Fully automatic high-precision packaging box base assembly machine

Abstract

The present invention discloses a fully automatic high-precision packaging box base assembly machine, comprising a first frame, a second frame, a bottom plate conveying device, a bottom box conveying device and a base assembly device, wherein a workbench is provided on the first frame, the second frame is mounted on the upper part of the first frame, the base assembly device comprises an assembly bracket, an assembly bracket driving assembly, a double-stroke driving cylinder, a box holding bracket, a box holding driving cylinder and a controller, the assembly bracket is mounted on the second frame, the power output end of the assembly bracket driving assembly is connected to the assembly bracket, the double-stroke driving cylinder is mounted on the assembly bracket, the outer periphery and lower end of the piston rod at the lower part of the double-stroke driving cylinder are respectively connected to the box holding bracket and the pressing plate, the piston rod of the box holding driving cylinder is connected to the box holding plate, and the end face of the box holding plate away from the box holding driving cylinder is a right-angle surface. The present invention can ensure that the bottom box will not be deformed and ensure that the bottom box and the bottom plate are accurately aligned, thereby improving the assembly quality of the base.

Description

Technical Field

[0001] The invention relates to packaging box base assembly equipment, in particular to a full-automatic high-precision packaging box base assembly machine. Background Art

[0002] In the automated production process of packaging boxes (such as wine boxes), various local components need to be assembled. For example, assembling the bottom plate and the bottom box together to form a base is a common packaging box processing process.

[0003] Equipment that assembles the base plate and the bottom box together to form the base of the packaging box is collectively referred to as a packaging box base assembly machine. A traditional packaging box base assembly machine first transports the base plate to the location of the base assembly device through a base plate conveying device, and transports the bottom box to the location of the base assembly device through a bottom box conveying device, and then completes the base assembly through the base assembly device. The processing flow of the base assembly device is: since the upper surface of the base plate needs to be glued and the base plate is located below the bottom box, the push plates of two or four clamping cylinders are used to clamp the bottom box from four opposite sides or four side outer sides, and then move it to the top of the base plate. After releasing the push plates of the clamping cylinders, the bottom box is pressed against the base plate by the pressing cylinder and maintained for a certain period of time to complete the automated assembly of the base.

[0004] The defects of the above-mentioned traditional packaging box base assembly machine are: since the two ends of the bottom box are not fixed, when the push plates of the clamping cylinder of the base assembly device clamp the bottom box from two or four sides, the bottom box is prone to deformation, which may cause the bottom box itself to deform and be difficult to restore, or cause inaccurate alignment between the bottom box and the bottom plate, thereby reducing the quality of base assembly; at the same time, multiple clamping cylinders and pressing cylinders need to be installed in close proximity, and multiple clamping cylinders are required to have an overall moving function, resulting in a complex structure and difficulty in processing and assembly.

[0005] In addition, the transmission function of the bottom plate conveying device of the above-mentioned traditional packaging box base assembly machine is realized by a conveyor belt, and there are the following defects: the conveyor belt itself runs continuously. When the bottom plate runs on the conveyor belt to the corresponding station (such as the gluing station, the assembly station, etc.), it is necessary to use a push plate or a push rod driven by a cylinder to extend to block it, and then a push plate or a push rod in another direction needs to be extended to position it, and then the bottom plate and the bottom box can be assembled. Since it is necessary to block and position the bottom plate to be processed, and to block other non-processed bottom plates to avoid affecting the processing operation, multiple electric eyes (proximity sensors) and multiple cylinders and push plates or push rods are required at the assembly station and other related stations to complete the assembly or other corresponding processing processes. Not only is the structure complicated, but the positioning accuracy of the product is not high, especially for components like the bottom plate, which are very small in height. It is even more difficult to accurately position them from four directions by traditional push rods or push rods. Summary of the invention

[0006] The purpose of the present invention is to provide a fully automatic high-precision packaging box base assembly machine in order to solve the above problems, wherein the base box will not deform and is accurately aligned with the bottom plate.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0008] A fully automatic high-precision packaging box base assembly machine comprises a first frame, a second frame, a bottom plate conveying device, a bottom box conveying device and a base assembly device, wherein a horizontal workbench is provided on the first frame, the second frame is installed on the upper part of the first frame, the base assembly device is arranged on the second frame and is located above the workbench, the base assembly device comprises an assembly bracket, an assembly bracket driving component, a double-stroke driving cylinder, a box holding bracket, a box holding driving cylinder and a controller, the assembly bracket is installed on the second frame through an assembly slide rail and can slide on the assembly slide rail, the assembly bracket driving component is installed on the second frame and its power output end is connected to the assembly bracket, and the vertical double-stroke driving cylinder is installed on On the assembly bracket, the outer periphery of the piston rod at the lower part of the double-stroke driving cylinder is connected to the box holding bracket, and the lower end of the piston rod of the double-stroke driving cylinder is connected to the horizontal pressure plate. The four box holding driving cylinders are respectively installed at the four corners of the box holding bracket, and the piston rod of the box holding driving cylinder is connected to the box holding plate. The end face of the box holding plate away from the box holding driving cylinder is a right-angle surface. A vertical square through hole is provided in the middle of the box holding bracket and the box holding plate is placed at the four corners of the square through hole when it is extended and the pressure plate is located above the square through hole. The control input end of the assembly bracket driving component, the control input end of the double-stroke driving cylinder and the control input end of the box holding driving cylinder are respectively connected to the control output end of the controller.

