DE3409395A1 - Apparatus for the automatic laying of spacing laths - Google Patents

Abstract

An apparatus for the automatic laying of spacing laths is proposed, which is of the same generic type as known apparatuses in accordance with DE-OS 3134387 and, like these, has intermediate magazines which are located above a pile which can be lowered, are filled with spacing laths and from which the spacing laths can be individually delivered to lath guiding pockets which are located below and which take the laths to a position directly above the top pile position, where the laths are then discharged from the lath guiding pockets. In the known apparatuses, the lath guiding pockets are taken by a long lath guiding arm mounted on the magazine in question along a circular arc away from the magazine to a position directly above the top board position. By contrast, in the apparatus according to the invention, the path of movement of the laths from the magazine to a position above the top board position is divided into two sections, first into a purely lifting section and only after that into a relatively short section along an arc, so that significantly shorter lath guiding arms can be used. As a result of this, shorter operating times for bringing down the laths can be achieved, and the individual lath laying stations can also be of narrower construction and can therefore be brought closer together. In the drawing, the intermediate magazines are marked with a 6, the lath guiding pockets are marked with an 18 and the lath guiding arms are marked with a 17. A lifting frame 19 on which the lath guiding arms 17 are pivotably mounted is provided for the lifting movement. <IMAGE>

Description

Device for the automatic placement of spacer laths

D e c tio n s The invention relates to a device according to the preamble of claim 1.

Devices of this type are known (DE-OS 31 34 387).

In the known devices, the slat guide arms are each on stored in the intermediate magazines, their length being approximately the distance between the deepest Location of the fixed intermediate magazine and the top stacking level on which the next spacer battens are to be attached. This is the length of the lath guide arms have in the known device so that they have the slat guide pockets from the upper Can bring the end position to just above the topmost stacking layer. The aforementioned Distance is relatively large, so that the topmost stack layer from the Side on a fork-like transfer device under the intermediate magazines be brought unhindered over the previously lowered by a stack unit stack can. In addition, the slat guide arms in the known device may their-der first leave the corresponding starting position, when the aforementioned dispensing device under this by means of a nail curtain Or the like. Fixed boards or the like. The top stack was completely Has been withdrawn and all boards or the like. This kage on the top Spacer bars of the previously lowered stack have been deposited. The pivoting movement the long, massive slat guide arms may only be used with the known device proportional take place slowly so that the respective distance staff does not come out of the staff guide pocket prematurely exits and when reaching the lower end position not too violently on the ejector impacts and is thus discarded when being ejected in a wrong position in relation to the stack will. It is necessary to bring down the spacer slats using the long guide arms therefore, with the known devices, a relatively long time if incorrect filings the spacer bars should be avoided.

The great length of the slat guide arms in the known devices also has the further disadvantage that it reduces the minimum distance between the individual drop-off stations is set to a relatively large extent, since the lath guide arms are essentially in the upper end position of the slat guide pockets extend horizontally and their great length thus for the width of the respective depositing stations is relevant. For this reason, the spacer bars in the known devices are often not placed in places where it is for the stack and its others Handling and, if necessary, processing (e.g. drying, etc.) would be most beneficial.

The invention has for its object to provide devices according to the To improve the preamble of claim 1 that the spacer bars much faster than with the known devices brought down in their final position on the stacking layer can be without the risk of false drops, and that also the discarding stations with a smaller width in the direction of the longitudinal extent of the boards to be stacked executed and accordingly moved closer together than in the known devices can be used to achieve an optimal spacer bar distribution that corresponds to the various needs enable over the stack.

The aforementioned object is achieved by the characterizing part of the claim 1 mentioned features solved.

The features of the invention make it possible to bring down the picket pockets filled from the intermediate magazine in two steps, one of which one a pure lifting movement and only the other, as with the known devices, a pivoting movement at the end of a slat guide arm is to be divided, the first Step, if necessary together with the bringing down of the nail curtain, already carried out as long as the top stack layer is still on the transfer device located, and the second step with a correspondingly opposite the known Devices each much shorter lattenleitarm only a much smaller one remaining space down to just above that completely on the stack needs to bridge the uppermost stack layer. Accordingly is also the time after the final dropping of the top stack layer for the application of the Spacer battens are still required, all other things being equal with regard to the avoidance of missed throws much shorter than with the known devices.

