DE2751241A1 - DEVICE FOR PUNCHING ROWS OF HOLES IN LONGITUDINAL, FLAT LINES MADE OF ELASTIC MATERIAL - Google Patents

Description

my reference: 0725 Pt

RACAL-ZONAL LIMITED Western Road, Bracknell , Berkshire, England

Device for punching rows of holes in elongated, flat, elastic Material existing links

The invention relates to a device for punching rows of holes in elongated, flat, from elastic material in the form of ribbons, films or other elements. Such holes are, for example, in magnetic recording media or film strips used. The holes can be openings or recesses or depressions.

The invention relates to a device

for punching rows of holes with even distances between the holes in elongated members made of elastic material. Rotatable support means are initially provided, on which a plurality of punching mandrels are mounted, which are essentially radially movable relative to these carrier means. Furthermore, as a means of

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Receiving the elastic member and a rotary drive is provided for the punching mandrels, which relative to the rotatable carrier means is eccentrically mounted in such a way that the punching mandrel moves to and fro for punching the holes in the elastic member will.

So far, the rows of holes extending in the longitudinal direction have been used as engagement openings for drive mandrels made from rows of punching mandrels that work together with a number of dies. One has to go back and forth forward movement take place, and the film or tape must be completely between each working stroke of the punching mandrels certain, exactly to be followed path are advanced. According to this principle working devices, which in the belts or films work in corresponding holes or recesses, because of the extremely high accuracy with which the feed mechanism must work, very costly.

Proposals have already been made to and replace the forward motion with a rotary motion. However, these known proposals have disadvantages in this respect linked, must be provided as cams for the operation of the punching mandrels; this inevitably leads to increased accelerations and thus to a high level of wear and tear and energy consumption. Although theoretically such devices have higher powers When compared to conventional reciprocating devices, the bottom line is performance not as high as desirable, with the extraordinarily high wear and tear against the general introduction of these known advantages directions speaks.

A great difficulty in the manufacture of stamping holes or punched recesses in films or in magnetic tapes is due to the difficulty of feeding or discharging of the tape or film in or out of a rotary device. If no adequate control of the film is provided is, it will in no case get into the right position

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sition with regard to the punching mandrels, with even a slight deviation leading to considerable amounts of film material must be disposed of as waste.

U.S. Patent No. 2,760,576 shows a rotary device for punching holes or a corresponding one Punching apparatus, whereby it should be noted, however, that this device in this respect by no means brings the required accuracy, as the feeding device and the discharging device operate inappropriately and, moreover, the punch mandrels are under the action of springs. This inevitably leads as a consequence the wear and tear and fatigue of the springs lead to considerable inaccuracies, even if at the beginning adequate operation is recorded.

In addition, it is very important that the film or the magnetic tape is not scratched or damaged in any way, since such damage is optical and from an acoustic point of view, this results in inadequate reproduction, i.e. reproduction.

The invention relates to a device for punching rows of holes in elongated, flat, elastic Material existing links · The invention is characterized in that a ring member rotatable about its longitudinal axis and a plurality of punching mandrels are provided, the latter being arranged around the ring member at a distance from one another and in the Ring member are mounted substantially radially displaceable, that also a generally annular rotary member concentrically and spaced within the ring member such that a receiving chamber for the flexible member is formed, that molded pieces are provided which are supported by the annular Drebjglied and arranged so that the active parts of the Punching mandrels are received in a punching zone that means are provided for moving the punching mandrels in the punching zone into these shaped pieces, that a rotary drive member is arranged,

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which forcibly moves the ring member and the ring-shaped member, that further a first guide device for transporting the flexible member is provided in the punching zone, this guide device is used to guide the flexible member over the to pull lying between the guide device and the punching zone, and that a second guide device for The flexible member is received when it emerges from the punching zone, this second guide device for this purpose serves, the flexible member over the distance between the punching zone on the one hand and the second guide device on the other hand to pull away.

Preferably, the first guide device is arranged so that when receiving the elongated, flexible, flat Link encloses the line of contact with an imaginary plane at an angle in the range from 70 ° to 76 °, this imaginary plane contain the two axes of rotation of the ring containing the punching mandrels and the drive means. It is found been that this angular range is very well suited for a compact and also closed arrangement of the device as well as for a smooth and quick feeding of the flexible member.

