DE3041410A1 - Text orientating device - Google Patents

Description

T.EDTKE - BOHLING - chins 304HIO Grupe - Pellmann

Dipl.-Ing. R. Kinne Dipl.-Ing. R group Dipl.-Ing. B. Pellmann

Bavariaring 4, PO Box 202403

8000 Munich 2

Tel .: 089-539653; ----.-

Telex: 5-24845 tipat _ - .-. cable: Germaniapatent coins

December 18, 1980 DE 0866

description Original alignment device

Technical area

The invention relates to an original alignment device for automatically aligning the front edge of a sheet-shaped original with respect to a reading section while the original is being transported to the reading section, and in particular to an original alignment device for automatically correcting the transport direction of the original, the tends to be transported obliquely, in a correct direction.

State of the art

Some machines which have the task of reading an original, such as copiers, facsimile machines, etc., have one Mechanism for the automatic transport of the original

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Doiilacho Hunk _t Münchenl KId W / 01070 Drnsdnar [tank (Munich) KIO 3039 644 PoslsCheck (Munctinnl KIo 670-43-804

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nals as well as a mechanism for automatic alignment of the leading edge of the transported original. Some of the alignment devices of these conventional mechanisms move movable guide plates which are provided on one or both sides of an original that is transported at an angle are to align such an original before adding a;. Read section reached, and press with the guide plates ge:. the sides of the slanted original, thereby correcting the transport direction of the original. Furthermore, may - ' come to mind as a powerful alignment device to determine the condition of a transported original and To move the transport rollers into a desired position in the direction of the axis of rotation or to turn the rollers, as required, until the leading edge of the original takes a desired position.

The above mechanisms are complicated in construction, and when the guide plates and the Rolls have large dimensions, the original to be corrected must have a certain thickness or rigidity, whereby it It is difficult to make these mechanisms work with very thin originals such as airmail paper work effectively. Moreover, mechanisms that do not have such an alignment device are difficult to use the operator of the copier or the like when feeding an original at the same time for correct position of the Originals regarding the guidance plate or guideline.

The object of the invention is therefore to create an original alignment device, which can align thin originals and is simply constructed.

Disclosure of the invention
The alignment device according to the invention comprises a ball

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without a specific axis of rotation which, when driven, rotates following the movement of the drive source, a counter element arranged opposite the ball for holding a; sheet-shaped originals between itself and the ball, and arrival, operating means for driving the ball or of the counter element, to transport the sheet original in the direction of an acute angular kels with respect to a guide surface which is provided at a right angle to a · original reading section so that the sheet-shaped original is transported while its leading edge with respect to the reading portion is directed from -., ..- and while the sheet-shaped original. is held between "the ball and the counter element.

In the above-mentioned device, the counter-element can be a holding plate which is attached to the device body or it may be a cylindrical roller or a spherical roller. The ball, especially if it is above The roller is arranged, can preferably be a metal ball, since a certain or greater weight is necessary is to hold down the original; however, other materials can also be used. At least the surface either the ball or the counter element can preferably consist of a material with a high coefficient of friction, so that the transport force on the original is greater.

VJenn in the construction described above for Guide surface transported original rests against this surface and its transport direction is in that direction To change in which the original is aligned, the ball rotates freely so that it aligns the original not hindered and ensures a good result. \

Brief description of the drawings
Figure 1 is a perspective view of a facsimile

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device to which the invention is applied.

FIG. 2 is a sectional view of the device according to FIG. 1, the section being guided in the original feed direction is.

FIG. 3 is a plan view of the original transport section of the device according to FIG. 1.

Figures 4 to 6 are front views showing the relationship between the counter member and the ball of the invention.

Figure 7 is a perspective view of a facsimile machine

advice to which the invention is applied. 15th

FIG. 8 is a sectional view of the device according to FIG. 7, the section being guided in the original feed direction is.

FIG. 9 is a top view of the original transport section of the device according to FIG.

Figure 10 is a front view showing the ball retaining mechanism of the invention.
25th

Figure 11 is a front view of a ball retaining mechanism; who works with an electromagnet that has a permanent magnet as an iron core.

Figure 12 is a main sectional view of the electromagnet device the invention.

Figure 13 is a bottom view of the device of Figure 12 as viewed in the direction of arrow A. 35

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FIG. 14 is a sectional view showing the state that the ball is attracted in the apparatus of FIG is.

Figure 15 is a sectional view of the iron core.

Figure 16 is a sectional view of an essential portion of the electromagnet of the invention.

Figure 17 is a plan view of a sheet showing an example of the formation of the non-magnetic material layer of the invention shows.

Figure 18 is a sectional view of a ball showing another embodiment of the invention.

Figure 19 is a cross-sectional view of a facsimile machine relating to the timing of power supply to the electromagnet is improved, the cut in the original feed direction is led.

Figure 20 is a side view of the original transport section.

Figure 21 is a plan view thereof.

FIG. 22 is a side view showing the holding mechanism of the roller section shown in FIGS.
30th

FIG. 23 is a view taken in the direction of an arrow A in FIG.

Figure 24 is a front view of an alignment device showing an embodiment in which the ball is

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and is moved a distance between the ball and to create the counter element.

Figure 25 is a top plan view of an alignment device showing an embodiment in which the ball is in a position ner plane is moved to create a distance between the ball and the counter element.

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Best mode for carrying out the invention

In order to explain the invention in more detail, the following Embodiments of the invention explained with reference to the accompanying drawings.

