DE2021949A1 - Device for controlling the width of a running web - Google Patents

Description

202194 $

PATENT Attorney DIPL.-JNG. HARRY ROEVER

68 MANNHEIM 51 (FEUDENHEIM) AM BOGEN 23 POST BOX

Q-4, May 1970

R / be

Turbo Machine Company at 84o West Grove Street Landsdale, Pa. / DSA

Device for controlling the width of a running web

Priority to U.S. Patent Application No. 835,546 dated June 23, 1969

The invention relates to a device for controlling the Width of a running web, in particular one Servo mechanism to control the width of a running Web of continuous textile material.

Textile material, such as tow, is usually processed in devices in which the tow comes from a sack or a bag or a container, a drum or the like. is withdrawn and over a plurality of rods is performed, inter alia -in-der Wergbahn- · Ιηβ tension to ^

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attest to and around this material of the processing device feed in fora of a moving web. In order to be able to process this web correctly, it is necessary to to keep the width of the track as exactly as possible evenly, for example when this track is divided into a "*" further Processing machine is introduced, such as in a stapler.

The invention provides a device for adjusting the width of a running web of continuous material, such as a strand of thread. This device comprises a device for widening or narrowing the strand or other similar material after receiving input signals from buttons which are provided between this device for spreading or verifying and the device into which the web is introduced. For this purpose, one or more rods are provided which are pivotably mounted so that they can be moved away from at least one surface of the material web or onto this surface, these rods having curved surfaces for the contact of the material web. In the preferred embodiment of the invention, two rods are provided on a common, pivotably mounted frame ι one of these rods has a convex surface that rests against one track surface, and the other rod has a concave surface that is also facing an upper side of the track . In accordance with the relevant

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corresponding input signals coming from in the direction of movement the track behind the Rannen taffeta the ratuaen is swiveled in such a way that one or the other or both rods in "more or less." strong contact with the web surfaces. The concave bar tends to close the path to susansnen press while reducing the bandwidth. The convex bar, on the other hand, tries to widen the web of material.

An error scanning device continuously measures the deviation of the web width from the desired dimension The amount of the lap impulses emitted by this is the one described Rahaan swiveled, so that a permanent sewing regulation the Bahübrelte-takes place.

The object of the invention is therefore to provide one Servostschanlsnus to control the width of a continuously running material web.

The tasks, characteristics and advantages of the Srfindang result in detail from the following, on the drawings referring descriptions.

In the drawing, FIG. 1 is a perspective view a device for handling a moving material web; this figure shows the preferred embodiment of the invention with parts broken away

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and the device is shown in operation with a web of material running through the device.

Figure 2 is a schematic diagram of the servo system for the embodiment shown in FIG.

Figure 3 - is a section taken along section lines 3-3 in

Figure 1, other positions are shown in dash-dotted lines.

Figure 4 -. FIG. 13 is an enlarged end face of a portion of FIG Device shown in Figure 1, partially broken away, with another, dash-dotted line Location of one of the parts shown.

Figure 5 is a view taken in the direction of line 5-5 in FIG Figure 1.

Figure 6 is a perspective view of a modified one Embodiment of the invention.

Although specific embodiments of the invention have been selected for the purpose of illustration in the drawing, and these Embodiments of the invention are detailed below described with certain expressions, but this description is not intended to be identified in the claims

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restrict the inventive idea drawn.

In the drawings, Figure 1 shows part of a device, which denotes a total of nit Io and part of a (not shown in detail) is a larger machine, such as a Stitching machine for processing a continuous web Textile material. In the case of a stapler, this is processed Textile material tow that is withdrawn from a (not shown) supply in any form and then over and is pulled under a plurality of guide rods, both for guiding and tensioning the tow to some extent before the tentative point of its introduction to the Working mechanism of the stapler serve · If the tow dem As the stitching section of the machine gets closer, the guide rods are closer and closer to each other and the tension is increased differs from only a slight tension which leads to the removal of the Sagging due to the weight of the web between widely spaced guide rods serves up to a greater tension that arises from the fact that the tow wound around tie rods that are close together and is pulled over these poles. The tow strives on towards the rods in a direction transverse to its direction of movement wander when it is peeled off, and the web itself that comes out consists of a multitude of continuous threads, changes their web width often. The invention is concerned with special problem of bandwidth control, not with that Problem of wandering * or controlling the lateral movement

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Pushing the train.

