• 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:
    Protective device for protecting an operator against blunt objects ejected from a machining unit (11) and a machining tool (1) for machining workpieces (4) made of wood or similar materials, having a first movable screen (15 ), a second movable screen (16) and plates (39, 40, 39 ', 40') which are slidable and cooperate with the screens (15, 16) to define a working area (17) in which a processing unit (11) of the machining tool is arranged to separate the machining unit (11) from an operator located in the vicinity of the machining unit, in which the displaceable plates (39, 40, 39 ', 40') in a cantilevered manner are supported by the screens (15, 16).
    公开号:AT516138A2
    申请号:T50706/2015
    申请日:2015-08-06
    公开日:2016-02-15
    发明作者:
    申请人:Scm Group Spa；
    IPC主号:
    专利说明:

    The invention relates to a protective device against blunt objects, in particular tool fragments or processing chips, which are ejected at high speed through a processing unit connected to a processing tool arranged for processing wood or similar materials. National or supranational standards have been issued over the years that determine occupational health and safety to prevent injuries to processing tool operators.
    In order to conform to such standards, various protective devices and apparatus have been developed that are connectable to a processing tool to protect an operator from blunt objects ejected by the processing tool processing unit during processing.
    In particular, the need to provide protective devices connectable to a processing tool is strongly felt in the field of processing tools adapted to perform so-called pendulum processing.
    Shuttle processing can be performed whenever the processing tool has a processing level that extends enough to be able to be split into at least a pair of processing stations.
    In this way, while a first workpiece is being processed in a first processing station, it becomes possible for an operator to access a second processing station near the first processing station and deposit a second workpiece.
    Subsequently, once processing of the first workpiece has been completed, the operator can access the first processing station, remove the first processed workpiece, and deposit a third workpiece, all while the processing unit processes the second workpiece in the second station. This obviously allows to increase processing tool productivity due to the fact that setup of the processing station and unloading of the processed workpiece are performed while the machine continues to process another workpiece in an adjacent processing station.
    Since the processing unit has high cutting speeds during processing, tool fragments or processing chips can be ejected therefrom and hit the operator who is in the vicinity of the processing tool, which may even seriously injure the operator.
    German patent DE 10 2006 020679 of the same Applicant discloses a protective device connectable to a processing tool comprising a first portal and a second portal, which is referred to as an inverted " U " are shaped, and are movable with respect to the processing unit of the processing tool. Each gantry includes a screen facing the base of the processing tool and located to isolate the processing stations to the side. The two gantries are connected by a series of folding plates that lock the processing station forward. The gantries and a crosspiece supporting the processing unit are movable on certain guides along a longitudinal direction of the processing tool. Similarly, the movement of the folding plates is guided by a bottom guide which extends parallel to the aforementioned longitudinal direction. Before processing begins, the operator appropriately positions the two gantries with respect to the crosspiece at the base of the dimensions of the workpiece. A drive is provided for moving the portals to the desired position.
    Also, European Patent EP 1 985 412 of the same Applicant discloses protective devices connectable to a processing tool. In one embodiment, the patent discloses a support structure equipped with a plurality of guides along which a plurality of plates are slidable. The two panels at opposite ends of the plurality of panels (i.e., the first and the last) are connected by respective connecting members, each having a first portal and a second portal. The first portal and the second portal are shaped as an inverted "U" and are longitudinally slidable along guides provided at the base of the processing tool. The first portal and the second portal are equipped with respective motor units that allow the first portal and the second portal to be moved. Accordingly, the first gantry and the second gantry act as supports for moving the plurality of panels between a compact configuration in which the panels are substantially stacked and an exploded configuration in which the panels are substantially alongside each other.
    The guards and devices disclosed by the aforementioned patents provide good protection for operators near the processing tool.
    However, these protective devices and devices have the disadvantage of requiring the movement of the gantries (and thus the plates) whenever the processing tool stops processing a workpiece in a processing station. In shuttle processing, where the processing tool processes one workpiece in a reciprocal manner between two adjacent stations, the guards must be positioned each time so as to isolate the processing station in which the machine operates. Thus, each time the processing tool is processing a Workpiece in a processing station, it is necessary to move the gantries (and the plates) to a position which is such as to limit the other processing station in which the following workpiece will be processed.