Figure 1 shows the original transport section of a facsimile machine, to which the invention is applied. In the figure, reference numeral 1 denotes an original support surface and numeral 2 an original reading section. Two pairs of transport rollers are arranged under a cover 3. While an original passes through the reading section while being held between the rollers, a lamp lights it up illuminated as shown in Figure 2, the image of the original being passed through an optical system to a photoelectric Transducer element (CCD) is directed and by a optical image is converted into an electrical signal. On the back of the original support surface 1 - when viewed In the figure - a guide plate 4 is attached at right angles to the slot direction of the reading section. The one Side of this plate 4, which is located next to the original support surface 1, forms a guide surface 4 for guiding of the transported original. With a holding plate 6 is designated, which forms the counter element of the invention, and As FIG. 2 shows, a metal ball is arranged below this holding plate 6, which is driven by a drive friction roller

7 is driven. The original is between this ball

8 and the holding plate 6 passed so that the original is aligned. On the device, the holding plate 6 is attached to the guide plate Ά with the help of hinges 9 so that it can be opened with respect to the original path. The original is pressed against the ball 8 by the weight of this guide plate, and since the ball 8 is rotated in the manner described above, the original is conveyed to the guide surface 5.

If the retaining plate 6 is lightweight, can to the

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Hinges a coil spring can be attached so that the plate 6 is then pressed towards the ball 8. ;

In the following, with reference to FIGS the device training according to the invention and the method explained, through which the original is aligned. As already mentioned, the ball 8 is driven by the friction roller 7, and - as shown - the rotatable shaft 10 of this roller 7 is not parallel to the direction of the slot 11 of the reading section 2 mounted, the angle enclosed between the normal of the shaft 10 and the guide surface is an acute angle between 20 ° and 30 °. The shaft 10 is by means of a universal joint 12, which with a coil spring works, with the rotatable shaft of a Motor 13 connected, which forms a drive source. If in this embodiment the motor 13 rotates clockwise executes, the roller 7 is rotated in the direction of the arrow and the ball 8, which is arranged on the roller 7, rotated counterclockwise by roller 7. The ball 8 is in such a position that they by about 0.5 to Protrudes 2 mm from the original support surface 1. Ever the larger the diameter of the ball 8, the stronger the degree of contact with the original and the more therefore the transport power on the original is increased. Furthermore, the ball 8 is supported by the wall surface around the ball 8 and by the roller 7 so that they are constantly rotated can so that it evenly transports the original held between the ball 8 and the holding plate 6. In the figures 2 and 3, reference numerals 15 and 16 denote rollers for transporting the original while they are there between hold, reference numeral 17 denotes a lamp for illuminating the original, reference numeral 18 denotes a Mirror, reference numeral 19 denotes an imaging lens and reference numeral 20 denotes a CCD element. 35

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The following describes the process of aligning the original using the drive mechanism described above. If, as shown in Figure 3, the original between the ball 8 and the holding plate 6 is inserted so that the pages of the original are not parallel to the reference surface, the ball 8 is rotated on the friction roller 7 as if they an axis parallel to the axis of rotation of the roller 7. In other words, the dot-dash line on the ball 8 in Figure 3 reproduced line shows the contact area of the ball 8 of the roller 7 and simultaneously forms the contact area with the ¹ Original 14, so that the original is moved forward in the arrow direction fourteenth The original 14 is transported in the direction of the arrow until the right side of the front end of the original hits the guide surface 5. When the front end section 21 of the original hits the guide section, there is a resistance between the original and the guide surface 5, which has a force component which depends on the angle between the propulsion force of the original and the guide surface and which ensures that the original 14 is around its Contact point with the ball 8 is rotated counterclockwise while the original moves forward. This means that no excessive frictional force is generated because at least one surface of the original is transported by the ball 8 and the original 5, as described above - according to the force component generated thereby, that the original rests on the guide surface 5, moves forward and at the same time in Rotates counterclockwise. Further, one of the means for applying a driving force to the original has no rotating shaft and the contact area is small so that the original can slide between the ball 8 and the holding plate 6. Therefore, even if the original is made of thin paper such as airmail paper, the right side edge of the original can finally be brought to the guide surface without deforming the original.

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Due to the sequence of events described above, the original 14, the end portion 21 of which is in contact with the guide surface 5 stood, gradually brought into contact with the guide surface 5 with its right side edge, and then the ball 8 slide without an axis of rotation and that; Original and the original 14 along the guide surface for;. Roller 15 transported. At this point the pre- " whose edge of the original is parallel to the slot 11 of the reading section so that the original is between the rollers 15 and 16 in aligned position is drawn into the nip.

If the start of reading needs to be synchronized with another section while the original is to slot 11 is brought, the roller 15 can be temporarily stopped so that the original between this roller 15 and the registration device bends slightly and thereby brings the front edge of the original even better parallel to the slot 11 will.

In order to increase the original transport force of the alignment device constructed above, the diameter of the ball 8 can be increased or the surface of the ball can be provided with rubber or made concavo-convex in order to increase its frictional force. However, if this makes the transport force too strong to allow a sufficient amount of sliding between the ball and the original, the transported original can sometimes be folded or wrinkled and thereby damaged, and such damage to the original would be particularly pronounced if the original is thin.
30th

Another embodiment of the original conveyor of the alignment device described above is explained below.

Figure 4 shows a combination of a drive roller 22 and

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a ball 23. In this figure, reference numeral 24 denotes a drive shaft of the roller 22. An original 25 is arranged between the roller 22 and the ball 23, and this ball 23 presses the original against the roller 22 to make the original according to the rotation of the Roll 22 transported
will. In this device, the support of the ball
23 effected by a plate-like element 26 similar to the holding plate according to FIG. 1, and this element has a concave region in which the ball 23 is arranged. In Figure 4, reference numeral 27 denotes a table on which the original 25 can be placed, and denotes a
Arrow 28 shows the space which is formed between the concave area and the ball 23. In order to increase the original fan transport force, the surface of the roller 22 in this embodiment can be machined so that it has a high
Has coefficient of friction, or may be the weight of the ball
23 itself be increased. If the original is thick, the
Ball 23 by a distance corresponding to the gap 28
be raised to enable the original to be transported. Of course, in that, similar to the embodiment according to FIG. 1, the plate-like element 26 is made liftable with respect to the original support table 27, it is possible to convey a thick original.

