height as in a standing posture and the support of the legs are made possible by the increased footrest.

The footrest can in particular be adjustable in height and adjustable in its inclination, whereby an adaptation to different leg lengths is possible.

A further simplification for the operator is when a foot-operated foot switch connected to a control device of the press brake is disposed in the recess, whereby the foot for actuating the foot switch need not be removed from the recess. A possible improvement is also when the foot switch by means of an adjusting device and a fixing device different positions within the recess, in particular on the footrest in the interior of the recess is fixed. The adaptation to different foot positions or leg positions is thereby easily possible, wherein the fixing device ensures that the foot switch does not unintentionally change its position during use. The adjusting device and the fixing device can also be combined, for example in the form of an adjusting rail on which the foot switch can be locked in different positions, wherein the fixation can be done by a spring-loaded element.

A further advantageous embodiment of the bending press, which prevents premature fatigue of an operator, is characterized in that front lighting illuminating the working space between the upper pressing beam and the lower pressing beam is arranged in front of the bending plane. As a result, good visibility conditions are given to the press arranged in the press bars and the respective workpiece to be machined for the operator. The front lighting is preferably arranged in front of and above the upper press beam.

It is likewise advantageous if, behind the working plane, a rear room lighting which is illuminated in the working space behind the lower pressing beam, in particular on a backgauge device, is arranged. In particular, when using a backgauge device, it is important for the operator to have good visibility in this area, since a high dimensional accuracy of the bent parts is achieved only with accurate concerns of the workpieces to be bent on stop elements of the backgauge. By equipping a bending press with a front lighting or backlighting premature fatigue of the operator is significantly reduced by poor visibility and consequent increased concentration.

In order to achieve constant lighting conditions over the working width of a bending press, it is advantageous if the front room lighting or the rear room lighting is formed by a light bar which is at least approximately parallel to the pressing bars.

A further advantageous embodiment of the bending press is that the front room lighting or the rear room lighting is integrated in the interior of a stationary machine housing and this at least one light exit opening, in particular a light exit slot having. By installing the front lighting or rear lighting in the interior of the machine housing this is well protected against accidental damage by workpiece handling or other activities on the bending press and by the positioning of the light exit opening and the light exit slot The light propagation can be designed in such a way that at the same time a good illumination of the work area and a small glare of the operator is achieved.

The rear room lighting may further comprise or be formed by a luminous marking device, wherein the luminous marking device can attach a luminous marking to a rear stop element from a group of several rear stop elements by means of an adjusting device. In the event that the backgauge device comprises a plurality of backgauge elements in different positions, it is a simplification for the operator if the backgauge element to be used is easily recognizable by a luminous marking without having to look away from the working space, such as the backgauge element to be used to take a bending plan.

For this purpose, the adjusting device of the luminous marking device can in particular be communicatively connected to the control device controlling the backgauge device and the luminous marking can be positioned by the adjusting device in each case onto the backstop element intended for use by the control device. This is particularly advantageous when several backgauge elements are used in a bending sequence for complicated bending processes. The adjusting device of the luminous marking device advantageously comprises a stepping motor, which can perform an accurate positioning of the luminous marking, based on the control signals of the control device.

The illuminant of the front room lighting or the back room lighting can be selected from a group comprising incandescent lamps, halogen lamps, fluorescent tubes, xenon lamps, light-emitting diodes or laser lamps, wherein a laser lamp is particularly well suited as a light source for generating the illuminated marking.

A further possibility to achieve advantageous lighting conditions in the work space is when the light intensity of the front room lighting or the rear room lighting is variable by means of a lighting control device. This can include an electronic circuit with which, for example, the luminous intensity of the light source can be adjusted or can be switched between different light sources or numbers of bulbs.

The bending press may further comprise a luminous marking device with which a bending line marking lying in the bending plane, in particular on the top of a workpiece positionable between a bending die attached to the lower pressing beam and a bending punch mounted on the upper pressing beam, can be mounted. For the operator, such a bending line marking is a relief in the positioning of particular large workpieces.

