DE29911075U1 - Connection of a rail with a flat object for storage in a folder - Google Patents

Description

Patent Attorney'DlplMngVLa'mben'Efchelbaum

D-45659 Recklinghausen Krüppeleichen 6

Telephone: (02361) 21091-2 Fax: (02361) 22949

21 June 1999 Hi 2647a/99

Applicant:

Dr. med. dent. Rüdiger HIRDES
Kleinherbeder Str. 9a, 58455 Witten

"Connection of a rail with a

flat object for storage in a folder"

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Description :

The invention relates to a connection of a rail to a flat object, such as a document, a plastic filing strip, a cover or the like, with several recesses for storage in a folder, a filing device or a filing bracket, wherein the rail has a U-shaped cross-section which encompasses the filing edge of the flat object with its two U-legs.

Such rails, known under the term "durable clamp rails" or "HELIT G clip rails" in the form of plastic clamp rails, have closed recesses in a bar that adjoins the web between the two U-shaped legs of the filing rail. This bar, which extends from the U-legs in opposite directions, creates a clamp rail that extends far beyond the filing edge of the flat object and therefore requires a larger format for filing in a folder, a filing device or a filing bracket. Otherwise there is a risk that the side of the flat object opposite the filing edge protrudes from the folder and can therefore be damaged. This applies to all formatted sizes of the flat objects, in particular the DIN A4 format.

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In addition, the state of the art also includes hanging binding strips, which consist of a plastic strip with two circular closed openings, two metal binding tongues and a perforated metal rail that is placed on top.

Both these hanging binding strips and the aforementioned clamping rails have the particular disadvantage that in order to remove them, for example from a folder, the folder must be opened completely and all the clamping rails or hanging binding strips previously in it with their flat objects, for example documents, envelopes or the like, must be pushed or rolled over the ring brackets of the folder, the opening mechanism of the ring brackets then operated and only then can the clamping rail or the hanging binding strip with the documents, documents, envelopes or the like held in it be removed from the folder. This process of both removing such a hanging binding strip from a clamping rail and reinserting it is not only laborious, but also involves a considerable amount of time. In doctor's offices or hospitals, a doctor often has to remove an X-ray image stored in such a clamping rail or hanging binding strip as quickly as possible, for example from a folder, for a quick look and then immediately reinsert it. Likewise, a lawyer often has to

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You can remove a document from a folder and then insert it back into it after a quick look. During this process, the closed ring brackets are often moved when the bulging folder contents are rolled over and partially opened under the pre-tension of the folder contents being turned over, which can cause some clamping rails and/or the hanging binding strip to fall out and have to be reinserted in the right place again in a time-consuming search.

The inventors of so-called hook-in binders have already recognised this disadvantage and for this reason have created a hanging file system with either hook-in binders or hanging rails, which in conjunction with cardboard covers form a solid unit and can be quickly removed from a hook-in hanging file system and reinserted. However, the disadvantage is the large amount of space required by such binders, whose thickness, particularly on the side of the binding edge with the reinforcing rails, which are usually made of tinplate, is several times greater than the thickness of a document, film or the like to be stored in them, which makes archiving particularly thin, flat objects such as papers, films, documents or the like very space-consuming. For this reason, a binder of this type with a hook rail or hanging rail is used for storing flat objects such as papers, plastic filing strips, envelopes or the like.

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Hooking strip is not taken into consideration. This is where the invention comes in.

The aim of this is to create a connection between a rail and a flat object of the type mentioned at the outset, which can be removed quickly and without great effort from its storage in the form of a folder, a filing device or a filing bracket or the like and can be reinserted into this storage with the flat object just as quickly and without complications.

This object is achieved in connection with the generic term mentioned at the outset according to a first embodiment in that the flat object is provided on its binding edge with a plurality of elongated holes which are closed on their circumference and run parallel to the binding edge and with a plurality of recesses arranged between them and open towards the binding edge, while in both legs of the overlapping rail a plurality of recesses which are open towards the binding edge and form a projection and which are congruent with one another as well as at least two spaced-apart retaining tongues which are guided in a form-fitting manner in the elongated holes of the flat object are arranged, wherein by a relative displacement of the rail to the flat object the recesses in the binding edge of the flat object can be opened, narrowed or closed by the projections in the recesses of the rail.