Fig. 5 shows a modification in which the surface of the lower roller 22 shown in Fig. 4 is covered with urethane rubber or the like to thereby provide a spherical surface. In this case, the original may well differ from the
Surface friction layer 29 are transported while also the original and the ball 23 and the friction surface 29 are in point contact so that the original can sufficiently slide between the ball 23 and the friction layer 29, thereby ensuring that the above-described
Alignment process is running.

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Figure 6 shows an embodiment in which the positions of the roller 22 according to Figure 5 and the ball 23, which the original presses against this role due to their weight, are interchanged. In this embodiment, a coil spring is used 30 to press the ball 23 against the roller 22.

In order to produce the device, which is shown as an exemplary embodiment in FIG. 5, a steel ball was used as the ball, the diameter of this steel ball was 12 mm (about 7 g) to 16 mm (about 16.7 g). Urethane foam and urethane rubber were used for the surface of the lower roller, and the portion of the roller that adheres to the Ball rests, was shaped spherical. It became an attempt at transport performed with an original while the lower roll is at an angle of 20 ° to 30 ° with respect to the Baffle was rotated. A good result was achieved with regard to the alignment function and the transport function Achieved for originals in a range from very thin originals such as airmail paper to very thick Originals on the order of 4 30 μΐη. The height S of the Guide surface (Figure 1) is preferably of the order of 1.5 to 3 mm. The reason is that in the case of a thin original such as airmail paper, if the height S is large, the right edge portion of the original tends to curl when it hits the guide surface meets so that a good aligning effect cannot be expected. It is also useful if the areas of the original support table, the guide surface and the top cover section of the original support table (corresponding to 6 in FIG 1) that touch the original are integrally formed to eliminate any gap between them. Of the The reason is that if there are gaps in these places, especially the end edge of a thin original in could get into this gap and cause damage or sticking of the paper.

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A comparison of the device according to FIG. 5 with a device according to FIG. 4 showed that the device according to Figure 5 empirically has a higher alignment effect. The reason for this is considered to be that that area of the surface of the lower roller that touches the ball consists of a high friction element and that at the same time Cross-section describes an arc of a circle. It is believed that this will sufficiently transport the original and then, if necessary, rotated without load. The example according to FIG. 5 has alignment devices shown the best effect according to Figures 1 to 6.

In each of the embodiments described above the roller and the ball are arranged so that they the original at an angle of 15 ° to 45 ° with respect to the guide surface transport as shown in Figure 3, and this angle is variable with the quality of the paper Originals. In order to ensure smooth transport of both thin originals and thick originals, this angle should be preferably an acute angle on the order of 20 ° to 30 °. Furthermore, the alignment device can so be designed that several such devices depending on the size and weight of the original on the original works.

In the device described above, the ball and the counter-element are constantly in contact with one another. In order to bring an original between the ball and the counter element, the ball side must therefore counter the weight of the Ball itself or a spring force are raised or the counter element must be raised in a corresponding manner. Compared to the conventional alignment device in which rollers are arranged opposite one another, allows this is the insertion of an original in an easier way with much less force. To make the function even further

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improve, however, in the device according to the invention the ball and the counter element arranged so that they - are not in contact with each other while an original is being inserted.

That is, before the introduction of an original, the gap between the ball and the counter element such as a drive roller is held to be larger than the thickness of an original sheet and that after the insertion of the original this is felt and the sheet original is transported by being between the ball and the Counter element is clamped. During this transport, the ball is supported so that it is within a limited range Area is rotatable relative to the counter element in any direction and that when the end portion of the Sheet originals hit the guide surface and this original experiences the resistance from the guide surface, the direction of transport can be easily changed. When the sheet original is aligned in a certain direction with respect to the reading section and, for example, has been transported into a certain position, the gap between the ball and the counter-element manufactured again so that it is ready to receive a next original sheet to be inserted.

Figure 7 is a perspective view showing the original transport section of the facsimile apparatus according to the invention to which the above is applied. FIG. 8 is a cross section through the device according to FIG. 7 in the original conveying direction, and FIG. 9 is a plan view to the device according to FIG. 8. Elements that correspond to elements of the device described in connection with FIGS. 1 to 3 match are denoted by the same reference numerals. 31 denotes a roller which is the counter element of the invention forms, and this is driven by a shaft 32, so that an original in the direction of an acute angle with a guide

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plate 4 is transported. 33 with a magnetic metal ball is referred to, which during the transport of the original in Contact with the roller 31 is. At 34, an electromagnet for lifting the ball 8 is designated so that during the Non-transportes a gap between the ball 8 and the

Role 7 consists. The alignment of the original takes place in that the original passes between the ball 33 and the roller 31. Denoted at 35 is an original detector for detecting the insertion of the original. 10

In the following, with reference to FIGS the device training according to the invention and the process at Alignment of the original described.

In the state in which the main switch of the facsimile machine is closed and the insertion of an original is expected, the ball 33 is in the raised position by the electromagnet, which is automatically excited by the closing of the main switch, so that a gap between the ball 33 and of the roller 31 larger than the thickness of the original is present. When the original 14 is inserted into this gap, the detector 35 detects the presence of the original and the current to the electromagnet 34 is interrupted by a control mechanism, not shown, so that the electromagnet 34 loses its magnetic force and allows the ball 33 to open to drop the roller 31 and pinch the original 14 between the ball and the roller 31. The result is that the roller 31, the rotating shaft 32 of which is not mounted parallel to the direction of the slot 11 of the reading section, as shown, the angle 0 between the normal of the shaft 32 and the guide surface being an acute angle of 20 ° to 30 ° causes the front end of the original to hit the guide surface at a certain angle. In addition, the shaft 32 is connected to the rotatable shaft of a motor 13 which is a drive source

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forms, via a universal joint 12 with a helical spring tied together. In the above-described configuration, when the motor 13 rotates counterclockwise, the roller 31 becomes rotated in the direction of the arrow so that it transports the original 14 in the direction of the arrow shown in FIG. If the right side 21 of the front end of the original 14 on the; Guide surface 5 (Figure 7) hits the guide plate 4, arises between: see the original and the guide surface 5 a resistance, and because of this resistance, the original 14 is moved forward, while it rotates counterclockwise around the point of contact between the original and the ball 8, so that the Original · finally between transport rollers 15 in one state is pinched in which the right side edge of the original 14 is in contact with the guide surface 5, i.e., a State in which the original is oriented at the desired angle. In this case the transport force is for that Original intermittent due to the up and down movement of the ball 33, so that a similar effect as in the case that a clutch mechanism is provided between the Ball and the drive source of the transport rollers 15 and 16 is inserted. If the detector 35 is finally not an original detects more, the electromagnet 34 is electrically energized so that it raises the ball 33.