[0009] Preferably, in order to achieve precise control over the movement of the assembly bracket, the assembly bracket driving component includes an assembly drive motor, an assembly drive screw and an assembly drive nut seat, the assembly drive motor is installed on the second frame, the rotating shaft of the assembly drive motor is connected to the assembly drive screw, the assembly drive nut seat is sleeved on the assembly drive screw through its own screw hole, the assembly drive nut seat is installed on the assembly bracket, the two ends of the assembly bracket are respectively installed on the assembly slide rails, the two assembly slide rails are respectively installed on the second frame, and the control input end of the assembly drive motor is correspondingly connected to the control output end of the controller.

[0010] Preferably, in order to stably connect the box holding bracket and the piston rod of the two-stroke driving cylinder and not affect the clamping and releasing actions of the four box holding plates on the bottom box, the four corners of the box holding bracket are connected to the lower ends of four vertical connecting rods, the upper ends of the four connecting rods are connected to the connecting plate, the connecting plate is connected to the outer periphery of the piston rod of the two-stroke driving cylinder, and the box holding driving cylinder is located below the box holding bracket.

[0011] Preferably, in order to realize high-precision positioning control function of base plate movement and stopping, the base plate conveying device includes a base plate driving motor, a base plate driving screw, a base plate driving nut seat, a base plate driving plate and a base plate driving cylinder. The workbench is provided with a vertically penetrating and axially horizontal strip hole, and the axial direction of the strip hole is the front-to-back direction. Limiting structures are respectively provided on the upper surface of the workbench at the left and right sides of the strip hole. The base plate driving motor is installed on the first frame and is located below the workbench. The rotating shaft of the base plate driving motor is connected to one end of the base plate driving screw. The base plate driving screw is arranged through a bearing seat. It is installed on the first frame and its axial direction is the front-to-back direction. The base plate driving nut seat is sleeved on the base plate driving screw through its own screw hole. The base plate driving plate is installed on the base plate driving nut seat. Multiple vertical base plate driving cylinders are installed on the base plate driving plate and are evenly distributed along the front-to-back direction. A base plate push block is installed on the upper end of the piston rod of each base plate driving cylinder. When the piston rod of the base plate driving cylinder is extended upward, the corresponding base plate push block passes through the strip hole from bottom to top. The control input end of the base plate driving motor and the control input end of the base plate driving cylinder are respectively connected to the control output end of the controller.

[0012] Preferably, in order to facilitate the installation of the base plate driving plate and ensure its reliable movement in the front and rear directions, a base plate material bin is installed at one end above the workbench and this end is the front end, the base plate driving motor is located at the front end of the first frame, the base plate material bin is located directly above the strip hole, the base plate driving nut seat is connected to the lower front part of the base plate driving plate, the lower rear part of the base plate driving plate is connected to the guide seat, the guide seat is mounted on the guide rod with the axial direction in the front and rear direction through its own through hole, and the guide rod is installed on the first frame.

[0013] Preferably, in order to facilitate the base assembly processing of the packaging box and realize precise control of pushing a base plate each time, there are four base plate driving cylinders, the maximum stroke distance of the base plate driving nut seat on the base plate driving screw and the maximum stroke distance of the guide seat on the guide rod are both greater than the distance between two adjacent base plate driving cylinders, the front middle part of the base plate material bin is empty, the vertical distance between the rear lower edge of the base plate material bin and the upper surface of the workbench is greater than the thickness of one base plate and less than the thickness of two base plates, and when the piston rod of the base plate driving cylinder extends upward, the upper surface of the corresponding base plate push block is higher than the upper surface of the workbench and the height of the protruding part is less than the thickness of one base plate.

[0014] Preferably, in order to limit the bottom plate or base in the left and right directions and give it a certain pre-tightening force to ensure that the bottom plate or base stops in the front and back directions more accurately, the limiting structure on the upper surface of the workbench and located on one side of the strip hole is a limiting strip, and the limiting strip is installed on the upper surface of the workbench and its axial direction is the front and back direction, and the limiting structure on the upper surface of the workbench and located on the other side of the strip hole is a plurality of elastic limiting components, and the elastic limiting components include a limiting rod, a pulley and a spring, the transverse limiting rod is installed on the workbench through a vertical pin shaft and can rotate transversely, and the pulley is installed in the One end of the limit rod is close to the strip hole and can rotate horizontally, the two ends of the spring are respectively connected to the end of the limit rod away from the strip hole and the upper surface of the workbench so that the pulley has an elastic force to approach the strip hole, and a vertical through-waist hole is provided on the limit rod near the spring, the arc where the waist-shaped hole is located is a part of a virtual perfect circle with the point where the center line of the pin shaft and the limit rod intersect as the center, a vertical limit column is provided at a position on the workbench corresponding to the waist-shaped hole, the limit column passes through the waist-shaped hole, and a plurality of elastic limit components are arranged on the workbench along the front-to-back direction.

