DE2651275A1 - CONVEYOR DEVICE FOR CONVEYING PACK CUTS - Google Patents

Description

November 9, 1976

Molins Limited .. η η

Lawyer file: D - 2

-I-

Conveyor device for conveying pack blanks

The invention relates to a conveyor device for conveying objects, in particular pack blanks, with which Cigarettes are packaged.

In the applicant's earlier patent application P 24 07 31.8, there is a cigarette packing machine with a conveyor discloses feeding the pack blanks individually to a further device, in each of which a group of cigarettes is packed in each pack blank. The pack blanks are each made by a reciprocating mechanism Moved one step forward while performing certain folding operations the pack cut. Occasionally it happens that a group of cigarettes is not shared with that corresponding pack cut to the above-mentioned additional Device arrives. This can occur, for example, when the engine is started or when a faulty one Group of cigarettes being ejected. As a result, the corresponding pack blank becomes an empty pack shaped, which results in a waste of blanks and makes it necessary to then eject the empty pack; What is more serious, however, is that the empty package can lead to jamming in the machine, thereby reducing the machine's health possible harm.

709 8 22/0 2 9A

The invention is based on the object of designing a conveying device of the type mentioned so that such Disturbances can be avoided without stopping the reciprocating mechanism.

This object is achieved by the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

A preferred exemplary embodiment is based on the drawings the invention explained in more detail. It shows:

Figure-line partially sectioned side view of an invented proper conveyor;

FIG. 2 shows a detailed view of the part of the conveyor device on the right in FIG. 1, but on a larger scale;

FIG. 3 shows a plan view of the device in FIG. 2 in the direction of arrow III, some parts being omitted for the sake of clarity became;

FIG. 4 shows a section along the line IV-IV in FIG. 3; Figure 5 shows a section along the line V-V in Figure 2;

Figure 6 shows a detail of the left part of Figure 1, but on a larger scale;

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/ 3

Figure 7 is a plan view of part of the device in Figure 6 in the direction of arrow VII.

The conveyor device shown in Figure 1 is in part similar to the conveyor device described with reference to FIG Figures 3 to 10 in the above-mentioned patent application P 24 07 31.β is disclosed. Corresponding parts will be therefore only briefly described! as further details can be found in the relevant patent application.

A stack of package blanks is held in a funnel 10, from which the package blanks B individually by means of a suction pad 12 is removed; the suction pad 12 is connected to a suction source (not shown) by means of a valve 13 connected. Pairs of opposing conveyors 14 and 16 (see also FIG. 7) are arranged above the suction pad, the outlet of which is arranged at the lower left end of a slightly inclined bed 18. The suction pad 12 is attached to a mechanism that allows

that
offers, the suction pad, after it has gripped a package blank B, moves to the left and then upwards (in Figure 1) so that the package blank enters the gap between the conveyors 14, 16 when the suction on the suction pad is interrupted. The package blank then travels up the conveyor and is then deposited substantially horizontally at the left end of the bed 18.

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A frame 20 (see also FIG. 4) is arranged at a distance from the bed and by means of a mechanism to be described below can be moved back and forth along the bed.

The frame 2G carries two shafts 22, 24 on which grippers 26 are attached at regular intervals; each gripper 26 of the shaft 22 is to a corresponding gripper 26 of the shaft 24 aligned, and the grippers of the two shafts are facing away from each other. The waves are (by a body that is described below) rotatable in opposite directions of rotation in order to be able to lift the grippers from the bed 18, as can best be seen from FIG. The free ends of the grippers are designed as claws 28 so that they are in their lower position grasp the rear edges of the pack blanks. During the right (in Figure 1} directed The back and forth movement of the frame becomes the rear edges of each package blank B lying on the bed by two Detected grippers, which thus convey the package blank to the right, while for the return movement of the frame after on the left the grippers are raised until they are lowered behind the rear edges of the next pack blank can. In this way, the pack blanks are gradually transformed into one by successive pairs of grippers pack forming wheel 29 (which does not form part of the present invention) for packing bundles of cigarettes therein can be. During the feeding movement of the package blanks along the bed, parts of each package blank become folded by a device 31 (Figure 7) and glue is applied to various parts of the package blank

