Conveyor device for conveying baked waffle sheets on a table having a discharge flap

Abstract

Conveyor device (100) for conveying baked wafer sheets on a table having a discharge flap, with - a substantially vertically extending wave (10), - a plurality of essentially horizontally extending arms (20) driven by the shaft (10) about it in a direction of rotation, each of which is articulated at one end to the shaft (10) and each of which has a receiver foot (30) extending radially from the arm (20) at its end opposite the shaft (10), and - a curved track (40) forming a first support surface on which the arms (20) rest and which defines a first lifting position for raising the arms (20) from the table and a first placement position for placing the arms (20) on the table, wherein the support surface of the curved track extends between the first placement position and the first lifting position on a first level and between the first lifting position and the first placement position on a second level higher than the first level, characterized by a cam (50) arranged to rotate around the shaft (10), which forms a second support surface designed to receive the arms (20) and at least - to assume a first rotational position in which the support surface of the cam (50) is arranged at the level of the support surface of the curved track (40) or below the support surface of the curved track (40), and - to assume a second rotational position in which the cam (50) defines a second lift-off position raising the arms (20) from the cam track (40) in the area of ​​the first level and a second placement position lowering the arms (20) onto the cam track (40) in the area of ​​the second level, wherein the bearing surface of the cam (50) extends in the direction of rotation between the second lift-off position and the second placement position, is set up.

Description

[0001] The invention relates to a conveyor device for conveying baked wafer sheets on a table having a discharge flap, comprising a substantially vertically extending shaft, a plurality of substantially horizontally extending arms driven by the shaft around the shaft in a direction of rotation, each of which is pivotally connected to the shaft at one end and each having a pickup foot extending radially from the arm at its end opposite the shaft, and a curved track forming a first support surface on which the arms rest and which defines a first lifting position configured for raising the arms from the table and a first placement position configured for placing the arms on the table,wherein the support surface of the curved path extends between the first touchdown position and the first lift-off position at a first level and between the first lift-off position and the first touchdown position at a second level higher than the first level.

[0002] Such a conveying device is known as a device for removing baked goods baked in a baking machine from DE 10 2012 024 431 A1.

[0003] The known conveyor device is designed in such a way that the arms, each equipped with a pickup foot, rest on the baked goods to be transported and transport them away from the baking machine due to gravity. To prevent a buildup of baked goods caused by malfunctions in the processing stages following the conveyor device, a flap is also provided in the table. This flap opens when such a malfunction occurs, allowing the baked goods emerging from the baking machine to be discharged downwards.

[0004] The support surface of the cam track must be designed in such a way that the positioning of the arms prevents the arms, or more precisely the pickup feet, from sinking below the surface of the table, so that the arms or pickup feet cannot collide with the table when the flap is open.

[0005] Although this design has proven to be advantageous in principle, practical application has shown that the adjustment effort of the individual system components with regard to the position of the flap in relation to the lifting and lowering position is considerable and that signs of wear of the individual system components require frequent readjustment.

[0006] The object of the invention is therefore to provide a conveying device for conveying baked wafer sheets on a table having a discharge flap, with which a sinking of the arms or the discharge feet below the table surface can be effectively prevented and at the same time the overall adjustment effort can be reduced.

[0007] This object is achieved according to the invention by the conveying device having the features of claim 1. The subclaims represent advantageous embodiments of the invention.

[0008] The basic idea of ​​the invention is to provide, in addition to the known curved track, a link with which the lifting of the arms from the table surface can be brought forward in terms of the direction of rotation of the arms in the form of a second lifting position, before the first lifting position, so that the arms cannot sink below the surface of the table even if the elements become worn. Rather, the arms are raised in the direction of rotation before reaching the discharge flap or at the latest before leaving the area of ​​the discharge flap. In a second landing position, they are raised to the higher second level of the curved track and guided to the curved track.

[0009] In a third position of the link, all arms attached to the circumference of the shaft can be raised in such a way that maintenance work on the conveyor device or the table containing the discharge flap is possible.

[0010] According to the invention, a conveying device for conveying baked wafer sheets on a table having a discharge flap is proposed, comprising a substantially vertically extending shaft, a plurality of substantially horizontally extending arms driven by the shaft around the shaft in a direction of rotation, each of which is pivotally connected to the shaft at one end and each having a pickup foot extending radially from the arm at its end opposite the shaft, and a curved track forming a first support surface on which the arms rest and which defines a first lifting position configured for raising the arms from the table and a first placement position configured for placing the arms on the table,wherein the support surface of the curved track extends between the first placement position and the first lifting position at a first level and between the first lifting position and the first placement position at a second level higher than the first level, wherein a link is provided which is arranged to rotate about the shaft and forms a second support surface designed to receive the arms and is arranged at least for assuming a first rotational position in which the support surface of the link is arranged at the level of the support surface of the curved track or below the support surface of the curved track, and for assuming a second rotational position in which the link defines a second lifting position which lifts the arms from the curved track in the region of the first level and a second placement position which sets the arms down on the curved track in the region of the second level,wherein the support surface of the link extends in the direction of rotation between the second lifting position and the second placement position.,

[0011] The link is preferably configured to assume a further third rotational position, in which the support surface of the link is arranged at least at the level of the second level of the curved track, but particularly preferably above the support surface of the curved track. The third rotational position, in which the support surface of the link is arranged in particular completely above the support surface of the curved track, enables all arms to be fully raised and thus allows free access to areas of the device that would otherwise be inaccessible due to the essentially horizontal position of the arms.

