DE3817773A1 - Cover arrangement for guide elements of the portal of a processing machine designed as a portal machine - Google Patents

Cover arrangement for guide elements of the portal of a processing machine designed as a portal machine

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Publication number
DE3817773A1
DE3817773A1 DE19883817773 DE3817773A DE3817773A1 DE 3817773 A1 DE3817773 A1 DE 3817773A1 DE 19883817773 DE19883817773 DE 19883817773 DE 3817773 A DE3817773 A DE 3817773A DE 3817773 A1 DE3817773 A1 DE 3817773A1
Authority
DE
Germany
Prior art keywords
portal
rollers
cover
guide
characterized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19883817773
Other languages
German (de)
Inventor
Anton Koukal
Original Assignee
Anton Koukal
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anton Koukal filed Critical Anton Koukal
Priority to DE19883817773 priority Critical patent/DE3817773A1/en
Publication of DE3817773A1 publication Critical patent/DE3817773A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08Protective coverings for parts of machine tools; Splash guards
    • B23Q11/085Flexible coverings, e.g. coiled-up belts

Abstract

In a cover arrangement for the guiding elements - running rollers and guiding rollers - of the portal of a processing machine designed as a portal machine for wooden or plastic pallets, the running rollers are designed as self-aligning ball bearings and roll on running surfaces designed as steel bands. The tracks of the supporting rollers are covered by one flexible cover band each. The cover bands slide by means of guide elements across the supporting rollers at a clearance distance from the latter and are held in contact with the respective running surface by hold-downs arranged on both sides of the supporting rollers. The cover bands are fastened with their ends to longitudinal members of the machine frame. They are designed as glass-fibre fabric strips which are provided with a smooth plastic coating on their top sides remote from the running surfaces. The hold-downs are designed as pressure rollers. Guide plates and/or deflection rollers can be provided as guide elements.

Description

The invention relates to a cover device for guiding elements of the portal of a portal machine Processing machine that ge by means of the portal columns stored support and rollers on the machine frame can be moved back and forth, which as rolling bearings, e.g. are designed as self-aligning ball bearings, with their outer bearing rings on treads that are in horizon taler direction over the length of the machine frame stretch within which the portal back and forth is movable, can be passed on.

Such cover devices are usually with the help of bellows realized on both sides of the Containing rollers and covering them to the extent Storage box of the portal columns are arranged and the Cover the raceway from above in a U-shape, whereby depending on the direction of movement of the portal, a shortening one and an extension of the other bellows results.

Such bellows covers convey one through for effective protection against that from the work process stirring milling or drilling chips, i.e. relatively coarse Debris on the guideway tracks can reach, but only a very insufficient Protection against fine dust since the bellows never can be made completely dustproof and, each in  their "extension phase" like a suction pump act, the dust in the enlarging interior of the Bellows sucks, which then usually with one Oil film-bearing treads of the guide device in turn remains stuck and not "blown out" again when the respective bellows is shortened again. Therefore, a layer of dirt is inevitably formed, which has to be removed at relatively short intervals, if not an increasing frictional resistance of the portal leadership should be accepted. It is therefore ent speaking, often relatively complex cleaning work necessary, which require the disassembly of the bellows, which is awkward. In addition, there are such wrinkles bellows covers require additional installation space, relatively are expensive and also sensitive to wear.

The object of the invention is therefore a cover device of the type mentioned to improve in that with good protection against pollution Device is much cheaper to manufacture and the inevitable maintenance work required less often Lich and are easier to carry out.

This object is achieved by the in the kenn Drawing part of claim 1 mentioned features solved.

According to this, flexible tapes are provided as cover elements, which lie snugly against the raceways and thereby reliably rule out contamination of the same, even if the elements carrying the raceways - for example longitudinal members of the machine frame - are not enclosed on all sides by the cover elements. Since the masking tapes provided according to the invention have no suction effect, there is also no risk that fine-grained dirt can get between the tapes and the raceways. In the area of the support rollers and, if applicable, of guide rollers of the portal guide, these bands are lifted from the running surfaces by guide elements and pushed back into direct contact with the running surfaces by means of hold-downs which are arranged on both sides of the running rollers. The cover sheets are much cheaper to manufacture than bellows and much easier to assemble. The protective effect of the cover device according to the invention is better than that achievable with bellows of a conventional type, and the cover device is also much cheaper to manufacture and considerably easier to maintain.

In a preferred design, the hold-downs are for the masking tapes are formed as pressure rollers, which the masking tapes over the entire width of the raceways keep in full contact with them.