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The mechanism for reciprocating the frame 20 is shown in FIGS. The frame is in the area its right end pivotally attached to one end of a long member 30, the other end to a short one Component 32 is pivotally mounted, which in turn is articulated to a stationary arrangement (not shown). Another one short component 34 is with the long component 30 on an axis 35, for example in the nut between its ends, pivotably connected The end of the component 34 remote from the long component 30 is also hinged to the stationary arrangement (not shown).

The left end of the frame 20 is attached by means of follower links 30 A, 32 A and 34 A, which are similar to the components 30, 32 and 34, except that they are below and behind the bed 18 (in Figure 1) for reasons of convenience. are arranged.

The back and forth movement is impressed on the component 30 by means of a driven crank 36 with a counterweight 3Θ; a connecting rod 40 is provided between the crank 36 and the axis of rotation 35 of the component 30. A back and forth motion of the component 30 between the position shown and the position to the left of it has the consequence that the lower end of the component 30 and thus the frame 20 along a substantially straight, parallel to the bed 1Θ Line moves.

70982 2/0294

The actuating device for actuating the gripper 26 is will now be described with reference to FIGS. 3 to 6.

A cam follower 50 is actuated by a cam 52 which is timed by a clutch 53 (Figure 1) is driven with the drive of the crank 36. The clutch can be engaged and disengaged during the return movement of the frame 20, as described below. The cam follower acts through a rod 54 on one substantially vertically extending lever 56 which is articulated in the vicinity of its center on a stationary arrangement. A tension spring 58, which is connected to the rod 54, presses the follower member into abutment with the cam 52. The upper end of the lever 56 carries a rail 59 which is in contact with a plurality of rollers 60. Each role is through a parallelogram linkage 62 with the Shaft 22 connected.

It should be noted at this point that there is no continuous There are shafts 22, 24 which extend along the entire bed 18: as can be seen in FIG Shafts divided into two sections which are individually removed from the frame 20 by means of quick release devices 25 to gain access to the bed 18. As can also be seen from Figure 7, the first pair of grippers (gripper 26 A) laterally extended so that their claws 28 A (Figure 1) extend between the separate belts of the conveyors 14 and 16 can; the second pair of grippers (grippers 26 B) as well as the first pair of grippers 26 A are mounted on shafts 22 A and 24 A, which have a greater distance from one another than the shafts 22 and 24. For the sake of simplicity, the conveyor / 7

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however, described as if all pairs of grippers were the same and as if there was only a single continuous pair of Waves 22 and 24 would exist.

When the cam follower 50 is moved to the left (Figure 4), during that portion of the cam cycle at which the cam follower is responsive to the rising portions of the cam occurs, the lever 56 is pivoted clockwise and it moves the roller 60 and linkage 62 to the right, whereby the shaft 22 is rotated clockwise (Figure 4). The shaft is rotated counterclockwise at the same time, and all Grippers 26 are thus lifted off the pack blanks B.

The rotary movement of the shaft 24 is derived from the shaft 22 by a linkage shown in FIG. A forked arm 64, which is attached to the shaft 22 engages a pin 66 at one end of an L-shaped lever 68. The other end of the lever 68 is attached by a member 70 to an arm 72 which in turn is attached to the shaft 24. Generated this way a clockwise rotational movement of the WBlIe 22 a rotational movement of lever 28 counterclockwise, pulling link 70 to the left so that arm 72 turns turn shaft 24 counterclockwise. A tension spring is connected to link 70 to move link 70 to the right Press, which biases shafts 22 and 24 clockwise and counterclockwise, respectively. So if that Cam member 50 represents the descending portion of cam 52

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reached, the grippers 26 return to the lower position in which they are shown.

Longitudinal grooves 78 (Figure 4) are in the bed 18 below the Claws 28 of the gripper 26 formed in order to form a free space for the claws 28 during their working stroke.

