Cutting device for opening and emptying textile bulk containers and bulk material collection device

Abstract

Cutting device (1; 101; 201) for opening and emptying textile bulk material containers by creating an opening tab in the bulk material container, wherein the cutting device (1; 101; 201) comprises a crown-like blade arrangement (2; 102; 202) onto which the bulk material container can be placed and which has a plurality of cutting blades connected to one another, which are serrated or together form serrations (3a; 103a; 203a; 3b; 103b) and have serrated tips (6a; 106a; 206a; 6b; 106b) pointing in a vertical direction of impact, and wherein the blade arrangement (2; 102; 202) runs in plan view at least partially along the sides of a plan area which, in terms of its size, corresponds to the area of ​​the opening tab to be created in the textile bulk material container.

Description

[0001] The invention relates to a cutting device for opening and emptying textile bulk material containers, preferably so-called big bags. Furthermore, the invention relates to a bulk material collection device comprising a cutting device according to the invention.

[0002] The invention is suitable for opening and emptying so-called big bags, flexible bulk containers, FIBCs (Flexible Intermediate Bulk Containers), jumbo bags, bulk bags and container bags.

[0003] Big bags are flexible textile bulk containers with a typical capacity of 300 to 2500 liters and are used for the worldwide shipping and storage of powdered, granulated, or granular to lumpy bulk materials. Big bags are available with a closed bottom or with a centrally located outlet spout in the bottom, which is tied from the outside before filling the big bag. Big bags are usually emptied by opening the outlet spout by manually loosening the ties or by manually cutting open the bottom with a sharp object, such as a knife.

[0004] Both manually loosening the outlet spout lacing and manually cutting open the big bag bottom have the disadvantage that the operator places their hands underneath the big bag, which can weigh up to two tons, and thus exposes themselves to the risk of injury if the contents empty or if the bag hanging from the bag becomes detached or torn from the lifting device required for this purpose. The operator is also exposed to severe contamination from the leaking contents.

[0005] In addition, due to compaction and cohesive properties, various bulk materials tend not to flow out of the big bag at all or only poorly at the outlet nozzles, which are often too small in diameter.

[0006] From CN114604487 A, an aluminum oxide big bag cutting device is known, comprising a base, a pointed cone welded to the center of the base, and a blade carrier welded to the edge of the base, the underside of the blade carrier being firmly connected to the edge of the base. The top side of the blade carrier is firmly connected to the top side of the pointed cone, and a plurality of blades are arranged on the blade carrier. A bag (big bag) placed on the cutting device is cut open by the weight of its contents to create a slit through which the contents are to flow out. However, the described device is not suitable for use with big bags with outlet spouts, since the tied outlet spout cannot be severed or can only be severed inadequately by the blades.

[0007] EP 3 057 874 B1 discloses a bag-opening device for opening a bag containing bagged goods. The device comprises a fastening device for attaching the bag-opening device to an associated bag-goods receiving container and a prong bridge connected to the fastening device, which is curved toward the top and has one or more prongs on the top for opening the bag. Such a prong bridge also appears unsuitable for cutting through a tied-together outlet spout.

[0008] The object of the invention is to provide a system for the simple, fast and safe opening of big bags without manual intervention and for the creation of the largest possible outlet cross-section in order to improve the discharge of bridging bulk materials.

[0009] The problem is solved by a cutting device having the features according to claim 1. Further developments are specified in the dependent claims.

[0010] The cutting device according to the invention is suitable for opening and emptying textile bulk containers by creating an opening flap in the bulk container. For this purpose, the cutting device comprises a crown-like blade arrangement onto which the bulk container can be placed. The blade arrangement has a plurality of interconnected, serrated or jointly forming serrated cutting blades with serrated tips pointing in a vertical direction. The blade arrangement extends in plan view along the sides of a plan area, the size of which corresponds to the area of ​​the opening flap to be created in the textile bulk container.

