Automatic tray conveying device

Abstract

The utility model discloses an automatic tray conveying device which is characterized in that a tray feeding roller way is driven by a feeding roller way driving motor I and a feeding roller way driving motor II; the movable frame is installed on the fixed frame and can vertically slide up and down along a left stand column and a right stand column of the fixed frame. The gear shaft driving motor drives the gear shaft to rotate and drives the movable frame to vertically slide up and down; the lower moving slide rail pair is mounted on two sides of a lower cross beam of the moving frame; the upper moving slide rail pair is mounted on two sides of the upper cross beam of the moving frame; the screw shaft driving motor drives the lifting support plate to translate; the tray lifting mechanism comprises a left tray lifting mechanism and a right tray lifting mechanism and is mounted on the lifting support plate; the air cylinder is fixed to the outer side of the lifting supporting plate and drives the small supporting plate to stretch out and retract back. The tray positioning plate is fixed between the lower cross beam and the upper cross beam of the movable frame; the tray sending-out roller way is driven by a sending-out roller way driving motor; and the tray pushing mechanism pushes the positioned and stopped trays to a collecting and stacking position through a tray pushing plate.

Description

Technical Field

[0001] This utility model relates to the printing field, and in particular to an automatic pallet conveying device for printing machinery, automatic die-cutting machines, and automatic hot stamping die-cutting machines, etc., for single-sheet paper conveying. Background Technology

[0002] Printing machinery and equipment that uses sheet-fed printing presses, automatic die-cutting machines, and automatic hot stamping and die-cutting machines, such as... Figure 1 As shown, in the paper receiving section of printing machinery, empty pallets need to be placed to collect and stack finished paper after processing. Once a certain amount of finished paper has been stacked on the receiving pallet, it needs to be moved out of the receiving section and replaced with a new pallet to continue collecting finished paper. Currently, placing empty receiving pallets into the receiving section generally requires manual operation. There are also methods using circulating roller conveyors to transport individual pallets, but this is limited by the working environment and cannot directly deliver empty pallets from the logistics conveyor rollers into the receiving section or the stacking location. This is applicable to other equipment that requires the use of pallets to collect and stack items, such as... Figure 2 As shown, the automatic pallet conveying device it uses can only convey empty pallets one at a time, which affects its work efficiency to some extent. Utility Model Content

[0003] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] The technical problem to be solved by this utility model is to provide an automatic pallet conveying device that can be used independently for collecting pallets of various cardboard, paper or materials, and can improve the working efficiency of equipment (automatic die-cutting machine, automatic hot stamping die-cutting machine or other equipment that uses pallets).

[0005] To solve the above-mentioned technical problems, the present invention provides an automatic pallet conveying device, comprising:

[0006] The pallet feeding roller conveyor 3-29 is driven by the feeding roller conveyor drive motor I3-30 and the feeding roller conveyor drive motor II3-36, and is used to transport a single pallet 3-19 or stacked pallets 3-46;

[0007] The fixed frame 3-26 is formed by the left column 3-1, the right column 3-12, the upper crossbeam 3-11 of the fixed frame, and the lower crossbeam 3-40 of the fixed frame.

[0008] The movable frame is mounted on the fixed frame 3-26 via the movable frame slide rail 3-14, and can slide vertically up and down along the left column 3-1 and right column 3-12 of the fixed frame.

[0009] The gear shaft drive motor 3-42 drives the gear shaft 3-25 to rotate, and through the meshing of gear 3-24 and rack 3-23, it drives the moving frame to slide vertically up and down.

[0010] The lower sliding rail 3-39 is installed on both sides of the lower crossbeam 3-41 of the moving frame to support the lifting support plates 3-4 on the left and right sides;

[0011] Upper sliding rail 3-5: Installed on both sides of the upper crossbeam 3-10 of the moving frame to support the lifting support plates 3-4 on the left and right sides;

[0012] The screw shaft drive motor 3-9 drives the left and right spiral screw shafts 3-6 to rotate, which in turn drives the lifting support plate 3-4 to move horizontally via the left spiral nut 3-3 and the right spiral nut 3-13.

[0013] The pallet lifting mechanism includes a left pallet lifting mechanism 3-45 and a right pallet lifting mechanism 3-44, which are mounted on the lifting support plate 3-4 and are used to lift and separate stacked pallets.

[0014] Cylinder 3-35 is fixed to the outside of lifting support plate 3-4, driving small pallet 3-34 to extend and retract, assisting in pallet separation;

[0015] The pallet positioning plate 3-8 is fixed in the middle position between the lower crossbeam 3-41 and the upper crossbeam 3-10 of the movable frame, and is used to position the front face of the pallet.

[0016] The pallet delivery roller conveyor 3-20 is driven by the delivery roller conveyor drive motor 3-22 and is used to transport the pallet 3-19 to the designated position.

[0017] The pallet pushing mechanism 3-17 pushes the positioned and stopped pallet 3-19 to the collection and stacking position via the pallet pushing plate 3-18.

[0018] In a further improvement to the aforementioned automatic pallet conveying device, multiple rollers 3-21 are arranged on the pallet feeding roller conveyor 3-29 on the side near the pallet positioning plate 3-8 and are driven by the feeding roller conveyor drive motor I3-30 and the feeding roller conveyor drive motor II3-36, respectively.

