Automatic conveying and counting machine for laundry condensate beads
By combining the design of unloading hopper, conveying mechanism and material distribution components, along with screening brush roller and feeding roller, the problems of low efficiency and inaccurate counting in the production of laundry detergent pods are solved, and efficient material distribution and counting are achieved.
Patent Information
- Application Number
- CN202423264401.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the current production process of laundry detergent pods, the traditional conveying and counting methods are inefficient, have low accuracy, and are prone to particle accumulation, affecting the accuracy of counting.
It adopts a combined design of unloading hopper, conveying mechanism, counting hopper and material distribution component, combined with screening brush roller and feeding roller, to realize the individual conveying and counting of laundry detergent pods through material distribution channel and screening process.
It improves the dispensing effect of laundry detergent pods, reduces granule accumulation, and ensures the accuracy and efficiency of counting.
Smart Images
Figure CN223521102U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of automatic equipment, in particular to a laundry bead automatic conveying and counting machine. BACKGROUND
[0002] At present, in the production process of laundry beads, the traditional manual or semi-automatic conveying and counting mode has the problems of low efficiency, low precision and high labor intensity. The market demands for high-efficiency and precise automatic production equipment is increasing. Although the existing automatic equipment improves the production efficiency to a certain extent.
[0003] In the related art, the laundry beads particles after cutting and segmentation fall into the discharge hopper, the discharge hopper discharges the laundry beads to the conveying mechanism, the conveying mechanism sends the laundry beads to the separate compartments of the counting hopper, each separate compartment of the counting hopper is provided with a dynamic scanning sensor, which scans the laundry beads particles in the falling process by using the principle of photoelectric effect, and the dynamic scanning sensor inputs the generated working signal to the processor, thereby realizing the counting function. However, in actual production process, in order to increase the counting efficiency, multiple separate compartments are arranged at the counting hopper, and the discharge capacity of the discharge hopper is also increased. However, during the conveying process of the conveying mechanism, the laundry beads particles are stacked, so it is difficult to send the laundry beads to the separate compartments of the counting hopper one by one, and finally the accuracy of counting is affected, so there is still room for improvement. SUMMARY
[0004] In order to improve the problem of stacking of laundry beads particles during conveying, the present application provides a laundry bead automatic conveying and counting machine.
[0005] The laundry bead automatic conveying and counting machine provided by the present application adopts the following technical scheme:
[0006] A laundry bead automatic conveying and counting machine, comprising a rack, a discharge hopper, a conveying mechanism, a counting hopper and a material distribution assembly arranged on the rack, wherein the lower part of the discharge hopper is provided with a discharge port, the starting end of the conveying mechanism is below the discharge port, the counting hopper is located below the end of the conveying mechanism, and the material distribution assembly is located on the conveying surface of the conveying mechanism. The material distribution assembly is provided with a plurality of material distribution channels distributed along the width direction of the conveying mechanism, and the material distribution channels are used for passing laundry beads particles; the rack is rotatably connected with a screening brush roller, the rotation axis direction of the screening brush roller extends along the width direction of the conveying mechanism, the gap between the screening brush roller and the conveying surface of the conveying mechanism is used for passing laundry beads particles, and the screening brush roller is used for screening the stacked laundry beads particles.
[0007] By adopting the above technical scheme, the material distribution assembly and the screening brush roller are arranged on the conveying mechanism. When the plurality of laundry condensing beads are discharged through the discharge opening of the discharge hopper, the conveying mechanism receives the laundry condensing beads, and then feeds the laundry condensing beads to the counting hopper. The laundry condensing beads pass through the material distribution assembly during the conveying process, so that the plurality of laundry condensing beads pass through different material distribution channels, achieving the purpose of distributing the stacked laundry condensing beads. Then, the laundry condensing beads pass through the screening brush roller, and the screening brush roller screens the two or three stacked laundry condensing bead particles, further achieving the purpose of distributing the laundry condensing beads, which is beneficial to improve the problem of accumulation of laundry condensing bead particles during conveying, so as to conveniently send the laundry condensing beads to the separate compartments of the counting hopper one by one, and further improve the accuracy of counting of the counting hopper.
