Corrugated board edge cutting device

Abstract

The invention belongs to the technical field of corrugated paper processing, and particularly relates to a corrugated board edge cutting device which comprises an edge cutting table, the top of the edge cutting table is provided with a containing groove communicated with the two opposite side walls of the edge cutting table, and the bottom wall of the opening end of one side edge of the containing groove is provided with a discharging opening; the interval layering bearing assembly is arranged at the opening end of the side edge, close to the discharging opening, of the containing groove; the pushing assembly is arranged in the open end of the other side edge, opposite to the interval layering bearing assembly, of the containing groove. The number of the interval layering pressing assemblies is two, and the interval layering pressing assemblies are arranged in the two opposite side walls of the opening end of the side edge, close to the discharging opening, of the containing groove correspondingly; and the edge cutting assembly is arranged above the opening end of the side edge, close to the discharging opening, of the containing groove and used for solving the problems that cutting is conducted in a single-layer cutting mode, so that the cutting efficiency is low, and the production efficiency is seriously affected.

Description

Technical Field

[0001] The invention belongs to the technical field of corrugated paper processing, and in particular relates to a corrugated paperboard trimming device. Background Art

[0002] Corrugated cardboard is a plate-like material made of noodle paper and corrugated paper formed by corrugating rollers. It is generally divided into single corrugated cardboard and double corrugated cardboard. According to the size of the corrugation, it is divided into five types: A, B, C, E, and F. The application of corrugated cardboard has a long history. It has the advantages of low cost, light weight, easy processing, high strength, excellent printing adaptability, and convenient storage and transportation.

[0003] During the processing of corrugated cardboard, it is necessary to ensure the consistency of its size to meet the requirements of subsequent processing and use. Therefore, after the corrugated cardboard is manufactured, a trimming device is needed to trim the corrugated cardboard. However, since there are a large number of gaps in the middle of the corrugated cardboard, during the trimming process, in order to prevent the cut edges of the corrugated cardboard from collapsing and deforming, a single-layer cutting method is generally used, which results in low cutting efficiency and seriously affects production efficiency. Summary of the invention

[0004] Based on the problems mentioned in the above background technology, the present invention provides a corrugated cardboard trimming device, which is used to solve the problem that cutting by a single-layer cutting method leads to low cutting efficiency and seriously affects production efficiency.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A corrugated paperboard trimming device, comprising:

[0007] A trimming table, wherein the top of the trimming table is provided with a placement groove intersecting with two opposite side walls thereof, and a blanking opening is provided on the bottom wall of an open end of one side of the placement groove;

[0008] An interval layered receiving component, wherein the interval layered receiving component is arranged at an opening end of one side of the placement slot close to the blanking opening;

[0009] A pushing component, the pushing component is arranged in the other side opening end of the placement groove opposite to the spaced layered receiving component;

[0010] The spaced layered pressing components are provided with two spaced layered pressing components, and are respectively arranged in two opposite side walls of the opening end of one side of the placement groove close to the blanking port;

[0011] The trimming assembly is arranged above an opening end of one side of the placement slot close to the blanking opening.

[0012] On the basis of the above technical solution, the present invention also makes the following improvements:

[0013] Furthermore, the spaced and layered receiving component includes an assembly box, which is arranged at an open end of one side of the placement slot near the blanking port, and two rows of through holes are arranged in a vertical array on the side wall of the assembly box opposite to the placement slot, and the number of through holes in each row is set to be multiple, and an electric telescopic rod is arranged on the inner side wall of the assembly box opposite to the through hole, and a base plate is arranged at the telescopic end of the electric telescopic rod, and a row of receiving plates are arranged on both sides of the side wall of the placement slot opposite to the base plate, and each row of receiving plates is respectively located in the corresponding row of through holes.

[0014] Furthermore, the pushing component includes a card slot, two of which are provided and are respectively arranged in two opposite side walls of the other side opening end of the placement slot opposite to the assembly box, and a stabilizing column is provided in each of the two card slots, a back plate is sleeved between the two stabilizing columns, and an extrusion spring is provided between the side wall of the back plate facing away from the assembly box and the slot wall of the card slot; a card hole is provided on the side wall of the placement slot located above the card slot, and a pin is inserted into the card hole.

