JP3120066B2 - Method and apparatus for adjusting the position of an automatic pile changer - Google Patents

Abstract

The method for aligning an automatic stack changer with a non-stop feeder involves preparing sheets to be printed as a stack (S) on the top side of a pallet (P) having multiple of slots (N). The carrying bars (7) of an auxiliary carrier (3) are moved in the pallet slots, for the receiving of the stack (S) or the residual stack (R). Following the placing of the pallet on the stack carrying plate, the position of at least one slot on the top side of the pallet in the direction of the A or B sides is detected and before the travelling in of the carrier bars in the slots of the pallet, the carrier bars are aligned corresp. to the established position in the direction of the A or B sides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sheet processing machine,
In particular, a method for adjusting the position of an automatic pile changer of an offset sheet-fed printing press having a non-stop sheet feeding device, wherein a sheet to be printed is prepared as a pile on a pallet having a plurality of grooves, and an auxiliary pile support is provided. The support rods of this type are driven into grooves in a pallet to receive piles or remaining piles. Also, the present invention
Apparatus for adjusting the position of an automatic pile changer for a sheet processing machine, in particular for an offset sheet-fed printing press having a non-stop sheet feeder, comprising a vertically movable auxiliary pile support for receiving the remaining pile. The auxiliary pile support having a plurality of horizontally movable support rods which can enter and exit between the pile and the grooved pallet in the sheet transport direction. A drive device having a vertically movable pile support plate for receiving the sheet and further operatively connected to a control device for adjusting the position of the pile support plate in the transverse direction with respect to the sheet transport direction Having the form.

[0002]

2. Description of the Related Art In an offset sheet-fed printing press, a sheet to be printed is taken out from the upper side of a sheet feeding pile and is conveyed to a pad via a conveying table. Offset sheet-fed printing presses process sheet thicknesses on the order of 1 mm or more, and have high speeds (10,000-15,000 sheets / hour).
The pile is used quite quickly in the machine's feeder, since it is conveyed through the machine. Preparing a new pile on the pile support plate so that the production run can be continued without interruption, ie positioning this new pile in exactly the same position below the remaining pile (remaining pile of already used pile) And then replace the remaining pile with the new primary pile.
It is necessary to make one. For this purpose, the slightly used pile (remaining pile) is removed from the pallet on the pile support plate, and after the pile support plate has been lowered to load the new main pile, the new main pile is again loaded. Automatic pile changers have been developed that can be placed in a precise position above the pile. These known pile changing devices work in particular with rake-like rods which move horizontally. In this case, these rods for receiving the remaining pile are provided on a vertically movable auxiliary pile support device.

DE-A-197 04 285, which has not yet been published, discloses such a pile changing device for an automatic sheet feeder of an offset sheet-fed printing press. In this pile changing device, the rods of the auxiliary pile support device are formed individually and / or in groups so that they can be moved in to lift the remaining pile. The pallets for receiving the piles have groove-shaped cross sections on their upper side, these grooves extending in the direction of the rods which are runnable and runnable. The auxiliary pile support device is positioned at a height level such that the rod can enter between the webs supporting the pile at exactly the height of the groove. For this purpose, after the pile support plate has been lowered and a new pallet has been placed, it is necessary to precisely position the pallet with the new pile with respect to the rod of the auxiliary pile support device. If this is not done, collisions between the rod and the web of the pallet (grooved section) can occur, which can lead to severe damage.

[0004] The possibility of simple position adjustment arises from the fact that a new pile-loaded pallet, which is placed on a lowered pile support plate, is brought into position exactly, in which case a forklift is used by the operator. Must be placed in place using This makes the handling relatively slow and cumbersome. In addition, this increases the time for the entire pile changing process, resulting in a relatively large remaining pile being retained by the auxiliary pile support, increasing the frequency of automatic pile changing.

From US Pat. No. 5,011,126,
The newly placed on the main pile below the auxiliary pile, sheet-fed
It is known to use a pile support plate capable of reciprocating in the transverse direction with respect to the paper transport direction, and to position the remaining pile so as to accurately overlap the new main pile. For this purpose, a detector is provided which can scan the position of the remaining pile (the side of the remaining pile) and the position of the main pile below it. However, this known device,
It does not have a support rod of an auxiliary pile support device which cooperates with a channel forming section arranged on the upper side of the pallet.

