DE2713242A1 - Paper stacking machine control system - has sensors to control tilt of feed conveyor section to match stack height in collector - Google Patents

Abstract

The control system is for a machine assembling layers of paper into a stack, having a paper collector with feed and discharge conveyors, the latter and the bottom of the collector all being at the same level. The feed conveyor has a section tilting out of this level to bring the discharge end to the height of the layers in the stack in the collector, which has a retainer on the discharge side. Signal emitters indicate the position of the tilting feed conveyor section and the presence of layers of paper in the collector and are connected to a drive causing the tilting movement.

Description

Deputy: paper layer stack-inclined plane-addition - A 32

Hamburg, March 15, 1977 Control arrangement for a device for laying paper layers on top of one another to form a stack The invention relates to a Control arrangement for a device for laying layers of paper on top of one another a stack, with a collecting device for the paper layers, a feed conveyor for feeding the paper layers to the collecting device as well as a discharge conveyor for Conveying the stack of paper layers away from the collecting device, with the feed conveyor, the bottom of the collecting device and the discharge conveyor are arranged in one plane, and the feed conveyor has a conveyor section which is parallel to one another the axis of rotation lying in relation to the conveying level can be pivoted out of the conveying level in this way is that its discharge end adjacent to the collecting device in each case the height of Occupies layers of paper located in the collecting device and a conveyor ramp forms for the subsequent paper layers, as well as the collecting device with one holding means and control means for the conveying section delimiting the outlet side and the holding means, according to patent ... Patent application P 26 48 032.0.

In the sense of the invention, a paper ply is a group or number of sheets of paper stacked one on top of the other. Under a stack of paper layers verden mei or more layers of paper or groups of layers stacked on top of each other Understood sheets of paper.

The invention on which the main application is based had the aim to form stacks from several paper layers and during the stack formation the paper layers to keep under control Set '.: Paper layer stack-inclined plane-addition - A 32 Hamburg, March 15, 1977 that a shifting and kinking of individual sheets of paper is prevented and thus precise alignment and gentle treatment of the Paper layers is guaranteed.

In practice it is customary to place paper layers on several parallel layers Conveying conveyor tracks, preferably on three conveyor tracks, to a collecting station, each of the conveyor tracks being assigned its own collecting device. It exists the requirement that the number of paper layers within a package forming stack always knew to be the same on each of the transport tracks. This requirement opposes the fact that the paper layers on the individual conveyor tracks at irregular intervals one after the other, or that on any of the transport tracks at times even one or more layers of paper are completely missing.

The invention is based on the object of each of the collecting devices to be provided with control means, which the completeness of each stack or. Package monitor and ensure.

This object is achieved according to the invention in that the star means signal transmitter responsive to the position of the pivotable conveyor section as well as responsive signal transmitters in the presence of paper layers in the collecting device auBveisen, which in such a way with a drive means for pivoting out the conveyor section are connected that with at least one paper layer in the collecting device of Drive of the conveyor section is activated until the height of each The paper layer or layers in the room is reached as often activated until a pre-pinned number of paper layers are in the accumulator is reached.

Deputy: paper layer stack-inclined plane-addition - A 32 Hamburg, the 15. March 1977 To monitor the pivoting position of the conveyor section According to an advantageous embodiment, the signal generator is a check for its presence associated with a paper layer passing through the conveying section, responsive signal transmitters.

This prevents the conveyor section from being driven over a sheet of paper inadvertently activates the pivoting mechanism of the conveyor section is set.

Buttocks. Another advantageous embodiment consists of the signal transmitter for registering a paper layer or a predetermined number of paper layers in the collecting device from a sensor means in the area of the collecting device respectively.

a counter means connected upstream of the signal generator. In this way can exactly the required number of paper layers within a stack predetermined and adhered to.

After the complete stack has been formed, in order to move the collecting device to make ready for the subsequent stacking process immediately, according to an additional embodiment provided that the counter means with a drive for releasing or pivoting away the holding means of the collecting device in operative connection stands.

