DE102006003916A1 - Longitudinal body, particularly guide rail of linear guiding device, has marking carrier, which is formed separately from longitudinal body and runs in longitudinal direction on which markings are provided - Google Patents

Abstract

The longitudinal body has a longitudinal axis (5) defining a longitudinal direction. A marking carrier (29) is formed separately from the longitudinal body and runs in longitudinal direction on which the markings are provided. The marking carrier has a number of point-shaped weld joints on its front end one after the other in transverse direction to the marking carrier, on which the marking carrier forms a material fusion area each with support area on the longitudinal body. Independent claims are also included for the following: (1) a device for determining the relative position of two mobile bodies (2) a method for the production of a longitudinal body.

Description

The The present invention relates to a longitudinal body having a longitudinal direction defining the longitudinal axis, in particular a guide rail a linear guide device. The longitudinal body comprises graduations, each along the longitudinal direction of the longitudinal body distributed Positions are assigned and in the course of a relative movement between a relative to the longitudinal body in the longitudinal direction movable further body and the longitudinal body detectable are. The longitudinal body comprises furthermore one separate from the longitudinal body formed and extending substantially in the longitudinal direction of the marking carrier, on the the dimension marks are arranged, wherein the marking carrier associated with its the longitudinal body Flat side with bearing surfaces of the longitudinal body in Contact stands.

The The invention relates in a further aspect to a method for Production of a longitudinal body of mentioned type.

Such a longitudinal body is for example from the EP 1 052 480 B1 known. In the known longitudinal body which can be used as a guide rail of a linear guide device, a measuring tape carrying dimension marks is located on a longitudinal side of the guide rail. Above the measuring tape, a masking tape covering the measuring tape is welded to the side surface of the guide rail, in order to prevent foreign substances from attaching to the measuring tape and possibly falsifying the measurement result or causing long-term corrosion. The masking tape is welded to the guide rail along its longitudinal edges by a weld applied by laser welding. For further details of the known longitudinal body is expressly to the EP 1 052 480 B1 referenced, the disclosure of which is hereby incorporated by reference into the present application.

Of the Invention is based on the object, the known longitudinal body such to further develop that in a simple way a protection of the scale marks guaranteed against foreign materials and an improved manufacturing process for one specify such longitudinal body.

to solution This object is achieved in a longitudinal body of the present invention mentioned type, that the marking carrier at its front end a Plurality of in the transverse direction of the marking carrier successive, essentially punctiform welds has, where the marking carrier with bearing surfaces on Longitudinal body respectively forms a material fusion zone.

At the Front end of the marking carrier are several welded joints set close to each other lying, with the individual welds follow each other so closely that from the front side of the marking carrier ago Foreign matter no longer between the material fusion zones can penetrate through it. The one between the marking carrier and the longitudinal body formed gap or production-related there inevitably existing small Column remains / remain free foreign matter of all kinds, namely both free of foreign bodies made of solid materials as well as free from penetrating liquids. This ensures that a damage the dimension marks or an influence on the measurement result due to penetrating foreign matter can be excluded. In the longitudinal body according to the invention can also this reliable Protection on extremely flexible Guaranteed manner become.

One particular advantage of the longitudinal body according to the invention is that a hermetic sealing of the marking carrier achieved on its front side can be, without elaborate welding machines to form a continuous and tight weld To have to take help. Rather, a sufficiently dense connection in the point welding process be realized with relatively simple means. Thus is it is possible in the construction of a linear guide device the longitudinal body ever individually according to required length cut to length and then using a conventional known welder for a hermetic tight connection of the marking carrier on the front side with to provide the longitudinal body. As a welding machine, for example a common one Hand welder serve.

The individual welds each form a material fusion zone between the marking carrier and support surfaces on the longitudinal body, on which a flat side of the marking carrier rests on the longitudinal body. Since the marking carrier in the Usually, only a small thickness, the material fusion zone on the full thickness of the marking carrier, leaving a welding electrode on the outer flat side of the marking carrier can be recognized.

According to the invention, the welded connections are each point-shaped, ie, for each welded connection, a substantially concentric material fusion zone forms around the attachment point of a welding electrode. In order that a reliable sealing can be ensured, preferably the material fusion zones formed at the front end of the marking carrier are arranged with bearing surfaces of the longitudinal body in such close succession that adjacent border the material merge zones adjacent to each other and / or overlap each other. As a rule, you will manage with a manageable number of five to fifteen welded joints along the front. The material fusion zones can be arranged in a row or in each case offset from one another, with a material fusion zone extending substantially between the two longitudinal sides of the marking substrate being formed after all material fusion zones have been produced. Particularly good tightness is achieved when the marking carrier rests continuously on the longitudinal body and is welded along the material fusion zone (s) continuously and without gaps with this.

In Individual cases, for example, if tightness only opposite coarser foreign bodies guaranteed It may also be sufficient if the individual welds be set so that the formed Materialverschmelzungszonen only in a projection in a direction perpendicular to the longitudinal direction overlap the longitudinal body.

The Material fusion zones can be immediate be formed at the front end of the marking carrier or longitudinal support or but preferably with some distance to the front end of the marking carrier or Longitudinal member trained be to leaky welds due to inaccuracies in the course of the individual welds to avoid. The welded joint according to the invention can be at both opposite Provided front ends of the marking carrier be.

Just if, for example, to build up a linear guide device a plurality of longitudinal bodies in longitudinal direction have to be arranged consecutively, own the individual Longitudinal body often at least on those of their faces, which are pushed against each other should, blunt ends with plan, mutually parallel faces. Lie the faces two such blunt ends of identical cross-section to each other that is, that is an approximate uninterrupted continuation of the guideway without depressions, in which dirt can collect. For attaching a marking carrier one of the long sides surfaces of the longitudinal body brings its design with blunt end, however, disadvantages, because at the then virtually open end face very easily foreign matter under the marker carrier can reach.

A additional Cover of the marking carrier on the long sides of the longitudinal body leads because of for that required additional materi al to disadvantageous unevenness of the guideway. Bring to, um flush final Exterior surfaces too reach, marking carrier and / or Cover in a recess of the longitudinal body, so the result Rule due to different well production techniques (e.g. by grinding, resulting in rounded edges) and marking carrier or Cover (e.g., by an etching process, in which sharp or possibly chamfered edges arise) slight gaps in the connection area between recess and marking carrier or Cover. At the frontal area of the longitudinal body can In addition, an additional cover only by accepting a gap to another adjacent Longitudinal bodies are realized so that at least in reaching to the front surface reaching marker carrier a Cover of the marking carrier from the front surface difficult.

Yet has been shown that by the invention provided closely to each other the following arrangement of individual substantially punctiform welded joints transverse to the longitudinal direction of the marking carrier sufficient tightness for many requirements occurring in practice, especially in Linear guide devices, is achievable.

If the marking carrier in the region of its front end in the longitudinal direction of the longitudinal body over the Survives area, in which the measurement marks can be distributed the material-fusion zones are arranged in the protruding area, so that their education the Maßmarkierungen does not bother. This prevents the sealing of the marking carrier on the Longitudinal body the Accuracy of the dimension marks impaired becomes.

in the the simplest case, in particular when the longitudinal body with already attached thereto marking carrier during assembly (e.g., in a machine tool) to an intended one Length be cut to length should, the marker carrier can flush with the face of the longitudinal body end. A better seal leaves on the other hand, when the Marksträ ger at its front end of the face the rail is slightly behind. The marking carrier can be recessed in a relief-like depression of the longitudinal body and preferably in such a way that the outer surface of the marking carrier is flush with the adjacent outer surfaces of the Longitudinal body is.