[0006] From DE 41 29 702 A1 a distance measuring system is known which is used for special applications of pile position adjustment in automatic pile changing machines. The system consists of two measuring channels operating according to the principle of triangulation, with which the distance to the side of the remaining pile or the side of the main pile can be determined, respectively, and these piles are then positioned relative to each other by a corresponding positioning device. Position adjustment. However, this particular measurement system does not successfully align an auxiliary pile support with a horizontally movable rod with respect to a pallet with a grooved cross section on top.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to expand the method and the device for adjusting the position of an automatic pile changer as described in the dependent claims.
An object of the present invention is to avoid the drawbacks mentioned above and to ensure a simple and reliable positioning of the rod of the auxiliary pile support device with respect to the surface of the pallet receiving the main pile having a corresponding cross-section.

[0008]

In order to solve the above-mentioned problems, according to the method of the present invention, after the pallet is placed on the pile support plate, the position of at least one groove on the upper side of the pallet is set in the sheet transport direction. Before the support rod moves into the groove of the pallet, the support rod is adjusted in the transverse direction with respect to the sheet transport direction according to the confirmed position, in which case The pile support plate is moved laterally with respect to the sheet transport direction, during which a signal is detected by at least one distance measuring system (sensor) in the range of the groove or web height, and this signal is detected. There was so that examined to define the position of at least one groove in the upper pallet in the control signal in combination with, transversely to the sheet transport direction of the respective drive unit.

Furthermore, in order to solve the above-mentioned problems, in the apparatus according to the present invention, the control device and the position of at least one groove of the pallet above the pile supporting plate are arranged in a direction transverse to the sheet conveying direction. At least one sensor for detecting the position of the auxiliary pile support device is connected to the control rod of the auxiliary pile support device, and the support rod is moved in a direction transverse to the sheet transport direction in response to a signal from the sensor. in it comes with driving device for positioning at least 1 to 4096.
Sensor is installed at a predetermined height in the paper feeder,
Is attached to the side of the
Device that can be generated via the drive
During the movement of the il support plate in the direction transverse to the sheet transport direction
In addition, the molding cross section of the pallet groove on the pile support plate
Scanable and controllable by at least one sensor
Driven from the signal of at least one sensor by the device
In combination with the control signals of the device,
The position of at least one groove of a pallet can be determined . Advantageous embodiments of the invention, according to claim 2-6
And 8 to 12 .

According to the present invention, after a new pallet is placed on a pile support plate for a main pile that has been completely or almost completely lowered, the position of the new pallet is detected by a sensor, and the auxiliary pile support device is detected. In order for the rods of the pallet to accurately enter the grooves between the upper webs of the pallet,
Check how much displacement must be moved in the transverse direction to the sheet transport direction .

This means that, in accordance with the invention, in a first preferred embodiment, a sensor formed as a reflected light scanner is arranged in the lower area of the sheet feeder, by means of which the main pile is mounted on a pile support pallet. Can be confirmed by confirming the position of the pallet or the groove-shaped cross section on which the sheet is placed in the transverse direction with respect to the sheet conveying direction . in this case,
This reflected light scanner lifts the pile support plate on which a new pallet with pile on it is placed at the height of the lower area of the paper feeding device, preferably at the center thereof, by a predetermined displacement amount, and then performs effective scanning. The area is arranged so as to be located exactly at the height of the groove forming section of the pallet. The pile support plate is then moved by a predetermined amount in the transverse direction with respect to the sheet transport direction, and as a result, based on the scanning signal of the sensor, the position of the groove or the web located therebetween is determined. It can be confirmed. To confirm the position of the groove, a pile supporting plate simply is moved to one direction, it may only be sufficient for defining the switching position of the groove from the sensor signal. However, when the pile support plate is moved in both directions by a predetermined amount of displacement, and thus the signal course of the sensor, combined with a control signal for the positioning drive of the pile support plate, the center of the groove is determined with higher precision.

After defining the position of the groove, the pile support plate can be moved back to the basic position (center of the sheet feeder). next,
From the position of at least one groove or web, the entire rod or auxiliary pile support device (starting from the zero position) transports the sheet so that the rod can accurately enter the groove of the pallet to receive the remaining pile. To the direction
It is possible to determine how much lateral movement must be made. The support rod stays in place until a new entry, that is, until a new pallet with a new pile
It remains in this position depending on the position of the pallet on the pile support plate. After lifting the remaining pile from the pallet, the new main pile is brought into a position completely overlapping the remaining pile by a positioning movement transverse to the sheet transport direction . For this purpose, detectors are provided which scan the sides of the remaining pile and the main pile.

