Answer sheet counting machine with high accuracy

Abstract

The invention relates to the technical field of answer sheet counting machines, and particularly discloses an answer sheet counting machine with high accuracy, which comprises two conveying racks and a conveying mechanism, the conveying mechanism is arranged between the two conveying racks, and the conveying mechanism is used for conveying answer sheets; the pressing mechanism is arranged at the top of the conveying frame, and the pressing mechanism is used for placing and pressing the answer sheet; the conveying mechanism is arranged, so that the answer sheets can be conveyed and moved gradually, and the answer sheets can be scanned and counted conveniently; by arranging the pressing mechanism and the progressive mechanism, the progressive mechanism can be driven under the condition that the conveying mechanism is controlled to operate, so that the progressive mechanism gradually descends to move and is matched with the pressing mechanism, the answer sheets can be progressively pressed one by one, and the phenomenon that the positions of the answer sheets are loosened when the answer sheets are conveyed one by one is prevented; therefore, a large number of answer sheets can be gathered together.

Description

Technical Field

[0001] The invention relates to the technical field of answer sheet counting machines, in particular to an answer sheet counting machine with high accuracy. Background Art

[0002] The current answer sheet counting machine is a machine used to count the number of answer sheets. Its working principle when in use is to adopt advanced photoelectric sensor technology. The photoelectric sensor detects the passage of the answer sheet. When each answer sheet passes through the optical sensor, the optical sensor will send a signal in time and then count it, so that the answer sheet is scanned and counted.

[0003] However, the existing answer sheet counting machine uses a conveying wheel to rotate to drive the answer sheets to move, and before conveying, multiple answer sheets are put together for conveying and counting. However, this conveying method will cause the answer sheets to stick together, causing two or more answer sheets to be taken away and counted at the same time, making it impossible for the answer sheets attached to the bottom to be accurately scanned, thereby causing the scanning accuracy to decrease and affecting the final scanning detection results.

[0004] To this end, we propose an answer sheet counting machine with high accuracy. Summary of the invention

[0005] The object of the present invention is to provide an answer sheet counting machine with high accuracy to solve the problem raised in the above background technology that the existing answer sheet counting machine rotates the conveying wheel to drive the answer sheets to move during use, and puts a plurality of answer sheets together for conveying and counting before conveying. However, such a conveying method may cause the answer sheets to stick together, resulting in two or more answer sheets being taken away and counted at the same time, making it impossible for the answer sheets attached to the bottom to be accurately scanned, thereby causing the scanning accuracy to decrease and affecting the final scanning detection result.

[0006] To achieve the above object, the present invention provides the following technical solution: a highly accurate answer sheet counting machine, comprising: a conveyor frame

[0007] A conveying mechanism, which is arranged between the two conveying racks and is used to convey the answer sheet;

[0008] A clamping mechanism, which is arranged on the top of the conveying frame and is used to place and clamp the answer sheet;

[0009] A progressive mechanism, which is arranged on one side of the conveying frame and the pressing mechanism, and is used to move downwards progressively to press the answer sheet;

[0010] A decompression mechanism, which is arranged inside the conveying mechanism and is used to stop adsorbing the answer sheet and change the position of the answer sheet;

[0011] The negative pressure mechanism is arranged on one side of the conveying mechanism, and is used to create a negative pressure environment inside the conveying mechanism.

[0012] The conveying mechanism includes a conveying roller rotatably connected between two conveying frames, a hollow conveying belt is arranged on the outside of the conveying roller, a motor is fixedly connected to one side of one of the conveying frames, and the output end of the motor is fixedly connected to one of the conveying rollers.

[0013] Among them, the clamping mechanism includes a first support plate fixedly connected to one side of the conveying frame, two first limit rods are fixedly connected to the top of the two first support plates, an answer sheet placement plate is fixedly connected to the outer sides of the four first limit rods, a first spring is fixedly connected to the top of the answer sheet placement plate and located on the outer side of the first limit rod, a clamping plate is fixedly connected to the top of the first spring and located on the outer side of the first limit rod, and the clamping plate is slidably connected to the first limit rod.

