WO2017190169A1

WO2017190169A1 - Aligning an article in sheet form

Info

Publication number: WO2017190169A1
Application number: PCT/AT2017/060114
Authority: WO
Inventors: Hubert Haselsteiner
Original assignee: Hubert Haselsteiner
Priority date: 2016-05-04
Filing date: 2017-05-04
Publication date: 2017-11-09
Also published as: AT15693U1

Abstract

The invention relates to an apparatus for aligning an article (1) in sheet form, with at least one straight sheet edge (2), at a given line (5), comprising at least one infeed table (3) for the article, devices for the linear movement and rotation of the article (1) in relation to the infeed table (3) and sensors (9) for determining the relative position of a straight sheet edge (2) with respect to a given line (5), wherein the apparatus is characterized - in that at least one first holding element (6) for an article (1) in sheet form is provided, which element can be moved perpendicularly with respect to the given line (5) and parallel with respect to the plane of the infeed table (3) and can be rotated about an axis perpendicular to the plane of the infeed table (3), - in that at least one second holding element (7) for an article (1) in sheet form is provided, which element can be moved along a circular arc (20) parallel with respect to the plane of the infeed table (3), and - in that at least one sensor (9) is provided on the infeed table (3) in order to measure an alignment of a straight sheet edge (2) of an article (1) in sheet form with respect to the given line (5).

Description

ALIGNING A PLATFORM OBJECT

FIELD OF THE INVENTION

The present invention relates to a device for aligning a plate-shaped object, with

at least one straight plate edge, on a predetermined line, comprising at least one Zustelltisch for the

Object, linear motion devices and the

Rotation of the object relative to the Zustelltisch and

Sensors for determining the relative position of a straight

Plate edge to a predetermined line. Furthermore, the present invention relates to a method for aligning a plate-shaped object. The invention is particularly useful for aligning a glass plate.

STATE OF THE ART

For the application of colors to plate-shaped objects, it is necessary to accurately align the plate-shaped objects on a support surface, so that by means of linear

movable screens, inking rollers or other

Application facilities, in particular in the context of screen printing, rolling or spraying, color can be applied to the desired locations. Patterns of straight lines should e.g. in the desired shape exactly parallel to a plate edge of a rectangular glass plate. Such

Device for aligning is known for example from the utility model AT 13.360 U.

It is an object of the present invention to provide a

to provide an alternative device for aligning a plate-shaped object. PRESENTATION OF THE INVENTION

According to the invention, a device of the beginning

characterized type characterized

- That at least a first holding element for a

plate-shaped object is provided, which is normal to the predetermined line and parallel to the plane of the Zustelltischs movable and about an axis normal to the plane of

Rotatable delivery table,

- That at least a second retaining element for a

plate-shaped object is provided which is movable along a circular arc parallel to the plane of the Zustelltischs, and

- That at the Zustelltisch at least one sensor is provided to align a straight plate edge of a

plate-shaped object to measure the predetermined line.

The default line can be a line or edge of a

Be bearing surface on which the plate-shaped object during processing, such as when coating with paint,

rests. To be able to process especially large glass plates, one needs a Zustelltisch to the

Support device, in particular flush, connects and supports the plate-shaped object. In order to move a glass plate on this feed table problems, the Zustelltisch is preferably designed as a Luftkissentisch.

To the glass plate particularly efficiently and exactly on the

To move Zustelltisch and to be able to position relative to the predetermined line is in the inventive

Device provided a first support member which supports the plate-shaped object in the center and moves to the predetermined line. Fixing the

Item can be with one or more suction units

happen. In addition, the first holding element the Also rotate the object in a plane parallel to the plane of the infeed table, around a straight plate edge

to align parallel to the given line.

For large and therefore heavy plate-shaped

Objects, the rotation can not be accomplished alone with the first, centrally acting on the object holding element, so that a second holding element is provided as an auxiliary device for the rotation. This second holding element is movable in or parallel to a plane of the Zustelltischs along a circular arc, in particular a semicircle, whose center lies on the linear movement path of the first holding element. In order to rotate simultaneously with the first and second holding element, the first holding element with its axis of rotation in the center of the arc of the second

Retaining element to be brought. The second holding element can be designed to be movable normal to the plane of the Zustelltischs. Thus, it can be lowered so far, for example, in purely linear movement of the first support member, that it does not hinder the movement of the object. The second

Holding element may essentially consist of one or more

Suction units exist, which are movable along a circular arc.