The elongated, flexible member can extend along an angle of 180 ° in the space between the punching means and the Move fittings as such. Such an angle is preferred insofar as the progressive movement of the punch mandrels comparatively low accelerations and thus low wear into the corresponding fittings ensures, while the angle is of the order of magnitude of about 180o, a suitable arrangement of the guide means for the feed and relieved for discharge. Similar remarks also apply to the angles and the angular ranges of the guide means Conveying out.

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For certain elongated, flexible links and under very specific working conditions, it may be useful to Provide pressurized gas nozzle from which a pressurized gas impinges directly on the elongated members, namely in a zone where the effective parts of the punching means are extracted from the corresponding fittings. This particular ^ Measure ensures that the elongated member is by no means prematurely lifted from the surface to be punched, which can be serious Would lead to malfunctions in the operation of the device; the consequence of this would inevitably be inaccurate punching of the Holes.

Preferably, means are provided which extend into such a position in the punch ring that under Vacuum exposure pulls the material to be punched back from the elongated, flexible member. This feature contributes to an improvement in the very high rotational speed hole punch because this feature ensures that the strip or film is in no way coated with the punched-out parts as a result of electrostatic charging, whereby as is known, this electrostatic charge takes place in the film or tape.

The drive ring preferably has an annular groove, the head of each punching mandrel partially in this annular groove intervenes. This construction has the advantage of being extremely simple, both in terms of manufacture as well as in terms of assembly. A number of links are also provided which are adjustable in the punching ring are arranged, each link contacting a corresponding one of the punch mandrels so that on each Punch mandrel a force is exerted which is perpendicular to the longitudinal direction of the punching mandrel. This set of links has the advantage that a high accuracy in the lateral direction with respect to the longitudinal direction of the elongated, flexible member can be sustained.

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Preferably, each fitting is in the annular ji, rotatable link mounted by means of adhesive, the location of each link relative to the corresponding punching mandrel by engaging the active part of the punching mandrel in the shaped piece is determined while the adhesive solidifies. This is a feature that affects the overall arrangement of the device significantly simplified, while a high degree of precision between the fittings on the one hand and the punching mandrels on the other is ensured. The punching mandrels act as a kind of fixing agent and are in engagement with the during manufacture Moldings held until the adhesive has cured Since the accuracy of the punched holes will be about 0.0025mm must, the arrangement of a chuck would involve considerable complication and expense.

The preferred range of eccentricity of the axis of the punch ring relative to the axis of the drive ring is 0.10 up to 0.60 cm. This comparatively small eccentricity is adequate to achieve the purpose of the device and serves at the same time that the unbalanced forces on a reasonable Level to be maintained.

The inventive device for punching holes is illustrated in somewhat more detail below with reference to the drawing. In this show in a purely schematic way:

Fig. 1 is a partial view, partly in longitudinal section, of a preferred embodiment of the invention Device for punching holes in films or tapes,

FIG. 2 is an end view in the direction of arrow A of the device according to FIG. 1,

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Fig. 3 is a partial view along the line 3-3 in Fig. 1,

Figure 4 is a partial end view of the invention

Device, part of the device not being shown for the sake of clarity, and the illustration showing a large number of angular positions during the process of inserting the film or tape,

5 shows a section on an enlarged scale through a punching mandrel of the device according to the invention, with the film in the various positions according to FIG. will be shown.

The device according to Figures 1 to 5 is essentially similar to the device according to Figures 1 and 2 of the main application P 25 55 064.5, but with further details and changes are indicated, including a supply device for the film, tape or other elongate Material for the punching device; In addition, a discharge device is also described and shown, which the elongated material removed from the punch.

