Automatic shoe upper marking machine and marking method

Abstract

The present invention discloses an automatic marking machine and marking method for shoe uppers. In the present invention, the housing of a rotating motor is fixed to a fixed block, the output shaft is connected to a rectangular support rod through a gear pair, and the output gear of the gear pair and the fixed block form a rotating pair, the positive and negative threaded rod module is fixed to the fixed block, and the two sliders on the positive and negative threaded rod module are fixed with a clamping frame, and the workbench frame and the machine frame form a rotating pair; the cylinder rotating device is arranged directly above the workbench frame; the automatic marking mechanism is provided with two spaced arrangement, and the inkjet nozzles in the two automatic marking mechanisms are relatively tilted. The present invention realizes marking by two automatic marking mechanisms, replacing manual marking, improving the marking accuracy, and ensuring the marking integrity by setting two relatively tilted inkjet nozzles, effectively improving product quality and production efficiency; the present invention presets the marking trajectory according to the shoe upper shoe type, and can meet the shoe upper marking processing needs of large quantities of different shoe types.

Description

Technical Field

[0001] The invention belongs to the technical field of shoemaking equipment, and in particular relates to an automatic shoe upper marking machine and a marking method. Background Art

[0002] With the continuous development of economy and technology, while the total output value of national economy is rising rapidly, people's pursuit of quality of life such as clothing and dressing is also improving. Therefore, the industry demand for shoemaking machinery and equipment has increased sharply, among which the shoe upper marking machine is widely used in the shoe upper foot line marking process in the shoemaking industry.

[0003] The shoe upper marking machine commonly circulated in the market today is a pneumatic floating bottom marking machine. In the marking process, the sole matching the shoe upper is placed on the workbench as the positioning basis for the shoe upper marking. After the shoe upper on the mold is placed on the sole so that it can fit tightly, the two cylinders fall at the same time, pressing on the toe and tail of the mold respectively, and fixing the shoe upper on the workbench. The operator turns the rotatable floating bottom workbench and draws lines on the shoe upper along the sole with a pen. However, the double cylinders of the marking machine and the pressing fit of the workbench cannot make the shoe upper and the sole fit tightly and be fixed on the workbench well, resulting in problems such as dislocation and distortion of the shoe upper foot line during marking, which causes production problems such as loss of raw materials and reduced shoe quality. Secondly, the marking machine needs to be equipped with professional operators to operate to complete the manual marking of the shoe upper foot line. Over-reliance on manual operation leads to low production efficiency and high production costs, making it difficult to achieve efficient production in the shoemaking industry.

[0004] Some people have also proposed improvement plans for the above-mentioned shoe upper marking machine. For example, the utility model patent with patent number CN209711742U proposes a marking structure of a floating bottom marking machine. The utility model is equipped with operators, which can better solve the problem of low accuracy of manual marking to a certain extent, optimize the manual marking process, and provide a certain degree of accuracy for production. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an automatic shoe upper marking machine and a marking method.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The invention discloses an automatic shoe upper marking machine, which comprises a frame, a clamping and transporting mechanism, a multi-block workbench mechanism, an ink storage and transmission mechanism, an automatic marking mechanism, a transmission positioning mechanism and a cylinder rotating device.

[0008] The clamping and transporting mechanism includes a rotating device, a clamping frame, a positive and negative threaded screw module, a supporting component, a photoelectric switch, a ball screw slide module, a gear pair and a telescopic rod; the rotating device includes a rotating motor and a fixed block, and the gear pair includes an input gear and an output gear; the housing of the rotating motor is fixed to the fixed block, and the output shaft of the rotating motor forms a rotating pair with the fixed block and is fixed to the input gear; the base of the positive and negative threaded screw module is fixed to the fixed block; the two sliders on the positive and negative threaded screw module are both fixed with a clamping frame, and a photoelectric switch is fixed at one end of the clamping frame close to the slider, and a plurality of supporting components arranged in an array are provided in the inward opening of the clamping frame; the supporting component includes a clamping rubber block, a spring and a limit column, one end of the horizontally arranged limit column is fixed to the clamping frame, and the other end extends into the clamping rubber block. The limit hole of the limit column forms a sliding pair with the clamping rubber block, and a spring is sleeved on the limit column, and the two ends of the spring are respectively fixed to the clamping frame and the clamping rubber block; an arc-shaped slide is fixed to the lower surface of the base of the ball screw slide module one, and the arc-shaped slide forms a sliding pair with the frame through a circular slide groove opened on the frame; the telescopic rod one includes a rectangular support rod, a rectangular sleeve rod and a spring two; the slider two on the ball screw slide module one is fixed to the lower end of the vertically arranged rectangular sleeve rod, and a rectangular hole is opened at the upper end of the rectangular sleeve rod; one end of the rectangular support rod extends into the rectangular hole, and forms a sliding pair with the rectangular sleeve rod, and the other end passes through the circular hole opened in the fixed block and is fixed to the lower end of the output gear, and the upper end of the output gear forms a rotating pair with the fixed block, and the output gear is meshed with the input gear; a spring is placed in the rectangular hole, and the two ends of the spring two are in contact with the lower ends of the rectangular sleeve rod and the rectangular support rod respectively;

[0009] The multi-block workbench mechanism comprises two photoelectric switches, a workbench frame and two support assemblies; the workbench frame and the machine frame form a rotating pair; a photoelectric switch is fixed at a corner of the workbench frame away from the telescopic rod; a plurality of support assemblies arranged in an array are arranged in the upward opening of the workbench frame; the support assembly comprises a workbench rubber block, two limiting columns and three springs; one end of the vertically arranged two limiting columns is fixed to the workbench frame, and the other end extends into the limiting hole provided on the workbench rubber block, forming a sliding pair with the workbench rubber block, and a three spring is sleeved on the two limiting columns, and the two ends of the three springs are respectively fixed to the workbench frame and the workbench rubber block;

[0010] The cylinder rotating device is located directly above the multi-block workbench mechanism, and includes a rotating motor 2, a rotating disk, a cylinder 1, a cylinder 2 and a connecting rod; the housing of the rotating motor 2 is fixed to the frame, and the output shaft of the rotating motor 2 is fixed to the rotating disk; cylinders 1 and 2 are spaced apart; pressure sensors are provided on the bottom surfaces of the piston rods of cylinders 1 and 2; the housings of cylinders 1 and 2 form sliding pairs with the slideways on the rotating disk, and are fixed to the slideways by screws; the upper end of the vertically arranged connecting rod is fixed to the rotating disk, and the lower end is fixed to the workbench frame through a notch provided in the fixing block; wherein the central axes of cylinders 1, 2 and the connecting rod are coplanar, and the central axis of the output shaft of the rotating motor 2 is coaxial with the rotation centerline of the workbench frame;

[0011] The automatic marking mechanism includes a screw pair, a ball screw slide module 2, an ink storage cartridge and an inkjet nozzle; two ball screw slide modules 2 are fixed on the frame at a horizontal interval; the screw pair includes a screw 1 and a nut block constituting a spiral pair; the screw 1 is vertically arranged and fixed to the output shaft of the rotating motor 3; the housing of the rotating motor 3 and the transverse slide groove opened on the frame constitute a sliding pair, the bottom end of the screw 1 and the slider 3 of one of the ball screw slide modules 2 constitute a rotating pair, and the slider 3 of the other ball screw slide module 2 is fixed with a vertically arranged A polished rod; a slider four and the polished rod form a sliding pair, and the nut block of the screw pair is fixed to the slider four through a connecting block; an ink storage box is fixed on the connecting block, and an inkjet nozzle is fixed on the ink storage box; the inkjet nozzle faces the multi-block workbench mechanism and is connected to the inner cavity of the ink storage box; a distance sensor is also fixed on the ink storage box; the automatic marking mechanism is provided with two spaced-apart mechanisms, and the inkjet nozzles in the two automatic marking mechanisms are relatively inclined; the ink delivery pump in the ink storage and transmission mechanism is connected to the ink storage boxes of the two automatic marking mechanisms through a rubber hose.