    Moving the gantries and panels from one processing station to another requires a certain amount of time during which the processing tool can not operate. Accordingly, this movement time required for the guards reduces the productivity of the processing tool.
    Protective devices are further known which are connectable to processing tools and comprise a barrier made with one or more layers of flexible strips of polyvinyl chloride (PVC) juxtaposed. These protection devices include a first gantry and a second gantry located at opposite sides with respect to the carriage supporting the processing unit. Both gantries comprise a crosspiece which is above the working plane and extends over at least a transverse length of the working plane.
    The barrier is then secured to the crosspiece of the portals and from the crosspiece the barrier is conveyed along the longitudinal axis of the machine during movement of the portals from one processing station to the other.
    In particular, the barrier extends around the crosspiece so as to create a protective cage configuration arranged to isolate the processing unit from the external environment.
    The flexible strips extending vertically are fixed at one end by clamps connected to the crosspiece and provided with a free end which is at the level of the processing plane.
    Due to the barrier formed by the flexible strips, in these protective devices the two gantries can move together with the carriage on the workpiece, which in any case allows to keep the area of the processing plane in which the processing unit operates isolated.
    With regard to the devices and the protections previously disclosed, this protector allows an increase in machine productivity due to the fact that the portals can move even when the machine is working, thus reducing the time it takes to position the portals at rest Machine is needed.
    Nevertheless, these safety devices have the disadvantage of being hardly flexible, which can only be used when processing workpieces having limited dimensions and occupying a limited space. In fact, if workpieces have dimensions that exceed certain limits, it is clear that the barriers that are attached to the gantries are not able to completely enclose the workpiece during processing, to the detriment of the safety of operators. Thus, with barriers formed of flexible strips, these devices significantly limit the processing tool that can only be used to safely process small-sized workpieces.
    An object of the invention is to improve protective devices against blunt objects ejected at high speed, in particular to protect an operator who is near the processing tool during the steps of loading / unloading workpieces of the dispensing process disclosed above.
    Another object is to provide a protection device which, when used in the expected position, can be held in a practical and simple manner without its movement adversely affecting the productivity of the machining tool to which the device is connected.
    Another object is to provide a very flexible and reliable protection device that allows the operator to be adequately protected, whatever the type of machining and / or the workpiece being machined. In particular, the protective device according to the invention allows the processing station to be effectively isolated from the operator, regardless of the dimensions of the workpiece being processed and the space occupied by it, i.e., the size of the workpiece. even if the machining tool processes workpieces that have significant dimensions.
    Another object is to provide a protection device that is lightweight and easy to move.
    Yet another object is to provide a compact protection device which allows to reduce the volumes of processing stations that must be kept isolated by the operators, allowing for more compact machining tools that occupy less space.
    According to the invention, a protection device according to claim 1 is provided.
    The invention may be better understood and implemented with reference to the accompanying drawings, which illustrate an embodiment thereof by way of non-limiting example, in which:
    Fig. 1 is a perspective view of a processing tool adapted for processing wood or similar materials to which is connected a protection device according to the invention shown in a first operating configuration;
    Fig. 2 is a perspective view like that of Fig. 1, showing the protection device in a second operating configuration;
    Fig. 3 is a partial front view of Fig. 1;
    Fig. 4 is a partial front view of Fig. 2;
    Fig. 5 is a perspective view of a portion of a protector associated with a machining tool for processing wood or similar materials, such as the machining tool shown in Figs. 1 and 2;
    Fig. 6 is a perspective view of another part of the aforesaid protection device;
    Fig. 7 is a perspective view of a machining cell into which the machining tool of Fig. 1 is inserted;
    Fig. 8 is a perspective view like that of Fig. 7, in which the machining tool of Fig. 2 is inserted;
    Fig. 9 is a top plan view of Fig. 7;
    FIG. 10 is a top plan view of FIG. 8. FIG.
    Referring to Figs. 1 and 2, there is shown a processing tool 1 which is controlled by a numerically controlled device and adapted for performing a plurality of mechanical machining operations on wood or similar materials.
    The machining tool 1 comprises a base 2 which extends along a substantially horizontal axis X, on which a substantially horizontal working plane 3 is arranged, which is designed for stationary picking up of a workpiece 4.