It can only the first holding element a rotary drive

have, or only the second holding element. Or it can each have a rotary drive first and second holding element, the rotary actuators must then be synchronized.

First and second retaining element are also used to align different edges of the article by turning to the predetermined line, in rectangular

Plates thus e.g. by turning 90 ° or 180 °. Thus, e.g. successively color stripes along different

Edges of a glass plate are applied, even if the Paint application device can only work in a certain area of the support surface. In this case, the glass plate does not have to be moved by hand during the corresponding alignment processes, but is moved with high precision by a motor. An embodiment of the invention provides that, in addition, a third holding element is provided for a plate-shaped object which, like the first holding element, can be moved normal to the predetermined line and parallel to the plane of the Zustelltischs. This allows the linear movement of the

Be supported to the given line if the object is a large dimension parallel to the

having predetermined line. The third holding element may additionally be designed to be movable normal to the plane of the Zustelltischs, so that it can be lowered, for example, to release the object during a rotational movement. The third holding element can also suction for the

Fix the article have.

It is conceivable that the at least one sensor is a camera with an evaluation device, wherein the camera images both the plate edge and the predetermined line and determines therefrom the position of the plate edge to the predetermined line. In a preferred embodiment of the invention, however, at least two sensors are at the Zustelltisch,

in particular similar sensors provided. The at least two sensors on the Zustelltisch are arranged in a preferred embodiment along the predetermined line. In this case, the number of sensors and their distances is dimensioned so that plate edges of different expected length can be detected at least two points.

It can be provided that at least one sensor

(In particular, all sensors) is designed as a mechanical position sensor (are), with a linearly displaceable Measuring part, which after contact with a plate edge through the plate-shaped object along a measuring path

is displaceable. The sensors are stationary and can be firmly connected to the Zustelltisch and / or the support surface.

The measuring part may have a stop for a plate-shaped object which can be moved normally to the plane of the delivery table, so that the stop lies below the level of the plate

Zustelltischs is lowered and a plate-shaped object is slid over the sensors, if no measurement of the

Distance of a plate edge from the given line

he follows. This ensures that the item is from the

Delivery table over the given line on the

Support surface can be transported. In this way, the sensors also do not hinder rotation of a particularly long object, e.g. 90 ° by means of first and second holding elements.

For this purpose, it can be provided that the stop is connected to a cylinder piston that can be moved normally to the level of the Zustelltischs.

The measuring part itself can also have one (thus further)

Cylinder pistons include, parallel to the plane of the

Zustelltischs and normal to the predetermined line along a measuring path is displaced. If the plate edge hits the stop of the sensor, the measuring part is displaced and the displacement, ie the length, is measured directly.

The inventive method for aligning a

plate-shaped object with at least one straight

Plate edge on a predetermined line, using a device according to the invention, comprises the following steps:

Placing a plate - shaped object on the first holding element and linear method of parallel to the plane of the Zustelltischs oriented object to the given

Line, with a transport speed,

- Reduce the transport speed of the first

Holding element to a search speed from a

predetermined normal distance of the straight edge of the plate from the given line and continue the method of

Object until, as measured by a sensor, the straight edge of the plate reaches the predetermined line at one point,

especially one of the sensors contacted,

- Reduce the search speed to one

Measuring speed, continuing the process of the object and measuring the distance traveled by the plate edge until the straight plate edge has reached the predetermined line according to the measurement of all sensors,

Turning the article with the first and / or second

Holding element, if the measured distances of the sensors are different sizes until the sensors detect an equal distance, in particular no distance, the plate edge of the predetermined line. When using only one sensor, such as a camera, simplifies the process, because only with an image on which the plate edge and the predetermined line are shown, can be determined at a certain time, how large the rotation of the object with the first and / or second retaining element must be.