Another possible embodiment of the bending press to prevent premature fatigue of the operator is that a shelf with a storage surface is arranged in front of the lower pressing beam. This storage surface can be used on the one hand to provide workpieces to be machined or already curved workpieces, measuring or testing equipment or other objects in the immediate gripping area of an operator, thereby tiring, possibly unnecessary movements omitted for the operator.

To adapt to the workflow or physical conditions of the operator, it is advantageous if the tray is positionable by means of an adjustment arrangement and a fixing device in different positions with respect to the lower press beam. In particular, an adjustability in height direction can be significant for different body sizes of the operator or for different workpiece sizes. Since the tray could be disturbing in some bending operations, it is also advantageous if the tray between a working position and a rest position is adjustable, in particular about a substantially horizontal axis of rotation is pivotally mounted on the lower beam or press table. If necessary, the shelf can simply be folded downwards, thereby creating the space required for certain bending operations.

In order to obtain a sufficient support surface for small to medium metal sheets or curved workpieces, the support surface in approximately horizontal working position a transversely oriented to the lower pressing beam depth of at least 150 mm. The width of the storage area can correspond to the entire working width of the bending press. Shelves with greater depth can also have a recess for the upper body of the operator, as this would be brought by a shelf with greater depth again in a non-ergonomic distance to the working plane of the press brake.

Furthermore, in front of the lower pressing beam, in particular on the tray, an elbow pad may be arranged, by means of which the operator's upper arms and shoulder belt are relieved during operation on the bending press. The elbow pad is, in order to avoid pressure points on the elbows or forearms, carried out advantageous padded, for example with a plastic foam.

An ergonomic height of the shelf is achieved when this is placed in working position between 0 mm and 150 mm below the upper edge of the lower press beam. This height can, as already mentioned above, be variable by an adjusting device.

Another user-friendly embodiment of the bending press is that a control panel interacting with the control device of the bending press is arranged on the operating side on the stationary machine housing above the upper press beam. The height arrangement is selected so that arranged on the control panel controls and an optional screen are located approximately at eye level of the operator or slightly above.

In order to be able to perform an adaptation to physical conditions of the operator here as well, the control panel can be positioned by an adjusting device in different positions with respect to the machine housing; In particular, the control panel can be pivoted by the adjusting device about a substantially horizontal pivot axis. The controls and a screen can be optimally adapted to an operator sitting on the operating side or standing.

The invention will be explained in more detail below with reference to the embodiments illustrated in the drawings.

Fig. 1

eine perspektivische Darstellung einer erfindungsgemäßen Biegepresse von der Bedienseite her;

Fig. 2

einen Vertikalschnitt durch eine Biegepresse gemäß Fig. 1;

Fig. 3

eine Teilansicht einer weiteren Ausführungsform einer erfindungsgemäßen Biegepresse;

Fig. 4

eine Teilansicht einer weiteren Ausführungsform einer erfindungsgemäßen Biegepresse.

In each case, in simplified, schematic representation:

Fig. 1

a perspective view of a bending press according to the invention from the operating side;

Fig. 2

a vertical section through a bending press according to Fig. 1 ;

Fig. 3

a partial view of another embodiment of a bending press according to the invention;

Fig. 4

a partial view of another embodiment of a bending press according to the invention.

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 are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions 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.

Fig. 1 shows a perspective view of a bending press 1 according to the invention in the form of a press brake 2, which on its side facing the operator 3, which also forms the front 4 of the bending press 1, a recess 5 according to the invention, which forms a footwell 6 for an operator.

The bending press 1 in the form of a press brake 2 comprises, as in conventional bending presses, a bending tool 7, which consists of an upper tool in the form of a bending punch 8 and a lower tool in the form of a bending die 9 is. The bending punch 8 is attached to an adjustable upper pressing bar 10, which by means of an in Fig. 1 invisible adjusting drive 11 relative to a bending die 9 supporting fixed lower pressing bar 12 is adjustable. The lower pressing beam 12 is firmly connected to a stable machine frame 13, which forms the basic structure of the bending press 1. In the illustrated embodiment, the lower pressing beam 12 with its end portions 14 and 15 with side cheeks 16, 17 of the machine frame 13 is firmly connected. The end portions 14 and 15 are inserted into matching recesses on the cheeks 16 and 17 and welded to them stably.