As shown in Figure 1, the ait includes designated Io Part of the device has a frame 12 on which a plurality of fixed, straight guide rods 14, 16, 18, 2o, 22 and 24, around which a web 26 of tow is drawn, namely in the one shown by the arrows winding path. The effect of this arrangement is to tension and guide this path.

To control the width of the stretcher, a servomechanism is provided, which is represented schematically by the system shown in FIG. This system has a source of power which is designated as a whole by 3o, furthermore an error scanning device 4o and one designated as a whole by 5o Control device. The system shown is a pneumatic system, but it should be emphasized that this control could also work hydraulically, electrically or in some other way. The system shown corresponds to the type with a closed Loop insofar as the deviation between the desired state and the actual state is measured continuously, and if there is a discrepancy, something is done about it. As already stated above, the error is with which the invention is concerned, a deviation in web width. The web width can be larger or smaller than that be the desired web width at a certain point. Accordingly, by controlling the web width, a button 42 is

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Figures 1 and 2 _{r provided} in the direction of web movement above this point. By means of the servo system, the button controls the movements of the control device 5o provided further above in the direction of movement.

Based on the figures 1 * 3, the peculiarities of the Control device and its Arbeltweise in Besag on the Control of the width of the web 26 will be described. The control device 5o has a rabaen 52, which in any suitable Way asi Rahaen 12 is pivoted, for example, the shirred shaft 54, which is firmly seated de «frame 52 is connected, through this hlndurchtruft, and rotatably mounted in bearings la Fihsien 12 (not shown) is. The center line of the shaft 54 is parallel to the center lines of the guide shafts 14, 16, 18, 2o, 22 and 24. The shaft 54 is also in contact with an upper side of the web 26.

There are two control rods in the preventive example provided, including changing the web width. These control rods can be best defined by their location Krflssmngen compared to the surfaces of the towing 26. The control rod 56 may be referred to as the concave control rod and the control rod 58 as the convex control rod.

Xn Figures 1 and 3 are both convex and concave control rod shown in contact with track 26. As a result, the path is first through the concave bar

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narrowed and then widened by the convex bar, before you reach button 42. This state of affairs is merely accidental and for the purpose of illustration only Function of these control rods shown. The concave upper fish of the rod 56 tends to reduce the web width to cause when the web passes between the guide rod 16 and the light 54 under tension. The convex The surface of the control rod 58 strives to widen the path, when it passes over the rod 58, under tension between the shaft 54 and the guide rod 18 through. It can be seen that these rods are interchangeable in their position relative to the line of movement of the web. Call very much / narrow material is to be treated, it is desirable to keep the web wider than the desired width by moving the web widening rod 58 in the direction of travel is arranged in front of the control rod 56 causing a narrowing, whereby then the one narrowing effecting rod can serve as the last control to reduce the web width to that web width that when The path to the reference point is desired.

It will also be apparent to one of ordinary skill in the art that numerous can make other settings or changes to the mechanism as shown. For example Is it possible to store the rods on separate, swiveling frames, or the material just over the

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concave rod to guide, while the convex rod in the Normal state is kept out of contact with the web and only when it is necessary in contact with the web is brought; but it is also possible to reverse this process and only the convex bar normally keep in abutment with the web while the concave rod is kept at a distance from the towing track and only if it is necessary to be brought into contact with this web. However, it has been shown that by storing the two Rods in a common, pivotable frame and by maintaining a system of both rods the web the optimal degree of control of the web width can be achieved.

It has also been found that by scanning the location a tensioned edge of the web in close proximity to the control device, precise control of the web width is possible. In order to achieve this, a button 42 is provided, which is shown in greater detail in FIG the spring 44 clockwise around a shaft 46 which is carried by the button passes through, is spring loaded. The corrugation 46 is attached to the frame 48, which is in any attached in a suitable manner in the device 1st, such as by welding to the support frame 63, which is firmly connected to the frame 12. The button 42 assumes such a position as its free end

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- Io -

43 rests against the edge 27 (FIG. 1) of the web 26. The Vaster is preferably about 12 inches wide and curved outwardly away from the web so that it does not sit at the edge 27 of the web can impose. The spring preload by the spring 44 is sufficient to keep the button in contact with the web edge, while the web is moving in the transverse direction, i.e. transversely to the direction of movement according to those in FIGS. 1 and 3 illustrated arrows; Such a possibility of displacement is shown in Figure 4 by a dash-dotted line.