The features of claim 3 are advantageous simple, alternatively or in combination realizable Designs of the guide elements indicated by means of which a trapezoidal or rectangular, if necessary also a smooth curved undulating course of the masking tape over the each because supporting or running roller can be achieved.  

In any case, it is advantageous if the masking tapes under a moderate, longitudinal pull voltage are kept, which makes a full system of the same can be achieved over the entire career area.

Such tension can either, as by the features of claim 5 indicated by Ver sliding of guide elements and fixability of the same can be achieved in a clamping position, older native or in combination with this by spring or rubber-elastic clamping elements, as by the features of claim 6 specified.

In combination with that by the features of claim 7 specified, preferred design of the masking tapes by the arrangement of according to claim 8 Hold-downs and the guide elements for the cover tapes a particularly well sealing cover of the the space containing the support rollers above of careers achieved.

Alternatively, you can also use the features of claims 9 and / or 10 specified designs of Masking tapes are provided as spring steel tapes to a particularly high stability of the cover lead direction.

Further details and features of the invention emerge special from the following description examples based on the drawing. Show it:  

1 is a guide device, by means of which the portal of a portal machine on longitudinal members of its machine frame can be moved back and forth GE, in a simplified, partially broken-off, schematic plan view,

Fig. 2 is a partial view of the portal engine of FIG. 1, as well as details of their guide means, partly in section along the line II-II of Fig. 1,

Figure 3 is a processing provided in the frame of the guiding device according to FIGS. 1 and 2 Justiereinrich.,

Fig. 4, the alignment device of FIG. 3 in section along the line IV-IV,

5 shows a device. To protect against contamination of the guiding device according to FIGS. 1 to 4 provided, according to the invention Abdeckvor,

FIG. 6 shows the covering device according to FIG. 5 in a view corresponding to FIG. 2 and

Fig. 7 shows another, to the design of the cover device according to FIG. 5 alternative design option.

The portal machine shown in FIGS. 1 and 2, to the details of which are to be referred to next, designated overall by 10 , comprises a machine frame designated overall by 11 and a controlled on this in the longitudinal direction represented by arrow 12 , the X direction - Movable, generally designated 13 portal, on which a machining head 14 , in the Y direction represented by the arrow 16 to the X direction 12 is in turn controlled to move back and forth. The machining head 14 can be equipped with several tool heads 17 , 18 and 19 , for example drill heads 17 and 18 for bores of different diameters and with a milling head 19 .

With such a tooling, the gantry machine 10 shown is particularly suitable for processing wooden, pressed chipboard or plastic panels from which, for example, furniture is to be produced.

However, it is understood that portal machines represent the type also equipped with other tools can be, e.g. Cutting torches or cutting lasers, if necessary also with water jet cutting units.

With such a tooling a portal machine 10 of the type shown for the metal processing, in particular the cutting of metal plates, can be used.

For the illustrated embodiment, without restriction of generality, ie only for the purpose of explanation, it is assumed that the portal machine 10 should be designed for machining plate-shaped workpieces 21 made of wood or plastic, which in a manner not shown on the part of the machine stells 11 forming machine table 22 should be fixable.

The path movements of a tool, for example a milling cutter 25, or the search for bore positions can be controlled in a follow-up manner, that is to say, for example, by photoelectric scanning of a drawing template, or also numerically (CNC) controlled, with the relevant control devices described in can be realized in a known manner, only represented by rack and pinion drives 23 and 24 , by means of which the machining head 14 in the Y direction 16 and the portal 13 as a whole can be driven in the X direction 12 .

The portal 13 has a laterally clearly over the longitudinal edges 27 and 28 of the machine table 22 project beyond the yoke 29 , which is designed as an upright, solid plate made of aluminum or steel.

The vertical portal columns 31 and 32 are shown as stable hollow steel profiles with a square or rectangular cross-section, which laterally pass a small distance along the longitudinal edges 27 and 28 of the machine table 22 .

The machine frame 11 comprises two as a stable rectangular hollow sections 33 and 34 formed longitudinal beams, which in the typical design of the machine have a length L of 6 m and are arranged parallel to each other at a lateral clearance B of 2.5 m and via short columns 36 , which are distributed at a distance over the length of the side members, are supported on the floor of the respective workshop.