[0014] Among them, the progressive mechanism includes a fixed rod fixedly connected to the top of the clamping plate, the top of the fixed rod is rotatably connected to a flip positioning rod, a torsion spring is sleeved on the outside of the fixed rod and located between the flip positioning rod and the clamping plate, and one end of the torsion spring is fixedly connected to the flip positioning rod, and the end of the torsion spring away from the flip positioning rod is fixedly connected to the clamping plate, the top of the first support plate and located inside the clamping plate is fixedly connected with an advancement rod, and a plurality of advancement grooves matching the advancement rod are equidistantly provided inside the advancement rod, a large gear is rotatably connected to one side of the conveying frame, and a side of the large gear away from the conveying frame is connected to a pushing plate through a first bolt, and a small gear is meshingly connected to one side of the large gear, and the small gear is fixedly connected to one side of one of the conveying rollers.

[0015] Among them, the decompression mechanism includes a plurality of negative pressure heads fixedly connected to the interior of the hollow conveyor belt, a limiting shaft fixedly connected to the interior of the hollow conveyor belt and below the negative pressure head, a ramp plate fixedly connected to the outside of the limiting shaft, a sealing block at the top of the ramp plate and at a fixed distance below the negative pressure head, a second spring sleeved on the outside of the limiting shaft and above the ramp plate, an elliptical block slidingly connected to the interior of the hollow conveyor belt and on both sides of the ramp plate, a third spring is arranged on the outside of the elliptical block and on the outside of the hollow conveyor belt, a pushing inclined block is fixedly connected to one side of the elliptical block and located in the interior of the hollow conveyor belt, two second limiting rods are slidingly connected to the inside of the pushing inclined block, the two second limiting rods are fixedly connected to the hollow conveyor belt, a micro negative pressure detector is fixedly connected to the interior of the hollow conveyor belt and on one side of the ramp plate, and multiple detection tubes are fixedly connected between one side of the micro negative pressure detector and one side of the negative pressure head.

[0016] Among them, the negative pressure mechanism includes two protective covers fixedly connected to one side of the hollow conveyor belt, a micro negative pressure pump is fixedly connected inside the protective cover, a disassembled filter box is connected inside the protective cover through a second bolt, and multiple filters are equidistantly fixedly connected inside the disassembled filter box.

[0017] Among them, two contact blocks are fixedly connected to the top of the conveying frame, a contact plate is fixedly connected to the top of the conveying frame and below the clamping mechanism, and an optical sensor is fixedly connected to the top of the conveying frame.

[0018] Among them, the spacing distance of the progressive grooves is 0.1mm-0.5mm.

[0019] Among them, it also includes a storage mechanism, which is arranged on one side of the conveying frame and is used to store answer sheets that have completed the scanning work. The storage mechanism includes a fixed plate fixedly connected to one side of the conveying frame, a guide plate is fixedly connected to the top of the two fixed plates, a guide groove is opened inside the guide plate, a fixed box is fixedly connected between the two fixed plates and below the guide plate, a collecting box is arranged inside the fixed box, a lifting plate is slidably connected to the inner wall of the collecting box, and four fourth springs are fixedly connected to the bottom of the lifting plate.

[0020] Among them, the guide plate is set to an inclined angle of degrees, and the inner wall of the guide groove is smoothed.

[0021] The present invention has at least the following beneficial effects:

[0022] A conveying mechanism is provided to gradually convey and move the answer sheets, so as to facilitate scanning and counting of the answer sheets; by providing a pressing mechanism and a progressive mechanism, the progressive mechanism can be driven when the conveying mechanism is controlled to move downward gradually and cooperate with the pressing mechanism, so that the answer sheets can be progressively pressed one by one to prevent the answer sheets from loosening when they are conveyed one by one, so as to keep a large number of answer sheets together; by providing a negative pressure mechanism, the answer sheets can be adsorbed and moved one by one, and by adopting adsorption to prevent the answer sheets from being driven, the method of conveying multiple answer sheets at the same time can be effectively avoided, so that the bottom answer sheet can be adsorbed and moved one by one, so as to realize scanning and counting of the answer sheets one by one, thereby improving the scanning accuracy and ensuring The final scanning result is hindered, and by providing a negative pressure detection function in the structure of the decompression mechanism, it is possible to timely understand whether the folded answer sheet is adsorbed, and by detecting the negative pressure inside the negative pressure head, it is possible to understand whether the adsorption of the answer sheet is completed. When adsorbing the answer sheet, three negative pressure heads are used to perform the adsorption work, a total of nine negative pressure heads are used to ensure that the front end of the answer sheet is adsorbed first, and then the middle end of the answer sheet is adsorbed, and the last step is to adsorb the answer sheet at the tail end. By providing a decompression mechanism, after the conveying mechanism moves the answer sheet to the desired position and completely completes the scanning and counting work, the negative pressure mechanism can be controlled to stop the adsorption work one by one, so that the scanned answer sheets can be collected and processed, thereby reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a rear view schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of part of the present invention;