At an in Fig. 1 not shown embodiment, the lower clamping bar 12 also, as in conventional press brakes be designed as a press table, which extends at least approximately up to a footprint 18 of the press brake 1. According to the invention, the latter then likewise has a recess 5, which forms a foot space 6 in the bending press 1. Likewise, the lower pressing beam 12 may be mounted on its own machine table, which then also has a recess 5 according to the invention or a foot space 6 which is accessible in the interior of the machine frame. In order to provide sufficient foot space 6 for the legs of a front press brake operator, the recess 5 has a horizontal clear width 19 of at least 500 mm, in the exemplary embodiment about 900 mm; a horizontal depth 20 in the interior of the machine frame 13 of at least 250 mm, increasing in the embodiment from 450 mm in the upper region to about 750 mm in the bottom region and a vertical clear height 21 of at least 650 mm, in the exemplary embodiment 750 mm. The recess 5 or the thus accessible footwell 6 thereby offers sufficient space to arrange an average-sized operator both legs or feet below the lower press beam 12 in a seated posture.

An upper boundary surface 22 of the recess 5 is formed in this embodiment by the bottom 23 of the lower press beam 12. The press beam 12 thus has the maximum vertical height and thus also flexural rigidity for a given size of the recess 5. In addition, the bottom 23 of the lower beam 12 and thus also the upper boundary surface 22 of the recess 5 is designed as a vault-like rounding area 24, which is well suited to remove the introduced during the bending process in the lower beam 12 compressive forces in the machine frame 13.

In the illustrated embodiment, the footwell 6 is laterally bounded by the inner surfaces of the lateral cheeks 16, 17 of the machine frame 13; the rearward or upward limit is provided by a footwell guard 25 which adjoins the underside 23 of the lower beam 12 and which clamps the feet and legs of an operator seated on the press brake 1 against objects unintentionally falling behind the lower beam 12, e.g. Workpieces or tools, protects and at the same time contribute to increasing the rigidity of the machine frame 13.

Fig. 1 further shows a shelf 26 attached to the lower press beam 12, which provides the operator with a shelf 27 for storing workpieces, tools or other objects to be bent or bent. The tray 26 may consist of a in Fig. 1 dargstellten working position with approximately horizontal shelf 27 are pivoted about a horizontal axis of rotation 28 down to a rest position, for example, to increase the bending clearance in front of the lower beam for certain bending operations. In the horizontal working position, the support surface 27 has a depth 29, oriented at right angles to the lower pressing beam 12, of at least 150 mm, preferably 250 mm. The tray 26 may be further positioned and held by means of an adjustment assembly 30 and a fixing device 31 in different positions of the lower press beam 12, whereby, inter alia, an adjustment to physical conditions or preferences of the operator is possible. The adjustment is in the illustrated embodiment in a vertical adjustment of the tray 26, but it is also conceivable that in addition a horizontal adjustment is given by appropriate guides. To relieve the upper arms and the shoulder area of the operator 27 additional elbow pads 32 are arranged on the shelf, which are padded, for example, with an elastically resilient plastic foam, thus allowing a comfortable resting of the forearms, which also reduces the fatigue of the operator.

The drive device 11 and the majority of the upper press beam 10 in the raised rest position is covered with a fixed machine housing 33, which protects the operator on the one hand from the moving parts of the drive device 11, and provides space for the installation of other machine components.

Approximately at eye level of an operator standing in front of the bending press 1 or seated in an elevated position, an operating panel 34 is integrated in the machine housing 33, which in the illustrated embodiment comprises a display screen 35 as well as a plurality of operating elements 36. The control panel 34 is connected to a control device 37, with which the functions of the bending press 1 or press brake 2 are controlled. Since the control panel 34 is in the immediate field of view and gripping area of an operator located in front of the bending press 1, the operation of the control device 37 without tiring additional movements of the operator can be done and the production capacity can also be increased. In Fig. 1 not shown is an adjusting device by which the control panel is adjustable about a substantially horizontal pivot axis and thereby optimally adapted to the operator.

Fig. 1 further shows a front lighting 38, which is also integrated in the machine housing 33 and in the working space 39 in the region of the bending tools 7 lights. This good illumination of the central working area facilitates the optical detection of the workpiece and tools, which also reduces fatigue for the operator.