[0012] Preferably, the connecting shaft fixed on the upper surface of the output gear is supported on the fixed block through a bearing.

[0013] Preferably, the notch formed on the fixing block comprises a U-shaped notch and a vertical notch, and the vertical notch is connected to the middle position of the U-shaped notch.

[0014] Preferably, the inkjet nozzle is inclined inwardly by 30°.

[0015] Preferably, the ink storage and transmission mechanism includes a rubber hose, an ink filling tube, an ink storage box and an ink pump; the ink storage box is placed in a frame and has an upper end open; the ink filling tube passes through a square hole opened in the frame and is fixed to the frame, and the outlet of the ink filling tube is located above the opening of the ink storage box; the ink pump is fixed in the ink storage box; the input port of the rubber hose is connected to the output end of the ink pump, and the two output ports of the rubber hose pass through the round holes opened in the frame and are connected to the two ink storage boxes respectively.

[0016] Preferably, the transmission and positioning mechanism includes a transmission device, an eight-shaped baffle, a positioning clamp, a photoelectric switch and a lifting device; the transmission device includes a belt transmission mechanism and a U-shaped plate, and the belt transmission mechanism is placed on the horizontally arranged U-shaped plate; initially, the plane where the conveyor belt of the belt transmission mechanism is located is higher than the upper end surface of the multi-block workbench mechanism; the U-shaped plate is located on both sides of the conveyor belt and is hinged with two symmetrically arranged eight-shaped baffles through a hinge shaft, and a torsion spring is sleeved on the hinge shaft, and the two ends of the torsion spring are respectively fixed to the U-shaped plate and the eight-shaped baffle; two positioning clamp groups with spacing are provided on the U-shaped plate at a position closer to the output end than the eight-shaped baffle, and the positioning clamp group includes two positioning clamps located on both sides of the conveyor belt and symmetrically arranged, the positioning clamps and the notches opened on the U-shaped plate constitute a sliding pair, and the positioning clamps are fixed to the push-pull rods of the electromagnet; wherein in the positioning clamp group near the output end of the belt transmission mechanism, the two positioning clamps are fixed with photoelectric switches three on the inner side; the frame plate of the lifting device is fixed to the frame, and the lifting plate of the lifting device is fixed to the lower surface of the U-shaped plate.

[0017] More preferably, the lifting device includes a frame plate, a lifting plate, a second lead screw, a second telescopic rod and a fourth rotary motor; the second telescopic rod is provided at three corners of the lifting plate; the second telescopic rod includes a telescopic guide rod and a telescopic sleeve rod; the vertically arranged telescopic guide rod and the telescopic sleeve rod constitute a sliding pair; the telescopic sleeve rod is fixed to the frame plate, and the telescopic guide rod is fixed to the lifting plate; the housing of the fourth rotary motor is fixed at the fourth corner of the lifting plate, and the output shaft of the fourth rotary motor is fixed to the vertically arranged lead screw; the lead screw and the frame plate constitute a spiral pair.

[0018] The present invention provides a marking method for an automatic shoe upper marking machine, which is specifically as follows:

[0019] Step 1. For a batch of shoe uppers with the same shoe shape and equal size to be processed, select any shoe upper, mark the pressure point 1 and the pressure point 2 of the shoe upper, and measure and record the height difference between the pressure point 1 and the pressure point 2 on the shoe upper; then, place the shoe upper with the marked pressure point 1 and the pressure point 2 on the multi-block workbench mechanism, and align the end of the shoe upper facing the automatic marking mechanism with the photoelectric switch 2; adjust the positions of the cylinder 1 and the cylinder 2 on the slideway so that the cylinder 1 and the cylinder 2 are located directly above the pressure point 1 and the pressure point 2 respectively; control the piston rod of the cylinder above the lower one of the pressure point 1 and the pressure point 2 through the controller to push out the height difference between the pressure point 1 and the pressure point 2; then, the controller controls the ink pump to start working, and the ink pump The ink is transported to two ink storage tanks through a rubber hose, and sprayed to both sides of the shoe upper through two inkjet nozzles; the shoe upper is removed, and two track points on the preset track of the upper surface are compared and found to be aligned with the two ink positions on the shoe upper, and the heights of the two track points relative to the lowest point of the shoe upper are determined; finally, the controller controls each rotating motor three to drive each lead screw one, and drives the corresponding connecting block to move through each nut block and slider four, until the height difference between the two inkjet nozzles and the top surface of the workbench rubber block connected to the spring three when the spring three is compressed to the shortest is respectively equal to the height of the corresponding side track points relative to the lowest point of the shoe upper; wherein, the top surface of the workbench rubber block connected to the spring three when the spring three is compressed to the shortest is the position of the lowest point of the shoe upper;

[0020] Step 2: The controller controls the driving motor 4 of the driving belt transmission mechanism to start working, and the belt transmission mechanism conveys the shoe upper. When the shoe upper passes through the two eight-shaped baffles, the two eight-shaped baffles preliminarily adjust the shoe upper. Then, when the shoe upper passes through the positioning clamp group near the output end of the belt transmission mechanism, each photoelectric switch 3 detects that the shoe upper enters the area where the two positioning clamp groups are located. The controller controls each electromagnet to be energized, and the push-pull rod of the electromagnet pushes the positioning clamp to extend and straighten the shoe upper; then the controller controls each electromagnet to be de-energized, and the push-pull rod of the electromagnet drives the positioning clamp to retract;

[0021] Step 3: When the photoelectric switch 1 detects that the shoe upper is between the two clamping frames, the controller controls the driving motor 4 of the driving belt transmission mechanism to stop working, and controls the positive and negative screw rod modules to work, and drives the two clamping frames to move toward each other through the two sliders 1 until the two clamping frames clamp the shoe upper, wherein each clamping rubber block moves toward the inside of the corresponding clamping frame along the corresponding limit column 1 when touching the shoe upper, each spring 1 is compressed, and the reaction force of each spring 1 acts on the shoe upper, so that the clamping rubber block fits the surface of the shoe upper;

[0022] Step 4: The controller controls the lifting device to drive the U-shaped plate to move downward until the bottom surface of the shoe upper is higher than the upper end surface of the U-shaped plate; then the controller controls the rotating motor to start working, the output shaft of the rotating motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° around the central axis of the output gear through the gear pair, thereby driving the forward and reverse screw modules, the shoe upper and the two clamping frames to rotate forward 90°; then the controller controls the driving motor 2 of the ball screw slide module 1 to start working, driving the slider 2 on the ball screw slide module 1 to move in the direction of the multi-block workbench mechanism, thereby driving the rotating device, the clamping frame, the forward and reverse screw modules, the telescopic rod 1 and the shoe upper to move in the direction of the multi-block workbench mechanism; at the same time, the controller controls the lifting device to drive the U-shaped plate to move up and reset;