BRIEF DESCRIPTION OF THE FIGURES

The invention will now be explained in more detail with reference to exemplary embodiments. The drawings are exemplary and are intended to set forth the inventive idea, but under no circumstances

narrow down or even finish playing.

Showing: Fig. 1 is a plan view of a device according to the invention, on which a glass plate is placed

Fig. 2 shows the device of Fig. 1 with the glass plate on

Measuring tape aligned Fig. 3, the apparatus of Fig. 1 with the glass plate near the predetermined line

Fig. 4 illustrates the situation of Fig. 3 with the second holding member prepared for rotation

Fig. 5 shows the situation of Fig. 3 with rotated by 90 °

glass plate

Fig. 6 shows the situation of Fig. 5 with the tape measure shifted

glass plate

7 shows the situation according to FIG. 2

Fig. 8 shows the situation of Fig. 7 with the glass plate already closer to the predetermined line

Fig. 9 shows the situation of Fig. 8 with the glass plate already at a position on the predetermined line

Fig. 10 shows the situation of Fig. 9 with the glass plate already at all points on or already behind the predetermined line

Fig. 11, the situation of Fig. 10 with the glass plate rotated parallel to the predetermined line

Fig. 12, the situation of FIG. 11 aligned with the glass plate parallel to the predetermined line and moved behind the predetermined line

Fig. 13 is a side view of a sensor

14 is a plan view of the sensor of FIG. 13th G. FIG. 15 shows a plan view of the sensor from FIG. 13 with the regions of different speeds of FIG

glass plate

WAYS FOR CARRYING OUT THE INVENTION

Fig. 1 shows an apparatus according to the invention for aligning a glass plate 1 with a straight plate edge 2. Die

Device comprises a Zustelltisch 3 and a

Support surface 4, on which the glass plate 1 can be placed, such as to apply paint, with a

Paint application device which is movable in the area above the support surface 4.

If very large glass plates 1 are to be processed, there is a risk that they will not be adequately supported by the support surface 4 and tilt. Therefore, it is particularly for very large glass plates 1, for example, have dimensions of 6 m x 2.8 m or even greater, it is advantageous to provide a Zustelltisch 3. The Zustelltisch 3 here connects to the support surface 4 flush, so

Support surface 4 and 3 Zustelltisch a flat surface

form. The level of Zustelltisches 3 thus corresponds to the continuation of the support surface 4. To the glass plate 1 on this surface or level of Zustelltischs 4 easily

To be able to position, the Zustelltisch 4 is preferably designed as Luftkissentisch so that the glass plate 1 can slide on an air cushion over the Zustelltisch 4.

Once the glass plate 1 is completely over the Zustelltisch 3, it can be roughly aligned by the user. For this purpose, first of all a mechanical stop, for example connected to a measuring tape 16, can be raised, on which the glass plate 1 is manually applied with an edge. The glass plate 1 should come to lie as centrally as possible with respect to the first support member 6, to which the tape measure 16 is taken to help.

As a result, the glass plate 1 can be highly precisely aligned by means of the first holding element 6 linearly

predetermined line 5 are transported, for example by means of a conveyor belt which extends below the level of Zustelltischs 3. The first holding element has to fix the

Glass plate 1 during the linear feed and while turning four square and arranged the axis of rotation

Suction elements 15 on. Two further suction elements 15 are mounted at a distance from the four about the axis of rotation

Suction elements 15 attached, which serve only the fixation during the linear movement and can be brought out of engagement with the glass plate upon rotation of the glass plate 1.

The third holding element 8, here consisting of three in

Transport direction (from left to right running in Fig. 1) successively arranged suction elements 15, because of the large length (from top to bottom measured in Fig. 1) of the glass plate 1 is also used to fix the glass plate 1 and support and linear to transport towards the predetermined line 5. When turning the

Glass plate 1, these three suction elements 15 can be brought out of engagement with the glass plate 1. The third holding element 8 with its three suction elements 15 can also be moved by a conveyor belt extending below the level of the Zustelltischs. Here are the

Transport belt of the first 6 and the third 8 holding element usually - for example via a common motor / gear unit - synchronized. For large-sized glass plates 1 with dimensions of up to 6 mx 2.8 m or more, the second holding element 7 is additionally used when turning. For aligning smaller glass plates with dimensions typically between 1.2 mx 1.2 m and 0.305 mx 0.305 m, the rotation of the glass plate 1 can also be accomplished by the first holding element 6 alone.

