JP2001088954A - Automatic stacked paper replacing device installed on paper sheet feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly collect residual stacked papers and new paper sheet stacked papers in the replacement of stacked papers in a paper sheet feeding device provided on a paper sheet processing machine. SOLUTION: This paper sheet feeding device comprises a nonstop device 3, and a support rod 1 driven by a motor is used in order to temporarily receive residual stacked papers R in the mounting of new paper sheet stacked papers S. In the integration of the residual stacked papers R with the paper sheet stacked papers S, a detecting device 11 monitors the vertical movement of the support rod 7 provided on the nonstop device 3 to prevent the support rod 7 from being held up. In the whole process of stacked paper replacement, a circuit device monitors the movement of the support rod 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic pile changing device described in the first aspect of the present invention.

[0002]

2. Description of the Related Art In a sheet processing apparatus, a so-called non-stop apparatus is used to replace a stack. For this purpose, the sheet stack is loaded on a pallet of a sheet feeder of a sheet-fed rotary printing press, for example, and continuously raised, and the sheet is unwound from above the sheet stack. Is transported to a sheet processing device. In addition, when the transport of the sheet pile has been completed, prepare the new sheet pile as soon as possible in the sheet feeder and process it so that the production is not interrupted too long and continue. Preparations must be made for handling paper. For that purpose, a non-stop device is used. In this case, the residual pile loaded on the pallet of the sheet pile in the sheet supply device is received from the pallet by the above-mentioned non-stop device, and is then separated in a cycle adapted to the processing rhythm. Be raised to do. At the same time, the empty pallet is removed from the sheet supply and a new sheet pile loaded on a new pallet is mounted on the sheet supply. This new sheet pile is lifted for processing and combined with the remaining pile by a non-stop device. The sheets are then slewed from the top of the sheet stack as usual and fed to a sheet processing device, without having to interrupt the normal production process while changing the stack.

[0003]

It is well known that when feeding sheets, the upper side of the sheet pile is not always located exactly in a horizontal or flat position. In the past, in order to prevent failures resulting from such defective positioning, the operator of the sheet feeder had to meticulously place new sheet piles on the residual pile stacked on the non-stop device. Special care had to be taken when packing the sheets, such as approaching and carefully removing the support rods of the nonstop device by hand. In some cases it may be necessary to adjust the position of a new sheet pile by inserting a wedge.

In an automatic system, a support rod is
The drive removes the area between the remaining stack and the new sheet stack. While the new sheet pile is transported from below with the pallet towards the support rods,
The remaining pile is piled on the support rod. If the upper side of the sheet pile is not horizontal and is slightly inclined, for example if one edge of the sheet pile is inclined relative to the horizontal position of the support rod, a new sheet The stack is first abutted on only one edge under the support rod. In the disadvantageous case, the support rod may even bend because only one side of the support rod is loaded. In this way, the support rod is strongly pressed or one side is pressed. A great deal of force must then be expended in removing the support rod from the sheet pile area. In addition to the high friction, there is a risk of damaging the sheet. A reliable means is a sheet-holding device, which is used to prevent slippage of the sheets in the integrated area of the sheet stack and the remaining stack, and to ensure that the sheets are not misaligned. A large force must be applied to the paper to press it. Such a sheet holding device can damage the edges of the sheets.

[0005] It is therefore an object of the present invention to smoothly combine a residual stack and a new sheet stack when the stack is automatically changed in the sheet feeder.

An object of the present invention is to provide an apparatus according to claim 1 in which the apparatus according to the present invention is provided with a device for storing residual paper and a new sheet, irrespective of the surface shape of the newly supplied sheet. The purpose is to form the stack so that the stack can be gathered smoothly.

[0007]

The above object is achieved by the features of the present invention. In a preferred embodiment, means for monitoring the load on the support rod of the non-stop device is used. Such a means can be particularly advantageously mounted on the guide side of the support rod. The function of such a means is in particular that the support rod guided by the non-stop device for the temporary placement of the residual stack keeps a light movement in any case where the alignment of the stack is unbalanced. is there. The stack is therefore smoothly packed and the support rod to be withdrawn and the device for pulling the support rod are not overloaded. In addition, the surface of the new sheet pile does not suffer too much load.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a side view of a sheet processing apparatus 1, in particular, a sheet supply device 2 provided in a sheet-fed rotary printing press. The sheet supply device 2 is provided with a non-stop device 3. The sheet supply device 2 is further provided with a paper handling device 4. The sheet handling device 4 is provided above the sheet stack S provided in the sheet feeding device 2 and corresponding to the surface of the sheet stack, and is separated by a main lift device not shown in detail in the drawing. Of the sheet stacks S which have been raised in the sheet supply device 2, the uppermost sheet at each time is separated from the sheet stack and then transported towards the sheet processing machine 1. Used to In this case, the sheets are conveyed to the sheet processing machine 1 via a so-called conveyor table 20 in a scale-like manner (in a displaced and overlapping state).