    The base 2 comprises two side surfaces 5 which extend along the axis X on opposite sides of the working plane 3.
    Each side surface 5 is provided with a first guide 6 extending along a direction substantially parallel to the axis X.
    The machining tool 1 further comprises a carriage 10 which is substantially in the shape of an inverted " L " which is provided with a substantially parallelepiped-shaped support 7 extending along an axis Z which is substantially vertical and substantially perpendicular to the axis X.
    The support 7 is further provided with a first blocking means, not shown, which is designed to engage with the first guides 6.
    This allows the support 7 to move along a direction substantially parallel to the axis X. The movement of the carriage 10, and thus the support 7, is obtained by a motor unit (not shown and of the known type) connected to the carriage 10.
    Furthermore, the carriage 10 comprises a crosspiece 8, in the form of a parallelepiped, supported by the support 7.
    In particular, the crosspiece 8 is substantially perpendicular to the support 7 and extends along an axis Y which is substantially perpendicular to the axis X and the axis Z.
    The crosspiece 8 is then provided with a pair of second guides 9 which extend substantially parallel to the axis Y.
    The crosspiece 8 carries a processing unit 11, which is equipped with a carriage 13, which fits to a second blocking means, not shown, which is designed to engage with the pair of further guides 9. The known type machining unit 11 may support one or more tools configured to perform the desired machining on the workpiece.
    In an alternative embodiment, not shown, the crosspiece 8 may also support more than one processing unit 11.
    The carriage 13 further comprises a third pair of guides, not shown, extending along the axis Z arranged for engagement with a corresponding third block means, not shown, with which the processing unit 11 is provided.
    In this way, the processing unit 11 can be moved along the axis X by the carriage 10, along the axis Y by the carriage 13 and along the axis Z by sliding on the third pair of guides of the carriage.
    The axes X, Y or Z form a group of three axes orthogonal to each other along which the processing unit 11 performs corresponding controlled movements as far as they are controlled by a numerically controlled unit.
    This allows the processing unit 11 to perform multiple movements so as to be able to perform a plurality of desired processes.
    The processing tool 1 further comprises a protection device 14 adapted to protect an operator against blunt objects, for example, tool fragments or machining chips ejected in operation by the processing unit 11.
    As can be seen in FIGS. 5 and 6, the protection device 14 includes a movable shield 15, 16, and plate means 39, 40, 39 ', 40' which are slidable and cooperate with the shield 15, 16 to define a working area 17 in which the
    Processing unit 11 is positioned so that it is isolated from an operator who is close to it. In particular, the shield 15,16 is movable along the longitudinal axis X.
    The plate means 39, 40, 39 ', 40' are supported by the shield 15, 16 in a swinging manner. The plate means 39, 40, 39 ', 40' are thus connected to the shield 15, 16, so that they engage with the shield 15, 16 move together along the axis X.
    It should be noted that the plate means 39, 40, 39 ', 40' are oriented relative to the shield 15, 16 so as to be cantilevered in a direction substantially parallel to the axis X, i. in the same direction of movement of the shield 15, 16 and the plates 39, 40, 39 ', 40'.
    Due to this arrangement of the plate means 39, 40, 39 ', 40' with respect to the shield 15, 16, the protector 14 is able to effectively limit the working area 17, having a structure that is simple and light, and thus can be easily moved, even at a higher speed than in protection devices known in the art.
    Since the plate means 39, 40, 39 ', 40' are held in a swinging manner, this means that they are either suspended below or slidably suspended from a suspended frame above. As better seen in Figures 3 and 4, the lower ends 41 of the plate means 39, 40, 39 ', 40' are spaced from a bottom 47 on which the processing tool 1 rests at a certain distance D. For example, the distance D between the bottom and the lower ends 41 may be approximately equal to 20 cm. The distance D is chosen so that the lower ends 41 are at a vertical height which is much lower than the working plane 3, so as to ensure a suitable level of protection even against obtuse objects ejected downwardly by the processing unit 11.
    The slidable plate means 39, 40, 39 ', 40' are movable along a direction parallel to the axis X and allow the processing unit 11 to always be kept isolated from the external environment and operators located in the vicinity of the processing unit 11 are located.