The front lighting 38 includes one or more lamps 40, such as a fluorescent tube, light emitting diodes, incandescent bulbs or other bulbs, with which the work area can be sufficiently and evenly lit, the light emitted by this light the machine housing by a light exit opening 41, for example in the form of a Light exit slot 42, leaves. The direction of the light radiation is chosen so that a person standing in front of the bending press 1 or sitting user is not dazzled in normal posture. The light intensity of the front lighting 38 can be changed by a not shown light-emitting device control device. In order that the working space 39 can be uniformly illuminated over the entire possible working width of the bending press 1, the lighting means 40 can also be embodied in particular as a light bar parallel to the pressing bars 10, 12.

Fig. 1 further shows two shields 43, 40, which prevent a lateral approach to the danger area of the bending press 1.

Fig. 2 shows a section through a bending press 1 or press brake 2 according to the embodiment in Fig. 1 , wherein the cutting surface of the operating side 3, which corresponds to the front side 4 of the bending press 1, extends to a rear side 44 of the bending press 1. The machine frame 13 essentially comprises the lateral cheeks 16, 17, which are connected by a plurality of transverse parts, as well as the lower pressing beam 12, whereby a high rigidity of the machine frame 13 is ensured. Thus, for example, in the area of the footprint 18, a lower cross member 45 is disposed at the upper portion of the back 44, an upper cross member 46 of the back 44, and a plurality of inner cross members 47. The cross members 45, 46, 47 are plate-shaped in the illustrated embodiment, whereby this can be connected with the lateral cheeks 16, 17 with long welds. Of the plate-shaped inner transverse members 47 extend two approximately in the vertical direction and in an approximately horizontal direction, wherein at this a drive device 48 of the force acting on the upper beam 10 adjusting drive 11, for example in the form of a hydraulic cylinder 49, is attached. The drive device 48, here in the form of a hydraulic cylinder 49, is thus supported on the fixed horizontal inner transverse part 47, wherein a movable drive element of the drive device 48 is connected to the upper press beam 10. The adjusting drive 11 for the upper pressing beam 10 further comprises a guide arrangement 50 with a fixed guide track on the machine frame 13, here in the form of two guide rails 51 fastened to the lateral cheeks 16, 7 and guide elements which are adjustable along the guide track and connected to the upper pressing beam 10 , here in the form of guide slide 52. On the operating side 3, the moving parts of the drive device 48 and the majority of the upper press beam 10 are disguised in the rest position with the stationary machine housing 33.

In the machine housing 33, a front room lighting 38 is integrated, which is a lighting means 40, for example in the form of a fluorescent tube, one or more incandescent or light emitting diodes for illuminating the front working space 39, which extends substantially in front of the bending plane extending between the lower pressing bars 12 and upper pressing bars 10 53 is located. Since the luminous means is arranged in the interior of the machine housing 33, a light exit opening 41 is arranged here in the form of a light exit slot 42. The light exit opening 41 is arranged so that a person sitting or standing in front of the bending press 1 operator is not dazzled; the light exit opening 41 can also be changed, for example, by a diaphragm. The through the front lighting The resulting good illumination of the immediate bending area facilitates visual perception for the operator and helps to delay fatigue. When viewed from the operator behind the bending plane 53, a rear lighting 54 is further arranged, which lights up in the rear working space 55. In this case, the rear working space 55 can be uniformly illuminated, for example, like the front working space 39, but the rear space lighting 54 can be designed such that it effects only a line-shaped or dot-shaped luminous marking 56 on an object located in the rear working space 55. For this purpose, a narrow light band or a light fan or a light beam is emitted into the rear working space 55 by a light source 57 itself or by a light aperture connected downstream of the light source 57. The luminous marking 56 can be used to form a non-physical optical stop line for a workpiece to be bent or to mark a stop element 59 arranged on a backgauge device 58 for the exact positioning of a workpiece. This is a relief for the operator, especially when two or more stop elements 59 are arranged on the backstop device 58, and the operator alone can recognize by the luminous marking 56 which of the stop elements 59 he has to use for the bending process to be performed. Thus, for example, on a stop finger 60 of the backgauge device 58, which has two stop edges lying one behind the other, the luminous marking 56 can be directed to the correct stop edge to be used. Since the stop elements 59 and a stop finger 60 can be adjusted as desired by numerically controlled axes in the rear working space 55, the luminous marking 56 is also made adjustable, for example by the illuminant 57 or a light aperture by means of an adjusting device 61, for example in the form of a stepping motor 62 also is adjustable. Thus, for example, by a light source 57, which extends in the form of a light bar substantially over the entire working width of the bending press 1, rotatably mounted about its longitudinal axis and be driven by the stepper motor 62, which can spend a linear luminous marking 56 to the required position. The light-emitting means 57 can also be formed by a line laser, for example, which likewise can bring about a clearly visible line-shaped light marking in the rear work space 55. The luminous means 57 and the adjusting device 61 together form a luminous marking device 63 which is in particular communicatively connected to a control device which controls the backgauge device 58 and which is described in more detail as a result.

