EP0041685A1 - Process and apparatus for joining metal or synthetic spiral elements into a belt - Google Patents

Abstract

According to the invention, flat structures A such as cloths, mats or sieves or the like, which result from the joining of coils of metal wire or plastic wire, when inserting wires into the overlapping areas between the head arches in each case two nested left-hand, right-hand or co-rotating coils imported from metal or plastic, manufactured by machine. This takes place in such a way that the pre-stretched, additional second coil 2, which is inserted at an acute angle 45 to, is inserted into the already-existing first coil 1, stretched, held on a work table 11 and aligned, last added first coil 1 by means of a joining tool 42 first coil 1 emerges from a discharge channel (44) which is transported along with the joining tool 42 along the first coil 1. The insertion wire 3 is tracked to the joining tool 42. In time between a completed and a subsequent further joining process in the same or opposite direction, the flat structure A is transported further by a plug-in wire distance 5.

Description

The invention relates to a method and to devices for joining spirals made of metal wire or plastic wire to form structures such as cloths, mats, sieves or the like by means of insertion wires made of metal or plastic, which are inserted into the overlapping areas between the head arches in each case two nested left or Right-hand or co-rotating helices are introduced.

Such fabrics are used in many areas of technology. Flat structures made of helixes are preferred for use in conveyor systems, for example in drying ovens, baking ovens, candy transport devices, but also in the fish industry, in packaging machines or for the transport of all types of food.

Sheet-like structures made of plastic wire helices can preferably also be used as conveyor belts at normal temperatures, for example in papermaking, preferably as a replacement for expensive felt conveyor belts. Sheets of the type mentioned can also be used as filter mats or sieves.

The dimensions of such fabrics vary and depend on the respective type of use. While rather narrow belts are required for filter mats or sieves or the like conveyor belts for paper production can reach widths of up to 10 meters or more.

So far, such fabrics have been produced by hand in a complex manner. The finished fabric, which falls behind the work table into a storage container or simply on the floor, lies partially on a work table corresponding to the width of the fabric. On the last existing helix of the, for example, 8 meter wide fabric, the last helix attached is fastened by means of an insertion wire which is inserted into the overlap area of both interpenetrating helices. This last helix added is stretched so far that the second helix that is added can easily be inserted into its gaps. Immediately after joining, the insertion wire is usually inserted by a second person.

If, in the foreseeable future, the people involved in this manufacture also acquire a certain dexterity, overall, however, this form of manufacture of flat structures of the type mentioned is complex, costly and, above all, time-consuming. Large conveyor belts, such as those in the paper industry, cannot be quickly manufactured to order if a conveyor belt in a paper manufacturing machine has failed. In order not to leave such an extraordinarily expensive paper machine idle for an unacceptably long time, at least one reserve conveyor belt must always be in stock.

In order to avoid annoying tension spring-like prestresses in the flat structures described, which the coils have after they have been joined into one another, it has been proposed to use torsion-free coils and to thermally fix the flat structure, for example a screen belt, in a stretched state after insertion of the plug-in wire. In addition, spirals with widened winding arcs are used, one of which is used before joining two sets that they are laterally offset one above the other. Then you stretch the coils a little in length and then pass them between two press rolls, whereby they are pressed together. The widened winding arcs hold the joined coils together after the tension applied to them has been released so that the plug wire can be inserted (DE-OS 2 938 221).

If the manufacture of such flat structures can be made slightly easier with this, the operations must nevertheless be carried out by hand. The resulting personnel and time expenditure with all disadvantages remains.

The present invention has for its object to remedy this situation and to provide a joining method and a joining device working thereafter, with which the manufacture of such flat structures of any width can be significantly accelerated and, above all, automated, with exact compliance with the respective pitches of the helices.

It has been found that this can be achieved in a simple manner by the pre-stretched, additional second coil emerging from a discharge channel in the already stretched first coil, which has already been joined with an existing coil, held on a work table and aligned, and is aligned - Together with the joining tool - is transported along the first helix, so that the insertion wire is guided to the joining tool, and that the sheet is transported further by a insertion wire distance between a completed and a subsequent further joining process in the same or opposite direction.

Through the translational movement of the joining tool in connection with its mode of operation and the resulting exit The addition of the pre-stretched second helix at an acute angle to the first helix ensures that not only a relatively simple joining tool is used, but that the joining can also be carried out purely by machine with a joining speed previously not considered possible.

As a result of the clever training options for the joining tool, the insertion wire can also be adjusted quickly and easily.

In time between a completed and a subsequent further joining process in the same or opposite direction, not only is the fabric conveyed further by a plug-in wire distance, but also the necessary switching of the joining device is carried out. It is particularly advantageous that the joining process can be implemented by joining devices that work pneumatically. Without changing anything at the core of the invention, however, the pneumatically triggerable operations can also be triggered electromagnetically, electromechanically or mechanically. The joining method according to the invention allows, for example, a joining tool to be guided in a to-and-fro direction relative to the work table or, for example, to be pulled around the work table by a chain or cable drive. With this type of practice of the method, fabrics can be joined on both long sides of the work table.

In order to achieve full utilization of the joining options, in a further development of the invention, a joining tool for joining during back and forth transport is combined with two oppositely inclined discharge channels, from each of which a left-handed or a right-handed helix is ejected.

The fact that the additional spiral is inserted into a spiral already inserted in the existing flat structure is the latter always stretched out in the right way. If a new machine for the production of fabrics of the type in question is to be newly set up, a first helix must be stretched out on the work table with the correct extension. Only for setting up the joining device working according to the method according to the invention is it necessary to join the beginning of a flat structure by hand.