At the beginning of a new stack formation must be prevented that the first paper layer entering the collecting device through the conveying section is raised, vas achieved according to an advantageous embodiment, that a signal transmitter responding to the position of the holding means is provided, Velcher, on the one hand, monitors the function of the other upstream signaling devices and on the other hand in operative connection with the drive means for lowering the conveyor section stands.

For security reasons, there is an additional feature that the Drive means for the conveyor section, a switching means for limiting the conveyor section in an upper end position and a switching means for limiting in a lower one End position is assigned.

Deputy: paper layer stack-schiePe level addition - A 32 Hamburg, 15. March 1977 The feeder for feeding paper layers to the collecting device is expediently controlled by giving him a responsive to incoming paper layers Switching means for engaging a self-switching after a conveying cycle clutch is assigned.

Stw .: paper layer stack-inclined plane-addition - A 32 Hamburg, the 15. March 1977 The invention is explained below with reference to one in the drawing by several Figures illustrated embodiment explained in more detail.

FIG. 1 shows a schematic side view of a web of the invention Transport and collection device for layers of paper, figures in different operating states the collecting device 2 to 5 in a schematic representation, Figure 6 is a circuit diagram for the control of the pivotable conveyor section, FIG. 7 is a circuit diagram for the transport control of the paper layers and FIG. 8 a circuit diagram for the counting control of the paper layers.

Stw .: paper layer stack-inclined plane-addition - A 32 Hamburg, the 15. March 1977 According to Figure 1 is a collecting device 1 in the conveying direction (arrow 2) seen a feed conveyor 4 having a belt web 3 for feeding in layers of paper 6 upstream and a conveyor 8 having a belt web 7 for conveying away of paper layer stacks 9 downstream. The feed conveyor 4, the discharge conveyor 8 and the Bottom of the collecting device 1 have a continuous one arranged in one plane Slideway 11 on. The means of transport are supplemented by an endless, transport chain 12, only indicated by dash-dotted lines, on which as a driver for the paper layers 6 or paper layer stacks 9 transport fingers 13 are arranged, which extend transversely through the slideway and in its longitudinal direction of the transport chain 12 in corresponding slots of the slide 11 or on their Outer edges are movable along.

The transport fingers 13 are also by means of a pivot pin 14 pivotally mounted on the transport chain 12 and below the slide 11 in the main application described in more detail manner deposited or guided on guardrails.

These guardrails have a in the area of the collecting device 1 guide section also shown and described in more detail in the main application on, which can be moved out of the path of movement of the transport finger 13.

The collecting device 1 is assigned directly to one from the conveying level ausschuenkbaren conveyor section in the form of a lap plate 16, which around a The axis of rotation 17 lying parallel to the conveying plane can be pivoted out of the slideway 11 is and forms a kind of conveyor ramp for the paper layers 6.

A drive is provided for the pivoting movement of the folding plate 16, which consists of a motor 18, a nut 19 and a spindle 21.

The transport chain 12 is driven with the transport fingers 13 via a coupling 22 and elliptical wheels 23 at one revolution per transport chain cycle.

Stw .: paper layer stack-inclined plane-addition - A 32 Hamburg, the 15. March 1977 On the side of the collecting device opposite the hinged plate 16 1, a holding means in the form of a stop plate 24 is provided, which extends transversely to the slideway 11 through this. The Arschlagblech 24 is for Execution of an exchange movement from the conveying level with corresponding actuation and control means are provided. The actuating means for the exchange or transverse movement of the stop plate 24 for moving outward from or inwardly into Conveyor track consists of a lifting table 26 on which the is about a fixed axis 27 pivotable stop plate 24 is supported with a roller 28 at the end.

A cam disk drive is used to move the lifting table 26 up and down 29 and a transmission linkage 31, which has a roller 32, two stationary pivot axes 33 and 34 and two joints 36 and 37.

