Plate ejector for plate selection automatic line

Abstract

The application discloses a board removing machine of a board selecting automatic line and relates to the technical field of pencil production equipment. The board removing machine solves the problems of the existing board removing machine, such as poor board removing effect, low overall efficiency, instability and influence on production efficiency of a subsequent process. The board removing machine comprises a board conveying mechanism, a discharging guide assembly is arranged above the board conveying mechanism, a discharging assembly is arranged on one side of a feeding end of the board conveying mechanism, a material collecting assembly is arranged at a discharging end of the board conveying mechanism, a board removing wheel mechanism is arranged above the discharging end of the board conveying mechanism and cooperates with the board conveying mechanism to convey pencil boards to the material collecting assembly, and the rotating directions of the board removing wheel mechanism and the board conveying mechanism are opposite to each other to form a torsional force to send out the pencil boards. The board removing machine has the advantages of higher board removing efficiency, better effect, higher stability and meeting the board removing demands of pencil boards with different thicknesses.

Description

Technical Field

[0001] This invention relates to the field of pencil production equipment technology, specifically to an automatic line-type plate-removing machine. Background Technology

[0002] Pencils are the most commonly used writing tool for elementary school students, art students, and draftsmen. They mainly consist of three parts: the lead, the barrel, and the barrel coating. During pencil production, due to the varying quality of pencil boards, they need to be screened and classified according to quality. Existing rejection machines typically transport the inspected pencil boards directly via a conveyor belt. This lack of guidance during unloading easily leads to confusion. Simply stacking the boards and directly rejecting them via the conveyor belt is ineffective, resulting in poor overall efficiency, instability, and negatively impacting the production efficiency of subsequent processes. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of existing board rejection machines, such as poor rejection effect, poor overall efficiency, lack of stability, and impact on the production efficiency of subsequent processes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic pencil board sorting line and a pencil board removal machine includes a pencil board removal conveying mechanism for conveying sorted pencil boards. Above the pencil board removal conveying mechanism is a feeding guide assembly for guiding the pencil boards during transport. On one side of the feeding end of the pencil board removal conveying mechanism is a feeding assembly for pushing the sorted pencil boards onto the mechanism. At the discharge end of the pencil board removal conveying mechanism is a receiving assembly for collecting and stacking the sorted pencil boards. Above the discharge end of the pencil board removal conveying mechanism is a pencil board removal wheel mechanism that works in conjunction with the conveying mechanism to transport the pencil boards to the receiving assembly. The pencil board removal wheel mechanism rotates in the opposite direction to the pencil board removal conveying mechanism, creating a winching force to send the pencil boards out.

[0006] A further improvement is that it also includes a board-scraping frame, and the board-scraping conveying mechanism includes a board-scraping conveyor belt installed on the board-scraping frame and a board-scraping conveyor motor installed inside the board-scraping frame. The output end of the board-scraping conveyor motor is connected to one end of the board-scraping conveyor belt roller at the discharge end of the board-scraping conveyor belt through a set of transmission gears.

[0007] A further improvement is made to the material feeding guide assembly, which includes a side limiting plate connecting frame that spans and is installed above the stripping conveyor belt. The side limiting plate connecting frame is installed on the side frame of the stripping conveyor belt via a connecting plate. Two or three side limiting plates are installed on the bottom surface of the side limiting plate connecting frame along the conveying direction of the stripping conveyor belt. One or two guide grooves are formed between adjacent side limiting plates and the stripping conveyor belt. An inlet upper limit plate is provided above the feed end of the stripping conveyor belt. A corresponding number of upper limit extension plates are provided on the inlet upper limit plate along the direction of the guide groove.

[0008] A further improvement is that the number of the feeding components corresponds to the number of guide slots. The feeding component includes a feeding motor mounting frame installed on the feeding end of the blanking conveyor. A feeding motor is installed on the feeding motor mounting frame. The output end of the feeding motor is connected to a hexagonal star-shaped feeding impeller through a reducer. Feeding blades are installed between adjacent corners of the feeding impeller. A feeding photoelectric sensor is installed on one side of the feeding motor mounting frame.