The non-stop device 3 includes a sheet feeding device 2
Is lifted and lowered in contact with the sheet feeding device 2 by a residual pile lifting device 5 provided on a guide rail 8 provided on the end surface side of the sheet feeding device. The non-stop device 3 is therefore integrated in the sheet supply 2. The non-stop device 3 is further provided with a rod support 6, in which a support rod 7 is moved in the longitudinal direction. Since the support rod 7 is movable over the entire length of the rod support 6, it can enter or be pulled out of the area of the sheet stack S provided in the sheet supply device 2.

FIG. 2 shows the support rod 7 in the area of the sheet pile S. The original sheet pile S is placed on a pallet P. The sheet pile S is raised together with the pallet P from below toward the support rod 7. At the same time, the support rod 7 bears the residual pile R remaining after the processing of the previously mounted sheet pile S. The residual pile R is further separated by the non-stop device 3 and the residual pile lift 5 into a paper handling device 4.
Continue to rise towards. On the other hand, the support rod 7 has an end that is open in the running direction of the sheet, and the end is provided on the lift rail 9. The lift rail 9 is provided with a switching plate or similar switching device that responds to the load and detects the load on the support rod 7. With such a function, when replacing the stack, the remaining stack R
The lifting device 5 is synchronized with the main lifting device for the sheet stack S provided in the sheet supply 2. When further reaching the position where the sheet stack S and the residual stack R are integrated, the removal of the support rod 7 is usually
The sheet stack S is started by lightly lifting the support rod 7 from the lift rail 9 by the upward movement in the main lift device. The start of removal of the support rod is sensed by a switching device provided on the lift rail. In this way, the support rod 7 is released on the lift rail and is pulled out from between the sheet pile S and the residual pile R.

Therefore, the uppermost sheet of the residual pile R is sent to the paper handling apparatus 4 from the rising movement of the residual pile lift device 5 before the pile exchange, and is separated from the residual pile R. It is extruded onto the conveyor table 20.

Further, it can be seen from this figure that the upper side of the sheet pile S is not horizontal but slightly inclined to one side. In this case, the left edge of the sheet pile S is inclined with respect to the horizontal position of the support rod 7. However, the support rod 7 is clearly located on the residual stack lift device 5.
Since it is provided on the lift rail 9, it is horizontal. When the right edge of the sheet pile S first comes into contact with the lower side of the support rod 7, the support rod 7 may not move due to the load of the residual pile R. This is because one side of the support rod is lifted because the upper side of the stack is inclined. Therefore, the support rod 7 is inevitably unable to move until the left side of the sheet pile comes into contact with the lower side of the support rod 7, and may even be partially curved. A detector 11 is provided in the non-stop device 3 above the support rod 7 in order to prevent such a motionless state or bending.

FIG. 3 shows the details of FIG. 2 in more detail. Also in this figure, the support rod 7 is provided horizontally, and the residual pile R is stacked on the support rod 7. The support rod 7 is provided on a rod guide 10. Rod guide 10
Is a part of the non-stop device 3. Rod guide 10
Are provided with drive motors 12, which are connected to the support rod 7 via a gear coupling 13. Accordingly, each support rod 7 is moved in the longitudinal direction by the drive motor 12. In the position shown, the support rod is being withdrawn from the stack area. On the lower left side of the support rod 7, the upper side of the sheet pile S approaches the lower edge of the support rod 7. In this figure, the inclined upper side of the sheet pile S is exaggerated. Also in this case, it is clear that the right edge of the sheet stack S first comes into contact with the support rod 7. Due to the abutment of one side, the switching action that the lift rail 9 provided on the left side of the sheet stack S should perform on the remaining stack lift device 5 firstly depends on the stack of the sheet stack S. Does not work in time when the side starts up. Accordingly, the lifting movement of the sheet pile S by the main lift device of the sheet feeding device 2 causes the support rod 7 to continue to rise, thereby causing the support rod 7 to become unable to move or bend. Even it can happen. In order to avoid such a situation, a detector 11 is provided above the support rod 7. The detector 11 is a rod guide 1 of the support rod 7.
0 or connected to the non-stop device 3. The detector 11 acts on the upper side of the support rod 7 and senses a vertical deviation of the support rod from a horizontal position or a normal horizontal position. Accordingly, the sheet stack S is moved downward from the support rod 7.
When the support rod is moved upward, the detector 11 senses this. At the same time, it is also detected via the circuit whether the movement by the lift rail 9 is sensed on the opposite side of the sheet pile S, ie whether the sheet pile S has lifted the support rods over the entire length. . If the sheet pile has not lifted the support rods over their entire length, the main lifting device is stopped. In this way, the residual pile lifting device 5 can lift the residual pile R slightly again from the sheet pile S. This reduces the load on one side of the support rod and avoids bending of the support rod. If one side is no longer pressed in this way, the support rod 7 can be pulled out of the stacking area without any problems. In this way, all the support rods 7 can be reliably pulled out from the area between the residual pile R and the sheet pile S with a uniform force over the entire width.