Referring to Fig. 10, a holding mechanism will now be described described for the ball. The ball 33 and the electromagnet 34 are carried by a holder 36. A Electromagnet that works with a normal iron core 37 does not generate magnetic force when the current is applied to the electromagnet is switched off, so that then the ball 33 falls due to its weight on the roller 31 and that between the ball and the original 14 placed on the roller 31 is pinched due to the weight of the roller 31. If by winding the Electromagnet a current flows, the iron core 37 is magnetized, so that he has the ball 33 due to the magnetic force

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raises. At this point, there is a gap between the ball 33 and the roller 31, so that even a very thin one Original, such as airmail paper, can be easily inserted without being wrinkled. 5

Considerable energy is usually required to magnetize an electromagnet. In the inventive Original alignment device should have an original on the original platen can only be transported until the original is between the transport rollers 15 and 16 of the reading section is drawn in, and after that or during the waiting state, the original does not need to be transported will. This means that the period of time during which a gap between the ball 33 and the roller 31 is maintained is, is much longer than the time during which the ball is in contact with the roller, so that it it is more economical to apply electricity only when the ball is about to be dropped.

FIG. 11 is a front view showing an embodiment using an electromagnet in which a Permanent magnet serves as an iron core in order to meet the above-mentioned economic requirement. When the permanent magnet 38 is arranged such that, for example, the N-PoI is on the ball side, an electromagnetic coil 39 be wound in such a way that the S-PoI is on the ball side. If there is no current flowing, it is designed as a metal ball Ball 33 held raised by the magnetic force of the permanent magnet 38, so that the insertion of an original a-0 fan is. Then when a switch SW is closed and a current flows from a voltage source V, the magnetic force of the electromagnetic coil 39 and the magnetic force are canceled of the permanent magnet 38 on each other, so that the ball 33 falls due to its weight on the drive roller. if in this training the ball 33 directly the permanent magnet

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38 touches, the ball 33 does not easily separate from the permanent magnet 38 even if a current flows through the coil, hence a low magnetic permeability element . such as paper or a non-magnetic element 38a, for example, can preferably be arranged between the ball 33 and the permanent magnet 38. This training ensures that; the ball is reliably separated from the magnet even if; the balance between the magnetic force of the permanent magnet and the electromagnetic force of the coil is not exactly maintained. -

In the case of the invention, a device of the type usually used can serve as a detector device for determining an original is used as a paper detector device, for example a microswitch, a light sensor working with reflection or transmission, an ultrasonic sensor or a magnetic sensor.

When the ball is made of a magnetic material in this way and an electromagnet as the mechanism to hold it Serving the ball, both releasing and releasing control become easy while at the same time the construction can be simplified.

The following is an improved example of the electromagnet for attracting the ball described above describes an electromagnetic force.

Figure 12 shows a main cross-section through an improved electromagnet. In the figure, the reference numeral denotes 40 is a yoke, numeral 41 denotes an iron core, numeral 42 denotes a bobbin with a coil wound around it and reference numeral 43 denotes a front frame. The figure shows a training in which the coil core 42 is inserted into the yoke 40 and the iron

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core 41 is caulked with the yoke 40, which in turn is caulked with the front frame 43, so that there is a one- piece construction. The construction of this electromagnet differs from the conventional construction in that that portion of the iron core 41 which contacts the ball 44 has a spherical recess 41 a which is complementary to the outer diameter of the ball 44. This construction means that, compared with the conventional construction in which the iron core surface contacting the ball is flat, it has an advantage that the magnetomotive force for holding the ball can be made small. That is, by using a closed magnetic circuit including the iron core 41, the yoke 40, the front frame 43 and the ball 44, the effective magnetic flux that lifts and holds the ball 44 becomes large compared to the configuration, where the surface of the iron core that carries the ball is flat.

This is explained using an exemplary embodiment. If a comparison is made with regard to the magnetomotive Force required to move a steel ball with a diameter of 14.3 mm and a weight of approximately 11 g by about 1.5mm raises a magnetomotive force on the order of at least 120 ampere-turns than necessary in the construction in which the section of the iron core carrying the steel ball is flat, on the other hand a magnetomotive force on the order of only 90 ampere-turns is necessary when an iron core with a spherical recess is used, so that the required magnetomotive force by about 25% can be smaller. As has been empirically confirmed, it is on the magnetic circuit as a further measure to improve the efficiency of the electromagnet expedient, the gap T between the hole in the front frame 43 through that the ball 44 goes, and the outside diameter of the ball 44

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to minimize, as shown for example in Figure 13, which is a view in the direction of the Arrow A in Figure 12 is.