[0026] Figure 4 It is a front view structural schematic diagram of the clamping mechanism and the progressive mechanism of the present invention;

[0027] Figure 5 It is a rear view structural schematic diagram of the clamping mechanism and the progressive mechanism of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the progressive rod of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the decompression mechanism and the negative pressure mechanism of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the decompression mechanism of the present invention;

[0031] Fig. 9 The present invention is Figure 8 A is an enlarged structural diagram;

[0032] Fig.10 Schematic diagram of the internal structure of the negative pressure mechanism of the present invention;

[0033] Fig.11 It is a schematic diagram of the internal structure of the storage mechanism of the present invention;

[0034] Fig.12 It is a structural schematic diagram of the collection box of the present invention;

[0035] Fig.13 It is a schematic diagram of the structure of the touch panel of the present invention;

[0036] Fig.14 It is a schematic structural diagram of the touch block of the present invention.

[0037] In the figure: 1, conveying frame; 2, conveying mechanism; 21, motor; 22, conveying roller; 23, hollow conveyor belt; 3, clamping mechanism; 31, first support plate; 32, first limit rod; 33, answer sheet placement plate; 34, first spring; 35, clamping plate; 4, progressive mechanism; 41, large gear; 42, push plate; 43, fixed rod; 44, small gear; 45, flip positioning rod; 46, torsion spring; 47, progressive rod; 48, progressive groove; 5, decompression mechanism; 51, limit shaft; 52, ramp plate; 53, air sealing block; 54, The second spring; 55, push the inclined block; 56, the second limit rod; 57, the elliptical block; 58, the third spring; 59, the negative pressure head; 590, the micro negative pressure detector; 591, the multi-head detection tube; 6, the negative pressure mechanism; 61, the protective cover; 62, the micro negative pressure pump; 63, the removal of the filter box; 64, the filter; 7, the storage mechanism; 71, the fixing plate; 72, the guide plate; 73, the guide groove; 74, the fixing box; 75, the collecting box; 76, the fourth spring; 77, the lifting plate; 8, the touch plate; 9, the touch block; 10, the optical sensor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1

[0040] See also Figures 1 to 14 The present invention provides a technical solution: a high-accuracy answer sheet counting machine, comprising: a conveyor frame 1

[0041] A conveying mechanism 2, which is arranged between two conveying frames 1 and is used to convey answer sheets;

[0042] A clamping mechanism 3, which is arranged on the top of the conveying frame 1, and is used to place and clamp the answer sheet;

[0043] The progressive mechanism 4 is arranged on one side of the conveying frame 1 and the pressing mechanism 3, and the progressive mechanism 4 is used to move downward in a progressive manner to press the answer;

[0044] A decompression mechanism 5, which is arranged inside the conveying mechanism 2, and is used to stop adsorbing the answer sheet and change the position of the answer sheet;

[0045] The negative pressure mechanism 6 is disposed on one side of the conveying mechanism 2 , and is used to create a negative pressure environment inside the conveying mechanism 2 .

[0046] By providing the conveying mechanism 2 as described above, the answer sheets can be gradually conveyed and moved, so as to facilitate the scanning and counting of the answer sheets; by providing the pressing mechanism 3 and the progressive mechanism 4, the conveying mechanism 2 can be controlled to drive the progressive mechanism 4 when in operation, so that the progressive mechanism 4 gradually moves downward and cooperates with the pressing mechanism 3, and then the answer sheets can be progressively pressed one by one to prevent the answer sheets from loosening when being conveyed one by one, so as to keep a large number of answer sheets together; by providing the negative pressure mechanism 6, the answer sheets can be adsorbed and moved one by one, and by adopting the adsorption method to prevent the answer sheets from being driven, the method of conveying multiple answer sheets at the same time can be effectively avoided, and then the answer sheet at the bottom can be adsorbed and moved one by one, so as to realize the scanning and counting of the answer sheets one by one, thereby improving the scanning accuracy and The final scanning result is guaranteed, and by providing a negative pressure detection function in the structure of the decompression mechanism 5, it is possible to timely understand whether the folded answer sheet is adsorbed, and by detecting the negative pressure inside the negative pressure head 59, it is possible to understand whether the adsorption of the answer sheet is completed, and when adsorbing the answer sheet, the negative pressure head 59 is used to perform the adsorption work in a total of nine negative pressure heads 59, which can ensure that the front end of the answer sheet is adsorbed first, and then the middle end of the answer sheet is adsorbed, and the last step is to adsorb the answer sheet at the tail end; by providing the decompression mechanism 5, after the conveying mechanism 2 moves the answer sheet to the desired position and completely completes the scanning and counting work, the negative pressure mechanism 6 can be controlled to stop the adsorption work one by one, so that the scanned answer sheets can be collected and processed, thereby reducing the work intensity of the staff;

