A paper unloading device

Abstract

The application provides a paper unloading device, which comprises a production line platform for placing paper products, a product push rod movably connected to the production line platform, and a conveying machine group arranged on one side of the product platform, the product push rod abuts against the paper products to push the paper products towards the conveying machine group, a product tray is arranged on one side of the conveying machine group, the conveying machine group comprises a mechanical arm assembly, the mechanical arm assembly comprises a first regular part and a second regular part, an operator can control the mechanical arm assembly to move towards the product tray along with the unloading board on the unloading board transverse movement group on the mechanical arm transverse movement group, and in the movement process, the first regular part and the second regular part on the mechanical arm assembly can simultaneously move towards the paper products on the unloading board, so that the periphery of the paper products is regularized, the transmission line can be continuously transmitted without stopping, and the transmission efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the printing technical field, in particular to a paper unloading device. BACKGROUND

[0002] Printing (Graphic Arts, also using Graphic Communications, namely graphic communication) is a technology that converts the content of the original manuscript into a batch by transferring ink to the surface of paper, textiles, plastics, leather, PVC, PC and other materials through the processes of manuscript, ink application, and pressure. Printing is the process of transferring the approved printing plate to the printing material through the printing machine and special ink.

[0003] In the printing industry, paper products often go through various processes on the transmission line for processing. After processing, the products need to be offline and placed on product trays, and then transported by forklifts. In the traditional process, the offline paper products are mainly transported by manual labor, which not only has low work efficiency, but also often causes the products to be messy during the manual transportation process, affecting the subsequent processing of the paper products. With the development of mechanization technology, an automatic paper unloading mechanism for conveying paper products has been developed to replace the traditional manual paper transportation with mechanical transportation and has been applied in actual production.

[0004] The current paper unloading machine uses single-sided positioning, which cannot ensure the neatness of the products during the conveying process, and cannot adjust the position of the products on the machine table during the conveying process. Therefore, the work staff needs to stop the line regularly to arrange the products on the paper unloading machine before starting the conveying work, which reduces the work efficiency of the paper unloading machine to a certain extent. Therefore, it is necessary to design a new automatic paper unloading mechanism with clamping force control and buffering. SUMMARY

[0005] Therefore, the present application aims to provide a paper unloading device to solve the problem of the current paper unloading machine in the prior art, which uses single-sided positioning and cannot ensure the neatness of the products during the conveying process, and cannot adjust the position of the products on the machine table during the conveying process. Therefore, the work staff needs to stop the line regularly to arrange the products on the paper unloading machine before starting the conveying work, which reduces the work efficiency of the paper unloading machine to a certain extent.

[0006] The paper unloading device provided by the present application comprises a production line platform for placing paper products, a product push rod movably connected to the production line platform, and a conveying unit arranged on one side of the product platform. The product push rod abuts against the paper products to push the paper products towards the conveying unit. The conveying unit is provided with a product tray on one side.

[0007] The conveying unit comprises a mechanical arm assembly and a paper unloading plate arranged directly below the mechanical arm assembly and abutting against one side of the production line platform for collecting the paper products on the production line platform moving towards the paper unloading plate, the mechanical arm assembly comprises a mounting frame for connecting the conveying unit and a first sizing assembly and a second sizing assembly fixedly connected to the mounting frame respectively, and the first sizing assembly and the second sizing assembly enclose a containing space in abutment with the edge of the paper products.

[0008] The conveying unit further comprises a longitudinal movement group arranged on one side of the production line platform, a longitudinal movement base plate movably connected to the longitudinal movement group, a mechanical arm transverse movement group fixedly connected to the longitudinal movement base plate, and a paper unloading plate transverse movement group fixedly connected to the longitudinal movement base plate away from the mechanical arm transverse movement group, the longitudinal movement group drives the longitudinal movement base plate to move towards and away from the product tray, the mechanical arm transverse movement group is used to drive the mechanical arm assembly to move towards and away from the product tray, and the paper unloading plate transverse movement group is used to drive the paper unloading plate to move towards and away from the product tray.

