NO810047L - PROCEDURE AND DEVICE FOR STACKING STABLE GOODS - Google Patents

Abstract

1. Device for stacking stackable material, especially mineral fibreboard (21) in a production line, in layers (22), arranged one above the other, consisting of one or more articles, a) with a lifting device (24 or 25) for layers (22) of the articles for vertically displacing the layers (22) when the stack is being formed, b) with a fixed, lower stack support surface (30), c) with a stop (47), arranged in the entry direction of the layers (22) and behind the stacking space (23), for a recorded stoppage of the respective new layer (22) entered, and d) with a conveyor device (rollers 45, delivery belt 20) for conveying away the prepared stack, e) with supporting elements, working in an aligned manner for the lifting movement at least approximately parallel to the stack support surface (30), for the layers (22) being provided in the form of fork arms (41, 42 and 43, 44), which can be moved in from the side under the stack and, after lifting has been effected, can be moved out again from the stacking space and f) with the lifting device (24 or 25) having sets of fork arms (41, 42 and 43, 44), which are arranged on both sides of the stacking space (23) and can be driven synchronously in opposite directions in the horizontal direction and in the same direction in the vertical direction, and each of which reaches less than half way across the width of the stack support surface (30), characterised in that, g) two lifting devices (24, 25) are provided, the respective fork arms (41, 42 and 43, 44) of which are retained relatively moveable in the vertical direction relative to those of the other lifting device (25, 24), h) the fork arms (41, 42 and 43, 44) of both lifting devices (24, 25) are mounted by means of distance pieces (37, 38, 39, 40), at a distance corresponding to at least the lift height (h1 ) of the working stroke, in the case of one lifting device (24) at the upper side of lower layer portions and in the case of the other lifting device (25) at the lower side of upper layer portions of the associated lifting device (24 or 25), and i) the fork arms (41, 42) of one lifting device (24), relative to the fork arms (43, 44), located on the same side of the stacking space (23), of the other lifting device (25), are offset laterally to an extent anabling the fork arms to run past one another vertically, and pass through the latter during the relative vertical movement.

Description

The invention relates to a method and a device for stacking stackable objects, in particular mineral fiber boards in a production line, according to the preamble

in claims 1 and 14 respectively. requirement 5.

A number of methods and devices for stacking are already known, where the stack is built up from below in such a way that the partial stack formed at any time can be lifted and a new layer can be driven under the partial stack and placed on its underside.

From French patent document 15 73 293 there is e.g. a stacking device is known, where fork-shaped support elements simultaneously engage between the rollers for a runway that forms the stack's support surface, under the layer of objects lying on this runway, and lift this layer so high that a new layer can be pushed onto the stack's support surface, after which the new layer is fed together with the lifted layer to form a partial stack.

In this case, the layers consist of packages. When the new packaging layer has been pushed onto the stack support surface, the lifted partial stack is lowered using the support elements or of the associated lifting device, and the support elements on both sides move in the opposite direction from the sub-stack on the sides, so that it rests on the new layer. Then the support elements of the lifting device are lowered and grip again from both sides between the rollers for the runway which form the stack support surface to lift the formed partial stack again and make room for a further new layer. After introducing the new layer into the stacking room, the partial stack is again lowered onto the new layer.

This method is relatively slow. The useful stroke for forming the pile consists exclusively in the fork-shaped support elements lifting the sub-pile in preparation for the introduction of a new layer, while the strokes for lowering the sub-pile onto the new layer - lateral extension of the support elements below the plane of the new layer - new lateral insertion of the support elements under the new layer provide dead times, which do not contribute to building up the stack and in which a new layer that is ready for stacking must wait in front of the entrance to the stacking room. As the movement speed of the support elements is limited due to the mechanical load, a correspondingly large time requirement arises for the stacking of the individual layers. As the lifting movement of the useful stroke can occur approximately as quickly as the lowering movement and significantly faster than the entry and exit movements with a longer range of movement, a very high dead time, compared to the time required for the useful stroke, becomes unavoidable.

In order to avoid such long, system-related dead times, it is known from German publication 23 64 751 to work with two lifting devices, whose fork-shaped support elements also support the partial stack and the new layer over the entire width. Then the partial stack is first lifted with the support elements for one lifting device, so that a new layer can be driven into the stacking space. While the support elements of one lifting device hold the sub-pile above the plane of the new layer, the support elements of the other lifting device stand below the plane of the new layer. In the event of a horizontal relative movement between the stack and the lifting devices, the support elements for one lifting device are then pulled out of the sub-stack on

one side, while the support elements for the other lifting device run under the new layer from the other side. While the support elements for the latter lifting device lift the partial stack which is set down on the new layer together with it, the support elements for the second lifting device are lowered again and are ready to engage under the next new layer, when corresponding horizontal relative movement takes place.

In this way, the system-related dead times are theoretically reduced to approximately half, as the two lifting devices work alternately and thus with a full working cycle for a lifting device, which consists of the single cycles of lifting - driving out - lowering - driving in, to at any time two new teams are added to the sub-stack. But in practice there is no reduction in the time required for stacking a new layer, as the lifting devices on the one hand become much heavier, as the support elements for each lifting device as a result of the stack's total weight, e.g. in the case of a package stack, is loaded with a large weight arm, and because the stretches for the entry and exit of the support elements are more than doubled, compared to support elements that intervene from both sides. Therefore, larger masses must be accelerated in total and longer distances must be covered, so that the theoretical advantage of the alternating working method for two lifting devices does not pay off in practice.

From German Begrauchsmuster 72 20 758 or US-PS

34 42 400, a further variant of such a method for stacking from below is known, where the stack support surface acts as a lifting platform and at all times the bottom layer of the lifted partial stack in the lifted position of the lifting platform is gripped by the support elements for an upper holding device, which holds the partial stack in a raised position, after which the lifting platform can be lowered for driving in a new layer. In order that at all times the bottom layer when supported in the raised position is not burdened by pressure against the sides, which is not acceptable with the packaging layers stacked there and also not in most other cases, the support elements of the holding device are likewise fork-shaped and horizontally displaceable, so that they can be pulled out from the area under the previously formed partial pile to both sides. The lifting platform must first lift the bottom layer so high that it is immediately in contact with the underside of the partial stack or the support elements, whereupon these can be pulled out at the same time as the partial pile is placed on the new layer. Then, a further lifting movement of the lifting platform can take place, until the bottom layer has reached higher than the plane of the support elements, so that these can be driven in again and can support the new bottom layer with the partial stack on top in the lifted position when the lifting platform is lowered again.

But neither does such a vertical, stationary holding device provide increased work speed, compared to the first-mentioned stacking method according to French patent 15 73 293, as the lifting and lowering movement of the support elements according to the French patent document is only replaced by a corresponding lifting and lowering movement of the lifting platform, while the dead time for the support elements' entry and exit to the sides remains unchanged. Nor can a new layer be driven in, until the lifting platform, which forms the support surface of the stack, has been driven back to the lower position so that, with regard to the time required for stacking a new layer, the same conditions as discussed above in connection with the aforementioned French patent document are obtained.

The method according to the invention is based in the preamble of the main claim on the method according to German Gebrauchsmuster 72 20 758, where the new layer is united with the previously formed sub-stack by the new layer with its upper side first being placed against the underside of the previously formed sub-stack and the new layer then together with the partial stack resting on it, is lifted above the working lift. This requires that the support elements on the underside of the previously formed sub-pile must be pulled out between this and the new layer, before the work lift can take place.

In the preamble to claim 5, the invention is based on the device according to German publication 23 64 751, where the supporting surface of the stack is stationary and two are arranged instead. alternately active lifting devices. Despite the alternating working method of two lifting devices, in practice, for the reasons discussed in more detail above, no significant reduction in the time required occurs, as due to the significantly greater mechanical load, larger masses must be accelerated and braked and, moreover, larger distances must be covered.

Starting from the mentioned state of the art, the task underlying the invention, both with regard to the method and the device, is to further develop the stacking method according to German Gebrauchsmuster 72 20 758 respectively. the stacking device according to German specification 23 64 751 in such a way that it is possible to achieve a significant increase in the stacking speed in the simplest possible way. This will enable the use of the method according to device according to the invention, especially for stacking mineral fiber boards in a production line with a continuous and rapid sequence of mineral fiber boards or formations.

As far as the procedure is concerned, this task is solved by the characterizing features in claim 1.