In addition, the device according to FIG. 1 has several control means assigned, the position of which is for the most part only shown by arrows is, whereby the linkage of the individual control elements for the purpose of operating the individual Sections of the device are explained in more detail below with reference to FIGS. 6 to 8 are.

The feed conveyor 4 is a switching element designed, for example, as a photocell 38 assigned, which registers incoming paper layers 6 and switches on the clutch 22 is used, which switches itself off again after one revolution.

A contactless switch is provided as a further control means 39 on the bottom of the collecting device 1, a contactless switch 41 on the hinged plate 16, a light barrier 42 on the hinged plate 16 and a counter means 43, which the previously mentioned tax means is upstream. The stop plate 24 is a switching element 44 assigned, while the actuating means 21 for the hinged plate 16 is an upper Limit switch 46 Stw .: paper layer stack-inclined plane-addition - A 32 Hamburg, March 15, 1977 and a lower limit switch 47 is assigned.

Furthermore, the actuating linkage 31 for the lifting table 26 with a lock 49 operable by a magnet 48 is provided.

According to Figure 6, the control and actuation means for the and Abvärtsschuenken the glappbleches 16 linked together in the following manner The set input of a memory 51 for pivoting the hinged plate 16 upwards is via an AND link 52 with the switch 39, the light barrier 42, the Switch 41 and the switching element 44 connected, the signals of the switch 41 and the switching element 44 are negated by a NOT element 53 and 54, respectively are.

The delete input of the memory 51 is via an OR operation 56 connected to the light barrier 42, the switching element 44 and the upper limit switch 46, the signal from the light barrier 42 being negated by a NOT element 57. Of the The output of the memory 51 is with the motor 18 for actuating the hinged plate 16 tied together.

The set input of a further memory 58 for swiveling down the Hinged plate 16 is via an AND link 59 to the switching element 44 and the Switch 41 connected, the signal of switch 41 through a NOT element 61 is negative.

The clear input of the memory 58 is via an OR link 62 connected to the lower limit switch 47. The output of the memory 58 is again connected to the motor 18 in the sense of a pivoting of the hinged plate 26. In addition, the clear inputs of memories 51 and 58 are mutually exclusive of theirs Outputs with a locking signal 63 resp.

64 can be loaded.

According to FIG. 7, the set input is used to control the transport of the paper layers 6 a memory 66 with the switching element 38 and Jam .: Paper layer stack crooked Level addition - A 32 Hamburg, March 15, 1977 its extinguishing input via an OR link 67 also with the switching element 38, whose signal is negated by a NOT element is, as well as connected to a switch 38a of the clutch 22. The output of the memory 66 is connected to the drive of the coupling 22.

According to Figure 8, the counting switching element 43 for the counting control of the paper layers 6 on a counter 69 which counts on a predetermined number of in the Collecting device 1 to be stacked paper layers 6 is adjustable. The outcome of the Counter is led to the set input of a memory 71, the clear input with the lower limit switch 47 is in connection. The output of memory 71 is connected to the magnet 48.

The following is the mode of operation of the collecting device on the basis of Figures 1 to 8 explained in more detail as soon as one is conveyed by the belt conveyor 3 Layer of paper 6 passes the switching element 38, this sends a signal to the memory 66 according to FIG. 7, the output signal of which is the clutch 22 for driving the transport chain 12 switches on, whereby the clutch switches itself off again after one revolution.