[0011] According to a particularly advantageous embodiment of the invention, the crown-like blade arrangement is interrupted on one side of the floor plan, so that at least one area along this side is not provided with cutting blades. The length of the area not provided with cutting blades corresponds to the length of an uncut area of ​​the opening flap in the textile bulk material container, along which the opening flap remains connected to the bulk material container after opening.

[0012] The invention relates to a crown-like blade arrangement with prongs projecting upwards or in the direction of impact. According to one embodiment of the invention, the prongs are arranged in plan view along at least n-1 sides of an n-sided plan area, where n is a natural number of at least 3. According to a preferred embodiment of the invention, the crown-like blade arrangement extends in plan view along n-1 sides of the n-sided plan area, while no cutting blade is arranged on an n-th side of the plan area, or at least a region of the n-th side is not provided with cutting blades.

[0013] According to a particularly advantageous embodiment of the invention, the floor plan area or the size of the opening tab to be produced in the textile bulk material container has a quadrangular, preferably square shape, wherein the crown-like blade arrangement runs continuously only on three sides of the quadrangular or square floor plan area.

[0014] If the bulk material container, for example a big bag, is placed onto the blade arrangement, which can also be referred to as a knife crown, using a lifting device, usually a crane or forklift, the prongs, with their pointed tips pointing upwards (i.e. in the direction of the attached textile bulk material container), cut through the textile into the base of the bulk material container due to the weight of the filled textile bulk material container, creating the aforementioned n-sided opening tab. The n-sided opening tab created in this way then folds down under the weight of the contents, allowing the bulk material to flow out very easily. The textile opening tab hangs on its uncut side at the base of the textile bulk material container and is not lost with the flowing contents.If the side lengths of the n-sided blade arrangement are larger than an outlet nozzle usually sewn into the bottom of a textile bulk material container, the cutting device cuts around the outlet nozzle and can therefore also be used to open corresponding textile bulk material containers or big bags.

[0015] The blade arrangement is preferably mounted on a blade holder structure, which according to an advantageous embodiment of the invention is made of steel. The blade holder structure can be mounted in a hopper or in a container intended to receive the outflowing contents of the textile bulk material container. Thus, a further aspect of the invention relates to a bulk material collecting device comprising a hopper and / or a container and a cutting device according to the invention, wherein the cutting device is positioned on the hopper or on the container or within the hopper or container such that a textile bulk material container can be placed on top for cutting a tab such that bulk material flows from the placed and opened bulk material container through the hopper and / or into the container.

[0016] The cutting process described above takes only a few seconds. This allows many bulk containers to be emptied in a short time. An operator does not come into contact with the discharged contents of the bulk container, as is usually the case when operating a discharge spout. This is particularly advantageous when handling hazardous bulk materials. The knotted discharge spout does not require laborious untying or manual cutting.

[0017] Preferably, each prong of the crown-like blade arrangement is formed by a pair of upright cutting blades that slope obliquely from the upwardly pointing prong tip to an adjacent cutting blade or to one end of the crown-like blade arrangement. Side prongs advantageously form at least a portion of the prongs, with these side prongs each extending with both cutting blades along the same side of the n-sided plan area of ​​the crown-like blade arrangement.

[0018] According to one embodiment, corner prongs form part of the prongs, with these corner prongs - each starting from the prong tip - sloping in different directions along two different sides of the n-sided floor plan. According to an alternative embodiment, no corner prongs are formed, but rather - each starting from a corner point where two side prongs running along different sides of the n-sided floor plan meet - an outwardly projecting cutting blade is arranged as the corner blade, with its cutting edge pointing in the vertical direction of impact. An incision made by the corner blades in the bulk material container to be opened ensures that the connection between the tab and the bulk material container is reliably severed during the opening process in the corresponding corner area, even without the aid of a corner prong. As a rule, all cutting blades in the blade arrangement are made of hardened steel.