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This connection has the incomparable advantage that, unlike the clamping rails of the prior art, it does not extend beyond the format of the flat object it holds, so that the relative size of the flat object to the size of the usual folders, filing devices or filing brackets is maintained. The considerably more far-reaching advantage is that the rail with the flat object it holds can be quickly removed from, for example, a folder, without having to roll the rails in front of it with their flat objects over the ring brackets before they can open with all the disadvantages already described. To do this, for example, in a folder, all that is needed is to grasp the rail, which is advantageously provided with a writing field at one end, with one hand, then place the other hand or a piece of paper in this place, pull the end of the rail outwards into an open position and then pull the rail with the flat object it holds sideways out of the folder, filing device or filing bracket. The folder's closing and opening mechanism does not need to be activated for this sideways pulling. After viewing the document, film or other flat object held by the rail, it can be quickly hooked back onto the folder's top ring bracket, aligned with the adjacent flat objects, and then pushed back onto the other

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The ring bracket is swung in and the rail is then pulled at its lower end back towards the lower edge of the folder to narrow the recesses in the flat object that are open towards the binding edge, thus narrowing or closing the recesses in the binding edge of the flat object that were open up to that point.

This process of removing and reinserting takes considerably less time than the time required to completely open, turn over, re-arrange and re-seal the familiar flat objects in a folder, filing device or similar with the ring brackets. Due to the relative mobility of the rail to the filing edge of the flat object it holds, each individual flat object is now provided with its own opening and closing mechanism, whereby the opening and closing mechanism of the folder, filing device or filing bracket now only serves as a holder.

According to an advantageous development of the invention, the retaining tongues in the rail have a circular diameter that is slightly smaller than the leading elongated holes in the binding edge of the flat object and are formed by protrusions that engage in the space between the two legs of the rail. As a result, these protrusions can engage in the closed elongated holes of the flat object and thus the entire

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The rail can be moved in a form-fitting manner relative to the flat object in these elongated holes. In order to ensure that the flat object can be moved by pulling or pushing and that it is always held securely and without disruption, the retaining tongues are alternately embossed into both opposite legs of the rail, which ensures that the flat objects are held by both legs.

The engagement depth of the retaining tongues advantageously extends over the entire slot depth of the flat object.

Advantageously, the congruent recesses in the legs of the rail each have an elongated hole running parallel to the outer edge of the rail with a semicircular bottom side at one end of the elongated hole and two leg sides that run transversely to the outer edge of the rail and diverge from one another at the other open end of the elongated hole. This creates a hook strip in the rail that allows the rail to be hooked in and swiveled in together with the flat objects held between the legs, for example a folder, a filing device or a filing bracket. Due to the hook-shaped design of these recesses, the rail with the flat object held by it can be guided along the ring brackets of a folder, for example, in a sliding manner and without visual contact, until the top bracket is in

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the corresponding top slotted hole of these recesses has run down to the bottom side. The rail can then be swung in clockwise so that it is aligned with the other flat objects, e.g. in a folder, until it comes into contact with all the brackets of the folder underneath. To do this, the ring brackets of the folder do not need to be loosened or opened in any other way.

This hooking is further facilitated if the upper slot, which serves as a pivot axis, in the congruent recesses of the rail is provided with a greater length than the slots located below it.

In order to prevent the retaining tongues in the closed elongated holes from accidentally moving after the open recesses in the flat object have been closed, thus preventing the rail from coming loose from the folder together with the flat object it holds, the retaining tongues of the rail are guided in the closed elongated holes in the binding edge of the flat object against frictional forces which hold the rail in the respective relative position against its gravity.

As a result, the rail can never be moved independently, e.g. under gravity or inertial forces, but only by forces deliberately applied from the outside relative to the flat object it is holding, thus preventing unwanted loosening.

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To clearly define a specific closed position of the otherwise open recesses of the flat object, the length of the elongated hole in the open recess of the flat object is approximately equal to the length of its closed elongated holes.

According to a second embodiment, in conjunction with the generic term mentioned at the beginning, the object underlying the invention is achieved in that the flat object is provided on its binding edge with several recesses that open towards the binding edge and behind them on both sides with guide grooves that run parallel to the binding edge, while in both legs of the overlapping rail there are several recesses that open towards the binding edge and form a projection and that are congruent with one another, and on the inside of the ends of the legs there are guide ribs that are guided in the guide grooves of the flat object, whereby by moving the rail relative to the flat object, the recesses in the binding edge of the flat object can be opened, narrowed or closed by the projections in the recesses of the rail. In this embodiment, the guide elements of the retaining tongues in the rail and the guiding elongated holes in the flat objects have now been replaced by guide ribs in the rail and by guide grooves in the flat object, whereby the advantages of the first embodiment are fully adopted.