This is illustrated in Figure 7 by the switching element 38a, its Delete signal together with the negative signal of the switching element 38 the memory clears. As the transport chain 12 starts up, the transport fingers are continuously lost 13 in the transport level or the slide 11 pivoted so that a first Paper layer, which is designated by 6a in FIG. 2, is gripped by a transport finger 13 and is pushed over the hinged plate 16, which is not swung out, since the switch 39 in the collecting device 1 has not yet registered any paper layer and consequently no signal to the memory 51 via the upstream AND element 52 can give. As well as the Deputy: paper layer stack-inclined plane-addition - A 32 Hamburg, March 15, 1977 Transport finger 13 the paper layer 6a into the collecting device 1 has pushed up against the stop plate 24, after which the transport finger 13 on is moved out of the transport level as described in the main application, the switch 39 in the collecting device 1 registers the paper layer located therein 6a according to FIG Paper layer 6 registered and the light barrier 42 against a sheet metal edge 73 of the collecting device 1 or against the paper layer 6a, the switching element 44 there is no signal due to the pivoted-in stop plate 24, lie on the AND element 52 of the memory 51 to four signals, so that the memory is set. That on his The signal appearing at the output sets the motor 18 in operation, which via the mother 19 and the spindle 21 pivots the lap plate 16 out of the slide 11 upwards. As soon as the hinged plate has reached a swivel position in which the light beam the light barrier 42 is no longer interrupted by any paper layer or via their Can look over the upper edge, the signal of the light barrier 42 disappears, velches if the answer is negative, in turn a clear signal via the OR gate 56 to the memory 51 there. Thus, the decreasing output signal of the memory 51 turns the motor 18 for pivoting the hinged plate 16 stopped. Meanwhile, a new one has arrived Paper layer 6b, the transport chain 12 again Pür a new FRird cycle according to FIG 4 set in motion.

Since the switch 41 of the hinged plate 16 this newly arriving paper layer 6b registered, it prevents that through the incoming paper layer 6b concealed light barrier 42, the hinged plate 16 is raised again further.

The second paper layer 6b is thus vied over the front edge of the hinged plate 16 pushed onto the paper layer 6a already located in the collecting device 1.

It is assumed that in the collecting device 1, a stack of paper layers verden formed from two paper layers 6a and 6b Jam .: Paper layer stack crooked Level addition - A 32 Hamburg, supposed to be March 15, 1977. In this case the counter is 69 of the counter switching element 43 to this predetermined number of two layers of paper set. As well as the counting switching element 43 these preset two paper layers has registered (FIG. 8), an output signal of the counter 69 is sent to the set input of the memory 71 given, at the output of which a signal appears which the magnet 48 according to FIG. 1 for pivoting the lock 49 away. This is the transmission linkage 41 unlocked for the lifting table 26, so that the roller 42 when reaching the falling Branch of the lCurvenscheibenantriebes 29 the transmission linkage 31 in the sense of a Upward movement of the lifting table 26 is pivoted. This makes the stop plate 24 pivoted about its pivot point 27 and emerges from the sliding plane 11 downwards. The assigned one, in this case according to the main registration, not from the transport level Tipped out transport finger 13 pushes the through the two paper layers 6a and 6b formed paper layer stack according to FIG. 5 out of the collecting device 1. When the stop plate 24 is pivoted away, the switching element 44 emits a signal and interrupts the function of the switches 39 and 41 as well as the light barrier 42 according to Figure 6, so that an unintentional upward pivoting of the hinged plate 16 is prevented will.

At the same time, the switching element 44 gives a signal to the AND gate 59 of the memory 58 for lowering the hinged plate 16, so that the output signal of the memory 58 activates the motor 18 in the sense of a downward movement of the spindle 21. As soon as the lower limit switch 47 is actuated, it sends a clear signal to the memory 58, the output signal of which stops the motor 18. At the same time there is the lower one Limit switch 47 sends a clear signal to memory 71 according to FIG. 8, its output signal the magnet 48 in the sense of a locking of the transmission linkage 31 by the Lock 49 activated.

The stop plate 24 is thus swiveled into the sliding Deputy: Stack of paper layers inclined plane addition - A 32 Hamburg, March 15, 1977 bahn 11 erected again, the switching element 44 having the function of the switches 39 and 41 and the light barrier 42 restores. In this way is the collection facility 1 again prepared for a new stack formation.

