A tape guide rectifying device for a spray plotter

Abstract

The application belongs to the technical field of inkjet printers, and specifically provides a guide tape deviation rectifying device for an inkjet printer, which comprises a rack, a tensioning roller, a deviation rectifier and a conveying guide tape. The tensioning roller is arranged on the inner side wall of the rack, the conveying guide tape is arranged around the tensioning roller, the deviation rectifier is arranged on the inner side wall of the rack, the deviation rectifier comprises a deviation driving element and a deviation roller, the deviation driving element is arranged on the inner side wall of the rack, one end of the deviation roller is movably arranged on the deviation driving element, the other end of the deviation roller is hingedly arranged on the inner side wall of the rack, and the deviation roller is located below the conveying guide tape. The deviation roller with an offset angle is adopted to perform pressure rolling contact on the conveying guide tape, the movement direction deviation caused by the angle deviation is used to form a friction rubbing effect, so that the correction and deviation rectification of the conveying guide tape are realized, the automatic control of the deviation roller is realized by means of the photoelectric sensing assembly, and the conveying guide tape can be accurately kept in a predetermined interval and reverse deviation of the conveying guide tape is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of inkjet printers, and particularly relates to a guide belt deviation rectifying device for an inkjet printer. BACKGROUND

[0002] During long-time work, the inkjet printer often deviates due to uneven force on both ends of the conveying guide belt, and the inkjet cloth is directly placed on the conveying guide belt, so that the deviation of the conveying guide belt drives the inkjet cloth to deviate from the printing area, thereby affecting the printing quality of the inkjet cloth.

[0003] At present, various technologies can rectify the deviation of the conveying guide belt of the inkjet printer, such as setting a baffle on both sides of the conveying guide belt to prevent deviation, monitoring the deviation of the guide belt through a sensor, rectifying the conveying guide belt by adjusting the tension of the conveying guide belt, and the like, but the following problems generally exist.

[0004] (1) The baffle type deviation prevention technology cannot automatically rectify the deviation, and the conveying guide belt still has the possibility of deviation, when the conveying guide belt slightly deviates, one side of the conveying guide belt will contact and press the baffle, so that the edge of the conveying guide belt is bent and deformed, and the conveying guide belt may be suddenly dislocated and damaged;

[0005] (2) The way of adjusting the tension of the conveying guide belt is difficult to accurately control, after the tension changes, the conveying guide belt will gradually deviate in the opposite direction to realize rectification, but how to accurately keep the conveying guide belt in the predetermined interval and avoid the reverse deviation of the conveying guide belt needs a more complex control system to control;

[0006] (3) The rectification roller is continuously pressed against the conveying guide belt, and the conveying guide belt can be quickly rectified by being guided at a certain angle, but during the movement of the rectification roller, uneven friction and pulling force are generated on the conveying guide belt. SUMMARY

[0007] In view of the above technical problems, the application provides a guide belt deviation rectifying device for an inkjet printer, which adopts a rectification roller with a deviation angle to press and roll contact the conveying guide belt, utilizes the movement direction deviation generated by the angle deviation to form a friction rubbing action, so as to realize the correction and rectification of the conveying guide belt, and simultaneously realizes the automatic control of the rectification roller by means of a photoelectric sensing assembly, and can accurately keep the conveying guide belt in the predetermined interval and avoid the reverse deviation of the conveying guide belt, and by setting the expandable and contractible rectification roller, the rectification roller will not generate uneven friction and pulling force on the conveying guide belt during the deflection process, so that the rectification is more accurate, and the reverse deviation of the conveying guide belt is avoided.