[0009] The above, the operator can place the paper products on the production line platform and abut against the product push rod, then push the paper products to the paper unloading plate through the product push rod, then the operator can control the mechanical arm assembly to move towards the product tray along with the paper unloading plate on the paper unloading plate transverse movement group on the mechanical arm transverse movement group, and in the moving process, the first sizing member and the second sizing member on the mechanical arm assembly can be controlled to move towards the paper products on the paper unloading plate at the same time, so that the paper products are sized around and the transmission line is ensured to be transmitted without stopping, the transmission efficiency is improved, finally the longitudinal movement base plate drives the mechanical arm transverse movement group and the paper unloading plate transverse movement group to descend to the product tray through the longitudinal movement group, and the arranged paper products are pushed from the paper unloading plate to the product tray by the mechanical arm assembly to complete the transfer work, solving the problem that the current paper unloading machine adopts single-sided positioning and cannot ensure the neatness of the products in the conveying process, and the position of the products on the machine table cannot be adjusted during the conveying process, the work staff needs to stop the line regularly to arrange the products on the paper unloading machine before starting the conveying work, which reduces the work efficiency of the paper unloading machine to a certain extent.

[0010] Further, the first connecting plate is movably connected to the mounting frame, and the second connecting plate is movably connected to the paper unloading plate.

[0011] Further, the first shaping assembly comprises first shaping plates arranged at two ends, first and second sensing switches penetrating through the two first shaping plates respectively, a first driving assembly for driving the two first shaping plates to move closer to or away from each other, a first movable frame for connecting the first driving assembly and the first shaping plates, and a second driving assembly arranged at the top of the first movable frame for driving the first shaping plates to move, a first spring is arranged between the first shaping plates and the second driving assembly, a first displacement sensor is arranged at the bottom of the first driving assembly, and the second sensing switch is connected to the two ends of the first displacement sensor respectively.

[0012] Further, the first driving assembly comprises a first driving motor, first transmission shafts arranged at the output ends of the two sides of the first driving motor respectively, a first coupling connected to the end of the first transmission shaft away from the first driving motor, and a first lead screw fixed to the end of the first coupling away from the first transmission shaft, the first lead screw penetrates through the first movable frame, and a first lead screw nut is arranged at the connection between the first movable frame and the first lead screw.

[0013] Further, the second driving assembly comprises telescopic cylinders penetrating through the two sides of the first movable frame, a spring box fixedly connected to the middle part of the top end of the first movable frame, a spring cutting plate for connecting the two telescopic cylinders and the spring box, and a first sliding rail arranged close to the telescopic cylinders, the first sliding rail penetrates through the first movable frame.

[0014] Further, the second shaping assembly comprises second shaping plates arranged at two ends, third and fourth sensing switches penetrating through the two second shaping plates respectively, a third driving assembly for driving the two second shaping plates to move closer to or away from each other, and a second movable frame for connecting the second shaping plates and the third driving assembly, a second spring is arranged between the second shaping plates and the third driving assembly, a second displacement sensor is arranged at the bottom of the third driving assembly, and the fourth sensing switch is connected to the two ends of the second displacement sensor respectively.

[0015] Further, the third driving assembly comprises a second driving motor, second transmission shafts arranged at the output ends of the two sides of the second driving motor respectively, a second coupling connected to the end of the second transmission shaft away from the second driving motor, and a second lead screw fixed to the end of the second coupling away from the second transmission shaft, and a second lead screw nut is arranged at the connection between the second movable frame and the second lead screw. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the paper unloading device in the embodiment of the application.

[0017] Figure 2Structure diagram of the mechanical arm assembly in the paper unloading device in the embodiment of the present application;

[0018] Figure 3 Structure diagram of the first regularizing assembly on the mechanical arm assembly in the paper unloading device in the embodiment of the present application;

[0019] Figure 4 Structure diagram of the first regularizing assembly on the mechanical arm assembly in the paper unloading device in the embodiment of the present application;

[0020] Figure 5 Structure diagram of the second regularizing assembly on the mechanical arm assembly in the paper unloading device in the embodiment of the present application;

[0021] Figure 6 Structure diagram of the second regularizing assembly on the mechanical arm assembly in the paper unloading device in the embodiment of the present application.

[0022] Main structure symbol explanation:

[0023]

[0024]

[0025] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. Several embodiments of the present application are given in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0029] Embodiment one

[0030] Referring to Figures 1 to 6 , the paper unloading device in the embodiment of the application is shown, including a production line platform 1 for placing paper products 3, a product push rod 2 movably connected to the production line platform 1, and a conveying machine group arranged on one side of the product platform 1, the product push rod 2 abuts against the paper products 3 for pushing the paper products 3 towards the conveying machine group, the conveying machine group includes a mechanical arm assembly 5 and a paper unloading board 4 arranged directly below the mechanical arm assembly 5, the paper unloading board 4 abuts against one side of the production line platform 1 for collecting the paper products 3 on the production line platform 1 moving towards the paper unloading board 4, the mechanical arm assembly 5 includes a mounting frame 50 for connecting the conveying machine group and a first shaping assembly 51 and a second shaping assembly 52 fixedly connected to the mounting frame 50 respectively, the first shaping assembly 51 and the second shaping assembly 52 form an accommodation space in contact with the edge of the paper products 3.