[0008] Preferably, the lower feeding roller is rotationally connected to the bottom of the discharge hopper, the inner bottom wall of the discharge hopper extends downwardly and obliquely to the outer peripheral surface of the lower feeding roller, the lower feeding roller is close to the discharge opening, a plurality of first clamping grooves are arranged on the surface of the lower feeding roller and extend along the axial direction of the lower feeding roller, and the discharge hopper is provided with a lower feeding driving member for driving the rotation of the lower feeding roller.
[0009] By adopting the above technical scheme, the laundry condensing beads falling into the discharge hopper slide to the lower feeding roller under the oblique guiding action of the inner bottom wall of the discharge hopper. The edges of the laundry condensing beads are temporarily clamped in the first clamping grooves of the lower feeding roller. Then, under the driving of the lower feeding driving member, the laundry condensing beads are conveyed one by one to the discharge opening, which makes preparation for the subsequent distribution step, is beneficial to smoothly distribute the irregularly distributed laundry condensing beads, and further improves the distribution effect.
[0010] Preferably, the upper feeding roller is rotationally connected to the bottom of the discharge hopper, the discharge hopper is provided with an upper feeding driving member for driving the rotation of the upper feeding roller, the upper feeding roller is arranged in the discharge opening and located above the lower feeding roller, a discharge gap is formed between the lower feeding roller and the upper feeding roller for the laundry condensing bead particles to pass through, and a plurality of second clamping grooves are arranged on the surface of the upper feeding roller and extend along the axial direction of the upper feeding roller.
[0011] By adopting the above technical scheme, the upper and lower feeding rollers distributed in an up-down staggered manner improve the receiving range of the laundry condensing beads at the bottom of the discharge hopper, so that the laundry condensing beads smoothly fall into the discharge opening in the discharge hopper. Under the common driving of the upper feeding driving member and the lower feeding driving member, the laundry condensing beads smoothly pass through the discharge gap between the lower feeding roller and the upper feeding roller, which is beneficial to achieve the purpose of orderly discharging of the discharge hopper.
[0012] Preferably, the inner bottom wall of the discharge hopper is provided with a plurality of partitions above the lower feeding roller, the plurality of partitions are distributed along the axial direction of the lower feeding roller, and the end of the partition away from the inner bottom wall of the discharge hopper extends to the outer surface of the upper feeding roller. The upper feeding roller, the lower feeding roller and the plurality of partitions jointly form a plurality of compartments.
[0013] By adopting the above technical scheme, the inner bottom wall of the discharge hopper is provided with a plurality of partitions above the lower feeding roller, and the upper feeding roller, the lower feeding roller and the plurality of partitions jointly form a plurality of compartments, so that the discharge hopper can be preliminarily separated inside, which is beneficial to realize the purpose of orderly discharging of the discharge hopper.
[0014] Preferably, the conveying mechanism comprises a first conveying belt and a second conveying belt, the first conveying belt and the second conveying belt are distributed in steps, the starting end of the first conveying belt is located below the discharge port, the starting end of the second conveying belt is located below the end of the first conveying belt, and the counting hopper is located below the end of the second conveying belt.
[0015] By adopting the above technical scheme, the first conveying belt and the second conveying belt are distributed in steps, so that the laundry beads fall a short distance during conveying, which is beneficial to separate the laundry beads adhered together.
[0016] Preferably, the number of the material distribution assemblies is not less than two, the two material distribution assemblies are arranged on the conveying surface of the first conveying belt and the conveying surface of the second conveying belt, and the sieve brush roller is located on the conveying surface of the first conveying belt and behind the material distribution assembly.
[0017] By adopting the above technical scheme, the laundry beads successively pass through the primary material distribution process of the material distribution assembly, the rolling and sieving process of the sieve brush roller, the short distance falling process of the conveying mechanism and the secondary material distribution process of the material distribution assembly, which is beneficial to improve the material distribution effect of the equipment.
[0018] Preferably, the material distribution assembly comprises a support frame which spans above the conveying mechanism and a plurality of material distribution plates arranged at the support frame, and the plurality of material distribution plates are distributed along the width direction of the conveying mechanism.
[0019] By adopting the above technical scheme, the material distribution channel of the material distribution assembly is formed by the adjacent material distribution plates, so that the laundry beads can smoothly pass through the material distribution channel under the guidance of the partitions.