[0047] When in use, a large number of stacked answer sheets are placed in the clamping mechanism 3, and the answer sheets are clamped by the internal clamping function. Then, the controller is operated to control the conveying mechanism 2 to move, and the moving negative pressure mechanism 6 adsorbs the answer sheets one by one. When the answer sheets are finally taken away, the progressive mechanism 4 drives the clamping mechanism 3 to descend one by one to clamp the answer sheets. When the answer sheets are scanned, the decompression mechanism 5 gradually contacts the head end, middle end and tail end of the answer sheets to gradually stop the adsorption work, and then the subsequent collection work is carried out.

[0048] The conveying mechanism 2 includes a conveying roller 22 rotatably connected between the two conveying frames 1, a hollow conveying belt 23 is arranged on the outer side of the conveying roller 22, a motor 21 is fixedly connected to one side of one of the conveying frames 1, and the output end of the motor 21 is fixedly connected to one of the conveying rollers 22;

[0049] When in use, the operation controller controls the motor 21 to rotate one of the conveying rollers 22, so that one of the rotating conveying rollers 22 drives the other conveying roller 22 through the hollow conveying belt 23, and then the moving hollow conveying belt 23 can convey and move the answer sheet;

[0050] The clamping mechanism 3 includes a first support plate 31 fixedly connected to one side of the conveying frame 1, two first limit rods 32 are fixedly connected to the top of the two first support plates 31, an answer sheet placement plate 33 is fixedly connected to the outer side of the four first limit rods 32, a first spring 34 is fixedly connected to the top of the answer sheet placement plate 33 and located on the outer side of the first limit rod 32, a clamping plate 35 is fixedly connected to the top of the first spring 34 and located on the outer side of the first limit rod 32, and the clamping plate 35 is slidably connected to the first limit rod 32;

[0051] When in use, by pulling the pressing plate 35 to slide upward on the outer side of the first limiting rod 32, the pressing plate 35 moving upward stretches the first spring 34, and then the stacked answer sheets can be placed in the answer sheet placement plate 33, and then the pressing plate 35 is released, and the pressing plate 35 is driven by the first spring 34 to press the answer sheets;

[0052] The advancing mechanism 4 includes a fixing rod 43 fixedly connected to the top of the pressing plate 35, the top of the fixing rod 43 is rotatably connected to a flip positioning rod 45, a torsion spring 46 is sleeved on the outer side of the fixing rod 43 and located between the flip positioning rod 45 and the pressing plate 35, and one end of the torsion spring 46 is fixedly connected to the flip positioning rod 45, and one end of the torsion spring 46 is fixedly connected to the flip positioning rod 45, and the end of the torsion spring 46 away from the flip positioning rod 45 is fixedly connected to the pressing plate 35, the top of the first support plate 31 and located inside the pressing plate 35 is fixedly connected to a progressive rod 47, and a plurality of progressive grooves 48 matching the progressive rod 47 are equidistantly provided inside the progressive rod 47, one side of the conveying frame 1 is rotatably connected to a large gear 41, and the side of the large gear 41 away from the conveying frame 1 is connected to a push plate 42 through a first bolt, and one side of the large gear 41 is meshedly connected to a small gear 44, and the small gear 44 is fixedly connected to one side of one of the conveying rollers 22;

[0053] When in use, by designing the circumference of the large gear 41 to be consistent with the number of negative pressure heads 59 moving in threes, when the nine negative pressure heads 59 move to the right below the answer sheet and the last three negative pressure heads 59 drive the tail end of the answer sheet to complete the extraction work, the large gear 41 can drive the push plate 42 to complete a circle of rotation, so that the push plate 42 to turn the flip positioning rod 45, so that the flip positioning rod 45 is away from the progressive rod 47, and the flipped flip positioning rod 45 stretches the torsion spring 46 at the same time. When the bottom answer sheet is completely extracted, the push plate 42 no longer presses the flip positioning rod 45, so that the clamping mechanism 3 moves downward one step on the outside of the progressive rod 47, and then the flip positioning rod 45 is reset under the action of the torsion spring 46, and the flip positioning rod 45 cooperates with the progressive groove 48 in the progressive rod 47, so as to gradually limit the clamping mechanism 3.