    The shield 15, 16 comprises a first screen 15 and a second screen 16, each of which supports in a swinging manner at least one first plate 39, 40 contained in the plate means 39, 40, 39 ', 40'.
    The plate means 39, 40, 39 ', 40' further comprise a second plate 39 ', 40' which is fixed to the first plate 39, 40 and slidable with respect to the latter. In particular, the first screen 15 is pivotally supporting the first plate 39 and the second plate 39 '(slidable on the first plate 39) while the second screen 16 supports the first plate 40 and the second plate 40' in a free-swinging manner (Figs displaceable on the first plate 40).
    The guard 14 includes linear guide means 42 secured to the first plates 39, 40 and to the second plates 39 ', 40' to prevent the (respective) movement of the second plate 39 ', 40' with respect to the first plate 39, 40 during a Move to lead.
    The second plate 39 'is movable relative to the first plate 39 - to which it is attached - between a retracted configuration A, in which the first plate 39 and the second plate 39' are substantially superimposed, and an extended configuration B, in which the second Plate 39 'is cantilevered by the first plate 39 and protrudes toward the first plate 40 and the second plate 40', which are supported in a cantilever manner by the second screen 16.
    In the same way, the second plate 40 'is movable with respect to the first plate 40 to which it is attached, between a retracted configuration A in which the first plate 40 and the second plate 40' are substantially stacked, and an extended configuration B, in which the second plate 40 'is cantilevered from which the first plate 40 is supported and projects toward the first plate 39 and the second plate 39', which are supported in a cantilever manner by the first screen 15.
    The retracted configuration A of the panels is visible in Figures 1, 3, 7 and 9, whereas the extended configuration of the panels is visible in Figures 2,4-6, 8 and 10.
    The guard 14 further includes a closure means 43 secured to each second panel 39 ', 40' and arranged to ensure the closing of the panels 39, 40, 39 ', 40' both in the retracted configuration and in the extended configuration. The known type closure means 43 comprises two elements each secured to one of the second plates 39 ', 40' and arranged to engage each other to ensure the closing of the plates. The closing means 43 of the known type may comprise, for example, a magnetic means, a mechanical fastening / solvent, etc.
    In the embodiment shown, the closure means 43 comprises two pairs of elements, one pair of which is disposed near the linear guide means 42 and another pair is disposed near the lower ends 41.
    The screens 15 and 16, which are parallel to each other and substantially transverse to the axis X, are adapted to be above the base 2.
    The screens 15, 16 have the same structure and are mirror images of each other, as shown in FIG. 5 and 6 can be seen.
    The screens 15, 16, made of sheet metal or equivalent materials, for example, are substantially in the shape of an inverted " U ".
    Each screen 15, 16 includes a first post 18, a second post 20, and a central portion 19 connecting the post 18, 20. The central region 19 above the base 2 extends parallel to the transverse axis Y (i.e., transverse, in particular perpendicular to the longitudinal axis X).
    The first post 18 and the second post 20 extending along the Z axis are both provided with a pair of blocks 24. In particular, the pair of blocks 24 are secured to corresponding ends 21 of the supports 18, 20 which face the side surface 5 of the base 2. In this way, the pair of blocks 24 of each support 18, 20 is engaged with the first guide 6 of the side surface 5 which faces the blocks 24. The second
    Support 20 is further provided with a plate-shaped portion which is completely similar to and connected to the plate means 39, 39 ', 40, 40'.
    The coupling between the blocks 24 and the guides 6 allows the screens 15 and 16 to slide along a direction substantially parallel to the axis X.
    It is understood that movement of the screens 15, 16 can also be obtained by a coupling that differs from the disclosed and illustrated block-guide coupling, but is technically equivalent thereto.
    Each screen 15, 16 may include a drive means, not shown, which controls its movement. The drive means, for example of the known type, may in particular comprise an electric motor.
    Each screen 15, 16 further comprises a barrier means 27 which is fixed to a central area 19 and projects from the latter to the working plane 3.
    The barrier means 27 comprises a plurality of flexible strips 27a made, for example, of polyvinyl chloride (PVC) and arranged side by side.
    The barrier means 27 further comprises an elongated member 25 which is substantially in the shape of a parallelepiped and extends parallel to the axis Y substantially over the entire length of the central region 19.