[0023] Step 5. When the photoelectric switch 2 detects the shoe upper, the controller controls the cylinder 1 and the cylinder 2 to start working through the electromagnetic reversing valve, and the piston rods of the cylinder 1 and the cylinder 2 move downward by the same distance and press against the shoe upper. At the same time, due to the downward force of the piston rods of the cylinder 1 and the cylinder 2, the rectangular support rod drives the shoe upper and the rotating device, the clamping frame, and the positive and negative screw rod modules to move downward, and each workbench rubber block in contact with the shoe upper moves downward along the corresponding limit column 2, and each spring 3 is compressed. The reaction force of the spring 3 makes the workbench rubber block fit with the bottom surface of the shoe upper; when the pressure value of one of the pressure sensors reaches the threshold value, it means that a workbench rubber block is in the lowest position, and the cylinder 1 and the cylinder 2 both stop, so that the difference in the extended length of the piston rods of the cylinder 1 and the cylinder 2 is always equal to the height difference between the pressure point 1 and the pressure point 2, so as to ensure that the shoe upper is placed horizontally after pressure is applied;

[0024] Step six, each distance sensor measures the distance between itself and the shoe upper at this time and feeds it back to the controller, and the controller sets the average of the distance values ​​measured by each distance sensor as the distance control value; then the controller controls the rotating motor 2 to start working, and the output shaft of the rotating motor 2 drives the rotating disk to rotate, thereby causing the rotating disk to drive the cylinder 1, cylinder 2, connecting rod, clamping and transport mechanism, multi-block workbench mechanism and the shoe upper to rotate together around the output shaft of the rotating motor 2; at the same time, the controller controls the ink pump to start working, and the ink pump transports the ink to two ink storage tanks through a rubber hose, and sprays it out through two ink nozzles. The sprayed ink draws lines on the surface of the rotating shoe upper, and at the same time, the controller controls the output shaft of each rotating motor 3 to start reciprocating The controller controls the driving motor three of the corresponding ball screw slide module two to rotate forward and reversely according to the distance value between the distance sensor and the shoe upper, the connecting rod or the telescopic rod one, so that the slider three drives the corresponding lead screw pair, the polished rod, the ink storage box and the inkjet nozzle to move together, ensuring that the distance between each distance sensor and the shoe upper connecting rod or the telescopic rod one is always equal to the distance control value, so that the distance between the inkjet nozzle and the shoe upper, the connecting rod or the telescopic rod one is always kept constant;

[0025] Step 7: After the output shaft of the rotary motor 2 is controlled by the controller to rotate one circle, the upper marking work is completed, and then the controller controls the ink pump, the drive motor 3 and the rotary motor 3 to stop working; then the controller controls the piston rods of the cylinder 1 and the cylinder 2 to move upward and return to the position after executing step 1 through the electromagnetic reversing valve, and at the same time, the rectangular support rod and the fixed block return to the initial height under the action of the restoring force of the spring 2; the controller controls the drive motor 2 to start working, and the ball screw slide module 1 drives the rotating device, the clamping frame, the positive and negative screw modules, and the telescopic Rod member 1 and the shoe upper move in a direction away from the multi-block workbench mechanism, and then the controller controls the rotary motor to start working, the output shaft of the rotary motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° through the gear pair, and then drives the two clamping frames to clamp the shoe upper and rotate forward 90° through the forward and reverse screw rod modules. At this time, the two clamping frames and the shoe upper are located above the shoe frame placed on one side of the frame; finally, the controller controls the driving motor to start working, and the forward and reverse screw rod modules drive the two clamping frames to move in opposite directions until the shoe upper is released, and the shoe upper falls into the shoe frame;

[0026] Step 8: The controller controls the output shaft of the rotating motor 1 to reverse 180°, and drives the fixed block, the positive and negative screw rod module and the two clamping frames to reverse 180° through the gear pair. At this time, the two clamping frames return to their initial positions.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The present invention straightens the shoe upper through the eight-shaped baffle and the positioning clamp group, and then clamps the shoe upper through the clamping and transportation mechanism and rotates it 90 degrees, so that the shoe upper is located on the workbench frame, and then the controller controls the output shafts of the two cylinders to move downward and press the shoe upper, and then the cylinder rotating device drives the clamping and transportation mechanism, the shoe upper, the two cylinders and the multi-block workbench mechanism to rotate together, and at the same time the ink delivery pump draws out the ink and sprays it through the inkjet nozzle to mark the shoe upper. The whole process does not require manual labor, and the clever design ensures that there is no interference between the multi-dimensional movements. Compared with the traditional manually operated marking machine, the present invention realizes automatic precise marking instead of manual marking, which makes up for the problems of product quality decline, raw material loss, and extended production time caused by errors in manual operation, and can effectively improve product quality, improve production efficiency, and reduce production labor costs and time costs.

[0029] 2. The present invention designs a clamping and transporting mechanism by imitating the claws of a swimming crab, so that two clamping frames clamp the shoe upper, and each clamping rubber block is always in contact with the surface of the shoe upper through the restoring force of each spring one, so as to further clamp the shoe upper, and at the same time, the positions of the pressure point one and the pressure point two are determined in advance according to the size of the shoe upper, and the height difference between the two points is measured, and then the difference in the extended length of the piston rods of the cylinder one and the cylinder two is controlled to be equal to the height difference, so that the shoe upper is always kept in a horizontal and straightened state during the marking process, and the reaction force of each spring two is used to make each workbench rubber block close to the shoe upper and the sole, so as to solve the problem of misalignment of the shoe upper foot line caused by the existing loose fit between the shoe upper and the workbench, so that each inkjet nozzle can accurately mark according to the preset trajectory; at the same time, the present invention accurately positions the shoe upper through the photoelectric switch one, the photoelectric switch two and the photoelectric switch three, so as to further reduce the automatic marking errors caused by position deviation.

[0030] 3. The present invention is provided with two inkjet nozzles which are relatively inclined. When one of the inkjet nozzles marks the rotating shoe upper, an unmarked area appears due to the obstruction of the connecting rod and the telescopic rod. The ink sprayed by the other inkjet nozzle supplements the unmarked area to ensure the integrity of the marking. At the same time, since the position size of the shoe upper facing the inkjet nozzle changes all the time during the rotation of the shoe upper, the present invention detects the distance between the distance sensor and the shoe upper, the connecting rod or the telescopic rod and feeds back to the controller, and then controls the forward and reverse rotation of the driving motor of the ball screw slide module 2 through the controller, thereby driving the inkjet nozzle to move, so that the distance between the distance sensor and the shoe upper, the connecting rod or the telescopic component always remains unchanged, thereby ensuring that the distance between the shoe upper and the inkjet nozzle remains unchanged during the rotation, and making the thickness of the marking more uniform.