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According to an advantageous development of this second embodiment, stop edges are provided at both ends of the rail that protrude into the space between them and interact with the recessed ends of the binding edge of the flat object. These stop edges allow the rail to be pulled or shifted relative to the binding edge of the flat object without visual contact until the respective stop edge hits the recessed end of the binding edge of the flat object that is assigned to it and is prevented from moving further relative to it. In this way, the two stops in the rail in conjunction with the recessed ends of the binding edge in the flat object determine the fully open and fully closed position of the connection between the rail and the flat object without visual contact.

To facilitate the insertion of the ring brackets, the recesses in the flat object that are open towards the binding edge have an open V-shape that runs transversely to the binding edge, the longer leg of which runs parallel to the longer leg of the open recesses in the rail. When the rail is swung in, these legs form run-on and guide edges with the flat object held by it in order to facilitate the insertion of the ring brackets into the open recesses in the rail and the flat object. For this purpose, it is also

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It is advantageous if the open recess in the flat object, which is on top after storage, e.g. in a folder, has a geometrically similar shape to the corresponding recess in the rail, but with a shorter length of its elongated hole.

Advantageously, the rail is made of plastic or a thin tinplate, wherein the wall thickness of one leg of the rail is equal to or smaller than the wall thickness of the binding edge of the flat object to be inserted therein.

To ensure that flat objects are always held securely between the legs of the rail, the legs of the rail are spring-loaded when a flat object is inserted into the gap. This means that the flat objects are not only held in place by the form-fitting features engaging in their closed slots, but also by the legs being spring-loaded, thus providing increased frictional engagement.

Several embodiments of the invention are shown in the drawings.

Fig. 1 is a plan view of a rail with circular protrusions as holding tongues and with interposed, open towards the binding edge,

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congruent recesses in both legs forming a projection,

Fig. 2 shows the sectional view along the line II/II of Fig. 1 in an enlarged view,

Fig. 3 is a partial plan view of a flat object with several elongated holes provided on its binding edge, closed at their periphery and running parallel to the binding edge, and with several recesses arranged between them and open towards the binding edge,

Fig. 4 is a plan view of the connection of the rail of Fig. 1 with the binding edge of the flat object of Fig. 3 in the open position,

Fig. 5 the top view of Fig. 4 in the closed position of the recesses in the binding edge of the flat object,

Fig. 6 shows a second embodiment of a rail for connection to a hanging fastening strip as a flat object of Fig. 8,
25

Fig. 7 the sectional view along the line VII/VII of Fig. 6 through the rail and one of its forms as retaining tongues in an enlarged view,

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Fig. 8 the top view of a hanging binding strip as a flat object,

Fig. 9 the connection of the rail of Fig. 6 with the binding edge of the hanging binding strip of Fig. 8 in the open position of the recesses in the hanging binding strip,

Fig. 10 is a sectional view along the line X/X of Fig. 9,

Fig. 11 is a sectional view along line XI/XI of Fig. 9,

Fig. 12 the view of Fig. 9 with the recesses in the suspension strip in the closed position.

Fig. 13 a third embodiment of a rail with guide ribs and stops, 20

Fig. 14 the view of the rail of Fig. 13 in the direction of arrow XIV,

Fig. 15 the view of the binding edge of a flat object with guide grooves arranged on both sides,

Fig. 16 the view of the flat object in the direction of arrow XVI of Fig. 15,

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Fig. 17 the connection of the rail of Fig. 13 with the binding edge of the flat object of Fig. 15 in the open position of the recesses in the binding edge of the flat object,

Fig. 18 the view of the connection of Fig. 17 in the direction of arrow XVIII and

Fig. 19 the connection of Fig. 17 in the closed position of the recesses in the binding edge of the flat object.

The rail 1 according to Fig. 1 and 2 for connection to flat objects, such as plastic filing strips 2 according to Fig. 8 or sleeves 3 according to Fig. 3 to 5, is provided with several congruent recesses 4 in both legs 5, 6 (see Fig. 2) of its U-shaped cross-section, which are open towards its filing edge la and form a projection 1b. The two legs 5, 6 are connected to one another by a relatively short web 8 and have at least two spaced-apart retaining tongues 7 which are circular in plan view and which are formed alternately in both the leg 5 and the leg 6 of the rail by formations of the plastic or the metallic material.