[0031] Further, the conveying unit further comprises a longitudinal moving group 11 arranged on one side of the production line platform 1, a longitudinal moving base plate 10 movably connected to the longitudinal moving group 11, a mechanical arm transverse moving group 8 fixedly connected to the longitudinal moving base plate 10, and a paper unloading plate transverse moving group 9 fixedly connected to the longitudinal moving base plate 10 away from the mechanical arm transverse moving group 8, the mechanical arm transverse moving group 8 movably connected with a first connecting plate 6, the first connecting plate 6 fixedly connected with a mounting frame 50, the paper unloading plate transverse moving group 9 movably connected with a second connecting plate 7, the second connecting plate 7 fixedly connected with a paper unloading plate 4, one side of the conveying unit is provided with a product tray 12, the first shaping assembly 51 comprises first shaping plates 5101 arranged at both ends, first and second sensing switches 5102 and 5103 penetrating through the two first shaping plates 5101 respectively, a first driving assembly for driving the two first shaping plates 5101 to move close to and away from each other, a first movable frame 5105 for connecting the first driving assembly and the first shaping plates 5101, and a second driving assembly arranged at the top of the first movable frame 5105 for driving the first shaping plates 5101 to move, a first spring 5116 is arranged between the first shaping plates 5101 and the second driving assembly, a first displacement sensor 5115 is arranged at the bottom of the first driving assembly, the first displacement sensor 5115 is connected with the second sensing switch 5103 at both ends respectively, the first driving assembly comprises a first driving motor 5114, first transmission shafts 5113 arranged at both sides of the output end of the first driving motor 5114 respectively, a first coupling 5112 connected at one end of the first transmission shaft 5113 away from the first driving motor 5114, and a first lead screw 5110 fixed at one end of the first coupling 5112 away from the first transmission shaft 5113, the first lead screw 5110 penetrates through the first movable frame 5105, a first lead screw nut 5109 is arranged at the connection between the first movable frame 5105 and the first lead screw 5110, the second driving assembly comprises telescopic cylinders 5104 penetrating through both sides of the first movable frame 5105, a spring box 5108 fixedly connected at the middle of the top end of the first movable frame 5105, a spring cutting plate 5107 for connecting the two telescopic cylinders 5104 and the spring box 5108, and a first sliding rail 5106 arranged close to the telescopic cylinder 5104, the first sliding rail 5106 penetrates through the first movable frame 5105, the second shaping assembly comprises second shaping plates 5201 arranged at both ends, third and fourth sensing switches 5202 and 5203 penetrating through the two second shaping plates 5201 respectively, a third driving assembly for driving the two second shaping plates 5201 to move close to and away from each other, and a second movable frame 5204 for connecting the second shaping plates 5201 and the third driving assembly, a second spring 5212 is arranged between the second shaping plates 5201 and the third driving assembly, a second displacement sensor 5211 is arranged at the bottom of the third driving assembly, the second displacement sensor 5211 is connected with the fourth sensing switch 5203 at both ends respectively,The third driving assembly comprises a second driving motor 5210, a second transmission shaft 5209 arranged at the output ends of the second driving motor 5210 respectively, a second coupling 5208 connected at the end of the second transmission shaft 5209 away from the second driving motor 5210, and a second screw rod 5206 fixed on the second coupling 5208 away from the second transmission shaft 5209, and a second movable frame 5204 is arranged with a second screw rod nut 5205 at the connection position of the second movable frame 5204 and the second screw rod 5206.