In the first preferred embodiment of the present invention described above, the pallet measurement is performed by a sensor (reflection light scanner) arranged in the lower area of the sheet feeding device. With this sensor, which cooperates with the upper side of the pallet in the area of the groove section,
Due to the periodicity of the groove forming cross-section, it is possible to define a minimum displacement of the support rods of the auxiliary pallet support device, so that the support rods can enter into the upper groove of the pallet between the support webs without collision. is there. Furthermore, with this one sensor, the pallet is placed in the correct position with respect to the pile support plate, that is, in particular, the edge of the pallet is parallel or well parallel to the corresponding alignment edge of the pile support plate. You can see if it is extended. Finally, this one sensor also makes it possible to determine whether a pallet of approximately the appropriate type is being used, i.e., a pallet above which the grooved section to be measured is to be used. That is, if a pallet without any grooved cross section is used on the upper side, the switching of the scanning signal as the pallet moves during the measurement according to the invention will not be ascertainable.

In another embodiment of the invention, the positioning of the pallets mounted on the pile support plate can be performed by two sensors spaced from each other. In this case too, rods or auxiliary piles equipped with these rods are combined with the signals of the sensors from the corresponding movement signals of the driving of the positioning device in the transverse direction to the sheet transport direction of the pile support plate. The entire support device is in the sheet transport direction
The displacement amount to be moved in the lateral direction with respect to is defined.

Method for transporting a pile support plate according to the invention to a sheet
After measurement of the position of the pallet on a pile supporting plate while moving in the lateral direction is completed with respect to direction, in an advantageous embodiment of the present invention, the pile supporting plate of the main pile can be returned to the zero position again The sheet transport is then performed so that the sides of the main pile are aligned with (align with) the sides of the remaining pile held by the support rods of the auxiliary pile support device.
The position is adjusted laterally to the direction. Thereafter, the remaining pile and the new main pile are brought together by pulling out the rod of the auxiliary pile support device.

After the support rod has been inserted between the pallet and the new main pile, the pile support plate and the auxiliary pile support move synchronously until the remaining pile reaches a predetermined minimum height. That is, the corresponding drive is moved synchronously by the scanning of the upper surface of the pile by the sensor. Thereafter, the pile support plate is lowered and moved to the base position at the bottom for loading a new pallet carrying the main pile. After placing the new pile with the pallet, the position of the pallet is measured again so that the support rods can enter the upper groove of the pallet without collision.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The offset sheet-fed printing press 1 includes a paper feeding device 2.
The sheets are supplied from a transport table between them. For this purpose, the paper separating device 4
The sheet is taken from above the pile S (FIG. 1). The main pile S in the paper feeding device 2 is formed by a pallet P.
It is mounted on a pile support plate ST that can be raised and lowered by a lifting device (not shown). An elevating device 5 is provided in front of the paper feeding device 2.
The auxiliary pile support 3 which can be moved up and down via the guide rail 8 is provided. The auxiliary pile support 3 has a frame 6 in which a horizontally movable support rod 7 is mounted.
Is arranged. The support rod 7 is at a position where it has run inside the gantry 6 in the state of FIG.

The pallet P for receiving the main pile S on the pile support plate ST has a number of grooves N extending parallel to each other on the upper side thereof, and each of the grooves N remaining between these grooves N and below the main pile S. Web SG supporting the side (FIG. 5). The spacing and width of the grooves N and thus also the width of the web SG supporting the pile between these grooves N is matched to the spacing and width of the support rods 7 of the auxiliary pile support 3.