[0009] A further improvement is made to the following: the scraper wheel mechanism includes a scraper wheel drive shaft located on one side of the scraper conveyor motor, and scraper wheels located above the discharge end of the scraper conveyor belt, corresponding to the number of guide grooves. Rubber wheels are detachably fitted onto the scraper wheels. A transmission chain wheel is mounted on the scraper wheel shaft. One end of the scraper wheel drive shaft is connected to the other end of the scraper conveyor belt roller at the discharge end of the scraper conveyor belt via a set of transmission gears. A transmission chain wheel is mounted on the other end of the scraper wheel drive shaft. The scraper wheel drive shaft and the scraper wheel shaft are driven by a transmission chain and the transmission chain wheel. Chain tension wheels are provided on both sides of the transmission chain wheel.

[0010] A further improvement is that the receiving assembly includes a receiving platform installed on the stripper frame at the discharge end of the stripper conveyor belt. The receiving platform is equipped with a stacking platform corresponding to the number of guide slots. The upper surface of the stacking platform is equipped with a bucket tooth-shaped feeding platform. A stacking support frame is provided on the outside of the feeding platform. A stacking photoelectric sensor is provided on the upper part of the stacking support frame. An alarm device is provided at the upper end of the stacking support frame. The alarm device is a three-color warning light with a buzzer.

[0011] A further improvement is made: the chipping wheel mechanism also includes a chipping wheel height adjustment assembly. The chipping wheel height adjustment assembly includes a height adjustment support frame installed on the upper surface of the front end of the receiving table. A height adjustment slide rail is vertically arranged on the side of the height adjustment support frame facing the guide groove. A matching height adjustment slider is slidably arranged on the height adjustment slide rail. A seated bearing is fixedly connected to the height adjustment slider. The chipping wheel shaft of the chipping wheel is rotatably mounted on the seated bearing. A height adjustment screw is fixedly connected to the upper end of the seated bearing. The upper end of the height adjustment screw moves through the upper end of the height adjustment support frame and is fixed by a nut. A chipping wheel spring is sleeved on the height adjustment screw portion between the seated bearing and the upper end of the height adjustment support frame.

[0012] A further improvement is made to the ejector mechanism, which further includes a tension adjustment assembly. This assembly includes a tension adjustment slide rail mounted on the bottom surface of the receiving platform along the guide groove. A matching tension adjustment slider is slidably connected to the tension adjustment slide rail. A tension wheel mounting seat is mounted on the bottom surface of the tension adjustment slider. Two chain tension wheels are rotatably mounted on the tension wheel mounting seat. A tension adjustment support block is mounted on the bottom surface of the stacking platform at one end of the tension adjustment slide rail. A tension adjustment screw is mounted on the end of the tension wheel mounting seat away from the guide groove. The other end of the tension adjustment screw moves through the tension adjustment support block. A nut is threaded onto the other end of the tension adjustment screw. A tension wheel spring is sleeved on the tension adjustment screw portion between the nut and the tension adjustment support block.

[0013] A further improvement is made in that: a pressure plate assembly corresponding to the number of guide grooves is provided between the ejector wheel mechanism and the receiving assembly. The pressure plate assembly includes a pressure plate support frame installed on one side wall of the height adjustment support frame. A tooth-shaped pressure plate is provided below the pressure plate support frame. A pressure plate connecting rod is fixedly connected to the upper surface of the pressure plate. The upper end of the pressure plate connecting rod slides upward through the pressure plate support frame. A support platform is provided at the lower part of the pressure plate connecting rod. A pressure plate spring is sleeved on the pressure plate connecting rod portion between the support platform of the pressure plate connecting rod and the inner top of the pressure plate support frame.