The second holding element 7 here has two suction elements 15, which are arranged one behind the other with the second holding element 7 along a semicircle 20, which approximately by a corresponding

Recess of Zustelltischs 3 is formed, are movable. Also for these suction elements 15 is provided that these can be brought out of engagement with the glass plate 1, if no rotation takes place. The center of the semicircle 20 is located on the path of movement of the first support member 6, that the first support member 6 in a position with its axis of rotation with the center of the semicircle 20 can be brought into line and thus achieves a synchronous rotation of the first and second support member 6 6 can be. The normal distance of the third holding element 8 to the first

Retaining element 6 and the distance of the second holding element 7 in its widest possible distance from the first holding element 6 are approximately equal.

Along the predetermined line 5, which are formed approximately by the longitudinal edge of the support surface 4 or the Zustelltischs 3 or can be set only abstract, four similar mechanical sensors 9 are distributed. A cover of the area of the support surface 4 is through an outbreak 21, the review of support surface 4 and 9 sensors free. The dotted circle indicates the area that the

Glass plate 1 at an at least half turn around the

Rotary axis of the first holding member 1 claimed. If no rotation of 90 ° or more is provided, the stops 12 of the sensors 9 (see FIGS. 13-15) can be extended and

be ready for measurement, ie above the level of

Zustelltischs 3 and the support surface 4 protrude, as shown here. Fig. 2 shows the device of Fig. 1, wherein the glass plate 1 is aligned with one of its longitudinal edges on the measuring tape 16. The other longitudinal edge is oriented as a plate edge 2 to the predetermined line 5 and the support surface 4 out. In Fig. 3, the glass plate 1 through the two

Holding devices 6 and 8 already linear close to

predetermined line 5 has been transported.

Fig. 4 shows the situation of Fig. 3, wherein the second

Holding member 7 already - has been moved along the circular arc 20 to the left - without being in engagement with the glass plate 1, as preparation for rotation by 90 °, for example, a short edge of the glass plate 1 thereafter at the support surface 4 and der Linie 5 align. In this case, the sensors 9 are lowered to allow the rotation of the glass plate 1. In Fig. 5, the glass plate 1 was already 90 ° in

Turned clockwise, so that the glass plate 1 is now with their longitudinal edges normal to the predetermined line 5. The second holding element 7 has been moved by the rotation in the semicircle 20 to the right. The sensors 9 remain in the lowered state, because yes, the glass plate 1 is located above the two central sensors 9.

In FIG. 6, after the situation of FIG. 5, the glass plate 1 is again transported linearly back in the direction of the measuring tape 16, so that the stops 12 (see FIG. 13) of the two middle sensors 9 are now extended to the short edge of the

Align glass plate 1 on the predetermined line 5. The two outer sensors 9 can remain lowered because they are outside the region of the short edge of the glass plate and can not contribute to the alignment. Fig. 7 again starts from the situation in Fig. 2, now the long plate edge 2 of the glass plate 1 is to be aligned with the predetermined line 5. For this, the glass plate 1 is linear promoted to line 5. Already here it can be seen that the plate edge 2 is not exactly parallel to the line 5.

Fig. 8 shows the situation of Fig. 7, now the glass plate 1 is already closer to the predetermined line 5. The glass plate 1 is thereby linearly displaced at a transport speed.

From a predetermined normal distance of the plate edge 2 of the predetermined line 5, the stops 12 (see FIG. 13) of the sensors 9 are extended and is the

Transport speed to a search speed

reduced so that a defined contact between stop 12 and plate edge 2 can take place. As soon as the plate edge 2 reaches the predetermined line 5 at one point, contacts the first stop of a sensor 9 and begins to displace it, the search speed with which the

Glass plate is conveyed here from left to right, reduced to a measuring speed. In Fig. 9, this situation is shown, where the lowest in the plane of the sensor 9 due to the inclination of the glass plate 1 is contacted first. By contrast, in the case of the uppermost sensor 9, the plate edge 2 can still be several millimeters or even several centimeters, e.g. 49 mm, away from the sensor 9.