As Figure 5 shows, the button 42 is preferably arranged in such a way that that it lies over the top of the web 26. This is done by pressing the button, as shown, under is stored at an angle. In this way, the edge is pushed down a little as it passes the button, however, it resumes its normal position in the web when it is guided over the next guide rod. This The feature of the invention effectively causes curling or folding in the web edge.

Any deviation detected by the button 42 is indicated by the Servo system of the control device 5o, which is moved in order to correct this error This system will now be described in more detail below. As shown in Figures 2 and 4, the button is in a position in which the web width is narrower than that

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202TS49

desired optimal width at the scanning point. As a result has the button clockwise slightly out of the direction indicated by N. designated normal line swiveled out «The normal line is one which passes through the pivot centerline of shaft 46 which is normally parallel to edge 41 of the Button 42 would be if this edge is in the same plane and in Plant on the edge 27 of the web 26 is located. No pulse or signal is generated in this position, and this is the one optimal standard division in which the web width to be monitored is to be regarded as constant in the correct measure.

In the normal position, the edge 41 is at a distance from the Surfaces of the two valve plungers 7o and 72. These two Valve plungers are opened by springs 71 and 73, respectively loaded, so that through the lines 74 uitf 75 oncoming Air can escape through the vent holes 76 and 77, respectively. The lines 74 and 75 are constantly under pressure on one Source of controlled pressure 3o as shown in Figure 2 * These lines are connected to the ends of a pneumatic cylinder 8o which is attached to the frame 12.

It is desirable that the cylinder be mounted in such a way that that it can pivot, and for this purpose there is a guide track on an arm 15 extending from the frame 12 13 provided. A shaft 17 extends from the side of the Cylinder through the guide track 13 and is mounted at its outer end in a bearing that is fixed to the arm 15

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is held upright in (not shown) any suitable manner so that the cylinder is free to Shaft 17 can pivot and is still held in relation to arm 15.

Ia cylinder is a piston 82 (Figure 2), its Piston rod 84 ventilates through a suitable seal at the end of the cylinder and is pivotable by means of the pin 85 (FIG. 3) is connected to the frame 52. So when the piston 82 is axially displaced in the cylinder 8o, causes the Piston rod 84 pivotal movement of frame 52 about the centerline of shaft 54.

In the normal position, the pressure in lines 74 and 75 is the same, and consequently the pressure on the two is also the same Rarely of the piston 82 in the cylinder 8o the same. The frame 52 is therefore held in a fixed position. When the train 26 becomes narrower, as shown in FIG. 4 in indented lines, then the end 43 of the feeler 42 follows the edge 27 of the track, and the button 42 is pivoted clockwise. During this pivoting, it first takes up the space between the edge 41 and the plunger 70 then presses the valve plunger 7o inwards and opens the vent hole 76. This builds up in the line 74 a pressure, and as a result, the pressure behind the piston 82 in the cylinder So is greater than in front of the piston and in the Line 75. The piston is thus facing in the direction of view

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Figure 2 shifted to the left, and the rod 84 causes a Pivoting of the frame 52 counterclockwise around the center line of shaft 54. Frame 52 then passes that is to say in the position shown in dash-dotted lines in FIG Lines with A is shown. As a result, the concave control rod 56 is brought out of contact with the track 26, and the path can be released from the control rod 16 over the while 54 run. In addition, the convex, causing a broadening Control rod 58 moved so that it generates a greater tension in the 'web and spreads it wider. This means that the path is widened while it is on the Rod 18 and rod 2o runs.

When the web becomes wider, the edge 27 pushes the button 42 in the direction that it returns counterclockwise to its normal position, If it is the normal position has reached again, both vent holes are open and the pressure is on both sides of the piston again right away. The piston then remains in its position until one another error is sampled.

If the web becomes wider than desired, move it Button in the position shown in Figure 4 in dashed lines, which has the consequence that the valve plunger 72 closes the vent hole 77 and the pressure in the Line 75 is increased so that the piston is pushed to the right

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and the frame 52 is pivoted in the direction of the eye. Through this the contact of the control rod 58 with the surface of the Orbit decreased while the extent of the attachment of the surface the web is increased on the control rod 56, as shown in FIG Figure 3 is shown in phantom with b. This results in a rigging of the path and then a return movement of the button to its normal position.