[0019] A further improvement to the aforementioned automatic pallet conveying device is that the fixed frame 3-26 is formed into a rectangular frame.

[0020] In a further improvement to the automatic pallet conveying device, a sliding rail of a movable frame slide rail 3-14 is vertically fixedly installed on the left column 3-1 and right column 3-12 of the fixed frame 3-26, facing the pallet feeding roller conveyor 3-29. Multiple sliding seats are provided on the symmetrically installed movable frame slide rail 3-14, and the sliding seats are fixedly connected to the movable frame columns 3-15 on both sides of the movable frame.

[0021] The movable frame is a rectangular frame consisting of the upper horizontal beam 3-10, the lower horizontal beam 3-41, and the left and right movable frame columns 3-15.

[0022] A further improvement to the aforementioned automatic pallet conveying device is that a lower moving slide rail 3-39 is fixedly installed on the left and right sides of the surface of the lower crossbeam 3-41 facing the pallet feeding roller 3-29.

[0023] Multiple slide blocks are provided on the symmetrically installed lower sliding rails 3-39; the multiple slide blocks on the left side are fixedly installed on the lower part of the end panel of the left lifting support plate 3-4, and the multiple slide blocks on the right side are fixedly installed on the lower part of the end panel of the right lifting support plate 3-4.

[0024] On the left and right sides of the upper surface of the upper beam 3-10 of the movable frame, a slide rail of upper movable slide rail 3-5 is fixedly installed; multiple slide seats are provided on the symmetrically installed upper movable slide rail 3-5; multiple slide seats on the left side are fixedly installed on the lower surface of the top plate of the left lifting support plate 3-4, and multiple slide seats on the right side are fixedly installed on the lower surface of the top plate of the right lifting support plate 3-4.

[0025] In a further improvement to the automatic pallet conveying device, two screw shaft supports 3-7 are fixedly installed at the center-symmetrical positions on the upper surface of the crossbeam 3-10 of the moving frame, respectively, to support the left and right rotating screw shafts 3-6.

[0026] On the upper surface of the top plate of the lifting support plate 3-4 on the left and right sides, a nut support 3-2 is fixedly installed respectively. A left-handed nut 3-3 is fixedly installed on the nut support 3-2 on the left side, and a right-handed nut 3-13 is fixedly installed on the nut support 3-2 on the right side.

[0027] The left-hand screw of the left-hand screw shaft 3-6 passes through the left-hand nut 3-3, and the right-hand screw passes through the right-hand nut 3-13;

[0028] A further improvement to the aforementioned automatic pallet conveying device is that a left pallet lifting mechanism 3-45 is fixedly installed on the inner side of the left lifting support plate 3-4.

[0029] A right pallet lifting mechanism 3-44 is fixedly installed on the inner side of the right lifting support plate 3-4.

[0030] The left pallet lifting mechanism 3-45 is supported by four fixed shafts 3-32 and installed on the inner side of the side plate of the left lifting support plate 3-4. One end of the four fixed shafts 3-32 is fixedly installed on the four corners of the pallet lifting mechanism fixing plate 3-31, and the other end is fixedly installed on the inner side of the side plate of the left lifting support plate 3-4.

[0031] The right pallet lifting mechanism 3-44 is supported by four fixed shafts 3-32 and installed on the inner side of the side plate of the right lifting support plate 3-4. One end of the four fixed shafts 3-32 is fixedly installed on the four corners of the pallet lifting mechanism fixing plate 3-31, and the other end is fixedly installed on the inner side of the side plate of the right lifting support plate 3-4.

[0032] On the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44, there is a small pallet drive crossbar 3-38 supported by two linear bearings 3-43 and mounted on two parallel fixed shafts 3-32 at the bottom, which can slide along the two fixed shafts 3-32;

[0033] On the upper surface of the small pallet drive crossbar 3-38, a small pallet slide rail 3-33 is symmetrically fixed and installed, and a small pallet 3-34 is fixed on the slide seat of the small pallet slide rail 3-33.

[0034] The small tray 3-34 can move along the slide rail to adjust its position, and can be fastened to the adjusted position by the small tray locking knob 3-37;

[0035] Cylinder 3-35 is fixedly installed on the outer side of the side plate of the left and right lifting support plate 3-4, and the push rod of cylinder 3-35 is fixedly connected to the middle part of the small support plate drive crossbar 3-38.

[0036] A further improvement to the aforementioned automatic pallet conveying device is that a pallet positioning plate 3-8 is fixedly installed at the middle position of the lower crossbeam 3-41 and the upper crossbeam 3-10 of the moving frame facing the pallet feeding roller 3-29. The lower edge of the pallet positioning plate 3-8 is flush with the lower surface of the lower crossbeam 3-41 of the moving frame.

[0037] On the right side of the fixed frame 3-26, along the conveying direction of the pallet 3-19, a pallet delivery roller conveyor 3-20 is fixedly installed. Between the two side wall panels of the pallet delivery roller conveyor 3-20, multiple rollers 3-21 are installed in parallel, and the upper cutting planes of the multiple rollers 3-21 are located on the same plane.

[0038] Roller 3-21 is driven by feed roller drive motor 3-22. As feed roller drive motor 3-22 drives several rollers 3-21 to rotate, it can position and transport individual trays 3-19 and stop them at the tray 3-19 pushing position.