In addition to the described headlamp illumination 38 and the backlit illumination 54, the bending press may include another luminescent marking device 64 with which a bending line marker 65 lying in the bending plane 53 can be mounted on top of a workpiece positioned between the bending die 9 and the bending punch 8. This allows the operator to know, even before the bending process, where the bending edge will occur on the workpiece. The light marking device 64 can be formed in particular by a line laser 66, which, as in FIG Fig. 2 however, an arrangement of the luminous marking device 64 can be arranged laterally of the pressing bars 10, 12, whereby a plane light fan emanating from the luminous marking device 64 can coincide with the bending plane 53 and differences in the thickness of the workpieces to be bent cause no displacement of the bending line marking 65 transverse to the bending plane 53, as would be the case with a light fan inclined to the bending plane 53.

For the front lighting and the back room lighting a bright daylight white lighting is recommended, with other colors of light may be advantageous for certain colors of the workpieces.

Fig. 2 further shows the tray 26 in front of the lower beam 12 in working position 67, wherein the shelf 27 extends approximately horizontally. By the rotation axis 28, the tray 26 can be spent in the rest position 68 shown by dashed lines.

Below the lower press beam 12, the recess 5 which forms the footwell 6 for an operator sitting in front of the press brake 1 is arranged, which is delimited by the footwell protection plate 25 behind the lower press beam. In the recess 5 and in the footwell 6 is in the embodiment according to Fig. 2 a footrest 69 is arranged on which an operator sitting in front of the bending press 1 can support his feet or his legs. The footrest 69 can be adjustable in height and adjustable in its inclination to adapt to physical conditions by an adjusting device 70. The adjusting device can be formed as shown by a plurality of mutually spaced attachment points for the footrest 69, but also by guide arrangements such as guide rails. For operating the bending press 1 while sitting, a foot switch 71 which can be actuated with a foot is arranged in the recess 5 or in the footwell 6, in particular on the footrest 69.

The functions of the bending press 1, in particular the control of the adjusting drive 11, drive device 48, front lighting 38, rear lighting 54, backgauge device 58; Adjusting device 61, luminous marking devices 63, 64, by a programmable electronic control device 37, which is arranged in the illustrated embodiment in the machine housing 33 in the region of the upper press beam 10. In this case, the control device 37 comprises the arithmetic units, memory units, input and output interfaces required for machine controls, which are well known from the prior art. In addition to the foot switch 71 is to operate the control device 37 by the operator based on Fig. 1 described control panel 34 is arranged approximately at eye level of the operator. This can be adjusted to adapt to different body sizes of the operator in its inclination, as indicated by dashed lines, about a horizontal pivot axis 72nd

Fig. 3 shows the lower part of an operating page of a bending press 1 according to the invention or a press brake 2, in which the lower press bar 12 is designed as a press table 73 which extends as in known types of press brake into the area of the footprint 18, but a recess 5, the forms a footwell 6, has. The press table 73 can be connected over its entire height by welds with the two cheeks 16, 17 of the machine frame 13.