Preferably, a masking tape covering the scale marks is provided, which is formed separately from the longitudinal body and extends substantially in its longitudinal direction, the masking tape rests with its flat side facing the longitudinal body on support surfaces of the marking carrier and / or the longitudinal body. If a masking tape is used, the marking carrier is received in the cavity formed between the masking tape and the longitudinal body.

Also The cover strip can be sunk in one of the relief-like depression of the longitudinal body be arranged. Then it is convenient the masking tape is inserted into the recess so that the outer surface of the Masking tape approximately flush with adjacent outer surfaces of the Longitudinal body is. Also, the cover strip can at its front end of the end face of the Longitudinal body or / and of the marking carrier stand back.

The flush Arrangement of the cover strip / marking carrier to the longitudinal body, v. a. around longitudinal Exterior surfaces, offers the widest possible Protection of the dimension marks and the masking tape from mechanical damage. In addition, there is a completely undisturbed movement the other body along the Longitudinal body, being the other body the dimension marks detected. A special advantage with linear guide devices results characterized by the fact that then serves as the second body, moving up a guide rail guided Sled often having a seal in sealing contact with the guide rail stands and the ingress of dirt into the carriage as well as the Lubricant should escape from the carriage. The essentially unified insertion of the cover strip in the guide rail then take care of a minimum of wear the Seal of the carriage.

The relief-like depression, for example, as a stepped depression be educated. If a masking tape is provided then the bearing surfaces for the Masking tape from a support stage arrangement be formed of depression.

The marking carrier or / and the cover strip are also generally connected to bearing surfaces on the longitudinal body, preferably along its / its longitudinal edges extending in the longitudinal direction of the tape. Preferably, this is realized by at least one longitudinal weld extending at a distance from the respective associated longitudinal edge, which can be produced, for example, by laser welding, as is the case with respect to the cover strip in FIG EP 1 052 480 B1 is described, to which again expressly referenced.

Especially in a loaded in a relief-like depression marker carrier can it cheap be when the marker carrier at its the longitudinal body facing Flat side along its longitudinal edges is formed with a chamfer or rectilinear groove. These Chamfer does not need to be too strong, it just has to the area of curvature one formed between the side edge and the bottom of the recess Span the rounding. It is achieved in this way that the marking carrier itself then, if he along his two long edges to the corresponding Side flanks of the relief-like depression is present at the bottom of the relief-like depression fed with its longitudinal body facing flat side rests. It only forms in the area between the chamfer or fillet and the rounding a small cavity. Such Chamfer or groove, for example, by a photochemical etching process extremely easy be formed, for example, such that the two longitudinal edges the voltage applied to the longitudinal body Flat side of the marking carrier not right-angled and sharp-edged, but the flat side through a bevelled area goes into the corresponding longitudinal side. The rich installation of the marking carrier at the bottom of the depression, possibly over its entire width leads to an excellent tightness of each in the transverse direction successive welds.

The marker carrier may comprise a tape measure having at least one track of scale marks distributed in the tape longitudinal direction. The measuring tape can then be finished ready-made regardless of the longitudinal body and, for example, be cut to length comfortably from an endless roller corresponding to a certain length of the longitudinal body. The scale marks on the measuring tape can be formed in many different ways, for example by etching depressions or by impressing magnetic states. For further details on the training of the tape measure or the Maßmarkierungen here on the EP 1 052 480 B1 directed.

Around to obtain a particularly good seal in the area of the front end, the space between the end face of the longitudinal body, the front end of the marking carrier and possibly the front end of the cover strip by a potting compound completed in such a way be that the potting compound flush with the face of the longitudinal body and / or the top of the marker carrier or possibly the top of the cover band closes. By the flush conclusion arises one to the end face outward smooth surface of the Longitudinal body, the running around a sharp-edged push with the face of a allows further longitudinal body.

As potting commercially available curing adhesive resins or casting resins in question. In this variant, it is particularly advantageous if the marking carrier and possibly also the cover strip in the longitudinal direction of the end face of the rail, since by the rear Be Rich a large adhesive surface for the potting compound is available.

Ideally The masking tape is still a bit from the front of the mark carrier, so that a stepped one Construction results.

Preferably is the marker carrier at its front end in the region of the corners by a build-up welding, in particular through a metal powder weld welded to the longitudinal body. at the build-up welding becomes a filler material at the points to be joined together of the marking carrier and the longitudinal body in the Corner area of the marking carrier applied. As filler material is preferably a metal powder from similar Material like the longitudinal body and the marking carrier used (e.g., steel powder). The application can by means of a magnetic spot welding electrode done, dipped in the metal powder and then placed on the workpiece is, wherein the metal powder is brought to melt and with the longitudinal body and Marking carrier, which are also slightly melted, all trained in the corner area Securely closes the column. At the same time an intimate material connection between longitudinal body and marking carrier under the intermediary of the additional material.

Around the build-up welding to facilitate, especially to the molten filler enough To give space and ensure that it is in a flowable state reached all column safely, the marking carrier can be at his Have frontal recesses in the region of its corners. The welding electrode is then placed in the region of the recesses directly on the longitudinal body, around the surfacing joint manufacture.

Around one also in the area of welded joints To achieve all round smooth and sharp-edged surface can be provided be that sweat projections and / or protruding Potting compound are removed in the front ends. For example done by appropriate machining (grinding, polishing o. Ä.).

at Assembly of the marking carrier one is generally anxious, at least the area in which Maßmarkierungen are arranged, so e.g. the area formed by a tape measure, free to keep from wrinkles or distortions, hence the measurement accuracy is affected by unevenness of the marking carrier / Maßbands and movements of the other body be hindered by ripples of the mark carrier / Maßbands. This can be achieved by mounting the marking carrier on at least two in the longitudinal direction of the longitudinal body from each other fixed spaced locations on the longitudinal body is, and is fixed so that the mark carrier between the fixation sites is stretched. The stretch should be such that she has at least an elastic portion, so that the marking carrier by itself the effort shows itself from the stretched state towards to pull together to his resting state. This ensures that that the marking carrier For example, caused by temperature fluctuations length changes of Adjust longitudinal body can form without wrinkles or ripples. The more the stretching of the marking carrier in the elastic range, the better ripples can be compensated become. This thought can also be independent of the training of a sealing weld joint at the front end of the marking carrier be implemented.

To the Stretching the marking body this is preferably a little shorter provided as the required length, for example, cut from an endless tape measure, and by a clamping device so far in the long run pulled until its length the length corresponds to the longitudinal body. Therefor is preferably provided that the marking carrier a first area in which the scale marks are distributed and at least one subsequent to the first region in the longitudinal direction of the longitudinal body second Area includes, in which an attack area arranged for a clamping device is. In this way it can be ensured that by the Engaging the clamping device on the marking carrier not individual Maßmarkierungen damaged or rendered useless. The second area can either be provided only at a front end of the marking carrier, or It can also be provided at each end of a second area.

In addition, in the second region, the fixation points of the marking carrier can lie with the longitudinal body. Then it is ensured that by fixing the marking carrier on the longitudinal body, which is usually done by forming individual spot welds (for example by six individual spot welds), no deformation of the marking carrier in the area in which the Maßmarkierungen are arranged, so that a Falsification of measurement results can be excluded. If desired, the same welding apparatus can be used to fix the marking carrier, which is later also used to seal the connection between masking tape and longitudinal body, so that the production of longitudinal body according to the invention with hermetically sealed dimensional markings on each Installation site can be made locally and at any length of the longitudinal body, without the need for additional equipment would be required.

Of the second area can about it also one parallel to the face of the longitudinal body running Have predetermined breaking point. After installation of the marking carrier on Longitudinal body can then an overhanging one Part of the marker carrier be canceled. The second area can thus, for training one enough stable grommet, sufficiently large be, without in the assembled state on the longitudinal body much space for the second area is wasted. The nominal break point is in this case preferably arranged so that they in the stretched state of the marking carrier ends in the region of the front end of the longitudinal body.