[0012] In this third rotational position, the arms are preferably raised to the second level of the cam track. This ensures that the arms extend upwards far enough to keep as much space as possible free below the arms for maintenance and repair work.

[0013] Most preferably, in the aforementioned preferred and particularly preferred embodiments, the conveying direction has a stop arranged above the articulated connection between the shaft and the arms, wherein the arms in the third position abut the stop and rest on the guide slot. In this position, the arms are thus clamped between the stop and the guide slot and secured against unintentional movement in the joints connecting the arms to the shaft. Otherwise, the stop is provided to limit the upward movement of the arms, since it has been shown during operation that a sudden upward movement of the arms can result in a dead position from which the arms no longer move downward under the force of gravity.

[0014] The rotation of the gate is achieved by a drive, preferably designed as a linear drive, with the linear drive being connected to the gate in an articulated manner. The linear drive is preferably formed from two cooperating cylinders, with the first, second, and third rotational positions of the gate corresponding to the state of the cylinders: if both cylinders are extended, the gate is in the first rotational position; if one of the cylinders is retracted, the gate is in the second rotational position; and finally, if both cylinders are retracted, the gate is in the third rotational position.

[0015] The link is preferably annular. Specifically, the link is designed as a closed ring in the form of a hollow cylinder, which particularly preferably forms a support surface, a support ring, arranged in one plane on its end face. In this case, it is most preferably provided that the flat support surface of the link is tilted relative to an imaginary plane perpendicular to the longitudinal axis of the shaft when the second rotational position is assumed. For this purpose, the link has at least three elongated holes, some of which are not perpendicular to the wall of the link, but rather at an angle to the wall of the link. By rotating the link, when fixed bolts engage in the three elongated holes, the link is tilted, which results in the support surface of the link forming a second lifting position and a second contact position, which connects the first level of the curved track with the second level of the curved track.If the link is rotated further, it is tilted back due to the design of the elongated holes so that the link assumes the third rotational position in which the support surface of the link is aligned in a plane perpendicular to the longitudinal axis of the shaft.

[0016] The curved track is preferably formed from two cooperating concentric rings so that the first lifting position and the first landing position can be adjusted and fixed by rotating the rings relative to each other in accordance with the environment.

[0017] Finally, a baking system for producing baked goods is also claimed, comprising a table having a discharge flap and a conveyor device configured according to the invention for conveying the baked goods on the table. The baking system preferably comprises a controller that controls the rotational position of the gate as a function of the position of the discharge flap. Specifically, the controller is configured such that, starting with the discharge flap closed and the gate in the first rotational position, the controller causes the gate to assume the second rotational position when the controller senses an open discharge flap and / or causes the discharge flap to open.

[0018] The invention will be explained in more detail below with reference to a particularly preferred embodiment shown in the accompanying drawings. They show: Fig. 1 a perspective view of a particularly preferred embodiment in a first working phase (with the discharge flap closed); Fig. 2 a perspective view of a particularly preferred embodiment in a second working phase (with the discharge flap open); Fig. 3 a perspective view of a particularly preferred embodiment in a third phase set up for maintenance of the embodiment; Fig. 4 a perspective view of the lift-off curve segment of the two-part curved track; Fig. 5 a perspective view of the second curve segment of the two-part curved track; and Fig. 6 a perspective view of the ring-shaped backdrop.

[0019] Fig. Figure 1 shows a perspective view from above of a particularly preferred embodiment. The view depicts, in particular, a particularly preferred conveyor device 100 in a first operating phase, in which the discharge flap of a baking system table (not shown) on which baked goods are conveyed is not shown.

[0020] The conveying device 100 is designed in particular for conveying baked waffle sheets on a table having a discharge flap and has a substantially vertically extending shaft 10 and a plurality of substantially horizontally extending arms 20 driven by the shaft 10 in a direction of rotation therearound. The arms 20 are each pivotally connected to the shaft 10 at one end and each have, at the end opposite the shaft 10, a pickup foot 30 extending radially from the respective arm 20, which rests on the baked goods, i.e. the baked waffle sheets, and conveys them on the table (not shown) over the discharge flap by the rotational movement of the shaft 10.

[0021] For placing the pickup feet 30 onto the baked goods and removing the pickup feet from the baked goods, a curved track 40 is provided, forming a first support surface on which the arms 20 rest and which defines a first lifting position configured for raising the arms 20 from the table and a first placement position configured for placing the arms 20 onto the table. The support surface of the curved track extends between the first placement position and the first lifting position at a first level, and between the first lifting position and the first placement position at a second level higher than the first level.