[0031] 4. The present invention can preset the marking trajectory according to the shoe upper and shoe type, and can determine the positions of the pressure point 1 and the pressure point 2 of the cylinder 1 and the cylinder 2 on the shoe upper according to the shoe upper size, thereby meeting the marking processing requirements of the shoe uppers of the same and different sizes of different shoe types. The operation is convenient, and the adaptability to different shoe types and uppers of different sizes is strong, meeting the current needs of fast updating of shoe styles and fast changes in shoe type and style processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 3 It is a partial structural schematic diagram of the clamping and transporting mechanism in the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the clamping frame, the spring 1, the limit column 1 and the photoelectric switch 1 in the present invention;

[0036] Figure 5 It is a structural schematic diagram of the multi-block workbench mechanism in the present invention;

[0037] Figure 6 It is a structural schematic diagram of the photoelectric switch 2, the workbench frame, the limit column 2 and the spring 3 in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the automatic scribing mechanism in the present invention;

[0039] Figure 8 It is a structural schematic diagram of the ink storage and transmission mechanism of the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the transmission and positioning mechanism in the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] like Figure 1 As shown, the present invention is an automatic shoe upper marking machine, comprising a frame, a clamping and transporting mechanism 1, a multi-block workbench mechanism 2, an ink storage and transmission mechanism 3, an automatic marking mechanism 4, a conveying and positioning mechanism 21 and a cylinder rotating device 27. The clamping and transporting mechanism 1 is located at the output end of the conveying and positioning mechanism 21.

[0043] like Figure 2 , Figure 3 and Figure 4As shown, the clamping and transporting mechanism 1 includes a rotating device 5, a clamping frame 6, a positive and negative threaded screw module 8 (compared with an ordinary ball screw linear module, its screw has two sliders, and the screw has positive and negative teeth, and can realize the movement of the two sliders thereon toward or away from each other), a supporting component 1, a photoelectric switch 11, a ball screw slide module 26, a gear pair and a telescopic rod 1; the rotating device 5 includes a rotating motor 1 and a fixed block, and the gear pair includes an input gear and an output gear; the housing of the rotating motor 1 is fixed to the fixed block, and the output shaft of the rotating motor 1 forms a rotating pair with the fixed block and is fixed to the input gear; the base of the positive and negative threaded screw module 8 is fixed to the fixed block; the two sliders 1 on the positive and negative threaded screw module 8 are both fixed with a clamping frame 6, and a photoelectric switch 11 is fixed to one end of the clamping frame 6 close to the slider 1, and a plurality of supporting components 1 arranged in an array are provided in the inward opening of the clamping frame 6; the supporting component 1 includes a clamping rubber block 7, a spring 9 and a limit column 10, One end of the horizontally arranged limit column 10 is fixed to the clamping frame 6, and the other end extends into the limit hole opened on the clamping rubber block 7, forming a sliding pair with the clamping rubber block 7, and a spring 9 is sleeved on the limit column 10, and the two ends of the spring 9 are respectively fixed to the clamping frame 6 and the clamping rubber block 7; an arc-shaped slide bar is fixed to the lower surface of the base of the ball screw slide module 26, and the arc-shaped slide bar forms a sliding pair with the frame through a circular slide groove opened on the frame; the telescopic rod member includes a rectangular support rod, a rectangular sleeve rod and a spring Spring 2; slider 2 on the ball screw slide module 26 is fixed to the lower end of the vertically arranged rectangular sleeve rod, and a rectangular hole is opened at the upper end of the rectangular sleeve rod; one end of the rectangular support rod extends into the rectangular hole to form a sliding pair with the rectangular sleeve rod, and the other end passes through the circular hole opened in the fixed block and is fixed to the lower end of the output gear, the upper end of the output gear and the fixed block form a rotating pair, and the output gear is meshed with the input gear; Spring 2 is placed in the rectangular hole, and both ends of the spring 2 are in contact with the lower ends of the rectangular sleeve rod and the rectangular support rod respectively.

[0044] like Figure 5 and Figure 6 As shown, the multi-block workbench mechanism 2 includes a photoelectric switch 12, a workbench frame 14 and a support component 2; the workbench frame 14 and the frame form a rotating pair; a photoelectric switch 12 is fixed at a corner of the workbench frame 14 away from the telescopic rod one end; a plurality of support components 2 arranged in an array are provided in the upward opening of the workbench frame 14; the support component 2 includes a workbench rubber block 13, a limiting column 15 and a spring 3 16; one end of the vertically arranged limiting column 15 is fixed to the workbench frame 14, and the other end extends into the limiting hole opened on the workbench rubber block 13, forming a sliding pair with the workbench rubber block 13, and a spring 3 16 is sleeved on the limiting column 15, and the two ends of the spring 3 16 are respectively fixed to the workbench frame 14 and the workbench rubber block 13.

[0045] The cylinder rotating device 27 is located directly above the multi-block workbench mechanism 2, and includes a rotating motor 2, a rotating disk, a cylinder 1, a cylinder 2 and a connecting rod; the shell of the rotating motor 2 is fixed to the frame, and the output shaft of the rotating motor 2 is fixed to the rotating disk; cylinder 1 and cylinder 2 are set at a distance; the bottom surfaces of the piston rods of cylinder 1 and cylinder 2 are both provided with pressure sensors; the shells of cylinder 1 and cylinder 2 both form sliding pairs with the slideway on the rotating disk, and are both fixed to the slideway by screws, so as to facilitate the adjustment of the positions of cylinder 1 and cylinder 2 on the slideway to adapt to shoe uppers of different sizes; the upper end of the vertically arranged connecting rod is fixed to the rotating disk, and the lower end is fixed to the workbench frame 14 through the slot opened in the fixed block; wherein the central axes of cylinder 1, cylinder 2 and the connecting rod are coplanar, and the central axis of the output shaft of the rotating motor 2 is coaxial with the rotation centerline of the workbench frame 14.

[0046] like Figure 7As shown, the automatic marking mechanism 4 includes a screw pair 17, a ball screw slide module 2 18, an ink storage box 19 and an inkjet nozzle 20; two ball screw slide modules 2 18 are fixed on the frame at a horizontal interval; the screw pair 17 includes a screw 1 and a nut block constituting a spiral pair; the screw 1 is vertically arranged and fixed to the output shaft of the rotating motor 3; the housing of the rotating motor 3 and the transverse slide groove opened on the frame constitute a sliding pair, the bottom end of the screw 1 and the slider 3 of one of the ball screw slide modules 2 18 constitute a rotating pair, and a vertically arranged light rod is fixed on the slider 3 of the other ball screw slide module 2 18; the slider 4 and the light rod constitute a sliding pair, and the nut block of the screw pair 17 and The slider 4 is fixed by a connecting block; an ink tank 19 is fixed on the connecting block, and an inkjet nozzle 20 is fixed on the ink tank 19; the inkjet nozzle 20 faces the multi-block workbench mechanism 2 and is connected to the inner cavity of the ink tank 19; a distance sensor is also fixed on the ink tank 19, and the distance sensor is used to detect the distance between the inkjet nozzle 20 and the upper or telescopic rod 1 in a rotating state during the working process, and control the operation of the ball screw slide module 2 18 through a controller to keep the distance between the inkjet nozzle 20 and the upper, telescopic rod 1 or connecting rod constant (when the inkjet nozzle 20 is blocked by the telescopic rod 1 or connecting rod, although it cannot spray on the upper, the distance adjustment will be performed), so that the thickness of the marking is more uniform. The automatic marking mechanism 4 is provided with two spacing settings, and the inkjet nozzles 20 in the two automatic marking mechanisms 4 are relatively tilted. In the present invention, the telescopic rod 1 will inevitably block the inkjet nozzle 20 from spraying ink to the shoe upper when it is close to the inkjet nozzle 20. However, the present invention provides two automatic marking mechanisms 4 and arranges the two inkjet nozzles 20 relatively tilted, so that the part of the shoe upper that is not marked by the first inkjet nozzle 20 due to the shielding of the telescopic rod 1 and the connecting rod can be marked by the second inkjet nozzle 20. The ink delivery pump 25 in the ink storage and transmission mechanism 3 is connected to the ink storage boxes 19 of the two automatic marking mechanisms 4 through the rubber hose 22, continuously providing ink to the ink storage boxes 19, so that the ink in the ink storage boxes 19 is sprayed from the inkjet nozzle 20. The distance between each inkjet nozzle 20 and the rotation center line of the workbench frame 14 is greater than the distance between the telescopic rod 1 and the rotation center line of the workbench frame 14.