According to a further inventive idea, it is provided that the beginning of each additional second helix is recorded at the beginning of a joining cycle at the end of the respective first helix, and that the transport speed of the joining tool and the feeding speed of the respective second helix are coordinated with one another in such a way that they are coordinated the necessary stretch of the second coil results.

The flattening of the coils or the edge fastenings on the fabric are carried out in further process steps, which, however, are not part of the present invention.

To carry out the method, the joining device is characterized in that the joining tool and the discharge channel (s) are provided on a joining carriage which can be transported back and forth above the work table in such a way that the distance between the lower area of the joining tool and one on the work table arranged joining edge or a joining table is slightly smaller than the diameter of the helix, that at least one supply roll and a wire insertion device for the insertion wire are arranged on the work table and that a transport device with a lower pneumatically actuated transport piece and an upper counter-holder is used to transport the fabric by an insertion wire distance is provided. In this way, a secure insertion of the additional second helix is achieved even in the manufacture of sheets of any width and perfect automatic operation of the device. Further exemplary embodiments and details of the invention with regard to the simultaneous joining of several flat structures can be found in claims 5 and 6.

It should be emphasized that storage containers for the second coils to be fed are arranged on the joining slide. These storage containers, which are large enough to hold spirals for several joining cycles, are always carried along.

Each of these storage containers is connected via a feed channel and deflection or pressure rollers to the discharge channel emerging from the lower edge of the guide carriage at an acute angle.

In one embodiment of the invention, the feed channels in a working wall of the joining slide are guided on both sides around the joining tool and the discharge channels are brought together below the joining tool on the lower edge of the joining carriage.

This results in an extraordinarily simple construction of the joining slide.

Each feed channel is provided with a preferably pneumatically actuated cutting device, the distance of which from the opening of the associated discharge channel corresponds to the length of the upper run of the working stroke. The end of the additional second helix still runs out of the discharge channel after the cutting process. During this time the joining slide executes its upper stroke. When returning from this overstroke to the point at which a new joining process begins, the beginning of the further helix now to be made available for the joining process runs from the cutting device to the discharge opening of the discharge channel and is available at the beginning of the joining process without any special aids.

It is advantageous in one exemplary embodiment that the joining tool is a joining wheel which is rotatably seated on a drive shaft in such a way that its lateral surface, which is designed as a joining edge, projects into the common exit region of the two discharge channels. According to subclaims 12-14, the lateral surface of the joining wheel can be designed differently.

According to the invention, it is possible to carry out the transport of the joining slide equipped with one or two joining tools in the back-and-forth operation and in all-round operation in a manner known per se. However, it has been found that it is advantageous to provide a toothed rack for the transport of the joining slide, which is fastened below the bottom of the joining slide on a carrier between parallel sliding bars on the worktop of the worktable, and into which a drive gear driven by a drive motor on Intervening slide. This drive motor drives both the joining wheel and the gear wheel. Since the drive motor can be regulated, the speed of advance of the joining slide and the rotation of the joining wheel are always precisely coordinated.

At least one supply roll and a wire insertion device for the insertion wire are arranged on the work table of the joining device. During back and forth operation, a wire insertion device with a supply roll for the insertion wire is arranged at each end of the work table. The wire guide and the insertion device can be adjusted, preferably adjusted, at the work table in the area of the overflows.

In order to ensure that the insertion wire is inserted into the overlap areas, an ultrasonic oscillator can be provided, by means of which the insertion wire can be set into high-frequency vibrations before it is inserted into the overlap area.

After the ultrasonic transducer, the insertion wire is passed through a hole knife which - preferably pneumatically - cuts the insertion wire to the correct length.

A secure joining and a proper insertion of the insertion wire into the overlap area is also essentially achieved in that a device extending over the entire width of the worktable is provided for holding and aligning the coils lying on the joining bench or on the joining table.

In a first exemplary embodiment, a straightening knife extending over the entire length of the work table is provided for holding and aligning the coils. If the working table is particularly wide, one straightening knife can also be replaced by smaller straightening knives placed side by side.

The straightening knife (s) are guided perpendicular to the work table and are thereby under the influence of springs which press the cutting edges of the straightening knives onto the overlap area of the respective existing helix and the last helix inserted last. Normally, the straightening knives are raised against the force of the springs due to their resilient mounting when transporting the fabric. In a special exemplary embodiment, however, the straightening knives can also be connected to a pneumatic lifting drive, which raises the straightening knives when the flat structure is transported on by a plug-in wire distance.

When using straightening knives, a transport device with a lower pneumatically actuated transport piece and an upper counter-holder is provided for transporting the flat structure by a plug-in wire distance. Details of this transport device are characterized in the subclaims 29-32.

In a further exemplary embodiment of the invention, a pneumatically driven, resilient pin header device which extends over the entire width of the work table is provided for aligning, holding and transporting the flat structure during and after a joining operation.

Instead of the joining wheel, a trailing wheel arranged at the end of a resilient arm can also be used as the joining tool, which can be designed in detail according to subclaims 37 and 38.