Because of the much smaller length also in the case of the invention Device in position for receiving a spacer bar from the intermediate magazine If the staff guide arms are in a horizontal position, the staff can be very narrow executed and thus also moved much closer together than this at the known devices is the case.

The subclaims relate to advantageous developments of the subject matter of the main claim. The features of the claims are of particular importance 3 and 7 too.

The features of claim 3 lead to a compulsory backup the correct dropping position of the spacer bars on the stack even with a very rapid one Swiveling the guide arms into the storage position, and they are because of the Carrying out the second step of spacer bar installation discussed above remaining small distance to implement structurally simple.

The measure according to claim 7 gives the supports for the slat guide arms a double function, the separate carriers and lifting devices for the nail curtains makes dispensable and a forced synchronization between the lifting movement of the Slat guide arms and the lifting movement of the associated nail curtains provides. Through this is the somewhat higher effort for the slat transfer device compared to the known devices by far compensated.

The invention is illustrated below with reference to the drawing using an exemplary embodiment explained in more detail. In the drawing: Fig. 1 shows the device according to the invention seen in a schematic representation from the side, FIGS. 2a and 2b the intermediate magazine and the staff guide mechanism of a staff deposit station in the staff receiving position (Fig. 2a) and in the position after placing a spacer bar on the topmost stack of boards (Fig. 2b), Fig.3a -3f the slat guide mechanism of the device according to the invention in the version with a Lagesicherunqsanschlag seen from the side in different Positions from the staff holder the intermediate magazine to Spacer bar storage on the stack, and FIG. 4 an intermediate magazine from the side seen with a clamping mechanism according to claim 4.

The device according to the invention consists essentially of one another mirror images of the same structural units at one or the other end of the respective Spacer bars arranged and connected to one another or to achieve a synchronism of motion with each other across the transverse to the plane of the drawing Fig. 1 extending stack width are coupled to one another. The ones below Intermediate magazines discussed in more detail and the slat guide mechanisms grip the spacer slats in each case only in their end area, and in the same way, so that it is inclined, below only the functionalities of the components that are bR + sensitive on the one hand to portray.

Fig. 1 shows the one on the one hand perpendicular to the plane of the drawing extending spacer slats 1 finite structural unit 2 looking towards the side facing away from the spacer bars 1.

According to the drawing, the device has an inherently rigid frame i made up that for each of the two on one or the other side of the stack Boards, planks or the like. 4 a rigid stationary support 5 besi.tzt., On the several intermediate magazines 6 in each case in the direction of the one parallel to the plane of the drawing in FIG. 1 Longitudinal extension of the boards or the like. 4 by means of one only indicated in FIG. 1 Gear2.motors 7 can be moved individually. The number of intermediate magazines 6 corresponds to the number of slat depositing stations provided, whereby they are identical to each other Parts of the with one or the other end of the Spacer bars 1 cooperating Intermediate magazines 6 over the width of the stack rigidly with one another for a lichlau are coupled so that one gear motor 7 is sufficient for each unit.

The intermediate magazines 6 are, as can be seen in Fig. 1 on the right, Can be moved together to a minimum distance determined by their overall width and can otherwise be arranged at any point above the stack to be formed.

As best shown in FIGS. 2a, 2b and 4, each intermediate magazine 6 a vertical, funnel-shaped widened at the top, in the longitudinal direction of the spacer slats 1, at least on the side facing the middle of the open, vertical shaft 8, which is able to accommodate several spacer bars 1 vertically one above the other. The lowermost spacer bar la is in the shaft 8 by means of a closer Details in Fig. 4 shown Klemmvarrichtung clamped that this spacer bar la by means of a clamping pressure acting from the side and exerted by a clamping lever 9 holds down in the intermediate magazine 6 and to release this spacer bar la can be unlocked against the force of a spring 10 by means of a working cylinder 11.