[0015] Furthermore, the interval layered pressing assembly includes an installation slot, a storage slot, a mounting frame and a clamping assembly, the installation slot being vertically arranged in the side wall of an open end of one side of the placement slot near the blanking opening, the storage slot being provided with a plurality of, and the number of the storage slots is the same as the number of each receiving plate in each column of receiving plates, and being arranged in an array along the vertical direction in the side wall of an open end of one side of the placement slot near the blanking opening, one end of each of the storage slots being connected to the installation slot, a mounting shaft being rotatably arranged in the installation slot, a motor being provided at the bottom of the installation shaft, and a plurality of pressing plates being arrayed on the prismatic portion of the installation shaft, the number of the pressing plates being the same as the number of the storage slots on the corresponding side wall of the placement slot, and a rubber sleeve being provided on the upper and lower surfaces of the places where each pressing plate and the installation shaft are sleeved, the pressing plates on the installation shaft are respectively located on the lower surfaces of the receiving plates in the corresponding columns, and correspond to the positions of the receiving slots on the corresponding side wall of the placement slot, the mounting frame being arranged at the top of the installation slot, and the clamping assembly being arranged on the mounting frame and the mounting shaft.

[0016] Furthermore, the clamping assembly includes a spring, a second motor, a stud and a screw sleeve. There are multiple springs, and the number is the same as the number of rubber sleeves. Each spring is located in a corresponding rubber sleeve. The second motor and the stud are both arranged on a mounting frame. The top of the stud is connected to the driving shaft of the second motor, and the bottom of the stud is rotatably sleeved with the top of the mounting shaft. The screw sleeve is screwed into the stud, and the bottom of the screw sleeve abuts against the top of the rubber sleeve at the top.

[0017] Furthermore, the trimming assembly includes a hydraulic telescopic rod and a cutter. The hydraulic telescopic rod is arranged above the opening end of one side of the placement slot close to the blanking port through a vertical frame. The telescopic end of the hydraulic telescopic rod is provided with a cutter, and the cutter is located above the blanking port.

[0018] Furthermore, the length of each receiving plate in each column of the receiving plates gradually increases from top to bottom.

[0019] Beneficial effects of the present invention:

[0020] 1. By combining the trimming table, the spacing and layering receiving components and the pushing component, each corrugated cardboard can be stacked in the placement groove of the trimming table during use, and then the pushing component is used to push each corrugated cardboard, so that one end of each corrugated cardboard is pushed into the spacing and layering receiving components, so that each corrugated cardboard is placed in a vertically spaced manner using the spacing and layering receiving components, so that space is maintained between adjacent corrugated cardboards.

[0021] 2. By setting up the spacing layer pressing component, after the corrugated cardboards are placed in a vertically spaced distribution by using the spacing layer receiving component and keeping space between adjacent corrugated cardboards, the spacing layer pressing component is used to pad the bottom of each corrugated cardboard to be trimmed, so as to support the bottom of each corrugated cardboard to be trimmed, and also to press the edge of each corrugated cardboard to be trimmed to keep it tight.

[0022] 3. By setting the trimming assembly, when the set interval layered pressing assembly is used to pad the bottom of the to-be-trimmed edge of each corrugated cardboard, the bottom of the to-be-trimmed edge of each corrugated cardboard is supported, and the to-be-trimmed edge of each corrugated cardboard is pressed to keep it tight, the trimming assembly can be used to cut the to-be-trimmed edge of each corrugated cardboard, so that multiple corrugated cardboards can be cut at one time; and because the interval layered pressing assembly supports the bottom of the to-be-trimmed edge of each corrugated cardboard and presses the to-be-trimmed edge, it can avoid the phenomenon of edge collapse and deformation near the cutting edge of each corrugated cardboard when trimming multiple corrugated cardboards at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0024] Figure 1 It is a structural diagram of a corrugated paperboard trimming device of the present invention;

[0025] Figure 2 A schematic diagram of a corrugated paperboard trimming device according to the present invention;

[0026] Figure 3 This is an internal structure diagram of a corrugated paperboard trimming device of the present invention;

[0027] Figure 4 It is a partial cross-sectional view of some components of a corrugated paperboard trimming device of the present invention;

[0028] Figure 5 The present invention is a planar cross-sectional view of a corrugated paperboard trimming device.