According to FIG. 10, starting from FIG. 9, the glass plate 1 continues to move linearly over the line 5 in its oblique orientation until the plate edge 2 has also reached the last sensor 9, which is the upper one here. Each sensor 9 determines the displacement of the stop 12 of the sensor since contact with the plate edge 12, thus after reaching the line 5. From this, the amount of correction for the orientation is calculated, which is shown here as a gray wedge.

In FIG. 11, starting from the situation in FIG. 10, first and second auxiliary elements 6, 7 then come into action and rotate the glass plate 1 based on the measured values of the sensors 9 an angle so that the plate edge 2 comes to lie parallel to the line 5, so all the sensors 9 the same distance on their measuring section 11 (see Fig. 13) have, ie by the stops 12 of the sensors have each covered the same path from a starting position ,

Subsequently, see Fig. 12, the stops 12 of

Sensors 9 lowered, the glass plate is now aligned, and can in this position for processing, such as

Color order to be further moved to the support surface 4, beyond the predetermined line 5 addition, by means of first and third auxiliary elements 6, 8th

Fig. 13 now shows a side view of a sensor 9, as used in Figs. 1-12. The sensor 9 is designed as a mechanical position sensor, with a linear, namely parallel to the support surface 4 or plane of the

Zustelltisches 3 and normal to the given line 5,

displaceable measuring part 10. This is moved after contact with a plate edge 2 of the plate-shaped object 1 along a measuring section 11.

The measuring part 10 has a stop 12, which can be moved normally to the level of the infeed table 3 or to the support surface 4 and which can be lowered below the level of the infeed table 3 as an extension of a piston rod of a cylinder piston 13. Here is the

lowered position of the stop 12 shown. The

Glass plate 1 could now be pushed further to the right or rotated without being hindered by the sensor 9. The cylinder of the cylinder piston 13 is on the measuring part 10th

attached, which includes a further cylinder piston 14.

This is displaceable in a fixed cylinder, namely parallel to the plane of the Zustelltischs 3 or to the support surface 4 and normal to the predetermined line 5. The movement of

Cylinder piston 14 relative to the cylinder is over a Measuring section 11 recorded. Thus, the distance between the plate edge 2 and predetermined line 5 is specified.

FIG. 14 shows a plan view of the sensor from FIG. 13, with a glass plate 1 which moves linearly, ie from left to right, with its plate edge 2 towards the stop 12, which is here in the extended state. that of the highest possible position of the

Cylinder piston 13 in Fig. 13 corresponds.

In Fig. 15, where again a plan view of the sensor 9 and the support surface 4 of FIG. 13 is shown, the regions of different speed of the glass plate 1 are shown schematically. The glass plate 1 moves up to a predetermined distance from the sensors 9, or the not shown here predetermined line 5, with the relatively large transport speed vt. From then on, the glass plate 1 is moved more slowly, namely at the search speed vs, in order to produce the first contact with one or, ideally, simultaneously with all the sensors 9. As soon as one of the sensors 9 has found contact with the glass plate 1 through its stop 12, the speed is reduced to a measuring speed vm in order to obtain an accurate measurement, this measuring speed being dependent on the properties of the sensor 9.

Accordingly, in Fig. 15, a zone 17 of

Transport speed, a zone 18 of the search speed and a zone 19 of the measuring speed drawn. LIST OF REFERENCE NUMBERS

1 glass plate (plate-shaped object)

2 plate edge

3 Zustelltisch

4 contact surface (level of the Zustelltischs)

5 predetermined line

6 first holding element

7 second holding element

8 third holding element

9 sensor

10 measuring part

11 measuring section

12 stop

13 cylinder pistons of the stop

14 cylinder pistons of the measuring part

15 suction element

16 tape measure

17 zone of transport speed

18 zone of search speed

19 zone of measuring speed

20 circular arc

21 Outbreak for inspection of support surface and sensors vm measuring speed

s search speed

t transport speed

Claims

EXPECTATIONS

Device for aligning a plate-shaped

Object (1), with at least one straight plate edge

(2), on a predetermined line (5), comprising at least one delivery table (3) for the object, devices for linear movement and rotation of the object (1) relative to the delivery table (3) and sensors (9).