[0047] As a preferred embodiment, the connecting shaft fixed on the upper surface of the output gear is supported on the fixed block through a bearing.

[0048] As a preferred embodiment, the notch on the fixed block includes a U-shaped notch and a vertical notch, and the vertical notch is connected to the middle position of the U-shaped notch; the notch on the fixed block is used to prevent interference between the connecting rod and the fixed block during operation.

[0049] As a preferred embodiment, the controller is connected to a human-machine interactive display screen.

[0050] As a preferred embodiment, the ink jet nozzle 20 is inclined inwardly by 30 degrees.

[0051] As a preferred embodiment, Figure 8 As shown, the ink storage and transmission mechanism 3 includes a rubber hose 22, an ink injection tube 23, an ink storage box 24 and an ink delivery pump 25; the ink storage box 24 is placed in the frame and has an upper end open; the ink injection tube 23 passes through a square hole opened on the frame and is fixed to the frame, and the outlet of the ink injection tube 23 is located above the opening of the ink storage box 24; the ink delivery pump 25 is fixed in the ink storage box 24; the input port of the rubber hose 22 is connected to the output end of the ink delivery pump 25, and the two output ports of the rubber hose 22 pass through the round holes opened on the frame and are connected to the two ink storage boxes 19 respectively.

[0052] As a preferred embodiment, Fig. 9 As shown, the conveying and positioning mechanism 21 includes a conveying device 28, an eight-shaped baffle plate 29, a positioning clamp 30, a photoelectric switch 31 and a lifting device. The conveying device 28 includes a belt transmission mechanism and a U-shaped plate, and the belt transmission mechanism is placed on the horizontally arranged U-shaped plate; initially, the plane where the conveyor belt of the belt transmission mechanism is located is higher than the upper end surface of the multi-block workbench mechanism 2; the U-shaped plate is located on both sides of the conveyor belt and is hinged by a hinge shaft with two symmetrically arranged eight-shaped baffles 29, and a torsion spring is sleeved on the hinge shaft, and the two ends of the torsion spring are fixed to the U-shaped plate and the eight-shaped baffle 29 respectively; the U-shaped plate is provided with two spacing-arranged positioning clamp groups at a position closer to the output end than the eight-shaped baffle 29, and the positioning clamp group includes two positioning clamps 30 located on both sides of the conveyor belt and symmetrically arranged, and the positioning clamps 30 and the notches opened on the U-shaped plate constitute a sliding pair, and the positioning clamps 30 are fixed to the push-pull rods of the electromagnet; wherein in the positioning clamp group near the output end of the belt transmission mechanism, the two positioning clamps 30 are fixed with photoelectric switches 31 on the inner side; the frame plate of the lifting device is fixed to the frame, and the lifting plate of the lifting device is fixed to the lower surface of the U-shaped plate.

[0053] More preferably, if Fig. 9 As shown, the lifting device includes a frame plate, a lifting plate, a lead screw 2 32, a telescopic rod 2 33 and a rotating motor 4; telescopic rod 2 33 is provided at three corners of the lifting plate; the telescopic rod 2 33 includes a telescopic guide rod and a telescopic sleeve rod; the vertically arranged telescopic guide rod and the telescopic sleeve rod form a sliding pair; the telescopic sleeve rod is fixed to the frame plate, and the telescopic guide rod is fixed to the lifting plate; the housing of the rotating motor 4 is fixed at the fourth corner of the lifting plate, and the output shaft of the rotating motor 4 is fixed to the vertically arranged lead screw 2 32; the lead screw 2 32 and the frame plate form a spiral pair.

[0054] Among them, cylinder one and cylinder two are connected to the controller through an electromagnetic reversing valve; rotating motor one, driving motor one of the forward and reverse screw module 8, driving motor two of the ball screw slide module one 26, rotating motor two, electromagnetic reversing valve, driving motor three of the ball screw slide module two 18, rotating motor three, ink pump 25, driving motor four of the driving belt transmission mechanism, rotating motor four of the lifting device and the electromagnet are all controlled by the controller; photoelectric switch one, photoelectric switch two, photoelectric switch three and the signal output ends of the pressure sensor are all connected to the controller.

[0055] The present invention provides a marking method for an automatic shoe upper marking machine, which is specifically as follows:

[0056] Step 1: For a batch of shoe uppers of the same shoe type and equal size to be processed, select any shoe upper, mark the pressure point 1 and pressure point 2 of the shoe upper, and measure and record the height difference between the pressure point 1 and pressure point 2 on the shoe upper; then, place the shoe upper with the marked pressure point 1 and pressure point 2 on the multi-block workbench mechanism 2, and align the end of the shoe upper facing the automatic marking mechanism 4 with the photoelectric switch 2 12; adjust the positions of the cylinder 1 and the cylinder 2 on the slideway so that the cylinder 1 and the cylinder 2 are located directly above the pressure point 1 and the pressure point 2, respectively. The piston rod of the cylinder above the lower one of the pressure point 1 and the pressure point 2 is controlled by the controller to push out the height difference between the pressure point 1 and the pressure point 2. Then, the controller controls the ink pump 25 to start working, and the ink pump 25 transports the ink to the two ink storage tanks 19 through the rubber hose 22, and sprays it to both sides of the upper through the two ink nozzles 20; remove the upper, and compare and find two trajectory points on the preset trajectory of the upper surface that are aligned with the two ink positions on the upper, and determine the heights of the two trajectory points relative to the lowest point of the upper. Finally, the controller controls each rotating motor three to drive each lead screw one, and drives the corresponding connecting block to move through each nut block and slider four, until the two inkjet nozzles 20 and the spring three 16 are compressed to the shortest, and the height difference between the top surface of the workbench rubber block 13 connected to the spring three 16 is respectively equal to the height of the corresponding side trajectory point relative to the lowest point of the upper (wherein, the trajectories drawn by the two inkjet nozzles 20 on the surface of the upper are both preset trajectories, but the positions of the two inkjet nozzles 20 correspond to different trajectory points on the preset trajectory, so the initial heights of the two inkjet nozzles 20 are different); wherein, when the spring three 16 is compressed to the shortest, the top surface of the workbench rubber block 13 connected to the spring three 16 is the lowest point of the upper.

[0057] Step 2: The controller controls the driving motor 4 of the belt transmission mechanism to start working, and the belt transmission mechanism transports the shoe upper. When the shoe upper passes through the two eight-shaped baffles 29, the two eight-shaped baffles 29 perform preliminary adjustment on the shoe upper so that the shoe upper is roughly transported in the positive direction. Then, when the shoe upper passes through the positioning clamp group near the output end of the belt transmission mechanism, each photoelectric switch 3 31 detects that the shoe upper enters the area where the two positioning clamp groups are located, and the controller controls each electromagnet to be energized, and the push-pull rod of the electromagnet pushes the positioning clamp 30 to extend and straighten the shoe upper; then the controller controls each electromagnet to be de-energized, and the push-pull rod of the electromagnet drives the positioning clamp 30 to retract.