[0029] The attached drawings are marked as follows:

[0030] 101, trimming table; 102, placement slot; 103, blanking port; 201, assembly box; 202, electric telescopic rod; 203, base plate; 204, receiving plate; 205, through hole; 301, card slot; 302, stabilizing column; 303, abutment plate; 304, extrusion spring; 305, card hole; 306, latch; 401, installation slot; 402, storage slot; 403, installation frame; 404, installation shaft; 405, motor one; 406, pressing plate; 407, rubber sleeve; 408, spring; 409, motor two; 410, stud; 411, screw sleeve; 501, stand; 502, hydraulic telescopic rod; 503, cutter. DETAILED DESCRIPTION

[0031] like Figure 1 to Figure 5 As shown, a corrugated paperboard trimming device comprises:

[0032] The trimming table 101 has a placement groove 102 intersecting with two opposite side walls on the top of the trimming table 101. Corrugated cardboard can be placed in the placement groove 102. A drop opening 103 is provided on the bottom wall of an open end of one side of the placement groove 102. The drop opening 103 can facilitate the drop out of waste after trimming of the corrugated cardboard.

[0033] See also Figure 1 , Figure 3 and Figure 5, the spaced layered receiving component is arranged at an open end of one side of the placement groove 102 near the blanking port 103, the spaced layered receiving component includes an assembly box 201, the assembly box 201 is arranged at an open end of one side of the placement groove 102 near the blanking port 103, two rows of through holes 205 are arranged in a vertical array on the side wall of the assembly box 201 opposite to the placement groove 102, and the number of each through hole 205 in each row of through holes 205 is set multiple, an electric telescopic rod 202 is arranged on the inner side wall of the assembly box 201 opposite to the through hole 205, and a base plate 203 is arranged at the telescopic end of the electric telescopic rod 202, and a row of receiving plates 204 are arranged on both sides of the side wall of the substrate 203 opposite to the placement groove 102, and each row of receiving plates 204 is respectively located on the opposite In the through hole 205 that should be listed separately, the electric telescopic rod 202 can drive the base plate 203 and the receiving plate 204 to move. The receiving plate 204 is stored in the through hole 205 and does not extend into the placement groove 102 when the device is not used; the receiving plates 204 in each column of receiving plates 204 are arranged at intervals in the vertical direction, so that there is space between the upper and lower adjacent receiving plates 204, and a corrugated cardboard can be placed in each of the maintained spaces; the length of each receiving plate 204 in each column of receiving plates 204 is gradually extended from top to bottom, so that each receiving plate 204 in each column of receiving plates 204 presents a sense of ladder hierarchy, which can make it easier to send each corrugated cardboard into the space below the corresponding receiving plate 204;

[0034] When using the device, firstly, the electric telescopic rod 202 is used to drive the base plate 203 and the receiving plate 204 to move, so that the receiving plate 204 is moved out to the placement groove 102, and then one end of each corrugated cardboard is sequentially sent into the space below each receiving plate 204 to perform preliminary spacing and placement of each corrugated cardboard;

[0035] See also Figure 1 , Figure 2 and Figure 5, a pushing component, which is arranged in the other side opening end of the placement slot 102 opposite to the spaced layered receiving component, and the pushing component includes a card slot 301, and two card slots 301 are provided, and are respectively arranged in the two opposite side walls of the other side opening end of the placement slot 102 opposite to the assembly box 201, and a stabilizing column 302 is provided in each of the two card slots 301, and a push plate 303 is sleeved between the two stabilizing columns 302, and an extrusion spring 304 is provided between the side wall of the push plate 303 away from the assembly box 201 and the groove wall of the card slot 301, and the extrusion spring 304 can realize the movement of the push plate 303 in the direction close to the placement slot 102; the card slot 301 is located above the card slot A clamping hole 305 is provided on the side wall of the placement groove 102, and a latch 306 is inserted into the clamping hole 305. The clamping hole 305 and the latch 306 cooperate to position the abutment plate 303. Before feeding the corrugated cardboard into the space below each receiving plate 204, the abutment plate 303 needs to be moved away from the assembly box 201 so that the abutment plate 303 moves to the rear of the clamping hole 305, so that the extrusion spring 304 is compressed, and then the latch 306 is inserted into the clamping hole 305 so that the latch 306 abuts against the front of the abutment plate 303 to position the abutment plate 303, so that there is enough operating space to feed the corrugated cardboard into the space below each receiving plate 204.