The two longitudinal members 33 and 34 are detachably connected to one another by an outer cross member 37 and an inner cross member 38 , the outer cross member 37 being located between transverse end portions of the two longitudinal members 33 and 34 and the inner cross member 38 being between the central portions of the two longitudinal beams 33 and 34 extend horizontally. The side members 33 and 34 are arranged so that their wider profile legs 39 and 41 horizontally and their somewhat narrower profile legs 42 and 43 run vertically.

In a typical design of the longitudinal beams 33 and 34 , the width b H measured between the outer profile edges is around 35 cm, while their vertical "width" b V has a value around 30 cm.

The thickness of the profile legs 39 and 41 or 42 and 43 is 10 mm. The respective outer, vertical longitudinal legs 42 of the longitudinal beams 33 and 34 are arranged so that they lie with the outer longitudinal edge surfaces 27 of the machine table 22 in a common vertical plane.

The lower ends of the columns 31 and 32 of the portal 13 , which, apart from the design of the machining head 14 , is formed symmetrically with respect to its vertical longitudinal center plane 44 running in the Y direction 16 , are used as storage boxes 46 and 47 for support or support mounted in a portal manner Rollers 48 and 49 as well as 51 and 52 are formed, by means of which the portal 13 can be moved to and fro in the X direction 12 .

These rollers 48 , 49 , 51 and 52 are formed by the outer rings of self-aligning ball bearings, for example self-aligning ball bearings according to the German industrial standard DIN 630, the inner rings of these self-aligning ball bearings being placed on the free ends of stable bearing bolts 53 are, in mutually aligned bores 54 and 56 parallel legs 57 and 58 of a horizontally extending in the X- direction box profile 59 are rotatably supported and held, which forms the lower part of each of the two portal columns 31 and 32 , respectively.

The box profile 59 is formed in the special embodiment shown as a downwardly open U-steel profile, in which the clear distance between its two vertical profile legs 57 and 58 corresponds approximately and approximately half the length of the bearing bolts 53 .

The arrangement of these bearing bolts 53 is such that their central longitudinal axes 61 extend parallel to one another and extend horizontally in the Y direction 16 , the central axes 61 of the rollers 48 and 51 and 49 and 52 of the two bearing boxes 46 and 52 arranged opposite one another 47 are arranged in pairs in alignment with each other. These central axes 61 of the bearing bolts 53 , through the course of which, at least approximately the respective axes of rotation of the individual rollers 48 and 49 or 51 and 52 are marked, are on both sides of the vertical longitudinal central plane 44 of the portal 13 , in a clear distance from l arranged by this, which is approximately 60 cm in the selected explanatory example in order to ensure good "stability" of the portal 13 .

The running surfaces 62 and 63 , on which the rollers 48 and 49 or 51 and 52 formed by the outer rings of the self-aligning ball bearings roll when the portal 13 is moved in the X direction 12 are hardened by the upper sides, 1 up to 2 mm thick steel strips 64 and 66 are formed, which have very good smooth and flat surfaces. These steel strips 64 and 66 , which extend over the entire length L of the longitudinal beams 33 and 34 of the machine frame 11 and have a width which corresponds to approximately twice the width of the running surface of the rollers 48 and 49 or 51 and 52 , are on the cross section according to flat-rectangular guide profile bars 67 and 68 with the arrangement, for example, as shown in FIGS. 1 and 2, which in turn extend over the entire length L of the longitudinal beams 33 and 34 of the machine frame. These guide profile bars, the width of which in typical design is only a little less than the horizontal width b H of the longitudinal beam hollow profiles 33 and 34, are connected to them via a thin compensation layer 69 , which is made of a curable plastic, for example a castable polyester Resin is formed, which, before the guide profile bars 68 and 69 are placed on the longitudinal beam hollow profiles 33 and 34 and, if necessary, fastened to them by additional fastening means, for example screws, on the upper sides of the horizontal profile legs 39 of these longitudinal beams. Hollow profiles 33 and 34 has been applied.

By arranging the compensating layer 69 between the steel strips 64 and 66 carrying guide bars 67 and 68 and the below them arranged longitudinal beam profiles 33 and 34 , he wants parallel, preferably coplanar, horizontal arrangement of the treads 62 and 63 of the steel belts 64 and 66 , on which the support and rollers 48 and 49 as well as 51 and 52 roll, simplified considerably without this requiring a highly precise, for example milling or grinding surface processing of these running surfaces 62 and 63 .