Fig. 14 shows a state in which the ball 44 is in contact with the iron core 41, and it appears that the magnetic efficiency is higher if the design is such that the center line 45 of the ball 44 is practical in this state the center of the plate thickness of the front frame 43 is. Of course, it is more advantageous to improve ^the: like effect of the magnetic circuit, a material with high magnetic permeability such as electromagnetic soft iron or, to use as a material for the manufacture of the yoke 40, the iron core 41 and the front frame 4. 3 It has been confirmed that even when cold-rolled steel sheet (SPC) is used, the residual stresses due to machining can be removed by using parts subjected to heat treatment at about 800 ° C, which is magnetically advantageous. 20th

As FIG. 13 shows, the guide 42a of the bobbin is designed so that it is slightly larger than the outer diameter of ball 44 and slightly smaller than the diameter of the hole in the front frame through which ball 44 passes. This leads the guide portion 42a moves the ball 44 up and down when the ball 44 is attracted by the electromagnet and is released and while the ball 8 rotates when an original is conveyed. If this guide 42a from a Material is made with good sliding properties, for example from polyacetal resin or polyamide resin, a unnecessary increase in the load, for example due to friction, can be prevented when the ball 4 4 moves. Since the Bobbin 42 is usually made of an electrically insulating material, fulfills the use of a Plastic material like the one mentioned above, also these

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Requirement. Regarding the concave recess of the iron core, it should be said that a concave portion other than has fully curved surface, but has several stepped sections and basically the diameter corresponds to the sphere, as shown in FIG

Iron core 46 can be formed. ;

By the device according to the invention described above the efficiency of the electromagnet can be increased more than that of the conventional device. Effects like the reduced power consumption of the device, the compactness of the electromagnetic device resulting from the reduced number of turns of the coil, and the reduced heating resulting from the reduced energy consumption results, as well as the correspondingly weaker temperature rise of the device can be achieved.

In the above-described ball retaining mechanism, which works with an electromagnet, it can happen that the Ball 44 does not fall even if the current supplying the electromagnet is cut off when an original is inserted. The tendency towards this is particularly pronounced when the power is turned off after the ball 44 has been held for a long time. A factor that acts as a reason can be considered that if the ball 44 has been held by the electromagnet for a long time, the magnetic ball 44 is magnetized during that time and some residual magnetism is still present in the sphere even after the power has been switched off so that it is difficult for the ball to separate from the iron core 41 of the electromagnet. ', This is a serious disadvantage in terms of the function of the original alignment device, since the original transport force is not generated when the ball 44 is not on the Role that forms the counter element, being the original

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is arranged in between.

Figure 16 shows a main cross section of an electromagnet section to improve the above disadvantage. In the figure, reference numeral 47 denotes a Layer of non-magnetic material, which is an integral part and in the form of a coating on the surface of the iron core 41 that contacts the ball 44 is provided. The purpose of this non-magnetic material layer 4 7 is to have the effect of causing the ball 44 held by the electromagnet to fall reliably, when the current to the electromagnet has been switched off. By providing such a layer 47, it becomes possible to ensure that the ball 44 falls properly even if the power is only turned off after the ball 44 had been held for a long time.

It has been confirmed by tests carried out within the scope of the invention that when a steel ball with a Weight of about 11g and a diameter of 14.3 mm is used as ball 44 and the improved solenoid with a magnetomotive force of about 90 ampere-turns and if, for example, a polyester film with an adhesive with a thickness of the order of 60 μ or a film made of PTFE (Teflon) with an adhesive with a thickness of the order of 100 microns than non-magnetic Material layer 47 is attached, the effect of which is great.

In addition, it has been found that under the above conditions, copper plating with a thickness of 15 µ, a painted urethane film with a thickness in the Of the order of 30 to 40 μ and a Teflon coating film with a thickness of the order of 25 to 30 μ one somewhat improved reliability in terms of

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fall of the ball 44 compared to the case that these substances are not used. However, even if such materials are used, reliability is poor falling down is sometimes insufficient if the ball has been held closed for a long time.

From the various obtained under the above conditions -_ results, the conclusion has been drawn ,: that a plastic film with a thickness of at least 50 μ best described as non-magnetic material layer 47 is suitable to cause the ball 44 reliably under these conditions falls down. One reason for this is that, in order to obtain a coating or the like having a thickness of 50μ or more, it is necessary to apply the fabric a plurality of times and that sophisticated manufacturing equipment is required to produce the coating. In contrast, a plastic film is suitable from the viewpoint of the uniformity of thickness, the viewpoint of ease of manufacture and the viewpoint of cost. A plastic film with a thickness on the order of 50 to 100μ is readily available commercially and therefore makes it easy to carry out the invention.

As the above-mentioned non-magnetic material layer, besides the above-mentioned polyester film and the PTFE film or Teflon film materials such as vinyl chloride film, polyamide film or polyethylene film are used in which it is a common plastic film. Other suitable non-magnetic materials include in addition to The resins specified above include non-magnetic metals such as aluminum, brass, copper, phosphor bronze, etc.

According to a further embodiment of the invention, hairs made of plastic (for example polyamide) with a Length of, for example, on the order of 0.1 in

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non-magnetic material layer on the surface of the iron core that attracts the ball to achieve a similar effect.

In Figure 16, the surface of the iron core 41, which has the; Ball 44 touches, a spherical shape that corresponds to the outer diameter of the ball 44. This is to enable:. the magnetomotive force with which the iron core with the: · spherical recess attracts the ball is effectively generated is, but the spherical shape does not this surface; should be considered a limiting condition; rather, one can flat surface lead to a similar result.

With regard to the shape of the non-magnetic material layer 47 which is attached to the iron core 41 of the exemplary embodiment according to FIG 16 is provided with the spherical recess, it should be said that this shape can be as shown in Figure 17, wherein several radial recesses are formed in a circular foil, so that the layer 47 see into one of the spheres Recess of the iron core 41 can be brought into a substantially complementary state.

FIG. 18 shows a further embodiment of the invention, which differs from the embodiments described above a non-magnetic material layer 48 is provided on the outside of the ball 44. When the bullet 44 is held by the electromagnet, the aforementioned effect of the invention can also be achieved in this case, since the non-magnetic material layer is formed between the ball and the surface of the iron core 41, which is the ball touched.

By in the manner described above according to the invention lightweight element is added can make for very reliable Attraction between the electromagnet and the magnetic

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tischera material made ball and for very reliable Falling of the ball can be provided, whereby the reliability of the original alignment device is greatly increased.