[0015] Preferably, in order to facilitate the conveying of the bottom box to a position close to the base assembly device, the bottom box conveying device includes a bottom box conveyor belt, a bottom box proximity sensor, a bottom box pushing cylinder, a cylinder mounting plate and a cylinder driving assembly, the bottom box conveyor belt is arranged beside the workbench and close to the base assembly device, a bottom box baffle is provided at a position close to the base assembly device on the second frame, the bottom box proximity sensor is arranged at a position close to the bottom box baffle on the second frame, the vertical bottom box pushing cylinder is located obliquely above the bottom box baffle, the bottom box pushing cylinder is connected to the cylinder mounting plate, the cylinder mounting plate is mounted on the second frame through a bottom box driving slide rail and can slide on the bottom box driving slide rail, the cylinder driving assembly is mounted on the second frame and its power output end is connected to the cylinder mounting plate, the piston rod at the lower part of the bottom box pushing cylinder is connected to the bottom box push rod, the signal output end of the bottom box proximity sensor is connected to the signal input end of the controller, and the control input end of the bottom box pushing cylinder and the control input end of the cylinder driving assembly are respectively connected to the control output end of the controller.

[0016] Preferably, in order to achieve precise control of the movement of the bottom box pushing cylinder, the cylinder driving assembly includes a cylinder driving motor, a cylinder driving screw and a cylinder driving nut seat, the cylinder driving motor is installed on the second frame, the rotating shaft of the cylinder driving motor is connected to the cylinder driving screw, the cylinder driving nut seat is sleeved on the cylinder driving screw through its own screw hole, the cylinder driving nut seat is connected to the cylinder mounting plate, the bottom box driving slide rail is one and is parallel to the assembly slide rail and perpendicular to the movement direction of the bottom box conveyor belt, and the control input end of the cylinder driving motor is correspondingly connected to the control output end of the controller.

[0017] The beneficial effects of the present invention are:

[0018] The present invention drives a box holding plate to hold the bottom box from four corners of the bottom box through four box holding driving cylinders, utilizes the right-angle surface structure of the box holding plate to evenly stress both sides of the corresponding corner positions, and utilizes the structural feature of the bottom box with high strength at the corner positions to achieve the function of clamping the bottom box and ensuring that the bottom box will not be deformed, and controls the assembly bracket to drive the box holding bracket and the four box holding driving cylinders to move synchronously through the assembly bracket driving component, ultimately ensuring that the bottom box is accurately aligned with the bottom plate, thereby improving the assembly quality of the base; a double-stroke driving cylinder is used to realize the lifting and pressing control of the bottom box, thereby simplifying the structure while ensuring the assembly quality of the base, and facilitating the processing, assembly and functional coordination of various components.

[0019] In addition, the present invention provides a limiting structure on the top of the workbench so that the bottom plate and the assembled base can be limited left and right during the movement in the front and rear directions. By installing a bottom plate driving motor, a bottom plate driving screw rod, a bottom plate driving nut seat, a bottom plate driving plate and a bottom plate driving cylinder under the workbench, the bottom plate and the base can be pushed at a fixed distance. The bottom plate driving plate drives multiple bottom plate driving cylinders to move from front to back a determined distance (the distance is the same as the distance between multiple workstations arranged above the workbench) and then reset to complete a stroke. This is repeated to move the bottom plate and the base from one workstation to the next, and the high-precision characteristics of the screw transmission are utilized to realize the high-precision positioning function of the bottom plate and the base in the front and rear directions of each workstation, and finally the high-precision positioning function of the bottom plate and the base in the front, rear, left and right directions of each workstation is realized. At the same time, the structure is simplified due to the reduction of many electric eyes and pushing cylinders, which is particularly suitable for conveying bottom plates with smaller thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional diagram of the fully automatic high-precision packaging box base assembly machine of the present invention;

[0021] Figure 2 It is an enlarged stereoscopic view of the elastic limiting assembly of the fully automatic high-precision packaging box base assembly machine of the present invention;

[0022] Figure 3 It is a partially enlarged stereoscopic view of one of the bottom plate driving cylinders and its bottom plate push block and bottom plate bin of the fully automatic high-precision packaging box bottom assembly machine of the present invention;

[0023] Figure 4 It is a partially enlarged stereoscopic view of one of the box holding cylinders and its box holding plate and box holding bracket of the fully automatic high-precision packaging box base assembly machine of the present invention;