The embodiment shown in FIGS. 1, 2 and 3 form has a bearing for the hollow shaft 143 arranged in the middle, with which the risk of damaging or destroying the support bearings is primarily reduced as a result of those forces which are caused by the eccentricity of the rotating device. the stationary sleeve 166 extends rearwardly from plate 172, at the opposite of which plate 172 is removed lying end a bearing seat for the outer race 173 of a

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Ball bearing 175 is formed, while the other race 177 of this ball bearing 175 is supported by the drive shaft 143 and is secured against rotational movement. One arranged in the immediate vicinity of the plate 172 and supporting the drive shaft 143 Ball bearing 180 has only one row of balls, in contrast to the double row ball bearing, which is in the device according to the main application P 25 55 064.5 is used. The inner race 181 is counteracted by means of a nut 182 a stop of the shaft 143 pressed, while the outer race 183 with the help of an annular plate 168 against a Inner shoulder of the sleeve 166 is pressed.

The drive shaft 143 carries a drive roller 144 on the outside of the sleeve 166, which is connected to the drive shaft 143 is connected via a wedge 145. The plates 172 and 200 are connected to one another by a ring of bolts 201, wherein For the sake of clarity, only two bolts 201 are shown. Each bolt is through one with one Flanged sleeve 203 passed through, the outer circumference of this sleeve 203 surrounded by a washer 205 and the bolts 201 are locked by means of plate-shaped, resilient washers 207.

1 of the drawings also shows a bearing arrangement for the plate 200 which surrounds the end flange 170 of the sleeve 166. The flange is connected to the plate 172 via bolts 171, the drawing showing only a single bolt 171 shows. The plate 200 is generally ring-shaped and has a flat in its upper part, against which applies one end of a set screw 202 which is mounted in a bracket 204 of the bearing plate 172 of the device is. The lower part of the plate is supported by a spring 206, the force of which with the aid of a conventional adjusting device can be changed, this adjusting device is also mounted on the bearing plate 172. The plate 200 carries a projection that carries one race 208 of the ball bearing 210, while the other race 212 of the

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Drive ring 114 is worn. The annular groove 115, which regulates the movement of the punching mandrels 112, is of an annular shape Lip 216 formed, which forms a physical unit with the ring 114. In accordance with the first embodiment, the punching mandrels 112 have heads 113, which with the Nut 115 cooperate. It also takes care of a number of ring members 136 mounted by means of screws 137 so that a lateral, adjustable pressure can be exerted on the punching mandrels.The punching ring 110 is made in one piece, but otherwise has to fulfill the same function as in the device according to the main application P 25 55 064.5. The im Cross-section of trapezoidal ring 125, which rests on the shaped ring 116 in the punching zone, is carried by the punched ring. The punching ring 101 is connected to the sleeve 143 via screw bolts 141, with only one for the sake of clarity single bolt 141 is shown.

As can be seen from Fig. 2 of the drawing, the curved nozzle arrangement 153 is articulated at the point 154, With a simple swivel movement you can control the nozzles and the way the film passes through the device is moved through, can be performed. One in the Zeiclji The spring, not shown further, can be provided to resiliently press the nozzle in the direction of the film a stop 157 is provided which cooperates with the housing 162 and in this way ensures that the risk of contact with the film by the parts of the nozzle is eliminated. The arched extension of the nozzle arrangement can be based on that part of the scope of the effective parts of the Device are limited in which the punch mandrels 112 are pulled out of the fittings 117. It is precisely this zone in which there is a risk that the film 300 will be lifted due to the return movement of the punch mandrels. It can Adjusting means are provided, by means of which the distance between the nozzle arrangement 153 and the film can be changed can. The nozzle arrangement 153 can also extend across the punching zone; of course there is also the possibility

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possibility of using a separate arrangement.

In deviation from the device according to the main application P 25 55 064.5, the guide member 147 is a simple one Plate formed and supported by a double row ball bearing 160 and the shaft 161 of the housing 162. The inner race of the double-row ball bearing 160 strikes at one end against a stop shoulder of the shaft 161, while the other ^ End rests against a spacer 167, which in turn is held in place by a nut 169. The nozzle arrangement 153 generally agrees with that according to the device according to the main application P 25 55 064.5 match. The punched-out material is removed via a shaft 150 under vacuum.