[0054] The decompression mechanism 5 includes a plurality of negative pressure heads 59 fixedly connected to the inside of the hollow conveyor belt 23, a limit shaft 51 fixedly connected to the inside of the hollow conveyor belt 23 and located below the negative pressure head 59, a ramp plate 52 fixedly connected to the outside of the limit shaft 51, a gas sealing block 53 is arranged at a fixed distance below the negative pressure head 59 on the top of the ramp plate 52, a second spring 54 is sleeved on the outside of the limit shaft 51 and located above the ramp plate 52, an elliptical block 57 is slidably connected to the inside of the hollow conveyor belt 23 and located on both sides of the ramp plate 52, and the elliptical block 57 is fixedly connected to the outside of the limit shaft 51. A third spring 58 is provided on the outside of the hollow conveyor belt 23, a push inclined block 55 is fixedly connected to one side of the elliptical block 57 and located inside the hollow conveyor belt 23, two second limit rods 56 are slidably connected inside the push inclined block 55, and the two second limit rods 56 are fixedly connected to the hollow conveyor belt 23, a micro negative pressure detector 590 is fixedly connected to the inside of the hollow conveyor belt 23 and located on one side of the ramp plate 52, and a multi-head detection tube 591 is fixedly connected between one side of the micro negative pressure detector 590 and one side of the negative pressure head 59;

[0055] When in use, when the decompression mechanism 5 moves to a certain position, it will be pushed, so that the pushed elliptical block 57 drives the pushing inclined block 55 to slide on the outside of the second limiting rod 56, and when the elliptical block 57 moves, the third spring 58 is compressed, and when the pushing inclined block 55 moves, it will push the ramp plate 52 to move upward, so that the upwardly moving ramp plate 52 slides upward on the outside of the limiting shaft 51, and when the ramp plate 52 moves upward, it will compress the second spring 54, and drive the sealing block 53 through the ramp plate 52 to block the negative pressure head 59, thereby completing the gradual blocking of the answer sheet, and the negative pressure condition in the negative pressure head 59 is detected one by one through the multi-head detection tube 591 by the micro negative pressure detector 590, and after the adsorption work is completely stopped, the three parts of the head end, middle end and tail end of the answer sheet can be separated one by one;

[0056] The negative pressure mechanism 6 includes two protective covers 61 fixedly connected to one side of the hollow conveyor belt 23, a micro negative pressure pump 62 fixedly connected inside the protective cover 61, a disassembly filter box 63 connected inside the protective cover 61 through a second bolt, and a plurality of filter screens 64 fixedly connected inside the disassembly filter box 63 at equal intervals;

[0057] During use, when it is necessary to maintain negative pressure inside the hollow conveyor belt 23, the operation controller controls the micro negative pressure pump 62 to run and extract the air in the hollow conveyor belt 23 by disassembling the filter box 63, and when the air is extracted, the filter 64 in the filter box 63 can be removed to filter the fine dust in the air, so as to prevent dust from accumulating in the negative pressure head 59 and causing blockage. When it is necessary to clean the disassembled filter box 63, the disassembled filter box 63 can be removed by removing the second bolt;

[0058] Embodiment 2

[0059] like Figure 1-14 In the second embodiment, other structures remain unchanged, and the difference from the first embodiment is

[0060] Two contact blocks 9 are fixedly connected to the top of the conveying frame 1, a contact plate 8 is fixedly connected to the top of the conveying frame 1 and below the clamping mechanism 3, and an optical sensor 10 is fixedly connected to the top of the conveying frame 1;

[0061] When the decompression mechanism 5 moves to the bottom of the pressing mechanism 3 during use, the negative pressure heads 59 are arranged in a three-by-three arrangement, so that the front negative pressure head 59 has the adsorption function to start adsorbing the head end of the answer sheet, thereby driving the bottom answer sheet to move. When the middle negative pressure head 59 no longer presses the touch plate 8, the middle negative pressure head 59 has the adsorption function to adsorb the middle of the answer sheet, thereby continuing to drive the answer sheet to move. When the tail negative pressure head 59 is separated from the touch plate 8, the tail end of the answer sheet can be adsorbed. At this time, the adsorption work of the head end, middle end and tail end of the answer sheet can be completed, and then it moves to the bottom of the optical sensor 10 for optical scanning detection and counting, and then moves to the position of the touch block 9 to gradually separate the head end, middle end and tail end.