    The flexible strips 27a, which extend along the axis Z, are held at one end by the elongated element 25, and are provided with a free end which is at the level of the working plane 3.
    The barrier means 27 is movable with respect to the central region 19 along a direction substantially parallel to the vertical axis Z. In order to allow the barrier means 27 to be moved vertically, the central area 19 is provided with a moving means 28. The moving means 28 for lifting and / or
    Lowering the barrier means 27 may, for example, comprise linear pneumatic actuators.
    In the embodiment shown in the figures, the moving means comprises two linear pneumatic actuators 28 arranged at opposite ends of the central area 19. In other words, one pneumatic actuator 28 is disposed near the first support 18, and the other pneumatic actuator 28 is disposed near the second support 20.
    From the pneumatic actuators, respective rods project toward the barrier means, the rods being connected to the elongate member 25 for raising and / or lowering the latter (and hence the flexible strips).
    The elongate member 25 contacts an inner wall 19A of the central portion 19 facing the work area 17 and moves vertically with respect to the central portion 19.
    In an alternative embodiment, not shown, the crosspiece means comprises hollow means for receiving the barrier means, in particular the elongate member and at least a part of the flexible strips. In this embodiment, the elongate member is movable in a vertical direction parallel to the axis Z within the cavity means.
    At opposite ends of the central region 19, the pillars 18, 20 extend. The pillars 18, 20 are thus disposed on opposite sides of the base 2.
    The plate-shaped part of the second support 20 is provided with an opening 30 in which a transparent screen means 31 is arranged, which is arranged substantially for illuminating the screens 15 and 16. Similarly, also in each first plate 39, 40 and in each second plate 39 ', 40' an opening 30 is obtained, in which the transparent shielding means 31 is arranged. In addition to illuminating the plates 39, 40, 39 ', 40', the transparent screen means 31 allow the
    To monitor the operator during processing a processing unit 11, they make the work area 17 visible from the outside.
    It should be noted that the structure of the plate means 39, 40, 39 ', 40' is similar to that of the second support 20. In particular, the second support 20 and the plate means 39,40, 39 ', 40' is not supported from below. In other words, the lower end of the plate portion of the second support 20 is vertically aligned with the ends 41 of the plate means 39, 40, 39 ', 40', i. at the same distance D from the ground 47.
    Referring to Figs. 7 to 10, the processing tool 1 inserted in a processing cell 33 is shown.
    The processing cell 33 includes a plurality of plates 34 arranged to form a fence 35 of substantially rectangular shape in which the processing tool 1 is to be positioned.
    The fence 35 is provided with a first service door 36 received in a first sidewall 37 from which the operator can gain access, for example, to perform maintenance. The fence 35 is further formed by a second side wall 38, which is parallel to the first side wall 37 and opposite to the latter with respect to the machining tool 1.
    Finally, the fence 35 is also defined by a rear wall 32 connected to the side walls 37, 38 and substantially perpendicular to the latter.
    In practice, the fence 35 encloses the processing tool 1 on three sides, thus allowing the processing tool 1 to be separated from the environment to the rear and to the side. On the front side, on the other hand, the processing tool 1 is isolated from the environment and from the operator by the plate means 39, 40, 39 ', 40' which, once closed, form a front wall 44.
    The machining tool 1 ultimately comprises an electronic control means 50 programmable with computer commands to control the movement of the first screen 15 and the second screen 16 along the longitudinal axis X with respect to the movement of the carriage 10 along the same axis.
    The operation of the protection device 14 is particularly suitable for allowing a so-called shuttle processing.
    Pendulum machining can be performed whenever the machining tool has a working plane 3 that is extended sufficiently to be split into at least one pair of machining stations.
    In this way, while at a first processing station 48 a first workpiece is being processed, it is possible for the operator to access a second processing station 49 near the first processing station and to attach a second workpiece.
    Subsequently, once machining of the first workpiece has been completed, the operator can access the first processing station 48, remove the first processed workpiece, and attach a third workpiece, while in the second processing station 49, the processing unit 11 processes the second workpiece. During operation of the machining tool 1, the plate means 39, 40, 39 ', 40' are closed by the closing means 43 so as to define the front wall 44.