[0020] Preferably, the material distribution plate comprises two right-angled triangular plate units, the hypotenuses of the two right-angled triangular plate units are spliced with each other and extend downwardly and obliquely toward the starting end of the conveying mechanism, and the two right-angled triangular plate units are arranged in an inverted V shape.
[0021] By adopting the technical scheme, the oblique sides of the two right-angled triangular plate units are mutually spliced and extend downward in the direction of the starting end of the conveying mechanism, so that the laundry beads adhered together can be split under the guidance of the two right-angled triangular plate units, the two right-angled triangular plate units are arranged in an inverted V shape, so that the two sides of the material distribution plate have a certain slope, the laundry beads falling through the discharge port are distributed, and the material distribution effect of the material distribution assembly is improved.
[0022] To sum up, the present application has at least one of the following beneficial technical effects:
[0023] 1. By arranging the material distribution assembly and the screening brush roller on the conveying mechanism, when the plurality of laundry beads are discharged through the discharge port of the discharge hopper, the conveying mechanism receives the laundry beads and then feeds them to the counting hopper, the laundry beads pass through the material distribution assembly during the conveying process, so that the plurality of laundry beads are guided to different material distribution channels, achieving the purpose of distributing the laundry beads, and then the laundry beads pass through the screening brush roller, the screening brush roller screens the two or three stacked laundry beads, further achieving the purpose of distributing the laundry beads, and improving the problem of laundry bead accumulation during conveying;
[0024] 2. A plurality of partitions are arranged above the upper feeding roller on the inner bottom wall of the discharge hopper, the upper feeding roller, the lower feeding roller and the plurality of partitions together form a plurality of material distribution bins, so that the discharge hopper can be preliminarily separated, and the purpose of orderly discharging of the discharge hopper is achieved;
[0025] 3. The laundry beads pass through the primary distribution process of the material distribution assembly, the rolling screening process of the screening brush roller, the short distance falling process of the conveying mechanism and the secondary distribution process of the material distribution assembly, which improves the distribution effect of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a structure schematic diagram of a laundry bead automatic conveying particle machine according to an embodiment of the present application.
[0027] Figure 2 is Figure 1 is an enlarged schematic diagram of position A in FIG. 4.
[0028] Figure 3 is a structure schematic diagram of a material distribution assembly in a laundry bead automatic conveying particle machine according to an embodiment of the present application.
[0029] Figure 4 is a structure schematic diagram of a material distribution assembly in a laundry bead automatic conveying particle machine according to an embodiment of the present application.
[0030] Explanation of reference signs: 1, rack; 2, discharge hopper; 21, discharge port; 22, discharge gap; 23, partition; 24, compartment; 3, conveying mechanism; 31, first conveying belt; 32, second conveying belt; 4, distribution assembly; 41, support frame; 42, distribution plate; 43, distribution channel; 421, right-angled triangular plate unit; 5, counting hopper; 6, screening brush roller; 7, upper feeding roller; 71, second clamping groove; 72, upper feeding driving member; 8, lower feeding roller; 81, first clamping groove; 82, lower feeding driving member. DETAILED DESCRIPTION
[0031] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.
[0032] The present application discloses a kind of laundry condensing bead automatic conveying machine, refer to Figure 1 And Figure 2 , including rack 1 and the discharge hopper 2, conveying mechanism 3, counting hopper 5 and distribution assembly 4 installed on rack 1.Discharge hopper 2 is installed on the top surface of rack 1, and the lower part of the front end surface of discharge hopper 2 is provided with discharge port 21, conveying mechanism 3 is conveyed along horizontal longitudinal direction, wherein the starting end of conveying mechanism 3 is located below discharge port 21, for receiving laundry condensing bead particles falling from discharge port 21, counting hopper 5 is located below the end of conveying mechanism 3, conveying mechanism 3 sends laundry condensing bead to the compartment of counting hopper 5, each compartment of counting hopper 5 is provided with dynamic scanning sensor, which scans laundry condensing bead particles in the falling process by using the principle of photoelectric effect, and the generated working signal is input into the processor, so as to realize counting function.