As the previously formed sub-pile is lifted independently of the new layer according to the features specified in claim 1, it is not necessary to wait with the useful lifting until the support elements have been pulled out from under the formed pile in order for the sub-pile to be able to be lifted together with the new layer . Rather, the partial pile can be lifted separately from the new layer

a height that allows the team's lifting movement in such a way that the new team can run its total lifting movement in one.

At the end of the lifting movement, or already while this is in progress, lowering of the partial pile on the new layer can take place or at least begin when the support elements are pulled out. If the previously formed sub-pile is then, as stated in claim 2, lifted at the same time as the new layer, but possibly to a lower height than the new layer, a soft lowering of the previously formed sub-pile with a low drop height occurs on the new layer. However, the partial stack's lifting movement can e.g. also happen before the new layer's lifting movement and/or to the same extent as the lifting movement of the new layer, and any gap between the underside of the sub-pile and the top of the new layer is covered by a corresponding lowering or falling movement of the sub-pile.

in any case, the new moves achieve a lifting movement of the sub-pile, which can be controlled independently of the lifting movement of the new layer, so that the useful lifting of the new layer can take place in one, and where the laying of the sub-pile on the upper side of the two layers can possibly begin at the same time .

In order to solve the task set in terms of the device, the starting point is two lifting devices that work alternately. With the help of the features stated in claim 5, it has been achieved that such an alternating mode of operation for two lifting devices can also take place, when each lifting device e.g. in the manner as in and for. is known from French patent document 15 73 293 comprises support elements that can be driven into and out of the stacking space from both sides, so that it is not necessary to resort to the heavier design of lifting devices with longer exit and entry distances according to the German design. document 23 64 751. Alternatively, however, it is possible to use a design of the lifting device and the support elements over the entire width of the stack according to German publication document 23 64 751. In this case, however, two lifting devices with support elements are arranged on each side of the device's stack space which extends over the entire width of the stack, so that one of the four sets of support elements can perform a working lift, while the other three sets of support elements perform the empty strokes, extension - lowering - entry. The alternating working method of four lifting devices means that a lower absolute speed of the machine parts is required at a given working pace or stacking speed. In any case, the support elements for a lifting device according to the invention are not only relatively movable in the vertical, but also in the horizontal direction in relation to the elements for at least one other lifting device. An alternating mode of operation of support element sets which are arranged on the same side of the stack is achieved by the support elements for one lifting device passing through the support elements for another lifting device which are arranged on the same side of the stack space by a vertical relative movement, so that e.g. the fork-shaped support elements for different

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lifting devices can alternately stand above and below each other.

In the case of the stationary pile support surface, compared to a design of the pile support surface as a lifting platform, it is achieved that the support surface is immediately free for driving in the next layer immediately after lifting the driven-in new layer.

In this way, when using the method according to the invention as stated in claims 14-18, the significant advantage is achieved that each new layer that is driven onto the support surface is immediately lifted to a new height plane, which allows the subsequent layers to be driven in, and remains at least at this height -plan during the further work steps. Thus, the stacking room is immediately available for driving in a new layer after lifting one layer, and the work steps necessary for preparing the lifting of the new layer can be carried out, while the new layer is driven into the stacking room. With a suitable design of the control and lifting device, the theoretically shortest possible distance between successive layers that are driven into the stacking space is thus achieved at the time interval that is necessary for a layer that has been driven into the stacking space to be lifted from the stacking support surface at such a height that a new layer can be driven in under the layer that has just been driven in.

In the following, the invention will be described in more detail with reference to some embodiments shown in the drawing. Fig. 1 shows in two parts, I and II, on two drawing sheets a schematically simplified outline of a production line for the production of mineral fiber boards with stacking in a device according to the invention and subsequent packaging. Fig. 2 is a schematically simplified rendering in perspective of the essential parts of a device according to the invention and the relative position of the parts, where the upper lifting device with its support elements for better clarity is rendered as if it had been copied and drawn upwards from the lower lifting device and the pile support surface . Fig. 3 reproduces the details a-d in the form of a schematic illustration of a possible way of working for the device according to fig. 2. Fig. 4 reproduces the details a-k in the form of a schematic illustration of another possible way of working of the device according to fig. 2 and shows at details 1-v a schematic illustration of the stacking room, seen from the side facing a part of the production line where each detail 1-v corresponds to one of the positions of the device according to the invention according to details a-k. Fig. 5 shows details a-e on a larger scale of the positions of the support elements in the dashed circles Va, Ve in fig. 4c and d, while the elements run through these positions, as well as intermediate positions. Fig. 6 shows details a-k in the form of a schematic

illustration of a working method which essentially corresponds to fig. 4 for an embodiment of the device according to the invention which is somewhat modified in relation to fig. 2.

Although the invention is not limited to use for stacking mineral fiber boards or similar boards in a production line, it is shown in the following with the help of fig. 1 the structure and working method of such a production line as an application example, the method and device according to the invention being particularly suitable to meet the requirements set in connection with such or a similar, continuously working production line.

The mineral fibers, which are produced in a known manner and delivered from fiber production heads, are supplied with additives such as binders and are continuously added to further processing, e.g. drying to form fiber pile, on a conveyor belt. The end 2 of the conveyor belt is in fig. 1 indicated in the production line's the front end of the production device in the direction of movement, as shown by arrow 1. If

narrower mineral fiber boards are to be produced than the production width that results from the device and the number of fiber production heads, the felt can be folded during transport in a manner known per se, e.g. using high-pressure water jets is cut into several longitudinal strips 21a, 21b. At the end of the conveyor belt 2, a saw 3 is arranged, which cuts the felt across the direction of the production line according to arrow 1 to give the mineral fiber boards the desired length.

The plates that come out at the back of the saw 3 are taken over

of a belt 4, which runs at the same speed as the conveyor belt 2 and transports the plates to a selection device 5.

In connection with the rolling device 5 follows an acceleration belt 6, which accelerates the plates leaving the rolling device against the speed of the conveyor belt 2 and the belt belt 4 and spreads the plates so that a distance is formed between the successive plates. From the acceleration belt 6, the thus spread plates come via a straightening belt 7 to a stowing belt 8 and thereby pass rail-shaped straightening elements 9a and 9b, which straighten the supplied plates opposite the central axis of the production line and close the gaps between plates that lie next to each other. At the end of the stowage band 8, a stowage stop 10 is arranged, e.g. in the form of a series of stowage bolts, by means of which the plates which are emitted at the speed of the acceleration belt 6 via the straightening belt 7 to the stowage belt 8, can be selectively stopped.

Behind the stowage stop 10 follows a stacking device which is generally denoted by 11 and whose structure and mode of operation will be discussed in more detail below. In the stacking device 11, the incoming plates are stacked one above the other, until the desired stacking height is reached, after which the finished, package-like stack goes in the direction of production according to arrow 1 and on the back of the stacking device 11 runs up an outlet belt 20 and, depending on the plate type and for -packing type is led to a connected packaging station 12, 13 or 14. For this purpose, the plates from the discharge belt 20 first go to an angular transfer station 15, from which the transfer takes place either to one side on conveyor belts 16a and 16b or to the other side on a transport device 17 or continued in the production direction to a further angle handover station 18. From station 18 the plates go to a further angle handover station 19 in the extension of the transport device 17 at the inlet to the packaging station 12. The packaging station 12 can thus be reached from the angle handover station 15 either via the transport device 17, where the stacks are turned 90° to the orie The knotting on the outlet belt 20 as a result of the transport device 17's curvature (cf. fig. 1, part II), or via angle transfer stations 18 and 19, between which only a parallel displacement of the stack takes place, so that its orientation on the belt 20 does not change.

The structure of the end part of the production line with the stacking device 11, which is briefly discussed above, will be described in more detail in the following with the help of a concrete embodiment of the method. The shown production line can be created for the production of mineral fiber boards with widely varying dimensions, e.g. a board length between 330 and 3200 mm, a board width between 250 and 1250 mm and a board height between 10 and 200 mm, where the fiber grain for the production of up to 5 boards of smaller width next to each other in the direction of the production line according to arrow 1 can cut into parallel strips in front of the saw 3.