The congruent recesses 4 in the legs 5, 6 of the rail 1 each have a parallel to the

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The rail has an elongated hole 9 running along the outer edge of the rail la with a semicircular bottom side 9a at one end of the elongated hole and two leg sides 10, 11 adjoining the other open end of the elongated hole 9b, running transversely to the outer edge of the rail la and diverging from one another. Of these leg sides 10, 11, the leg side 11 runs essentially perpendicularly or slightly inclined to the outer edge of the rail la, whereas the leg side 10 runs significantly obliquely thereto, for example at an angle α between 30° and 60°. The leg side 11 simultaneously forms the projection 1b.

Fig. 3 shows a flat object in the form of a cover 3, which is provided on its welded or glued binding edge 3a with a plurality of elongated holes 12 which are closed on their circumference and run parallel to the binding edge 3b and with a plurality of recesses 13, 14 arranged between them and open towards the binding edge 3b.

Of these recesses 13, 14, the uppermost recess 13 in the flat object 3, 2, which is opened after storage, e.g. in a folder, has a geometrically similar shape to the opened recesses 4 of the rail 1, but with a shorter length l _o of its elongated hole 15. This length l _o of the elongated hole 15 in the opened recess 13 is approximately equal to the length of its closed elongated holes 12.

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The retaining tongues 7 of the rail 1 are alternately embossed into both of its opposite legs 5, 6. These retaining tongues 7 are guided in the closed elongated holes 12 in the binding edge 3a of the flat object 3, 2 and can be moved against frictional forces, which hold the rail 1 in the respective distorted or displaced relative position against its gravity or other inertial forces. As a result, the rail 1 cannot be moved inadvertently relative to the binding edge 3a of the flat object 3 and thus undesirably adjusted from a closed to an open position.

The recesses 14 in the flat object 3, 2 located under the recess 13 and open towards the binding edge 3b have an open V-shape running transversely to the binding edge 3b, of which the longer leg side 16 runs parallel to the longer leg side 10 of the open recesses 4 in the rail 1. The second leg side runs either perpendicularly or slightly inclined to the binding edge 3b.

According to Fig. 4, the binding edge 3a of the cover 3 is a flat object and is gripped on both sides by the legs 5 (see Fig. 10 and 11) of the rail 1. The retaining tongues 7, which are arranged alternately in the legs 5, 6, engage on both sides of the binding edge 3a in the elongated holes 12 of the flat

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object 3, 2 and can be pulled or moved along a length. In the open position of Fig. 4, the leg sides 10 of the opened recesses 4 of the rail 1 run parallel to the leg sides 16 of the opened recesses 13, 14 in the binding edge 3a of the flat object 3, 2. In this position, the upper end Ic of the rail 1 protrudes by a length I ₄ beyond the upper end 3c of the binding edge 3a of the flat object 3, 2. This length I ₄ corresponds to the displacement path I ₃ of the retaining tongues 7 within the elongated holes 12.

According to Fig. 5, after it has been inserted, the upper end Ic of the rail 1 runs congruently with the upper end 3c of the binding edge 3a of the flat object 3. This causes the retaining tongues 7 of the rail 1 to be moved to the opposite end of the elongated holes 12. At the same time, the projections Ib of the opened recesses 4 of the rail 1 are moved in the direction of the leg sides 16 of the opened recesses 13, 14 in the flat object 3, whereby the openings 13, 14 in the binding edge 3a can be narrowed accordingly or even closed completely. In this case, the rail 1 together with the flat object 3 held by it - here in the form of a cover - with the documents contained therein cannot be pulled or pushed out of the remaining space. Accordingly, Fig. 5 shows the closed position of the rail 1.

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relative to the opened recesses 13, 14 in the binding edge 3a of the flat object 3.

In Fig. 6 to 12, the parts of Fig.

to 5, corresponding parts are designated with the same reference numerals. In Figs. 8 and 12, a hanging binding strip 2 is shown as a flat object, which differs from the flat object 3 in the form of the cover according to Figs. 3 to 5 by the metal rail 18 and the binding tongues 19, but not by the design of its binding edge 3a, so that this continues to be designated with this reference numeral as in Figs. 3 to 5. The binding edge 3a also has three elongated holes 12, a V-shaped recess 14 and a hook-shaped recess 13 similar to the binding edge 3a in Fig. 3. The legs 5, 6 and the leg sides 10, 11, 16, 17 of the recesses 4, 13, 14 of the rail 1 and the flat object 3 are also designated in the same way as in Figs. 1 to 3.