[0033] In the embodiment, distribution assembly 4 is located on the conveying surface of conveying mechanism 3, and distribution assembly 4 is provided with a plurality of distribution channels 43 distributed along the width direction of conveying mechanism 3, wherein the width direction of conveying mechanism 3 is transverse, and distribution channels 43 can be passed through by laundry condensing bead particles, so as to realize the distribution purpose of laundry condensing bead pile.Rack 1 is rotatably connected with screening brush roller 6, and the rotary axis direction of screening brush roller 6 extends along the width direction of conveying mechanism 3.The gap between screening brush roller 6 and the conveying surface of conveying mechanism 3 can be passed through by laundry condensing bead particles, and screening brush roller 6 is used for screening laundry condensing bead particles, so as to further realize the distribution purpose of laundry condensing bead, which is beneficial to improve the problem of laundry condensing bead particle accumulation in the conveying process, so as to facilitate feeding laundry condensing bead one by one into the compartment of counting hopper 5, and further improve the accuracy of counting of counting hopper 5.
[0034] Refer to Figure 2 And Figure 3In the embodiment, the bottom of the discharge hopper 2 is rotatably connected with the lower feeding roller 8, and the rotary shaft of the lower feeding roller 8 is transversely arranged. The inner bottom wall of the discharge hopper 2 extends downwardly and obliquely to the outer peripheral surface of the lower feeding roller 8, so that the laundry condensate beads falling into the discharge hopper 2 slide to the lower feeding roller 8 under the oblique guiding action of the inner bottom wall of the discharge hopper 2. In addition, the lower feeding roller 8 is close to the discharge port 21, and a plurality of first clamping grooves 81 are arranged on the surface of the lower feeding roller 8 in a circumferential direction and extend along the axial direction of the lower feeding roller 8, so that the edges of the sliding laundry condensate beads can be temporarily clamped in the first clamping grooves 81 of the lower feeding roller 8. The outer side of the discharge hopper 2 is provided with a lower feeding driving member 82 for driving the lower feeding roller 8 to rotate. Under the driving of the lower feeding driving member 82, the laundry condensate beads are sequentially conveyed to the direction of the discharge port 21, which makes preparation for the subsequent distribution step, and is beneficial to smoothly distribute the irregularly distributed laundry condensate beads, thereby improving the distribution effect.
[0035] In the embodiment, the bottom of the discharge hopper 2 is rotatably connected with the lower feeding roller 8, and the rotary shaft of the lower feeding roller 8 is transversely arranged. The inner bottom wall of the discharge hopper 2 extends downwardly and obliquely to the outer peripheral surface of the lower feeding roller 8, so that the laundry condensate beads falling into the discharge hopper 2 slide to the lower feeding roller 8 under the oblique guiding action of the inner bottom wall of the discharge hopper 2. In addition, the lower feeding roller 8 is close to the discharge port 21, and a plurality of first clamping grooves 81 are arranged on the surface of the lower feeding roller 8 in a circumferential direction and extend along the axial direction of the lower feeding roller 8, so that the edges of the sliding laundry condensate beads can be temporarily clamped in the first clamping grooves 81 of the lower feeding roller 8. The outer side of the discharge hopper 2 is provided with a lower feeding driving member 82 for driving the lower feeding roller 8 to rotate. Under the driving of the lower feeding driving member 82, the laundry condensate beads are sequentially conveyed to the direction of the discharge port 21, which makes preparation for the subsequent distribution step, and is beneficial to smoothly distribute the irregularly distributed laundry condensate beads, thereby improving the distribution effect.
[0036] In the embodiment, the inner bottom wall of the discharge hopper 2 is fixed with a plurality of partitions 23 above the lower feeding roller 8, and the plurality of partitions 23 are arranged in an equal interval along the axial direction of the lower feeding roller 8. The end of the partition 23 away from the inner bottom wall of the discharge hopper 2 extends to the outer surface of the upper feeding roller 7. The upper feeding roller 7, the lower feeding roller 8 and the plurality of partitions 23 jointly form a plurality of compartments 24, so that the inside of the discharge hopper 2 can be preliminarily separated, which is beneficial to realize the purpose of orderly discharging of the discharge hopper 2. The outer peripheral surface of the upper feeding roller 7 is provided with a plurality of annular protrusions arranged in an axial direction of the upper feeding roller 7. The end of the partition 23 away from the inner bottom wall of the discharge hopper 2 extends to the protrusion of the upper feeding roller 7. The arrangement of the protrusion can divide the discharge gap 22 into a plurality of channels, so as to further improve the separation effect of the laundry condensate beads.