As an example, it is assumed that plates with a length of 1500 mm and a width of 600 mm are to be produced. For this case, the arrangement at a specific point in time of the individual mineral fiber sheets 21 is marked with dashed lines on the production line. The production line's conveyor belt 2 can e.g. have a speed of 30 m/min. and leads .two strips of fiber material 21a and 21b towards the saw 3. The saw 3 goes with

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a cycle rate of 20 min, i.e. it makes 20 cuts per minute at equal intervals, so that the strips 21a and 21b in the area of the saw 3 get a cross cut with distances of 1500 mm. In the selected rendering, just such a cut is made in the saw's 3 area. The saw-formed mineral fiber plates 21 with a width of 600 mm, which corresponds to the width of the strips 21a and 21b, and a length of 1500 mm, go behind the saw 3 essentially without relative movement on the belt 4 to the rolling device 5. As soon as the rear ends of the mineral fiber plates 21 have left the engagement area of the rolling device 5, the mineral fiber plates 21, located in pairs next to each other, are accelerated by the acceleration belt 6. The acceleration belt 6 can, like the straightening belt 7 and the bulging belt 8 as well as the exit belt 20, have a speed of approx. 90 m/min., i.e. approx. three times as great a speed as the conveyor belt 2 and the belt belt 4. In this way, the adjacent pairs of mineral fiber plates 21 will be spread so that distances of the order of 3000 mm are formed between successive pairs of plates. At the speed of the faster belts 6, 7 and 8, this corresponds to a time interval between the trailing edge of a pair of mineral fiber plates 21 and the leading edge of the following pair of approx. 2 sec.

By means of the stowage stop 10 at the rear end of the stowage band 8 are a pair of mineral fiber plates. 21 just punched and subsequent pairs are seen just before it hits the rear end of the punched pair. With the help of a vibration detector, not shown in detail, which is arranged in the area of belt 8, the vibrations when a pair of plates bounces against the stop 10 can be measured, so that the stop 10 after a certain number of vibrations, in the example shown after two vibrations, is driven out from the transport path for a period of time that is necessary for a stacking layer 22 which is formed on the belt 8 and consists of several successively arriving plate formations to pass the impact area 10 with its trailing edge. In the selected instantaneous reproduction, the pair of plates 21 which comes after on the belt 8 will collide with the rear edge of the pair of plates 21 which has already been stopped after a scant second and they will cause the second vibration which is registered by the vibration detector, whereupon the stowage bolts which form the stowage stop 10 f. e.g. with the help of hydraulics can be lowered for a period of approx. 3 seconds, so that the layer 22 which is formed on the belt 8 of four mineral fiber plates 21 can run into the stacking device 11 without further relative movement. Of course, the rear edge of the plate formation that runs into the stacking device 11 can also be registered using a light counter or the like. , after which the stowage stop 10 again moves to the stop position and stops the leading edge of the following pair of mineral fiber plates 21.

In the area of the stacking device 11 there is a stacking space 23, where vertical stacking of a plurality of layers 22 takes place in the manner described in more detail below. In the example shown, it is assumed that in front of the two pairs of plates 21 which are arranged in the area of the belt 8, a first layer 22 has just been driven in for a new stack in the stacking device 10. Furthermore, it is assumed that a finished stack of a plurality of vertically stacked layers 22 is located in the area at the end of the exit belt 20, just in front of the angle transfer station 15. This finished stack is supposed to be transported via the angle transfer stations 18 and 19 to the packaging station 12.

In the chosen example, layer 22 which is formed on the upwelling belt 8 thus comes continuously, with a time interval of approx. 6 sec., into the stacking space 11 of the stacking device 11. Stacking of the layers 22 and stacking of the last layer 22 in the stack as well as removal of the finished stack must therefore take place during a cycle of approx. 6 sec. As will be readily apparent, the rate available in the stacking device 11 is even shorter when, at an unchanged production speed of 30 m/min., which corresponds to the conveyor belt 2 movement speed, smaller, favorable plate lengths are to be stacked, e.g. e.g. a plate length of somewhat more than half of the useful length of the stack space 23, e.g. of more than 1600 mm, when the stacking space 23 is assumed to have a useful length of 3200 mm. Then formation of plate formations in the area of belt 8 must be eliminated, so that the stowage stop 10 is submerged at all times and the plates or plate pairs 21, to whose width the adjustable straightening elements 9a and 9b are set, run into the stacking space 23 with undiminished speed , compared to the tapes' 6, 7 and 8 speed and without stop. It will be obvious that if the plate length is increased from

1500 mm, as in the example shown, to 1600 mm and immediate entry individually into the stacking space 23, a cycle speed of just over 3 seconds is available for stacking the individual layers 22 in the stacking device 11 and for stacking the stack's last layer 22, including removal of the finished stack. The cycle time required by the stacking device 11 is of course reduced even more if the production speed is to be increased to more than 30 m/min. At a set cycle time for the stacking device 11 of e.g. 2 sec. for each plate dimension that is produced and each stack design, a maximum permitted production speed of more than approx. 30 m/min. At a production rate of approx. 30 m/min. any stackable plate size at a usable length of 3200 mm of the stacking space 23 can be stacked without any problems with a cycle time of approx. 2 sec., and with favorable plate dimensions, without increasing the production speed, one can resort to slower operation of the stacking device 11 than the maximum possible.

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Instead of a beat number of 30 min which corresponds to a beat time of 2 sec., any lower beat number can be down to approx.

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4, 5 min is set.

The principle for the structure of the stacking device 11 will be described in more detail in the following with reference to fig. 2. According to this figure, a stacking device 11 according to the invention comprises two lifting devices 24 and 25, where the lower lifting device 24 on both sides of a stacking support surface 30 which limits the underside of the stacking space 23, comprises two lifting tables 26 and 27, while the upper lifting device 25 comprises two corresponding arranged lifting tables 28 and 29. The lifting tables 26, 27, 28 and 29 are, in a manner not shown, movable in vertical guides for a machine frame for the stacking device 11 in the directions indicated by the double arrows 31, which can be carried out using a number of constructive solutions . As lifting devices for the lifting tables 26, 27, 28, 29, e.g. hydraulic cylinders are used. The lift tables 26, 27 respectively. 28, 29, which form part of the lifting device 24 respectively. 25, moves synchronously in the direction of the double arrows at all times. For this purpose, the driving hydraulic cylinders can be volumetrically matched to each other, or another can be used, e.g. in and of itself known mechanical synchronous control. Since the lifting tables 26, 27 on one side and 28, 29 on the other side are moved synchronously up and down as a unit at all times, they together form a unified lifting device 24 or 25.

On the underside of the upper lifting tables 28, 29 for the upper lifting device 25, as in fig. 2 is shown as shifted upwards from the other parts of the stacking device 11 for reasons of clarity, there are arranged slides 35 and 36, which are horizontally movable as indicated by the double arrows 32. On the upper side of the lower lifting table 26, 27 for the lower lifting device 24 slides 33 and 34 are also arranged which are horizontally displaceable as indicated by the double arrows 32.

On the upper side of the lower slides 33 and 34, essentially horizontally oriented, fork-shaped support elements 41, 42 are attached via spacers 37 and 38 at a distance from the lifting tables 26 and 27 respectively. the slides 33 and 34. On the underside of the slides 35 and 36, via spacers 39 and 40, fork-shaped support elements 43 and 44 are attached with a vertical distance below the lifting tables 28 and 29 and under the slides 35 and 36. The fork-shaped support elements 41 and 43 with associated spacers 37 and 39 is on one side of the pile support surface

30 offset in relation to the support elements 42 and 44 as well as the spacers 38 and 40 on the opposite side of the stack support surface 30 in the production direction. as indicated by arrow 1, so that the support elements 41 and 43, as well as 42 and 44 can pass each other next to each other, when the lifting tables 26 and 28 respectively. 27 and 29 are moved towards each other in the direction of the double arrows 31. The vertical free height of the spacers 37, 38, 39 and 40 is thereby chosen so that the support elements 43

and 44 on the upper lifting tables 28, 29 by the closest possible arrangement of the lifting tables 26, 27, 28, 29 above each other during operation, lie at such a distance below the support elements 41 and 42 on the lower lifting tables 26, 27 that a new layer 22 of mineral fiber plates 21 can run onto the pile support surface 30 between the upper support elements 41 and 42 and the lower support elements 43, 44 respectively. the stacking support surface 30. Depending on the chosen working method for the stacking device 11, this maximum distance between the lower support elements 41 and 42 and the upper support elements 43 and 44 can also be made larger without difficulty by corresponding dimensioning of the spacers 37, 38, 39, 40, so that a mutual penetration of the support elements 41, 42 on the one hand and 43, 44 on the other hand is achieved to such an extent as is necessary for the working position during operation with a corresponding maximum distance.