    In operation, the guard 14 moves together and integrally with the carriage 10. In this way, the protection device 14 encloses a work area 17 in which the processing unit 11 is movable, which is movable with respect to the base 2 and the working plane 3.
    When the machining tool 1 is machining a workpiece in the first machining station 48, the protective device 14 is positioned so that the working area 17 is defined at the first machining station 48. On the other hand, when the machining tool 1 processes a workpiece in the second machining station 49, the
    Guard 14 is moved to the second processing station 49 so as to define the working area 17 at the latter.
    For this purpose, the electronic control device 50 is programmed so that the drive means controlling the movement of the first screen 15 and the second screen 16 is coordinated with the motor unit connected to the carriage 10. Thus, the first screen 15, the second screen 16 and the carriage 10 are all moved along the axis X with the same law of motion and the same speed. In other words, the screens 15 and 16 are uniform throughout their movement with the carriage 10.
    This allows a protector 14 to be obtained which can be moved continuously at the machining plane 3 both when the machining tool 1 is operating and when the machining tool 1 is not machining the workpiece 4, for example because the machining unit 11 is between the first machining station 48 and the second machining station 49 emotional.
    Further, in operation, before the machining tool 1 begins machining the workpiece 4, the operator may position the plate means 39, 39 ', 40, 40' in the retracted configuration A or in the extended configuration B, depending on the dimensions of the workpiece 4. The protector 14 must necessarily completely enclose the workpiece 4 within the working area 17. Thus, depending on the dimensions of the workpiece, the operator positions the plates in the retracted configuration A or in the extended configuration B. It is obvious that in the retracted configuration A the working area 17 is very compact and has smaller volumes, whereas in the extended configuration B the working area 17 is more extensive and has larger volumes. If the processing tool 1 is to process another production lot consisting of a workpiece having dimensions very different from those of the workpieces previously processed (of larger or smaller dimensions), the operator can easily place the second plates 39, 40 'on the linear one Guide means 42 for positioning the plate means 39, 39 ', 40, 40' from the retracted configuration A to the expanded configuration B (or vice versa) extremely easily and quickly.
    Typically, the operator will position the plate means 39, 39 ', 40, 40' in the retracted configuration A if the processing tool is to machine a workpiece 4 of reduced dimensions, whereas if the processing tool 1 is to process workpieces of significant dimensions, the operator will drive the plate means 39, 39 ', 40,40' will be in the extended configuration. In general, in the retracted configuration A, the screens 15 and 16 are movable together with the carriage 10 as previously indicated. On the other hand, when the disk means 39, 39 ', 40, 40' occupy the deployed configuration B, the operator may also program the electronic controller 50 such that the screens 15 and 16 are fixed with respect to the carriage 10 so as to define a fixed work area 17, in which the workpiece 4 is completely enclosed. During movement of the first screen 15 and the second screen 16, the barrier means 27 is generally lowered. In fact, even during flexing or striking of the workpiece 4, the flexible strips 27a do not damage the workpiece being machined, due to the flexible material from which they are made, during movement of the screens.
    Before the machining tool 1 starts machining a workpiece or production made up of multiple workpieces, the operator confirms the linear pneumatic actuators 28 to position the barrier means 27 vertically in the desired position, based on the height of the workpieces.
    By virtue of the invention, a protective device 14 has been provided which is connectable to a machining tool 1 capable of protecting an operator from blunt objects such as e.g. Tool fragments or processing chips ejected from the processing unit 11 at high speed.
    An advantage of the protection device 14 is that it allows to maintain high machining tool productivity. In fact, the fact that the protector 14 can be continuously moved along the longitudinal axis allows to substantially reduce the machine setup time due to the arrangement of the protector through the machine
    Operator. Furthermore, in the case of pendulum machining, this also allows to substantially reduce the machine downtime required in known machining tools for moving the processing unit 11 and guard 14 from one processing station to another.
    This is achieved due to the fact that the plate means 39, 39 ', 40, 40' are held cantilevered by the shielding means 15, 16 (and thus not supported from below). The absence of guides, for example overhead or bottom guides, arranged to guide the displacement of the plates results in the plates being supported and guided in movement along the axis X solely due to the first screen and the second screen. This allows a guard 14 and a working area 17 to be obtained which are continuously movable on the working plane 3 so as to obtain a very flexible and productive machining tool 1.