[0032] It should be noted that the first regularizing assembly 51 is used for clamping and regularizing the left and right sides of the paper product 3 in the conveying direction of the production line platform 1, and the second regularizing assembly 52 is based on the first regularizing assembly 51 and forms a cross distribution, which is used for clamping and regularizing the front and back sides of the paper product 3. In addition, in some optional embodiments of the present application, the first sensing switch 5102 and the third sensing switch 5202 can be pressure sensors respectively arranged at the first regularizing assembly 51 and the second regularizing assembly 52, which are used for detecting whether the product 3 is clamped in place, and the second sensing switch 5102 and the fourth sensing switch 5203 can be spring blocks, wherein the second sensing switch 5102 is connected with the detection end of the first displacement sensor 5115 through a pull rod, which is used for detecting the opening distance between the two first regularizing plates 5101, and the fourth sensing switch 5203 is connected with the detection end of the second displacement sensor 5211 through a pull rod, which is used for detecting the opening distance between the two second regularizing plates 5201. The displacement sensor is also called a linear sensor, which is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electrical quantities. In the production process, the measurement of displacement is generally divided into two types: measuring the size of the real object and measuring the mechanical displacement. According to the form of the measured variable, the displacement sensor can be divided into analog and digital types. The analog type can be divided into physical type and structural type. The commonly used displacement sensor is mostly of analog structural type, including potentiometer type displacement sensor, inductance type displacement sensor, self-encoder, capacitance type displacement sensor, eddy current type displacement sensor, Hall type displacement sensor, etc.

[0033] In specific implementation, first, the operator can directly place the paper product 3 on the production line platform 1, or connect the production line platform 1 away from the conveying machine group side with the conveying line on the paper processing line. To avoid the product push rod 2 on the production line platform 1 from blocking the paper product 3 during transmission and ensure smooth transmission of the paper product 3, the production line platform 1 can be installed at the bottom of the conveying line and the product push rod 2 can be hidden at the low end of the conveying line. When the conveying line transmits the paper product 3, it can directly make it fall over the product push rod 2 onto the production line platform 1. Then the operator can open the product push rod 2. In some optional embodiments, the product push rod 2 is embedded in the production line platform 1. Correspondingly, a motorized telescopic rod or hydraulic push rod is provided at the bottom end of the production line platform 1 to control the product push rod 2 to move towards or away from the conveying machine group. The product push rod 2 is driven by the motorized telescopic rod or hydraulic push rod to move on the production line platform 1 and abut against one side of the paper product 3, then push it to the unloading board 4 on the conveying machine group. The unloading board 4 abuts against the side of the production line platform 1 away from the conveying line. Then the operator can control the conveying machine group to drive the unloading board 4 to move towards the product tray 12, complete the conveying of the paper product 3 on the unloading board 4. Before conveying, it needs to be noted that the conveying structure required for the unloading board 4 to move towards the product tray 12 on the conveying machine group includes the unloading board 4, the mechanical arm assembly 5, the longitudinal moving group 11, the mechanical arm horizontal moving group 8, and the unloading board horizontal moving group 9. The mechanical arm horizontal moving group 8 and the unloading board horizontal moving group 9 are installed on the longitudinal moving group 11 through the longitudinal moving base plate 10. The space between the mechanical arm horizontal moving group 8 and the unloading board horizontal moving group 9 is fixed and they move longitudinally on the longitudinal moving group 11 together with the longitudinal moving base plate 10. In some optional embodiments, the longitudinal moving group 11 drives the longitudinal moving base plate 10 to move longitudinally on the longitudinal moving group 11 through a chain or a motor-driven screw thread transmission with a screw nut on the longitudinal moving base plate 10. In addition, the mechanical arm horizontal moving group 8 and the unloading board horizontal moving group 9 can be provided with the above-mentioned transmission structure such as a screw transmission or a chain transmission to drive the first connecting plate 6 embedded in the mechanical arm horizontal moving group 8 and the second connecting plate 7 embedded in the unloading board horizontal moving group 9, respectively, to make the mechanical arm assembly 5 connected with the first connecting plate 6 and the unloading board 4 connected with the second connecting plate 7 slide along the tracks on the mechanical arm horizontal moving group 8 and the unloading board horizontal moving group 9, respectively. In addition, the moving track of the longitudinal moving base plate 10 on the longitudinal moving group 11 is perpendicular to the moving tracks of the first connecting plate 6 on the mechanical arm horizontal moving group 8 and the second connecting plate 7 on the unloading board horizontal moving group 9. Then the operator can control the unloading board horizontal moving group 9 to drive the unloading board 4 and the paper product 3 to move horizontally towards the product tray 12, so that the unloading board 4 is parallel to the product tray 12. Then control the longitudinal moving group 11 to drive the unloading board horizontal moving group 9 to descend towards the product tray 12.Finally, the paper products 3 on the paper unloading board 4 are pushed to the product tray 12 by the mechanical arm assembly 5 to complete the conveying work of the paper products 3. In some optional embodiments, the process of conveying the paper unloading board 4 to the product tray 12 by the conveying machine assembly can be set as a directional cycle work to reduce the control burden caused by the long-time control of the paper unloading device by the operator.