[0036] After one end of each corrugated cardboard is sequentially fed into the space below each receiving plate 204 for preliminary spacing, the latch 306 is pulled out of the clamping hole 305. At this time, the squeezing spring 304 rebounds to push the push plate 303 to move close to the assembly box 201, prompting the push plate 303 to push one end of each corrugated cardboard, so that the feeding end of each corrugated cardboard moves to the outer wall of the assembly box 201, so that each corrugated cardboard is pushed into the space below the corresponding receiving plate 204, and the edges to be cut of each corrugated cardboard are all above the blanking port 103, so that each corrugated cardboard is placed in a vertically spaced distribution, so that there is space between adjacent corrugated cardboards;

[0037] See also Figure 1 , Figure 2 , Figure 4 and Figure 5, an interval layered pressing component, two interval layered pressing components are provided, and are respectively arranged in two opposite side walls of the opening end of one side of the placement slot 102 close to the blanking port 103, the interval layered pressing component includes an installation slot 401, a receiving slot 402, a mounting frame 403 and a clamping component, the installation slot 401 is vertically arranged in the side wall of the opening end of one side of the placement slot 102 close to the blanking port 103, a plurality of receiving slots 402 are provided, and the number is the same as the number of each receiving plate 204 in each column of receiving plates 204, and are arranged in an array along the vertical direction in the side wall of the opening end of one side of the placement slot 102 close to the blanking port 103, one end of each receiving slot 402 is connected with the installation slot 401, a mounting shaft 404 is rotatably provided in the installation slot 401, a motor 405 is provided at the bottom of the installation shaft 404, and the motor 405 provided can drive the installation shaft 404 to rotate;

[0038] A plurality of pressing plates 406 are sleeved in an array on the prismatic portion of the installation shaft 404. The pressing plates 406 can move up and down on the installation shaft 404. The number of the pressing plates 406 is the same as the number of the receiving slots 402 on the corresponding side wall of the placement slot 102. When each corrugated cardboard is fed into the space below each receiving plate 204, each pressing plate 406 is located inside the corresponding receiving slot 402, so that each pressing plate 406 is placed on the inner wall of the side wall of the placement slot 102, so as to avoid being in the placement slot 102 and affecting the feeding of the corrugated cardboard into the space below the receiving plate 204;

[0039] The upper and lower surfaces of each pressing plate 406 and the mounting shaft 404 are provided with rubber sleeves 407. The rubber sleeves 407 can position the pressing plate 406, so that when the pressing plate 406 is not pressed, each pressing plate 406 on the mounting shaft 404 can be respectively located at the lower surface of each receiving plate 204 in the corresponding column, and can correspond to the position of each receiving groove 402 on the corresponding side wall of the placement groove 102, that is, the pressing plate 406 can be smoothly retracted into the receiving groove 402, or the pressing plate 406 can be accurately located at the lower surface of the receiving plate 204 after being moved out of the receiving groove 402;

[0040] See also Figure 4 and Figure 5 The mounting frame 403 is arranged at the top of the mounting groove 401, and the clamping assembly is arranged on the mounting frame 403 and the mounting shaft 404. The clamping assembly includes a spring 408, a second motor 409, a stud 410 and a screw sleeve 411. A plurality of springs 408 are arranged, and the number is the same as the number of rubber sleeves 407. Each spring 408 is respectively located in the corresponding rubber sleeve 407. The arranged spring 408 can support and press the corresponding pressing plate 406.