[0024] Figure 5 It is a front view of the fully automatic high-precision packaging box base assembly machine described in the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] like Figure 1 and Figure 4As shown, the fully automatic high-precision packaging box base assembly machine of the present invention includes a first frame 1, a second frame 27, a bottom plate conveying device, a bottom box conveying device and a base assembly device. The first frame 1 is provided with a horizontal workbench 3, and the second frame 27 is installed on the upper part of the first frame 1. The base assembly device is arranged on the second frame 27 and is located above the workbench 3. The base assembly device includes an assembly bracket 16, an assembly bracket driving component 17, a double-stroke driving cylinder 20, a box holding bracket 13, a box holding driving cylinder 26 and a controller (not shown in the figure). The assembly bracket 16 is installed on the second frame 27 through an assembly slide rail (not marked in the figure, which is a conventional structure) and can slide on the assembly slide rail. The assembly bracket driving component 17 is installed on the second frame 27 and its power output end is connected to the assembly bracket 16 , a vertical double-stroke driving cylinder 20 is installed on the assembly bracket 16, the outer periphery of the piston rod of the lower part of the double-stroke driving cylinder 20 is connected to the box holding bracket 13, the lower end of the piston rod of the double-stroke driving cylinder 20 is connected to the horizontal pressing plate 21, and the four box holding driving cylinders 26 are respectively installed at the four corners of the box holding bracket 13, and the piston rod of the box holding driving cylinder 26 is connected to the box holding plate 22. The end face of the box holding plate 22 away from the box holding driving cylinder 26 is a right-angle surface, and a vertical square through hole is provided in the middle of the box holding bracket 13, and the box holding plate 22 is placed at the four corners of the square through hole when it is extended, and the pressing plate 21 is located above the square through hole, and the control input end of the assembly bracket driving component 17, the control input end of the double-stroke driving cylinder 20 and the control input end of the box holding driving cylinder 26 are respectively connected to the control output end of the controller.

[0027] like Figure 1-Figure 5 As shown, the present invention also discloses the following multiple more optimized specific structures. According to actual needs, the above structure can be superimposed and combined with one or more of the following structures to form a more optimized technical solution.

[0028] In order to achieve precise control of the movement of the assembly bracket 16, the assembly bracket drive component 17 includes an assembly drive motor, an assembly drive screw and an assembly drive nut seat, wherein the assembly drive motor is mounted on the second frame 27, the rotating shaft of the assembly drive motor is connected to the assembly drive screw, the assembly drive nut seat is sleeved on the assembly drive screw through its own screw hole, the assembly drive nut seat is mounted on the assembly bracket 16, the two ends of the assembly bracket 16 are respectively mounted on the assembly slide rails, the two assembly slide rails are respectively mounted on the second frame 27, and the control input end of the assembly drive motor is correspondingly connected to the control output end of the controller. Note: The above-mentioned assembly drive motor, assembly drive screw and assembly drive nut seat are all integrated and installed in a module, which is a conventional existing component. The structure thereof is described here to make it clear that the present invention uses a precise drive module such as screw drive.

[0029] In order to stably connect the box holding bracket 13 and the piston rod of the two-stroke driving cylinder 20 and not affect the clamping and releasing action of the four box holding plates 22 on the bottom box 15, the four corners of the box holding bracket 13 are connected to the lower ends of four vertical connecting rods 25, the upper ends of the four connecting rods 25 are connected to the connecting plate 24, the connecting plate 24 is connected to the outer periphery of the piston rod of the two-stroke driving cylinder 20, and the box holding driving cylinder 26 is located below the box holding bracket 13.

[0030] In order to realize the high-precision positioning control function of the movement and stop of the base plate 6, the base plate conveying device includes a base plate driving motor 32, a base plate driving screw 35, a base plate driving nut seat 33, a base plate driving plate 34 and a base plate driving cylinder 4. A vertically penetrating and axially horizontal strip hole 8 is provided on the workbench 3. The axial direction of the strip hole 8 is the front-to-back direction. The upper surface of the workbench 3 is provided with limit structures on the left and right sides of the strip hole 8. The base plate driving motor 32 is installed on the first frame 1 and is located below the workbench 3. The rotating shaft of the base plate driving motor 32 is connected to one end of the base plate driving screw 35. The base plate driving screw 35 is connected through a bearing The seat 36 is installed on the first frame 1 and its axial direction is the front-to-back direction. The base plate driving nut seat 33 is mounted on the base plate driving screw 35 through its own screw hole. The base plate driving plate 34 is installed on the base plate driving nut seat 33. Multiple vertical base plate driving cylinders 4 are installed on the base plate driving plate 34 and are evenly distributed along the front-to-back direction. A base plate push block 5 is installed on the upper end of the piston rod of each base plate driving cylinder 4. When the piston rod of the base plate driving cylinder 4 extends upward, the corresponding base plate push block 5 passes through the strip hole 8 from bottom to top. The control input end of the base plate driving motor 32 and the control input end of the base plate driving cylinder 4 are respectively connected to the control output end of the controller.