[0062] The spacing distance of the progressive grooves 48 is 0.1mm-0.5mm. By designing the spacing between the multiple progressive grooves 48 to be 0.1mm-0.5mm, it can be pressed down step by step according to the thickness of a single answer sheet to prevent the downward position from changing;

[0063] It also includes a storage mechanism 7, which is arranged on one side of the conveying frame 1 and is used to store answer sheets that have completed scanning work. The storage mechanism 7 includes a fixed plate 71 fixedly connected to one side of the conveying frame 1, a guide plate 72 fixedly connected to the top of the two fixed plates 71, a guide groove 73 is provided inside the guide plate 72, a fixed box 74 is fixedly connected between the two fixed plates 71 and below the guide plate 72, a collection box 75 is provided inside the fixed box 74, a lifting plate 77 is slidably connected to the inner wall of the collection box 75, and four fourth springs 76 are fixedly connected to the bottom of the lifting plate 77;

[0064] When in use, when the head end of the answer sheet enters the guide groove 73 for diversion work, the answer sheet can enter the lifting plate 77 for collection after it is completely detached, and when the number of answer sheets gradually increases, the fourth spring 76 under the lifting plate 77 will be pressed to slowly move downward, and finally, after the collection work is completed, the collection box 75 can be pulled out to take out the answer sheets;

[0065] The guide plate 72 is set to an inclination angle of 15 degrees, and the inner wall of the guide groove 73 is smoothed. By designing the guide plate 72 to be 15 degrees, the answer sheet can be moved obliquely downward, and by smoothing the inside of the guide groove 73, it can be ensured that the answer sheet continues to slide downward and avoid stopping due to friction.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high accuracy answer sheet counting machine, characterized in that: include: Conveyor rack(1) A conveying mechanism (2), wherein the conveying mechanism (2) is arranged between the two conveying frames (1), and the conveying mechanism (2) is used to convey the answer sheet; A clamping mechanism (3), the clamping mechanism (3) being arranged on the top of the conveying frame (1), and the clamping mechanism (3) being used to place and clamp the answer sheet; A progressive mechanism (4), the progressive mechanism (4) being arranged on one side of the conveying frame (1) and the pressing mechanism (3), and the progressive mechanism (4) being used for progressively moving downward to press the answer sheet; A decompression mechanism (5), the decompression mechanism (5) is arranged inside the conveying mechanism (2), and the decompression mechanism (5) is used to stop adsorbing the answer sheet and change the position of the answer sheet; A negative pressure mechanism (6), wherein the negative pressure mechanism (6) is arranged on one side of the conveying mechanism (2), and the negative pressure mechanism (6) is used to create a negative pressure environment inside the conveying mechanism (2).

2. The answer sheet counting machine with high accuracy according to claim 1, characterized in that: The conveying mechanism (2) comprises a conveying roller (22) rotatably connected between two conveying frames (1), a hollow conveying belt (23) being arranged on the outer side of the conveying roller (22), a motor (21) being fixedly connected to one side of one of the conveying frames (1), and an output end of the motor (21) being fixedly connected to one of the conveying rollers (22).

3. The answer sheet counting machine with high accuracy according to claim 2, characterized in that: The clamping mechanism (3) comprises a first support plate (31) fixedly connected to one side of the conveying frame (1); two first limit rods (32) are fixedly connected to the tops of the two first support plates (31); an answer sheet placement plate (33) is fixedly connected to the outer sides of the four first limit rods (32); a first spring (34) is fixedly connected to the top of the answer sheet placement plate (33) and located on the outer sides of the first limit rods (32); a clamping plate (35) is fixedly connected to the top of the first spring (34) and located on the outer sides of the first limit rods (32); and the clamping plate (35) is slidably connected to the first limit rods (32).