Basically the marking carrier a integrally formed first area with Maßmarkierungen and an integral trained second area at one end or both ends of the marking carrier exhibit. Preferably, however, it is provided that the second area is separate made from the first section and with a front end of the first Area is connected. The connection can be through, for example laser welding respectively.

In especially cheaper Way, the Maßmarkierungen or / and the chamfer and / or possibly further markings and / or the Attack area for a tensioning device (for example, a tensioning eye) or / and the predetermined breaking point photochemical etching form. The measurement marks and the desired breaking point are usually as surface etching be trained while for example a grommet the marking carrier to be provided with an opening.

The longitudinal body according to the invention can be part of a device for determining the relative position of two bodies movable relative to one another, comprising the longitudinal body of said type and a second of the two bodies, which carries a sensor arrangement which responds to the dimension marks and which in the course of a relative movement of the body both bodies travels the marking area and detects signals corresponding to the markings passed over. In the already mentioned EP 1 052 480 B1 are a number of different possible embodiments of the first and second body and possible detection techniques for the Maßmarkierungen explained, the repetition is omitted here and instead expressly to the disclosure of EP 1 052 480 B1 is referenced.

For producing a longitudinal body according to the invention, in a further aspect of the invention, a method is proposed, which comprises the following steps:
Arranging measurement marks in association with positions distributed along the longitudinal direction of the longitudinal body such that the measurement marks can be detected in the course of a relative movement between a further body which is movable relative to the longitudinal body in its longitudinal direction and the longitudinal body,
Attaching a separately formed from the longitudinal body marker carrier on which the Maßmarkierungen are formed, extending substantially in the longitudinal direction of the longitudinal body, wherein the marker carrier is placed with its longitudinal side facing the longitudinal body on support surfaces of the longitudinal body,
Forming a plurality of, in the transverse direction of the marking carrier successive, substantially punctiform welded joints at the front end of the marking carrier, wherein forms at the welded joints of the marking carrier with bearing surfaces on the longitudinal body each a material fusion zone.

As already explained above, the successive welds are set so tight that foreign matter is no longer from the front side of the marking carrier ago can penetrate between the material fusion zones. Preferably become the material fusing zones - at least in one projection in a direction perpendicular to the longitudinal direction of the longitudinal body - in together adjacent manner and / or formed overlapping each other.

As already explained above, the material fusion zones are preferably produced by a spot welder, which can possibly also be a manual welder and on every construction site to disposal stands. The use of an elaborate welding machine is not required. Therefore, it is not necessary the already provided with masking tape and Maßmarkierung longitudinal body to make each order in advance with exact length.

In the method, it can be provided that the marking carrier is formed on the flat side which is to be brought into contact with the longitudinal body along its longitudinal edges with a chamfer or groove. The chamfer can be produced, for example, by photochemical etching and run in a straight line between the flat side and a respective longitudinal side of the marking carrier. It allows a rich concern of the marking carrier on the longitudinal body over its almost the entire width. This allows an excellent tightness of the welded joints in the transverse direction of the Markie achieve a carrier.

Above that marking carrier can additionally one Masking tape to be attached to a particularly effective protection to achieve against penetrating foreign matter.

One between the face of the longitudinal body, the front end of the marking carrier and possibly the frontal End of the cover band formed space, for example, by a Potting compound filled in such a way Be flush that the potting compound with the face of the longitudinal body and / or the top of the mark carrier or if necessary, the cover band closes. As a result, on the one hand, a particularly good seal in the area achieved on the other hand, and on the other hand, a circumferential sharp-edged, smooth completion of the end face of the longitudinal body can be achieved, so another longitudinal body in the Essentially triggered gap-free can be.

Preferably is provided in the area of the corners of the marking carrier Hardfacing method using a melting filler, for a secure closure of gaps formed in the area of the corners to ensure. Particularly suitable is a metal powder surfacing method shown in which a magnetic welding punch with a powdered magnetic or / and magnetizable filler material, in particular a steel powder, is brought into contact, then in the region of a corner of the marking carrier the longitudinal body and / or the marker carrier is put on and the adhesive magnetic filler material together with adjacent areas of the longitudinal body or / and of the marking carrier for Melting is brought.

The hardfacing can be used, for example, as a resistance or induction welding process carried out be in which a conical magnetic welding stamp is used with a flattened tip, which when placed on the marking carrier or / and the longitudinal body one Circuit closes, whereby an electric current flows, that at the welding stamp adhering filler or / and in contact with the welding stamp standing areas of the longitudinal body and of the marking carrier, possibly also the masking tape, melts. The melted Additional material and the melted material of the longitudinal body and of the marking carrier can then fill in any existing column and so for a good one Ensure sealing. In particular, when the welding punch placed directly on the longitudinal body becomes, its material is strongly heated, melted and flows easily in between longitudinal body and marking carrier open column. Therefore, it is advantageous if marker carrier to his Has corners recessed areas, where fixed at the longitudinal body marking carrier the welding stamp placed directly on the longitudinal body can be.

Around smooth surfaces can be provided that welding overhangs and / or protruding Potting compound in the front ends are removed, for example by grinding or other suitable machining processes.

The graduations are preferably arranged on a marking carrier, wherein the marking carrier with the attached dimension marks between two in the longitudinal direction of the longitudinal body from each other spaced points is stretched and then at least two from each other spaced fixation points is fixed to the longitudinal body. The fixation takes place on the longitudinal body preferably by forming respective welding spots, wherein the marker carrier remains stretched between the fixation sites. As before explains The elastic stretching of the marking carrier ensures that this is smooth and without wrinkles and distortions on the longitudinal body applies and about occurring changes in length of the longitudinal body adapts. This thought can also be independent implemented by the formation of a sealing weld at the front end of the marking carrier become.

Around damage of the marking carrier when clamping on the longitudinal body too can avoid in a first region of the marking carrier, the scale marks are arranged, formed in a second region of the marking carrier an attack area for a clamping device and the first and the second area of the marking carrier in longitudinal direction of the longitudinal body to each other subsequently be connected, while stretching a clamping device at the attack area attacks and the marker carrier is fixed in a stretched state on the longitudinal body, by at least one welding point is set in the second area. The tensioning device can, for example a grommet be, in which a corresponding hook element of a relative to the longitudinal body fixable Clamping tool engages. To tighten the marking carrier is then the hook element of the clamping tool moves along the longitudinal body, until the marker carrier a desired Length. By generating one or more spot welds between marking carrier and Longitudinal body in second area can then fix the marking carrier to the longitudinal body be, with the marker carrier maintains its stretched condition.

Of the second area, for example, by laser welding to a Front ends of the first area are welded. This can either already done in advance or also only when mounting a linear guide device on site.

in the marking carrier may be a parallel to the front side of the longitudinal body extending predetermined breaking point be formed, wherein the second region after fixing the marking carrier is broken off along the predetermined breaking point. The second area can thus be a sufficient length exhibit, so he may after fixing the marking carrier on the longitudinal body over the Front side of the longitudinal body out stands. He may possibly even already in the dead state of the marking carrier clearly over survive the rail end. The big supernatant then take care that the clamping tool always secure engagement with the clamping device has, if the marker carrier on the rail rests. If the breaking point is in the second range is designed so that it ends just before the front end of the longitudinal body, you get after canceling the outstanding one Area of the marking carrier a desired one Marking carrier, where not for Measurements usable second area relatively small is.

Of the marking carrier is preferably prepared in a photochemical etching process, wherein the Markings and / or the chamfer and / or possibly the attack area for one Clamping device and / or possibly the desired breaking point formed by photochemical etching become. Here, for example, an endless metal belt for the marking carrier of a supply roll unwound and in a photo treatment station transported and applied there a layer of a photoresist, which is exposed through a photomask. After development of the photoresist the band in the places where no markings and / or other structures should be arranged, a suitably developed paint layer. The tape is then placed in an etching bath dipped, with the etching solution on the paint-free places the corresponding structures in the metal strip into etched. The etched Structures can while surface-like Be structures, about for the dimension marks or a predetermined breaking point or can also be continuous structures, for example, a tether or form said recesses at the corners of the marking carrier.