The guide profile bars 67 and 68 can therefore easily be cut out of conventional, for example manufactured in the rolling process, aluminum panels, which are supplied as raw material for a variety of purposes. The flatness and plane-parallelism of the surfaces of such boards is sufficient to, in conjunction with the compensating layer 69 and the adhesive layer 71, a sufficient plane-parallelism of the running surfaces 62 and 63 for the rollers 48 and 49 or 51 and 52 of the portal 13 to achieve.

On both sides of the pairs of rollers 48 , 49 and 51 , 52 , which are mounted on one bearing box 46 and on the other bearing box 47 , are the longitudinal members 33 and 34 of the latter at a clear distance above the guide surfaces 62 and 63 of the steel belts 64 and 66 respectively Machine frame 11 hori zontal crossing, between these and the outer longitudinal edge areas of the machine table 22 arranged right corner hollow profile pieces 72 and 73 or 74 and 76 fastened, for example welded, the inner free ends of which are arranged upright, the basic shape elongated rectangular Frame plate 77 and 78 are connected to each other, the free, upper and lower longitudinal edges 79 and 81 are horizontal, as can be seen with reference to a frame plate 77 of FIG. 2.

On the mutually facing inner sides of this frame plates 77 and 78 , along the lower longitudinal edge areas in the X direction 12 horizontally extending toothed rods 82 are fastened with downward-facing teeth, with which drive pinions 83 of the rack and pinion drives 24 mesh, which are fixed by means of a single frame arranged feed drive motor 84 can be driven synchronously, depending on the desired feed direction, plus- X direction or minus- X direction, with an alternative direction of rotation.

Through this symmetrical design of the X -feed drive 82 , 83 , 84 of the portal 13 , in combination with the - provided according to the invention - design of the rollers 48 and 49 or 51 and 52 as outer rings of self-aligning ball bearings, already seen for themselves, a straight guide of the portal in the X direction 12 achieved, since the outer rings when the portal is moved in the X direction 13 - frictionally - as it were automatically oriented in the X direction.

Regardless of this "tendency" inherent in the X -feed drive 82 , 83 , 84 of the portal 13 for automatic straight guidance, it is nevertheless necessary to ensure the straight guidance also by means of guiding means which act in a form-fitting manner, since in the course of machining the workpiece 21st lateral forces acting on the portal 13 occur as reaction forces which have to be compensated for. For this purpose, however, it suffices - because of the self-acting straight guide tendency of the portal 13 - if the guide means of this type are provided only on one portal side, for example on one of the two storage boxes 46 or 47 .

For this purpose, the - form-fitting - straight guidance of the portal 13 a total of four guide rollers 86 , 87 , 88 and 89 are provided on its one storage box 46 with the arrangement shown in FIG. 1, for the explanation of which now also refer to the details of FIG. 3 and 4.

These guide rollers 86 and 88 and 87 and 89 are arranged with the vertical course of their axes of rotation 91 in pairs on the rectangular hollow profile pieces 72 and 73 of a bearing box 46 of the portal 13 , such that the two outer guide rollers 86 and 87 on an outer and the two inner guide rollers 88 and 89 can roll on an inner longitudinal guide surface 92 and 93, respectively, which extend over the length L of the guide profile rod 67 of one side member 33 of the machine frame 11 .

These longitudinal guide surfaces 92 and 93 are in turn formed by the outer surfaces of thin steel strips 94 and 96 , which are glued to the narrow, vertical longitudinal boundary surfaces 97 and 98 of the guide profile rod 67 and extend over its entire length.

In the case of the guide rollers 86 to 89 as well , the roller bodies that roll on the longitudinal guide surfaces 92 and 93 are the outer rings of self-aligning ball bearings, each of which is automatically oriented in the - horizontal - guide direction. The inner rings 99 of the guide rollers 86 to 89 forming pendulum ball bearings sit, as can best be seen in FIG. 4, on an eccentric pin 101 , whose vertical, central longitudinal axis 105 marks the axis of rotation of the respective guide roller. This eccentric pin 101 is, as shown in FIG. 4, arranged on the underside of a circular cylindrical eccentric body 102 which is rotatably guided in a bore 103 corresponding to the diameter of the lower, horizontal leg 104 of the rectangular hollow profile 72 of the bearing box 46 and is slightly displaceable in the vertical direction.

The eccentricity e of the eccentric 101 , 102 , that is, since the distance between the central longitudinal axis 105 of the eccentric pin 101 from the central longitudinal axis 106 of the eccentric body 102 , which marks its axis of rotation, is sufficiently large that the guide rollers 86 to 88 by rotating their eccentrics 101 , 102 can always be brought into full contact with the longitudinal guide surfaces 92 and 93 assigned to them.