In the event that more than two layers of paper 6 are piled up in a stack are to be verden, the counter 69 is set to the corresponding number of paper layers 6. In this case, the hinged plate 16 is so often at the level of each in the collecting device 1 located paper layers are raised until the counter 69 after reaching the preset Number of paper layers the stop plate 24 is moved out of the slideway 11. The maximal The pivoting position of the hinged plate 16 is marked by an upper limit switch 46, when it is reached according to FIG. 6, the motor 18 to prevent damage in each Trap is finally shut down.

It should also be mentioned that the control of the stack formation on different Manner, such as electrical, pneumatic or the like.

The advantage achieved by the invention is that the collecting device or devices of one or more parallel, the paper sheets delivering Lanes only then release a stack of layers if the prescribed number of layers of paper is reached within a stack of layers.

In this way, there are always complete stacks of layers on each lane put together for packaging, for example.

It has also been possible to create a safe using simple means Stack formation with preselectable different number of layers of paper to be stacked to achieve by the folding plate forming a conveyor ramp always to the correct one Time is swiveled out to the respective stack height.

Claims (7)

Set '.: paper sheet pile-inclined plane-addition - A 32 patent claims 1. Control arrangement for a device for superimposing layers of paper to a stack, with a collecting device for the paper layers, a feed conveyor for conveying the paper layers to the collecting device as well as a conveyor to the Conveying the stack of paper layers away from the collecting device, whereby the feed conveyor, the bottom of the collecting device and the discharge conveyor are arranged in one plane, and the feed conveyor has a conveyor section which is arranged around a in bzv. axis of rotation lying parallel to the conveying plane in such a way out of the conveying plane can be pivoted out that its respective discharge end adjacent to the collecting device occupies the height of the paper layers located in the collecting device and one Forms the conveyor ramp for the subsequent paper layers, as well as the Saimeleinrichtung holding means and control means PUr delimiting the outlet side of the conveying section and the holding means MCh patent ... Patent application P 26 48 032.0, characterized in that that the control means on the position of the pivotable out conveyor section (16) responsive signal generator (42, 46, 47) soie in the presence of paper layers (6) in the sanitation device (1) have responsive signal transmitters (39, 43) which so connected to a drive means (18) for swinging out the conveyor section are that with at least one paper layer in the collecting device, the drive means of the conveyor section is activated until the amount of each in the collecting device located Deputy: paper layer stack-inclined plane-addition - A 32 Hamburg, March 15, 1977 paper layer or layers has been reached and activated as often as required is reached until a predetermined number of layers of paper is reached in the collecting device is. 2. Control arrangement according to claim 1, characterized in that the signal transmitter (42) which determines the pivoting position of the conveyor section (16) a paper ply (6) passing through the conveying section responsive signal generator (41) is assigned. 3. Control arrangement according to claim 1 and / or 2, thereby characterized in that the signal generator for registering a paper layer (6) or respectively. one predetermined number of paper layers in the collecting device (1) from a sensor means (39) in the area of the collection facility or one upstream of the signal transmitter (42) Counter means (43) exist. 4. Control arrangement according to one or more of claims 1 to 3, characterized in that the counter means (43) with a drive (48, 49; 29, 31, 26) to release or Pivoting away the holding means (24) of the collecting device (1) in operative connection stands. 5. Control arrangement according to one or more of claims 1 to 4, characterized in that a responsive to the position of the holding means (24) Signal generator (44) is provided, on the one hand, velcher the function of the upstream Signal transmitter (39, 41, 42) monitored and on the other hand with the drive means (18) is in operative connection for lowering the conveying section (16). 6. Control arrangement according to one or more of claims 1 to 5, characterized in that the drive means (18) Stw .: paper layer stack-crooked Level addition - A 32 Hamburg, March 15, 1977 for the conveyor section (16) Switching means (46) for limiting the conveying section in an upper end position and a switching means (47) assigned for limiting in a lower end position is. 7. Control arrangement according to one or more of claims 1 to 6, characterized in that the feed conveyor (4) for feeding in layers of paper (6) to the collecting device (1) a switching means which responds to incoming paper layers (38) for engaging a clutch that disengages itself after a delivery cycle (22) is assigned.