The individual intermediate magazines 6 or -W. their shafts 8 are from above can be filled via a slat cross conveyor 12 with spacer slat receiving pockets 12a, which in a manner not shown in the drawing in the receiving pockets 12a inserted spacer slats 1 in the direction of arrow 13 in the lower run transported the stack. According to Fig. 2a, 2b is on each intermediate magazine 6 in the path of movement of the spacer slats 1 transported by the cross conveyor 12 can be raised Wiper 14 is provided, which in case of need in the one shown in Fig. 2a in solid lines The removal position is raised in order to stop a spacer bar 1 as long as until it has come free from the moving receiving pocket 12a and into the Shaft 8 falls into it. In the position shown in dashed lines in Fig. 2a the scraper 14 is outside the path of movement of the spacer slats, so that in this position is not taken. The scraper 14 is operated so that a sufficient supply of spacer slats 1 in the individual intermediate magazines 6 is located, so that an independent of the operation of the cross conveyor 12, non-stop Operation at the individual slat depositing stations is guaranteed.

There is one under each of the intermediate magazines 6 Slat guide mechanism 15, which consists essentially of a carrier 16, one on this pivotably mounted lath guide arm 17 and one at the free end of the latter attached slat guide pocket 18 as well as one common to all slat laying stations There is lifting frame 19, which is only indicated by means of a in Fig. 1 of the drawing Lifting mechanism 20 relative to the intermediate magazines 6 can be moved up and down.

The slat guide pockets 18 are by means of the lifting frame 19 and the respective Lattenleitarmes 17 from an upper end position in which they are immediately below the shaft 8 of the associated intermediate magazine 6 are in a lower end position movable, in which they are arranged directly above the top stack layer.

To the slat guide pockets 18 from the upper end position to the lower to bring, the lifting frame 19 is first to the distance shown in FIG. 1 a lowered and only then the respective lath arm 17 from its horizontal Slat receiving position pivoted downward into the vertical position in which he then has brought the associated slat guide pocket 18 into its lower end position.

On each of the supports 16 of the slat guide mechanisms 15 there is one at the bottom nail curtain 21 extending over the width of the stack attached, the push-up Has nails (Fig. 2a), which over its length with a small distance from each other are evenly distributed. The lifting frame 19 is lowered so far that the nails that have gaps between the individual boards, planks or the like. The respective uppermost stack layer are arranged, enter this column, wherein the nails located above board areas can move upwards. The in the Nails that have entered into cracks secure the boards in their lateral position when they are withdrawn the transfer device, not shown in the drawing, which the board layer or the like. Introduces from the side under the intermediate magazines as soon as the stack has been lowered on the movable stacking platform 22 by one stacking unit.

The lifting frame 19 is thus away from the intermediate magazines 6 in order to reach it the aforementioned position lowered very low, so that for the lath guide arms 17 only a small distance to the top of the stack to place the respective items Distance bar is to be bridged. Accordingly, the slat guide arms 17 can also be great briefly and accordingly quickly from the horizontal to the vertical Position can be pivoted without the risk that the when entering the lower end position to be ejected slat a bounce and thus a misalignment gets on the stack.

The spacer slats 1 are ejected from the slat guide pockets 18 in each case by means of an ejector stop 23, which is at the bottom of the support 16 of the slat guide device 15 in a position laterally next to the path of movement of the slat guide pocket 18 is rigid attached and the spacer bar stops until it comes out of the A bit further moving picket pocket has come free and up the stack can sink.

FIGS. 3a-3f show an additional position securing stop 24, which cooperates with the slat guide arm 17 and in the lower end position the lath guide pocket 18 forcibly prevents the spacer lath 1 from being discarded.

The safety stop 24 consists of a lever 25 and one on its free end attached, curved stop element 26, which is on a Roller 27 is supported on the lath guide arm 17 and with its convex inside through a tension spring arranged between it and the lath guide arm 17 is held in contact will. The lever arm 24 has its pivot point essentially below the pivot point des Lattenleitarmes- 17. The curvature of the curved stop element 26 and the mutual arrangement of the pivot points of the levers 17 and 24 and the roller 27 are matched in relation to each other so that the free end of the curved stop element when pivoting the lath guide arm 17 from the horizontal to the vertical Position gradually moved in front of the free side of the slat guide pocket 18 and in the lower end position of the slat guide pocket 18 (Fig. 3f) in front of this at a distance Forms stop that is between the ejector stop 23 and only so much space leaves free that the stopped spacer bar 1 without the possibility of evading sideways, falls straight down.