[0031] In order to facilitate the installation of the bottom plate driving plate 34 and ensure its reliable movement in the front and rear directions, a bottom plate material bin 7 is installed at one end above the workbench 3 and this end is the front end, the bottom plate driving motor 32 is located at the front end of the first frame 1, the bottom plate material bin 7 is located directly above the strip hole 8, the bottom plate driving nut seat 33 is connected to the lower front part of the bottom plate driving plate 34, and the lower rear part of the bottom plate driving plate 34 is connected to the guide seat 37. The guide seat 37 is mounted on the guide rod 38 with an axial direction in the front and rear direction through its own through hole, and the guide rod 38 is installed on the first frame 1.

[0032] In order to facilitate the assembly processing of the base 12 of the packaging box and realize precise control of pushing a base plate 6 each time, there are four base plate driving cylinders 4, and the maximum stroke distance of the base plate driving nut seat 33 on the base plate driving screw 35 and the maximum stroke distance of the guide seat 37 on the guide rod 38 are both greater than the distance between two adjacent base plate driving cylinders 4. The middle part of the front side of the base plate bin 7 is empty, and the vertical distance between the lower edge of the rear side of the base plate bin 7 and the upper surface of the workbench 3 is greater than the thickness of one base plate 6 and less than the thickness of two base plates 6. When the piston rod of the base plate driving cylinder 4 extends upward, the upper surface of the corresponding base plate push block 5 is higher than the upper surface of the workbench 3 and the height of the protruding part is less than the thickness of one base plate 6.

[0033] In order to limit the bottom plate 6 or the base 12 in the left and right directions and give it a certain pre-tightening force to ensure that the bottom plate 6 or the base 12 stops in the front and rear directions more accurately, the limiting structure on the upper surface of the workbench 3 and located on one side of the strip hole 8 is a limiting strip 9, and the limiting strip 9 is installed on the upper surface of the workbench 3 and its axial direction is the front and rear direction. The limiting structure on the upper surface of the workbench 3 and located on the other side of the strip hole 8 is a plurality of elastic limiting components, and the elastic limiting components include a limiting rod 11, a pulley 10 and a spring 31 (a tension spring in the figure). The horizontal limiting rod 11 is installed on the workbench 3 through a vertical pin shaft 28 and can rotate horizontally. The pulley 10 is installed on one end of the limit rod 11 close to the strip hole 8 and can rotate horizontally, the two ends of the spring 31 are respectively connected to the end of the limit rod 11 away from the strip hole 8 and the upper surface of the workbench 3 and make the pulley 10 have an elastic force to approach the strip hole 8, a vertical through waist-shaped hole 29 is provided at a position close to the spring 31 on the limit rod 11, and the arc where the waist-shaped hole 29 is located is a part of a virtual perfect circle with the point where the center line of the pin shaft 28 and the limit rod 11 intersect as the center of the circle, and a vertical limit column 30 is provided at a position on the workbench 3 corresponding to the waist-shaped hole 29, and the limit column 30 passes through the waist-shaped hole 29, and a plurality of the elastic limit components are arranged on the workbench 3 along the front-to-back direction.

[0034] In order to facilitate the conveying of the bottom box 15 to a position close to the base assembly device, the bottom box conveying device includes a bottom box conveyor belt 14 (only a simple schematic diagram in the figure, which is a conventional conveyor belt), a bottom box proximity sensor (not visible in the figure, which is a conventional structure), a bottom box pushing cylinder 19, a cylinder mounting plate (not marked in the figure) and a cylinder driving assembly 23. The bottom box conveyor belt 14 is arranged next to the workbench 3 and close to the base assembly device. A bottom box baffle is provided on the second frame 27 near the base assembly device (not marked in the figure, which is a conventional structure). The bottom box proximity sensor is arranged on the second frame 27 near the bottom box baffle. The vertical bottom box pushing cylinder 19 is positioned Diagonally above the bottom box baffle, the bottom box push cylinder 19 is connected to the cylinder mounting plate, and the cylinder mounting plate is installed on the second frame 27 through a bottom box driving slide rail (not marked in the figure, it is a conventional structure) and can slide on the bottom box driving slide rail. The cylinder driving assembly 23 is installed on the second frame 27 and its power output end is connected to the cylinder mounting plate. The piston rod at the lower part of the bottom box push cylinder 19 is connected to the bottom box push rod 18, the signal output end of the bottom box proximity sensor is connected to the signal input end of the controller, and the control input end of the bottom box push cylinder 19 and the control input end of the cylinder driving assembly 23 are respectively connected to the control output end of the controller.

[0035] In order to achieve precise control of the movement of the bottom box pushing cylinder 19, the cylinder drive assembly includes a cylinder drive motor, a cylinder drive screw and a cylinder drive nut seat. The cylinder drive motor is installed on the second frame 27. The rotating shaft of the cylinder drive motor is connected to the cylinder drive screw. The cylinder drive nut seat is sleeved on the cylinder drive screw through its own screw hole. The cylinder drive nut seat is connected to the cylinder mounting plate. The bottom box drive slide rail is parallel to the assembly slide rail and perpendicular to the movement direction of the bottom box conveyor belt 14. The control input end of the cylinder drive motor is correspondingly connected to the control output end of the controller. Explanation: The above-mentioned cylinder drive motor, cylinder drive screw and cylinder drive nut seat are all integrated and installed in a module, which is a conventional existing component. The structure is explained here to make it clear that the present invention uses a screw drive such as a precise drive module.