[0019] Further details, features, and advantages of embodiments of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. They show: Fig. 1: a perspective view of a cutting device for opening and emptying textile bulk containers according to a first embodiment, Fig. 2: a bulk material collecting device as an assembly of a funnel and a cutting device according to Fig. 1, Fig. 3: a perspective view of a cutting device for opening and emptying textile bulk containers according to a second embodiment, Fig. 4: a bulk material collecting device as an assembly of a funnel and a cutting device according to Fig. 3, and Fig. 5: a perspective view of a cutting device for opening and emptying textile bulk containers according to a third embodiment.

[0020] The Fig. 1 shows a perspective view of a cutting device 1 for opening and emptying textile bulk containers according to a first embodiment of the invention. This cutting device 1 is suitable for opening and emptying textile bulk containers by creating a square opening tab in the bulk container. For this purpose, the cutting device 1 comprises a crown-like blade arrangement 2, onto which the bulk container can be placed and which is formed by a plurality of pairs of two upright, abutting cutting blades 4a1, 5a1; 4a2, 5a2; 4a3, 5a3; 4a4, 5a4; arranged next to one another, each forming prongs 3a1; 3a2; 3a3; 3a4; 3a5; 3a6; 3b1; 3b2; 3b3; 3b4. 4a5, 5a5; 4a6, 5a6; 4b1, 5b1; 4b2, 5b2; 4b3, 5b3; 4b4, 5b4, wherein each prong 3a1; 3a2; 3a3; 3a4; 3a5; 3a6; 3b1; 3b2; 3b3; 3b4 has a prong tip 6a1; 6a2; 6a3; 6a4; 6a5; 6a6; 6b1; 6b2; 6b3; 6b4,which points in a vertical direction of impact for opening the textile bulk container and from which the two cutting blades 4a1, 5a1; 4a2, 5a2; 4a3, 5a3; 4a4, 5a4; 4a5, 5a5; 4a6, 5a6; 4b1, 5b1; 4b2, 5b2; 4b3, 5b3; 4b4, 5b4 of the pair forming the prong 3a1; 3a2; 3a3; 3a4; 3a5; 3a6; 3b1; 3b2; 3b3; 3b4 - in each case depending on the position of the prong 3a1; 3a2; 3a3; 3a4; 3a5; 3a6; 3b1; 3b2; 3b3; 3b4 in the crown-like blade arrangement 2 - either to an adjacent cutting blade 4a1; 5a1; 4a2; 5a2; 4a3; 5a3; 4a4; 5a4; 4a5; 5a5; 4a6; 5a6; 4b1; 5b1; 4b2; 5b2; 4b3; 5b3; 4b4; 5b4 or to one of two ends 7, 8 of the crown-like blade arrangement 2. The crown-like blade arrangement 2 runs continuously in plan view along three sides 9, 10, 11 of a quadrangular plan area, which corresponds in size to the area of ​​the quadrangular opening flap to be created in the textile bulk material container.and only partially along the fourth side 12 of the quadrangular plan area, since there it ends at the two opposite ends 7, 8, between which no cutting blade is arranged. Along each of the three sides 9, 10, 11, along which the crown-like blade arrangement runs uninterrupted, two prongs 3a1, 3a2; 3a3, 3a4; 3a5, 3a6, referred to below as side prongs, are arranged, which each run with both cutting blades 4a1, 5a1; 4a2, 5a2; 4a3, 5a3; 4a4, 5a4; 4a5, 5a5; 4a6, 5a6 along the same of the three sides 9, 10, 11 of the quadrangular plan area of ​​the crown-like blade arrangement 2. The length of the area not provided with cutting blades between the opposite ends 7,8 of the length of a non-cut area of ​​the opening flap in the opened textile bulk container. At the corners of the rectangular floor plan, a prong tip 6b1; 6b2; 6b3; 6b4 of one of the prongs 3b1; 3b2; 3b3; 3b4, referred to below as corner prongs, is formed, each of which is formed by two cutting blades 4b1, 5b1; 4b2, 5b2; 4b3, 5b3; 4b4, 5b4, which, starting from the prong tip 6b1; 6b2; 6b3; 