Determined when using a button of the type described the distance between the surface of the pushbutton and the valve plungers 7o and 72 in some degree have the sensitivity the device. If the area 41 were to be permanently in contact with the valve plungers, then this would be the area or the permissible one Deviation for the web width only very small because of the response on a pivoting movement of the button would take place practically immediately. But if between the surface 41 and If an interspace is left free for the valve plungers, as described above, a permissible deviation range is created within which the bandwidth is can change without the device making any correction. Of course you can go to this area too change, other factors can also be changed. For example, to change this area within of the inventive concept, the respective distances between the points of contact of the surface 41 with the valve plungers and the center line of shaft 46, and between the

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Touch point of the path bit of the leading edge 43 and the center line of the light 46 can be changed.

Figure 6 shows another embodiment of the invention at which uses a number of buttons and where the width of the track is bridged powerfully and permanently in one direction while it is steered in the other direction.

In this example there is a modified frame Io2 is provided, in which the shaft 54 is rigidly attached; this light is stored in bearings in frame 12. However, the outer end of the light 54 is connected via a tab Io4 connected to the outer ends of the lights 56 and 58. The tab Io4 increases the stability of the light to one another and allows the light 56 to absorb a greater load. if also the frame Io2, as in the previous citation example, is pivoted about the center line of the light 54, then both control shafts are on the same side of the pivot shaft, instead of on opposite sides of the same. The web 26 is inside around the narrowing causing concave control rod 56 and then sucked over the light 54. There is therefore a permanent narrowing of the web 26. The pneumatic piston and cylinder 8o are the same as described above; the piston is like this with the frame Io2 connected that he pivots it about the center line of the Helle 54. Make the appropriate movement, the one widespread

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- ■ 16 -

Control rod 58 causing a change in system with the Brought surface of the web 26, and causes a widening of the web. So the upper shaft or rod is permanent tends to cause the web to be converted to a minimum width while the lower shaft 58 does the web tense intermittently in order to widen it again.

A pair of fillers or buttons Ho and 112 are on one Rod 114, this is insulated from it, stored. This pole 114 is attached to frame 12 in any suitable manner such that it runs across track 26. These Sensors are preferably made of spring steel or similar material and are spring-loaded in such a way that they rest on the track or come to rest on the metal rod 116 when between them and this metal rod there is no web. The rod 116 and the feelers Ho and 112 are connected to each other via an electrical circuit (not shown) in which each sensor is connected to the rod 116 cooperates as a switch. This electrical circuit controls the air pressure in lines 118 and 12o of the air cylinder 8 © by any suitable means such as a solenaid operated three-way valve (not shown) and thus controls the position of the cylinder 82 in the cylinder 8o.

The system shown is a so-called Sin-An system ....... V ^ 109808/1231

insofar as the tax wave or tax rod 56 causes permanent material and only then "'if. this material contracts over a still permissible"-' limit hiusiie, a change of the day of the .Rahmens Io2.vorgenommen'.wird. in the normal state causes di @ rod §S tetrM eineVersehaälerung of the web 26 ', and causes the SS Stang® either a broadening of the web to desired min .'- maS or at all When the track becomes too narrow and thus comes out of the B @ r @ ie & -between either one or both feelers Ho ₀ 112 on the one hand and the rod 115 on the other hand, these -.sensor form a circle .., the counter-clockwise direction caused this pivoting of the Eafmens Io2 to the Light 54 KONTT the convex bar 58 in abutment with ämw web 26 _β in widening the web runs this may again between the sensor and the rod 116; interrupts' - so the! rice and enables the frame to return to its - starting position -.

For the Ourehsehnittfaehmann - it can be seen that numerous modifications in the aareis, the § @ haltkkreis Ho to 116 and 112 ..: to 116 durehgmfOlirtan functions are possible, and the; Impact · -aa £ .den: 'frame. Io2 mn . There could be additional sensors are used MMAE circuits to similar _results? as described above to achieve. For example, circuit 112-116 could be used to widen the path sm, while circuit Ho-116 could be used to convert frame Io2 into:

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Center line of shaft 54 to be B <simmk® ^r M wmä ä »i®s <gto you convex S expensive rod 58 from the

atexiaiieben and at the same time the concave

to ver-deviations can occur within the made herds, for example by

a second group of antennae, which is the parenthe "distance from the first group of antennae", to set tm eijae teSer "ilseas" for the width of the web. Again wmmnmämt, sm end including the system of control "2i or decrease.