[0008] The technical scheme adopted by the present application is as follows: The present application provides a guide tape deviation correcting device for a spray plotter, which comprises a rack, tensioning rollers, a deviation corrector and a conveying guide tape. The tensioning rollers are arranged on the inner side walls of the rack and are in two groups. The conveying guide tape is arranged around the two groups of tensioning rollers. The deviation corrector is arranged on the inner side wall of the rack and is below the conveying guide tape. A partition is fixedly arranged on the inner side wall of the rack and is in the conveying guide tape. The partition is used for supporting the conveying guide tape and preventing the middle part of the conveying guide tape from being loosened and deformed due to gravity. The lower wall of the partition cooperates with the deviation corrector, so that the deviation corrector can press the conveying guide tape upward. A conveying motor is fixedly arranged on the side wall of the rack. The output shaft of the conveying motor is coaxially and fixedly connected with one end of the tensioning roller. The deviation corrector comprises a deviation driving element, a deviation roller and a photoelectric sensing assembly. The deviation driving element is arranged on the inner side wall of the rack. One end of the deviation roller is movably arranged on the deviation driving element. The other end of the deviation roller is hingedly arranged on the side wall of the rack which is opposite to the deviation driving element. The deviation roller is below the conveying guide tape. The photoelectric sensing assembly is fixedly arranged on the inner side wall of the rack and is below the side edge of the conveying guide tape. The photoelectric sensing assembly is electrically connected with the deviation driving element.

[0009] Further, the deviation driving element comprises a driving motor, a lead screw, a linear guide rail and a sliding block. The driving motor is fixedly arranged on the inner side wall of the rack. The lead screw is fixedly arranged on the output shaft of the driving motor. The linear guide rail is fixedly arranged on the inner side wall of the rack. The linear guide rail is consistent with the axis direction of the lead screw and is parallel to the conveying direction of the conveying guide tape. The sliding block is slidably connected with the linear guide rail. The lead screw is threadedly passed through the sliding block. Two limit switches are symmetrically and fixedly connected with the linear guide rail. The two limit switches are respectively located on the two sides of the sliding block and are correspondingly connected with the sliding block. The movement range of the sliding block is limited by the two limit switches. A strip-shaped hole is formed in the upper wall of the sliding block.

[0010] The deviation roller comprises a fixed shaft, a sleeve, a rubber sleeve, a first folding plate and a second folding plate. The first folding plate and the second folding plate are respectively fixedly connected with the two ends of the fixed shaft. A connecting rod is fixedly arranged on the lower wall of the first folding plate and is movably arranged in the strip-shaped hole. The second folding plate is horizontally rotatably arranged on the inner side wall of the rack. The sleeve is rotatably arranged on the circumferential outer wall of the fixed shaft. The rubber sleeve is fixedly arranged on the circumferential outer wall of the sleeve.

[0011] The deviation corrector further comprises a hydraulic assembly. The hydraulic assembly is arranged on the inner side wall of the rack. The fixed shaft is in a hollow structure. The inner wall of the sleeve and the outer circumferential wall of the fixed shaft form a hydraulic cavity. A liquid flow hole one is formed in the circumferential wall of the fixed shaft. The two ends of the rubber sleeve are fixedly and sealingly connected with the circumferential outer wall of the sleeve. The inner circumferential wall of the middle part of the rubber sleeve is not pasted with the circumferential outer wall of the sleeve. The hydraulic assembly penetrates through the side wall of the second folding plate and is in communication with the inside of the fixed shaft.

[0012] As a preferred scheme of the present application, the sleeve circumferential wall is provided with liquid flow holes two, the hydraulic assembly can press hydraulic oil into the inside of the fixed shaft, the hydraulic oil in the inside of the fixed shaft enters the hydraulic cavity through the liquid flow holes one under the hydraulic action, and is extruded into the space between the sleeve circumferential outer wall and the rubber sleeve inner wall from the liquid flow holes two, so that the rubber sleeve is expanded, the outer diameter of the rubber sleeve is increased, and the rubber sleeve is pressed against the lower wall of the conveying guide belt.

[0013] As another preferred scheme of the present application, the sleeve circumferential wall is provided with a push rod which is slidably arranged through the sleeve circumferential wall, the sliding direction of the push rod is directed to the central axis of the sleeve, and a push piece is fixedly arranged at the outer end of the push rod, the push piece is located between the sleeve circumferential outer wall and the rubber sleeve inner wall, the hydraulic oil in the inside of the fixed shaft enters the hydraulic cavity through the liquid flow holes one under the hydraulic action, the hydraulic pressure in the inside of the hydraulic cavity is increased, the push rod is slid to the outside of the sleeve, the push piece is expanded outward to support the rubber sleeve, so that the outer diameter of the rubber sleeve is increased, and the rubber sleeve is pressed against the lower wall of the conveying guide belt.