6b4, slope downwards in different directions, i.e., along two different sides 9; 10; 11; 12 of the rectangular floor plan. In this case, a first corner prong 3b1 is formed by two cutting blades 4b1, 5b1, of which a first cutting blade 4b1 running along the fourth side 12 of the quadrangular ground plan area descends from the prong tip 6b1 to a first end 7 of the crown-like blade arrangement 2,while the other cutting blade 5b1 slopes down from the tooth tip 6b1 to a cutting blade 4a1 of an adjacent side tooth 3a1, which runs with both cutting blades 4a1, 5a1 along a first side 9 of the quadrangular plan area of ​​the crown-like blade arrangement 2. A second corner prong 3b2 is formed by two cutting blades 4b2 and 5b2, of which a first cutting blade 4b2 running along the first side 9 of the quadrangular plan area - starting from the prong tip 6b2 - descends to a cutting blade 5a2 of an adjacent side prong 3a2, which runs with both cutting blades 4a2, 5a2 along a first side 9 of the quadrangular plan area of ​​the crown-like blade arrangement 2, while the other cutting blade 5b2 - starting from the prong tip 6b2 - descends to a cutting blade 4a3 of an adjacent side prong 3a3, which runs with both cutting blades 4a3,5a3 runs along a second side 10 of the quadrangular plan area of ​​the crown-like blade arrangement 2, falls away. A third corner prong 3b3 is formed by two cutting blades 4b3 and 5b3, of which a first cutting blade 4b3, running along the second side 10 of the quadrangular plan area, slopes down from the prong tip 6b3 to a cutting blade 5a4 of an adjacent side prong 3a4, which runs with both cutting blades 4a4, 5a4 along the second side 10 of the quadrangular plan area of ​​the crown-like blade arrangement 2, while the other cutting blade 5b3, running from the prong tip 6b3, slopes down to a cutting blade 4a5 of an adjacent side prong 3a5, which runs with both cutting blades 4a5, 5a5 along a third side 11 of the quadrangular plan area of ​​the crown-like blade arrangement 2. Finally, a fourth corner prong 3b4 is formed by two cutting blades 4b4, 5b4.from which a first cutting blade 4b4, running along the third side 11 of the quadrangular plan area, descends from the serration tip 6b4 to a cutting blade 4a6 of an adjacent side serration 3a6, which runs with both cutting blades 4a6, 5a6 along a third side 11 of the quadrangular plan area of ​​the crown-like blade arrangement 2, while a second cutting blade 4b4, running along the fourth side 12 of the quadrangular plan area, descends from the serration tip 6b4 to a second end 8 of the crown-like blade arrangement 2. The crown-like blade arrangement 2 is supported by a blade holder structure 13, which has a serrated region 14 that at least partially corresponds to the blade arrangement 2.in which the individual cutting blades 4a1; 5a1; 4a2; 5a2; 4a3; 5a3; 4a4; 5a4; 4a5; 5a5; 4a6; 5a6; 4b1; 5b1; 4b2; 5b2; 4b3; 5b3; 4b4; 5b4 are fastened by means of fastening elements 15 such as screws or bolts. In the area between the ends 7, 8 of the crown-like blade arrangement 2, in which no cutting blades are arranged, a linear section 16 of the blade holder structure 13 is formed, which does not have a serrated shape and connects two ends 17 and 18 of the serrated area 14 of the blade holder structure 13 to one another. The blade holder structure 13 is attached to an inner side of a square support frame 19, which is formed by four interconnected connecting parts 20a, 20b, by means of fastening elements 21, for example by a screw connection.