[0039] The pallet pushing mechanism 3-17 is fixed to the pushing position on the side of the pallet delivery roller conveyor 3-20 via the pallet pushing mechanism support 3-16. Through the pallet pushing plate 3-18, the pallet 3-19 that has been positioned and stopped can be transported to the paper receiving or finished product receiving table for collecting stacked printed paper; or the pallet 3-19 can be transported to the position where other equipment uses pallets to collect stacked items.

[0040] The working principle of this utility model is as follows;

[0041] During operation, the structural parameters of the pallet 3-19 to be transported are pre-input into the computer control system of the automatic pallet conveyor. Based on the structure of the pallet 3-19 being transported, the opening positions of the small pallets 3-34 on the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44 are manually adjusted and locked beforehand, ensuring that the small pallets 3-34 align with the open positions of the pallet 3-19 structure. Based on the detection of the automatic pallet conveyor, it can automatically set the working mode to determine whether the pallet 3-19 being transported from the workshop logistics system to the pallet feeding roller conveyor 3-29 is a single pallet 3-19 or a stack of pallets 3-46. Simultaneously, the automatic pallet conveyor can adjust the conveying speed of the pallets 3-19 according to the production speed and cycle time of the machines that need to transport them, ensuring that the pallet 3-19 is delivered precisely when the machines need to replace it.

[0042] When the workshop logistics system, other transport vehicles, or manual labor transports a single pallet 3-19 onto the pallet feeding roller conveyor 3-29, the feeding roller conveyor drive motors I 3-30 and II 3-36 drive several rollers 3-21 to rotate, conveying the pallet 3-19 to the front end of the pallet positioning plate 3-8 for positioning. Based on the production cycle of the pallet 3-19 being transported to the work position, the gear shaft drive motor 3-42 drives the gear 3-24 to rotate, lifting the moving frame upwards along the fixed frame 3-26, allowing the pallet 3-19 to pass just below the pallet positioning plate 3-8. Driven by the feeding roller conveyor drive motors II 3-36 and III 3-22, the pallet 3-19 is delivered onto the pallet output roller conveyor 3-20 and stops at the appropriate position. At the start of the next production cycle, pallet 3-19 is positioned and conveyed under the drive of the delivery roller drive motor 3-22 and stops at the pallet 3-19 push position. The pallet pusher 3-18 pushes out, conveying pallet 3-19, which is stopped at the push position, to the paper receiving table or finished product receiving table for collecting stacked printed paper; or to the location where other equipment uses pallets to collect stacked items.

[0043] When the workshop logistics system or other transportation vehicles transport a stack of pallets 3-46 onto the pallet feeding roller conveyor 3-29, the automatic pallet conveying device automatically switches its working mode. Based on pre-input pallet structure parameters, the control system controls the screw shaft drive motor 3-9 to drive the left and right rotating screw shafts 3-6 to rotate. This, through the left-hand nut 3-3 and right-hand nut 3-13, causes the left and right lifting support plates 3-4 to synchronously translate inward or outward relative to the center plane of the fixed frame. This positions the fixing plates 3-31 of the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44 close to the sides of the pallet 3-19. Simultaneously, the control system controls the gear shaft drive motor 3-42 to drive the gear 3-24 to rotate, causing the moving frame, carrying the fixed pallet positioning plate 3-8, to move downward along the fixed frame 3-26 to its lowest position. As the feed roller drive motor I 3-30 and feed roller drive motor II 3-36 drive several rollers 3-21 to rotate, the stacked pallets 3-46 are transported to the front end of the pallet positioning plate 3-8 for positioning.

[0044] After the front end of the stacked pallets 3-46 is positioned by the pallet positioning plate 3-8, under the control of the control system, the gear shaft drive motor 3-42 drives the gear 3-24 to rotate, lifting the moving frame and the left and right lifting support plates 3-4 upwards and stopping at the position of the second pallet 2-19 (counting from bottom to top). At this time, the cylinder 3-35 push rods of the left and right pallet lifting mechanisms 3-45 and 3-44 extend, pushing the small trays 3-34 on the left and right sides out of the fixing plate 3-31 and inserting them into the gaps in the structure of pallet 2-19. Afterwards, the gear shaft drive motor 3-42 continues to drive the gear 3-24 to rotate, lifting the moving frame and the left and right lifting support plates 3-4 upwards, and driving the small trays 3-34 inserted in the gaps in the structure of pallet 2-19, lifting the second pallet 2-19 (counting from bottom to top) and the stacked pallets 3-46 above it, separating the first pallet 3-19 from the stacked pallets 3-46. Driven by the infeed roller drive motor II 3-36 and the outfeed roller drive motor 3-22, the pallet 3-19, separated from the stacked pallets 3-46, is sent to the pallet outfeed roller 3-20 and stops in the appropriate position.

[0045] After pallet 3-19 is delivered from the front end of pallet positioning plate 3-8 onto pallet delivery roller 3-20, under the control of the control system, gear shaft drive motor 3-42 drives gear 3-24 to rotate, moving the moving frame and left and right lifting support plates 3-4 downwards to the lowest position, causing the stacked pallets 3-46 supported on small pallet plates 3-34 to fall onto pallet delivery roller 3-29. Afterwards, the cylinders 3-35 of the left and right pallet lifting mechanisms 3-45 and 3-44 retract, causing the small pallet plates 3-34 to exit the gap in the pallet 2-19 structure and return to their initial position. Following the production speed and cycle time of the machine that needs to transport pallets 3-19, the next cycle begins at the start of the next production cycle.