The eccentric body 102 is provided with a coaxial threaded bolt 107 with its axis of rotation 106 , which is fastened in a threaded piece 108 , which is fastened, for example, to the upper side of the upper cross leg 109 of the rectangular hollow profile 72 of the bearing box 46 and / or in a threaded bore 111 of this upper one Cross leg 109 guided screwed and by means of a lock nut 112 in a defined position - after rotation about the longitudinal axis 106 - can be determined. By a 180 ° rotation of the eccentric body 102 about its axis of rotation 106 , the axis of rotation 105 of the respective guide roller 86 , 87 , 88 and / or 89 can thus be varied as required within a “strip width” of 2 e , ie the respective guide roller into the The rolling position can be adjusted, the eccentric body 102 experiencing an axial displacement which at most corresponds to half a turn height of the bolt thread. In the special embodiment shown, the threaded bolt has a square or hexagonal profile 113 on its free end section projecting beyond the lock nut 112 in order to be able to rotate the eccentric 101 , 102 by means of a conventional wrench.

It is understood that the basic structure outlined above according to the adjustment device for the guide rolls 86 to 89 can also be realized in other, technically equivalent ways.

Furthermore, it goes without saying that instead of self-aligning ball bearings, e.g. according to DIN 630 also double row spherical roller bearings, e.g. according to DIN 635 can be used, compared to pendulum Ball bearings have the advantage of greater load capacity, but only smaller guide-direction tolerances can resemble.

In order to protect the above-described with reference to FIGS. 1 to 4, the steel belts 64 and 66 , the support rollers 48 and 49 and 51 and 52 and the guide rollers 86 to 89 comprehensive guide device (s) against contamination, in particular to avoid ver that wood or metal milling and / or drilling chips can deposit on the running surfaces 62 and 63 of the steel belts 64 and 66 , which would not only impair the accuracy of the straight guidance, but also lead to increased wear Could contribute, for these functional elements of the guide device of the portal 13, a basic structure according to FIG. 5, to the details of which reference is now made, shown with a total of 115 from cover device.

This cover device 115 is in the left part of FIG. 5 for the FIG. 1 left "lower" support roller 48 of the portal and on its storage box 46 also ge stored guide roller 88 of the portal 13 , partly in section along the central, vertical longitudinal plane 116 of the longitudinal member 33 and the tread 62 of its steel belt 64 and in the right part of FIG. 5 for the area of FIG. 1 right, "upper" support roller 52 of the portal 13 of the portal machine 10 Darge, also partially in section along the verti kalen, central longitudinal central plane 117 of the other longitudinal beam 34 of the machine frame 11 of the portal machine 10th

In FIG. 6, reference is also made to the details, the cover 115 is in a partial view, seen in the direction of the arrow I of FIG. 1, FIG.

As far as the same reference numerals are used for the elements of the portal machine 10 shown in FIGS. 5 and 6 as in FIGS. 1 to 4, this is intended to indicate the reference to the description parts belonging to these figures, even if elements of the FIG . 5 and 6 in the following Descripti will not be mentioned specifically.

Two flexible cover strips 118 , 119 are provided as cover elements of the cover device 115 , which extend over the entire length of the longitudinal beams 33 and 34 and are fastened, for example clamped, to their end faces with their respective strip ends. These cover tapes 118 and 119 are held down by depressions 121 and 122 or 123 and 124 , between which, in the case of the "lower" bearing box 46 according to FIG. 1, one of the support rollers 48 and 49 and the adjacent guide rollers 86 and 88 and in the case of the storage box 47 one of the support rollers 51 and 52 are arranged, on both sides of these guide elements in flat contact with the running surfaces 62 and 63 formed by the steel strips 64 and 66 of the straight guides of the portal 13 , but are held between these hold-downs by guide elements from the the short tread portions 62 and 63, which extend between the hold-downs, are lifted and roll over the support and, if necessary, the guide rollers are guided away.

The hold-downs 121 to 124 are formed in the special embodiment shown as rollers, which extend over the vast majority of the width b of the masking tapes 118 and 119 and around horizontal axes 120 , which run at right angles to the longitudinal direction of the tape, freely rotatable on the storage boxes 46 and 47 of the portal 13 are stored.

In this case, the rollers 121 to 124 are on the inside, ie with their bearing pins 126 pointing towards the opposite bearing box 47 or 46 on the inner, upright frame plate 77 or 78 of the respective bearing box 46 or 47 and with their outer bearing pins 127 on it parallel leg 58 of the bearing box 46 and 47 on the outside in the longitudinal direction delimiting box profile 59 freely rotatably mounted.