[0014] A further improvement is made in that: the stacking support frame on the feeding side of the feeding platform is equipped with a guide wheel assembly corresponding to the number of guide slots. The guide wheel assembly includes a guide wheel bracket installed on the stacking support frame. A guide wheel connecting rod is movably sleeved inside the guide wheel bracket. A guide wheel is connected to the lower end of the guide wheel connecting rod. A guide wheel limiting groove is opened on the upper part of one side wall of the guide wheel bracket. A guide wheel limiting block that cooperates with the guide wheel limiting groove is provided at the upper end of the guide wheel connecting rod. A guide wheel spring is provided between the upper end of the guide wheel connecting rod and the inner top surface of the guide wheel bracket.

[0015] Compared with existing technologies, the above technical solution has the following advantages:

[0016] In conjunction with the preceding detection mechanism, the detection of pencil boards is pushed onto the corresponding rejection conveyor belt by the cooperation of the feeding photoelectric sensor and the feeding component. The boards are then sorted and guided by the guide groove. The rejection conveyor belt and the rejection wheel run in opposite directions of rotation, forming a twisting force that sends the pencil boards toward the receiving component. The transmission chain of the rejection wheel is equipped with two tensioning wheels, which increases the transmission stroke and the twisting force, ensuring the delivery of the pencil boards. This results in higher rejection efficiency, better effect, and greater stability.

[0017] It is equipped with a tension adjustment component. By rotating the tension adjustment screw, the tension wheel can be moved, and the tension of the chipper wheel can be freely adjusted.

[0018] The height of the cutting wheel can be freely adjusted by the cutting wheel height adjustment screw of the cutting wheel height adjustment assembly to meet the cutting needs of pencil boards of different thicknesses.

[0019] The toothed feeding platform facilitates the loading of pencil boards to the stacking platform for stacking. It is equipped with a stacking photoelectric sensor and an alarm device to promptly remind workers to move the full stack of pencil boards, thus improving work efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a top view of the structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the feeding assembly in this invention;

[0024] Figure 4 This is a schematic diagram of the material feeding guide assembly in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the scraper conveying mechanism and the scraper wheel machine in this invention;

[0026] Figure 6 This is a schematic diagram of the transmission structure of the scraper conveying mechanism and the scraper wheel machine in this invention;

[0027] Figure 7 This is a schematic diagram of the tension adjustment component in the invention;

[0028] Figure 8 This is a schematic diagram of the structure of the chipper wheel height adjustment assembly in the invention;

[0029] Figure 9 This is a schematic diagram of the material receiving component in the invention;

[0030] Figure 10 This is a top view of the material receiving component in this invention.

[0031] Figure 11 This is a schematic diagram of the guide wheel assembly in this invention.

[0032] Explanation of reference numerals in the attached drawings: Barrel frame b1, unloading assembly b2, unloading motor b21, unloading impeller b22, unloading blade b23, unloading photoelectric sensor b24, unloading motor mounting bracket b25, unloading guide assembly b3, inlet upper limit plate b31, upper limit extension plate b32, side limit plate b33, guide groove b34, side limit plate connecting bracket b35, barrel conveying mechanism b4, barrel conveyor belt b41, barrel conveyor motor b42, transmission gear b43, barrel conveyor belt roller b44, barrel wheel mechanism b5, barrel wheel b51, rubber wheel b511, barrel wheel shaft b52, transmission chain wheel b53, transmission chain b54, chain tension wheel b55, barrel wheel drive shaft b56, receiving assembly b6, stacking platform b61, loading platform b6 2. Stacking support frame b63, stacking photoelectric sensor b64, alarm device b65, guide wheel assembly b66, guide wheel bracket b661, guide wheel connecting rod b662, guide wheel b663, guide wheel spring b664, guide wheel limiting block b665, guide wheel limiting groove b666, chipper wheel height adjustment assembly b7, bearing with seat b71, height adjustment slider b72, height adjustment slide rail b73, height adjustment support frame b74, height adjustment screw b75, pressure plate assembly b8, pressure plate support frame b81, pressure plate b82, pressure plate connecting rod b83, tension adjustment assembly b9, tension wheel mounting seat b91, tension adjustment slider b92, tension adjustment slide rail b93, tension adjustment support block b94, tension adjustment screw b95, transfer conveyor e. Detailed Implementation