    It should be noted that the plate means 39, 39 ', 40, 40' comprise a small number of plates (four in total, i.e. two for each screen), each of which is rather light. This is an important aspect in view of the fact that the plate means 39, 39 ', 40, 40' are held in a cantilevered manner by the screens 15, 16. In contrast, prior art protective devices, such as those disclosed by the aforementioned patents, require a large number of plates to isolate a sufficiently large work area that is necessary because the portals are solid in known protective devices while the prior art patent application is incorporated herein by reference Machining tool works. The movement of these large numbers of plates must necessarily be guided by guides (e.g., floor or overhead guides) to ensure their proper shifting. Furthermore, the large number of plates results in a very heavy structure that can not be supported in a cantilever manner by the portals and has substantial inertia during movement.
    Another advantage of the guard 14 is that it has a structure such that the guard 14 is made extremely flexible in use.
    The protector 14 may actually circumscribe a working area 17 which is dependent on the area of the working plane 3 occupied by the workpieces 4, i. according to the dimensions of the latter, more compact or larger. This optimizes the volumes occupied by the processing stations 48 and 49 and makes the processing tool 1 less bulky and compact.
    Another advantage of the guard 14 is that it is very reliable and allows the operator to be adequately protected for any type of machining and / or workpiece that is being machined. In particular, the protection device according to the invention allows the work area to be effectively separated from the operator, regardless of the dimensions and space occupied by the machined workpiece, i. even if the machining tool processes workpieces of substantial dimensions.
    Yet another advantage of the protective device 14 according to the invention is that it is easily movable and its movement is easily controllable. In fact, owing to the electronic control device 50, it is possible to control the driving means of the screens 15 and 16 and the motor unit connected to the carriage 10 so that the latter and the screens 15, 16 move according to the same law of motion and at the same speed. This allows a first screen 15 and a second screen 16 to move, moving along with the carriage 10 in the movement along the axis X so as to have an isolated work area 17 (in which the processing unit 11 is arranged) located on the working plane 3 is continuously movable, regardless of the machining performed on the workpiece 4 and / or the dimensions of the latter.
    权利要求:
    Claims (15)
    [1]
    A protective device (14) for protecting an operator from a blunt object ejected from a work unit (11) and which is assignable to a machining tool (1) for machining workpieces (4) made of wood or similar materials, with a shielding means (15, 16) which is movable and a plate means (39, 40, 39 ', 40') which is displaceable and which cooperates with the shielding means (15, 16) to define a working area (17) in which a processing unit (11) of the processing tool (1) is positioned to separate the processing unit (11) from an operator located near the processing unit (11), characterized in that the plate means (39, 40, 39 ', 40') ) is supported in cantilever fashion by the shielding means (15, 16).
    [2]
    Apparatus according to claim 1, wherein the plate means (39, 40, 39 ', 40') is oriented with respect to the shielding means (15, 16) so as to be supported in a cantilevered manner in a direction substantially parallel to a longitudinal axis (X) along which the shielding means (15, 16) and the plate means (39, 40, 39 ', 40') move.
    [3]
    A device according to claim 1 or 2, wherein the shielding means (15, 16) comprises a first screen (15) and a second screen (16), each of which supports in a cantilever manner at least a first plate (39, 40) in the plate means (39, 40, 39 ', 40').
    [4]
    Apparatus according to claim 3, wherein the plate means (39, 40, 39 ', 40') comprises a second plate (39 ', 40') mounted on the first plate (39, 40) and displaceable with respect to the latter.
    [5]
    Device according to claim 4, comprising linear guide means (42) mounted on the first plate (39, 40) and on the second plate (39 ', 40') for controlling the movement of the second plate (39 ', 40'). ) with respect to the first plate (39, 40) during a displacement.
    [6]
    6. Device according to claim 4 or 5, wherein the second plate (39 ', 40') with respect to the first plate (39,40) between a retracted configuration (A), in which the first plate (39, 40) and the second plate (39). 39 ', 40') are substantially superimposed and movable in an extended configuration (B) in which the second plate (39 ', 40') is supported in a cantilever manner by the first plate (39, 40) and to the panel means (40 ', 39') projecting in a cantilever manner from the other screen is supported by the first and second screens (15, 16).