[0021] In the Fig. 2 shows a bulk material collecting device 23 which comprises a hopper 24 and a cutting device 1 placed and fixed within the hopper 24, which is arranged in accordance with the Fig. 1. The cutting device 1 is positioned on the funnel 24 or within the funnel 24 in such a way that a textile bulk material container can be attached for cutting a flap in such a way that bulk material can flow from the attached and opened bulk material container through the funnel, for example, into a collecting container.

[0022] The Fig. Figure 3 shows a perspective view of a cutting device 101 for opening and emptying textile bulk containers according to a further embodiment of the invention. This cutting device 101 comprises a crown-like blade arrangement 102 onto which the bulk container can be placed and which is formed by a plurality of pairs of two upright, abutting cutting blades 104a1, 105a1; 104a2, 105a2; 104a3, 105a3; 104b1, 105b1; 104b2, 105b2; arranged in a row, each forming prongs 103a1; 103a2; 103a3; 103b1; 103b2; 103b3; 103b4. 104b3, 105b3; 104b4, 105b4 is formed, wherein each prong 103a1; 103a2; 103a3; 103b1; 103b2; 103b3; 103b4 has a prong tip 106a1; 106a2; 106a3; 106b1; 106b2; 106b3; 106b4, which points in a vertical direction of impact for opening the textile bulk material container and from which the two cutting blades 104a1, 105a1; 104a2, 105a2; 104a3, 105a3; 104b1, 105b1; 104b2, 105b2; 104b3, 105b3;104b4, 105b4 of the pair forming the prong 103a1; 103a2; 103a3; 103b1; 103b2; 103b3; 103b4 - depending on the position of the prong 103a1; 103a2; 103a3; 103b1; 103b2; 103b3; 103b4 in the crown-like blade arrangement 2 - either to an adjacent cutting blade 104a1; 105a1; 104a2; 105a2; 104a3; 105a3; 104b1; 105b1; 104b2; 105b2; 104b3; 105b3; 104b4;105b4 or slope diagonally down to one of two ends 107, 108 of the crown-like blade arrangement 102. The crown-like blade arrangement 102 runs continuously along three sides 109, 110, 111 of a quadrangular plan area, the size of which corresponds to the area of ​​the quadrangular opening flap to be created in the textile bulk material container, and only partially along the fourth side 112 of the quadrangular plan area, since it ends there at the two opposite ends 107, 108, between which no cutting blade is arranged. Along each of the three sides 109, 110, 111, along which the crown-like blade arrangement 102 runs continuously, there is a side prong 103a1, 103a2; 103a3, each provided with both cutting blades 104a1, 105a1; 104a2, 105a2;104a3, 105a3 runs along the same of the three sides 109, 110, 111 of the quadrangular plan area of ​​the crown-like blade arrangement 102. The length of the area not provided with cutting blades between the opposite ends 107, 108 corresponds to the length of an uncut area of ​​the opening flap in the opened textile bulk material container. At the corners of the quadrangular plan area, a serrated tip 106b1; 106b2; 106b3; 106b4 is formed, one of a total of four corner prongs 103b1; 103b2; 103b3; 103b4, each of which is formed by two cutting blades 104b1, 105b1; 104b2, 105b2; 104b3, 105b3; 104b4, 105b4 are formed, which, starting from the prong tip 106b1; 106b2; 106b3; 106b4, slope diagonally in different directions, i.e., along two different sides 109; 110; 111; 112 of the quadrangular plan area. In contrast to the embodiment according to ; Fig. 1, the number of corner points 103b1; 103b2; 103b3; 103b4; is therefore greater than the number of side points 103a1, 103a2; 103a3. In this case, a first corner prong 103b1 is formed by two cutting blades 104b1, 105b1, of which a first cutting blade 104b1 running along the fourth side 112 of the quadrangular plan