[0033] See Figure 1 - Figure 11As shown, the technical solution adopted in this specific embodiment is: an automatic selection line for removing pencil boards, including a removal conveying mechanism b4 for conveying and classifying pencil boards. Above the removal conveying mechanism b4 is a feeding guide component b3 for guiding the pencil boards. On one side of the feeding end of the removal conveying mechanism b4 is a feeding component b2 for pushing the classified pencil boards onto the removal conveying mechanism b4. At the discharge end of the removal conveying mechanism b4 is a receiving component b6 for collecting and stacking the classified pencil boards. Above the discharge end of the removal conveying mechanism b4 is a removal wheel mechanism b5 that cooperates with the removal conveying mechanism b4 to convey the pencil boards to the receiving component b6. The rotation direction of the removal wheel mechanism b5 is opposite to that of the removal conveying mechanism b4, forming a winch force to send the pencil boards out.

[0034] It also includes a board-scraping frame b1, and the board-scraping conveying mechanism b4 includes a board-scraping conveyor belt b41 installed on the board-scraping frame b1 and a board-scraping conveying motor b42 installed inside the board-scraping frame b1. The output end of the board-scraping conveying motor b42 is connected to one end of the board-scraping conveyor belt roller b44 at the discharge end of the board-scraping conveyor belt b41 through a set of transmission gears b43.

[0035] The feeding guide assembly b3 includes a side limiting plate connecting frame b35 that spans and is installed above the scraper conveyor belt b41. The side limiting plate connecting frame b35 is installed on the side frame of the scraper conveyor belt b41 via a connecting plate. Two or three side limiting plates b33 are installed on the bottom surface of the side limiting plate connecting frame b35 along the conveying direction of the scraper conveyor belt b41. One or two guide grooves b34 are formed between adjacent side limiting plates b33 and the scraper conveyor belt b41. An inlet upper limit plate b31 is provided above the feed end of the scraper conveyor belt b41. A corresponding number of upper limit extension plates b32 are provided on the inlet upper limit plate b31 along the direction of the guide groove b34.

[0036] The number of feeding components b2 corresponds to the number of guide grooves b34. Each feeding component b2 includes a feeding motor mounting frame b25 installed on a scraper frame b1 on the feeding end side of the scraper conveyor belt b41. A feeding motor b21 is installed on the feeding motor mounting frame b25. The output end of the feeding motor b21 is connected to a hexagonal star-shaped feeding impeller b22 through a reducer. Feeding blades b23 are installed between adjacent corners of the feeding impeller b22. A feeding photoelectric sensor b24 is installed on one side of the feeding motor mounting frame b25.

[0037] The scraper mechanism b5 includes a scraper drive shaft b56 located on one side of the scraper conveyor motor b42, and scraper wheels b51 located above the discharge end of the scraper conveyor belt b41, corresponding to the number of guide grooves b34. Rubber wheels b511 are detachably fitted around each scraper wheel b51. A transmission chain wheel b53 is mounted on the scraper shaft b52 of the scraper wheel b51. One end of the scraper drive shaft b56 is connected to the other end of the scraper conveyor belt roller b44 at the discharge end of the scraper conveyor belt b41 via a set of transmission gears b43. The other end of the scraper drive shaft b56 is equipped with a transmission chain wheel b53. The scraper drive shaft b56 and the scraper shaft b52 are connected by a transmission chain b54 and the transmission chain wheel b53. Chain tension wheels b55 are provided on both sides of the transmission chain wheel b53.

[0038] The receiving assembly b6 includes a receiving platform installed on the stripping frame b1 at the discharge end of the stripping conveyor belt b41. The receiving platform is provided with a stacking platform b61 corresponding to the number of guide grooves b34. The upper surface of the stacking platform b61 is provided with a tooth-shaped feeding platform b62. A stacking support frame b63 is provided on the outside of the feeding platform b62. A stacking photoelectric sensor b64 is provided on the upper part of the stacking support frame b63. ​​An alarm device b65 is provided at the upper end of the stacking support frame b63. ​​The alarm device b65 is a three-color warning light with a buzzer.