Fig. 4 shows the lower part of the operating side of another embodiment of the bending press 1 and a press brake 2, in which two mutually spaced recess 5 are formed in a press table 73 which form a footwell 6 for an operator sitting in front of the bending press 1 side by side. The two recesses 5 are separated from each other by a support member 74 which is supported on the footprint 18 or a lower part of the machine frame 13. By arranged in the region of the highest bending moment load support member 74 caused by the recesses 5 weakening of the rigidity of the press table 73 and the lower press bar 12 is very low.

The embodiments show possible embodiments of the bending press, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual Embodiment variants are mutually possible and this possibility of variation due to the doctrine of technical action by objective invention in the skill of those working in this technical field expert. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of order, it should finally be pointed out that in order to better understand the structure of the bending press, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size.

The problem underlying the independent inventive solutions can be taken from the description.

Above all, the individual in the Fig. 1 . 2 ; 3; 4 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

REFERENCE NUMBERS

1

bending press

41

Light opening

2

press brake

42

Light output slot

3

operating side

43

shield

4

front

44

back

5

recess

45

lower crosspiece

6

footwell

46

upper cross section

7

bending tool

47

inner cross member

8th

punch

48

buoyancy device

9

bending die

49

hydraulic cylinders

10

upper press beam

50

guide assembly

11

adjustment

51

guide rails

12

lower press beams

52

guide carriage

13

machine frame

53

bending plane

14

end

54

Rear lighting

15

end

55

working space

16

cheek

56

easy mark

17

cheek

57

Lamp

18th

footprint

58

Back gauge device

19

width

59

stop element

20

depth

60

stop finger

21

height

61

adjustment

22

boundary surface

62

stepper motor

23

bottom

63

Fluorescent marker

24

rounded area

64

Fluorescent marker

25

Footwell fender

65

Bending line marker

26

filing

66

line laser

27

shelf

67

working position

28

axis of rotation

68

rest position

29

depth

69

footrest

30

recliner

70

adjustment

31

fixing

71

footswitch

32

elbow pad

72

swivel axis

33

machine housing

73

press table

34

control panel

74

support element

35

display screen

75

width

36

operating element

37

control device

38

Front lighting

39

working space

40

Lamp

Claims (32)