[0036] Figure 1 and Figure 5 The electric control box 2 is also shown, and the controller is placed in the electric control box 2, which is a conventional structure. By arranging limiting guide rods on both sides of the bottom plate driving plate 34, the two sides of the bottom plate driving plate 34 can be limited and guided, so that the bottom plate driving nut seat 33, the bottom plate driving plate 34 and the bottom plate driving cylinder 4 can be moved linearly in the front and rear directions under the rotation of the bottom plate driving screw 35. This is a conventional structure.

[0037] like Figure 1-Figure 5As shown, when used, the bottom plate 6 and the bottom box 15 are first transported to the location of the base assembly device by the bottom plate conveying device and the bottom box conveying device, wherein the conveying process of the bottom plate 6 is as follows:

[0038] First, all the bottom plate driving cylinders 4 are controlled to move the bottom plate pushing block 5 upward to the top of the workbench 3, and the bottom plate driving motor 32 is started to drive the bottom plate driving screw 35 to rotate, so that the bottom plate driving nut seat 33, the bottom plate driving plate 34 and the bottom plate driving cylinder 4 move linearly from front to back, and each time they move from front to back the distance between two adjacent stations (a plurality of stations with equal spacing are located on the workbench 3, and only the station where the base assembly device is located is shown in the figure, which usually also includes a gluing station located in front of the base assembly device and a nailing station located in front of the base assembly device), that is, the bottom plate pushing block 5 pushes the bottom plate 6 or the base 12 from front to back to the next station; then, all the bottom plate driving cylinders 4 are controlled to move the bottom plate pushing block 5 downward to reset, and the bottom plate driving motor 32 is controlled to rotate in the opposite direction, driving the bottom plate driving screw 35 to rotate in the opposite direction, so that the bottom plate driving nut seat 33, the bottom plate driving plate 34 and the bottom plate driving cylinder 4 move linearly from back to front to reset, and prepare for the next conveying of the bottom plate 6 or the base 12. Figure 1 and Figure 5 In the figure, since the focus of the present invention is on the base assembly device and the conveying mechanism, the gluing device located in front of the base assembly device and the nailing device located in front of the base assembly device are not shown in the figure; the bottom plate 6 needs to pass through the gluing device first, and then reach the position of the base assembly device, so the bottom plate 6 has been glued when it reaches the position of the base assembly device.

[0039] The conveying process of the bottom box 15 is as follows:

[0040] The bottom box 15 moves on the bottom box conveyor belt 14. When it moves to the bottom box baffle position, the bottom box proximity sensor obtains a signal and transmits it to the controller. The controller controls the bottom box pushing cylinder 19 to move, so that the bottom box push rod 18 moves downward and is located at a position where the bottom box 15 can be pushed. The cylinder driving assembly 23 is then controlled to move, driving the bottom box pushing cylinder 19 and the bottom box push rod 18 to move toward the direction close to the box holding driving cylinder 26 until the bottom box 15 moves to a position below the space surrounded by the four box holding driving cylinders 26. The cylinder driving assembly 23 is then controlled to move in the reverse direction, driving the bottom box pushing cylinder 19 and the bottom box push rod 18 to move away from the box holding driving cylinder 26 until they are reset. The bottom box pushing cylinder 19 is then controlled to move in the reverse direction, so that the bottom box push rod 18 moves upward and resets, preparing for pushing the next bottom box 15 next time.

[0041] The final positioning accuracy of the above-mentioned base plate 6 is very high, which is achieved through the high-precision positioning effect of the screw drive structure. The final positioning accuracy of the above-mentioned base box 15 does not need to be very high. The range of the space enclosed by the four box-holding drive cylinders 26 will be larger than the corresponding size of the base box 15, so the final positioning accuracy of the base box 15 does not need to be very high.

[0042] After the bottom plate 6 and the bottom box 15 are transported to the corresponding positions, the base assembly device starts to operate. The specific process is as follows:

[0043] First, the double-stroke driving cylinder 20 is controlled to move, driving the pressing plate 21, the box holding bracket 13 and the box holding driving cylinder 26 to move downward synchronously until the four box holding driving cylinders 26 are respectively located at the four corners of the outer side of the bottom box 15. At this time, the pressing plate 21 is located above the bottom box 15, and then the double-stroke driving cylinder 20 stops. At this time, the double-stroke driving cylinder 20 completes the first stroke (the second stroke is not required for this action), and the four box holding driving cylinders 26 are actuated to drive the four box holding plates 22 to extend at the same time, and use their right-angle surfaces to clamp the four corners of the bottom box 15. If If the position of the bottom box 15 is slightly deviated, it will be automatically corrected during the simultaneous action of the four box holding plates 22, and will not cause the bottom box 15 to be deformed; then the double-stroke driving cylinder 20 is controlled to move in the opposite direction, driving the pressing plate 21, the box holding bracket 13, the box holding driving cylinder 26 and the bottom box 15 to move upward and reset synchronously, and then the assembly bracket driving component 17 is controlled to move, driving the assembly bracket 16, the double-stroke driving cylinder 20, the pressing plate 21, the box holding bracket 13, the box holding driving cylinder 26 and the bottom box 15 to move synchronously to a position close to the top of the bottom plate 6 until they reach the bottom The bottom box 15 is located just above the bottom plate 6 and is close to or slightly in contact with each other. Then, the four box holding driving cylinders 26 act in the opposite direction to retract the four box holding plates 22. Then, the two-stroke driving cylinder 20 continues to act to complete the second stroke. The pressing plate 21 presses the bottom box 15 on the bottom plate 6 from top to bottom and Maintain for a certain time until the bottom box 15 is firmly bonded to the bottom plate 6 to obtain the base 12; then the double-stroke driving cylinder 20 reverses, driving the pressing plate 21, the box holding bracket 13 and the box holding driving cylinder 26 to move upward synchronously until they are reset, and then the assembling bracket driving component 17 reverses, driving the assembling bracket 16, the double-stroke driving cylinder 20, the pressing plate 21, the box holding bracket 13 and the box holding driving cylinder 26 to move synchronously to a position away from the top of the base 12 until they are reset, and then the assembling bracket driving component 17 is controlled to stop moving to prepare for the next base assembly operation.

[0044] After completing the assembly of the base 12, the base plate conveying device repeats the action to deliver the next base plate 6 to the location of the base assembly device, and at the same time delivers the assembled base 12 to the next workstation (such as a nailing station), and the base 12 that has completed nailing is delivered to the rear end of the workbench 3. When multiple bases 12 move, they are pushed automatically to the next production process.

[0045] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A fully automatic high-precision packaging box base assembly machine, comprising a first frame, a second frame, a bottom plate conveying device, a bottom box conveying device and a base assembly device, wherein a horizontal workbench is provided on the first frame, the second frame is mounted on the upper part of the first frame, and the base assembly device is arranged on the second frame and located above the workbench, characterized in that: The base assembly device comprises an assembly bracket, an assembly bracket driving assembly, a double-stroke driving cylinder, a box-holding bracket, a box-holding driving cylinder and a controller, the assembly bracket is installed on the second frame through an assembly slide rail and can slide on the assembly slide rail, the assembly bracket driving assembly is installed on the second frame and its power output end is connected with the assembly bracket, the vertical double-stroke driving cylinder is installed on the assembly bracket, the outer periphery of the piston rod at the lower part of the double-stroke driving cylinder is connected with the box-holding bracket, the lower end of the piston rod of the double-stroke driving cylinder is connected with the horizontal pressing plate, four box-holding driving cylinders are respectively installed at the four corners of the box-holding bracket, the piston rod of the box-holding driving cylinder is connected with the box-holding plate, the end face of the box-holding plate away from the box-holding driving cylinder is a right-angle surface, a vertical square through hole is provided in the middle part of the box-holding bracket and the box-holding plate is placed at the four corners of the square through hole when it is extended and the pressing plate is located above the square through hole, the controller of the assembly bracket driving assembly The input end, the control input end of the double-stroke driving cylinder and the control input end of the box holding driving cylinder are respectively connected to the control output end of the controller; the assembly bracket driving component includes an assembly driving motor, an assembly driving screw and an assembly driving nut seat, the assembly driving motor is installed on the second frame, the rotating shaft of the assembly driving motor is connected to the assembly driving screw, the assembly driving nut seat is sleeved on the assembly driving screw through its own screw hole, the assembly driving nut seat is installed on the assembly bracket, the two ends of the assembly bracket are respectively installed on the assembly slide rails, and the two assembly slide rails are respectively installed on the second frame, and the control input end of the assembly driving motor is correspondingly connected to the control output end of the controller; the four corners of the box holding bracket are connected to the lower ends of four vertical connecting rods, the upper ends of the four connecting rods are connected to the connecting plate, the connecting plate is connected to the outer periphery of the piston rod of the double-stroke driving cylinder, and the box holding driving cylinder is located below the box holding bracket.