[0037] In the embodiment, the conveying mechanism 3 comprises a first conveying belt 31 and a second conveying belt 32, the first conveying belt 31 and the second conveying belt 32 are arranged in a stepped manner, the starting end of the first conveying belt 31 is located below the discharge port 21, the starting end of the second conveying belt 32 is located below the end of the first conveying belt 31, and the counting hopper 5 is located below the end of the second conveying belt 32, so that the laundry beads fall a short distance during conveying, which is beneficial to separate the laundry beads adhered together.
[0038] In the embodiment, the material distribution assembly 4 is not less than two, and the two material distribution assemblies 4 are arranged on the conveying surface of the first conveying belt 31 and the conveying surface of the second conveying belt 32. The screening and brushing roller 6 is located on the conveying surface of the first conveying belt 31 and behind the material distribution assembly 4. Among them, the separation assembly of the first conveying belt 31 is located at the falling point of the discharge port 21, which is beneficial to separate the laundry beads at the first time. The separation assembly of the second conveying belt 32 is close to the end of the first conveying belt 31, so that the laundry beads are separated at the position of short distance falling, which is beneficial to further improve the separation effect. The laundry beads successively pass through the primary separation process of the material distribution assembly 4, the rolling and screening process of the screening and brushing roller 6, the short distance falling process of the conveying mechanism 3, and the secondary separation process of the material distribution assembly 4, which is beneficial to improve the separation effect of the equipment.
[0039] Referring to Figure 2 and Figure 4 In the embodiment, the material distribution assembly 4 specifically comprises a support frame 41 which is transversely arranged above the conveying mechanism 3 and a plurality of separation plates 42 which are installed on the support frame 41, and the support frame 41 is installed on the rack 1. The plurality of separation plates 42 are arranged at intervals along the width direction of the conveying mechanism 3, and the separation channel 43 of the material distribution assembly 4 is formed by the adjacent separation plates 42. The separation plate 42 comprises two right-angled triangular plate units 421, the oblique sides of the two right-angled triangular plate units 421 are spliced with each other and extend downwardly and obliquely toward the starting end of the conveying mechanism 3, the two right-angled triangular plate units 421 are arranged in an inverted V shape, so that the laundry beads adhered together can be separated under the guidance of the two right-angled triangular plate units 421, and the two right-angled triangular plate units 421 are arranged in an inverted V shape, so that the separation plate 42 has a certain slope on both sides, which has a separation effect on the laundry beads falling from the discharge port 21, and is beneficial to improve the separation effect of the material distribution assembly 4.
[0040] The implementation principle of the laundry condensation bead automatic conveying particle machine is as follows: when a plurality of laundry condensation beads are discharged through the discharge port 21 of the discharge hopper 2, the first conveying belt 31 receives the laundry condensation beads, and the first conveying belt 31 is provided with a material distribution assembly 4 for distributing the plurality of laundry condensation beads. Then, the laundry condensation beads are subjected to a screening process by the screening brush roller 6, which screens and separates two or three layers of laundry condensation beads, thereby achieving the purpose of distributing the laundry condensation beads and improving the problem of accumulation of the laundry condensation beads during the conveying process. Then, the laundry condensation beads fall to the material distribution assembly 4 at a position where the first conveying belt 31 and the second conveying belt 32 fall a short distance, thereby further achieving the purpose of distribution. Finally, the laundry condensation beads are sent to the counting hopper 5 one by one for counting, thereby improving the problem of accumulation of the laundry condensation beads during the conveying process, so as to facilitate the sending of the laundry condensation beads one by one to the chamber of the counting hopper 5, and thereby improving the accuracy of counting by the counting hopper 5.