[0046] At the start of the next production cycle, the delivery roller drive motor 3-22 drives the 3-21 roller of the pallet delivery roller 3-20 to rotate, positioning and conveying the pallet 3-19 and stopping it at the pallet 3-19 push position. According to the production cycle of the machine, when the pallet is needed, the pallet push plate 3-18 of the pallet push mechanism 3-17 pushes out, pushing the pallet 3-19 stopped at the push position to the work position for collecting and stacking printed paper or other items that are collected and stacked using pallets.

[0047] This utility model comprises an automatic conveying device for receiving paper trays or pallets used for stacking other items in an automatic hot stamping and die-cutting machine, consisting of a pallet feeding roller conveyor, a stacking pallet separating mechanism, a pallet discharging roller conveyor, and a pallet pushing mechanism. It can be connected to an automated logistics system in the workshop, which is conducive to the automation and intelligent management of logistics in the production process. It can effectively save auxiliary work time, improve the working efficiency of automatic die-cutting machines, automatic hot stamping and die-cutting machines, or other equipment that uses pallets, and reduce the labor intensity of operators. Attached Figure Description

[0048] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0049] Figure 1 This is a schematic diagram of the existing technology structure. Figure 1 .

[0050] Figure 2 This is a schematic diagram of the existing technology structure. Figure 2 .

[0051] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0052] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0053] Figure 5 This is a schematic diagram of the structure of this utility model. Figure 3 .

[0054] Figure 6 This is a schematic diagram of the structure of this utility model. Figure 4 .

[0055] Explanation of reference numerals in the attached figures

[0056] 1-1 Paper receiving unit, 1-2 Finished paper stack, 1-3 Paper receiving table, 1-4 Automatic paper feeding unit, 1-5 Paper feeding table drive motor, 1-6 Stacked paper stack, 1-7 Paper feeding table;

[0057] 2-1 Stacked products, 2-2 Stacking platform drive motor, 2-3 Product stacking component, 2-4 Stacking platform, 2-5 Pallet positioning and conveying component, 2-6 Empty pallet, 2-7 Pallet conveying roller conveyor;

[0058] 3-1 Left upright, 3-2 Nut support, 3-3 Left-handed nut, 3-4 Lifting support plate, 3-5 Upper moving slide rail assembly, 3-6 Left-handed and right-handed screw shaft, 3-7 Screw shaft support, 3-8 Pallet positioning plate, 3-9 Screw shaft drive motor, 3-10 Upper crossbeam of moving frame, 3-11 Upper crossbeam of fixed frame, 3-12 Right upright, 3-13 Right-handed nut, 3-14 Moving frame slide rail assembly, 3-15 Moving frame upright, 3-16 Pallet pushing mechanism support, 3-17 Pallet pushing mechanism, 3-18 Pallet pushing plate, 3-19 Pallet, 3-20 Pallet delivery roller conveyor, 3-21 Roller, 3-22 Delivery roller conveyor drive motor, 3-23 Rack, 3-24 Gear, 3-25 Gear drive 3-26 Moving shaft, 3-27 Fixed frame, 3-27 Left and right turn nuts, 3-28 Gear drive shaft support, 3-29 Pallet feeding roller conveyor, 3-30 Feeding roller conveyor drive motor I, 3-31 Pallet lifting mechanism fixing plate, 3-32 Fixed shaft, 3-33 Small pallet slide rail assembly, 3-34 Small pallet, 3-35 Cylinder, 3-36 Feeding roller conveyor drive motor II, 3-37 Small pallet locking knob, 3-38 Small pallet drive crossbar, 3-39 Lower moving slide rail assembly, 3-40 Fixed frame lower crossbeam, 3-41 Moving frame lower crossbeam, 3-42 Gear shaft drive motor, 3-43 Linear bearing, 3-44 Right side pallet lifting mechanism, 3-45 Left side pallet lifting mechanism, 3-46 Stacked pallets. Detailed Implementation

[0059] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0060] refer to Figures 3 to 6 As shown, the automatic pallet conveying device provided by this utility model includes:

[0061] Individual pallets 3-19 or stacked pallets 3-46 are conveyed by a logistics system or other transport vehicle onto rollers 3-21 of the pallet feeding roller conveyor 3-29. Several rollers 3-21 are installed parallel to each other between the side walls of the pallet feeding roller conveyor 3-29, with their upper tangent planes lying on the same plane. A portion of the rollers 3-21 at the front along the pallet conveying direction are driven by feeding roller conveyor drive motor II 3-36, while the other half of the rollers 3-21 are driven by feeding roller conveyor drive motor I 3-30.