The Invention will be described below with reference to a preferred embodiment with reference to the accompanying drawings tert erläu closer. It shows:

1 schematically in section a linear guide device in which the various aspects of the invention can be realized;

2 a part of a guide rail of in 1 shown linear guide device with an inserted into a stepped groove and covered by a masking tape measuring tape in a cross-sectional view perpendicular to the longitudinal axis;

3 a cross-sectional view accordingly 2 in a more detailed section and with another variant of a tape measure;

4 a perspective view of the front end of a guide rail according to 1 to 3 with a blunt front end and step groove for the marking carrier and a cover band;

5 a schematic view of the guide rail accordingly 4 with inserted into the step groove marker carrier, wherein the marker carrier is welded to bearing surfaces;

6 a schematic view accordingly 5 a further embodiment with inserted in the step groove marker carrier and overlying masking tape;

7 a schematic view accordingly 6 with filled by a sealing compound front end;

8th a perspective view of a guide rail with clamping device; and

9 a plan view and side view of a metal strip, which is welded as a second area to a tape measure to stretch the tape measure.

1 shows a linear guide device with a on a support base 1 attached guide rail 3 and one on the guide rail 3 along a rail longitudinal axis 5 movably guided runner 7 , The guide rail 3 has a mounting surface 9 with which she is on the support base 1 rests, one of the mounting surface 9 opposite head surface 11 as well as two the mounting surface 9 and the head area 11 connecting side surfaces 13 , The side surfaces 13 the guide rail 3 are each with a trapezoidal retraction 15 Mistake. By not shown bolts, which at regular intervals along the rail longitudinal axis 5 are arranged distributed and the guide rail 3 from the head area 11 prevail ago, is the guide rail 3 with the support base 1 firmly screwed.

The runner 7 surrounds the guide rail 3 approximately U-shaped, with a bridge area 17 the head area 11 the guide rail 3 Benach Bart lies with two by the footbridge area 17 connected leg areas 19 the side surfaces 13 the guide rail 3 is adjacent. The runner 7 is by endless rolling element loops mounted on it 21 rolling on the guide rail 3 guided. The rolling element grinding 21 are in the thigh areas 19 of the runner 7 arranged. Their rolling elements roll on raceways 23 the guide rail 3 starting in the with 25 designated oblique flanks of the trapezoidal return dislocations 15 are formed. Each of the two leg areas 19 of the runner 7 carries two Wälzkörperschleifen each 21 , in such a way that they are symmetrical to one the longitudinal axis 5 containing longitudinal center plane of the guide rail 3 lie. In the rolling elements of Wälzkörperschleifen 21 For example, they can be balls, rollers, barrels or needles.

The applications of the linear guide device are arbitrary. It can be used for example in machine tools for the movable guidance of tools or workpieces, in handling devices or in measuring systems. In all these cases, it is often necessary to know the relative position of the runner 7 along the guide rail 3 to determine exactly, for example, to precisely control machining operations on a workpiece. For this purpose, the linear guide device comprises a generally with 27 designated position measuring device, which as a basic components on the guide rail 3 held tape measure 29 (see also 3 ) as well as one of the runner 7 worn sensor head 31 includes. The measuring tape 29 is essentially over the entire length of the guide rail 3 misplaced, in any case, over the entire range of motion that the runner 7 in the axial direction of the guide rail 3 has relative to this. During a movement of the runner 7 relative to the guide rail 3 the sensor head feels 31 the measuring tape 29 and supplies via a measuring signal line 33 corresponding sensor signals to a particular microprocessor-based evaluation circuit 35 , the position of the rotor based on the obtained sensor signals 7 along the guide rail 3 determined. The sensor head 31 is preferably in direct opposition to the tape measure 29 on the runner 7 arranged so that the scanning of the tape measure 29 through the sensor head 31 is disturbed by external influences, such as external electromagnetic fields, as little as possible. It is conceivable, the sensor head 31 to shield against external stray fields by special shielding elements.

The measuring tape 29 has a variety of equidistant slots 37 on (see 7 ) in the longitudinal direction of the tape measure 29 successively in the measuring tape 29 are incorporated and by webs 39 are separated from each other. The distance d between two successive slots 37 corresponds to the division of the tape measure 29 and is for example 1 mm. The width of the slots 37 is for example 0.5 mm. The bridges 39 are then also 0.5mm wide in this example.

The measuring tape 29 is made of metal, for example steel with a comparatively high nickel content. The bridges 39 then form zones of increased magnetic permeability, whereas the slots 37 Forming zones of reduced magnetic permeability. For scanning the tape measure 29 For example, a field plate can be used with magnetoresistors, which are magnetically biased by a permanent magnet. Alternatively, for example, a Hall probe can be used. Preferably, however, the scanning takes place with the aid of an alternating electromagnetic field, which induces differently strong eddy currents in the measuring tape. This technique, which provides more accurate measurement results than the use of permanent magnets, is in the EP 1 164 358 A1 which is referred to for further details.

The measuring tape 29 should not be replaced during the life of the linear guide device as possible. However, since very rough working conditions can prevail, especially in machine tools, it is desirable to use the measuring tape 29 absolutely protected on the guide rail 3 protected from mechanical impact, such as shocks or impacts, from the action of coolants and lubricants, from the action of other aggressive chemicals and, if desired, from the action of external fields, such as magnetic fields, which are caused by a linear motor. Furthermore, it is desirable, the tape measure 29 so on the guide rail 3 to install that with vibration or vibration loads of the linear guide device no slipping of the tape measure 29 or even a detachment of the same is to be feared.

At the in 1 shown linear guide device is the tape measure 29 in one in the direction of the longitudinal axis 5 extending longitudinal groove 43 housed, which has a receiving channel for the tape measure 29 forms and in the with 45 designated outer surface of the guide rail is formed. The longitudinal groove 43 is preferably in one of the side surfaces 13 between their careers 23 provided, in particular at the bottom of the trapezoidal Rücksetzsetzung 15 this side surface 13 , As an alternative, it is conceivable such a longitudinal groove 43 in the head area 11 the guide rail 3 or in the support base 1 to work in and the tape measure 29 let in it.

The measuring tape 29 is completely in the longitudinal groove 43 sunk. To protect the tape measure 29 is a masking tape 47 (see also 6 ), wel the tape measure 29 in the longitudinal groove 43 completely encapsulated. It protects the measuring tape 29 before the previously mentioned possible external influences. The scan of the tape measure 29 through the sensor head 31 is through the masking tape 47 not disabled. The masking tape 47 is preferably made of metal; For example, the masking tape 47 be formed by about 0.1 mm thick metal foil. Provided the magnetic permeability of the metallic cover band 47 is the same everywhere, the sampling of alternating magnetic permeabilities of the tape measure 29 then through the masking tape 47 not disturbed.

It will now be on the 2 directed. The measuring tape 29 lies flat on the groove bottom of the longitudinal groove 43 on. It is, as will be explained later, only at its tape ends on the guide rail 3 fixed, namely by welding. Optionally, it can do so in the longitudinal groove 43 be impressed that between its band ends in addition by frictional grip on the flanks of the longitudinal groove 43 against lifting off the guide rail 3 is secured. This may be the case in particular when the masking tape 47 not directly on the measuring tape 29 rests, but between these two bands is a small distance.