It is as © ^ f: # ira.t ..; ic'te, (äaB the controls in the multiple table ^ r © m lim »Jtosst« ss «eimgeart« n can be used, such as XoBo hml »ia * fw» £ tereii form in which the path is normally (faaftsäi <äi itasfif® §8 widened and between the antennae ^ mh & Mmsti wlTä aä Sie! Reise is normally closed ^ mm äm & ämsmg wrnsm Ulm lato becomes wider and one of the circles UsUt ₀ htmTÜW £ <gfa «ii & e actuation of the frame Io2

m is AEIE Bata ^^ # £ t "seriel small that the web wtmäms iwisefetgffi AEMM fillers runs, then- the scarf ~ tes" iffiitfö Wxmim ₀ s © <ie0 schlieeen the frame back to its Auegang ««

Each of these jycfei © ffie »takes place in a pulse-like manner while maintaining

kossstaatea railway widthsmreichs at the contlnuier »

BATH ORIGINAL

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κ "lichen passage of the web through the machine, thereby, that the control frame Io2 as far as possible in the direction of movement is attached in front of the stable where the lane should have a permissible lane width, it is possible that the Reduce the effects of any minor deviations in web width to a minimum. In addition, the position at which the fault is scanned, in the direction of movement behind the control frame, and as close as possible to this, lie.

In the modified embodiment according to FIG The principle of the use of buttons shown in the drawing along both edges of the web can easily be applied to the first Embodiment are applied; such an application is of course also within the scope of the invention.

^{> k} It is clear that numerous other modifications in the details, materials and arrangements can be made of parts that have been besehrieben above and shown,

. to explain the nature of the invention? here is also do not leave the inventive concept characterized in the claims.

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Claims (11)

- 2ο - Claims ..) Device for controlling the width of a running web which runs over a plurality of rods, characterized by a frame pivotably mounted in the device and carrying a plurality of rods pivotable with the frame, at least some of which are curved Pivoting devices for the frame, by means of which the curved part of at least one of the curved rods can be brought into contact with the track, and by sensing devices for scanning the width of the track and for controlling the pivoting device. 2.) Device according to claim 1, characterized in that at least one of the rods opposite a surface of the running web convex shape and at least one other rod one opposite to an upper side of the running web concave Has shape. 3.) Device according to claim 1 or 2, characterized in that at least one curved rod in permanent contact the train is held. 4.) Device according to claim 2, characterized in that at least one straight rod in the frame 109106/1231 .- 21 - is stored in the moving path of the running web lies between the convex and concave rods. 5.) Device according to claim 4, characterized in that that the convex and concave rods lie on opposite sides of the pivot point of the frame. 6.) Device according to claim 1, characterized in that that the sensing device comprises at least one button located behind the runner in the direction of movement of the web. 7.) Device according to one or more of claims 1 - 6, characterized in that the sensing device comprises at least one button which is located on the side edge of the web rests and is pivotally mounted in the device and is pressed against this edge in such a way that it is the Movements of the web edge follows and via control elements that respond to the movements of the button. Swivel device the frame controls » 8.) Device according to claim 1, characterized in that the sensing device at least one on a top fish button adjacent to the web for actuating a switch ν tung includes. 109808/1231 9.) Device according to one »or more of claims 1-8, characterized by a pivoting device for the frame provided pneumatic, double-acting cylinder old piston, its piston rod is pivotably connected to the frame, while the cylinder is pivotably mounted in the device, by a source of compressed air connected to the two ends of the cylinder by separate lines, and by means of an essentially flat button which is pivotably mounted in the device in such a way that it rests against an edge of the web and is pressed resiliently against this edge, so that it is the movements of the The edge of the web follows and then valves located in the lines are actuated, which are located at the two ends of the cylinder control applied pressure. lo.) Device according to claim 4, characterized in that the ends of at least some of the rods remote from the frame are rigidly connected to one another. 11.) Device according to claim 7, characterized in that the button rests on the surface of the web. 109808/1231