For this reason, the rail 1 according to Fig. 6 has two spaced-apart, open recesses 4 similar to Fig. 1, of which the upper recess 4 has a greater length of its elongated hole 9 than the lower recess 4.

The flat object 2 according to Fig. 8 in the form of a hanging binding strip is provided on its binding edge 3a with three

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provided with elongated holes 12 arranged at equal distances from one another, the longitudinal axis 12a of which extends parallel to the binding edge 3b, as in the case of the elongated holes 12 of the flat object of Fig. 3 to 5.

In addition, two open recesses 13 and 14 are arranged in the binding edge 3a of the flat object 2 of Fig. 8, of which the recess 13, as in Fig. 3, has a geometrically similar shape to the upper open recess 4 in the rail 1, but with a shorter length I ₀ of the elongated hole 15. This elongated hole 15 is also provided at one end with a closed, semicircular base side 15a and at the open elongated hole end 15b with adjoining leg sides 16, 17 which diverge from one another and run transversely to the binding edge 3b.

The second recess 14 in the flat object 2, which is open towards the binding edge 3b, has an open V-shape running transversely to the binding edge 3b, of which the longer leg 16 runs parallel to the longer leg 10 of the opened recess 4 in the rail and the other leg 17 runs either perpendicular to the binding edge 3b or slightly inclined thereto.

The connection of the rail 1 according to Fig. 6 with the flat object in the form of a hanging fastening strip according to Fig. 8 is shown in Fig. 9 with the recesses 13 and 14 open and in Fig. 12 with the recesses 13, 14 closed.

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As can be seen from Fig. 9, the rail 1 engages with its circularly embossed retaining tongues 7 in the elongated holes 12 of the flat object 2 and is pulled into its raised position therein, whereby the projections 1b release the recesses 13 and 14 into their open position, but after the rail 1 has been pulled in, according to Fig. 12, narrow such that a ring bracket (not shown) arranged in the area of the elongated hole 15 and in the bottom area of the V-shaped recess 14 can no longer slide out of the thus narrowed recesses 13 and 14 of the flat object 2. It is understood that the length I ₂ of the elongated holes 12 can be extended such that the projections Ib completely close the recesses 13 and 14.

As can be seen from Fig. 10 and 11, the wall thickness d of a leg 5, 6 of the rail 1 is equal to or smaller than the wall thickness D of the binding edge 3a of the flat object 2, 3 to be inserted. However, the engagement depth t of each spring tongue 7 extends over the entire depth of the elongated holes 12 in the flat objects 2, 3. In order to securely hold the flat objects 2, 3 on multiple sides, the retaining tongues 7 are alternately embossed into both opposite legs 5, 6 of the rail 1. When inserting a binding edge 3a of a flat object 2, 3 into the gap 20 between the legs 5, 6 -

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however, the legs 5, 6 do not have to be placed under spring preload via their web.

Furthermore, each rail 1 is advantageously provided with a label field 21 at its upper end.

In Fig. 13 to 19, a further connection and its individual parts are shown, which differs from the previously described embodiments of Fig. 1 to 12 essentially only in that the elongated holes 12 in the flat objects 2, 3 with the retaining tongues 7 of the rails 1 guided therein, described in the latter figures, are now replaced by a different guide. Otherwise, parts of the rail 1 and the binding edge 3a of the flat object 3, 2 that correspond to Fig. 1 to 12 are designated with the same reference numbers.

This guide now consists of guide ribs 5b, 6b on the inner sides 5a, 6a of the legs 5, 6 of the rail 1, which run parallel to the outer edge la of the rail. These guide ribs 5b, 6b engage in guide grooves 22, 23 on both sides of the binding edge 3a of the flat object 2, 3, which also run parallel to the binding edge 3b of the flat object 2, 3. This allows the rail 1 to be moved, e.g. warped, exactly parallel to the binding edge 3b. In order to prevent the rail 1 from being pulled out from the binding edge 3a of the flat

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In order to prevent the object 2, 3 from moving, the rail has a stop 24, 25 at each of its ends lc, ld. These stops 24, 25 interact with the recessed ends 26, 27 of the binding edge 3a of the flat object 2, 3 in such a way that in Fig. 17 the stop 25 of the rail 1 has been pulled towards the recessed end 27 of the binding edge 3a and thus the connection between the rail 1 and the binding edge 3a of the flat object 2, 3 is in an open position of the recesses 13, 14 of the binding edge 3a.