Exemplary embodiments of the invention are explained below with reference to the drawing:

• Figur 1 eine Draufsicht auf den Ausschnitt aus einem Flächengebilde,
• Figur 2 eine vereinfachte Seitenansicht auf die Wendeln des Flächengebildes nach Fig. 1,
• Figur 3, 3a eine schematische Darstellung des Fügevorganges,
• Figur 4 eine Ansicht auf die Fügeschlitten-Seite der Fügevorrichtung,
• Figur 5 ein Fügewerkzeug,
• Figur 6 einen Querschnitt entlang der Linie VI VI nach Fig. 4,
• Figur 7 Einzelheiten einer Halte- und Transportvorrichtung für das Flächengebilde,
• Figur 8 Einzelheiten eines anderen Ausführungsbeispiels einer Halte- und Transportvorrichtung,
• Figur 9 eine Ansicht in Richtung A auf die Halte- und Transportvorrichtung nach Fig. 8,
• Figur 10 eine Drahteinsteckvorrichtung,
• Figur 11 einen Schnitt entlang der Linie A B in Fig. 10 u.
• Figur 12 Mantelflächen des Fügewerkzeuges.
• Figur 1 zeigt zur Erläuterung eine Draufsicht auf den Ausschnitt aus einem Flächengebilde A, welches mit der erfindungsgemäßen Fügevorrichtung hergestellt wird. Das Flächengebilde A besteht in seinem fertigen Zustand aus einer mehr oder weniger großen Zahl von Wendeln aus Metalldraht bzw. Kunststoffdraht, die mittels Einsteckdrähten aus Metall bzw. Kunststoff zusammengehalten werden. Zwei nebeneinanderliegende Wendeln sind in Fig. 1 mit 1 und 2 bezeichnet. Im weiteren Verlauf der Beschreibung wird von einer vorhandenen Wendel 0 ausgegangen, die durch einen Einsteckdraht 3 fest mit dem Flächengebilde A verbunden ist. Figur 3 deutet dieses schematisch an. An die vorhandene Wendel 0 ist die sogenannte zuletzt angefügte erste Wendel 1 angefügt, die mit der vorhandenen Wendel 0 durch den Einsteckdraht 3 verbunden ist.

It shows

• FIG. 1 shows a plan view of the detail from a flat structure,
• FIG. 2 shows a simplified side view of the coils of the flat structure according to FIG. 1,
• 3, 3a a schematic representation of the joining process,
• FIG. 4 shows a view of the joining slide side of the joining device,
• FIG. 5 a joining tool,
• 6 shows a cross section along the line VI VI of FIG. 4,
• FIG. 7 details of a holding and transport device for the flat structure,
• FIG. 8 details of another exemplary embodiment of a holding and transport device,
• FIG. 9 shows a view in direction A of the holding and transport device according to FIG. 8,
• FIG. 10 shows a wire insertion device,
• Figure 11 is a section along the line AB in Fig. 10 u.
• Figure 12 lateral surfaces of the joining tool.
• FIG. 1 shows a plan view of the detail from a flat structure A, which is produced with the joining device according to the invention. The flat structure A consists in its finished state of a more or less large number of coils made of metal wire or plastic wire, which are held together by means of metal or plastic insert wires. Two coils lying side by side are designated by 1 and 2 in FIG. 1. In the further course of the description, an existing helix 0 is assumed, which is firmly connected to the flat structure A by an insertion wire 3. Figure 3 indicates this schematically. The so-called last-added first coil 1 is attached to the existing coil 0 and is connected to the existing coil 0 by the insertion wire 3.

According to FIG. 3, the opposite side of the first coil 1 added last is open. It can clearly be seen that the helix 1 is so tensioned by the existing helix 0 that the individual turns of the helices form gaps into which the turns of the additional second helix 2 can easily be inserted.

FIG. 3 shows a joining tool 42 and a joining bench 13 to demonstrate the mode of operation of the new joining device. The directional arrow of the translatory movement is shown above the joining tool, which is designed as a joining wheel 42 in the exemplary embodiment shown. The arrow indicates the direction of rotation of the wheel within the joining wheel 42. It can be clearly seen that the helix 2 to be added is inserted into the first helix 1 by the joining tool. Here, the insertion wire 3 is tracked to the joining tool. The insertion wire 3, as can be seen in FIG. 2, is inserted into the overlap area 4 between the two head bows 1a and 2a of the coils 1 and 2. FIG. 2 also shows the so-called insertion-wire distance 5 by which the flat structure A according to FIG. 3 after the joining process in the direction of three arrows pointing downward is transported. It is important that the additional second helix 2 is inserted into the helix 1 by the joining tool 42 at an acute angle 45 to the helix 1. In the practical implementation, the additional helix 2 emerges from an outlet channel, not shown in FIG. 3, in which it has not yet been stretched.

The helix to be joined can, as shown primarily in FIGS. 1 and 3, alternate left and right-handed. Without changing anything at the core of the invention, coils of the same kind can also be joined together with the invention.

In the practical implementation of the joining method indicated in FIG. 3, the joining tool, in the exemplary embodiment shown the joining wheel 42, is connected to the device in such a way that it can be transported back and forth for joining. In this case, two inclined discharge channels are combined with the joining wheel 42.

So that the additional coil 2 receives the necessary stretch so that its rings can be easily inserted into the spaces between the rings of the coil 1, the beginning of the respectively added second coil 2 is recorded at the beginning of a joining cycle from the end of the first coil. This is done in a simple manner in that the initial turns of the helix 2 are inserted into the spaces between the turns of the helix 1. The transport speed of the joining tool 42 and the feeding speed of the second helix in each case are coordinated with one another according to the invention during the joining process in such a way that the necessary extension of the helix 2 to be added automatically results as a result of holding the helix beginning (FIG. 3).

FIG. 4 shows a view of the joining device according to the invention from the joining slide side. A work table 11 with legs 14 and stiffeners 15 is constructed on a floor 10, which in the exemplary embodiment shown has a work table top 12 and a joining bench 13 arranged thereon. A joining slide 16 can be moved back and forth according to the direction arrow 17 by means of sliding feet 18 on slide rods 19 from a drive motor 20 over the entire width of the work table. The working stroke of the joining slide 16 is practically as long as the stiffening bridge 25. A left overflow 30 and a right overflow 31 are provided in front of and behind this stiffening bridge 25, the meaning of which will be explained later.