[0062] Along the pallet conveying direction, on the left side of the pallet feeding roller conveyor 3-29, a fixed frame 3-26 is fixedly installed. The fixed frame 3-26 is formed by connecting the left upright 3-1, the right upright 3-12, the upper crossbeam 3-11, and the lower crossbeam 3-40, creating a rectangular frame. Symmetrically positioned on the left and right uprights of the fixed frame 3-26, facing the pallet feeding roller conveyor 3-29, are vertically fixed slide rails 3-14 for the movable frame. Each of the symmetrically installed slide rails 3-14 has several sliding seats, which are fixedly connected to the movable frame uprights 3-15 on the left and right sides of the movable frame. The movable frame is formed by connecting the upper crossbeam 3-10, the lower crossbeam 3-41, and the left and right uprights 3-15, creating a rectangular frame. The movable frame can slide vertically up and down along the left and right columns 3-12 of the fixed frame 3-26 via the movable frame slide rail 3-14. At symmetrical positions on the left and right columns 3-12 of the fixed frame 3-26, facing the pallet feeding roller conveyor 3-29, a rack 3-23 is vertically fixedly installed on the inner side of the movable frame slide rail 3-14 on both the left and right sides. A gear shaft drive motor 3-42 is fixedly installed at the middle position of the upper surface of the lower crossbeam 3-41 of the movable frame. A gear drive shaft 3-25 passes through the output shaft hole of the gearbox of the gear shaft drive motor 3-42 and is fixedly connected to the output shaft hole. Gear drive shaft supports 3-28 are fixedly installed on the left and right sides of the upper surface of the lower crossbeam 3-41 of the movable frame, supporting the gear drive shaft 3-25 on the upper surface of the lower crossbeam 3-41 of the movable frame. A gear 3-24 is fixedly installed at the left and right ends of the gear drive shaft 3-25, respectively. Gear 3-24 and rack 3-23 mesh to form a gear pair. When the gear shaft drive motor 3-42 drives the gear shaft 3-25 to rotate, the meshing of gear 3-24 and rack 3-23, which are fixed to the left and right ends of the gear drive shaft 3-25, can drive the moving frame to slide vertically up and down along the fixed frame 3-26.

[0063] On the left and right sides of the surface of the lower crossbeam 3-41 of the movable frame facing the pallet feeding roller conveyor 3-29, a lower moving slide rail 3-39 is fixedly installed. Several sliding blocks are mounted on the symmetrically installed lower moving slide rail 3-39. Several sliding blocks on the left side are fixedly installed on the lower part of the end panel of the left lifting support plate 3-4, and several sliding blocks on the right side are fixedly installed on the lower part of the end panel of the right lifting support plate 3-4 (see view AA). On the left and right sides of the upper surface of the upper crossbeam 3-10 of the movable frame, an upper moving slide rail 3-5 is fixedly installed. Several sliding blocks are mounted on the symmetrically installed upper moving slide rail 3-5. Several sliding blocks on the left side are fixedly installed on the lower surface of the top plate of the left lifting support plate 3-4, and several sliding blocks on the right side are fixedly installed on the lower surface of the top plate of the right lifting support plate 3-4. A screw shaft drive motor 3-9 is fixedly installed at the middle position of the upper surface of the crossbeam 3-10 on the moving frame. A left-handed screw shaft 3-6 passes through the output shaft hole of the gearbox of the screw shaft drive motor 3-9 and is fixedly connected to the output shaft hole. Two screw shaft supports 3-7 are fixedly installed at symmetrical positions on the upper surface of the crossbeam 3-10 on the moving frame to support the left-handed screw shaft 3-6. A nut support 3-2 is fixedly installed on the upper surface of the top plate of the left and right lifting support plates 3-4, respectively. A left-handed nut 3-3 is fixedly installed on the nut support 3-2 on the left side, and a right-handed nut 3-13 is fixedly installed on the nut support 3-2 on the right side. The left-handed screw of the left-handed screw shaft 3-6 passes through the left-handed nut 3-3, and the right-handed screw passes through the right-handed nut 3-13. When the screw shaft drive motor 3-9 drives the left and right screw shafts 3-6 to rotate forward or reverse, the left-hand nut 3-3 and the right-hand nut 3-13 can drive the left and right lifting support plates 3-4 to move synchronously inward or outward relative to the center plane of the fixed frame.

[0064] A left pallet lifting mechanism 3-45 is fixedly installed on the inner side of the left lifting support plate 3-4, and a right pallet lifting mechanism 3-44 is fixedly installed on the inner side of the right lifting support plate 3-4 (see BB view). The left pallet lifting mechanism 3-45 is supported by four fixed shafts 3-32 on the inner side of the left lifting support plate 3-4. One end of each fixed shaft 3-32 is fixed to one of the four corners of the pallet lifting mechanism fixing plate 3-31, and the other end is fixed to the inner side of the left lifting support plate 3-4. Similarly, the right pallet lifting mechanism 3-44 is supported by four fixed shafts 3-32 on the inner side of the right lifting support plate 3-4. One end of each fixed shaft 3-32 is fixed to one of the four corners of the pallet lifting mechanism fixing plate 3-31, and the other end is fixed to the inner side of the right lifting support plate 3-4. On the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44, a small pallet drive crossbar 3-38 is supported by two linear bearings 3-43 and mounted on two parallel fixed shafts 3-32 at the bottom, and can slide along the two fixed shafts 3-32. On the upper surface of the small pallet drive crossbar 3-38, a small pallet slide rail 3-33 is symmetrically fixedly mounted, and a small pallet 3-34 is fixedly mounted on the slide seat of the small pallet slide rail 3-33. The small pallet 3-34 can move and adjust its position along the slide rail and can be fastened to the adjusted position by the small pallet locking knob 3-37. A cylinder 3-35 is fixedly mounted on the outer side surface of the side plates of the left and right lifting support plates 3-4. The push rod of cylinder 3-35 is fixed to the middle part of the small pallet drive crossbar 3-38. When the push rod of cylinder 3-35 extends, it can push the small pallet drive crossbar 3-38 forward along the fixed shaft 3-32, and drive the small pallet 3-34 to extend out of the pallet lifting mechanism fixing plate 3-31. The initial position of the push rod of cylinder 3-35 is in the retracted position.