Bending press (1), in particular a press brake (2), with a fixed lower pressing bar (12) or press table (73) and an upper pressing bar (10) adjustable by means of an adjusting drive (11) relative to the lower pressing bar (12) or press table (73) ), characterized in that the lower pressing beam (12) or the pressing table (73) or a machine table or frame (13) supporting the lower pressing beam (12) has at least one recess (5) on an operating side (3) of the bending press (1). comprising a footwell (6) for an operator. Bending press according to claim 1, characterized in that the recess (5) has a horizontal clear width (19) of at least 500 mm, in particular of at least 750 mm. Bending press according to claim 1, characterized in that two mutually spaced recesses (5) each having a horizontal clear width (19) of at least 200 mm are arranged, wherein between the two recesses (5) a support element (74) having a width (75 ) is arranged between 50 mm and 250 mm. Bending press according to one of claims 1 to 3, characterized in that the recess (5) has a horizontal depth (20) of at least 250 mm, in particular 450 mm, preferably 600 mm measured from the front side (4) of the bending press (1). Bending press according to one of claims 1 to 4, characterized in that the recess (5) protrudes at least 200 mm behind a bending plane (53) formed by the pressing bars (10, 12). Bending press according to one of claims 1 to 5, characterized in that the recess (5) in the middle has a vertical clear height (21) of at least 650 mm, preferably 750 mm. Bending press according to one of claims 1 to 6, characterized in that an upper boundary surface (22) of the recess (5) has a vault-like rounding area (24). Bending press according to one of claims 1 to 7, characterized in that an upper boundary surface (22) of the recess (5) from the underside (23) of the lower press beam (12) is formed. Bending press according to one of claims 1 to 8, characterized in that the lower pressing beam (12) with its end portions (14, 15) on lateral cheeks (16, 17) of the machine frame (13) is fixed. Bending press according to one of claims 1 to 9, characterized in that in the recess (5) opposite to a mounting surface (18) of the bending press (1) increased footrest (69) is arranged. Bending press according to claim 10, characterized in that the footrest (69) is adjustable in height. Bending press according to claim 10 or 11, characterized in that the footrest (69) is adjustable in its inclination. Bending press according to one of claims 1 to 12, characterized in that in the recess (5) an operable with a foot, with a control device (37) of the bending press (1) connected foot switch (71) is arranged. Bending press according to one of claims 1 to 13, characterized in that in front of the bending plane (53) comprises a lighting means (40), in the working space (39) between the upper pressing beam (10) and the lower pressing beam (12) luminous front lighting ( 38) is arranged. Bending press according to one of claims 1 to 14, characterized in that behind the bending plane (53) comprises a lighting means (57), in the working space (55) behind the lower pressing bar (12), in particular on a backgauge device (58) illuminating rear room lighting (54) is arranged. Bending press according to claim 14 or 15, characterized in that the front lighting (38) or the rear room illumination (54) is formed by a light bar which is at least approximately parallel to the pressing bars (10, 12). Bending press according to one of claims 14 to 16, characterized in that the lighting means (40, 57) of the front lighting (38) and / or the rear lighting (54) inside a fixed machine housing (33) is arranged integrated and this at least one light exit opening ( 41), in particular a light exit slot (42). Bending press according to one of claims 15 to 17, characterized in that the rear room lighting (54) comprises a luminous marking device (63) by means of an adjusting device (61) from the illuminant (57) caused luminous marking (56) on a stop element (59) a group of several stop elements (59) can attach. Bending press according to claim 18, characterized in that the adjusting device (61) of the luminous marking device (63) with the backgauge device (58) controlling the control device (37) is communicatively connected and the luminous marking (56) by the adjusting device (61) respectively on the Control device (37) for use certain stop element (59) is positionable. Bending press according to claim 19, characterized in that the adjusting device (61) comprises a stepping motor (62). Bending press according to one of claims 14 to 20, characterized in that the lighting means (40, 57) of the front room lighting (38) or the rear room lighting (54) is selected from a group comprising incandescent lamps, halogen lamps, fluorescent tubes, xenon lamps, light-emitting diodes, laser lamps. Bending press according to one of claims 14 to 21, characterized in that the light intensity of the front room lighting (38) or the rear room lighting (54) by means of a light-emitting device control device is variable. Bending press according to one of Claims 1 to 22, characterized in that the bending press comprises a luminous marking device (64), with which a bending line marking (65) lying in the bending plane (53) formed by the pressing bars (10, 12), in particular on the upper side a can be positioned between a bending die (9) fastened to the lower pressing beam (12) and a workpiece which can be positioned at the upper pressing beam (10). Bending press (1) according to one of claims 1 to 23, characterized in that on the operating side (3) in front of the lower pressing beam (12) a tray (26) with a depositing surface (27) is arranged. Bending press (1) according to claim 24, characterized in that the tray (26) by means of an adjusting arrangement (30) and a fixing device (31) in different positions with respect to the lower pressing bar (12) is positionable. Bending press (1) according to claim 24 or 25, characterized in that the tray (26) between a working position (67) and a rest position (68) adjustable, in particular about a substantially horizontal axis of rotation (28) pivotable on the lower pressing beam (12) or Pressing table (73) is attached. Bending press (1) according to any one of claims 24 to 26, characterized in that the deposit surface (27) in an approximately horizontal working position transversely to the lower press beam (12) oriented depth (29) of at least 150 mm. Bending press (1) according to one of claims 1 to 27, characterized in that in front of the lower pressing beam (12), in particular on the tray (26), an elbow pad (32) is arranged. Bending press (1) according to any one of claims 24 to 28, characterized in that the support surface (27) in working position (67) between 0 mm and 150 mm below the upper edge of the lower press beam (12) is arranged. Bending press (1) according to one of claims 1 to 29, characterized in that a with a control device (37) of the bending press (1) cooperating control panel (34) on the operating side (3) on a fixed machine housing (33) in front of and above the upper press beam (10) is arranged. Bending press (1) according to claim 30, characterized in that the control panel (34) by an adjusting device in different positions with respect to the machine housing (33) is positionable. Bending press (1) according to claim 31, characterized in that the control panel (34) is adjustable by the adjusting device about a substantially horizontal pivot axis.

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