[0058] Step three, when the photoelectric switch 11 detects that the shoe upper is between the two clamping frames 6, the controller controls the driving motor 4 of the driving belt transmission mechanism to stop working, and controls the positive and negative screw rod modules 8 to work, and drives the two clamping frames 6 to move toward each other through the two sliders 1 until the two clamping frames 6 clamp the shoe upper, and each clamping rubber block 7 moves toward the inside of the corresponding clamping frame 6 along the corresponding limit column 10 when touching the shoe upper, and each spring 9 is compressed. The reaction force of each spring 9 acts on the shoe upper, so that the clamping rubber block 7 fits tightly against the surface of the shoe upper.

[0059] Step 4, the controller controls the lifting device to drive the U-shaped plate to move downward until the bottom surface of the shoe upper is higher than the upper end surface of the U-shaped plate; then the controller controls the rotating motor to start working, the output shaft of the rotating motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° around the central axis of the output gear through the gear pair, thereby driving the forward and reverse screw module 8, the shoe upper and the two clamping frames 6 to rotate forward 90°; then the controller controls the driving motor 2 of the ball screw slide module 1 26 to start working, driving the slider 2 on the ball screw slide module 1 26 to move in the direction of the multi-block workbench mechanism 2, thereby driving the rotating device 5, the clamping frame 6, the forward and reverse screw module 8, the telescopic rod 1 and the shoe upper to move in the direction of the multi-block workbench mechanism 2; at the same time, the controller controls the lifting device to drive the U-shaped plate to move up and reset.

[0060] Step five, when the photoelectric switch 2 12 detects the shoe upper, the controller controls the cylinder 1 and the cylinder 2 to start working through the electromagnetic reversing valve, and the piston rods of the cylinder 1 and the cylinder 2 move downward by the same distance and press against the shoe upper. At the same time, due to the downward force of the piston rods of the cylinder 1 and the cylinder 2, the rectangular support rod drives the shoe upper and the rotating device 5, the clamping frame 6, and the positive and negative threaded rod module 8 to move downward, and each workbench rubber block 13 in contact with the shoe upper moves downward along the corresponding limit column 2 15, and each spring three 16 is compressed. The reaction force of the spring three 16 makes the workbench rubber block 13 fit tightly against the bottom surface of the shoe upper. When the pressure value of one of the pressure sensors reaches the threshold value (the clamping force of the clamping and transport mechanism 1 on the shoe upper should be greater than the threshold value, and the sum of the pressures of the multi-block workbench mechanism 2 and spring 2 on the shoe upper is less than the threshold value), it means that the workbench rubber block 13 is in the lowest position, and cylinder 1 and cylinder 2 are both stopped. In this way, the difference in the extended length of the piston rods of cylinder 1 and cylinder 2 is always equal to the difference in height between pressure point 1 and pressure point 2, ensuring that the shoe upper is placed horizontally after pressure is applied.

[0061] Step six, each distance sensor measures the distance between itself and the shoe upper at this time and feeds it back to the controller, and the controller sets the average of the distance values ​​measured by each distance sensor as the distance control value; then the controller controls the rotating motor 2 to start working, and the output shaft of the rotating motor 2 drives the rotating disk to rotate, thereby causing the rotating disk to drive the cylinder 1, the cylinder 2, the connecting rod, the clamping and transporting mechanism 1, the multi-block workbench mechanism 2 and the shoe upper to rotate together around the output shaft of the rotating motor 2; at the same time, the controller controls the ink pump 25 to start working, and the ink pump 25 transports the ink to the two ink storage tanks 19 through the rubber hose 22, and sprays it through the two inkjet nozzles 20, and the sprayed ink is used to draw lines on the surface of the rotating shoe upper, and at the same time, the controller controls the output shaft of each rotating motor 3 to start reciprocating forward and reverse rotation, thereby driving each lead screw to start reciprocating forward and reverse rotation, and driving the corresponding connecting block to move up and down through each nut block and the slider 4, so that the ink sprayed by the two inkjet nozzles 20 draws lines on the surface of the shoe upper according to the preset trajectory. During the marking process, the controller controls the forward and reverse rotation of the driving motor three of the corresponding ball screw slide module 2 18 according to the distance value between each distance sensor and the shoe upper, connecting rod or telescopic rod one (the slider three of the ball screw slide module 2 18 is not initially located at the rightmost end), so that the slider three drives the corresponding screw pair 17, light rod, ink storage box 19 and inkjet nozzle 20 to move together, ensuring that the distance between each distance sensor and the shoe upper connecting rod or telescopic rod one is always equal to the distance control value, so that the distance between the inkjet nozzle 20 and the shoe upper, connecting rod or telescopic rod one is always kept constant, and the thickness of the marking is more uniform.

[0062] Step 7: After the output shaft of the rotary motor 2 is controlled by the controller to rotate one circle, the upper marking work is completed, and then the controller controls the ink pump 25, the drive motor 3 and the rotary motor 3 to stop working; then the controller controls the piston rods of the cylinder 1 and the cylinder 2 to move upward back to the position after executing step 1 through the electromagnetic reversing valve, and at the same time, the rectangular support rod and the fixed block return to the initial height under the restoring force of the spring 2; the controller controls the drive motor 2 to start working, and the ball screw slide module 1 26 drives the rotating device 5, the clamping frame 6, the positive and negative screw rod module 8, and the telescopic Rod member 1 and the shoe upper move in the direction away from the multi-block workbench mechanism 2, and then the controller controls the rotating motor to start working, the output shaft of rotating motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° through the gear pair, and then drives the two clamping frames 6 to clamp the shoe upper and rotate forward 90° through the forward and reverse screw rod module 8. At this time, the two clamping frames 6 and the shoe upper are located above the shoe frame placed on one side of the frame; finally, the controller controls the driving motor to start working, and the forward and reverse screw rod module 8 drives the two clamping frames 6 to move away from each other until the shoe upper is released, and the shoe upper falls into the shoe frame.

[0063] Step 8: The controller controls the output shaft of the rotary motor 1 to reverse 180°, and drives the fixed block, the positive and negative screw rod module 8 and the two clamping frames 6 to reverse 180° through the gear pair. At this time, the two clamping frames 6 return to their initial positions.

[0064] Repeat steps 2 to 8 to continuously mark the shoe upper transmitted by the belt transmission mechanism (the shoe upper transmitted by the belt transmission mechanism does not need to be marked with the first and second pressure points).