[0065] A pallet positioning plate 3-8 is fixedly installed at the midpoint between the lower crossbeam 3-41 and the upper crossbeam 3-10 of the moving frame, facing the pallet feeding roller conveyor 3-29. The lower edge of the pallet positioning plate 3-8 is flush with the lower surface of the lower crossbeam 3-41 of the moving frame. The pallet positioning plate 3-8 is used for positioning the front end face of the pallet.

[0066] On the right side of the fixed frame 3-26, along the conveying direction of the pallet 3-19, a pallet delivery roller conveyor 3-20 is fixedly installed. Between the two side wall panels of the pallet delivery roller conveyor 3-20, several rollers 3-21 are installed parallel to each other, with their upper tangent planes on the same plane. The rollers 3-21 are driven by a delivery roller conveyor drive motor 3-22. As the delivery roller conveyor drive motor 3-22 drives the rollers 3-21 to rotate, the individual pallets 3-19 can be positioned, conveyed, and stopped at their pushing positions. The pallet pushing mechanism 3-17 is fixed to the pushing position on the side of the pallet delivery roller conveyor 3-20 via a pallet pushing mechanism support 3-16. Through the pallet pushing plate 3-18, the positioned and stopped pallets 3-19 can be conveyed to a paper receiving or finished product receiving table for collecting stacked printed paper; alternatively, the pallets 3-19 can be conveyed to other equipment where pallets are used to collect stacked items.

[0067] During operation, the structural parameters of the pallet 3-19 to be transported are pre-input into the computer control system of the automatic pallet conveyor. Based on the structure of the pallet 3-19 being transported, the opening positions of the small pallets 3-34 on the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44 are manually adjusted and locked beforehand, ensuring that the small pallets 3-34 align with the open positions of the pallet 3-19 structure. Based on the detection of the automatic pallet conveyor, it can automatically set the working mode to determine whether the pallet 3-19 being transported from the workshop logistics system to the pallet feeding roller conveyor 3-29 is a single pallet 3-19 or a stack of pallets 3-46. Simultaneously, the automatic pallet conveyor can adjust the conveying speed of the pallets 3-19 according to the production speed and cycle time of the machines that need to transport them, ensuring that the pallet 3-19 is delivered precisely when the machines need to replace it.

[0068] When the workshop logistics system, other transport vehicles, or manual labor transports a single pallet 3-19 onto the pallet feeding roller conveyor 3-29, the feeding roller conveyor drive motors I 3-30 and II 3-36 drive several rollers 3-21 to rotate, conveying the pallet 3-19 to the front end of the pallet positioning plate 3-8 for positioning. Based on the production cycle of the pallet 3-19 being transported to the work position, the gear shaft drive motor 3-42 drives the gear 3-24 to rotate, lifting the moving frame upwards along the fixed frame 3-26, allowing the pallet 3-19 to pass just below the pallet positioning plate 3-8. Driven by the feeding roller conveyor drive motors II 3-36 and III 3-22, the pallet 3-19 is delivered onto the pallet output roller conveyor 3-20 and stops at the appropriate position. At the start of the next production cycle, pallet 3-19 is positioned and conveyed under the drive of the delivery roller drive motor 3-22 and stops at the pallet 3-19 push position. The pallet pusher 3-18 pushes out, conveying pallet 3-19, which is stopped at the push position, to the paper receiving table or finished product receiving table for collecting stacked printed paper; or to the location where other equipment uses pallets to collect stacked items.

[0069] When the workshop logistics system or other transportation vehicles transport a stack of pallets 3-46 onto the pallet feeding roller conveyor 3-29, the automatic pallet conveying device automatically switches its working mode. Based on pre-input pallet structure parameters, the control system controls the screw shaft drive motor 3-9 to drive the left and right rotating screw shafts 3-6 to rotate. This, through the left-hand nut 3-3 and right-hand nut 3-13, causes the left and right lifting support plates 3-4 to synchronously translate inward or outward relative to the center plane of the fixed frame. This positions the fixing plates 3-31 of the left pallet lifting mechanism 3-45 and the right pallet lifting mechanism 3-44 close to the sides of the pallet 3-19. Simultaneously, the control system controls the gear shaft drive motor 3-42 to drive the gear 3-24 to rotate, causing the moving frame, carrying the fixed pallet positioning plate 3-8, to move downward along the fixed frame 3-26 to its lowest position. As the feed roller drive motor I 3-30 and feed roller drive motor II 3-36 drive several rollers 3-21 to rotate, the stacked pallets 3-46 are transported to the front end of the pallet positioning plate 3-8 for positioning.