[0039] The chipping wheel mechanism b5 further includes a chipping wheel height adjustment assembly b7. The chipping wheel height adjustment assembly b7 includes a height adjustment support frame b74 installed on the upper surface of the front end of the receiving table. A height adjustment slide rail b73 is vertically arranged on the side of the height adjustment support frame b74 facing the guide groove b34. A matching height adjustment slider b72 is slidably arranged on the height adjustment slide rail b73. A seated bearing b71 is fixedly connected to the height adjustment slider b72. The chipping wheel shaft b52 of the chipping wheel b51 is rotatably mounted on the seated bearing b71. A height adjustment screw b75 is fixedly connected to the upper end of the seated bearing b71. The upper end of the height adjustment screw b75 moves through the upper end of the height adjustment support frame b74 and is fixed by a nut. A chipping wheel spring is sleeved on the part of the height adjustment screw b75 between the seated bearing b71 and the upper end of the height adjustment support frame b74.

[0040] The ejector mechanism b5 further includes a tension adjustment component b9. The tension adjustment component b9 includes a tension adjustment slide rail b93 mounted on the bottom surface of the receiving platform along the guide groove b34. A matching tension adjustment slider b92 is slidably connected to the tension adjustment slide rail b93. A tension wheel mounting seat b91 is mounted on the bottom surface of the tension adjustment slider b92. Two chain tension wheels b55 are rotatably mounted on the tension wheel mounting seat b91. The tension adjustment... A tension adjustment support block b94 is installed on the bottom surface of the stacking platform b61 at one end of the slide rail b93. A tension adjustment screw b95 is installed at the end of the tension wheel mounting seat b91 away from the guide groove b34. The other end of the tension adjustment screw b95 moves through the tension adjustment support block b94. A nut is threaded to the other end of the tension adjustment screw b95. A tension wheel spring b96 is sleeved on the tension adjustment screw b95 portion between the nut and the tension adjustment support block b94.

[0041] Among them, a pressure plate assembly b8 corresponding to the number of guide grooves b34 is provided between the ejector wheel mechanism b5 and the receiving assembly b6. The pressure plate assembly b8 includes a pressure plate support frame b81 installed on one side wall of the height adjustment support frame b74. A tooth-shaped pressure plate b82 is provided below the pressure plate support frame b81. A pressure plate connecting rod b83 is fixedly connected to the upper surface of the pressure plate b82. The upper end of the pressure plate connecting rod b83 slides upward through the pressure plate support frame b81. A support platform is provided at the lower part of the pressure plate connecting rod b83. A pressure plate spring is sleeved on the part of the pressure plate connecting rod b83 between the support platform of the pressure plate connecting rod b83 and the top of the inner part of the pressure plate support frame b81.

[0042] The feeding side of the loading platform b62 is provided with a stacking support frame b63, which is equipped with a guide wheel assembly b66 corresponding to the number of guide grooves b34. The guide wheel assembly b66 includes a guide wheel bracket b661 installed on the stacking support frame b63. ​​A guide wheel connecting rod b662 is movably sleeved inside the guide wheel bracket b661. The lower end of the guide wheel connecting rod b662 is connected to the guide wheel b663. A guide wheel limiting groove b666 is opened on the upper part of one side wall of the guide wheel bracket b661. A guide wheel limiting block b665 that cooperates with the guide wheel limiting groove b666 is provided on the upper end of the guide wheel connecting rod b662. A guide wheel spring b664 is provided between the upper end of the guide wheel connecting rod b662 and the inner top surface of the guide wheel bracket b661.