A left helix storage container 21 and a right storage container 22 are arranged on the joining slide 16, in which the helices to be supplied are arranged. At least one switch 23 is arranged on the joining slide 16 itself and can be switched by adjustable triggers 24.

On the right side of the bridge 25, straightening knives 26 are shown, which ensure that the flat structure A is held firmly during a joining process. Instead of straightening knives 26, pin headers 121, 126 can also be used. In the upper run areas 30 and 31, wire insertion devices 29 are provided, each of which has a supply roll 28 for the insertion wire 3 and a transport device for the insertion wire 3 which will be explained later.

In the illustrated embodiment according to FIG. 4, the joining device is operated pneumatically. A pneumatic distributor 32 is therefore provided, to which compressed air is supplied via an input nipple, which is then guided via connection nipples 34 via fixed or flexible lines to the individual pneumatic switching functions.

It goes without saying that FIG. 4 shows only one possible embodiment of a joining device according to the invention. Depending on the width of the sheet-like structures to be joined, the joining device can also be designed differently. In principle, however, each joining device according to the invention has a joining slide 16, straightening knife 26 or pin headers 121, 126 and wire insertion devices 29. In addition, however, there is also a transport device (not shown in FIG. 4) for the flat structure A. This is carried away in a device according to FIG. 4 on the side opposite the joining slide 16.

Figure 5 shows, partly in section, the embodiment of a joining tool. The joining device is indicated by the worktop 12, on which the joining bench 13 is fastened, on which the first helix 1 and the second helix 2 added last can be seen. The insertion wire 3 is indicated on the left half of FIG. 4.

The joining tool is transported together with the joining slide 16 in the direction of arrow 40.

A joining wheel 42 is embedded in a working wall 41, around which an annular gap 43 is provided. Figure 6 shows this arrangement in cross section. FIG. 6 also shows that the joining wheel 42 is connected to a drive shaft 69 which is coupled to the drive motor 20 via a coupling 72.

The work wall 41 has a right discharge channel 44 and a left discharge channel 46. Both discharge channels are arranged at an acute angle 45 and 47 to the joining bench 13. The lower openings of the discharge channels 44 and 46 end below the joining wheel 42, the lower region of which forms a distance 60 from the upper surface of the joining edge 13. Feed ducts 48 and 59, in which blocking knives 49 are provided, adjoin the discharge ducts 44 and 46.

The blocking knives 49 sit in the mutually merging feed channels 48, 59 and discharge channels 44, 46, which are guided around the joining tool 42 on both sides and are incorporated into the working wall 41 of the joining carriage 16. The distance between each cutting device 49, 53 from the opening of the associated discharge passage 44, 46 at the lower edge of the Fügeschlit _- least 16 corresponds to the length of the respective overflow 30 and 31 of the working stroke. The respective locking knife 49 of each cutting device is driven by a pneumatic working cylinder 50 which is adjustably arranged in the working wall 41 of the joining slide 16. Each pneumatic drive cylinder 50 is operatively connected to the locking knife 49 via an intermediate rod 51. Each locking knife has a cutting edge and a surface receding from it, in relation to which a free space 52 is created in the worktop 41, which prevents the end of the outgoing helix 2 from jamming. The locking knife 49 is opposite a counter cutting edge 53, which is fastened to the working wall 41 by means of an adjusting screw 54. The shear bar 53 also has a free space 55, through which jamming of the beginning of the helix remaining in the feed channel 48 or 59 is prevented.

Pressure rollers 56 are arranged on bends of the feed channels 48 and 59, which are operatively connected to pneumatic pressure cylinders 58 via a roller holder 57.

The blocking knife 49 of one feed channel 48 or 59 and the pressure roller 56 of the other feed channel 48 or 59 can be actuated alternately. By moving the pressure roller 56 to the helix 2, its conveyance can be accomplished. In a special exemplary embodiment, the pressure roller 56 can also be driven by the drive motor of the joining wheel 42 or the like if necessary.

How this can be seen particularly in FIG. 6 is the joining wheel 42 rotatably arranged on a drive shaft 69 so that its surface 42a formed as a joining edge protrudes into the common exit area of both discharge channels 44, 46 and maintains a distance 60 there from the surface of the joining bench 13 which is smaller than the diameter of a helix.

It can be seen from FIG. 12 that the lateral surface 42a of the joining wheel 42 can be smooth, arched towards the drive shaft 69, or can be fissured or formed with teeth or spikes. The joining wheel 42 can also be exchangeably seated on the shaft 69 in order to be able to use the optimal lateral surface 42a when joining flat structures A.

According to FIG. 6, the worktop 12 is secured against bending by longitudinal beams 12a. It can clearly be seen that the joining slide 16 is movably mounted in front of the joining bench 13 by means of sliding feet 18 on sliding rods 19 which are seated on supports 65 which in turn are fastened on the worktop 12.

Between the slide rods 19, a rack 66 can be seen, which sits on a carrier 67 and which interacts with a drive gear 68, which is fastened on the drive shaft 69. The drive shaft 69 is connected to the drive motor 20 via a coupling 72. The drive motor 20 is normally an electric motor, the speed of which can be regulated. This sensible arrangement ensures that the propulsion of the joining carriage 16 is always in a direct, fixed relationship with the speed of the joining wheel 42. As a result, the joining wheel 42 has the correct, suitable joining speed for every joining speed.