[0041] Motor 2 409 and stud 410 are both arranged on mounting frame 403, and the top of stud 410 is connected with the driving shaft of motor 2 409, and motor 2 409 can drive stud 410 to rotate, and the bottom of stud 410 is rotatably sleeved with the top of mounting shaft 404, so that the top of mounting shaft 404 can be stabilized, and stud 410 and mounting shaft 404 can keep relative rotation, that is, mounting shaft 404 does not rotate when stud 410 rotates, or stud 410 does not rotate when mounting shaft 404 rotates; screw sleeve 411 is screwed into stud 410, and the bottom of screw sleeve 411 abuts against the top of rubber sleeve 407 at the top end, and when stud 410 rotates, screw sleeve 411 can realize up / down movement, and when screw sleeve 411 moves down, rubber sleeve 407 and spring 408 at the top end can be pressed, so that each spring 408 overlaps the pressing plate 406 below it;

[0042] After one end of each corrugated cardboard is respectively fed into the space below each receiving plate 204, and the receiving end of each corrugated cardboard is moved to the outer wall of the assembly box 201 by using the abutment plate 303, so that the edges to be cut of each corrugated cardboard are all above the blanking port 103, the motor 1 405 is started to drive the mounting shaft 404 to rotate 90 degrees, so that each pressing plate 406 is driven to rotate 90 degrees and move out from the storage slot 402 to the placement slot 102, so that each pressing plate 406 is pressed on the upper surface of the corrugated cardboard in the space below the corresponding receiving plate 204, and then the electric telescopic rod 202 is started to drive the base plate 203 and the receiving plate 204 to move, so that the receiving plate 204 is moved back and received in the through hole 205, that is, only each pressing plate 406 is placed on the upper surface of the corresponding corrugated cardboard, and the receiving plate 204 is moved out from the upper surface of the corresponding corrugated cardboard;

[0043] After each pressing plate 406 is placed on the upper surface of the corresponding corrugated cardboard, the second motor 409 is started to drive the stud 410 to rotate, so that the screw sleeve 411 moves downward to press the rubber sleeve 407 and the spring 408 at the top to press the pressing plate 406 at the top, and then the pressing plates 406 below are overlapped by each spring 408, and finally each pressing plate 406 can be tightly pressed on the upper surface of the corresponding corrugated cardboard, so that the top and bottom of the edge to be cut of each corrugated cardboard are padded with the pressing plate 406, so as to support the bottom of the edge to be cut of each corrugated cardboard, enhance the strength near the edge to be cut of the corrugated cardboard, and each pressing plate 406 can also press the edge to be cut of each corrugated cardboard to keep it tight;

[0044] See also Figure 1 , Figure 2 and Figure 5, a trimming assembly, which is arranged above the opening end of one side edge of the placement slot 102 near the blanking port 103. The trimming assembly includes a hydraulic telescopic rod 502 and a cutter 503. The hydraulic telescopic rod 502 is arranged above the opening end of one side edge of the placement slot 102 near the blanking port 103 through a stand 501. A cutter 503 is arranged at the telescopic end of the hydraulic telescopic rod 502. The cutter 503 is located above the blanking port 103. When the bottom of each corrugated cardboard to be trimmed is supported by the pressing plate 406 to enhance the strength near the edge to be trimmed of the corrugated cardboard, and the edge to be trimmed of each corrugated cardboard is pressed to keep it tight, the hydraulic telescopic rod 502 is started to drive the cutter 503 to move downward, so that the edge to be trimmed of each corrugated cardboard can be trimmed, thereby realizing the cutting operation of multiple corrugated cardboards at one time;

[0045] Furthermore, since the pressing plate 406 supports the bottom of each corrugated cardboard to be trimmed and presses the edge to be trimmed, it can avoid the phenomenon of edge collapse and deformation near the trimming edge of each corrugated cardboard when trimming multiple corrugated cardboards at one time, thereby ensuring the quality of the trimming of the corrugated cardboard.

[0046] The present invention has been described in detail above. The description of the specific embodiments is only used to help understand the method of the present invention and its core concept. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A corrugated cardboard trimming device, characterized in that: include: A trimming table (101), wherein a placement groove (102) intersecting two opposite side walls is provided on the top of the trimming table (101), and a material drop opening (103) is provided on the bottom wall of an open end of one side of the placement groove (102); An interval layered receiving component, wherein the interval layered receiving component is arranged at an open end of one side of the placement groove (102) close to the blanking opening (103); A pushing component, the pushing component is arranged in the other side opening end of the placement groove (102) opposite to the spaced layered receiving component; A spaced layer pressing assembly, wherein two spaced layer pressing assemblies are provided and are respectively arranged in two opposite side walls of an opening end of one side of the placement groove (102) close to the blanking opening (103); A trimming assembly is arranged above an opening end of one side of the placement groove (102) close to the blanking opening (103).