[0041] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A laundry condensation bead automatic conveying number of particles machine, characterized in that: The device comprises a frame (1), a discharge hopper (2), a conveying mechanism (3), a counting hopper (5) and a distribution assembly (4) arranged on the frame (1), the discharge hopper (2) is provided with a discharge opening (21) at the lower part, the starting end of the conveying mechanism (3) is below the discharge opening (21), the counting hopper (5) is below the end of the conveying mechanism (3), and the distribution assembly (4) is on the conveying surface of the conveying mechanism (3), the distribution assembly (4) is provided with a plurality of distribution channels (43) distributed along the width direction of the conveying mechanism (3), and the distribution channels (43) are used for passing laundry beads; the frame (1) is rotationally connected with a screening brush roller (6), the rotation axis direction of the screening brush roller (6) extends along the width direction of the conveying mechanism (3), the gap between the screening brush roller (6) and the conveying surface of the conveying mechanism (3) can pass laundry beads, and the screening brush roller (6) is used for screening the stacked laundry beads.
2. The laundry nugget automatic conveying pelletizer according to claim 1, wherein: The bottom of the discharge hopper (2) is rotationally connected with a lower feeding roller (8), the inner bottom wall of the discharge hopper (2) extends downward and downward to the outer surface of the lower feeding roller (8), the lower feeding roller (8) is close to the discharge opening (21), the surface of the lower feeding roller (8) is provided with a plurality of first clamping grooves (81) distributed in the circumferential direction, the first clamping grooves (81) extend along the axial direction of the lower feeding roller (8), and the discharge hopper (2) is provided with a lower feeding driving element (82) used for driving the lower feeding roller (8) to rotate.
3. The laundry nugget automatic conveying pelletizer according to claim 2, characterized in that: The bottom of the discharge hopper (2) is rotationally connected with an upper feeding roller (7), the discharge hopper (2) is provided with an upper feeding driving element (72) used for driving the upper feeding roller (7) to rotate, the upper feeding roller (7) is arranged in the discharge opening (21) and above the lower feeding roller (8), a discharge gap (22) for passing laundry beads is formed between the lower feeding roller (8) and the upper feeding roller (7), and the surface of the upper feeding roller (7) is provided with a plurality of second clamping grooves (71) distributed in the circumferential direction, the second clamping grooves (71) extend along the axial direction of the upper feeding roller (7).
4. The laundry nugget automatic conveying pelletizer according to claim 3, wherein: The inner bottom wall of the discharge hopper (2) is provided with a plurality of partitions (23) above the lower feeding roller (8), the plurality of partitions (23) are spaced apart along the axial direction of the lower feeding roller (8), one end of the partition (23) away from the inner bottom wall of the discharge hopper (2) extends to the outer surface of the upper feeding roller (7), and the upper feeding roller (7), the lower feeding roller (8) and the plurality of partitions (23) jointly form a plurality of compartments (24).
5. The laundry nugget automatic conveying pelletizer according to claim 1, wherein: The conveying mechanism (3) comprises a first conveying belt (31) and a second conveying belt (32), the first conveying belt (31) and the second conveying belt (32) are arranged in a stepped manner, the starting end of the first conveying belt (31) is below the discharge opening (21), the starting end of the second conveying belt (32) is below the end of the first conveying belt (31), and the counting hopper (5) is below the end of the second conveying belt (32).
6. The laundry nugget automatic conveying pelletizer according to claim 5, wherein: The number of the distribution assemblies (4) is not less than two, two distribution assemblies (4) are arranged on the conveying surface of the first conveying belt (31) and the conveying surface of the second conveying belt (32), and the screening brush roller (6) is located on the conveying surface of the first conveying belt (31) and behind the distribution assembly (4).
7. The laundry nugget automatic conveying pelletizer according to claim 1, wherein: The distribution assembly (4) comprises a support frame (41) which is transversely arranged above the conveying mechanism (3) and a plurality of distribution plates (42) which are arranged on the support frame (41) and are distributed along the width direction of the conveying mechanism (3).
8. The laundry nugget automatic conveying pelletizer according to claim 7, characterized in that: The distribution plate (42) comprises two right-angled triangle plate units (421), the hypotenuses of the two right-angled triangle plate units (421) are combined with each other and extend downwardly and obliquely toward the starting end of the conveying mechanism (3), and the two right-angled triangle plate units (421) are arranged in an inverted V shape.