The masking tape 47 protrudes - when viewed transversely to its longitudinal direction - on both sides of the tape measure 29 out and lies with his two on the tape measure 29 protruding lateral longitudinal edge portions on a respective support level 49 on, in the respective groove flank of the longitudinal groove 43 is trained. The support levels 49 thus form bearing surfaces for the cover 47 , The support levels 49 in the longitudinal groove 43 are designed and dimensioned such that an at least approximately flush transition to the adjacent surface areas of the guide rail 3 consists. If it is only spoken of an approximately flush transition, it should be taken into account that between the narrow-side longitudinal edges of the cover 47 and the lateral flanks of the longitudinal groove 43 occasionally a small gap can not be avoided. This gap is in 2 on both side edges of the cover band 47 at 51 recognizable. Similar and even far larger gaps are between tape measure 29 and the associated lateral flanks of the longitudinal groove 43 to recognize. Such gaps can arise from the fact that the longitudinal groove 43 production reasons no sharp-edged step transitions, but only rounded step transitions, which is the case, for example, if the longitudinal groove 43 by means of a grinding wheel (eg by double groove grinding) in the guide rail 3 is incorporated. The measuring tape 29 or masking tape 47 On the other hand, it is preferably produced in a photochemical etching process and therefore can not be formed so that its side edges follow the rounded course of the step transitions. In the in 2 therefore, it has right-angled longitudinal edges. Although the column 51 usually be so small that they affect the seal of the runner 7 opposite the guide rail 3 If at all - only negligibly affect. However, this column can 51 be disturbing in another way: the tape measure 29 must be hermetically sealed against the outside environment. Therefore, the masking tape 47 along each of its two longitudinal side edges with the guide rail 3 welded. Corresponding welds are in 2 With 53 designated. The welding method used is preferably laser welding. In the column 51 can penetrate liquid and provided the weld 53 is not completely tight or the liquid penetrated over time leads to leaks in the weld, in the gaps between tape measure 29 and associated lateral edge of the longitudinal groove 43 collect. This can lead to measurement inaccuracies.

The welding is done so that a material fusion of the cover 47 with the guide rail 3 in the area of the support levels 49 formed bearing surfaces for the masking tape 47 takes place. It is so through the masking tape 47 welded through. The result of this welding method can be seen in 2 , The welds 53 run at a distance of at most a few mm (in the example shown at a distance of 0.3 mm) from their respective adjacent longitudinal side edge of the cover strip 47 , Immediately on the side edges of the masking tape 47 is essentially no material melt of the cover 47 and in particular also no material fusion of the cover band 47 with the guide rail 3 to observe.

3 shows the clipping on the in 2 Left side in more detail and with improved execution of the tape measure 29 which is a chamfer 28 has at its voltage applied to the groove bottom flat side. Also at the in 3 shown tape measure 29 are clearly two problem areas to recognize, where due to the aforementioned method of production of tape measure 29 and longitudinal groove 43 no complete match of the abutting surfaces is possible and thus in each case a gap or cavity is formed, in which penetrating foreign bodies (dirt, chips, etc.) or liquids can accumulate. First, the longitudinal edge 44 at the bottom of the groove 43 rounded due to the grinding process. In contrast, at the adjacent there edge of the tape measure 29 due to the etching process no corresponding rounding be formed. Would you the tape measure 29 form on its lying on the groove bottom flat side with right-angled edges, so you would have (as in eg 2 indicated) either that Tape measure along its longitudinal edges so far from the lateral flank of the groove 43 spaced, that its longitudinal edge does not reach the rounded area, or accept the fact that the tape measure is not completely fed on the bottom of the groove. This gap or cavitation is undesirable. A certain remedy can be created by the long edge as a flat groove or chamfer 28 formed. Then the tape measure can rest against the groove bottom as well as at its longitudinal edges on the groove surface. But it still forms a cavity 55 between the rounded longitudinal edge 44 and the chamfer 28 in which penetrating liquids can collect and, for example, lead to corrosion, which must be sealed. Another open gap 54 is at the top of the tape measure 29 to see. Here is the corresponding longitudinal edge 46 the longitudinal groove 43 also rounded and the opposite edge 30 of the tape measure 29 sharp-edged.

In 4 is the front end of the guide rail 3 shown in a perspective view. At the in 4 State shown are neither the marker carrier with tape measure and scale marks nor the masking tape on the guide rail 3 attached. Instead, it's on the plane's face 12 seen in 4 right longitudinal side 13 the guide rail 3 the longitudinal groove 43 with the respectively formed on their longitudinal sides support steps 49 , on which the masking tape is placed, to see.

The guide rail 3 ends at her front end blunt with the flat face 12 , The longitudinal groove 43 for the marking carrier extends in the longitudinal direction of the guide rail 3 to the frontal area 12 the guide rail 3 , Also the support levels 49 for the masking tape reach to the face 12 , All side surfaces of the guide rail 3 run to the frontal area 12 parallel to the longitudinal axis 5 (in 4 indicated by a dashed line). The guide rail 3 can do so with its pictured left end face 12 be triggered seamlessly to another guide rail with identically formed right front end.

In 5 is the same area of the guide rail 3 as in 4 shown, but this time in a state with in the longitudinal groove 43 inserted marker carrier, consisting of tape measure 29 and tail welded to it 61 , The measuring tape 29 is a metal band in which the slots 37 and footbridges 39 are incorporated so that they each perpendicular to the longitudinal axis 5 alternately follow each other. At its front end is the tape measure 29 with the tail 61 connected by six substantially punctiform welds 63 (of which in 5 just an example with 63 is designated) at the bottom of the longitudinal groove 43 with the guide rail 3 is welded. The tail 61 is also formed of metal and is preferably made of an endless metal strip with the same width and thickness as the tape measure 29 assembled. The connection of the tail 61 with the tape measure 29 is preferably done by welding. In particular, it makes sense to make the connection by laser welding, because this very small melting zones are made possible and so the welding of the tail 61 with the tape measure 29 the dimension marks 37 . 39 only slightly affected near the weld.

The composite of tape measure 29 and tail 61 at one or both ends of the tape measure 29 forms a marking carrier on which Maßmarkierungen 37 . 39 for detecting the relative position of a longitudinal direction of the guide rail 3 movable body are formed and which on the guide rail 3 is attached.

At the front end of the guide rail 3 extends the marking carrier (more precisely, the Enstück 61 ) in the longitudinal direction to the end face 12 the guide rail 3 , At its front end of the marking carrier forming front end 71 is the tail 61 by a transverse to the longitudinal direction of the marking carrier or the guide rail extending weld (at 73 indicated) with the guide rail 3 welded. The corresponding, parallel to the end face 12 the guide rail 3 running transverse weld 73 is in 5 for the sake of simplicity also indicated as a continuous weld. However, it consists of a plurality of individual, substantially punctiform welded joints, which are set so close together that their respective substantially concentric material fusion zones form a continuous weld. The individual substantially punctiform welds of this weld are set successively in the spot welding process in such a way that the respectively resulting substantially concentric material fusion zones 73 between the tail 61 and the guide rail 3 overlap each other in pairs.

The transverse weld 73 extends substantially between the two longitudinal edges of the tail 61 parallel to the front side and in the longitudinal direction, slightly set back from the front side. It also does not extend all the way to the two longitudinal edges, but ends up slightly offset inwards approximately at the level of the extension of one of the three individual welds 63 at which the tail 61 on the guide rail 3 attached, imaginary line.

The tail 61 possesses at its the front end 71 of the marking carrier forming corners in about quarter-circular recesses 72 , In these recesses is in 5 one welded joint each 66 between the tail 61 and the guide rail 3 to recognize. This weld joint is made by a build-up welding process in which a steel powder is passed through a head-flattened magnetic spot welding electrode in the region of the recesses 72 on the surface of the guide rail 3 is applied and then together with adjacent material of the guide rail 3 and the tail 61 is merged. In this way, a particularly good seal in the area of the corners, as the molten material results in any in between tail 61 and guide rail 3 safely fills and closes gap formed.