In the device according to the embodiment shown in FIGS. 7 to 10, the ball 33 is normally attracted by the electromagnet 34, while the original 14 is not inserted between the ball 33 and the roller 31. Thus, current is supplied to the electromagnet 34 even when ^:

no original is transported. This means a certain consumption of energy. As further with regard to the training; management example according to Figure 16 has been described 'loading'. there is the possibility of such a disturbance that the ball 33 does not fall gently when the power supplied to transport an original is turned off.

A method of overcoming this problem is described below with reference to Figure 19 which is a cross section through the device shows. In the figure, reference numeral 49 denotes an original detector which is associated with the apparatus according to Figure 8 is added. In the device according to FIG. 19, the ball 33 is normally on the roller 31. When an original 14 is inserted into the aligner is, the introduction of the original 14 is first detected by the detector 49 and the electromagnet 34 is due of the detector signal is energized so that the roller 32 is rotated. Because of this supply of energy, the ball becomes 33 is drawn to the magnet 34, whereby the insertion path is opened so that the original 14 is easily inserted into the between the roller 31 and the ball 33 formed space can be inserted.

Then, when the original 14 is further inserted, the following detector 35 detects the leading end of the original, whereupon he stops the energy supply to the electromagnet 34.

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The ball thereby falls on the roller 31 with the original interposed therebetween and starts the original feeding operation. The drive of the roller 31 can be started at this point in time. The drive of the roller 31 can be stopped: after it has been rotated a sufficient time to transport the original to the rollers 15, or it can be stopped whenever the detector 35 does not confirm the presence of the original. If the Rotation of the roller 31 is continued for a predetermined period of time, this can be done by means of a timing device being controlled. The energy supply to the electromagnet 34 is only resumed when the next original is detected by the detector 49. As a result, it is possible to reduce the period of time during which the electromagnet Energy is supplied to make minimal compared to the device according to Figure 8 and thereby the sticking of the To prevent ball on the electromagnet, which was described in connection with the embodiment according to FIG.

In an embodiment which achieves a similar effect, the detector 35 is not present and only the detector 49 is used, so that when this detector 49 is an original detects the electromagnet 34 energized to raise the ball and insert the original is facilitated. After a predetermined period of time has elapsed, the energy supply is cut off, so the ball falls on the original 14 and the roller 31. This specified time period is determined on the basis of the point in time to which the original is introduced from the detector 4 9 to the roller 31. This time period can also be set in a simple manner Wise done by means of a timing device. The control of the rotation of the roller 31 at this time can be be the same as in the example described above. The drive of the roller 31 at this time is at least continued until the front end of the original dies

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Rolling 15 has reached.

In the following, the construction that keeps the counter-element and the ball out of contact until an original comes in: .. is performed, an embodiment described which differs from the embodiments in which the Ball is attracted by the electromagnet. ■ ..-_

FIG. 20 shows a cross-section of an embodiment of the alignment device which has such a design that. the level of the roller with respect to the ball that can be rotated at a certain point can be displaced. In Figure 20 are parts that are also present in Figure 8, denoted by the same reference numerals.

In the figure, reference numeral 50 denotes a roller which can be raised and lowered relative to a ball 51. The roller 50 can be rotatably driven by a shaft 52 in such a direction that an original under a pointed Angle with respect to a guide plate 4 is transported, and is arranged on a lever 53, which about the axis 52 is rotatable. In this way, the lever 53 can be pivoted about the fixed axis 52. One end of the lever is with the Tie rod 55 of a plunger coil 54 is connected. The ball is denoted by 51, which has no axis of rotation and which, if it is driven, according to the movement on the part of the Drive source is rotatable and which contacts the roller 50, wherein an original 14 is arranged therebetween during operation is. A Paoier detector is designated at 35 for the festival.] J.uncj dos K.tnführons of an original between the ball and the role.

The device training according to the invention and the method, according to which an original is fed, will now be made with reference to Figure 20, which is a sectional view of the facsimile

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device, and is described on Figure 21 which is a top plan view of the device. In the standby state before an original is transported, the roller 50 is retracted from the original platen 1 due to its weight, and ^{: there} is a gap between the roller 50 and the ball 51 which is ^: greater than the thickness of the original. When the original 14 is inserted into this gap, the paper detector 35: detects the presence of the original and a signal is generated by a control circuit (not shown) so that the tie rod 55 of the plunger coil 54 is pulled to the right. As a result, the lever 53 is pivoted counterclockwise in FIG the ball holds. The ball 51 is designed not to fall below a certain predetermined position due to the convex portion of the support portion. As shown, the rotatable shaft 56 of the roller 50 is arranged non-parallel to the direction of the slot 11 of the reading section 2, the angle Θ enclosed by the normal of the shaft 56 and the guide surface being an acute angle of 20 ° to 30 ° . The shaft 56 is connected to the rotatable shaft 13 of a motor serving as a drive source via a universal joint 12 having a coil spring or a belt to be described later. In the above construction, when the motor rotates, the roller 50 is rotated in the direction of the arrow and the original 14 is transported in the direction of the arrow shown in FIG. The right side 21 of the front end of the original 14 abuts against the guide surface 5 of the guide plate 4, and a resistance is created between the original and the guide surface 5, by which the original 14 while rotating counterclockwise around the point of contact of the original with the ball 51 is moved forward until it is finally between the transport rollers 15 in a state

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is drawn in, in which the right side edge of the original 14 is in contact with the guide surface 5, namely a State in which the original is oriented at right angles to the slot. :

"The following is an embodiment of the holding mechanism of the role section is described in detail. ■

Figure 22 shows a side view of the roller section retaining mechanism; where the upper edge of the figure is the original support surface, and Figure 23 is a view according to the arrow, A in Figure 22.