However, the support elements 41 and 42 for the lifting device 24, as well as the support elements 43, 44 for the lifting device 25 are not placed with a hatch in the embodiment shown, but lie flush with each other in any operating position. In fig. 2, the horizontally movable slides 33, 34, 35 and 36 are shown in their innermost position, close to the pile support surface 30, where the support elements 41 and 42 on the one hand and 43, 44 on the other hand have their free ends at a small distance from each other . As indicated by the double arrows 32, all slides 33, 34 and 35, 36 can be driven along the lifting tables 26, 27, 28, 29 outwards, away from the pile support surface 30, to a position where the opposite ends of the support elements 41, 42 and 43, 44 have a mutual distance that is greater than the width of the pile support surface 30, measured across the production direction according to arrow 1, respectively. larger than the stack to be formed on the support surface 30. In such an outer position, the support elements 41, 42 and 43, 44 are driven out to the side from a stack or part stack that is formed on the support surface 30, while in the figure shown they are driven in and can lift a layer 22 on the pile support surface 30 from below and can support such a layer 22 in a raised position above the support surface 30. In fig. 2, the support elements 41, 42 for the upper lifting device 24 are driven under the stack support surface 30 and could thus lift a layer 22 from the support surface 30, while on the support elements 43, 44 for the upper lifting device 25, a previously formed partial stack could lie at a distance above the support surface 30.

The support surface 30 is formed by the top surfaces of the rollers 45 in a runway. The rollers 45 are arranged with a mutual distance that allows the simultaneous introduction of the support elements 41, 42 on one side and the support elements 43, 44 on the other side between the rollers below the support surface 30, but are otherwise arranged as close to each other as possible, so that they supports the layers 22 as evenly as possible on the upper roller rafts. For feeding the layers 22 in production direction 1 when the layers 22 are driven in and out, the rollers 45 can be driven in the direction indicated by arrow 46. They are continuously driven or driven as needed. Certain rollers 45 can have a rubber coating or another friction-increasing coating to achieve the desired acceleration of the layers 22, especially when the finished stack is to be driven out of the stacking space 23. In the stacking space 23 or at the rear end of the support surface 30, seen in the direction of the arrow 1, there is a stowage stop 47, which in the example shown consists of a number of bolts 48, which can be raised and lowered in the direction of the double arrow 49. In the raised position, the bolts 48 block the extension of a layer 22 on the support surface 30, so that the layer rests on the support surface 30, despite continuously rotating rollers 45, and can be lifted from the support surface 30 by the support elements 41, 42 or'43, 44 without relative movement. After the stack has been completed, the bolts 48 can be lowered, e.g. hydraulically, so that the finished stack can be driven by the rollers 45 in production direction 1 out of the stacking space 23 and onto the exit belt 20, which, at least in the area closest to the stacking device 11, can also be formed by rollers, which provide strong acceleration of the stack to the belt's 20 movement speed using

of a rubber or other coating.

Fig. 3 also shows the subsequent figures 4

and 6 only the structural parts which are necessary for the understanding of the stacking device 11 in an even stronger schematic simplification than fig. 2. Fig. 3 shows a possible method for operating the stacking device 11 according to fig. 2.

Fig. 3a illustrates a phase of the stacking, which has already led to the formation of a partial stack of two layers 22 and where the support elements 41 and 42 for the lower lifting device 24 have been driven under the support surface 30 and are ready for lifting the partial stack consisting of two layers 22 , while the support elements 43 and 44 have just been driven out between the two partial pile layers 22.

In preparation for driving in successive layers 22, the support elements 41 and 42 then lift the partial stack of the two layers 22 into the position shown in fig. 3b, where the new layer 22 is shown driven onto the pile support surface 30.

The run-in movement of the new layer 22 ends

of the stop 47, so that the new layer 22 lies on the support surface 30 flush with the lifted partial stack. Parallel to this, the support elements 43 and 44 for the lifting device 25 are driven down in a plane below the support surface 30. As clearly shown in fig. 3b, the support elements 43, 44 pass the plane in which the support elements 41, 42 for the lifting device 24 are located, and then rest under the plane of the support elements 41, 42. The mutual passage of the support elements

41, 42 and 43, 44 are made possible by the spacers 37, 38 and 39, 40, as discussed in more detail above, in connection with fig. 2, and in that the support elements 41, 42 on the one hand and

the support elements 43, 44, on the other hand, are mutually offset in relation to arrow 1, i.e. in a way they form openings for each other and thus do not collide with mutual vertical displacement.

When the new layer 22 according to fig. 3b is completely extended onto the support surface 30, the support elements 41, 42 for the lower lifting device 24 are extended by operating the slides 33 and 34 as shown in fig. 3c from the space between the new layer 22 and the previously formed sub-pile, possibly after a previous slight immersion to approximate the underside of the sub-pile to the upper side of the new layer 22, so that the sub-pile is placed softly on the new layer 22, which lies on the support surface 30. At the same time as the support elements 41, 42 move out, the support elements 43, 44 for the lifting device 25 run under the support surface 30 and are now in turn ready to lift the partial stack which now consists of three layers 22, see fig. 3c.

In fig. 3d shows the position of the support elements 43, 44 at the end of this lifting movement, where a further layer 22 is illustrated in a driven position on the support surface 30. Simultaneously with the lifting movement of the lifting device 25, the lifting device 24 is lowered into the position shown in fig. 3d, where the support elements 41, 42 for the lifting device 24 are ready to drive under the support surface 30 to the position shown in fig. 3a, when the support elements 43, 44 for the lifting device 25 again extend into the position shown in fig. 3a. In connection with the mentioned entry and exit of the support elements 41,42 respectively. 43, 44 from fig. 3d, a working position appears again as shown in fig. 3a, however with the difference that there are now four layers 22 on the support surface, instead of the two layers 22. Now the four layers 22 can be lifted to enable a fifth layer to be driven onto the support surface 30.

The control of the support elements 41, 42, 43 and 44 can be carried out as shown in fig. 3a-3d by the fact that, at any time, an opposite course is carried out in accordance with extension movement, so that by a precise anti-cyclical working method for the support elements 41, 44 or 43, 44 hardly any loss of time occurs. The significant advantage is then achieved that there is a mass equalization between the moving parts, so that extremely short cycle times can be achieved. In addition, the control is of course simplified, so that the lifting tables 26, 27 and 28, 29 e.g. compulsorily can be operationally connected via racks and gears.

The working method of the stacking device 11 which is illustrated in fig. 3, however, has the disadvantage that the already formed sub-pile, after driving a new layer 22 onto the support surface 30, must be set down on the upper side of the new layer 22 when extending to the sides of the corresponding support elements, after which the new layer 22 can be lifted together with the already formed partial stack, before a new layer 22 can be driven onto the support surface 30. But precisely this time span, during which a new driven-in layer 22 is stopped by the rear stop 47 and lies on the support surface 30, before it can be lifted, is critical insofar as it determines the required minimum distance between the rear edge of a layer 22 that has just been driven in and the front edge of the following layer 22 on the belt 8, as these two edges of the successive layers 22 must not collide. As each layer 22 usually has at least a length corresponding to half the length of the support surface 30, it takes a not inconsiderable time of approx. 2 sec. in the form of application shown in fig. 1. During this time, the support elements that lift the partial stack must remain in this position, before the upper partial stack can be laid down on the punched and resting new layer 22. While the time required for the actual lifting movement between figures 3a and 3b or 3c and 3d only amounts to approx. . 0.2 sec., the stacking device 1 1 must thus stop for approx. 2 sec. in the position reached in fig. 3b or 3c, in order to wait for the bottom layer 22 to be fully driven in, before the support elements that support the partial stack can be driven out to the side from this and can lay

the partial pile on the new team 22.

In the form of the working method for the device according to fig. 2 which is described in connection with fig. 4, a solution has been found, where the necessary temporal interval between the trailing edge of a layer 22 and the leading edge of a subsequent layer 22 is essentially limited to the time actually required for carrying out the lifting movement of a layer 22 which has been driven onto the support surface 30 and has stopped against the rear stop 47.

For clarification, it is in fig. 4a first shows an initial state, where both lifting devices 24 and 25 are in a lowered position such that all support elements 41,

42, 43, 44 lie below the support surface 30 and are ready for lifting movement. As fig. 4 1 also shows, a first layer 22^ which is driven onto the support surface 30 is precisely punched by the bolts 48 for the stop 47. As likewise illustrated in fig. 4 1, subsequently, second layer 222 aH-ere& e has arrived just in front of the stop 10 for the shoring path 8 and is thus ready for driving onto the support surface 30. For reasons of simplification, it is assumed in the present example that plate lengths in one piece are to be stacked as layer 22, as that it is not necessary to operate the stowing stop 10 for the formation of a plate formation of several successively stowed mineral fiber plates 2 1 .