This ensures that the tailpiece 61 and tape measure 29 formed marking carrier along its entire edge without gaps on the guide rail 3 rests and the edge of the marking carrier also at its front end 71 hermetically sealing with the guide rail 3 is welded. It is thus prevented that foreign substances, in particular liquids or tiny solids penetrate and possibly cause corrosion or - if the foreign substances are electrically conductive - falsify the measurement result. The frontal seal between marking carrier and guide rail 3 can be done entirely by using a spot welder, so that it is also possible to cut a predetermined length when mounting a linear guide unit of a prefabricated guide rail with already fixed along the longitudinal edges marker carrier and then hermetically seal in the manner described at the exposed front end.

The tail 61 ends in 5 flush with the face 12 the guide rail 3 , At its front end 71 is - as will be explained in more detail later - a predetermined breaking point 64 formed, at which the tail 61 can be canceled by a longer tail band material, which for attaching the tape measure 29 on the guide rail 3 serves.

As material for the tail 61 For example, a simple strip-shaped sheet material may be used, it being favorable if its thickness is substantially that of the measuring tape 29 equivalent. For example, an endless mesh belt material may be used.

To Completion of the welded joint is the surface of the marking carrier in the area of the welded joint machined to sharp edged transitions from the cover strip to the guide rail to avoid.

Preference is given to an end piece 61 the in 5 shown type on both opposite ends of the tape measure 29 welded. The arrangement of tape measure 29 and tail 61 in the longitudinal groove 43 with respect to the respective front end of the guide rail 3 is then the same at both ends. The arrangement at the in 3 to 7 shown front end opposite end face of the guide rail 3 is a mirror image of the arrangement shown. On a separate presentation is therefore omitted.

Finally, it should be mentioned that the tail 61 at his in the in 5 shown state of the outside facing flat side a mark 67 carries, by means of which the two flat sides of the tail 61 can be distinguished from each other. At the in 5 shown guide rail 3 can help protect the marker carrier 29 . 61 still through one on the support levels 49 Covered cover tape to be covered.

6 and 7 show a further embodiment of a guide rail 103 with label carrier in which the label carrier 129 . 161 through a masking tape 147 is covered. As far as the same or equivalent components as in 1 to 5 will be in 5 same reference numerals used, but increased by 100 , Unless otherwise stated in the explanations below, reference is made to the preceding explanations for the description of these components.

At the in 6 shown guide rail 103 is the tape measure 129 with tail 161 through a masking tape 147 covered, which is the width of the longitudinal groove 143 plus the two support levels 149 owns and on the support levels 149 is up. The masking tape 147 is along its longitudinal edges with the support steps 149 preferably welded by laser welding, wherein the formed welds 153 by a maximum of a few millimeters (eg 0.3 mm in the example shown) from the respective longitudinal edge of the cover strip 147 are spaced. The welds 153 run along the longitudinal edges of the cover band 147 continuous, allowing the ingress of foreign matter along the longitudinal edges of the cover band 147 is excluded.

Located in the between masking tape 147 and guide rail 103 formed cavity carrier (of which in 6 only the tail 161 is visible through six single point welds 163 (in 3 only two are visible) on the guide rail 103 attached. The front end 171 of the marking carrier 129 . 161 is in the longitudinal direction of the end face 112 the guide rail 103 reset. The front end 174 of the above the marker carrier 129 . 161 lying masking tape 147 is also longitudinally from the front end 171 of the marking carrier reset. This results in a stepped structure of the front ends 171 . 174 of marker carrier 129 . 161 and cover band 147 ,

The marking carrier in 6 and 7 is not like the marker carrier in 5 provided at its front end with a transverse weld, but only to the with 163 designated locations on the guide rail 103 welded. Nevertheless, a sufficient seal against the front end 171 respectively. 174 To ensure the penetration of foreign matter is, as in 7 you can see it between the frontal area 112 the guide rail 103 and the front end 171 of the marking carrier 129 . 161 or the front end of the cover 147 formed space by a potting compound 176 completed. The potting compound 176 thus completely prevents the ingress of foreign substances. It is flush with both the outer flat side of the cover 147 as well as with the face 112 the guide rail 102 , leaving a smooth surface on the longitudinal surface 113 the guide rail 103 as well as on her face 112 results. This can be done on the face 112 readily a similar guide rail 103 be triggered gap-free.

Finally, it should be noted that the in 5 respectively. 6 and 7 embodiments shown do not exclude each other. So can at the in 5 shown variant readily a reset at the front end ending masking tape 47 on the support levels 49 be applied and then applied a potting compound, as in 7 shown to get extra tightness. Also at the in 6 and 7 variant shown, it is conceivable, in addition to the front end of the marking carrier a transverse weld or / and in the region of the corners recesses with weld overlay gem. 5 train.

The guide rail 3 the linear guide device according to 1 to 7 is usually cut to length with a length required for the particular application of a rail track, which is produced for example as a continuous strand by continuous casting or extrusion. The rail tracks are rolled in 6m long pieces, then cold drawn and ground to get their final profile. Then, this rail track is provided with Maßmarkierungen, for example by a tape measure is attached to a side surface.

In 8th is such a track 203 with attached measuring tape 229 shown. The guide rail 203 should represent the in 1 to 7 shown guide rail 3 . 103 in a merely schematic form for explaining the attachment of the tape measure 229 on the guide rail 203 serve. Therefore, such components are in the 1 to 7 correspond to components shown in 8th denoted by the same reference numerals but opposite 1 to 5 increased by the number 200 , Unless otherwise stated in the following explanations, the description of these components is based on the preceding comments on the 1 to 7 directed.

This in 8th shown measuring tape 229 is at its two front ends, each with an end piece 261 connected (in 8th each with 261a and 261b designated), so that the tape measure 229 together with the two end pieces 261a . 261b forms a marking carrier. At his 8th upper end is the tail 261a already at two fixation points 263a on the guide rail 203 fixed, preferably by resistance spot welding. The front end of the tail 261a in 8th on the right side is flush with the corresponding frontal end on the in 8th right side of the guide rail 203 arranged.

The one from the tape measure 229 and the two end pieces 261a . 261b formed marking carrier has a length which is slightly smaller than the total length of the guide rail 203 , Therefore, the marking carrier after the tail 261a on the guide rail 203 has been fixed by means of a stretching device 257 stretched elastically before moving to his other tail 261b on the guide rail 203 is fixed. In 8th is a suitable stretching device 257 shown in a highly simplified schematic form. This stretching device 257 includes a fixable on the rail track clamping part 259 and a relative to the clamping part 259 adjustable active part 260 , The active part 260 has a gripper 262 that on the tail 261b the mark carrier can attack. This is on the tail 261b a recess 269 formed by the gripper 262 can reach through. By the gripper 262 on the tail 261b attacks and not directly on the tape measure 229 attacks, is avoided by the gripper 262 while stretching the tape measure 229 the scale marks are damaged.

With the reference number 265 is in 8th one for adjusting the active part 260 relative to the clamping part 259 Serving micrometer indicates their Verstellmaß the scale arrangement 267 can be read. After pressing the micrometer screw 265 a desired elongation of the marking carrier 229 . 261a . 261b is set, the mark carrier 229 . 261a . 261b also on the other end (in 8th on the lin ken side of the guide rail 203 ) on the guide rail 203 fixed. This in turn is preferably done by spot welding, with one or more welds in the region of the tail 261b be set. By fixing between its band ends (or between the end pieces firmly connected with its band ends 261a . 261b ) becomes the tape measure 229 thus held under a Dehnvorspannung, which ensures that the tape measure 229 always punishes the guide rail 203 invests. This allows any ripples of the tape measure 229 be smoothed, which may arise, for example, during operation of the guide device when strong temperature differences occur, or which may also occur because of the tape measure 229 and / or the tails 261 an endless strip material is used, which is unwound from a supply roll.