2. A corrugated cardboard trimming device according to claim 1, characterized in that: The spaced layered receiving component comprises an assembly box (201), the assembly box (201) being arranged at an open end of one side of a placement groove (102) close to a blanking opening (103), two rows of through holes (205) being arranged in a vertical array on a side wall of the assembly box (201) facing the placement groove (102), a plurality of through holes (205) being arranged in each row of the through holes (205), an electric telescopic rod (202) being arranged on an inner side wall of the assembly box (201) facing the through holes (205), a base plate (203) being arranged at a telescopic end of the electric telescopic rod (202), a row of receiving plates (204) being arranged on both sides of the side wall of the base plate (203) facing the placement groove (102), and each row of receiving plates (204) being located in a corresponding row of through holes (205).

3. A corrugated board trimming device according to claim 2, characterized in that: The pushing assembly comprises a card slot (301), wherein two card slots (301) are provided and are respectively arranged in two opposite side walls of the other side opening end of the placement slot (102) facing the assembly box (201), and a stabilizing column (302) is arranged in each of the two card slots (301), and a resist plate (303) is sleeved between the two stabilizing columns (302), and a compression spring (304) is arranged between the side wall of the resist plate (303) facing away from the assembly box (201) and the slot wall of the card slot (301); a card hole (305) is arranged on the side wall of the placement slot (102) above the card slot (301), and a latch (306) is inserted into the card hole (305).

4. A corrugated board trimming device according to claim 2, characterized in that: The interval layered pressing assembly comprises an installation groove (401), a receiving groove (402), a mounting frame (403) and a pressing assembly. The installation groove (401) is vertically arranged in a side wall of an opening end of the placement groove (102) close to the blanking opening (103). A plurality of the receiving grooves (402) are provided, and the number is the same as the number of each receiving plate (204) in each column of receiving plates (204). The receiving grooves (402) are arranged in an array along the vertical direction in a side wall of an opening end of the placement groove (102) close to the blanking opening (103). One end of each receiving groove (402) is connected to the installation groove (401). A mounting shaft (404) is rotatably arranged in the installation groove (401), and a motor (405) is arranged at the bottom of the installation shaft (404). ), a plurality of pressing plates (406) are arrayed on the prismatic portion of the installation shaft (404), the number of the pressing plates (406) being the same as the number of the receiving grooves (402) on the side wall corresponding to the placement groove (102), and a rubber sleeve (407) is provided on the upper and lower surfaces of each pressing plate (406) and the installation shaft (404), and each pressing plate (406) on the installation shaft (404) is respectively located on the lower surface of each receiving plate (204) in the corresponding column of receiving plates (204), and corresponds to the position of each receiving groove (402) on the side wall corresponding to the placement groove (102), the installation frame (403) is arranged at the top of the installation groove (401), and the clamping assembly is arranged on the installation frame (403) and the installation shaft (404).

5. A corrugated board trimming device according to claim 4, characterized in that: The clamping assembly comprises a spring (408), a second motor (409), a stud (410) and a screw sleeve (411). A plurality of springs (408) are provided, and the number of the springs (408) is the same as the number of the rubber sleeves (407). Each spring (408) is located in a corresponding rubber sleeve (407). The second motor (409) and the stud (410) are both provided on a mounting frame (403). The top of the stud (410) is connected to the driving shaft of the second motor (409). The bottom of the stud (410) is rotatably sleeved with the top of the mounting shaft (404). The screw sleeve (411) is screwed onto the stud (410). The bottom of the screw sleeve (411) is in contact with the top of the rubber sleeve (407) at the top.

6. The corrugated board trimming device according to claim 1, characterized in that: The trimming assembly comprises a hydraulic telescopic rod (502) and a cutter (503); the hydraulic telescopic rod (502) is arranged above an opening end of a side edge of the placement slot (102) close to a blanking opening (103) through a stand (501); the cutter (503) is arranged at the telescopic end of the hydraulic telescopic rod (502); and the cutter (503) is located above the blanking opening (103).

7. A corrugated board trimming device according to claim 2, characterized in that: The length of each receiving plate (204) in each row of receiving plates (204) gradually increases from top to bottom.

Images