A number of holes (Figures 3 and 4) are provided along the center of the bed 18 which are connected to a suction source (not shown) are pre-tied. The resulting suction force acting on the pack blanks B ensures that the pack blanks are held firmly to the bed, especially during of the return stroke of the grippers 26 when the pack blanks stand still.

Arms 80 (FIG. 3) are attached to shafts 22, 24 (seen in the conveying direction of the blanks) in front of each gripper 26, which thus move up and down together with the grippers. A friction lining 82 is adjustably attached to each arm 80. The friction linings 82 are adjusted with respect to the shafts 22 and in such a way that they fit onto the pack blanks B. Apply a small amount of downward pressure while the grippers are in their lower position. Operational, when a package blank is conveyed by a pair of grippers 26 and the reciprocating mechanism is decelerated at the end of its stroke, the pair of friction linings 82 support the through the holes 76 on the package blank suction force exerted, and it prevents the pack blank from overshooting the position in which

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the grippers have come to rest.

During normal operation of the conveyor device (i.e. as long as the pack blanks are fed to the pack-forming wheel 29 are) the grippers 26 are raised and lowered at opposite ends of the reciprocating motion of the frame 20, as described above. However, if a package blank on the package-forming wheel 29 is not required, for example, if there is a brief delay in the delivery of the pack of cigarettes to be packed, a signal is sent to the Valve 13 released to interrupt suction for the suction pad 12 during the return stroke of the suction pad, thereby causing it is prevented from picking up further pack blanks. After a timed delay that is sufficient to that the one or two pack blanks already in the conveyors 14 and 16 are fed to the bed 18 during the return stroke of the frame, i.e. during that part of the cam cycle in that the grippers 26 are raised, disengaged: the operation of the coupling 53 and valve 13 can be controlled by any known logic circuit can be controlled. The frame 20 now continues to move back and forth, wherein however, the grippers are released so that the pack blanks are no longer fed to the wheel 29 in steps.

When the supply of the bundles of cigarettes is resumed, the valve 13 is opened during the return stroke of the suction pad 12 reopened. After a delay sufficient

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to feed the pack blanks into the conveyors 14 and 16, the clutch 53 is re-engaged at the correct time with respect to the reciprocating movement of the frame 20, so that there is again a continuous feed of the pack blanks

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Claims (5)

Patent claims: 1. Conveyor device for conveying objects, in particular pack blanks, with a flat, elongated one Area on which the objects are conveyed in the company while certain work processes are being carried out on them, a feeding device which is selectively operable to feed a sequence of articles to one end of the surface, a component which is arranged adjacent to the surface and movable to and fro along the surface, and a gripping device which is carried by the component at regular intervals along the surface by an actuating device (50-74) for actuating the gripping device (26) in time coordination with the outward and reciprocating the component (20), whereby objects (b) are grasped one after the other by the gripping device and stepwise conveyed away from one end of the surface (18), the actuation device comprising a control device, which is selectively operable to keep the gripping means disengaged so that the conveyance of the articles along the surface during the further back and forth movement of the component can be interrupted if the mode of operation of the Feeder has been interrupted. / 2 709822/0294 ORiGiNAL INSPECTED 2. Conveyor device according to claim 1, characterized in that the actuating device has a driven cam (52) for actuating the gripping device and a coupling (53) through which the drive of the cam runs and which can be disengaged and re-engaged during the return stroke of the component (20) which can be moved back and forth. 3. Conveyor device according to claim 1 or 2, characterized in that that the gripping device comprises grippers (26) which are pivotable for a reciprocating movement with respect to of the component that can be moved back and forth in order to be able to grasp and release the objects. 4. Conveyor according to claim 3, characterized in that that the grippers are arranged in pairs, the two grippers of each pair in opposite directions are pivotable. 5. Conveyor device according to one of claims 1 to 4, characterized in that the elongated surface (18) with suction- smile (76) is provided so that the objects are held by suction on the surface. 709822/0294 ORiGiNAL INSPECTED