The marking carrier 229 . 261a . 261b with the measuring tape stretched to its intended length 229 and the tightly connected with this end pieces 261a and 261b is now on the in 8th left end something about the corresponding front end of the guide rail 203 in front. The slot 269 for the gripper 262 is in this protruding area. To the marking carrier to the length of the guide rail 203 to fit, includes the tail 261b a predetermined breaking point 264 between the grommet 269 and the junction of the tail 261b to the tape measure 229 is arranged and in the intended strain state of the tape measure 229 approximately in the area of the frontal area 212 the guide rail 203 lies. At this target break point 264 after the marking carrier has been fixed, the projecting area becomes 270 aborted, leaving the marker carrier slightly set back from the end face 212 the guide rail 203 ends.

9 generally shows 61 denotes one of the end pieces, which are at the front ends of the tape measure 29 be welded, in a state before the connection of the tail 61 with the tape measure 29 in a plan view and in a side view. One recognizes on the in 9 right side the connection area of the tail 61 with the front end of the tape measure 29 , On the in 9 left side of the tail 61 is a through hole 69 formed, which in the manner of a tension lug as a point of attack for the gripper 162 the clamping device 157 serves. The tail 61 is made of a band-shaped metal material, and may for example be made of the same material as that for the tape measure 29 is used.

On the right side of the tail 61 in 9 is a mark 67 to see through which with the barely visible chamfer 28 trained flat side clearly from the flat opposite flat side of the tail 61 can be distinguished. Next is in 9 a predetermined breaking point 64 indicated, which are parallel to the end faces of the tail 61 runs and, as seen in the side view, one between the longitudinal sides of the tail 61 continuous material weakening zone forms. Along this target break point 64 can the in 9 left part of the tail 61 in which also the eyelet 69 is formed to be canceled after the marking carrier has been stretched to a required length ge and was fixed at its two ends on the guide rail. In order to ensure a good breakability, is preferably the tail 61 made of a relatively brittle material.

You can in 9 recognize that the breaking point 64 very close to the 9 right edge is arranged at which the tail 61 with a tape measure 29 is welded. The thus resulting considerable length of that part of the tail 61 which is broken off and in which the tether 69 is formed, causes this part even in the de-energized state protrudes significantly beyond the front end of a guide rail. A clamping tool can safely intervene in a mounted on the guide rail marker carrier and this span, without the tape measure 29 to damage.

With 72 are in 9 at the edges of the band 61 Recessed approximately semicircular areas referred to each other, and between which the predetermined breaking point 64 runs. These recessed areas lead after canceling the in 9 left part of the band 61 for the formation of quarter-circular recesses 72 at the frontal corners of the marking carrier (see 5 ). In the area of these corners the build-up welding is carried out.

Both the target break point 64 as well as the eyelet 69 , the mark 67 and cutouts 72 For example, by a photochemical etching process in the tail 61 be incorporated. For this purpose, for example, an approximately 0.3 m thick endless metal belt is unwound from a supply roll and transported to a photo-treatment station in which a - comparatively short - section of the metal strip coated with a photoresist, exposed, developed and immersed in an etching bath to corresponding structures in to etch the material of the metal strip into it. This can preferably be done in a two-stage process, wherein when immersing the in 9 right edge of the metal strip only surface etching to form a predetermined breaking point 64 or a mark 67 be etched while immersing the in 9 left edge of the metal strip continuous recesses to form a tether 69 as well as the semicircular recesses 72 be etched. In addition, it should be mentioned that the structures for the formation of slots and webs in the tape measure 29 can be formed by a corresponding etching technique. For details please turn to the EP 1 052 480 B1 directed.

Claims (40)