In Fig. 19, however, the upper stop 24 of the rail 1 has been pulled against the recessed end 26 of the binding edge 3a, whereby the openings 13, 14 in the binding edge 3a are narrowed or closed by the projections 1b in the rail 1.

It is understood that the displaceability of the rail 1 with its guide ribs 5b, 6b can also be achieved by limiting the length of the guide grooves 22, 23 in the binding edge 3a of the flat object 2, 3, for example in such a way that at the relevant end regions the guide grooves 22, 23 end in front of the upper and lower ends 3c, 3d of the binding edge 3a and are closed at these ends.

In contrast to Fig. 15 and 16, they do not run continuously. In this case, the

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Guide grooves 22, 23 exactly at the height of the recessed ends 26, 27 of Fig. 15, which can then also be pulled through to the upper and lower ends 3c, 3d of the binding edge. The length of the guide ribs 5b, 6b in the rail 1 is shortened accordingly.

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List of reference symbols:

Rail 1

Rail outer edge la

Advantage Ib

upper end of rail 1 Ic

lower end of rail 1 Id

Hanging binder strips 2
15

Covers 3

Binding edge of cover 3 3a

Binding edge 3b

upper end of the binding margin 3a 3c

lower end of the binding margin 3a 3d 25

Recesses 4, 13,

Leg 5,

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Inside of legs 5, 6 5a, 6a Guide ribs 5b, 6b

Retaining tongues 7

Bridge 8

Slots 9, 12,

Bottom side of the slot 9 9a

Long hole end 9b

Thigh sides

the recesses 10, 11, 16,

Longitudinal axis of the slot 12 12a

Bottom side of the slot 15 15a

Long hole end 15b

Metal rail 18 25

Staples 19

Space 20

*

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Title block 21

Guide grooves 22,

Stop edges 24,

recessed ends

of the flat object 26,

Wall thickness of the leg 5, 6 d Wall thickness of the binding edge 3a D

Lengths I ₀ , I ₁ , I ₂ , I ₃ ,

Depth of engagement of the retaining tongues 7 t

Angle &agr;

Claims (16)