A gear 57 is the drive-side gear and is at Viewing rotated clockwise in Figure 22. A gear 58 meshing with the gear 57 turns counterclockwise rotated on the fixed axis 52, and in the same direction a pulley portion 59 is rotated, the integral with the gear 58 is. Around the pulley section 59, a rubber belt 60 is stretched around a pulley 6 2 is guided on the roller shaft 56 and over a pulley 61 which changes the belt direction. The pulley 62 is mounted on roller shaft 56, and roller 50 is mounted on roller shaft 56 so that roller 50 is counterclockwise is rotated in Figure 22 due to the power transmission through the rubber belt 60. That direction is that same as the direction in which the original is fed. By choosing the diameter of the gear 57, the gear 58, the pulley 59, the pulley 62 and the roller 50 can set the peripheral speed of the roller 50 optionally can be set so that in this way the speed at which the original hits the feed rollers can be adjusted 15 is supplied.

The roller shaft 56 is supported by bearings 63 and 64

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rotatably mounted, which in turn are carried by holders 65. Furthermore, the entire roller section is carried by a lever 53 which is rotatable about the fixed axis 52. on the other hand is the other end of the lever 53 with the tie rod 55; connected to the plunger coil 54 by means of a pin 66. At 67; denotes a plate for regulating the stroke of the and movement of the roll. This plate is designed so that when it is moved in the direction of an arrow B. the roller 50 is raised far. Designated at 68 is a shock absorber material, for example rubber, for absorbing of the shock during contact with the regulating plate 66 with the holder 65. Designated with 69 is a base plate on which the said parts sit.

The following is the operation of the above-described Wise trained roller holding mechanism explained with reference to the drawings. In the illustrated In the standby state, the roller 50 is lowered in the direction of an arrow C due to its weight and it takes its standby position with the outside of the roll retracted from the original platen. At this time the roller section can be biased downward by using a spring if necessary.

When an original is inserted, as already described, and when the original is detected by the paper detector 35 is, a signal from a control circuit to the plunger coil 54, so that the tie rod 56 of the plunger coil in Is pulled in the direction of an arrow D and the lever 53 coupled thereto counterclockwise (Figure 22) around the fixed Axis 52 is pivoted so that the roller 50 protrudes somewhat from the original support surface and thus a transport device forms. The extent of this protrusion can be adjusted by means of the regulating plate 67, as already described became. Research shows the extent of this

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Projection is preferably of the order of 0.5 to 2 mm for the transport of the original. During the upward movement this role, the drive gear 57 can be rotated continuously, or the drive can be at the time when the paper detector detects the paper. While the roller 50 is moved upward in this way, the upper peripheral surface of the roller 50 lifts the ball 51 slightly that cannot fall over a certain amount, as is also shown in FIG. 4, and transports that between the original present in the roller 50 and the ball 51 in such a direction that the original is aligned.

As is apparent from the above description, the invention is an apparatus in which an original is held between a ball and a roller arranged opposite this, thereby aligning the original and in which there is a gap between the ball and the counter member while the original is being inserted so that the insertion of the original can be carried out easily. The invention thus facilitates handling of the original by the user, and in particular it enables even very thin originals to be reliably aligned will.

The next embodiment according to FIG. 24 is one in which a ball moves up and down relative to a stationary roller is moved away. In the figure, the reference numeral 70 denotes a drive roller, which one of the function of the roller 31 according to Figure 8 fulfills a similar function, and the reference numeral 71 designates a ball, which in the manner shown on a bracket 72 is supported, i.e. is arranged in an opening, the inner diameter of which is slightly smaller than that Diameter of the sphere is. In the device according to this embodiment, the holder 72 takes, while on the Insertion of an original is waited, their with extended

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NEN lines a position shown so that a gap is present between the roller 70 and the ball 71 and thereby the insertion of an original is facilitated.

A current ■ presence of the original has been confirmed by the explained in connection with Figure 8 detector 35 is applied to a moving coil 73, so that it a tie rod ^74::, is after the during the introduction of an original 81 draws in the direction E. Thereby, the holder 72 is lowered into its position shown in dashed lines so that ^the: ball 71 is seated on the reel 70th The extent of the; Downward movement of the holder 72 is set to a value greater than the amount of downward movement of the ball 71, so that the opening portion of the holder comes in an area of the surface of the ball where the diameter is smaller, so that the ball 71 in relation to Rotation of the roller is freely rotatable.

The energy supply to the plunger coil continues as long as the detector 35 according to FIG. 8 detects the presence of the original, and is terminated afterwards. When the energy supply is ended, the holder 72, which has been reversed until then, in the direction of the arrow was under tension, returned to its position shown in solid lines. The preload direction may be a coil spring or the like that normally pushes or pulls the bracket 72 upward. The role 70 can be rotated as long as the detector 35 detects an original. The ball can be supported in the form of point contact instead of in the form of a line contact, in order to reduce the frictional force on the bracket.

FIG. 25 shows an embodiment in which a ball 75 is not moved up and down relative to a roller 76, but is moved in one plane. In a first example, the holder 77 of the ball is moved around a shaft 78

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turns. In this exemplary embodiment, the ball 75 is at the level of the dashed illustration according to FIG. 24 relative to the Role 76 set. While waiting for an original to be inserted, the ball takes the dashed line * Position 75a. When an original is inserted and the detector 35 described in connection with FIG. 8 indicates its presence of the original, a rotating coil 79,: attached to the rotatable shaft 78, is energized: feeds, so that the coil 79 rotates the holder 77 against the force of a spring 80 in the counterclockwise direction G to the Bring the bracket into the position shown with solid lines. This will move the original started to align the original.

When the original is no longer at the detector 35, the energy supply to the coil 79 is interrupted and the holder rotated by the spring force in the direction of an arrow H to return it to its original position.

In a twentieth example, the mount of the sphere Moved parallel instead of rotating, in which case a plunger can be used. During the insertion of an original in this case the ball 7 5 occupies the position 75b shown in dashed lines, and during During the transport for alignment, the ball is moved into its position shown with solid lines. The ball 75 is moved in the direction of transport of the original, with the ball being moved on the original and drawn into its with it Lines shown position is brought, so that the likelihood of damage to the original is reduced.