[0043] The working principle of this invention is as follows: After detection, the pencil moves from the transfer conveyor towards the feeding assembly. Upon passing the feeding photoelectric sensor, the feeding motor drives the blades on the impeller to rotate, pushing the pencil board onto the scraper conveyor belt. Through the limiting and guiding of the upper plate and guide groove of the feeding guide assembly, the pencil board moves towards the scraper wheel mechanism on the scraper conveyor belt. The scraper conveyor belt and scraper wheel are driven by the scraper conveyor motor to run in opposite directions, creating a winch force that sends the pencil board towards the receiving assembly. The drive chain of the scraper wheel is equipped with two tensioning pulleys, increasing the transmission stroke and resulting in a greater winch force, ensuring... The pencil board feeding process is equipped with a tension adjustment component. By rotating the tension adjustment screw, the tension wheel can be moved, allowing for free adjustment of the tension of the cutting wheel. The height of the cutting wheel can also be adjusted using the cutting wheel height adjustment screw of the cutting wheel height adjustment component to meet the cutting requirements of pencil boards of different thicknesses. The fed pencil boards are guided towards the stacking platform by the pressure plate assembly and guide wheel assembly. The bucket tooth-shaped feeding platform facilitates the loading of pencil boards onto the stacking platform. When the pencil boards are stacked to the point where the photoelectric sensor stops the stacking, an alarm device prompts the staff to remove the stacked pencil boards, and then the cutting and stacking process continues.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents. Any aspects not detailed in the present invention are well-known to those skilled in the art.

Claims

1. An automatic board sorting and rejection machine, characterized in that: The device includes a slat conveyor for transporting sorted pencil boards. Above the slat conveyor is a feeding guide assembly for guiding the pencil boards during transport. On one side of the feeding end of the slat conveyor is a feeding assembly for pushing the sorted pencil boards onto the slat conveyor. At the discharge end of the slat conveyor is a receiving assembly for collecting and stacking the sorted pencil boards. Above the discharge end of the slat conveyor is a slat wheel mechanism that works with the slat conveyor to transport the pencil boards to the receiving assembly. The slat wheel mechanism rotates in the opposite direction to the slat conveyor, creating a winching force to send the pencil boards out.

2. The automatic board selection and rejection machine according to claim 1, characterized in that: It also includes a board-scraping frame, and the board-scraping conveying mechanism includes a board-scraping conveyor belt installed on the board-scraping frame and a board-scraping conveying motor installed inside the board-scraping frame. The output end of the board-scraping conveying motor is connected to one end of the board-scraping conveyor belt roller at the discharge end of the board-scraping conveyor belt through a set of transmission gears.

3. The automatic board selection and rejection machine according to claim 2, characterized in that: The feeding guide assembly includes a side limiting plate connecting frame that spans and is installed above the stripping conveyor belt. The side limiting plate connecting frame is installed on the side frame of the stripping conveyor belt via connecting plates. Two or three side limiting plates are installed on the bottom surface of the side limiting plate connecting frame along the conveying direction of the stripping conveyor belt. One or two guide grooves are formed between adjacent side limiting plates and the stripping conveyor belt. An inlet upper limit plate is provided above the feed end of the stripping conveyor belt. A corresponding number of upper limit extension plates are provided on the inlet upper limit plate along the direction of the guide groove.

4. The automatic board selection and rejection machine according to claim 3, characterized in that: The number of feeding components corresponds to the number of guide grooves. The feeding component includes a feeding motor mounting frame installed on the feeding end of the blanking conveyor. A feeding motor is installed on the feeding motor mounting frame. The output end of the feeding motor is connected to a hexagonal star-shaped feeding impeller through a reducer. Feeding blades are installed between adjacent corners of the feeding impeller. A feeding photoelectric sensor is installed on one side of the feeding motor mounting frame.

5. The automatic board selection and rejection machine according to claim 4, characterized in that: The scraper mechanism includes a scraper drive shaft located on one side of the scraper conveyor motor, and scraper wheels located above the discharge end of the scraper conveyor belt, corresponding to the number of guide grooves. Rubber wheels are detachably fitted onto the scraper wheels. A transmission chain wheel is mounted on the scraper wheel shaft. One end of the scraper drive shaft is connected to the other end of the scraper conveyor belt roller at the discharge end of the scraper conveyor belt via a set of transmission gears. A transmission chain wheel is mounted on the other end of the scraper drive shaft. Transmission between the scraper drive shaft and the scraper wheel shaft occurs through the cooperation of a transmission chain and the transmission chain wheel. Chain tension wheels are provided on both sides of the transmission chain wheel.