1. Connection of a rail to a flat object, such as a document, a plastic filing strip, a cover or the like, with several recesses for filing in a folder, a filing device or a filing bracket, the rail having a U-shaped cross-section which encompasses the filing edge of the flat object with its two U-legs, characterized in that the flat object ( 2 , 3 ) is provided on its filing edge ( 3a ) with several elongated holes ( 12 ) which are closed on their circumference and run parallel to the filing edge edge ( 3b ) and with several recesses ( 13 , 14 ) arranged between them and open towards the filing edge edge ( 3b ), while in both legs ( 5 , 6 ) of the overlapping rail ( 1 ) there are several recesses ( 4 ) which are open towards its filing edge edge ( 1a ), form a projection ( 1b ) and are congruent with one another and at least two spaced-apart retaining tongues ( 7 ) are arranged which are guided in a form-fitting manner in the elongated holes ( 12 ) of the flat object ( 2 , 3 ), wherein by a relative displacement of the rail ( 1 ) to the flat object ( 2 , 3 ), the recesses ( 13 , 14 ) in the binding edge ( 3a ) of the flat object ( 2 , 3 ) can be opened, narrowed or closed by the projections ( 1b ) in the recesses ( 4 ) of the rail ( 1 ). 2. Connection according to claim 1, characterized in that the retaining tongues ( 7 ) in the rail ( 1 ) have a circular diameter which is slightly smaller than the leading elongated holes ( 12 ) in the binding edge ( 3a ) of the flat object ( 2 , 3 ) and are formed by protrusions ( 7 ) engaging in the space between the two legs ( 5 , 6 ) of the rail ( 1 ). 3. Connection according to claim 2, characterized in that the retaining tongues ( 7 ) are alternately embossed into both opposite legs ( 5 , 6 ) of the rail ( 1 ). 4. Connection according to one of claims 1 to 3, characterized in that the retaining tongues ( 7 ) of the rail ( 1 ) are guided in the closed elongated holes ( 12 ) in the binding edge ( 3a ) of the flat object ( 2 , 3 ) against frictional forces which hold the rail ( 1 ) in the respective relative position against its gravity. 5. Connection according to one of claims 1 to 4, characterized in that the engagement depth (t) of the retaining tongues ( 7 ) extends over the entire elongated hole depth of the flat object ( 2 , 3 ). 6. Connection of a rail to a flat object, such as a document, a plastic filing strip, a cover or the like, with several recesses for filing in a folder, a filing device or a filing bracket, the rail having a U-shaped cross-section which encompasses the filing edge of the flat object with its two U-legs, characterized in that the flat object ( 2 , 3 ) is provided on its filing edge ( 3 a) with several recesses ( 13 , 14 ) open towards the filing edge ( 3 b) and behind them on both sides with guide grooves ( 22 , 23 ) running parallel to the filing edge ( 3 b), while in both legs ( 5 , 6 ) of the overlapping rail ( 1 ) there are several recesses ( 4 ) which are open towards its filing edge ( 1 a) and form a projection ( 1 b) and which are congruent with one another, and on the inner sides ( 5 a, 6 a) of the ends of the legs ( 5 , 6 ) guide ribs ( 5 b, 6 b) are arranged, which are guided in the guide grooves ( 22 , 23 ) of the flat object ( 2 , 3 ), wherein by a relative displacement of the rail ( 1 ) to the flat object ( 2 , 3 ), the recesses ( 13 , 14 ) in the binding edge ( 3 a) of the flat object ( 2 , 3 ) can be opened, narrowed or closed by the projections ( 1 b) in the recesses ( 4 ) of the rail ( 1 ). 7. Connection according to claim 6, characterized in that stop edges ( 24 , 25 ) projecting into the space between them ( 20 ) are provided at both ends ( 1c , 1d ) of the rail ( 1 ), which interact with the recessed ends ( 26 , 27 ) of the binding edge ( 3a ) of the flat object ( 2 , 3 ). 6. Connection according to one of claims 1 to 7, characterized in that the congruent recesses ( 4 ) in the legs ( 5 , 6 ) of the rail ( 1 ) each have an elongated hole ( 9 ) running parallel to the outer edge of the rail ( 1a ) with a semicircular bottom side ( 9a ) at one end of the elongated hole and two leg sides ( 10 , 11 ) adjoining the other open end of the elongated hole ( 9b ), running transversely to the outer edge of the rail ( 1a ) and diverging from one another. 9. Connection according to claim 8, characterized in that the uppermost elongated hole ( 9 ) in the congruent recesses ( 4 ) of the rail ( 1 ) is provided with a greater length ( 11 ) than its underlying elongated holes ( 9 ). 10. Connection according to one or more of claims 1 to 9, characterized in that the recesses ( 14 ) in the flat object which are open towards the binding edge ( 3b ) have an open V-shape running transversely to the binding edge ( 3b ), of which the longer leg ( 16 ) runs parallel to the longer leg ( 10 ) of the open recesses ( 4 ) in the rail ( 1 ). 11. Connection according to one or more of claims 1 to 10, characterized in that the uppermost recess ( 13 ) in the flat object ( 3 , 2 ) which is opened after storage, e.g. in a folder, has a shape which is geometrically similar to the corresponding recess ( 4 ) in the rail ( 1 ) but with a shorter length (l _o ) of its elongated hole ( 15 ). 12. Connection according to claim 11, characterized in that the length (l _o ) of the elongated hole ( 15 ) in the opened recess ( 13 ) of the flat object ( 3 , 2 ) is approximately equal to the length ( 12 ) of its closed elongated holes ( 12 ). 13. Connection according to one or more of claims 1 to 12, characterized in that the rail ( 1 ) consists of plastic or a thin tinplate. 14. Connection according to one of claims 1 to 13, characterized in that the wall thickness (d) of a leg ( 5 , 6 ) of the rail ( 1 ) is equal to or smaller than the wall thickness (D) of the binding edge ( 3a ) of the flat object ( 2 , 3 ) to be inserted therein. 15. Connection according to one or more of claims 1 to 14, characterized in that the legs ( 5 , 6 ) of the rail ( 1 ) are placed under a spring preload when a flat object ( 2 , 3 ) is inserted into their intermediate space ( 20 ). 16. Connection according to one or more of claims 1 to 15, characterized in that the upper end ( 1c ) of the rail ( 1 ) is provided with a writing field ( 21 ).