Determination of the relative position of a straight plate edge

(2) to a given line (5), thereby

marked,

- that at least a first holding element (6) is provided for a plate-shaped object (1), which can be moved normal to the predetermined line (5) and parallel to the plane of the feed table (3) and about an axis normal to the plane of the feed table ( 3) is rotatable,

- that at least a second holding element (7) is provided for a plate-shaped object (1), which runs along an arc (20) parallel to the plane of the

Delivered ischs (3) is movable, and

- that at least one sensor (9) on the delivery table (3)

is intended to ensure an alignment of a straight line

Measure the plate edge (2) of a plate-shaped object (1) to the specified line (5).

Device according to claim 1, characterized in that the second holding element (7) is normal to the plane of the

Delivery table (3) is designed to be movable.

Device according to claim 1 or 2, characterized in that a third holding element (8) is additionally provided for a plate-shaped object (1), which, like the first holding element (6), is normal to the predetermined line (5) and parallel to the plane of the delivery table

(3) is movable.

4. Device according to claim 3, characterized in that the third holding element (8) is normal to the plane of the

Delivery table (3) is designed to be movable.

5. Device according to one of claims 1 to 4, characterized

characterized in that there are at least two on the delivery table (3).

Sensors (9) are provided.

6. Device according to claim 5, characterized in that the at least two sensors (9) are arranged on the delivery table (3) along the predetermined line (5).

7. Device according to one of claims 1 to 6, characterized

characterized in that at least one sensor (9) as

mechanical position transmitter is designed, with a linearly displaceable measuring part (10), which can be displaced along a measuring section (11) after contact with a plate edge (2) through the plate-shaped object (1).

8. Device according to claim 7, characterized in that the measuring part (10) has a stop (12) for a plate-shaped object (1) which can be moved normal to the plane of the delivery table (3), so that the stop (12) is below the level of the delivery table (3) can be lowered and a

Plate-shaped object (1) can be pushed over the sensors (9) if the distance is not measured

Plate edge (2) from the specified line (5).

9. Device according to claim 8, characterized in that the stop (12) with a normal to the plane of the

feed table (3) movable cylinder piston (13)

connected is.

10. Device according to one of claims 7 to 9, characterized

characterized in that the measuring part (10) comprises a cylinder piston (14) which is parallel to the plane of the feed table (3) and normal to the given line (5) along one

Measuring section (11) can be moved.

11. Device according to one of the preceding claims, characterized in that the first (6), second (7) and / or optionally third holding element (8) has at least one

Have suction element (15) to fix the object (1).

12. Method for aligning a plate-shaped object

(1) with at least one straight plate edge (2) on a predetermined line (5), using a device according to one of claims 1 to 11, comprising the steps

- Placing a plate-shaped object (1) on the first holding element (6) and linearly moving the object (1) aligned parallel to the plane of the feed table (3) towards the predetermined line (5), with a

transport speed (vt),

- Reducing the transport speed (vt) of the first holding element (6) to a search speed (vs) from a predetermined normal distance of the straight plate edge (2) from the predetermined line (5) and continuing the

Move the object (1) until the straight edge of the plate

(2) according to the measurement of a sensor (9), the specified line (5) is reached at one point, in particular one of the

Sensors (9) contacted,

- Decrease search speed (vs) to one

Measuring speed (vm), continuing the movement of the object (1) and measuring the distance covered by the plate edge (2) until the straight plate edge has reached the specified line (5) according to the measurement of all sensors (9),

- Rotating the object (1) with the first and/or second holding element (6,7), if the measured

Distances of the sensors (9) are of different sizes until the sensors (9) are at the same distance, in particular no distance between the plate edge (2) and the specified line (5) can be detected.