As guiding elements, which hold down between two of these hold-downs - the hold-downs 121 and 122 or the hold-downs 123 and 124, the cover strips 118 and 119 via the support or rollers 48 and 49 or 51 and 52 and, if necessary, the guide rollers 86 and 88 lift and lead away, are shown in the special embodiment shown on the one storage box 46 baffles 128 before, between the two hold-down rollers 121 and 122 shown in the left part of FIG. 5, lifted from the tread 62 of the steel belt 64 , Trapezoidal course of the masking tape 118 mediate, with a between the outer hold-down 121 and the rectangular hollow profile 72 , on which the one guide roller 88 is adjustably mounted, and via this upwardly sloping section 118 ', one between the support roller 48 and the this neighboring low-holding roller 122 as it were "vertically" descending section 118 '' and a horizontal ver in between running middle section 118 ''', with which it rests on the top of the correspondingly running guide plate 128 , these sections 118 ', 118 '''and 118 ''each with the due to the shape of the guide plate smooth curvature a gentle sliding of the masking tape 118 as a whole enables it to be connected to one another.

The free end edges of the guide plates 128 , as can be seen in FIG. 5, are curved inwards away from the cover band 118 , so that this does not have to slide over cutting-like edges, which could lead to wear.

This type of tape guide over the respective support rollers can of course be provided for all support rollers of the valley 13 .

In the design shown in the right part of FIG. 5, the cover device 115 , which is shown in the selected exemplary embodiment for the explanation, for the bearings 51 and 52 mounted on the bearing box 47 , is one of the guide elements in verti calem Distance from the tread 63 of the steel band 66 rotatably mounted deflection roller 129 is provided, which mediates a 90 ° deflection between a vertically rising section 119 'and a horizontally extending section 119 ''of the cover band 119 , and as a second guide element, the rectangular hollow profile 76 of the storage box 47 is used , which here mediates a 90 ° deflection of the extending between this guide element and the outer hold-down roller 124 extending vertically extending belt section 119 ''.

Both cover tapes 118 and 119 are attached with their free ends to the side members 33 and 34 , for example, clamped to end plates 130 , as in the right part of FIG. 5 and in FIG. 6 schematically by one on the respective side member 34 or 36 attached terminal block indicated.

In a special design, the masking tapes 118 and 119 are formed as strips from a close-meshed glass fiber fabric, which comes into contact on its underside with the treads 62 and 63 of the steel tapes 64 and 66 as well as with the guide plates 128 and the rectangular hollow profile 76 has very good lubricity and is provided on its upper side with a smooth or almost smooth - "you ten" - plastic coating, which gives the respective band 118 and 119 an overall leather-like flexibility and a passage of dirt or parts from processing resulting chips are reliably prevented.

Instead of such a glass fiber reinforced one Plastic strap could of course also be a leather strap appropriate dimensioning can be provided.

The masking tapes 118 and 119 typically have a thickness of between 1 and 2 mm.

In this - lobed - flexible design of the cover tapes 118 and 119 , it is advantageous if their width b is slightly larger, for example by 1 to 2 mm, than the clear horizontal distance between the frame plate 77 of the bearing box 46 and its inner, vertical Profile leg 58 of its box profile 59 or between the frame plate 78 of the storage box 47 and the box profile inner leg. The respective masking tape 118 or 119 is then forced between these parts , which also act as tape guide elements - the frame plate 77 and the inner profile leg 58 of the box profile 59 of the bearing box 46 or the frame plate 78 of the bearing box 46 and its frame profile, as it were, a little, so that the band longitudinal edges 132 and 133 with slight arching on the frame plates 77 and 78 or the opposite longitudinal guide surfaces of the profile legs 58 of the box profiles fill and thereby practically an extensive "sealing" of the support or barrel roll 41 , 49 , 51 and 52 containing spaces of the storage boxes 46 and 48 is achieved.

This seal results here both along the ascending, the horizontally extending and from the rising sections 118 ', 118 ''and 118 ''' and 119 ', 119 ''and 119 ''' of the masking tape 118 and the masking tape 119 . In order to always keep the running surfaces 62 and 63 of the steel strips 64 and 66 blank, ie, a dirt film formation on the running surfaces as far as possible to avoid, are connected to the provided in FIG. 5 apparent assembly Ab-stripper 134 and 136, one over at least have the entire width of the steel belts 64 and 66 stripping edge 137 and 138 , which preferably each run obliquely to the longitudinal direction of the belt, so that when the strippers 134 and 136 during feed movements of the portal 13 over the running surfaces 62 and 63 slide, there is also an outward "transport effect" in such a way that any dirt that may occur is not only pushed back and forth on the running surfaces, but is laterally wiped off.