    [7]
    A device according to any one of claims 4 to 6, comprising closing means (43) mounted on the second plate (39 ', 40') and arranged to allow closing of the plate means (39, 40, 39 ', 40 ') in both the retracted configuration (A) and in the extended configuration (B).
    [8]
    A device according to any one of the preceding claims, wherein a first screen (15) and a second screen (16) included in the shielding means (15, 16) each comprise a central region (19) which is located above a base (2 ) of the machining tool (1) and extending transversely to a longitudinal direction of the base (2), and further comprising a barrier means (27) attached to the central region (19) and projecting from the latter to the base (2).
    [9]
    A device according to claim 8, wherein the barrier means (27) comprises a plurality of flexible strips (27a) made, for example, of polyvinyl chloride and arranged side by side.
    [10]
    Apparatus according to claim 8 or 9, wherein the barrier means (27) is movable relative to the central region (19) along a substantially vertical direction (Z).
    [11]
    11. Device according to one of claims 8 to 10, wherein the central region (19) comprises a moving means (28) arranged for lifting and / or lowering of the barrier means (27), wherein the moving means, for example, linear pneumatic actuators (28).
    [12]
    A machining tool (1) for machining workpieces (4) made of wood or similar materials, comprising a carriage (10) movable along a longitudinal axis (X) and arranged to support a machining unit (11), which is movable by a guide system (9) along two mutually orthogonal Cartesian axes (Y, Z), a base (2) on which is defined a working plane (3) designed to receive the workpieces (4) in a resting position, and Protective device (14) according to one of the preceding claims.
    [13]
    A machining tool (1) according to claim 12, comprising electronic control means programmable with computer instructions for controlling the movement of the shielding means (15, 16) along the longitudinal axis (X) to follow at least part of the movement of the carriage (10) ,
    [14]
    A machining tool (1) according to claim 12 or 13, wherein the carriage comprises a crosspiece (8) supporting the machining unit (11), the crosspiece being movable on a guide means, the shielding means (15, 16) being attached to the guide means of the crosspiece (8) is movable.
    [15]
    A machining tool (1) according to any one of claims 12 to 14, wherein the shielding means (15, 16) is fixed with respect to the machining unit (11), or wherein the shielding means (15, 16) together with a crosspiece (8) of the carriage (10 ) is movable, which carries the processing unit (11).
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    同族专利:
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    DE102015009879A1|2016-02-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    ITMO20050108A1|2005-05-02|2006-11-03|Scm Group Spa|PROTECTION DEVICES.|
    EP1840448A1|2006-03-30|2007-10-03|Weeke Bohrsysteme GmbH|Adjustable protection cabin|
    ITMO20070141A1|2007-04-24|2008-10-25|Scm Group Spa|PROTECTION EQUIPMENT|
    EP2063165A1|2007-11-23|2009-05-27|Weeke Bohrsysteme GmbH|Device for twin table machining of workpieces|JP2012131001A|2010-12-22|2012-07-12|Mitsubishi Heavy Ind Ltd|Broaching device|
    EP3093112B1|2015-04-09|2019-12-18|BIESSE S.p.A.|Machine to process components of wood or the like|
    DE102016218434A1|2016-09-26|2018-03-29|Homag Gmbh|Processing machine with processing areas and procedures|
    IT201700052888A1|2017-05-16|2018-11-16|Biesse Spa|MACHINE FOR PROCESSING WOOD OR SIMILAR COMPONENTS|
    IT201700052883A1|2017-05-16|2018-11-16|Biesse Spa|MACHINE FOR PROCESSING WOOD OR SIMILAR COMPONENTS|
    DE102017114277A1|2017-06-27|2018-12-27|Liebherr-Verzahntechnik Gmbh|Safety fence for a machine arrangement|
    AT523476B1|2020-01-27|2021-10-15|Trumpf Werkzeugmaschinen Gmbh Co Kg|Machining device for machining one or more workpieces|
    CN113070811A|2021-03-04|2021-07-06|彩虹（合肥）液晶玻璃有限公司|Auxiliary baffle plate for grinding|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ITMO20140236|2014-08-08|
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