Longitudinal body with a longitudinal axis defining a longitudinal direction ( 5 ), in particular guide rail ( 3 ; 103 . 203 ) of a linear guide device, comprising: dimension markings ( 37 . 39 ) associated with respective positions distributed along the longitudinal direction of the longitudinal body and being detectable in the course of a relative movement between a further body movable relative to the longitudinal body in the longitudinal direction and the longitudinal body, a marking carrier formed separately from the longitudinal body and extending substantially in its longitudinal direction, ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) on which the scale marks ( 37 . 39 ), wherein the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is in contact with its longitudinal body associated flat side with bearing surfaces of the longitudinal body, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at its front end ( 71 ; 171 ) a plurality of in the transverse direction of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) has successive, essentially punctiform welded joints on which the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) with bearing surfaces on the longitudinal body each have a material fusion zone ( 73 ). A longitudinal body according to claim 1, characterized in that at the front end ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) formed material fusion zones ( 73 ) with the bearing surfaces of the longitudinal body - at least in a projection in a direction perpendicular to the longitudinal direction ( 5 ) of the longitudinal body - adjoin one another and / or overlap one another. Longitudinal body to Claim 1 or 2, characterized in that the longitudinal body to at least one end face has a blunt end. Longitudinal body according to one of claims 1 to 3, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at its front end ( 71 ; 171 ) protrudes in the longitudinal direction of the longitudinal body over the area in which the Maßmarkierungen ( 37 . 39 ), the material fusion zones ( 73 ) are arranged in the protruding area. Longitudinal body according to one of claims 1 to 4, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at its front end ( 71 ; 171 ) from the end face ( 12 ; 112 ) of the longitudinal body is set back. Longitudinal body according to one of claims 1 to 5, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) in a relief-like depression ( 43 ; 143 ) of the longitudinal body is arranged sunk. Longitudinal body according to one of claims 1 to 6, characterized by the dimensional markings ( 37 . 39 ) covering masking tape ( 47 ; 147 ), which is formed separately from the longitudinal body and substantially in the longitudinal direction ( 5 ), wherein the masking tape ( 47 ; 147 ) with its longitudinal body facing flat side on bearing surfaces of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and / or the longitudinal body rests. A longitudinal body according to claim 6 or 7, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and / or the masking tape ( 47 ; 147 ) into the relief-like depression ( 43 ; 143 ) is / are inserted, that the outer surface of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) or masking tape ( 47 ; 147 ) along its longitudinal edges is approximately flush with adjacent outer surfaces of the longitudinal body, wherein optionally the masking tape ( 47 ; 147 ) at its front end ( 74 ; 174 ) from the end face ( 12 ; 112 ; 212 ) of the longitudinal body or / and the front end ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) stands behind. Longitudinal body according to one of claims 6 to 8, characterized in that the relief-like depression ( 43 ; 143 ) is formed as a stepped recess, and the bearing surfaces for the cover strip ( 47 ; 147 ) from a support stage arrangement ( 49 ; 149 ) of the depression ( 43 . 143 ) are formed. Longitudinal body according to one of claims 1 to 9, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and / or the masking tape ( 47 ; 147 ) along its longitudinal edges extending in the strip longitudinal direction, preferably at a distance from the respective associated longitudinal edge and by laser welding, by at least one longitudinal weld seam ( 53 ; 153 ) is connected to bearing surfaces on the longitudinal body / are. Longitudinal body according to one of claims 1 to 10, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) on its side facing the longitudinal body flat side along its longitudinal edges with a chamfer ( 28 ) educated is. Longitudinal body according to one of claims 1 to 11, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) a tape measure ( 29 ; 129 ; 229 ) with at least one track of scale marks distributed in the longitudinal direction of the band ( 37 . 39 ). Longitudinal body according to one of claims 1 to 12, characterized in that the space between the end face ( 12 ; 112 ; 212 ) of the longitudinal body, the front end ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and possibly the front end ( 74 ; 174 ) of the masking tape ( 47 ; 147 ) by a potting compound ( 176 ) is filled in such a way that the potting compound ( 176 ) flush with the end face ( 12 ; 112 ; 212 ) of the longitudinal body or / and the top of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) or possibly the top of the cover ( 47 ; 147 ) completes. Longitudinal body according to one of claims 1 to 13, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at its front end ( 71 ; 171 ) is welded in the region of the corners by a build-up welding, in particular by a metal powder welding with the longitudinal body. Longitudinal body according to one of claims 1 to 14, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at its front end ( 71 ; 171 ) Recesses ( 72 ) in the region of its corners. Longitudinal body according to one of claims 1 to 15, characterized in that welding projections or / and projecting potting compound ( 176 ) are removed in the area of the front ends. Longitudinal body according to one of claims 1 to 16, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) at at least two spaced apart in the longitudinal direction of the longitudinal body bodies ( 63 ; 163 ; 263 ) is fixed to the longitudinal body, wherein the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) between the fixation sites ( 63 ; 163 ; 263 ) is stretched. Longitudinal body according to one of claims 1 to 17, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) a first area ( 29 ; 129 ; 229 ), in which the measure marks ( 37 . 39 ) and at least one to the first area ( 29 ; 129 ; 229 ) in the longitudinal direction of the longitudinal body subsequent second area ( 61 ; 161 ; 261a . 261b ), in which an attack area ( 69 ; 169 ; 269 ) for a tensioning device ( 157 ) is arranged. A longitudinal body according to claim 18, characterized in that, on which a second area ( 61 ; 161 ; 161a ; 161b ) end face ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) the fixation sites ( 63 ; 163 ; 263 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) in the second area ( 61 ; 161 ; 161a ; 161b ) lie. A longitudinal body according to claim 18 or 19, characterized in that the second region ( 61 ; 161 ; 161a ; 161b ) one parallel to the end face ( 12 ; 112 ; 212 ) of the longitudinal body extending predetermined breaking point ( 64 ; 164 ; 264 ) having. A longitudinal body according to any one of claims 18 to 20, characterized in that the second region ( 61 ; 161 ; 261a ; 261b ) with a front end of the first area ( 29 ; 129 ; 229 ) connected is. A longitudinal body according to claim 21, characterized in that the second region ( 61 ; 161 ; 161a ; 161b ), preferably by laser welding, to the front end of the first area ( 29 ; 129 ; 229 ) is welded. Longitudinal body according to one of claims 1 to 22, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is produced by photochemical etching, wherein the markings ( 37 . 39 ) and / or possibly the chamfer ( 28 ) and / or possibly the attack area ( 69 ; 169 ; 269 ) for a clamping device and / or possibly the predetermined breaking point ( 64 ; 164 ; 264 ) are formed by photochemical etching. Device for determining the relative position of two relatively movable bodies, comprising a first of the two bodies ( 3 ; 103 ; 203 ) according to one of the preceding claims and a second of the two bodies ( 7 ), one on the scale marks ( 37 . 39 ) bears responsive sensor arrangement, which travels in the course of a relative movement of the two bodies the marking area and signals corresponding to the crossed markers ( 37 . 39 ) detected. Method for producing a longitudinal body with a longitudinal axis defining a longitudinal direction ( 5 ), in particular a guide rail ( 3 ; 103 ; 203 ) of a linear guide device, comprising the steps of: arranging measurement marks ( 37 . 39 ) in association with positions distributed along the longitudinal direction of the longitudinal body such that the dimension markings ( 37 . 39 ) in the course of a relative movement between a relative to the longitudinal body in the longitudinal direction thereof movable further body and the longitudinal body can be detected, attaching a separate from the longitudinal body formed marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) on which the dimension marks ( 37 . 39 ) are formed, substantially in the longitudinal direction extending on the longitudinal body, wherein the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is placed with its the longitudinal body facing flat side on bearing surfaces of the longitudinal body, characterized in that at the front end ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) a plurality of in the transverse direction of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is formed successive, substantially punctiform welded joints, at which the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) with bearing surfaces on the longitudinal body each have a material fusion zone ( 73 ). A method according to claim 25, characterized in that the material fusion zones ( 73 ) - at least in a projection in a direction perpendicular to the longitudinal direction of the longitudinal body - are formed in an adjacent manner and / or overlapping manner. Method according to claim 25 or 26, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) on that flat side, which is to be brought into abutment with the longitudinal body, along its longitudinal edges with a bevel ( 28 ). Method according to one of claims 24 to 27, characterized in that above the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) a masking tape ( 47 ; 147 ) is attached. Method according to one of claims 24 to 28, characterized in that a between an end face ( 12 ; 112 ; 212 ) of the longitudinal body, the front end ( 71 ; 171 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and possibly the front end ( 74 ; 174 ) of the masking tape ( 47 ; 147 ) formed space by a potting compound ( 176 ) is filled in such a way that the potting compound ( 176 ) flush with the front ( 71 ; 171 ) of the longitudinal body or / and the top of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) or possibly the top of the cover ( 47 ) completes. Method according to one of claims 24 to 29, characterized in that in the region of the corners of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) a build-up welding process using a melting filler material is performed. A method according to claim 30, characterized in that a metal powder build-up welding method is carried out, in which a magnetic welding punch with a powdered magnetic and / or magnetizable filler material, in particular a steel powder is brought into contact, then in the region of a corner of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) on the longitudinal body or / and the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) and the adhering magnetic filler material together with adjacent regions of the longitudinal body or / and of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is melted. Method according to one of claims 24 to 31, characterized that a resistance or induction welding process is performed. Method according to one of claims 24 to 32, characterized that a conical welding stamp is used with a flattened tip. Method according to one of claims 24 to 33, characterized in that when placing the welding punch on the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) or / and the longitudinal body an electric current flows, which brings the filler material to melt. Method according to one of claims 24 to 34, characterized in that welding projections or / and projecting potting compound ( 176 ) are removed in the area of the front ends. Method according to one of claims 24 to 35, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) between two spaced apart in the longitudinal direction of the longitudinal body bodies ( 69 ; 169 ; 269 ) and then at least two spaced fixation sites ( 63 ; 163 ; 263 ) is fixed to the longitudinal body, preferably by forming respective welds, wherein the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) between the fixation sites ( 63 ; 163 ; 263 ) remains stretched. Method according to claim 36, characterized in that in a first area ( 29 ; 129 : 229 ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) the dimension marks ( 37 . 39 ), in a second area ( 61 ; 161 . 261a . 261b ) of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) an attack area ( 69 ; 269 ) for a tensioning device ( 157 ) is formed and the first and the second region of the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) are subsequently connected to each other in the longitudinal direction of the longitudinal body, wherein when stretching a Spanneinrich attack on the attack area and the marker carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is fixed in a stretched state on the longitudinal body by at least one punctiform welded joint in the second region ( 61 ; 161 ; 261a . 261b ) is set. Method according to claim 37, characterized in that the second area ( 61 ; 161 ; 261a . 261b ) to a front end of the first area ( 29 ; 129 ; 229 ) is welded, preferably by laser welding. Method according to claim 37 or 38, characterized in that in the second area ( 29 ; 129 ; 229 ) a parallel to the end face of the longitudinal body extending predetermined breaking point ( 64 ; 164 264 ) and the second area ( 61 ; 161 ; 261a . 261b ) after fixing the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) along the predetermined breaking point ( 64 ; 164 ; 264 ) is canceled. Method according to one of claims 24 to 39, characterized in that the marking carrier ( 29 . 61 ; 129 . 161 ; 229 . 261a . 261b ) is produced by photochemical etching, wherein the markings and / or possibly the chamfer ( 28 ) and / or possibly recesses ( 72 ), or / and possibly the attack area ( 69 ; 169 ; 269 ) for a clamping device and / or possibly the predetermined breaking point ( 64 ; 164 ; 264 ) are formed by photochemical etching.