The cover device 115 'shown in FIG. 7, the details of which are now expressly referred to in its functionally essential elements, is largely analogous in structure and function to the cover device 115 described with reference to FIGS . 5 and 6. As far as components and functional elements of the covering device 115 'according to FIG. 7, the same reference signs are used as for structural and functional elements of the covering device 115 according to FIGS . 5 and 6, this is to imply the reference to the relevant parts of the description in order to repeat avoid.

In the cover device 115 'is a flexible, for example 1 mm, thick spring steel strip 141 is provided as the cover strip, which between the hold-downs 123 and 124 with the apparent from FIG. 7, undulating course over the intermediate support roller, here the support roller 52nd , is directed. For this purpose, in addition to the hold-down rollers 123 and 124 , seen in the longitudinal direction of the steel strip 141 , a support roller 142 and 143 is arranged between the support roller 52 and the hold-down rollers 123 and 124 , respectively, which the steel strip 141 on its " Support underside "in such a way that the steel band crosses the support roller 52 at a sufficient radial distance from the outer circumferential surface 144 of the outer ring 146 of the self-aligning ball bearing forming the support roller 52 without coming into sliding contact with this outer circumferential surface 144 .

The support rollers 142 and 143 , like the down-holding rollers 123 and 124 on the frame plate 77 and 78 and the box profile 59 of the respective bearing box 46 and 47 of the portal 13 , around horizontal, transverse to the belt longitudinal direction axes 147 or 148 freely rotatable, so that they can - with low rolling friction - roll on the steel belt 141 .

The steel tape 141 used as masking tape of the masking device 115 'must of course be somewhat narrower than the clear distance measured transversely to the tape longitudinal direction of the frame plates 77 and 78 from the respective opposite leg 58 of the box section 59 in order to cause frictional wear of the longitudinal edges of the steel tape 141 to avoid.

For this purpose, it may be suitable to choose the width of the steel strip 141 only a few tenths of a millimeter smaller than the above-mentioned clear distance of the respective frame plate 77 or 78 from the leg 58 of the box profile 59 parallel to it, of the respective bearing box 46 or 47 .

In an expedient design of the cover device 115 'is the steel band 141, however, as not specifically presented, by a few centimeters narrower than this clear width between the frame plate 77 and 78 and the box profile 59 , and there are to the steel band 151 along it Longitudinal edges, lobed resilient sealing strips are attached, which on the opposite, vertical inner surfaces of the frame plate 77 and 78 and the opposite profile leg 58 of the frame profile 59 of the respective bearing box 46 and 47 can slide "sealing" along.

Claims (10)