FIGS. 3 and 4 show the remaining pile R held by the support rod 7 of the auxiliary pile support 3 above the main pile S. First, a new pile was placed on the pallet P at the lowermost position of the pile support plate ST. After that, the pile supporting plate ST is moved to a predetermined height position above the basic position, and the forming section of the groove N and the web SG between them is arranged in the lower area of the sheet feeding device 2. , Facing the working range of the sensor 9 formed as an optical reflected light scanner (distance measuring system). Thereafter, the driving device 10 for adjusting the position of the pile support plate ST in the lateral direction with respect to the sheet transport direction is operated by the control device 11 for automatic pile exchange, and the pile support plate ST is moved to a predetermined position. The sheet is moved laterally by a displacement amount with respect to the sheet transport direction . At this time, how much movement of the driving device 10 formed as a positioning driving device causes the edge of the transition between the groove N of the pallet P and the web SG to appear by the sensor 9 formed as a reflected light scanner. That is, the sensor 9 precisely positioned at the center of the paper size of the paper feeding device 2
Can be confirmed how much the pallet P must be displaced on the pallet support plate ST so that the pallet P faces the groove N of the pallet P. The amount of displacement existing at the time of transition of the output signal of the sensor 9 is detected and stored in the control device 11. The pile support plate ST has a structure in which the pallet P and the pile S on the pallet P correspond to the pile support plate ST, and
Has additional devices and markings (not shown) that allow it to be placed at least approximately in the center of the device.

The control device 11 controls the pile support plate ST
After the amount of displacement required by the drive device 10 for position adjustment in the transverse direction with respect to the sheet transport direction is defined for the position detection of the at least one groove N by the sensor 9, another Sheet feeding method by the positioning drive 12
The support rods 7 of the auxiliary pile supports 3 movably mounted laterally with respect to the direction are adjusted accordingly, so that these support rods 7 are positioned below the pile S under the pile S. After being moved to the height level at which the rod enters, the rod can enter the groove N of the pallet P.

A pallet P and a pile support plate ST for defining the required orientation of the support rod 7 of the auxiliary pile support 3
The movement of the pile S in a direction transverse to the sheet transport direction is further illustrated in a plan view in FIG. Here, it should be pointed out again that the pile support plate ST is driven by the driving device 10.
Before the lateral movement with respect to the sheet transport direction is performed, the pile support plate ST is at the central basic position of the sheet feeding device 2 for detecting the position of at least one groove N. Pallet P
After measuring, the pile support plate can likewise be moved back to the basic position. The support rod 7 of the auxiliary pile support 3 is also
Basic position in front of the position adjustment <br/> integer Ji was respond to displacement required to be confirmed by the sensor 9 is in (zero position). For the first time the support rod 7 moves in, the support rod 7 or the auxiliary pile support 3 is adjusted in the transverse direction to the sheet transport direction . At this time, the remaining pile R is
, And is maintained until the support rod 7 is pulled out and combined with a new pile S. In doing so, the sheets that are removed from above the main pile S or the remaining pile R by the paper separating device 4 are always in the same orientation with respect to the lateral register.

Finally, it should be noted that the pile support plate ST
In addition to the above-described measurement of the position of the groove N of the pallet P or the position of the web SG according to the present invention, the driving device 10 for position adjustment in the transverse direction to the sheet transport direction of Before stacking in the sheet transport direction of the pile S
The horizontal position adjustment is also performed. Thereby, each of the piles S newly placed is individually adjusted with reference to the remaining pile R held by the support rod.

[Brief description of the drawings]

FIG. 1 is a side view of a sheet feeding device to which a pile changer is attached.

FIG. 2 is a plan view of a sheet feeding device having an auxiliary pile support base.

FIG. 3 is a view showing a pallet supporting the main pile and a remaining pile taken out of the main pile by a support rod.

FIG. 4 is a side view of the situation shown in FIG. 3;

FIG. 5 is a perspective view of a pallet provided with a sensor used in the present invention.

[Explanation of symbols]

Reference Signs List 1 printing machine, 2 paper feeder, 3 auxiliary pile support, 4 paper separating device, 5 elevating device (auxiliary pile support 3), 6 mount, 7 support rod, 8 guide rail, 9 sensor, 10 drive (pile) Adjustment of the support plate ST in the lateral direction with respect to the sheet transport direction ),
11 Control device (sensor 9, drive device 10, drive device 1)
2), 12 drive device (adjustment of the support rod 7 and the auxiliary pile support 3 in the lateral direction with respect to the sheet transport direction ), S
Pile (main pile), R remaining pile, P pallet, N groove (upper side of pallet P), SG web (upper side of pallet P), ST pile support plate

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Thomas Kleinschmidt Germany Otufenbatcha von Behring-Strasse 33 (72) Inventor Bernd Ulrich Germany Karl Main Friedenstrasse 11 (72) Inventor Robert Ortner Germany Republic of Alzenau G. Tolung am Stein 26 (56) References JP-A-4-354733 (JP, A) JP-A-3-288733 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) B65H 1/00-3/68