By means of a corresponding switching device, for example, the withdrawal of the support rod 7 can take place at an intermediate value at which the sheet stack S abuts against the underside of the support rod 7. In this case, the upper inclined position of the sheet pile S may be oriented in any direction, but only when the inclined position is inclined in the direction of the lift rail 9, the non-stop device 3 as a support for the support rod 7 is provided. The notification by the detected detector 11 is not performed. In this case, the driving side of the support rod 7 in the area of the rod guide 10 is not subjected to a very strong load, so that the load state for pulling out the support rod 7 is relatively dangerous. In this way, in any case, the present apparatus uniformly releases the load on the support rod 7 when the sheet is pulled out of the stacking area or in the entire process of combining the remaining stacking sheet R and the sheet stacking sheet S. It is considered to be.

In the preferred embodiment, circuitry is provided so that the function of the detector 11 is fully utilized in the entire stack change process. In this case, the load is continuously sensed for all the support rods 7 and the control of the residual stack lift device 5 and the main lift device is controlled in a known manner until all the support rods 7 are completely removed from the stack area. Adjusted to each other.

In the non-stop device 3, for example,
An apparatus in which support rods 7 having different thicknesses, such as stepped thicknesses, are provided alternately can be suitably used. In this case, in a special configuration, only the thick support rod 7 is provided on the lift rail 9 in a pressed state, and the thin support rod 7 is attached to the sheet stack S
Only covers. In this case, each drive motor 1
By means of 2, the thicker support rod 7 is first withdrawn from the sheet region and then the thinner support rod 7 withdrawn. In such a case, the detector 11 may be provided only on the support rod 7 having a larger thickness, and the pull-out movement may be monitored.

The detector 11 can be formed as a general detection rail which scans all the support rods 7.
Such a device senses the vertical upward movement of the support rod 7 relative to the non-stop device 3 or the rod guide 10. Non-contact detector 1
In this case, it is conceivable to provide a device in the form of a photoelectric barrier. Similarly, it is also possible to provide a unique detector 11 for every support rod 7. This method is also suitably applicable to a detection device that operates in a non-contact manner.

The method of replacing piles using the above-described apparatus is as follows.
As mentioned above, the handling of the sheets is particularly important in the integrated area of the sheet stack S and the residual stack R.
The monitoring process is started when the sheet pile S approaches.
When the upper side of the sheet stack S contacts the lower side of the support rod 7 supporting the remaining stack R, the circuit senses the circuit signal produced by the lift rail 9 and the detector 11. At this time, depending on the relative position of the upper pile edge of the sheet pile S, the lift rail 9 and the detector 1 relating to the upward movement of the residual pile lift device 5 and the main lift device.
Only a certain maximum tolerance is allowed for one circuit signal. Ideally, if the stacking surface of the sheet stack S is flat, the height difference will be almost zero. This height comparison is made throughout the entire stack change process. The lifting device 5 and the main lifting device of the sheet supply device 2 are always adjusted to each other during the upward movement by means of a signal comparison.

The allowable range can be adjusted to be larger or smaller depending on the weight of the residual pile R. If the residual pile is relatively light, for example a relatively light material to be printed, the lamination change process is easy and quick because of the relatively large tolerance. In this case, the danger that the support rod 7 becomes stuck and does not move is reduced. Also, the risk of damaging the sheets in the integrated area is not so great.

In the present invention, the detector 11 can be formed as a sensor for detecting a load. In that case, the detector must of course always be in contact with the support rod 7. Load is evaluated in the same way as vertical movement.

[Brief description of the drawings]

FIG. 1 is a side view of a sheet feeding apparatus according to the present invention.

FIG. 2 is a side view showing an integration step.