1. Cover device for guiding elements of the portal of a processing machine designed as a portal machine, which can be moved back and forth on the machine frame by means of support and running rollers mounted on the portal columns, which are designed as roller bearings, for example as pendulum ball bearings, which with their outer bearing rings can be rolled onto raceways which extend in the horizontal direction over the length of the machine frame, within which the portal can be moved back and forth, characterized in that the raceways ( 62 and 63 ) of the support rollers ( 48 , 49 , 51 and 52 ) are covered by means of a flexible masking tape ( 118 or 119 ; 141 ), which are guided by guide elements ( 128 , 129 ; 142 , 143 ) over the support rollers ( 48 , 49 , 51 and 52 ) at a clear distance therefrom , and through both sides the support roll arranged hold-downs ( 121 , 122 , 123 , 124 ) are held in contact with the respective tread ( 62 or 63 ), wherein di e masking tapes ( 118 , 119 ; 141 ) with their ends arranged outside the rolling area of the raceways ( 62 and 63 ) on the machine frame ( 11 ), the width of the masking tapes being significantly - at least 1.5 to 2 × greater than the width of the raceways ( 62 and 63 ).
2. Cover device according to claim 1, characterized in that as hold-down lines ( 121 , 122 , 123 and 124 ) pressure rollers are provided.
3. Cover device according to claim 1 or claim 2, characterized in that as guide elements deflection or support rollers ( 129 ; 142 , 143 ) and / or both on the part of the support rollers ( 48 , 49 , 51 , 52 ) arranged or extending over them Support elements ( 128 and / or 76 ) are provided.
4. Cover device according to claim 1, characterized in that the cover strips ( 118 and 119 ; 141 ) are held under a moderate tension acting in the longitudinal direction.
5. Cover device according to one of the preceding claims, characterized in that at least one of the guide elements is designed as a tensioning element, the position of which can be changed within a sufficient range for tensioning the cover tape ( 118 , 119 ; 141 ), for example horizontally and / or vertically displaceable or is liftable and fixable, and / or at least one of the hold-downs ( 121 ; 122 , 123 , 124 ) is horizontally displaceable and fixable on the portal ( 13 ).
6. Cover device according to one of the preceding claims 1 to 5, characterized in that the cover strips ( 118 , 119 ) on at least one of their end portions used for fixing to the machine frame ( 11 ) can be fixed by means of an elastically stretchable tensioning element on the machine frame ( 11 ).
7. Cover device according to one of the preceding claims, characterized in that the masking tapes ( 118 , 119 ) are formed as a close-meshed glass fiber fabric strips, which are provided on their abge facing the running surfaces with a surface smooth plastic coating.
8. Cover device according to claim 7, characterized in that the hold-downs ( 121 , 122 , 123 and / or 124 ) between longitudinal guide cheeks ( 77 , 78 , 58 ) are arranged, the lateral clearance is slightly, for example by 0.5 to 5 mm is smaller than the width b 'of the masking tape ( 118 , 119 ).
9. Cover device according to one of the preceding claims 1 to 3, characterized in that the cover strips are formed as flexible spring steel strips ( 141 ), and that as guide elements on both sides of the respective support roller ( 48 , 49 , 51 and 52 ) arranged guide rollers ( 142 and 143 ) are provided.
10. Cover device according to claim 9, characterized in that the spring steel cover strip is provided on its longitudinal edges with lobed or rubber-elastic compliant sealing strips, which are cheeked on longitudinal guides ( 77 , 78 , 58 ) of the portal ( 13 ), between which the band ( 141 ) is guided, put on and can slide along it.
DE19883817773 1988-05-26 1988-05-26 Cover arrangement for guide elements of the portal of a processing machine designed as a portal machine Withdrawn DE3817773A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883817773 DE3817773A1 (en) 1988-05-26 1988-05-26 Cover arrangement for guide elements of the portal of a processing machine designed as a portal machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883817773 DE3817773A1 (en) 1988-05-26 1988-05-26 Cover arrangement for guide elements of the portal of a processing machine designed as a portal machine

Publications (1)

Publication Number Publication Date
DE3817773A1 true DE3817773A1 (en) 1989-12-07

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703284A1 (en) * 1993-03-29 1994-10-07 Sud Ouest Systeme Moving gantry with buried rails
EP0810063A1 (en) * 1997-03-06 1997-12-03 Ernst Grob Ag Cover arrangement for guide bars of machines
EP1277521A3 (en) * 2001-07-18 2005-04-27 Dürr Systems GmbH Coating installation with cover belt for a housing aperture
CN103192265A (en) * 2013-03-13 2013-07-10 顺德职业技术学院 Numerical control drilling and tapping all-in-one machine and control method thereof
DE102014213204A1 (en) * 2014-07-08 2016-01-14 Siemens Aktiengesellschaft Optimized tape guidance within the linear guidance of a sliding gantry
CN106270609A (en) * 2016-08-27 2017-01-04 余静远 A kind of hole milling lathe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703284A1 (en) * 1993-03-29 1994-10-07 Sud Ouest Systeme Moving gantry with buried rails
EP0810063A1 (en) * 1997-03-06 1997-12-03 Ernst Grob Ag Cover arrangement for guide bars of machines
EP1277521A3 (en) * 2001-07-18 2005-04-27 Dürr Systems GmbH Coating installation with cover belt for a housing aperture
CN103192265A (en) * 2013-03-13 2013-07-10 顺德职业技术学院 Numerical control drilling and tapping all-in-one machine and control method thereof
CN103192265B (en) * 2013-03-13 2015-07-01 顺德职业技术学院 Numerical control drilling and tapping all-in-one machine and control method thereof
DE102014213204A1 (en) * 2014-07-08 2016-01-14 Siemens Aktiengesellschaft Optimized tape guidance within the linear guidance of a sliding gantry
CN106270609A (en) * 2016-08-27 2017-01-04 余静远 A kind of hole milling lathe
CN106270609B (en) * 2016-08-27 2018-03-06 余静远 A kind of hole milling lathe

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