Also in this embodiment, in which the ball in a plane is moved, needs as in the embodiment according to Figure 24, in which the ball moves up and down the bobbin only during the transport of an original

DE 0866

ginals to be fed so that the energy consumption is minimal. Furthermore, no electromagnet is used to hold the ball up and down so that the material of the ball is not subject to any restrictions. Furthermore, the training can be so be that while waiting for the introduction of an original, the holding plate 6 according to Figure 1 slightly above the level the ball is raised and that this leverage is removed when the presence of an original is detected is so that the holding plate 6 rests on the ball.

130616/0037

Claims (1)

Claims 1. Original alignment device for automatic alignment
of a sheet-shaped original in a correct direction so that when the original is transported to a reading section which reads the image information of the original, the original is in the correct direction with respect to the reading section
is supplied,
marked by a ball (8, 23, 33, 44, 51, 71, 75) without a special axis of rotation, which, when applied from the outside, a driving force
acts, one of the driving force, executes the following rotation,
a counter element (6, 22, 29, 31, 50, 70, 76) for holding a sheet-shaped original (14, 25, 81) between them and the ball, an original guide surface (5), which is in a sub at right angles to the reading section (11). direction is provided, and means (7, 10, 13, 24, 32, 60) for driving the ball or the counter-element in one direction, in which the original transported by the interaction of the ball and the counter element against the guide surface bumps. Deutsche Bank (Münchon) KIo 51/61 070 130616/0037 304U10 DE 0866 2. Original alignment device according to claim 1, characterized in that the counter element is a rotatable element (22, 29, 31, 50, 70, 76) which rotates in that it is driven. 3. Original alignment device according to claim 1, characterized in that that the device means (34, 38, 39, 41, 46, 54, 73, 79) having a gap between the ball and the counter element form while that? Oriqina] between the ball and the counter element is introduced. 4. Original alignment device according to claim 3, characterized in that that the means forming the gap form it in that the ball is in a plane or perpendicular relative to the counter-element is moved. 5. Original alignment device according to claim 4, characterized in that that the means forming the gap are a magnetic device (34, 38, 41, 46) which the ball by magnetic force attracts. 6. Original alignment device according to claim 5, characterized in that that a non-magnetic element (38a, 47, 48) is interposed between the magnetic means and the ball. 30th 7. Original alignment device according to claim 5 or 6, characterized in that that the magnetic device has a recess (41a) which corresponds to the outer diameter of the ball. 35 130616/0037 304U1Ö DE 0866 8. Original alignment device according to claim 5 or 6, characterized in that that the magnetic device consists of an electromagnet and that the electromagnet is always supplied with energy so that it lifts the ball and forms a gap, and that the supply of energy is interrupted if one Original detector device (35), which is arranged in the transport path behind the magnetic device, the Original detects so that the ball falls down on the counter element with the original interposed therebetween. 9. Original alignment device according to claim 5 or 6, , characterized in that the magnetic device consists of an electromagnet and that the original detector devices (35, 49) are arranged in the transport path in front of and behind the electromagnet and that when the detector device (49) arranged in front of it detects the original, the electromagnet is fed with energy so that the ball is lifted from the counter-element, and that when the arranged thereafter Detection means (35) detects the original, the supply of energy to the electromagnet is stopped so that the ball falls onto the counter element, with the original being arranged therebetween.
25th 10. Original alignment device according to claim 3, characterized in that that the means forming the gap thereby form a gap in that the counter-element is moved relative to the ball. 130616/0037 _ΛΛ 304U10 POSITION LIST for registration. DE 0066 / _Q \ 1 Original AuflaaeflMchfi 2 Original reading section 3 Cover of the original reading section 4th Guide plate 5 Guide surface of the guide bar 6th Retaining plate as a counter element 7th Friction roller 8th Bullet- 9 hinge 10 Shaft of roller 7 11 Slot ^: 12th 'Universal joint 13th engine 14th original 15th Transport roller 16 Transport roller 17th Original lighting lamp 13th Reflective mirror 19th Imaging lens 20th CCD element 21st End section of the original 22nd Drive roller 23 Bullet 24 Roller 22 drive shaft 25th original 26th Plate-like element 27 Original support table 28 Space 29 Roller 22 friction layer 30th Coil spring 31 Role as a counter element 32 Shaft of roller 31 33 Magnetic metal ball 34 Electromagnet 35 Original detector 130616/0037 POSITION LIST for registration DE 0866 (10) 36 Holder for electromagnets 34 37 iron core _:. 33 permanent magnet _; 33a element with low magnetic permeability 39 Electromagnetic Coil ' 40 yoke; ; ■ 41 iron _core; 42 bobbin with bobbin 4 2a guide for bobbin 4 2 43 bezel _: 44 ball ' 45 'center line . __ 4 6 iron core 47 Layer of non-magnetic material 43 layer of non-magnetic material 49 original detector 50 roll ,. · 51 bullet 52 axis of roller 50 5 3 levers '' 54 moving coil \ 55 tie rods _i 56 Rotatable shaft - ■. 57 gear _; 53 gear, meshing with gear 57 59. Pulley section 60 rubber straps _. . 61 Pulley to change the direction of the belt 60 62 Belt pulley attached to roller shaft 56 63 Bearing for roller shaft 56 64 bearings for roller shaft 56 \ __ 65 holders 66 pen 67 Movement regulating plate 68 Shock absorbing material 130616/0037 304U10 POSITION LIST for registration DE 0866 (H) 69 Base plate 70 Drive roller 71 Bullet 72 Bracket for Kuq <\ l. 71 73 Diving room Ic; · 74 Tie rod of the diving column 73 75 Bullet 75a Position of the ball ■ 7 5b Position of the ball 76 Role ' 77 Bracket for ball 75 78 Rotatable shaft 7.9 Moving coil 80 feather 81 original 82 83 3 4 85 Λ Bewecmncfsrichtunaspeil B. Movement direction.il C. Direction of movement arrow D. Direction of movement arrow E. Direction of movement arrow F. Direction of movement arrow G Direction of movement II Direction of movement of the. S. height SW counter T Intermediate roughness between hole and ball 44 V Voltage source - 130616/0037