FIG. 3 is a side view showing details of the non-stop device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet processing machine 2 sheet feeding device 3 non-stop device 4 paper handling device 5 residual pile lift device 6 rod support 7 support rod 8 guide rail 9 lift rail 10 rod guide 11 detector 12 drive motor 13 Gear coupling device 20 Conveyor table P Pallet R Residual stack S Sheet stack

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Uwe Beel, Germany 63069 Offenbach Marienstraße 50 (72) Inventor Jens Göbel, Germany・ 1 (72) Inventor Robert Ortner, Germany 63755 ・ Alzenau Siedolnk am Stein ・ 26

Claims (13)

[Claims] 1. A sheet stack changing device provided in a sheet feeding device provided for a sheet processing machine, wherein a new sheet stack is supplied to the sheet feeding device. A non-stop device for temporarily receiving the remaining stack during mounting, the non-stop device being formed as a support rod that can be pushed into and out of the stack area by a motor-driven device; A lift device assigned to the sheet pile and to the residual pile or the non-stop device, respectively, and the supporting rod is provided for the residual pile. And a detecting device for sensing contact with at least a part of a lifting device for the stacking device. Sheet pile (S)
Device for sensing the vertical movement of said support rod (7) in the area of the drive by means of a motor when integrating with the residual pile (R). 2. A detector (11) is attached to the support rod (7) so that the vertical position of the support rod (7) with respect to a motor-driven device is sensed. The device according to claim 1, characterized in that: 3. The support rod (7) such that vertical movement of the support rod (7) with respect to the non-stop device (3) is sensed irrespective of movement of the open end of the support rod (7). Device according to claim 1, characterized in that a detector (11) is provided in association with (7). 4. A detection rail fixed to the non-stop device (3) and capable of abutting on the support rod (7) or a detection rail provided on the support rod (7). 4. The device according to claim 1, wherein the device is formed as: 5. The detector (11) is fixed to the non-stop device (3) and is formed as a non-contact detector for sensing the entire vertical position of the support rod (7). An apparatus according to any of claims 1 to 3, wherein 6. The device according to claim 4, wherein the detector (11) is provided on the support rod (7) from below. 7. A detector (1) is provided on each support rod (7).
7. The device according to claim 4, wherein 1) is provided. 8. The non-stop device (3) is provided with support rods (7) of different heights, and the detector (11)
5. The device according to claim 4, wherein the support rod (7) has a maximum height. 9. The device according to claim 1, wherein the detector is formed as a load-sensing sensor and is in contact with the support rod. The described device. 10. A movement signal for a vertical movement of said support rod (7) with respect to said non-stop device (3) produced by said detector (11) during a stack change process, further comprising a control device. And a movement signal of a further detection device for sensing the open end of the support rod (7) is sensed by the control device for the sheet stack (S) and the residual stack (R). 10. Apparatus according to any of the preceding claims, characterized in that it is compared with each other for the upward movement of the lifting device. 11. A method for exchanging a stack in a sheet stack changing device provided in a sheet feeding device provided for a sheet processing machine, wherein the stack changing device includes a sheet changing device. It has a non-stop device for temporarily receiving the remaining stack while the new sheet stack is installed in the feeder, which can be pushed into the stack area by a motor driven device And having an auxiliary stacking rod that can be withdrawn from the stacking area and formed as a support rod, further pushing the support rod below the remaining stack in the stacking area for stacking change.
Removing the existing pallet, attaching a new sheet pile provided on the new pallet to the sheet feeding device, raising the new sheet pile to the support rod, and then supporting the sheet A method of integrating the new sheet pile into the residual pile by removing a rod from the pile area, comprising: (7) and lift the new sheet pile (S) from below into the support rod (7).
When the support rod (7) is brought into contact with the lift device, the position of the support rod (7) with respect to the lift device is sensed, and one or all of the support rods (7) face each other in the area of the non-stop device (3). Main lift device for transporting the sheet stack (S) when a difference in the position of the support rod (7) with respect to the lift device is confirmed as being further raised than a typical open end. On the other hand, while the non-stop device (3) and the residual pile lifting device (5) for transporting the residual pile (R) until the maximum allowable position difference or signal difference is exceeded. ), And the withdrawal movement of said support rod (7) is only started afterwards. 12. The method according to claim 1, further comprising the step of comparing the difference in position or the difference in signal until all support rods are removed from the stacking area during the entire stack changing process. Item 12. The method according to Item 11. 13. The method according to claim 11, wherein the maximum permissible position difference or signal difference is adjustable.
Or the method of 12.