From the position according to fig. 4a, the lifting device 25 is now first operated with the lifting tables 28 and 29 in such a way that the support elements 43, 44 penetrate the support surface 30 and travel up a distance h-^ (fig. 4b; m), so that the new layer 222 can drive onto the support surface 30 As a comparison of the positions of layer 222i belonging to Fig. 4 1 and 4 m illustrates, layer 222 is during this brief lifting movement, which e.g. can last for 0.2 sec., only moved a short distance towards the stacking device 11. The height h^corresponds to the sum of the thickness of each layer 22, a safety distance of e.g.

20 mm for driving in layer 222me-'--'-around the lower edge of the support elements 41, 42, 43 or 44 and the upper edge of layer 222 on the support surface 30 in addition to the maximum vertical thickness of the support elements 41, 42, 43 or 44 in the area of the team's 222 width, as well as a safety distance of e.g.

5 mm between the lower edge of the layer 22 on the support surface and the nearest upper edge of the support elements 41, 42, 43 or 44

in the area of the width of the layers 22.

After lifting layer 22^ according to fig. 4b and 4m via the lifting movement of the support elements 43 and 44 over the section h^, the support surface 30 is free for the introduction of the second layer 22,,, as shown in fig. 4c and 4n. As soon as layer 22, has reached the stop 47, the support elements 41 and 42 for lifting device 24 lift layer 22,, from the support surface 30 over the stretch h^. As shown in fig. 4d and 4o, layer 22^ is simultaneously lifted by means of the support elements 43, 44 a further distance h,,, which may correspond to distance h^ or may be somewhat smaller. At the same time as the further lifting of layer 22^, the movement of the supporting elements 43, 44 begins from the gap between layers 22^ and 222, so that in connection with the lifting movement of the elements 43, 44 over the stretch h2, which will make room for the subsequent layer 22,,, a soft closing of layer 22^ appears on layer 222, while the latter remains in the raised (stretch h^) position, which allows the driving in of subsequent layers 22^.

As shown in fig. 4e and 4p, the already added layer 22^ can be driven into the area under the lifted support elements 41, 42 on the support surface 30 and is in turn stopped by the stop 47. While layer 22^ is driven in, the lifting device 25 with its support elements 43, 44 lowered over the sum of the stretches h^ and h2, and the support elements 43, 44 are driven against each other under the support surface 30 in the position shown in fig. 4e and 4p, so that they are ready for the next lifting movement. This movement of the support elements down and in from the position according to fig. 4d to the position according to fig. 4e requires e.g. a time span of just under 2 sec., which corresponds to the order of magnitude of the time span that the leading edge of layer 22^ requires to come from the leading edge of the support surface 30 to the abutment 47. During this time, subsequent layers 22^ arrive in the manner shown in fig. 4p after at the same speed and will, when layer 22 reaches the stop 47, already with its leading edge stand just in front of the beginning of the support surface 30, as illustrated in fig. 4f and 4q. As a rule, the support elements 43, 44 have already reached their waiting position for the next lift, before the incoming layer 22 has reached the stop 47, e.g. as the position in fig. 4 p..

When the new layer 223 has reached the stop 47 according to fig. 4f and 4q, there is again a lifting movement of the support elements 43, 44 for the lifting device 25 over section h-^ and a simultaneous lifting movement over section h2 with simultaneous outward movement of the support elements 41, 42. This position is illustrated in fig. 4g and 4r, where the support surface 30 immediately after the end of the lifting movement of the support elements 43, 44 is free for subsequent layers 22^ to drive in, regardless of whether the support elements 41, 42 have already been fully extended or not. As a result of the larger stretch, the support elements' movement in and out usually lasts considerably longer, e.g. 1.5 sec., than the lifting movement over the stretch h^or h2, which can be completed within 0.2 sec. Therefore, the extension movement of the support elements 41, 42 after finishing the lifting movement of the elements 43, 44 over the section h^ and the parallel lifting movement of the support elements 41, 42 over the section h2 can be completed, while the leading edge of the subsequent layer 44^ already comes within the area of the support surface 30.

Fig. 4h and 4s illustrate the completed downward movement of the support elements in the uppermost position, in the present case of the support elements 41, 42, below the plane of the support surface 30 and the driving of the support elements 41, 42 to the starting position for the next lift while layer 22 moves on the support surface 30 against rear abutment 47. According

fig. 4i and 4t, the lower support elements 41, 42 are already ready for the next lift, when layer 22 reaches the stop 47, and can, if necessary, immediately lift the stopped layer 22 to make room for the next layer 22.

In the present case, however, it is assumed that only 4 layers 22 are to be stacked for one stack. Then the lowered support elements 41, 42 remain in the position according to fig. 4i and 4t, and the support elements 43, 44 will, possibly after a slight lowering, run out from the gap between the layers 22^ and 22^, so that the formed partial stack of three layers 22 is seen down on the layer 22^ which rests on the support surface 30 Thus the finished stack of four layers 22 stands on the support surface 20 as shown in fig. 4j and 4u, and the stop 47 is lowered, as shown in fig. 4 hours. The driven rollers 45 then accelerate the stack via its lowest layer 22 out over the rear end of the support surface and in parallel the next layer 22 runs onto the support surface 30 (Fig. 4v). As between the contact of the layer 22 with the stop 47 and the lowering of the stop, only the extension of the support elements 43, 44 is needed for the extension of the formed pile, the new layer 22 still remains at a distance behind the extending pile, which enables new driving up the bolts 48 behind the extending pile, so that the plate 22^ instead of the plate 22^ can act as a new first layer for a further pile according to fig. 4a and 4 1. During the extension of the stack from the support surface 30, there is sufficient time for the extended support elements 43, 44 to perform the lowering and driving-in movement, so that the lifting tables 26, 27 and 28, 29, as well as the slides 33, 34 and 35, 36 with the support elements 41, 42 and 43, 44 have again reached the starting position according to fig. 4a, when layer 22^ collides with the bolts 48, which have again been driven up. The cycle illustrated in fig. is then repeated. 4 for the teams 22.-22. with team 22 -220.

In 4 stay

In the working method according to fig. 4, the support surface 30 is thus released after running in a layer 22 in the fastest possible way, i.e. by immediately lifting the stopped layer 22 to the height h^ for the subsequent layer 22, while the time that the subsequent layer 22 needs to reach the rear stop 47 from the front edge of the support surface 30, is used to drive in the second pair of support elements 41, 42 or 43, 44, which are not in use for pushing off the layer 22 that has just been driven in, to the starting position for lifting the new layer-22 below, the support surface 30. Thus, the time that each layer 22 inevitably needs for driving in, during which time the driving-in layer 22 cannot be lifted because it is in motion, is utilized optimally, while this period of time is to be considered as dead time in the embodiment according to fig. 3.

With reference to fig. 5, it will now be described in more detail how the laying down of a layer 22 on a lifted, subsequent layer 22 is effected in detail, where the joining of the layers 22^ and 222 according to fig. 4c and 4d and corresponding fig. 4n and 4o are chosen as examples, and the right half of the schematic drawings in fig. 4c and 4d in the dashed circles Va and Ve are reproduced on a larger scale and with more details in fig. 5. Fig. 5a corresponds to the starting position for the joining according to fig. 4c and fig. 5e corresponds to the performed laying down of layer 22 on layer 222 according to fig. 4d.

In the example in fig. 5, it is assumed that each layer 22 consists of three mineral fiber plates 21 located next to each other, where each plate 21 protrudes somewhat above a third of the layer 22's width. As shown in fig. 5a, the support elements 42 and 44 are designed so that in a fully driven state they protrude to an area in the middle mineral fiber plate 21, which provides sufficient support during the lifting movement. The support elements 41, 42, 43, 44 taper in the direction of their free ends, where the lower edge is essentially horizontal, so that the upper edge of the support elements 41, 42, 43, 44 leans slightly down from the outside towards the center of the support surface 30. In the rendering according to fig. 5a is upper support element 44 at height h^ above the upper edge of lower support element 42, measured from upper edge to upper edge of support elements 42 and 44 in the non-tapering, outer side area. The design of the second, according to fig. 5 the left side of the stacking device II is of course completely symmetrical.