6. The automatic board selection and rejection machine according to claim 5, characterized in that: The receiving assembly includes a receiving platform installed on the stripping machine frame at the discharge end of the stripping conveyor belt. The receiving platform is equipped with a stacking platform corresponding to the number of guide slots. The upper surface of the stacking platform is equipped with a bucket tooth-shaped feeding platform. A stacking support frame is provided on the outside of the feeding platform. A stacking photoelectric sensor is provided on the upper part of the stacking support frame. An alarm device is provided at the upper end of the stacking support frame. The alarm device is a three-color warning light with a buzzer.

7. The automatic board selection and rejection machine according to claim 6, characterized in that: The chipping wheel mechanism also includes a chipping wheel height adjustment assembly. The chipping wheel height adjustment assembly includes a height adjustment support frame installed on the upper surface of the front end of the receiving table. A height adjustment slide rail is vertically arranged on the side of the height adjustment support frame facing the guide groove. A matching height adjustment slider is slidably arranged on the height adjustment slide rail. A seated bearing is fixedly connected to the height adjustment slider. The chipping wheel shaft of the chipping wheel is rotatably mounted on the seated bearing. A height adjustment screw is fixedly connected to the upper end of the seated bearing. The upper end of the height adjustment screw moves through the upper end of the height adjustment support frame and is fixed by a nut. A chipping wheel spring is sleeved on the height adjustment screw portion between the seated bearing and the upper end of the height adjustment support frame.

8. The automatic board selection and rejection machine according to claim 7, characterized in that: The ejector mechanism further includes a tension adjustment assembly, which includes a tension adjustment slide rail mounted on the bottom surface of the receiving platform along the direction of the guide groove. A matching tension adjustment slider is slidably connected to the tension adjustment slide rail. A tension wheel mounting seat is mounted on the bottom surface of the tension adjustment slider. Two chain tension wheels are rotatably mounted on the tension wheel mounting seat. A tension adjustment support block is mounted on the bottom surface of the stacking platform at one end of the tension adjustment slide rail. A tension adjustment screw is mounted on the end of the tension wheel mounting seat away from the guide groove. The other end of the tension adjustment screw moves through the tension adjustment support block. A nut is threaded to the other end of the tension adjustment screw. A tension wheel spring is sleeved on the tension adjustment screw portion between the nut and the tension adjustment support block.

9. The automatic board selection and rejection machine according to claim 8, characterized in that: A pressure plate assembly corresponding to the number of guide grooves is provided between the ejector wheel mechanism and the receiving assembly. The pressure plate assembly includes a pressure plate support frame installed on one side wall of the height adjustment support frame. A tooth-shaped pressure plate is provided below the pressure plate support frame. A pressure plate connecting rod is fixedly connected to the upper surface of the pressure plate. The upper end of the pressure plate connecting rod slides upward through the pressure plate support frame. A support platform is provided at the lower part of the pressure plate connecting rod. A pressure plate spring is sleeved on the pressure plate connecting rod portion between the support platform of the pressure plate connecting rod and the inner top of the pressure plate support frame.

10. The automatic board selection and rejection machine according to claim 9, characterized in that: The feeding side of the feeding platform is equipped with a stacking support frame with a number of guide wheel assemblies corresponding to the number of guide slots. The guide wheel assembly includes a guide wheel bracket installed on the stacking support frame. A guide wheel connecting rod is movably sleeved inside the guide wheel bracket. A guide wheel is connected to the lower end of the guide wheel connecting rod. A guide wheel limiting groove is opened on the upper part of one side wall of the guide wheel bracket. A guide wheel limiting block that cooperates with the guide wheel limiting groove is provided at the upper end of the guide wheel connecting rod. A guide wheel spring is provided between the upper end of the guide wheel connecting rod and the inner top surface of the guide wheel bracket.

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