2. The fully automatic high-precision packaging box base assembly machine according to claim 1, characterized in that: The bottom plate conveying device includes a bottom plate driving motor, a bottom plate driving screw, a bottom plate driving nut seat, a bottom plate driving plate and a bottom plate driving cylinder. The workbench is provided with a strip hole which is vertically through and axially horizontal. The axial direction of the strip hole is the front-to-back direction. The upper surface of the workbench is provided with limiting structures at the left and right sides of the strip hole. The bottom plate driving motor is installed on the first frame and is located below the workbench. The rotating shaft of the bottom plate driving motor is connected to one end of the bottom plate driving screw. The bottom plate driving screw is installed on the first frame through a bearing seat and its axial direction is In the front-to-back direction, the base plate driving nut seat is sleeved on the base plate driving screw through its own screw hole, the base plate driving plate is installed on the base plate driving nut seat, and multiple vertical base plate driving cylinders are installed on the base plate driving plate and are evenly distributed along the front-to-back direction. A base plate push block is installed on the upper end of the piston rod of each base plate driving cylinder. When the piston rod of the base plate driving cylinder extends upward, the corresponding base plate push block passes through the strip hole from bottom to top, and the control input end of the base plate driving motor and the control input end of the base plate driving cylinder are respectively connected to the control output end of the controller.

3. The fully automatic high-precision packaging box base assembly machine according to claim 2, characterized in that: A base plate bin is installed at one end of the workbench and this end is the front end, the base plate driving motor is located at the front end of the first frame, the base plate bin is located directly above the strip hole, the base plate driving nut seat is connected to the lower front part of the base plate driving plate, the lower rear part of the base plate driving plate is connected to the guide seat, the guide seat is mounted on the guide rod with the axial direction in the front-to-back direction through its own through hole, and the guide rod is installed on the first frame.

4. The fully automatic high-precision packaging box base assembly machine according to claim 3 is characterized in that: There are four base plate driving cylinders, the maximum stroke distance of the base plate driving nut seat on the base plate driving screw and the maximum stroke distance of the guide seat on the guide rod are both greater than the distance between two adjacent base plate driving cylinders, the middle part of the front side of the base plate silo is empty, the vertical distance between the lower edge of the rear side of the base plate silo and the upper surface of the workbench is greater than the thickness of one base plate and less than the thickness of two base plates, when the piston rod of the base plate driving cylinder extends upward, the upper surface of the corresponding base plate push block is higher than the upper surface of the workbench and the height of the protruding part is less than the thickness of one base plate.

5. The fully automatic high-precision packaging box base assembly machine according to claim 3, characterized in that: The limiting structure on the upper surface of the workbench located on one side of the strip hole is a limiting strip, the limiting strip is installed on the upper surface of the workbench and its axial direction is the front-to-back direction, the limiting structure on the upper surface of the workbench located on the other side of the strip hole is a plurality of elastic limiting components, the elastic limiting components include a limiting rod, a pulley and a spring, the horizontal limiting rod is installed on the workbench through a vertical pin shaft and can rotate horizontally, the pulley is installed on one end of the limiting rod close to the strip hole and can rotate horizontally, the spring The two ends are respectively connected to one end of the limit rod away from the strip hole and the upper surface of the workbench, so that the pulley has an elastic force to approach the strip hole. A vertical through waist-shaped hole is provided on the limit rod near the spring. The arc where the waist-shaped hole is located is a part of a virtual perfect circle with the point where the center line of the pin shaft and the limit rod intersect as the center. A vertical limit column is provided at a position on the workbench corresponding to the waist-shaped hole. The limit column passes through the waist-shaped hole. A plurality of elastic limit assemblies are arranged on the workbench along the front-to-back direction.

6. The fully automatic high-precision packaging box base assembly machine according to claim 1, characterized in that: The bottom box conveying device includes a bottom box conveying belt, a bottom box proximity sensor, a bottom box pushing cylinder, a cylinder mounting plate and a cylinder driving assembly, the bottom box conveying belt is arranged beside the workbench and close to the base assembly device, a bottom box baffle is arranged at a position close to the base assembly device on the second frame, the bottom box proximity sensor is arranged at a position close to the bottom box baffle on the second frame, the vertical bottom box pushing cylinder is located obliquely above the bottom box baffle, the bottom box pushing cylinder is connected to the cylinder mounting plate, the cylinder mounting plate is installed on the second frame through a bottom box driving slide rail and can slide on the bottom box driving slide rail, the cylinder driving assembly is installed on the second frame and its power output end is connected to the cylinder mounting plate, the piston rod at the lower part of the bottom box pushing cylinder is connected to the bottom box push rod, the signal output end of the bottom box proximity sensor is connected to the signal input end of the controller, and the control input end of the bottom box pushing cylinder and the control input end of the cylinder driving assembly are respectively connected to the control output end of the controller.

7. The fully automatic high-precision packaging box base assembly machine according to claim 6, characterized in that: The cylinder drive assembly includes a cylinder drive motor, a cylinder drive screw and a cylinder drive nut seat, the cylinder drive motor is installed on the second frame, the rotating shaft of the cylinder drive motor is connected to the cylinder drive screw, the cylinder drive nut seat is sleeved on the cylinder drive screw through its own screw hole, the cylinder drive nut seat is connected to the cylinder mounting plate, the bottom box drive slide rail is one and is parallel to the assembly slide rail and perpendicular to the movement direction of the bottom box conveyor belt, and the control input end of the cylinder drive motor is correspondingly connected to the control output end of the controller.

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