According to fig. 5b, the lower support element 42 now first lifts the layer 222 which has just been driven onto the support surface 30 to the height h^, while the upper support element 44 with the subsequently unsupported layer 22^ folds upwards by the small distance h2. The lifting height h^ can e.g. amount to 90 mm, while the lifting height h2 only amounts to 50 mm. In this way, the layers 22 and 222 are already brought together as much as possible during the common lifting movement of the support elements 42, 44. The lateral extension of the support element 44 can begin at the same time, although this is not absolutely necessary, as the lifting movement only has a very small time requirement of e.g. 0.2 sec., which is relatively small compared to the time required of 1.5 sec. for the exit movement, so that the time needed for lifting does not necessarily have to be used for introducing the exit movement.

However, the extension movement takes place in conjunction with the lifting movement to the position according to fig. 5b, and is further illustrated in fig. 5c, d and e. During the extension movement, the end of the support element 44 first releases the outer side edge of the middle mineral fiber plate 21 1 layer 22^, so that this can fall onto the corresponding mineral fiber plate 21 in the lower layer 222> Thereby, the outer mineral fiber plate 21 is retained by the layer 22^ of a side stop 50, so that it will not be torn away as a result of friction against the support element 44.

During the further extension of the support element 44, this comes out past the longitudinal gravity line of the mineral fiber plate 21, so that this plate according to fig. 5d on the inside tilts down and rests with its inner edge on the corresponding mineral fiber plate 21 in the lower layer 222. In the case of the illustrated, very thin mineral fiber plates, there is a certain risk in this connection that the inner edge of the outer mineral fiber plate 21 in layer 22 ^ as a result of springing back against the stop 50 will end up over the outer edge of the middle mineral fiber plate 21 in layer 22 ^, so that the two the mineral fiber plates 21 overlap each other with the edges of the stack. This risk is eliminated by the fact that the inner tip of the support element 44 due to the tapered design of the support elements lies at a clear distance above the inner, underlying surface area of layer 22^, so that the outer, upper mineral fiber plate 21 according to 5d will tilt significantly down. As the mineral fiber plate 21 is also pulled against the stop 50 during the tilting movement, as a result of friction from the support element 44, the outer mineral fiber plate 21 ends up in the position shown in fig. 5d, where it with its outer edge is in a way high-edged and is pulled away from the middle mineral fiber plate 21. Even with small tolerances, a gap is thus formed between the adjacent edges of the shown mineral fiber plates 21 in layer 22^, which certainly leads to inner edge of outer mineral fiber plate 21 falls next to the outer edge of middle mineral fiber plate 21 and does not rest on this, even when such an overlapping of the edges of the mineral fiber plates would be conceivable with little height or thickness of layer 222.

In fig. 5e is the support element 44 in the manner that

also appears from fig. 4d, pulled all the way out to the side for the stack space 23, which is limited on the sides by the stops 50. In the event of vibrations occurring, the outer mineral fiber plate 21 can now come into contact flush with the middle mineral fiber plate 21 or remain in sliding contact with the stop 50.

Fig. 6 illustrates a working method which in principle corresponds to fig. 4 for an embodiment of a stacking device according to the invention which is somewhat modified compared to fig. 2. In the embodiment shown in fig. 6, there are arranged four lifting tables 26a, 27a, 28a and 29a which are similar to the lifting tables 26-29 according to fig. 2, but these lifting tables each form their own lifting device 26a, 27a, 28a, 29a, as they can be moved up and down independently of each other. On the upper side of the lifting tables for the lower lifting devices 26a and 27a are again stored sleds 33a and 34a with vertical spacers 37a and 38a, on which fork-shaped support elements 41a and 42a are attached. In a similar way, the lifting tables for the upper lifting devices 28a and 29a are movable with sleds 35a and 36a, on which, via vertical spacers 39a and 40a at a distance below the lifting tables and sleds 35a and 36a, fan-shaped support elements 4.3a and 44a are attached. The support elements 41a-44a extend in the same way as the support elements 41-44 in the horizontal direction from each associated slide 33a-36a in the direction of the support surface 30. While the support rafts 41-44 extend slightly over half the width of the support surface 30 , and grips in pairs under the layers 22, the support elements 41a-44a, however, have a length that extends approximately over the entire width of the support surface 30, so that a single support element 41a, 42a, 43a or 44a can lift a layer 22. The spacers 37a-40a enable the same way as the spacers 37-40 according to fig. 2 a mutual penetration of the offset support elements 41a and 43a, as well as 42a and 44a on one side of the support surface for the stacks. Also in the embodiment according to fig. 6, assigned support elements on both sides of the support surface 30 can run flush with each other, which in the embodiment according to fig. 6 is the case with the support elements 41a and 44a on the one hand and 43a and 42a on the other hand. While the support elements which run flush with each other according to fig. 2, i.e. 41 and 42 respectively. 43, 44, are relatively movable in the horizontal direction and therefore do not touch each other, because in their most compressed position there remains a distance between the tips, such a mutual contact of the support elements 41a and 44a and 43a and 42a, which may run flush with each other, is excluded in that they have an unchanging horizontal distance from each other, i.e. move synchronously in the same horizontal direction. Due to the greater length of the support elements 41a-44a, the movement distances for entry and exit will of course be greater than was the case with the support elements 41-44, which in the case of production lines with a standard program with relatively large widths can be designed relatively short, as they only must protrude so far into the stack space 23 that they sufficiently support the large mineral fiber plates 21, so that particularly small entry and exit sections appear with corresponding time savings. The embodiment according to fig. 6, on the other hand, has the advantage that a total of four lifting devices 26a, 27a, 28a and 29a can work alternately and induce useful lift, so that the overall device can go slower to achieve a desired stroke rate.

In fig. 6a, a first layer 22^ has just been driven onto the support surface 30 and stopped by the rear stop 47, not shown in detail. In this starting position, all support elements 41a-44a are arranged at a level immediately below the support surface 30, with the support elements 41a and 42a driven under the support surface 30. This position essentially corresponds to the starting position for stacking device 11 according to fig. 2, as shown in fig. 4a and 4 1.

From the position in fig. 6a, the layer 22 that has just been driven in is now lifted by the support element 41a in the position according to fig. 6b, i.e. the section , so that the support surface 30 is freed for driving in subsequent layers 22,,. In fig. 6b, layer 222 is already in the run-in position on the support surface 30. This position essentially corresponds to the position according to fig. 4c and 4n for the embodiment according to fig. 2.

In fig. 6c shows an intermediate position below it after the following lifting movement. The support element 42a is then lifted again along the stretch h and thereby lifts the new layer 222, while the higher support element 41a with the layer 22 placed on it folds upwards with the stretch h2 and thereby runs out to the side from the gap between the two layers 22 and 222, as that layer 22 is laid down on layer 222- In fig. 6c, as in the subsequent figures 6e, 6g and 6i, the support element which runs out for the sake of clarity is shown to be extended quite far, although during the short lifting movement, even if the extension begins then, it has first spent a short part of the run-out distance, which is significantly longer than the lift-off distance. The position according to fig. 6c essentially corresponds to an intermediate position between fig. 4c and 4d respectively. 4n and 4o in the embodiment according to fig. 2.

In the position according to fig. 6d are the lifting and extending movements discussed in connection with fig. 6c finished, so that the support element 42a stands at the height h1 above the pile support surface 30, while the support element 41a is extended to the side between the layers 22^ and 222 and is located in a plane h^+h2 above the surface 30. During the extension movement of the support element 41a the support element 44a moved horizontally synchronously with the element 41a driven into the area below the support surface 30. In the position according to fig. 6d, the surface 30 is free for driving in subsequent layers 22^, as in fig. 6d is shown in the process of being driven onto the support surface 30. 6d thus corresponds to fig. 4e and 4p in the embodiment according to fig. 2.

In fig. 6e again shows an intermediate position during the now following lifting movement of the support element 44a for lifting the newly arrived layer 223 and the exiting movement of the support element 42a from the gap between layer 22^ and the partial stack consisting of layers 22^ and 22.,. During the extension of element 42a, the support element 43a moved synchronously with the element 42a is driven under the support surface 30. This period of time is disposed of by the support element 41a, which according to fig. 6d is driven out to the side from the area of the support surface 30, for lowering over the section h^+h,,, as a preparation for driving under the support surface 30. The position according to fig. 6e essentially corresponds to an intermediate position between the positions in fig. 4f and 4g for the design example according to fig. 2. The position corresponding to fig. 4g is reached in fig. 6f, where the support element 44a has reached the height h^ and thereby supports the partial pile of layers 22^, 222 and 22^/while the new layer 22^, corresponding to the position according to fig. 4h and 4s for the embodiment according to fig. 2 is in the process of driving onto the support surface 30. The support element 42a has been driven all the way out to the side from the area of the support surface 30 and the gap above layer 22^ and'/has dropped the layers 221 and 222 onto 22^- Synchronous with the exit of element 42a, element 43a is driven under the support surface 30 and is ready for lifting the new layer 22^, as soon as this has been punched against the rear stop 47. The support element 41a has reached its lower end position in the plane below the support surface and is ready for entry under the support surface 30.