Referring to Fig. 2, the film or the - "and 300 is introduced into the device via an adjustable roller 250. This adjustable roller 250 has end flanges 252 and a central part comprising two cylindrical parts 254 with a j

having concave part 256 therebetween. The purpose of this particular shape is, as far as possible, to keep any contact j between the film on the one hand and the surface of the guide roller on the other hand to prevent and in this way damage to exclude the possibility of the material being damaged by scratches and the like. The guide roller 250 is freely rotatable on a spindle 258 stored, which in turn is adjustably connected to a rod 260 such that the angle of the feed of the material is always correct, regardless of the nature or speed of the film or tape. The spindle lies in a plane which is perpendicular to the axis of rotation of the punch ring. The leadership effect of the role is stationary arranged guide 262 supported, which has a small distance from the flanges 252 of the guide roller. the stationary guide is arranged so that a movement of the FiI-Jmes between the flanges 252 is ensured. The angle of inclination of the spindle in its plane perpendicular to the axis of rotation of the punching ring is approximately 17 ° to the horizontal,

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this value was found to be a satisfactory one Operation leads. This angle assumes that the eccentricity of the punch ring 116 and the drive ring 214 for the punch are vertical.

The guide roller 250 is from the surface of the eccentric ^ i see the member of the rotating assembly quite a bit away, and it has been found that for a 16 mm film that space which ^ is required to view the film 300 from a direction substantially parallel to the axis of rotation of the device to twist out in such a direction in which it is fed to the punching surface, is about 76 mm. During this Through passage, the motion of the film is converted from a generally axial direction to a direction which is tangential to the working surface of the punching device at the level of the entrance. The peripheral area of the guide roller 250 the area in which the film 300 or the tape leaves this guide roller 250 is immediately below, but essentially perpendicular to the area in which the film or tape is picked up by the punching device will.

The effect of twisting the tape or film through an angle of approximately 82 ° between the guide roller and the punch surface on the mold ring 116 (generally an annular rotatable member) as a result of the selected Relative positions ensure that a slightly curved cross-section is transferred to the tape or film 300, and since the tape or film touches the punching surface of the form ring 116, it is caused by the tensile forces in this tape or film ! flattened, and this flattening ensures that one side edge of the tape or film rests firmly against the guide member 147 (Fig. 5) with the result that the tape or the film will have the exact location at that point in time at which they reach the punching zone. The combination of the rotary movement and the approach at an angle to the plane of rotation of the Punching mandrels ensures that the film reaches the punching surface of the form ring 116 without -that -then either the

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Guides or touch the guide ring 147 of the punching device.

Reference numeral 270 denotes an out conveyor which is generally similar to the feeder. However, a certain amount of adjustment is required in order to take into account the operating conditions, the tension of the film, the temperature and also the relative humidity. Corresponding parts of the feeding device 250 have the same reference numbers, but with the addition of ^{the letter "A M".}

It is important that the edge of the film not exert a frictional force on the inner surfaces during operation the flanges of the feed rollers or discharge guide rollers 250,

270 to an extent that destroys the edges of the film leads.

In the immediate vicinity of the molded ring 116, a wheel

271 can be provided with a single flange, the flange of this guide wheel 271 opposite the film only one very small spacing, on the order of about 0.025 mm to 0.125 mm, it is by no means intended that contact with the film actually occurs during normal operation. When the tension of the film or tape decreases and as a result the film 300 or the tape lifts off the punching surface, the wheel 271 limits such a Withdrawal process.

The drive of the film or belt and the like is generally carried out by conventional means, with it however, it is desirable that the cutouts punched into the film or tape are also used and with a sprout drum or a sprout drive work together in such a way that the film provides the necessary tension when it leaves the mold ring 116. The tension in the film must be carefully controlled and matched

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■ by no means the tension in the supply or discharge. the The tension applied j is preferably in the range from 50 to 300 grams, these values in no way being to be regarded as limit values.

The pressure in the domed air nozzle assembly 153 is on the order of about 1.41 kg / cm, but with the actual pressure corresponding to changes in eccentricity fluctuates, which are unavoidable in view of the allowable tolerances of the device. By arranging a spring device, not shown any further in the drawing, for this air nozzle arrangement 153, the change can be kept to a minimum.

In the embodiment according to the main application P 25 55 064.5, the wrap angle of the tape is j on the rotating device about 300 to 330 °, while on the two-

j Q

j th realization form the wrap is limited to about 210 j has been.

The manner of operation is generally similar to that described in the main application P 25 55 064.5

Operation.