The drive shaft 69 is mounted in an intermediate bearing 70 and a bearing 71.

Figure 6 clearly shows in cross section the design of the working wall 41 and the joining wheel 42 with its joining edge 42a and the recognize the annular gap 43 surrounding the joining wheel. The joining slide is completed by a rear wall 73 and a floor 74. Switches 23, which interact with the adjustable triggers 24, are located below the drive motor 20 on the underside of the base 74. The switches 23 trigger electrical or possibly pneumatic processes.

The helix 2 is initially seated in the helix storage container 21. The helix is fed to the feed channels 48 and 59 via a helix feed 75 and an auxiliary roller 75a.

In the right half of FIG. 6, the flat structure A is shown with the existing spiral 0, the last added first spiral 1 and the second spiral 2 added. FIG. 6 also clearly shows a straightening knife 26 which is resiliently arranged on the bridge 25 with the aid of a holder 76, a slide rod 77 and slide bushings 78 and 79. Following the force of a spring 80, the straightening knife 26 is pressed above the overlapping area 4 onto the two coiled helices 0 and 1. The directional arrow 81 indicates how the directional knife 26 is movable. Depending on the design of the spring 80, the straightening knife 26 can automatically deflect upwards when the sheet A is fed or subsequently penetrate again into the recess between two helices inserted into one another or can be raised by a pneumatic lifting device (not shown) during the transport step of the sheet A after a joining cycle has ended or lowered.

The transport of the flat structure A is accomplished by a transport device 90, which has a lower, pneumatically operated transport piece 91 and an upper counter-holder 92. The lower transport piece 91 can be actuated not only pneumatically, but also electrically or electromechanically.

Details of the transport device 90 can be seen in FIG. 7. On the assembly bench attached to the worktop 12 the existing helix 0, the helix 1 last added and the helix 2 that is added can be seen, which are combined to form a flat structure A. The position of the straightening knife 26 between adjacent coils can be clearly seen.

The lower transport piece 91 of the transport device 90 sits behind an intermediate plate 93 adjoining the joining bench 13 and in front of a run-off plate 94 for the flat structure A. The pneumatically actuated transport piece 91 has a transport surface 95 which is opposite a pressure surface 108 of the counter-holder 107. The transport piece 91 is connected via a rod 97 to a drive cylinder 98, which can convey the upward and downward movement according to arrow 99 to the transport piece 91. The drive cylinder 98 is seated on a slide 100 which can slide on a slide rod 101 which is mounted in holes 102 in the joining bench 13 and 104 of the rear wall 103. The lateral back and forth movement of the slider 100 is effected by a drive cylinder 105 which is pneumatically switchable. The reciprocating movement of the slider 101 can be limited or adjusted by means of a limiting screw 106.

The counter-holder 107 with its pressure surface 108 is connected to a slider 109 which is slidably mounted on a slide rod 110. A limiting piece 112 is provided on one side of the sliding piece 109 and a spring 111 is provided on the other side. The slide rod 110 is mounted in holders 113 and 114 below the bridge 25.

By means of triggers which can be triggered by the joining slide, the drive cylinders 98 and 105 can be actuated so that they are coordinated with one another in such a way that the transport surface 95 in conjunction with the pressure surface 108 succeeds in further transporting the flat structure A by a plug wire distance after the joining process has ended.

In the exemplary embodiment described so far, the transport device 90 must be provided in order to hold the flat structure A on the joining bench 13 or one or more straightening knives 26 and to transport the flat structure A by one plug wire distance in each case. In the case of narrower joining devices, the multi-mounted slide pieces 91 and 109 can extend over the entire width of the work table. In the case of wide work tables, on the other hand, several sliders are provided distributed across the width of the work table, which are pneumatically or electrically operatively connected to one another in order to achieve a uniform transport of the flat structure A after a completed joining process.

FIGS. 8 and 9 show details of a combined holding and transport device for the flat structure A. On a joining table 13a, which is designed differently than the joining bench 13, the flat structure is shown, which on the left side has the existing helix 0, the last one added has first coil 1 and the additional second coil 2. The insertion wires 3 are - as explained - indicated in the overlap areas. After a completed joining process the sheet A to a Einsteckdraht is _- distance 5 conveyed further (shown in FIG 8 to the right). The combined holding and transport device essentially consists of the two pin strips 121 and 126, to which locking transport pins 120, 125 are attached.

Figure 9 shows the pin header 121 in the direction of arrow A. Steel pins are used as pins 120 and 125, which are used in lead. The pins have a pin spacing of 128.

Top, the width of the joining table 13a away are pin headers 121, 126 provided side by side, so that it is ensured that the sheet A to a Fügevor evenly _- gang-distance Einsteckdraht 5 can be further transported to the.

In the exemplary embodiment shown, the pin headers 121, 126 are connected to drive eccentrics 124 via connecting rod connections 122 and 127, respectively. One of these drive eccentrics is connected to the connecting rod connection 122 via a connecting rod 123. For the sake of simplicity, this connection from the connecting rod connection 127 is not shown in detail.

The to and fro movement of the pin headers 121 and 126 is carried out by the eccentrics 124, whereas the up and down movement can be carried out by mechanical guidance or pneumatically. For the sake of simplicity, these guides are only indicated schematically.

Arrows for identifying the movement sequences are indicated on the pin headers 121 and 126, and the arrowheads have numerals. With the help of these markings, the following scheme results for a movement sequence:

It is to be understood that the movements of the pin connectors 121 and 126 of the joining carriage are coordinated with den_Bewegungen _°. This coordination can be done by an electronic switching arrangement, but also by pneumatic switches that can be actuated by the joining slide.