Claims

1. An automatic shoe upper marking machine, comprising a frame, a multi-block workbench mechanism and a cylinder rotating device, characterized in that: It also includes a clamping and transporting mechanism, an ink storage and transmission mechanism, an automatic marking mechanism and a transmission positioning mechanism; the clamping and transporting mechanism includes a rotating device, a clamping frame, a positive and negative threaded screw module, a support component, a photoelectric switch, a ball screw slide module, a gear pair and a telescopic rod; the rotating device includes a rotating motor and a fixed block, and the gear pair includes an input gear and an output gear; the housing of the rotating motor is fixed to the fixed block, and the output shaft of the rotating motor forms a rotating pair with the fixed block and is fixed to the input gear; the base of the positive and negative threaded screw module is fixed to the fixed block; the two sliders on the positive and negative threaded screw module are both fixed with a clamping frame, and a photoelectric switch is fixed to one end of the clamping frame close to the slider, and a plurality of support components arranged in an array are provided in the inward opening of the clamping frame; the support component includes a clamping rubber block, a spring and a limit column, and one end of the horizontally arranged limit column is fixed to the clamp The support frame is fixed, and the other end extends into the limiting hole opened on the clamping rubber block to form a sliding pair with the clamping rubber block, and a spring 1 is sleeved on the limiting column 1, and the two ends of the spring 1 are respectively fixed to the clamping frame and the clamping rubber block; an arc-shaped slide bar is fixed to the lower surface of the base of the ball screw slide module 1, and the arc-shaped slide bar forms a sliding pair with the frame through a circular slide groove opened on the frame; the telescopic rod 1 includes a rectangular support rod, a rectangular sleeve rod and a spring 2; the slider 2 on the ball screw slide module 1 is fixed to the lower end of the vertically arranged rectangular sleeve rod, and a rectangular hole is opened at the upper end of the rectangular sleeve rod; one end of the rectangular support rod extends into the rectangular hole to form a sliding pair with the rectangular sleeve rod, and the other end passes through the circular hole opened in the fixed block and is fixed to the lower end of the output gear, the upper end of the output gear and the fixed block form a rotating pair, and the output gear is meshed with the input gear; a spring 2 is placed in the rectangular hole, and the two ends of the spring 2 are respectively in contact with the lower ends of the rectangular sleeve rod and the rectangular support rod; The multi-block workbench mechanism comprises two photoelectric switches, a workbench frame and two support assemblies; the workbench frame and the machine frame form a rotating pair; a photoelectric switch is fixed at a corner of the workbench frame away from the telescopic rod; a plurality of support assemblies arranged in an array are arranged in the upward opening of the workbench frame; the support assembly comprises a workbench rubber block, two limiting columns and three springs; one end of the vertically arranged two limiting columns is fixed to the workbench frame, and the other end extends into the limiting hole provided on the workbench rubber block, forming a sliding pair with the workbench rubber block, and a three spring is sleeved on the two limiting columns, and the two ends of the three springs are respectively fixed to the workbench frame and the workbench rubber block; The cylinder rotating device is located directly above the multi-block workbench mechanism, and includes a rotating motor 2, a rotating disk, a cylinder 1, a cylinder 2 and a connecting rod; the housing of the rotating motor 2 is fixed to the frame, and the output shaft of the rotating motor 2 is fixed to the rotating disk; cylinders 1 and 2 are spaced apart; pressure sensors are provided on the bottom surfaces of the piston rods of cylinders 1 and 2; the housings of cylinders 1 and 2 form sliding pairs with the slideways on the rotating disk, and are fixed to the slideways by screws; the upper end of the vertically arranged connecting rod is fixed to the rotating disk, and the lower end is fixed to the workbench frame through a notch provided in the fixing block; wherein the central axes of cylinders 1, 2 and the connecting rod are coplanar, and the central axis of the output shaft of the rotating motor 2 is coaxial with the rotation centerline of the workbench frame; The automatic marking mechanism includes a screw pair, a ball screw slide module 2, an ink storage cartridge and an inkjet nozzle; two ball screw slide modules 2 are fixed on the frame at a horizontal interval; the screw pair includes a screw 1 and a nut block constituting a spiral pair; the screw 1 is vertically arranged and fixed to the output shaft of the rotating motor 3; the housing of the rotating motor 3 and the transverse slide groove opened on the frame constitute a sliding pair, the bottom end of the screw 1 and the slider 3 of one of the ball screw slide modules 2 constitute a rotating pair, and the slider 3 of the other ball screw slide module 2 is fixed with a vertically arranged A polished rod; a slider four and the polished rod form a sliding pair, and the nut block of the screw pair is fixed to the slider four through a connecting block; an ink storage box is fixed on the connecting block, and an inkjet nozzle is fixed on the ink storage box; the inkjet nozzle faces the multi-block workbench mechanism and is connected to the inner cavity of the ink storage box; a distance sensor is also fixed on the ink storage box; the automatic marking mechanism is provided with two spaced-apart inkjet nozzles, and the inkjet nozzles in the two automatic marking mechanisms are relatively inclined; the ink delivery pump in the ink storage and transmission mechanism is connected to the ink storage boxes of the two automatic marking mechanisms through a rubber hose.

2. The automatic shoe upper marking machine according to claim 1, characterized in that: The connecting shaft fixed on the upper surface of the output gear is supported on the fixing block through a bearing.

3. The automatic shoe upper marking machine according to claim 1, characterized in that: The notch formed on the fixing block comprises a U-shaped notch and a vertical notch, and the vertical notch is connected to the middle position of the U-shaped notch.

4. The automatic shoe upper marking machine according to claim 1, characterized in that: The ink jet nozzles are inclined inwardly by 30°.

5. The automatic shoe upper marking machine according to claim 1, characterized in that: The ink storage and transmission mechanism includes a rubber hose, an ink injection tube, an ink storage box and an ink delivery pump; the ink storage box is placed in a frame and has an upper end open; the ink injection tube passes through a square hole opened on the frame and is fixed to the frame, and the outlet of the ink injection tube is located above the opening of the ink storage box; the ink delivery pump is fixed in the ink storage box; the input port of the rubber hose is connected to the output end of the ink delivery pump, and the two output ports of the rubber hose pass through the round holes opened on the frame and are connected to the two ink storage boxes respectively.

6. The automatic shoe upper marking machine according to claim 5, characterized in that: The transmission and positioning mechanism comprises a transmission device, an eight-shaped baffle, a positioning clamp, a photoelectric switch and a lifting device; the transmission device comprises a belt transmission mechanism and a U-shaped plate, and the belt transmission mechanism is placed on the horizontally arranged U-shaped plate; initially, the plane where the conveyor belt of the belt transmission mechanism is located is higher than the upper end surface of the multi-block workbench mechanism; the U-shaped plate is located on both sides of the conveyor belt and is hinged with two symmetrically arranged eight-shaped baffles through a hinge shaft, and a torsion spring is sleeved on the hinge shaft, and the two ends of the torsion spring are respectively fixed to the U-shaped plate and the eight-shaped baffle; two positioning clamp groups with spacing are provided on the U-shaped plate at a position closer to the output end than the eight-shaped baffle, and the positioning clamp group comprises two positioning clamps located on both sides of the conveyor belt and symmetrically arranged, the positioning clamps and the notches opened on the U-shaped plate constitute a sliding pair, and the positioning clamps are fixed to the push-pull rods of the electromagnet; wherein in the positioning clamp group close to the output end of the belt transmission mechanism, the two positioning clamps are fixed with a photoelectric switch three on the inner side; the frame plate of the lifting device is fixed to the frame, and the lifting plate of the lifting device is fixed to the lower surface of the U-shaped plate.

7. The automatic shoe upper marking machine according to claim 6, characterized in that: The lifting device includes a frame plate, a lifting plate, a second lead screw, a second telescopic rod and a fourth rotating motor; the second telescopic rod is provided at three corners of the lifting plate; the second telescopic rod includes a telescopic guide rod and a telescopic sleeve rod; the vertically arranged telescopic guide rod and the telescopic sleeve rod form a sliding pair; the telescopic sleeve rod is fixed to the frame plate, and the telescopic guide rod is fixed to the lifting plate; the housing of the fourth rotating motor is fixed at the fourth corner of the lifting plate, and the output shaft of the fourth rotating motor is fixed to the vertically arranged lead screw; the lead screw and the frame plate form a spiral pair.