area - starting from the prong tip 106b1 - slopes down to a first end 107 of the crown-like blade arrangement 102, while the other cutting blade 105b1 - starting from the prong tip 106b1 - slopes down to a cutting blade 104a1 of an adjacent side prong 103a1, which runs with both cutting blades 104a1, 105a1 along a first side 109 of the quadrangular plan area of ​​the crown-like blade arrangement 102.A second corner prong 103b2 is formed by two cutting blades 104b2 and 105b2, of which a first cutting blade 104b2, running along the first side 109 of the quadrangular plan area - starting from the prong tip 106b2 - slopes down to the cutting blade 105a1 of the adjacent side prong 103a1, which runs with both cutting blades 104a1, 105a1 along a first side 109 of the quadrangular plan area of ​​the crown-like blade arrangement 102, while the other cutting blade 105b2 - starting from the prong tip 106b2 - slopes down to a cutting blade 104a2 of an adjacent side prong 103a2, which runs with both cutting blades 104a2, 105a2 along a second side 110 of the quadrangular plan area of ​​the crown-like blade arrangement 102 runs, drops.A third corner prong 103b3 is formed by two cutting blades 104b3 and 105b3, of which a first cutting blade 104b3, running along the second side 110 of the quadrangular plan area, descends from the prong tip 106b3 to the cutting blade 105a2 of the adjacent side prong 103a2, which runs with both cutting blades 104a2, 105a2 along the second side 110 of the quadrangular plan area of ​​the crown-like blade arrangement 102, while the other cutting blade 105b3, running from the prong tip 106b3, descends to a cutting blade 104a3 of an adjacent side prong 103a3, which runs with both cutting blades 104a3, 105a3 along a third side 111 of the quadrangular plan area of ​​the crown-like blade arrangement 102 runs, drops.Finally, a fourth corner prong 103b4 is formed by two cutting blades 104b4, 105b4, of which a first cutting blade 104b4 running along the third side 111 of the quadrangular plan area - starting from the prong tip 106b4 - descends to the cutting blade 104a3 of the adjacent side prong 103a3, which runs with both cutting blades 104a3, 105a3 along a third side 111 of the quadrangular plan area of ​​the crown-like blade arrangement 102, while a second cutting blade 104b4 running along the fourth side 112 of the quadrangular plan area descends from the prong tip 106b4 to a second end 108 of the crown-like blade arrangement 102.The crown-like blade arrangement 102 is supported by a blade holder structure 113, which has a serrated region 114 that at least partially corresponds to the blade arrangement 102 and in which the individual cutting blades 104a1; 105a1; 104a2; 105a2; 104a3; 105a3; 104b1; 105b1; 104b2; 105b2; 104b3; 105b3; 104b4; 105b4 are fastened by means of fastening elements 115 such as screws or bolts. In the area between the ends 107, 108 of the crown-like blade arrangement 102, in which no cutting blades are arranged, a linear section 116 of the blade holder structure 113 is formed, which does not have a serrated shape and connects two ends 117 and 118 of the serrated area 114 of the blade holder structure 113 to each other.The blade holder structure 113 is attached to an inner side of a square support frame 119, which is formed by an arrangement of four connecting parts 120a, 120b, by means of fastening means 121, for example, a screw connection. Two opposite connecting parts 120a of the support frame 119 are each U-shaped, with the U-legs each pointing outward, so that the total of four U-legs can be used as fastening legs 122 for attaching the slicing device 101 within a bulk material collecting device.