FIG. 10 shows details of a wire insertion device 29, which is arranged below the worktop 12 and the joining bench 13 or the joining table 13a fastened thereon.

The insertion wire 3 is initially located on a storage drum (not shown) (see item 28 in FIG. 4) and passes via the wire guide 131 into the overlap area between two adjacent helices, of which only the helix 2 is shown. The wire insertion device 29, which is shown in detail in FIG. 10, is, for example, the one that is shown on the right side in FIG. 4. A wire guide 131 can be guided into the working position 132 indicated by dashed lines. Here, the wire that emerges from an outlet opening 130 passes through a wire insertion opening 133 of a hole knife 135 to the left as far as FIG. 10 that the tip of the insertion wire is guided to the beginning of the overlap area.

In order to be able to accomplish this back and forth movement of the wire insertion opening, it is mounted below the worktop 12 on a slide rod 141 by means of slide feet 142.

The perforated knife 135 is under the action of a pneumatic drive cylinder 138, by means of which it can be moved up and down in accordance with the directional arrow 139.

In order to ensure a safe, trouble-free insertion of the insertion wire 3 into the overlap area 4, which is often quite long, an ultrasonic oscillator 134 can be provided in a special exemplary embodiment, which sets the insertion wire 3 in ultra-high vibrations during the insertion process, which considerably simplifies the insertion.

The wire transport device 140, which is movably arranged on the slide rod 141 with the sliding feet 142, is connected to a pneumatic drive cylinder 143 which, according to the directional arrow 144, can effect a back and forth movement of the wire transport device 140 on command.

The transport device itself has a drive belt 145, which is guided over a drive roller 146 and a roller 147. The drive roller is operatively connected to a motor 148, the speed of which is adjustable.

A counter-pressure belt 149 is arranged opposite the drive belt 145, which runs on rollers 150 which are connected via guide rods 151 to a bearing plate 152, which in turn is operatively connected to a pneumatic pressure cylinder 143.

Details of the wire transport device 140 can be found in FIG. 11, which represents a sectional view along the line A B in FIG. 10. Below the work table top 12, slide bars 142 can be seen, on which the wire transport device 140 is slidably arranged by means of the slide feet 142. The sliding feet 142 are connected to an upper wall 155 of the wire transport device. It has a front wall 156 and a middle wall 157 and a rear wall 158. A bearing shaft 160 is supported in bearings 159 in the front wall 156 and the middle wall 157, and the roller 147 is seated at the left end thereof.

A drive shaft 162 is guided through bearings 161 and connected to the drive roller 146. The drive shaft 162 is operatively connected to the motor 159 via a coupling 163.

The insertion wire 3 is withdrawn from the supply roll and introduced via a wire feed opening 164 into the space between the advance belt 145 and the counter-pressure belt 149. This is pressed by the pneumatic pressure cylinder 153 against the advance belt 145 in such a way that the insertion wire 3 is guided through the wire guide 131, 132 at the desired speed. The wire passes through a worktop 165 through the worktop 12.

The individual circuits within the joining device can be controlled pneumatically, electromagnetically or mechanically to be triggered. The exemplary embodiments explained above are driven pneumatically.

Without changing anything at the core of the invention, a joining slide 16 can be designed with two opposing joining tools 42 for joining two flat structures A during one operation. To the knowledge of the invention, any person skilled in the art will be able to extend the device shown and described for insertion devices to a second joining tool without inventive step.

Instead of transporting the joining slide back and forth in front of the joining bench or in front of the joining table, the joining carriage can also be guided around the work table. In this embodiment of the device according to the invention, a joining process would take place on each side of the work table. The modifications to the described joining device that are necessary for this need not be explained in detail.

Instead of the joining wheel 42, other joining tools can also be used, for example those joining tools which are designed as trailing wheels 42a arranged at the end of a resilient arm 42b, 42c. Advantageously, two drag wheels 42a, each arranged on a resilient arm 42b, are provided between the opposite ends of the discharge channels in the joint slide. The tread of the towing wheels is advantageously designed like the tread of the joining wheel 42.

The mode of operation of the combined locking and transport device has already been explained in connection with FIGS. 8 and 9. A further explanation of the mode of operation is not necessary, since this easily results from the claims, the figures and the description of the figures.

FIG. 12 shows, schematically indicated, exemplary embodiments of a running surface 42a of a joining tool.

Claims (40)