[0070] After the front end of the stacked pallets 3-46 is positioned by the pallet positioning plate 3-8, under the control of the control system, the gear shaft drive motor 3-42 drives the gear 3-24 to rotate, lifting the moving frame and the left and right lifting support plates 3-4 upwards and stopping at the position of the second pallet 2-19 (counting from bottom to top). At this time, the cylinder 3-35 push rods of the left and right pallet lifting mechanisms 3-45 and 3-44 extend, pushing the small trays 3-34 on the left and right sides out of the fixing plate 3-31 and inserting them into the gaps in the structure of pallet 2-19. Afterwards, the gear shaft drive motor 3-42 continues to drive the gear 3-24 to rotate, lifting the moving frame and the left and right lifting support plates 3-4 upwards, and driving the small trays 3-34 inserted in the gaps in the structure of pallet 2-19, lifting the second pallet 2-19 (counting from bottom to top) and the stacked pallets 3-46 above it, separating the first pallet 3-19 from the stacked pallets 3-46. Driven by the infeed roller drive motor II 3-36 and the outfeed roller drive motor 3-22, the pallet 3-19, separated from the stacked pallets 3-46, is sent to the pallet outfeed roller 3-20 and stops in the appropriate position.

[0071] After pallet 3-19 is delivered from the front end of pallet positioning plate 3-8 onto pallet delivery roller 3-20, under the control of the control system, gear shaft drive motor 3-42 drives gear 3-24 to rotate, moving the moving frame and left and right lifting support plates 3-4 downwards to the lowest position, causing the stacked pallets 3-46 supported on small pallet plates 3-34 to fall onto pallet delivery roller 3-29. Afterwards, the cylinders 3-35 of the left and right pallet lifting mechanisms 3-45 and 3-44 retract, causing the small pallet plates 3-34 to exit the gap in the pallet 2-19 structure and return to their initial position. Following the production speed and cycle time of the machine that needs to transport pallets 3-19, the next cycle begins at the start of the next production cycle.

[0072] At the start of the next production cycle, the delivery roller drive motor 3-22 drives the 3-21 roller of the pallet delivery roller 3-20 to rotate, positioning and conveying the pallet 3-19 and stopping it at the pallet 3-19 push position. According to the production cycle of the machine, when the pallet is needed, the pallet push plate 3-18 of the pallet push mechanism 3-17 pushes out, pushing the pallet 3-19 stopped at the push position to the work position for collecting and stacking printed paper or other items that are collected and stacked using pallets.

[0073] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0074] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An automatic pallet conveying device, characterized in that, include: The pallet feeding roller conveyor (3-29) is driven by feeding roller conveyor drive motor I (3-30) and feeding roller conveyor drive motor II (3-36) for conveying a single pallet (3-19) or stacked pallets (3-46). The fixed frame (3-26) is formed by the left column (3-1), the right column (3-12), the upper crossbeam of the fixed frame (3-11), and the lower crossbeam of the fixed frame (3-40) being fixedly connected; The movable frame is installed on the fixed frame (3-26) via the movable frame slide rail (3-14), and can slide vertically up and down along the left column (3-1) and right column (3-12) of the fixed frame; The gear shaft drive motor (3-42) drives the gear shaft (3-25) to rotate, and through the meshing of the gear (3-24) and rack (3-23), it drives the moving frame to slide vertically up and down; The lower sliding rail assembly (3-39) is installed on both sides of the lower crossbeam (3-41) of the movable frame to support the lifting support plates (3-4) on the left and right sides. The upper sliding rail (3-5) is installed on both sides of the upper crossbeam (3-10) of the moving frame to support the lifting support plates (3-4) on the left and right sides. The screw shaft drive motor (3-9) drives the left and right screw shafts (3-6) to rotate, which in turn drives the lifting support plate (3-4) to move horizontally through the left-hand nut (3-3) and the right-hand nut (3-13); The pallet lifting mechanism includes a left pallet lifting mechanism (3-45) and a right pallet lifting mechanism (3-44), which are mounted on the lifting support plate (3-4) and are used to lift and separate stacked pallets; The cylinder (3-35) is fixed to the outside of the lifting support plate (3-4) to drive the small tray (3-34) to extend and retract, assisting in the separation of the tray; The pallet positioning plate (3-8) is fixed in the middle position between the lower crossbeam (3-41) and the upper crossbeam (3-10) of the movable frame, and is used to position the front face of the pallet; The pallet delivery roller conveyor (3-20) is driven by the delivery roller conveyor drive motor (3-22) and is used to transport the pallet (3-19) to the designated position; The pallet pushing mechanism (3-17) pushes the positioned and stopped pallet (3-19) to the collection and stacking position through the pallet pushing plate (3-18).

2. The automatic pallet conveying device as described in claim 1, characterized in that: Multiple rollers (3-21) are arranged on the pallet feeding roller conveyor (3-29) on the side of the pallet positioning plate (3-8) and are driven by feeding roller conveyor drive motor I (3-30) and feeding roller conveyor drive motor II (3-36) respectively.

3. The automatic pallet conveying device as described in claim 1, characterized in that: The fixed frame (3-26) is formed as a rectangular frame.