[0023] In the Fig. 4 shows a bulk material collecting device 123 which comprises a hopper 124 and a cutting device 101 placed and fixed within the hopper 124, which is arranged in accordance with the Fig. 3. The cutting device is positioned on the funnel 124 or within the funnel 124 in such a way that a textile bulk material container can be placed on top for cutting a flap so that bulk material can flow from the attached and opened bulk material container through the funnel 124, for example, into a collecting container.

[0024] The Fig. 5 shows a perspective view of a cutting device 201 for opening and emptying textile bulk containers according to a third embodiment of the invention. The cutting device 201 comprises a crown-like blade arrangement 202 onto which the bulk container can be placed and which is formed by three pairs of two upright, abutting cutting blades 204a1, 205a1; 204a2, 205a2; 204a3, 205a3 arranged next to one another, each forming prongs 203a1; 203a2; 203a3, wherein each prong 203a1; 203a2; 203a3 has a prong tip 206a1; 206a2; 206a3, which points in a vertical direction of impact for opening the textile bulk material container and from which the two cutting blades 204a1, 205a1; 204a2, 205a2; 204a3, 205a3 of the pair forming the prong 203a1; 203a2; 203a3 - each depending on the position of the prong 203a1; 203a2; 203a3 in the crown-like blade arrangement 202 - to a cutting blade 205a1; 204a2; 205a2;204a3 of an adjacent prong 203a1; 203a2; 203a3 or to one of two obliquely outwardly projecting end blades 225a1, 225a2, which are placed at two opposite ends 207, 208 of the crown-like blade arrangement 202 and whose cutting edge points in the vertical direction of impact. In contrast to the blades shown in Figures ; Fig. 1 and Fig. In the embodiments shown in Figure 3, the crown-like blade arrangement 202 of the slicing device 201 does not have any corner prongs. However, in addition to the two end blades 225a1, 225a2, the crown-like blade arrangement 202 comprises two further cutting blades that protrude obliquely outward and point with their cutting edge in the vertical direction of impact. These cutting blades each extend from a corner point formed by adjacent prongs 203a1, 203a2; 203a2, 203a3, and are therefore referred to below as corner blades 225b1, 225b2. The crown-like blade arrangement 202 is supported by a blade holder structure 213, which is configured to at least partially correspond to the blade arrangement.Thus, the blade holder structure 213 has a serrated area 214 and a total of four obliquely outwardly directed blade holder parts 226a1, 226a2, 226b1, 226b2, to which the end blades 225a1, 225a2 and the corner blades 225b1, 225b2 are each fastened by means of fastening elements 215. The crown-like blade arrangement 202 can be connected to the outwardly directed blade holder parts 226a1, 226a2, 226b1, 226b2, which have corresponding connecting areas, by means of fastening elements to a . Fig. 5 support frame not shown or directly in a hopper or container. List of reference symbols 1; 101; 201 cutting device 2; 102; 202 crown-like blade arrangement 3a(1-6); 103a(1-3); 203a(1-3) point, side points 3b(1-4); 103b(1-4) Point, corner point 4a(1-6); 104a(1-3); 204a(1-3) Cutting blade of a side serration 5a(1-6); 105a(1-3); 205a(1-3) Cutting blade of a side serration 4b(1-4); 104b(1-4) cutting edge of a corner prong 5b(1-4); 105b(1-4) cutting edge of a corner prong 6a(1-6); 106a(1-3); 206a(1-3) Point of a side point 6b(1-4); 106b(1-4) Point of a corner point 7; 107; 207 End of the blade arrangement 8; 108; 208 End of the blade arrangement 9; 109 first side of a quadrangular floor plan 10; 110 second side of a quadrangular floor plan 11; 111 third side of a quadrangular floor plan 12; 112 fourth side of a quadrangular floor plan 13; 113; 213 Blade holder structure 14; 114; 214 serrated area of ​​the blade holder structure 15; 115; 215 fasteners 16; 116; 216 non-serrated section of the blade holder structure 17; 117; 217 End of the serrated area of ​​the blade holder structure 18; 118; 218 End of the serrated area of ​​the blade holder structure 19; 119; 219 support frame 20a; 120a; connecting part 20b; 120b connecting part 21; 121; 221 Fasteners 122 mounting legs 23; 123 Bulk material collection facility 24; 124 funnels 225a(1-2) End blade at one end of the crown-like blade arrangement 225b(1-2) Corner blade at a corner of the crown-like blade arrangement between two side prongs 226a(1-2) Blade holder part 226b(1-2) Blade holder part QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 114604487 A

[0006] EP 3 057 874 B1

[0007]