[0014] Further, the hydraulic assembly comprises an oil tank, a hydraulic pump and a hydraulic hose, the oil tank is fixedly arranged on the inner side wall of the frame, the hydraulic pump is fixedly arranged on the upper wall of the oil tank, the hydraulic pump is electrically connected with the limit switch, when the limit switch is pressed, the hydraulic pump is powered on, the inlet end of the hydraulic pump is connected with the lower edge of the side wall of the oil tank, the hydraulic hose is connected with the outlet end of the hydraulic pump and the inside of the fixed shaft respectively, and a three-way pipe is fixedly connected in the middle of the hydraulic hose, the three-way pipe is connected with the lower edge of the side wall of the oil tank.

[0015] The photoelectric sensing assembly comprises a positioning plate, a photoelectric sensor one and a photoelectric sensor two, the positioning plate is fixedly connected with the inner side wall of the frame, the photoelectric sensor one and the photoelectric sensor two are fixedly installed on the side wall of the positioning plate, the photoelectric sensor one and the photoelectric sensor two are arranged in a staggered manner, in the normal working state, the edge of the conveying guide belt is located in the area between the light emitting directions of the photoelectric sensor one and the photoelectric sensor two, and the photoelectric sensor one and the photoelectric sensor two are electrically connected with the driving motor through the PLC controller.

[0016] The present application has the following beneficial effects:

[0017] (1) The present application innovatively designs a deviation corrector, the deviation corrector adopts deviation-allowable-angle deviation correction rollers to contact the conveying guide belt in a pressure rolling manner, the motion direction deviation caused by the angle deviation between the deviation correction rollers and the conveying guide belt forms a friction rubbing action, so that the correction and deviation of the conveying guide belt are realized, and the deviation correction rollers are automatically controlled by means of the staggered photoelectric sensors in the photoelectric sensing assembly, the conveying guide belt can be accurately kept in a predetermined interval and the reverse deviation of the conveying guide belt can be avoided.

[0018] (2) In the deviation rectification process, the fixed shaft is deflected, and the rotating speeds of the sleeves at different positions of the fixed shaft are different in the deflection process, thereby adapting to the operation of the conveying guide belt, and the mode of arranging multiple sleeves on the fixed shaft can avoid uneven frictional pulling of the conveying guide belt caused by the same rotating angular speed of each point in the deviation rectification roller in the deviation process;

[0019] (3) The deviation rectification roller is arranged as a hydraulic expansion structure by arranging the hydraulic assembly and cooperating with the deviation rectification roller, so that the deviation rectification roller does not contact the conveying guide belt in the normal spray printing state, and the running resistance of the conveying guide belt is reduced, and when the deviation rectification roller reaches the deviation rectification state, the deviation rectification roller can be automatically expanded and pressed against the conveying guide belt under the hydraulic action, thereby avoiding uneven frictional pulling of the conveying guide belt by the deviation rectification roller in the deviation process, the rubber sleeve is not expanded when the deviation rectification roller is not expanded, and the rubber sleeve is close to the lower wall of the conveying guide belt but does not contact the conveying guide belt under pressure, so that when the deviation rectification roller is deflected, there is no contact and friction between the deviation rectification roller and the conveying guide belt, which also makes the deviation rectification roller not produce frictional pulling with the conveying guide belt in the deflection process before the deviation rectification starts, and the deviation rectification roller can restore the contraction state immediately after the deviation rectification is completed, so that the friction between the deviation rectification roller and the conveying guide belt does not occur in the reverse deflection process of the deviation rectification roller, and the deviation rectification is more accurate and does not cause reverse deviation of the conveying guide belt;

[0020] (4) The limit switch can limit the movement range of the sliding block, thereby limiting the deviation angle of the deviation rectification roller, and the limit switch can also control the automatic operation of the hydraulic assembly, so that the deviation rectification roller can be automatically expanded and pressed against the conveying guide belt under the hydraulic action when the deviation rectification roller reaches the deviation rectification state. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure diagram of a guide belt deviation rectification device for a spray plotter is provided.