Claims (12)

(57) [Claims] 1. A method for adjusting the position of an automatic pile changer of a sheet-processing machine, in particular of an offset sheet-fed printing press having a non-stop sheet feeder, wherein the sheet to be printed is a pallet having a large number of grooves. Prepared as a pile on the upper side,
In a method in which the support rods of the auxiliary pile support are driven into the grooves of the pallet to receive the pile or remaining pile, at least one groove on the upper side of the pallet after placing the pallet on the pile support plate. Is detected transversely to the sheet transport direction, and before the support rod enters the groove of the pallet, the support rod is moved transversely to the sheet transport direction according to the confirmed position. At least one distance measuring system (sensor) in which the pile support plate is moved transversely with respect to the sheet transport direction and is in the range of the groove or web height during the movement. To detect the position of at least one groove on the upper side of the pallet in a direction transverse to the sheet transport direction in combination with the control signal of the respective drive. Wherein the examined et al is a method for positioning an automatic pile exchange. 2. A are moved laterally relative to the pile support plate sheet transport direction, the center position of the groove from the signal of at least one distance measuring system is defined, the method of claim 1. 3. The reciprocating movement of the pile support plate in a direction transverse to the sheet transport direction, while scanning the pallet groove or web forming section at a vertical position above the lowest position of the pile support plate. carried out, method according to claim 1 or 2. 4. The molding section of the groove or web of the pallet is scanned by a distance measuring system fixedly arranged at the center of the pile support plate and at a predetermined height level of the pile support plate on which the pallet is placed. A method according to any one of claims 1 to 3 . 5. A pallet groove or web of the forming section of is scanned by at least two distance measuring system which is arranged fixedly at a predetermined height level of the pile supporting plate carrying the pallet, from claim 1 any one method according to 3. To detect 6. groove or web of the forming section of the pallet, the pile supporting plate is moved by a predetermined amount of displacement transversely to the sheet transport direction of the machine, claims 1 to 5, The method according to any one of the preceding claims. 7. An apparatus for adjusting the position of an automatic pile changer for a sheet-processing machine, in particular for an offset sheet-fed printing press having a non-stop sheet feeding device, the machine being capable of moving up and down to receive the remaining pile. An auxiliary pile support having a plurality of horizontally movable support rods capable of entering and exiting between a pile and a pallet having a groove in a sheet conveying direction. And a vertically movable pile support plate for receiving the main pile, and further operatively connected to a control device for adjusting the position of the pile support plate in the transverse direction with respect to the sheet transport direction. A control device (11) and a position of at least one groove of a pallet (P) above a pile support plate (ST) in a sheet transport direction. Lateral to At least one sensor for detecting (9) is bonded acting, the support rods of the auxiliary pile support device (3) (7), said control device (11)
It comes with drive (12) for position adjustment in the horizontal direction connected have support rods (7) with respect to the sheet transport direction in accordance with the signal of the sensor (9) and at least one
Sensor (9) is provided at a predetermined height in the paper feeding device (2).
And is located in the sheet transport direction of the pile (S)
Attached to the side and driven by the control device (11)
Pile support plate that can be generated through (10)
In the case of movement in the transverse direction to the sheet transport direction of (ST)
The groove of the pallet (P) on the pile support plate (ST)
The molded cross section of (N) is applied to at least one sensor (9).
Therefore, it is possible to scan, and the control device (11)
From the signal of at least one sensor (9), the drive (1
Pile support plate (ST) in combination with control signal 0)
At least one groove of the pallet (P) on the upper side of the
Position of (N) is it characterized in that can be determined, a device for positioning an automatic pile exchange. 8. At least one sensor (9) is formed as a distance measuring system, according to claim 7 wherein. 9. At least one sensor (9) is formed as an optical measuring system, according to claim 7 or 8, wherein. 10. The device according to claim 9 , wherein the at least one sensor is formed as a reflected light scanner. 11. At least one sensor (9) is formed as a mechanical scanner, device of any one of claims 7 to 8. 12. A top pile supporting plate (ST), means capable of positioning the pallet (P) is within a predetermined range on the pile support plate (ST) is disposed, any of claims 7 to 11 The device according to claim 1.