Claims

[1] Cutting device (1; 101; 201) for opening and emptying textile bulk material containers by creating an opening tab in the bulk material container, wherein the cutting device (1; 101; 201) comprises a crown-like blade arrangement (2; 102; 202) onto which the bulk material container can be placed and which has a plurality of cutting blades connected to one another, which are serrated or together form serrations (3a; 103a; 203a; 3b; 103b) and have serrated tips (6a; 106a; 206a; 6b; 106b) pointing in a vertical direction of impact, and wherein the blade arrangement (2; 102; 202) runs in plan view at least partially along the sides of a plan area which, in terms of its size, corresponds to the area of ​​the opening tab to be created in the textile Bulk container corresponds. [2] Slicing device (1; 101; 201) according to claim 1, characterized bythat on one side (12; 112) of the floor plan area, the blade arrangement (2; 102; 202) is interrupted, so that at least one area along this side is not provided with cutting blades, wherein the length of the area not provided with cutting blades corresponds to the length of a non-cut area of ​​the opening tab in the textile bulk material container, along which the opening tab remains connected to the bulk material container after opening. [3] Slicing device (1; 101; 201) according to claim 1 or 2, characterized by that the blade arrangement (2; 102; 202) runs in plan along at least n-1 sides of an n-cornered plan area, where n is a natural number of at least 3. [4] Slicing device (1; 101; 201) according to claim 3, characterized bythat the blade arrangement (2; 102; 202) runs in plan view along n-1 sides of the n-cornered plan area, while on an nth side of the plan area no cutting blade is arranged or at least an area of ​​the nth side is not provided with cutting blades. [5] Slicing device (1; 101; 201) according to claim 4, characterized by in that the blade arrangement (2; 102; 202) runs continuously along three sides (9, 10, 11; 109, 110, 111) of a quadrangular plan, while at least in one area on the fourth side (12; 112) no cutting blade is arranged. [6] Slicing device (1; 101; 201) according to one of claims 1 to 5, further comprising a blade holder structure (13; 113; 213) on which the blade assembly (2; 102; 202) is mounted. [7] Slicing device (1; 101; 201) according to one of claims 1 to 6, characterized bythat each prong (3a; 103a; 203a; 3b; 103b) is formed by a pair of upright cutting blades (4a, 5a; 4b, 5b; 104a, 105a; 204a, 205a; 4b, 5b; 104b, 105b; 225a, 225b) sloping from the upwardly pointing prong tip (6a; 106a; 206a; 6b; 106b) to an adjacent cutting blade (4a, 5a; 104a, 105a; 204a, 205a; 4b, 5b; 104b, 105b; 225a, 225b) or to an end (7, 8; 107, 108; 207, 208) of the crown-like blade arrangement (2; 102; 202), 205a; 104b, 105b). [8] Slicing device (1; 101; 201) according to one of claims 3 to 7, characterized by that at least some of the teeth (3a; 103a; 203a; 3b; 103b) are side teeth (3a; 103a; 203a) which each run with both cutting blades (4a, 5a; 104a, 105a; 204a, 205a; 4b, 5b; 104b, 105b) along the same side (9; 10; 11; 109; 110; 111) of the n-sided plan area of ​​the crown-like blade arrangement (2; 102; 202). [9] Slicing device (1; 101; 201) according to one of claims 3 to 8, characterized bythat some of the points (3a; 103a; 203a; 3b; 103b) are corner points (3b; 103b) which, starting from the point (6b; 106b), slope downwards in different directions along two different sides (9, 10; 10, 11; 11, 12; 109, 110; 110, 111; 111, 112) of the n-sided ground plan area. [10] Slicing device (1; 101; 201) according to claim 9, characterized by that no corner prongs are formed and that, starting from a corner point at which two side prongs (203a1, 203a2; 202a2, 202a3) running along different sides of the n-sided ground plan area meet, an outwardly projecting cutting blade is arranged as a corner blade (225b1; 225b2) with its cutting edge pointing in the vertical direction of impact. [11] Slicing device (1; 101; 201) according to one of claims 1 to 10, characterized bythat the cutting blades (4a, 5a; 104a, 105a; 204a, 205a; 4b, 5b; 104b, 105b; 225a, 225b) are made of hardened steel. [12] Bulk material collecting device, comprising a funnel (24; 124) and / or a container and a cutting device (1; 101; 201) according to one of claims 1 to 11, which is placed on the funnel (24; 124) or on the container or within the funnel or container in such a way that a textile bulk material container can be placed on top for cutting a tab in such a way that bulk material flows from the placed and opened bulk material container through the funnel and / or into the container.

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