As can be seen from the context, the feeding of the film or tape takes place essentially in parallel at the beginning

j to the axis of rotation of the device, although due to the Inclination of the feed roller 250, the tape or the film is then given an inclination which is in the order of magnitude of 14 to 20 °, preferably 17 °, relative to the horizontal. The movie 300 or the tape is then deflected through an angle of 82 ° around the guide roller 250 and then around one equal angle around the roller 270 arranged on the exit side. The opposite is in the order of magnitude of 14 to 20 ° The angle of inclination lying on the horizontal ensures maximum penetration of the punching mandrels 112 at top dead center. Of the

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The angle of inclination is therefore matched to the eccentricity of the form ring 116 and the drive ring 114. In this way the preferably angular range is between 76 ° and 70 °, specifically relative to a line passing through the spaced apart Axes of rotation of the drive ring 114 and the form ring 116 goes through and lies in a plane which is perpendicular to these two axes and also contains the axis of rotation of the guide rollers 250 or 270. In a similar way the film is lifted from the device in a direction generally parallel to the axis of rotation, whereby it however, it may be necessary to move the film around a guide roller shortly after it has been released from the work surface the device has ended.

For a better understanding of the details of the feed device and the discharge device is referred to below Figures 4 and 5 pointed out. It should be noted that only the feed arrangement is shown, although It should be noted that the discharge device is essentially)! is the same but works in reverse order.

As can be seen from Fig. 4 of the drawing, the film j 300 passed through a number of locations which lie on the I intersection lines 1-11. The corresponding places in Referring to the annular punching surface go from Fig. 5 of the drawing emerged. The sequence of these individual positions is shown with the same reference numerals as the cutting lines; Figure 5 shows with particular clarity the lateral edge at a boundary of the adjacent punching surface. The Fig. 5 also shows the tip of one of the punching mandrels 112, specifically in the position 4 shown with a continuous line of lines the position 6 has a punching mandrel with an interrupted one Line indicated position reached below the position 4, which is shown with a continuous line is. In position 11, in which the film rests fully on the punching surface, one of the punching mandrels has the one interrupted Line line shown position reached, namely

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below position 4 indicated by a continuous line of lines. The two positions shown with broken lines only show the lowest extreme position of the top part.

As can be seen from Fig. 5 of the drawing, the film 300 or the tape moves progressively from a position which is by no means in alignment with the lateral guide 147 into a position 1 in which the right edge, not shown, is precisely aligned with the lateral guide surface.

The adjustability of the rollers for the supply and for the removal ensures that the exact path of the film can be determined so that one after the other in the positions 7 to j 10 the film or tape is slowly moved into position 11 without the guide itself acting in any other way as an indicator and as a safety element in the event that the machine does not work properly, i.e. has any malfunction.

The correct operation of the device makes it necessary that the tension of the tape or film is in the range of the off ! conveying device is appropriate and constant, as this is the only way it is ensured that the flat, elongated flexible member, e.g. B. the film or the tape, the exact position in the punching zone maintains properly. Conventional tensioning devices can be used.

As mentioned above, it is extraordinary It is important that the film or tape remains free of any scratches or other marks, in order to achieve these Requirement the roles of the described embodiment can be replaced by two working on the principle of air cushions de tours. This eliminates the possibility of Frictional forces are switched off with the result that also blemishes or damage to the surface of the film or tape ! can be excluded.

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The device described above works continuously in rotary motion and the only parts of it,
which perform a back and forth movement, that is, a translation movement, are the punching mandrels themselves, whose weight is comparatively low and whose shape can have the usual standard shape. This means that comparatively high belt speeds can be maintained, on the order of, for example, 130 m per minute. The device according to the invention is far superior to the conventional devices in which the tape is passed in the longitudinal direction below the punching mandrels, which perform the translational movement along vertical axes, since in such devices the reciprocating punching mandrels have to be mounted in comparatively heavy bearing blocks, with the
The belt must be driven intermittently and precisely synchronized with the punching mandrels. The consequence of this is that it is extremely difficult to achieve a belt speed with such an apparatus which is greater than approximately 12 meters per minute.