[0022] According to the invention, the conveyor device 100 further comprises a link 50 which is arranged rotatably about the shaft 10 and forms a second support surface designed to receive the arms 20. This link is designed to take up at least one Fig. 1, in which the support surface of the link 50 is arranged at the level of the support surface of the curved track 40 or below the support surface of the curved track 40 and is therefore inoperative.

[0023] If, however, the link 50 is brought into the second rotational position by the linear drive 60 formed by two cylinders 60a, 60b, the result is Fig. 2, which shows a perspective view of the particularly preferred embodiment in the second working phase with the discharge flap open.

[0024] In the second rotational position, the link 50 has a second lifting position that raises the arms 20 from the curved track 40 in the region of the first level, and a second contact position that lowers the arms 20 onto the curved track 40 in the region of the second level. The contact surface of the link 50 that comes into contact with the arms extends in the direction of rotation between the second lifting position and the second contact position.

[0025] Fig. Figure 3 shows a perspective view of a particularly preferred embodiment in a third phase configured for maintenance of the embodiment. In this rotational position, all arms 20 hinged to the shaft 10 are raised, so that the area extending beneath the arms 20 is freely accessible for maintenance work.

[0026] Further shows Fig. 4 a perspective view of the lifting curve segment 40a of the cam track 40 which is designed in two parts in the exemplary embodiment and which is connected to the Fig. 5, to form a uniform curved path 40 with a first lifting position and a first landing position. The two segments 40a, 40b are designed as rings of different diameters and are arranged concentrically.

[0027] Finally, Fig.6 shows a perspective view of the link 50, which in the exemplary embodiment is also ring-shaped. The elongated holes in the hollow-cylindrical link 50 clearly show the three rotational positions, wherein it is also apparent that the elongated holes are not guided at a right angle through the wall of the link 50 over their longitudinal extent. Rather, sections of the elongated holes are guided at an angle to the wall of the link 50, so that the link 50, when rotated about the shaft 10, performs a first tilting movement from the first rotational position to the second rotational position and a second tilting movement from the second rotational position to the third rotational position, with which the surface of the link 50 is again aligned horizontally.

Claims

[1] Conveying device (100) for conveying baked wafer sheets on a table having a discharge flap, with - a substantially vertically extending shaft (10), - a plurality of substantially horizontally extending arms (20) driven by the shaft (10) around the latter in a direction of rotation, each of which is pivotally connected to the shaft (10) at one end and each having, at its end opposite the shaft (10), a pickup foot (30) extending radially from the arm (20), and - a curved path (40) forming a first support surface on which the arms (20) rest and which defines a first lifting position arranged for raising the arms (20) from the table and a first placing position arranged for placing the arms (20) on the table, wherein the support surface of the curved path extends between the first placing position and the first lifting position at a first level and between the first lifting position and the first placing position at a second level which is higher than the first level, characterized by a link (50) rotatably arranged around the shaft (10), which forms a second support surface designed to receive the arms (20) and at least - to assume a first rotational position in which the support surface of the link (50) is arranged at the level of the support surface of the curved track (40) or below the support surface of the curved track (40), and - for assuming a second rotational position in which the link (50) defines a second lifting position raising the arms (20) from the curved path (40) in the region of the first level and a second placement position setting the arms (20) down on the curved path (40) in the region of the second level, wherein the support surface of the link (50) extends in the direction of rotation between the second lifting position and the second placement position, is set up. [2] Conveying device (100) according to claim 1, characterized by that the link (50) is arranged to assume a third rotational position in which the support surface of the link (50) is arranged above the support surface of the curved track (40). [3] Conveying device (100) according to claim 2, characterized by a stop arranged above the articulated connection between the shaft (10) and the arms (20), wherein the arms (20) in the third position rest against the stop and on the link (50). [4] Conveying device (100) according to one of the preceding claims, characterized by a linear drive (60) which causes a rotation of the link (50) and which is articulated to the link (50). [5] Conveying device (100) according to claim 4, characterized by that the linear drive (60) is formed from two cooperating cylinders (60a, 60b). [6] Conveying device (100) according to one of the preceding claims, characterized by that the link (50) is ring-shaped. [7] Conveying device (100) according to one of the preceding claims, characterized by that the link (50) forms a flat support ring. [8] Conveying device (100) according to one of the preceding claims, characterized by that the support surface of the link (50) is tilted relative to an imaginary plane perpendicular to the longitudinal axis of the shaft (10) when the second rotational position is assumed. [9] Conveying device (100) according to one of the preceding claims, characterized by that the support surface of the link (50) is arranged in a plane perpendicular to the longitudinal axis of the shaft (10) when the third rotational position is assumed. [10] Conveying device (100) according to one of the preceding claims, characterized by that the curved path (40) is formed from two cooperating concentric rings (40a, 40b). [11] Baking plant for producing baked goods with a table having a discharge flap and a conveyor device conveying the baked goods on the table according to one of the preceding claims. [12] Baking plant according to claim 11, characterized by a control which controls the rotational position of the gate (50) as a function of the position of the discharge flap.

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