[0034] Further, after the product push rod 2 pushes the paper product 3 onto the paper discharge board 4, the mechanical arm assembly 5 can be opened, and the first and second shaping assemblies 51 and 52 are started at the same time to drive the first and second shaping plates 5101 and 5201 to move towards the paper product 3. Specifically, the first and second drive motors 5114 and 5210 are started at the same time, the first drive motor 5114 drives the first transmission shaft 5113 connected to its two output ends to rotate, and the first transmission shaft 5113 in turn drives the first coupling 5112 and the first lead screw 5110 to rotate. The threads of the two first lead screws 5110 are arranged in opposite directions, so that the first lead screw nut 5109 is driven by the first lead screw 5110 to rotate around it, thereby driving the first movable frame 5105 to move towards and away from the first drive motor 5114, and controlling the first shaping plate 5101 connected to the first movable frame 5105 to move towards and away from the paper product 3. As described above, the second shaping assembly 52 is driven in the same way as the first shaping assembly 51. The second drive motor 5210 in turn drives the two second transmission shafts 5209, the second coupling 5208, and the second lead screw 5206 to rotate and output, so that the second lead screw nut 5205 connected to the second lead screw 5206 moves along the thread track of the second lead screw 5206, and drives the second movable frame 5204 and the second shaping plate 5201 connected to the second lead screw nut 5205 to move towards and away from the paper product 3. It should be noted that the movement direction of the first shaping plate 5101 is perpendicular to the movement direction of the second shaping plate 5201. As can be understood, the first shaping plate 5101 moves left and right on both sides of the paper product 3, and the second shaping plate 5201 moves front and back on both sides of the paper product 3, thereby moving around the paper product 3. This can effectively arrange the disordered paper products 3 on the paper discharge board 4 and center them on the paper discharge board 4, thereby preventing the paper products 3 from being damaged during the conveying process. Further, first and third sensing switches 5102 and 5202 are arranged at the contact positions of the first and second shaping plates 5101 and 5201 with the paper product 3, respectively. When the first and second shaping plates 5101 and 5201 contact the paper product 3, pressure sensing signals are obtained and fed back to the controller on the paper discharge device. The controller controls the first and second drive motors 5114 and 5210 to stop outputting. Furthermore, first and second displacement sensors 5115 and 5221 are arranged on the first and second shaping assemblies 51 and 52, respectively, and are connected to second and fourth sensing switches 5103 and 5203 on the first and second shaping plates 5101 and 5201, respectively, for real-time detection of the mutual movement distance between the two first and second shaping plates 5101 and 5201.The operator can adjust the triggering of the first displacement sensor 5115 and the second displacement sensor 5211 according to the size of the paper product 3 to control the movement of the first sizing plate 5101 and the second sizing plate 5201 to stop.

[0035] In addition, during the conveying of the paper discharge plate 4 towards the product tray 12, the operator can control the mechanical arm assembly 5 to move in the same direction as the paper discharge plate 4 on the paper discharge plate cross-moving group 9 on the mechanical arm cross-moving group 8, and during the movement, the mechanical arm assembly 5 can arrange the paper product 3 on the paper discharge plate 4 and ensure the non-stop conveying of the conveying line, thereby improving the conveying efficiency.

[0036] In summary, the operator can place the paper product 3 on the production line platform 1 and abut against the product push rod 2, then push the paper product 3 to the paper discharge plate 4 through the product push rod 2, then the operator can control the mechanical arm assembly 5 to move in the same direction as the paper discharge plate 4 on the paper discharge plate cross-moving group 9 on the mechanical arm cross-moving group 8, and during the movement, the first sizing member 51 and the second sizing member 52 on the mechanical arm assembly 5 can move towards the paper product 3 on the paper discharge plate 4 at the same time, so that the paper product 3 is sized around, and the non-stop conveying of the conveying line is ensured, thereby improving the conveying efficiency, finally, the longitudinal moving group 11 controls the longitudinal moving base plate 10 to lower the mechanical arm cross-moving group 8 and the paper discharge plate cross-moving group 9 to the product tray 12, and the mechanical arm assembly 5 pushes the arranged paper product 3 from the paper discharge plate 4 to the product tray 12 to complete the transfer work, thereby solving the problem that the current paper discharging machine uses single-sided positioning, cannot ensure the neatness of the product during conveying, cannot adjust the position of the product on the machine during conveying, and needs the staff to stop the line regularly to arrange the product on the paper discharging machine before starting the conveying work, which reduces the work efficiency of the paper discharging machine to a certain extent.