8. The marking method of the shoe upper automatic marking machine according to claim 6, characterized in that: The details are as follows: Step 1. For a batch of shoe uppers with the same shoe shape and equal size to be processed, select any shoe upper, mark the pressure point 1 and the pressure point 2 of the shoe upper, and measure and record the height difference between the pressure point 1 and the pressure point 2 on the shoe upper; then, place the shoe upper with the marked pressure point 1 and the pressure point 2 on the multi-block workbench mechanism, and align the end of the shoe upper facing the automatic marking mechanism with the photoelectric switch 2; adjust the positions of the cylinder 1 and the cylinder 2 on the slideway so that the cylinder 1 and the cylinder 2 are located directly above the pressure point 1 and the pressure point 2 respectively; control the piston rod of the cylinder above the lower one of the pressure point 1 and the pressure point 2 through the controller to push out the height difference between the pressure point 1 and the pressure point 2; then, the controller controls the ink pump to start working, and the ink pump The ink is transported to two ink storage boxes through a rubber hose, and sprayed to both sides of the shoe upper through two inkjet nozzles; the shoe upper is removed, and two track points on the preset track of the upper surface are compared and found to be aligned with the two ink positions on the shoe upper, and the heights of the two track points relative to the lowest point of the shoe upper are determined; finally, the controller controls each rotating motor three to drive each lead screw one, and drives the corresponding connecting block to move through each nut block and slider four, until the height difference between the two inkjet nozzles and the top surface of the workbench rubber block connected to the spring three when the spring three is compressed to the shortest is respectively equal to the height of the corresponding side track points relative to the lowest point of the shoe upper; wherein, the top surface of the workbench rubber block connected to the spring three when the spring three is compressed to the shortest is the position of the lowest point of the shoe upper; Step 2: The controller controls the driving motor 4 of the driving belt transmission mechanism to start working, and the belt transmission mechanism conveys the shoe upper. When the shoe upper passes through the two eight-shaped baffles, the two eight-shaped baffles preliminarily adjust the shoe upper. Then, when the shoe upper passes through the positioning clamp group near the output end of the belt transmission mechanism, each photoelectric switch 3 detects that the shoe upper enters the area where the two positioning clamp groups are located. The controller controls each electromagnet to be energized, and the push-pull rod of the electromagnet pushes the positioning clamp to extend and straighten the shoe upper; then the controller controls each electromagnet to be de-energized, and the push-pull rod of the electromagnet drives the positioning clamp to retract; Step 3: When the photoelectric switch 1 detects that the shoe upper is between the two clamping frames, the controller controls the driving motor 4 of the driving belt transmission mechanism to stop working, and controls the positive and negative screw rod modules to work, and drives the two clamping frames to move toward each other through the two sliders 1 until the two clamping frames clamp the shoe upper, wherein each clamping rubber block moves toward the inside of the corresponding clamping frame along the corresponding limit column 1 when touching the shoe upper, each spring 1 is compressed, and the reaction force of each spring 1 acts on the shoe upper, so that the clamping rubber block fits the surface of the shoe upper; Step 4: The controller controls the lifting device to drive the U-shaped plate to move downward until the bottom surface of the shoe upper is higher than the upper end surface of the U-shaped plate; then the controller controls the rotating motor to start working, the output shaft of the rotating motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° around the central axis of the output gear through the gear pair, thereby driving the forward and reverse screw modules, the shoe upper and the two clamping frames to rotate forward 90°; then the controller controls the driving motor 2 of the ball screw slide module 1 to start working, driving the slider 2 on the ball screw slide module 1 to move in the direction of the multi-block workbench mechanism, thereby driving the rotating device, the clamping frame, the forward and reverse screw modules, the telescopic rod 1 and the shoe upper to move in the direction of the multi-block workbench mechanism; at the same time, the controller controls the lifting device to drive the U-shaped plate to move up and reset; Step 5. When the photoelectric switch 2 detects the shoe upper, the controller controls the cylinder 1 and the cylinder 2 to start working through the electromagnetic reversing valve. The piston rods of the cylinder 1 and the cylinder 2 move downward by the same distance and press against the shoe upper. At the same time, due to the downward force of the piston rods of the cylinder 1 and the cylinder 2, the rectangular support rod drives the shoe upper and the rotating device, the clamping frame, and the positive and negative screw rod module to move downward. The rubber blocks of each workbench in contact with the shoe upper move downward along the corresponding limit column 2. Each spring 3 is compressed, and the reaction force of the spring 3 makes the rubber block of the workbench fit with the bottom surface of the shoe upper. When the pressure value of one of the pressure sensors reaches the threshold, it means that a rubber block of the workbench is in the lowest position, and both the cylinder 1 and the cylinder 2 stop. Step six, each distance sensor measures the distance between itself and the shoe upper at this time and feeds it back to the controller, and the controller sets the average of the distance values ​​measured by each distance sensor as the distance control value; then the controller controls the rotating motor 2 to start working, and the output shaft of the rotating motor 2 drives the rotating disk to rotate, thereby causing the rotating disk to drive the cylinder 1, cylinder 2, connecting rod, clamping and transporting mechanism, multi-block workbench mechanism and the shoe upper to rotate together around the output shaft of the rotating motor 2; at the same time, the controller controls the ink pump to start working, and the ink pump transports the ink to the two ink storage boxes through the rubber hose, and sprays it out through the two ink nozzles. The sprayed ink draws lines on the surface of the rotating shoe upper, and at the same time, the controller controls the output shaft of each rotating motor 3 to start reciprocating The controller controls the driving motor three of the corresponding ball screw slide module two to rotate forward and reversely according to the distance value between the distance sensor and the shoe upper, the connecting rod or the telescopic rod one, so that the slider three drives the corresponding lead screw pair, the polished rod, the ink storage box and the inkjet nozzle to move together, ensuring that the distance between each distance sensor and the shoe upper connecting rod or the telescopic rod one is always equal to the distance control value, so that the distance between the inkjet nozzle and the shoe upper, the connecting rod or the telescopic rod one is always kept constant; Step 7: After the output shaft of the rotary motor 2 is controlled by the controller to rotate one circle, the upper marking work is completed, and then the controller controls the ink pump, the drive motor 3 and the rotary motor 3 to stop working; then the controller controls the piston rods of the cylinder 1 and the cylinder 2 to move upward and return to the position after executing step 1 through the electromagnetic reversing valve, and at the same time, the rectangular support rod and the fixed block return to the initial height under the action of the restoring force of the spring 2; the controller controls the drive motor 2 to start working, and the ball screw slide module 1 drives the rotating device, the clamping frame, the positive and negative screw modules, and the telescopic Rod member 1 and the shoe upper move in a direction away from the multi-block workbench mechanism, and then the controller controls the rotary motor to start working, the output shaft of the rotary motor 1 rotates forward 90°, and drives the fixed block to rotate forward 90° through the gear pair, and then drives the two clamping frames to clamp the shoe upper and rotate forward 90° through the forward and reverse screw rod modules. At this time, the two clamping frames and the shoe upper are located above the shoe frame placed on one side of the frame; finally, the controller controls the driving motor to start working, and the forward and reverse screw rod modules drive the two clamping frames to move in opposite directions until the shoe upper is released, and the shoe upper falls into the shoe frame; Step 8: The controller controls the output shaft of the rotating motor 1 to reverse 180°, and drives the fixed block, the positive and negative screw rod module and the two clamping frames to reverse 180° through the gear pair. At this time, the two clamping frames return to their initial positions.

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