Fig. 6g again shows an intermediate position, where the new layer 22^ is lifted by support element 43a, while element 44a folds upwards and is thereby driven out to the side from the gap above the new layer 22^. During this extension to the side of element 44a, the horizontally synchronously moved element 41a runs under the support surface 30. According to fig. 6h is the end position of the movement state according to fig. 6g reached. The support element 44a has been driven completely out of the support surface's 30th area and stands at the height h^+h^, while the support element 43a has lifted the new layer 22^ over the stretch h^, so that the support surface 30 is again free for driving in a new layer 22,., as in fig. 6h is shown as already being driven onto the support surface 30. Element 41a is driven all the way under the support surface 30 and is ready for lifting the incoming new layer 22j-, as soon as this is stopped against the rear stop 47. Correspondingly is the horizontally synchronously moved element

44a is driven all the way to the side from the pile area and stands at height h-j+h,,.

The lifting movement of the new layer 22 now takes place according to fig. 6i when lifting element 41a, while element 43a which supports the formed partial stack folds upwards and is pulled out to the side from the stack. During this extension of element 43a, element 42a runs under the support surface 30 and element 44a is lowered the distance h^+h2 below the plane of the support surface 30.

In the position shown in fig. 6j, layer 22^ is lifted the distance h^, so that the support surface 30 is free for driving in the next layer 22b, which is already in the process of being driven into the surface 30. The support element 43a has been driven completely out of the stack and element 42a is correspondingly driven all the way under the support surface 30.

It is assumed that in the present case a stack of six layers 22 is to be formed. Then fig. 6j to the position shown in fig. 4h and 4s or 4i and 4t for the embodiment according to fig. 2, with the difference that the substack which is lifted by the lifted element 41a does not comprise three, but five layers 22. When, according to fig. 6k does not follow a lifting movement of element 42a, which in and of itself is ready to lift layer 22^, but element 41a is simply driven out to the side from the previously formed partial stack of five layers 22 and drops this onto the new layer 22^, at the same time as element 44a is forcibly driven under the pile surface 30, the finished pile here consisting of six layers (corresponds to the representation in fig. 4j and 4u for the embodiment according to fig. 2), lies on the support surface 30 and can after submerging the rear stop 47 is driven out on the exit belt 20 to make room for the not shown next layer (22^), which in the same way as layer 22^ according to fig. 6a forms the first layer for a new stack of six layers 22 and stops against the newly raised stop 47 after the finished stack has been driven out. Parallel to the extension movement of support element 41a, lowering of the former according to fig. 6i extend element 43a in a plane below the support surface 30, so that the two support elements 42a and 44a after extending the stack of six layers 22, which according to fig. 6k still lies on the surface 30, is ready for lifting below the surface 30, while the two support elements 41a and

43a, after the lowering of element 41a carried out approximately parallel to the next lifting movement, stands next to the support surface 30, but below its plane. This is again a position of the support elements that corresponds to fig. 6a.

Based on this, the sequence according to fig. 6a-6k are carried out to form the next stack. When the first layer (22^) of the next stack is lifted by element 42a, a horizontal movement of the horizontally synchronously moved elements 41a and 44a to the right in fig. 6k, so that the starting position according to fig. 6a again is reached. Alternatively, instead of the starting position as shown in fig. 6a, an initial position corresponding to fig. 6k, as in both cases there are two support elements (41a and 42a in Fig. 6a and 42a and 44a according to Fig. 6k) ready for lifting under the pile support surface 30 and can thus immediately lift the first two layers (22_ and 22D) for subsequent stack. Since only this is decisive for the starting position, the positions according to fig. 6a and 6k equivalent.

As illustrated by the above, with all described embodiments of the stacking device 11, a cycle time of less than 2 sec. can be achieved, as is necessary according to what was discussed in connection with fig. 1, for continuous stacking of the mineral fiber plates 21 or their surface formation, which are delivered in the production line shown there.

In the working method according to fig. 4 or 6, even shorter stroke times are possible, as each new incoming layer 22 can be advantageously lifted immediately after hitting the stop 47 with a time requirement of only 0.2 sec., whereupon the support surface 30 is immediately free for driving in a subsequent layer 22, which can thus drive in with a time interval of only 0.2 sec., while the unavoidable time required for a complete driving in of the new layer 22 to the stop 47 is utilized to prepare the support elements of the stacking device 11 for lifting of the next team 22.

at least the individual fork-shaped support elements 41-44 respectively. 41a-44a, which lie at a greater distance in front of the stop 47, can be removably attached to the corresponding slides 33-36 respectively. 33a-36a, so that the front support elements which are not needed in continuous production to support the relevant layer 22 over its length, can be removed. Apart from the weight saving for the moving parts, such front support elements can then also not collide with the leading edge of a subsequent new layer 22, so that this can be driven in behind the rear edge of the layer 22 at the front of the device 11 with the time interval actually needed for the lifting movement. Conversely, the usable stack length can be increased for longer mineral fiber plates 21 with a larger surface by the back edge projecting a bit towards the direction of production according to arrow 1 above the front edge of the front support elements, so

it is ensured that the push-back on the front support elements in the direction of production takes place in front of the center of gravity

for the rearmost mineral fiber plate 21 of the formation. For standard programs for mineral fiber plates 21 with a large surface, the length of the support elements 41-44 and 41a-44a can also be shortened to a minimum, which ensures the rejection of the mineral fiber plates 21's center of gravity, so that the entry and exit sections and thus the time required is reduced by the shortening of the support elements.

As a result of the minimal drop height of the individual layers 22 when these are combined with a driven-in new layer 22, the stacking device 11 according to the invention achieves a gentle and undisturbed laying down of the part of the stack formed at any time on the new layer 22. By corresponding design of the support elements 41-44 respectively 41a-44a, e.g. according to fig. 2-6, a decent cushioning of the individual layers is also ensured, so that mineral fiber plates 21 of soft and thin material are also protected against damage. In cooperation with the stowing belt 8, the stacking device according to the invention also ensures a maximum stacking capacity for individual mineral fiber plates 21 and sheet formations, which are first formed on the stowing belt 8. This ensures a high production effect for the production line, where, in the manner described, a stepless adaptation to different lengths of the plates 21. The loading and unloading in the same plane of the stacking device 11's stacking space 23 ensures that no changeover time or the like is needed. during formation of a pile or after formation of a finished pile. Such conversion time would lead to problems with a continuous production line and e.g. require preliminary intermediate storage of the first layers for a new stack. On the other hand, the run-out of the finished stack takes place essentially synchronously according to the invention, so that each layer 22, regardless of the achieved stack position, can drive onto the support surface at the same time and either be stacked in a previously formed partial stack or form the first layer of a new stack. As no sliding movements occur between the layers 22 during stacking, the stacking device 11 is also particularly suitable for boards with poor sliding and stability properties. Furthermore, boards with a low density and porous or fiber structure, such as mineral fiber boards 21, can also be stacked without problems, as they are supported softly from below and there is no need for suction cups etc. for stacking. The low drop heights also enable quick stacking of light layers, as the predominant part of the necessary movement for bringing the layers together is achieved with a lifting movement and not with a falling movement.

A special advantage is finally achieved by the fact that the stowing belt 8, the support surface 30 for the stacks and the run-out belt 20 not only run flush with each other, but also lie in one plane, so that in the event of a failure of the stacking device 11, the mineral fiber plates 21, possibly after forming on the stowage belt 8 can pass through without obstruction and a stacking device 11 which stands still in the event of disturbances does not necessarily lead to a stoppage of production. During such a disturbance, the stacking can be done manually if necessary or the unstacked plates can be temporarily stored in some other way. This is particularly important, e.g. in the production of mineral fiber boards 21, which requires continuous operation of the melting trough, so that production stoppages lead to large losses.

As shown in the above description, the invention is not limited to the embodiments shown, but multiple modifications can be carried out without leaving the scope of the invention. Thus, e.g. the support elements 41-44 as well as 41a-44a have a different design to achieve the best possible flat support for the layers 22. A movement control of the support elements that deviate in the details can also be carried out, as long as the desired goal is achieved. In this connection, one can e.g. forgo synchronous control of the horizontal movement of the support members 41a and 44a" on the one hand and 42a and 43a on the other side and all four sets of support members 41a-44a according to Fig. 6 can be moved independently of each other, although the support members 41a and 44a and 42a and 43a are arranged mutually offset.