[0037] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A paper unloading device characterized by: The paper product line platform for placing paper products, product push rod movably connected to the paper product line platform, and the conveying machine group arranged on one side of the paper product line platform, the product push rod abutting against the paper products for pushing the paper products towards the conveying machine group, and the product tray arranged on one side of the conveying machine group; The conveying machine group comprises a mechanical arm assembly and a paper unloading plate arranged directly below the mechanical arm assembly, the paper unloading plate abutting against one side of the paper product line platform for collecting the paper products on the paper product line platform moving towards the paper unloading plate, and the mechanical arm assembly comprising a mounting frame for connecting the conveying machine group and a first sizing assembly and a second sizing assembly fixedly connected to the mounting frame respectively, the first sizing assembly and the second sizing assembly enclosing a containing space abutting against the edges of the paper products; The conveying machine group further comprises a longitudinal movement group arranged on one side of the paper product line platform, a longitudinal movement base plate movably connected to the longitudinal movement group, a mechanical arm transverse movement group fixedly connected to the longitudinal movement base plate, and a paper unloading plate transverse movement group fixedly connected to one side of the longitudinal movement base plate away from the mechanical arm transverse movement group, the longitudinal movement group driving the longitudinal movement base plate to move towards and away from the product tray, the mechanical arm transverse movement group driving the mechanical arm assembly to move towards and away from the product tray, and the paper unloading plate transverse movement group driving the paper unloading plate to move towards and away from the product tray; The first sizing assembly comprises first sizing plates arranged at both ends, first and second sensing switches penetrating through the first sizing plates respectively, a first driving assembly for driving the first sizing plates to move towards and away from each other, a first movable frame for connecting the first driving assembly and the first sizing plates, and a second driving assembly arranged on the top of the first movable frame for driving the first sizing plates to move, a first spring arranged between the first sizing plates and the second driving assembly, a first displacement sensor arranged at the bottom of the first driving assembly, and the second sensing switch connected to both ends of the first displacement sensor respectively; The second sizing assembly comprises second sizing plates arranged at both ends, third and fourth sensing switches penetrating through the second sizing plates respectively, a third driving assembly for driving the second sizing plates to move towards and away from each other, and a second movable frame for connecting the second sizing plates and the third driving assembly, a second spring arranged between the second sizing plates and the third driving assembly, a second displacement sensor arranged at the bottom of the third driving assembly, and the fourth sensing switch connected to both ends of the second displacement sensor respectively.

2. The paper ejecting device according to claim 1, characterized in that: A first connecting plate is movably connected to the mechanical arm transverse movement group, the first connecting plate is fixedly connected to the mounting frame, a second connecting plate is movably connected to the paper unloading plate transverse movement group, and the second connecting plate is fixedly connected to the paper unloading plate.

3. The paper ejecting device according to claim 2, characterized in that: The first driving assembly comprises a first driving motor, first transmission shafts arranged at the output ends of the first driving motor respectively, a first coupling connected at the end of the first transmission shaft away from the first driving motor, and a first lead screw fixed at the end of the first coupling away from the first transmission shaft, wherein the first lead screw penetrates the first movable frame, and a first lead screw nut is arranged at the connection between the first movable frame and the first lead screw.

4. The paper ejecting device according to claim 3, characterized in that: The second driving assembly comprises telescopic cylinders penetrating the first movable frame, spring boxes fixedly connected at the middle part of the top end of the first movable frame, spring cutting plates for connecting the two telescopic cylinders and the spring boxes, and first sliding rails arranged close to the telescopic cylinders, wherein the first sliding rails penetrate the first movable frame.

5. The paper ejecting device according to claim 4, characterized in that: The third driving assembly comprises a second driving motor, second transmission shafts arranged at the output ends of the second driving motor respectively, a second coupling connected at the end of the second transmission shaft away from the second driving motor, and a second lead screw fixed at the end of the second coupling away from the second transmission shaft, wherein the second movable frame is provided with a second lead screw nut at the connection between the second movable frame and the second lead screw.

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