4. The automatic pallet conveying device as described in claim 1, characterized in that: On the left column (3-1) and right column (3-12) of the fixed frame (3-26), a slide rail of a movable frame slide rail (3-14) is vertically fixedly installed facing the pallet feeding roller conveyor (3-29). On the symmetrically installed movable frame slide rail (3-14), there are multiple slide seats, which are fixedly connected to the movable frame columns (3-15) on both sides of the movable frame. The movable frame is a rectangular frame formed by the upper crossbeam (3-10), the lower crossbeam (3-41), and the left and right movable frame columns (3-15) fixed together.

5. The automatic pallet conveying device as described in claim 1, characterized in that: On the left and right sides of the surface of the lower crossbeam (3-41) of the movable frame facing the pallet feeding roller (3-29), a lower movable slide rail (3-39) is fixedly installed respectively. Multiple slide blocks are provided on the symmetrically installed lower sliding rail assembly (3-39); the multiple slide blocks on the left side are fixedly installed on the lower part of the end panel of the left lifting support plate (3-4), and the multiple slide blocks on the right side are fixedly installed on the lower part of the end panel of the right lifting support plate (3-4). On the left and right sides of the upper surface of the upper beam (3-10) of the movable frame, a slide rail of upper movable slide rail (3-5) is fixedly installed; multiple slide seats are provided on the symmetrically installed upper movable slide rail (3-5); multiple slide seats on the left side are fixedly installed on the lower surface of the top plate of the left lifting support plate (3-4), and multiple slide seats on the right side are fixedly installed on the lower surface of the top plate of the right lifting support plate (3-4).

6. The automatic pallet conveying device as described in claim 1, characterized in that: Two screw shaft supports (3-7) are fixedly installed at the center-symmetrical positions on the upper surface of the upper crossbeam (3-10) of the movable frame to support the left and right screw shafts (3-6). On the upper surface of the top plate of the left and right lifting support plates (3-4), a nut support (3-2) is fixedly installed respectively. A left-handed nut (3-3) is fixedly installed on the left nut support (3-2), and a right-handed nut (3-13) is fixedly installed on the right nut support (3-2). The left-hand screw of the left-hand screw shaft (3-6) passes through the left-hand nut (3-3), and the right-hand screw passes through the right-hand nut (3-13).

7. The automatic pallet conveying device as described in claim 1, characterized in that: A left pallet lifting mechanism (3-45) is fixedly installed on the inner side of the left lifting support plate (3-4). A right pallet lifting mechanism (3-44) is fixedly installed on the inside of the right lifting support plate (3-4). The left pallet lifting mechanism (3-45) is supported by four fixed shafts (3-32) and installed on the inner side of the side plate of the left lifting support plate (3-4). One end of the four fixed shafts (3-32) is fixedly installed on the four corners of the pallet lifting mechanism fixing plate (3-31), and the other end is fixedly installed on the inner side of the side plate of the left lifting support plate (3-4). The right pallet lifting mechanism (3-44) is supported by four fixed shafts (3-32) and installed on the inner side of the side plate of the right lifting support plate (3-4). One end of the four fixed shafts (3-32) is fixedly installed on the four corners of the pallet lifting mechanism fixing plate (3-31), and the other end is fixedly installed on the inner side of the side plate of the right lifting support plate (3-4). On the left pallet lifting mechanism (3-45) and the right pallet lifting mechanism (3-44), there is a small pallet drive crossbar (3-38) which is supported by two linear bearings (3-43) and mounted on two parallel fixed shafts (3-32) at the bottom, and can slide along the two fixed shafts (3-32); On the upper surface of the small pallet drive crossbar (3-38), a small pallet slide rail (3-33) is symmetrically fixed and installed, and a small pallet (3-34) is fixed on the slide seat of the small pallet slide rail (3-33). The small tray (3-34) can move along the slide rail to adjust its position, and can be locked in the adjusted position by the small tray locking knob (3-37); The cylinder (3-35) is fixedly installed on the outer side of the side plate of the left and right lifting support plate (3-4), and the push rod of the cylinder (3-35) is fixedly connected to the middle part of the small support plate drive crossbar (3-38).

8. The automatic pallet conveying device as described in claim 1, characterized in that: A pallet positioning plate (3-8) is fixedly installed at the middle position of the lower crossbeam (3-41) and the upper crossbeam (3-10) of the movable frame facing the pallet feeding roller conveyor (3-29). The lower edge of the pallet positioning plate (3-8) is flush with the lower surface of the lower crossbeam (3-41) of the movable frame. On the right side of the fixed frame (3-26), along the conveying direction of the pallet (3-19), a pallet delivery roller conveyor (3-20) is fixedly installed. Between the two side wall panels of the pallet delivery roller conveyor (3-20), multiple rollers (3-21) are installed in parallel, and the upper tangent planes of the multiple rollers (3-21) are located on the same plane. The rollers (3-21) are driven by the feed roller drive motor (3-22). As the feed roller drive motor (3-22) drives several rollers (3-21) to rotate, the individual pallets (3-19) can be positioned, conveyed and stopped at the pallet (3-19) push position. The pallet pushing mechanism (3-17) is fixed on the pushing position on the side of the pallet delivery roller conveyor (3-20) via the pallet pushing mechanism support (3-16). Through the pallet pushing plate (3-18), the pallet (3-19) that has been positioned and stopped can be transported to the paper receiving or finished product receiving table for collecting stacked printed paper.

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