1.Procedure for joining spirals made of metal wire or plastic wire to form structures such as cloths, mats, sieves or the like by means of insertion wires made of metal or plastic, which are inserted into the overlapping areas between the head arches of each of two nested left-handed, right-handed or identical spirals , characterized in that the previously added first helix (1), which has already been joined together with an existing helix (0), stretched, held on a work table (11) and aligned and aligned, by means of a joining tool (42, 42a-c) (2) is inserted, which exits at an acute angle (45, 47) to the first coil (1) from a discharge channel (44, 46) which is transported along with the joining tool (42) along the first coil (1) that the insertion wire (3) is guided to the joining tool (42), and that the time between a completed and a subsequent further joining e process in the same or opposite direction, the fabric (A) is transported further by a plug-in wire distance (5). 2. The method according to claim 1, characterized in that a joining tool (42) for joining together back and forth transport is combined with two oppositely inclined discharge channels (44, 46), from each of which a left-handed and a right-handed helix (1, 2) is ejected. 3. The method according to claims 1 and 2, characterized in that the beginning of each additional second helix (2) is recorded at the beginning of a joining cycle from the end of the first helix (1), and that the transport speed of the joining tool (42) and the feed speed of the respective second helix (2) are matched to one another in such a way that the necessary extension of the respective second helix (2) results. 4. Joining device for performing the method according to claims 1-3, characterized in that the joining tool (42) and the one or more discharge channels (44, 46) are provided on a joining slide (16) which is above the work table and it can be transported here that the distance (60) between the lower region of the joining tool (42) and a joining bench (13) or a joining table (13a) arranged on the work table (11) is somewhat smaller than the diameter of the helix (1, 2) that at least one supply roll (28) and a wire insertion device (29) for the insertion wire (3) are arranged on the work table (11) and that a transport device (90) is included to transport the fabric (A) by an insertion wire distance (5) a lower pneumatically actuated transport piece (91) and an upper counter-holder (92) is provided. 5. Joining device for performing the method according to claims 1-3, characterized in that two opposing joining tools (42) with associated discharge channels (44, 46) for joining two flat structures A during one operation on a joining slide (16) can be seen, which can be transported back and forth above two work tables (11) over the entire width of these work tables in such a way that the distance (60) between the lower region of the joining tools (42) and a joining bench arranged on the associated work table (11) (13) or a joining table (13a) is slightly smaller than the diameter of the helix (1, 2) that at least one supply roll (28) and a wire insertion device (29) for the insertion wire (3) are arranged on each work table (11) and that a transport device (90) with a lower pneumatically actuated transport piece (91) and an upper counter-holder (92) are provided for transporting the flat structures (A) by an insertion wire distance (5). 6. Joining device for performing the method according to claims 1-3, characterized in that the joining tool (42) and the discharge channel or channels (44; 46) are provided on a joining slide (16) that at least two joining carriages (16) are arranged on an endless chain belt which runs around the work table, so that the joining slides (16) can be transported above the working table (11) in such a way that the distance (60) between the lower region of each joining tool (42) and at least one the workbench (13) or at least one joining table (13a) is slightly smaller than the diameter of the helix (1, 2) that on the working table (11) at least one supply roll (28) and a wire insertion device (29) are arranged for the insertion wire (3) and that for transporting each fabric (A) by a insertion wire distance (5) each have a transport device (90) with a lower pneumatically actuated transport piece (91) and an upper counter-holder (92) is provided. 7. Joining device according to claims 4-6, characterized in that on the joining slide (16) storage containers (21, 22) for the second coils (2) to be supplied are arranged. 8. Joining device according to claims 4-7, characterized in that each reservoir (21, 22) via a feed channel (48, 59) and deflection or pressure rollers (56) with the at an acute angle (45, 47) from the lower edge of the joining slide (16) emerging discharge channel (44, 46) is connected. 9. Joining device according to claims 4-8, characterized in that the feed channels (48, 59) in a working wall (41) of the joining carriage (16) on both sides around the joining tool (42) and the discharge channels (44, 46) below the Joining tool (42) are brought together at the lower edge of the joining carriage (16). 10. Joining device according to claims 4-9, characterized in that each feed channel (48, 59) is provided with a cutting device (49, 53) whose distance from the opening of the associated discharge channel (44, 46) the length of the overflow ( 30, 31) of the working stroke. 11. Joining device according to claims 4 - 10, characterized in that the joining tool is a joining wheel (42) which is rotatably seated on a drive shaft (69) in such a way that its lateral surface (42a) designed as a joining edge is in the common exit area of both discharge channels ( 42, 46) protrudes. 12. Joining device according to claim 11, characterized in that the lateral surface (42 a) of the joining wheel (42) is smooth. 13. Joining device according to claim 11, characterized in that the lateral surface (42 a) of the joining wheel (42) is arched towards the drive shaft (69). 14. Joining device according to claim 11, characterized in that the outer surface (42a) of the joining wheel (42) is fissured or provided with spikes or teeth. 15. Joining device according to claims 4 and 5, characterized by a rack (66) below the bottom (74) of the joining slide (16) on a support (67) between parallel sliding bars (19) on the worktop (12) of the Work table (11) is fixed and in which a drive gear (68) driven by a drive motor (20) engages on the joining slide (16). 16. Joining device according to claims 8 and 10, characterized in that the locking knife (49) of one feed channel (48, 59) and the pressure roller (56) of the other feed channel '(59, 48) can be actuated alternately. 17. Joining device according to claims 4-6, characterized in that the supply roll (28) and insertion device (29) on the work table (11) in the region of the upper runners (30, 31) are adjustable. 18. Joining device according to claim 17, characterized in that for inserting the insertion wire (3) in the overlap region (4) of the last inserted first coil (1) and the additional second coil (2) a precisely positionable wire guide (31) is provided. 