The lowest spacer bar in each case in the shaft 8 of the intermediate magazine la is only released when a slat pocket 18 is immediately located underneath. In this position of the picket pocket (Fig.3a) it is curved Stop element 26 of the safety stop 24 from the path on which the spacer bar is located moved out of the shaft 8 into the slat guide tab 18, withdrawn.

The spring 28 ensures permanent contact between the bent Stop element 26 and the roller 27 and thus the desired entrainment of the safety stop 24 through the lath guide arm 17 between its end positions via the in Figs. 3b-3e shown intermediate positions away. In the lowest position according to 3f the safety stop 24 is stopped and the spring 28 enables in In this case, the further step back of the lath guide arm 17 with the pocket 18 behind the ejector stop 23.

The slat guide mechanisms are in the upper end position of the lifting frame 19 15 each coupled to the associated intermediate magazine 6 in the sideways direction, so that the slat guide mechanisms and the nail curtains connected to them Shifting of the intermediate magazines into a desired slat storage position in synchronism follow.

Claims (8)

Claims S Device for the automatic laying of spacer slats at variable intervals on the top layer of a stack of boards, Planks or the like. After each layer has been laid and the spacer slats have been placed can be lowered by the total height from the position and the slats placed on it, with 1 a slat conveyor that keeps the spacer slats parallel to the top layer and Substantially perpendicular to the longitudinal extension of the boards or the like. Over the stack transported, and 2 one arranged between the slat conveyor and the stack Slat transfer device for each of several, in the longitudinal direction of the boards or the like at a mutual distance one behind the other arranged slat depositing stations is equipped with a 2.1 one loaded by the slat conveyor, several spacer slats one above the other, height-fixed intermediate magazine, 2.2 one under the intermediate magazine arranged slat guide mechanism, which fork-like the slats from the side has comprehensive slat guide pockets, each at the free end of a pivotable Lattenleitarmes are angeorndet, of which they are between an upper and a lower Fnd- position are movable, being in the upper end position for taking up a spacer bar individually from the intermediate magazine with the open side immediately below this and in the lower end position immediately above the top one Are in the stacking position, and 2.3 one when the slat guide pockets enter the lower one End position automatically coming into action lath ejector to eject the Spacer bar from the bar guide pocket on the top stack layer, d u r c h characterized in that each lath guide arm (17) of the lath transfer device (15) mounted on a carrier (16) which is vertically movable with respect to the intermediate magazine (6) is. 2. Apparatus according to claim 1, d a d u r c h characterized in that the slat guide arms (17) on a lifting frame common to all slat laying stations (19) are stored. 3. Apparatus according to claim 1 or 2, characterized in that each slat guide pocket (18) is assigned a position securing stop (25) which in the lower end position of the picket pocket in a little more than the Spacer lath width corresponds to the distance in front of the open side of the lath guide pocket (18) and in the top. End position of the same from the trajectory of the Spacer slats in the l, attenlc.itt pocket (18), is retracted. 4. Device according to one of the preceding claims, d a d u r c h indicated that each intermediate magazine (6) is an arbitrarily operable Clamping mechanism (9) is assigned, which is the bottom of the in each case Spacer slats (1) by means of clamping pressure acting from the side in the intermediate magazine (6) and can be unlocked to release this slat when the associated Lath pocket is in the upper end position. 5. Device according to one of the preceding claims, d a d u r c h characterized that the ejector (23 from a on the respective carrier (16) of the Lattenleitarmes (17) is firmly attached stop below. 6. Device according to one of the preceding claims, d a d ur c h characterized in that the intermediate magazine (6) and the guide mechanisms (15) are parallel for the longitudinal direction of the boards or the like. 4. Slidable and for a common Shift at the individual slat depositing stations can be coupled with one another. 7. Device according to one of the preceding claims, d a d u r c h marked that each lath depositing station a down on the lath guide arm supports (16) attached, substantially perpendicular to the length of the stacked Boards or the like. (4) associated with a nail curtain (21) extending over the width of the stack is. 8. Device according to one of the preceding claims, d a d u r c h marked that the intermediate maganzine (6), the lath guidance technology (15) and the ejectors (23) each consist of two directly identical to each other or indirectly with each other coupled units exist that interact with the spacer bars <(1) at one or the other end.