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Claims (1)

275-2-1 j SUBMITTED PATENT CLAIMS 1. ) Device for punching rows of holes in elongated, flat members made of elastic material, characterized in that a ring member (110) rotatable about its longitudinal axis and a plurality of punching mandrels (112) are provided, the latter around the ring member with They are arranged at a distance from one another and are mounted in the ring member (110) so as to be essentially radially displaceable, so that a generally ring-shaped rotary member (116) is also provided concentrically and at a distance within the ring member (110) in such a way that a receiving chamber for the flexible member (300) is formed that shaped pieces (117) are provided which are supported by the annular rotary member (116) and are arranged so that the Virkteile of the punching mandrels (112) are received in a punching zone, that means (114) for moving the punching mandrels in the Punching zone are provided in these shaped pieces into that a rotary drive member is arranged which forced the ring member and the ring-shaped member moves that a first guide device (250J) is further provided for transporting the flexible member (300) into the punching zone, this guide device serving to pull the flexible member over the distance between the guide device and the punching zone, and that a second Guide device (270) is provided for receiving the flexible member when it emerges from the punching zone, this second guide device serving to pull the flexible member over the distance between the punching zone on the one hand and the second guide device on the other - A 2 - 809821/0867 ORIGINAL INSPECTED 2. Apparatus according to claim 1, characterized that the first guide device is arranged so that when receiving the elongated, flexible, flat member (300) the line of contact at an angle in the range of 70 ° to 76 ° with respect to an imaginary plane runs, which contains the axes of rotation of the punch ring and the punch drive ring. 3. Apparatus according to claim 2, characterized in that the elongate member (300) is so arranged is that it moves through an angle of more than 180 ° in this space, that a line of original contact is guided with the first guide device so that it lies in a plane that is both to the imaginary Plane and to the axes of rotation of the punch ring (110) and the punch drive ring (114) is perpendicular, that the elongated flexible member from its original position upstream of the first guide device by an angle of is rotated substantially 82 ° so that upon contact with the annular rotatable member (116) the elongated, flexible Member is tangential to the annular rotatable member in the line of contact and is arranged so that the elongate Member during its movement from the guide device in the direction of the line of contact with the annular rotatable Member is rotated through an angle of substantially 90 °. , 4. Device according to one of Claims 1 to 3, characterized in that the second guide device (270) is arranged so that when the elongated flexible, flat member (300) enters the line of contact with the axes of rotation of the punching ring (110) and the Punch drive ring (114) containing an imaginary plane Includes angles on the order of 70 to 76 °. - ^ A 3- 809821/0867 5. Apparatus according to claim 4, characterized in that the elongated flexible member (300) is arranged to make end contact with the second guide device (270) along a line shown in FIG a plane which is both perpendicular to the imaginary plane and to the axes of rotation of the punching ring (110) and of the punch drive ring (114) lies so that the elongated flexible member is arranged so that it is out of the direction when leaving the annular rotatable member (116) is rotated out by substantially 82 ° until it comes into contact with the second guide device (270) and that the flexible elongate member during it Movement from the annular rotatable member to the second guide device is rotated substantially 90 °. 6. Device according to one of claims 1 to 5, characterized in that each shaped piece (117) is held in the annular rotatable member (116) by adhesive, and that the location of each mold member relative to the corresponding punching mandrel (112) by introducing the active part of the punching mandrel into the shaped piece is determined during the curing of the adhesive. 7. Device according to one of claims 1 to 6, characterized in that the feed device is a Has feed roller (250) which is located on the circumference end flanges (252) and one between the two flanges in the Has cross-section concave central part (254). 8. Device according to one of claims 1 to 7, characterized in that the discharge device a roller (250A) which has end flanges (252A) lying on the Itafang and a roller lying between the flanges, has a concave central portion (254A) in cross-section. - A 4 - 809821/0861 9. Apparatus according to claim 7 »characterized in that in the immediate Kähe the feed roller (25O) a stationary guide (262) is arranged, which ensures that the elongated flexible member (300) lies precisely between the flanges (252) of the feed roller (250). 10. Apparatus according to claim 8, characterized in that in the immediate vicinity of the discharge roller (250A) a stationary guide (262A) is arranged, which ensures that the elongated flexible member (300) lies exactly between the flanges (252A) of the discharge roller (250 A). 809821/0867