4. The answer sheet counting machine with high accuracy according to claim 3, characterized in that: The progressive mechanism (4) comprises a fixed rod (43) fixedly connected to the top of the pressing plate (35); the top of the fixed rod (43) is rotatably connected to a flip positioning rod (45); a torsion spring (46) is sleeved on the outer side of the fixed rod (43) and located between the flip positioning rod (45) and the pressing plate (35); one end of the torsion spring (46) is fixedly connected to the flip positioning rod (45); one end of the torsion spring (46) away from the flip positioning rod (45) is fixedly connected to the pressing plate (35); the first support plate (31) A progressive rod (47) is fixedly connected to the top of the conveying frame (1) and is located inside the pressing plate (35). A plurality of progressive grooves (48) matching the progressive rod (47) are equidistantly provided inside the progressive rod (47). A large gear (41) is rotatably connected to one side of the conveying frame (1). A side of the large gear (41) away from the conveying frame (1) is connected to a push plate (42) via a first bolt. A small gear (44) is meshingly connected to one side of the large gear (41). The small gear (44) is fixedly connected to one side of one of the conveying rollers (22).

5. The answer sheet counting machine with high accuracy according to claim 2, characterized in that: The decompression mechanism (5) comprises a plurality of negative pressure heads (59) fixedly connected to the inside of the hollow conveyor belt (23); a limiting shaft (51) is fixedly connected to the inside of the hollow conveyor belt (23) and below the negative pressure head (59); a ramp plate (52) is fixedly connected to the outside of the limiting shaft (51); a gas sealing block (53) is provided at the top of the ramp plate (52) and at a fixed distance below the negative pressure head (59); a second spring (54) is sleeved on the outside of the limiting shaft (51) and above the ramp plate (52); an elliptical block (57) is slidably connected to the inside of the hollow conveyor belt (23) and on both sides of the ramp plate (52); the elliptical block (57) is slidably connected to the inside of the hollow conveyor belt (23) and on both sides of the ramp plate (52); A third spring (58) is provided on the outside of the block (57) and located on the outside of the hollow conveyor belt (23); a push inclined block (55) is fixedly connected to one side of the elliptical block (57) and located inside the hollow conveyor belt (23); two second limit rods (56) are slidably connected inside the push inclined block (55); the two second limit rods (56) are fixedly connected to the hollow conveyor belt (23); a micro negative pressure detector (590) is fixedly connected inside the hollow conveyor belt (23) and located on one side of the ramp plate (52); a multi-head detection tube (591) is fixedly connected between one side of the micro negative pressure detector (590) and one side of the negative pressure head (59).

6. The answer sheet counting machine with high accuracy according to claim 2, characterized in that: The negative pressure mechanism (6) comprises two protective covers (61) fixedly connected to one side of the hollow conveyor belt (23); a micro negative pressure pump (62) is fixedly connected inside the protective covers (61); a disassembly filter box (63) is connected inside the protective covers (61) via a second bolt; and a plurality of filter screens (64) are fixedly connected inside the disassembly filter box (63) at equal intervals.

7. The answer sheet counting machine with high accuracy according to claim 1, characterized in that: Two contact blocks (9) are fixedly connected to the top of the conveying frame (1), a contact plate (8) is fixedly connected to the top of the conveying frame (1) and below the clamping mechanism (3), and an optical sensor (10) is fixedly connected to the top of the conveying frame (1).

8. The answer sheet counting machine with high accuracy according to claim 4, characterized in that: The spacing distance of the progressive grooves (48) is 0.1 mm-0.5 mm.

9. The answer sheet counting machine with high accuracy according to claim 1, characterized in that: The invention also comprises a storage mechanism (7), wherein the storage mechanism (7) is arranged at one side of the conveying frame (1), and the storage mechanism (7) is used to store answer sheets that have completed scanning work, and the storage mechanism (7) comprises a fixed plate (71) fixedly connected to one side of the conveying frame (1), a guide plate (72) is fixedly connected to the top of the two fixed plates (71), a guide groove (73) is provided inside the guide plate (72), a fixed box (74) is fixedly connected between the two fixed plates (71) and located below the guide plate (72), a collection box (75) is arranged inside the fixed box (74), a lifting plate (77) is slidably connected to the inner wall of the lifting plate (75), and four fourth springs (76) are fixedly connected to the bottom of the lifting plate (77).

10. The answer sheet counting machine with high accuracy according to claim 9, characterized in that: The guide plate (72) is set to have an inclination angle of 15 degrees, and the inner wall of the guide groove (73) is smoothed.

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