Claims (18)

1. Procedure for stacking stackable objects, in particular mineral fiber boards in a production line, in layers of one or more objects arranged above each other, where the objects assigned to a layer are brought into a stacking room and there brought together with the previously added layers that have already forms a sub-pile, from the underside of this sub-pile, where the previously formed sub-pile is held at a distance above the entry level for the layers, and at any time new layers are lifted after entry into the stack space. a stretch that at least corresponds to the thickness of the layer to be stacked and added to the underside of the partial stack, characterized by the previously formed partial stack being lifted independently of the new layer. 2. Method as specified in claim 1, characterized in that the previously formed partial pile is lifted at the same time as the new layer, preferably a smaller section than the new layer. 3. Procedure as stated in claim 1 or 2, characterized in that the last new layer of the stack remains in the run-in plane and that the partial stack is placed from above onto the last layer. 4. Procedure as stated in one of claims 1-3, characterized by the finished stack being driven out on the side of the stack room which is directly opposite the entry side for the individual layers. 5 i Device for stacking stackable objects, in particular mineral fiber boards in a production line, in layers of one or more objects placed above each other, a) with lifting devices for the layers of objects to achieve the vertical displacement of the layers when forming the stack, b) with a stationary lower pile support surface, c) with an estimate placed in the direction of entry of the layers behind the stacking room for punching in the register of the new layers driven in at any time and d) with a transport device for transporting away the finished stack, where each lifting device comprises at least one support element oriented at least approximately parallel to the support surface for the layers, which can be driven from the side under the stack and after lifting can be driven out of the stack space and which is relatively movable in the vertical direction to the support element for one of the other lifting devices, character-certvedat e) that the support elements (41, 42 or 43, 44; 41a or 42a or 43a or 44a) for one of the lifting devices (24, 25; 26a, 27a, 28a, 29a) are relatively movably secured against at least one of the other lifting devices in the horizontal direction and f) that the support elements (41, 42 or 43, 44; 41a or 42a or 43a or 44a) for each lifting device (24, 25; 26a-29a) penetrates through the support elements for another lifting device located on the same side of the stack space (23) during the vertical relative movement. 6. Device as stated in claim 6, characterized in that two lifting devices (24, 25) are arranged and that each lifting device (24, 25) comprises sets of support elements (41, 42 or 43, 44) which are arranged on both sides of the stack space (23) and is synchronously driven, and which extends over less than half the width of the support surface (30). 7. Device as stated in claim 5, characterized in that there are four lifting devices (26a-29a), which comprise sets of support elements (41a, 44a or 42a, 43a) arranged in pairs on both sides of the stacking space (23), each of which extends over at least approximately the entire width of the support surface (30). 8. Device as specified in claim 7, characterized in that the support elements. (41a, 44a or 42a, 43å) for two mutually opposite lifting devices (26a, 29a or 27a, 28a) on both sides of the stacking space (23) have a constant mutual horizontal distance to avoid mutual penetration. 9. Device as stated in one of claims 5-8, characterized in that the support elements 41-44; 41a-44a) are designed as fork arms, where the fork arms for each lifting device (24, 25; 26a-29a) opposite the fork arms for another lifting device, located on the same side of the stacking space (23), are laterally offset by a value that enables vertical overtaking of the fork arms to each other. 10. Device as stated in one of claims 5-9, characterized in that the support elements 41-44; 41a-44a) via spacers (37-40; 37a-40a) with a vertical distance are stored on the underside of upper bearing parts (lifting table 28,29; lifting devices 28a, 29a) respectively. on the upper side of lower bearing parts, (lifting table 26, 27; lifting devices 26a, 27a for the lifting devices 24, 25; 26a-29a. 11. Device as specified in one of claims 5-10, characterized in that the support elements (41-44; 41a-44a) are tapered in the direction of their free ends. 12. Device as set forth in one of claims 5-11, characterized in that the pile support surface (30) runs flush with the plane of an entry lane (back-up band 8) for the individual layers (22) and with the plane of a run-off lane (run-off lane 20) for the finished stack. 13. Device as set forth in claim 12, characterized in that the run-in track (storage belt 8) and the run-out track (the run-out belt (20) with the intermediately connected support surface (30) join each other in a straight line. 14. Procedure for stacking stackable goods, in particular mineral fiber boards in a production line, using a device as specified in one of claims 5-13, characterized in that a) the support elements for the first lifting device. lifts the first layer that is driven onto the support surface for the pile to a level that enables the second layer to be driven in (fig. 4b,m,6b), b) that the support elements for the second lifting device then lift the second layer after this has been driven all the way onto the support surface at a level that enables the entry of the third layer, and that the support elements for the first lifting device are moved to exit to the side from the gap between the first and second layers and optionally, the first layer lifts further to enable the lifting movement of the second layer (Fig. 4c/d, n/o; 6c) and c) that the support elements for the second lifting device keep the second layer at least at a level that enables the third layer to be driven in (fig. 4d/f, o/p/q; 6d). 15. Method as stated in claim 14, using a device as stated in one of claims 6 and 9-13, characterized in that d) the support elements for the first lifting device during the drive-in of the third layer onto the stationary support surface, after exiting to the side from the gap between the first and second layers, are lowered and again driven under the support surface (fig. 4d/e, o/p), e) that the support elements for the first lifting device lift the third layer after it has been driven all the way onto the support surface to a level that enables the drive-in of the fourth layer, and that the support elements for the second lifting device are moved for lateral exit from the gap between the second and third layers and possibly lift second layer further to enable the lifting movement of the third layer (fig. 4f/g, q/r) and that the support elements for the first lifting device keep the third layer at a level which at least enables the driving in of the fourth layer (fig. 4g/h/ i, r/s/t). 16. Method as stated in claim 14, using a device as stated in one of claims 7-13, characterized in that d) the support elements for the first lifting device during the drive-in of the third layer on the stationary support surface are moved to the side from the gap between the first and second layers or are driven out to the side (fig. 6d) e) that the support elements for the third lifting device, after the third layer has been fully driven onto the support surface, lift this third layer to a level that enables the fourth layer to be driven in, and that the support elements for the second lifting device are moved to the side from the gap between the second and third layers and possibly lift second layer further to enable the lifting movement of the third layer (Fig. 6e), f) that the support elements for the third lifting device keep the third layer at a level that at least enables the fourth layer to be driven in (fig. 6f), g) that the support elements for the second lifting device during the drive-in of the fourth layer on the support surface are moved to the side from the gap between the second and third layer or are driven out to the side (fig. 6f) h) that the support elements for the fourth lifting device then, after the fourth layer has completely driven in on the support surface, lift the fourth layer to a level that enables the drive in of the fifth layer and that the support elements for the third lifting device are moved to exit to the side from the gap between the third and fourth layers and possibly lift the third layer further to enable the lifting movement of the fourth layer (Fig. 6g), i) that the support elements for the fourth lifting device keep the fourth layer at least at a level that enables the fifth layer to be driven in (fig. 6h), j) that the support elements for the third lifting device during the insertion of the fifth layer on the pile support surface are moved to the side from the gap between the third and fourth layer or are moved out to the side (fig. 6h), k) that the support elements for the first lifting device, after exiting to the side from the gap between the first and second layer and after immersion under at least one of the work bays e-j, again run under the support surface (fig. 6h), 1) that the support elements for the first lifting device then lift the fifth layer after it has been driven all the way onto the support surface, at a level that allows the entry of the sixth layer and that the support elements for the fourth lifting device are moved for exit to the side from the gap between the fourth and fifth layer and optionally lifts the fourth layer further to enable the lifting movement of the fifth layer (fig. 6i) and m) that the support elements for the first lifting device keep the fifth layer at least at a level which enables the driving in of the sixth layer (fig. 6j). 17. Method as stated in claim 14 or 16, characterized in that the support elements for two mutually opposite lifting devices on both sides of the stacking space, i.e. partly for the first and third lifting device and partly for the second and fourth lifting device are moved synchronously with each other to avoid mutual penetration in the horizontal direction. 18. Device as stated in one of the claims 14-17, characterized in that the layer which is arranged to form the bottom layer in the finished stack after complete run-in on the support surface remains on the support surface and the partial stack formed above is placed down on the last layer by that the support elements for the lifting device that was used for lifting the second-to-last layer possibly after or during a simultaneous lowering movement run out to the side from the gap between the last and second-to-last layer.