19. Joining device according to claims 17 and 18, characterized by an ultrasonic vibrator (134) through which the insertion wire (3) can be set into high-frequency vibrations before it is inserted into the overlap region (4). 20. Joining device according to claims 17 - 19, characterized in that the ultrasonic vibrator (134) sits at the output of the longitudinally adjustable wire guide (131, 132). 21. Joining device according to claims 17 - 20, characterized by a wire insertion opening (133) which is part of a hole knife (135). 22. Joining device according to claims 17-21, characterized by a wire transport device (140) with a drive belt (145) driven by a motor (148) and a counter-pressure belt (149) mounted on rollers (150) between which the insertion wire (3) is passed through. 23. Joining device according to claims 4-6, characterized in that for holding and aligning the coils (A, 0, 1) lying on the joining bench (13) or on the joining table (13a) over the entire width of the work table (11) reaching device (26; 120, 125) is provided. 24. Joining device according to claim 23, characterized in that a holding knife is provided over the entire length of the work table (11) for holding and aligning the helix (A, 0, 1). 25. Joining device according to claim 23, characterized in that for holding and aligning the helix (A, 0, 1) are provided over the entire length of the work table (11) side by side straightening knife (26). 26. Joining device according to claims 23 25, characterized in that the straightening knives (26) are guided perpendicular to the work table (11) and are under the influence of springs (80). 27. Joining device according to claims 23 - 26, characterized in that the straightening knives (26) are connected to a pneumatic lifting drive. 28. Joining device according to claims 23 - 27, characterized in that the straightening knife (s) (26) sit on the overlap area (4) of the existing helix (0) and the last helix inserted during a joining operation. 29. Joining device according to claims 4-6, characterized in that the lower pneumatically operated transport piece (91) has a transport surface (95) which is arranged within an opening in the plane of an intermediate plate (93) and a drain plate (94). 30. Joining device according to claim 29, characterized in that the transport piece (91) is connected via a rod (97) to a pneumatic lifting drive cylinder (98), which in turn is arranged on a slide rod (101) arranged in the transport direction by a pneumatically operated drive cylinder (105) drivable slide (100) sits. 31. Joining device according to claims 29 and 30, characterized by a resilient in the transport direction on a slide rod (110) against the force of a spring (111) slidable counter-holder (107) with a pressure surface (108). 32. Joining device according to claims 29 - 31, characterized by a limiting screw (106) for the transport movement of the slider (100). 33. Joining device according to claims 4-6, characterized in that for aligning, holding and transporting a flat structure (A) during and after a joining process, a pneumatically driven resilient pin header device (120, 121) extending over the entire width of the work table (11) , 125, 126) is provided. 34. Joining device according to claim 33, characterized in that the pin header device consists of a plurality of juxtaposed arranged pneumatically via eccentric (124) and connecting rods (123) drivable pin headers (121, 126). 35. Joining device according to claims 28 - 32, characterized in that the alignment, holding and transport device lines for the fabric (A) can be driven pneumatically via compressed air, which can be switched by triggers actuated by the joining slide. 36. Joining device according to claims 4 _- 10, characterized in that two trailing wheel (42a) arranged on each resilient arm (42b) is used. 37. Joining device according to claim 36, characterized in that two trailing wheels (42a) arranged on each resilient arm (42b) are provided in the joining carriage (16) between the opposite ends of the discharge channels (44, 46). 38. Joining device according to claims 36 and 37, characterized in that the running surface of the trailing wheels (42a) is designed like the running surface of the joining wheel (42). Methods and devices for joining coils of metal wire or plastic wire to form flat structures List of terms used 0 existing helix 1 last helix added last la head bow 2 additional second helixes 2a head bow A fabric 3 insertion wire 4 overlap area 5 Insert wire spacing 6 7 8th 9 10 floor 11 work table 12 worktop 13 joining bench 14 leg 15 stiffening 16 joining slides 17 directional arrow 18 sliding foot 19 slide rod 20 drive motor 21 Spiral storage container on the left 22 Right spiral storage container 23 switches 24 adjustable trigger 25 bridge 26 straightening knife 27 28 supply roll 29 Wire insertion device 30 overflow left 31 upper course on the right 32 pneumatic distributors 33 inlet nipples 34 connection nipple 35 36 37 38 39 40 joining direction shown 41 work wall 42 joining wheel 42a lateral surface 43 annular gap. 44 Discharge channel I 45 acute angle 46 Discharge channel II 47 acute angle 48 Feed channel I 49 locking knife 50 pneumatic drive cylinders 51 intermediate rod 52 Free space 53 shear bar 54 adjusting screw 55 Free space 56 pinch roller 57 roll holder 58 pneumatic pressure cylinder 59 Feed channel II 60 distance 61 62 63 64 65 carriers 66 rack 67 carriers 68 drive gear 69 Drive roller 70 interim storage facilities 71 bearings 72 clutch 73 wall 74 bottom 75 spiral feed 75a auxiliary role 76 Bracket for straightening knife 77 slide rod 78 sliding bush 79. Sliding bush 80 spring 81 Direction arrow 82 83 84 85 86 87 88 89 90 transport device 91 lower, pneumatically operated transport piece 92 upper counterholder 93 intermediate plate 94 drain plate 95 transport area 96 transport piece 97 bar 98 drive cylinders 99 direction arrow (up / down) 100 slider 101 slide rod 102 holes 103 rear wall 104 holes 105 drive cylinders 106 limit screw 107 counterhold 108 pressure surface 109 slider 110 slide rod 111 spring 112 limit piece 113 holder 114 holder 115 116 117 118 119 120 locking / transport pin I 121 pin header I 122 connecting rod connection 123 connecting rod 124 drive eccentric 125 locking / transport pin II 126 pin header II 127 connecting rod connection 128 pin spacing 129 130 drive opening 131 wire guide 132 wire guide in working position 133 wire entry opening 134 ultrasonic transducer 135 hole knife 136 137 138 pneumatic drive cylinder 139 Directional arrow 140 wire transport device 141 slide rod 142 sliding foot 143 pneumatic drive cylinder 144 directional arrow 145 tunneling belt 146 drive roller 147 roller 148 engine 149 counter pressure tape 150 roller 151 guide rod 152 bearing plate 153 pneumatic pressure cylinder 154 155 top wall 156 front wall 157 middle wall 158 rear wall 159 bearings 160 shaft 161 bearings 162 drive shaft 163 clutch 164 wire feed opening 165 wire feedthrough

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