[0022] Figure 2 A structure diagram of a guide belt deviation rectification device for a spray plotter is provided.

[0023] Figure 3 A structure diagram of a deviation rectification roller and a deviation rectification roller in example one is provided.

[0024] Figure 4 A main view of the deviation rectification roller in example one is provided.

[0025] Figure 5 A structure diagram of a deviation rectification roller and a hydraulic assembly in example one is provided. Figure 4

[0026] Figure 6 A structure diagram of a deviation rectification roller and a hydraulic assembly in example one is provided.

[0027] ​Figure 7 The half sectional view of the hydraulic assembly in the first embodiment;

[0028] Figure 8 The structural schematic view of the photoelectric sensing assembly in the present application;

[0029] Figure 9 The working state view of the deviation corrector and the conveying guide belt in the first embodiment from the top view;

[0030] Figure 10 The front sectional view of the deviation correction roller in the second embodiment;

[0031] Figure 11 The partial enlarged view of the II part in the Figure 10

[0032] Figure 12 The structural schematic view of the deviation correction roller in the third embodiment.

[0033] In the drawings, the explanations of the respective marks are as follows: 1, frame, 11, partition, 12, screw rod, 13, conveying motor, 2, tension roller, 21, adjusting block, 3, deviation corrector, 31, deviation driving member, 311, driving motor, 312, screw rod, 313, linear guide rail, 314, sliding block, 315, limit switch, 316, strip hole, 32, deviation correction roller, 321, fixed shaft, 322, sleeve, 3221, liquid flow hole two, 3222, push rod, 3223, push piece, 323, rubber sleeve, 324, folding plate one, 325, folding plate two, 326, connecting rod, 327, hydraulic cavity, 328, liquid flow hole one, 33, hydraulic assembly, 331, oil tank, 3311, air hole, 332, hydraulic pump, 333, hydraulic hose, 334, oil pipe one, 335, three-way pipe, 336, oil pipe two, 337, oil retaining ring, 338, small hole, 339, piston plate, 330, strong spring, 34, photoelectric sensing assembly, 341, positioning plate, 342, photoelectric sensor one, 343, photoelectric sensor two, 344, gasket, 4, conveying guide belt;

[0034] Figure 9 In the drawings, (a) is the normal working state, (b) is the state that the conveying guide belt deviates to the right, (c) is the state that the conveying guide belt deviates to the left, the solid arrow (a) direction represents the running direction of the conveying guide belt, the dotted arrow (b) direction represents the direction that the conveying guide belt is corrected.

[0035] The drawings are used to provide further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute the limitation of the present application. DETAILED DESCRIPTION ​​​

[0036] Embodiment one: please refer to Figures 1-9 The embodiment provides a guide tape deviation rectifying device for a plotter, which comprises a rack 1, two sets of tension rollers 2, a deviation rectifier 3 and a conveying guide tape 4. The two sets of tension rollers 2 are arranged on the inner side walls of the rack 1, the conveying guide tape 4 is arranged around the two sets of tension rollers 2, the deviation rectifier 3 is arranged on the inner side wall of the rack 1, the deviation rectifier 3 is located below the conveying guide tape 4, a partition plate 11 is fixed on the inner side wall of the rack 1, the partition plate 11 is located in the conveying guide tape 4, the partition plate 11 is used for supporting the conveying guide tape 4, preventing the middle part of the conveying guide tape 4 from being loosened and deformed due to gravity, and the lower wall of the partition plate 11 is matched with the deviation rectifier 3, so that the deviation rectifier 3 can press the conveying guide tape 4 upwards, one of the tension rollers 2 is rotatably arranged on the inner side wall of the rack 1, and the other tension roller 2 is rotatably provided with an adjusting block 21 at both ends. The adjusting blocks 21 at both ends of the tension roller 2 are slidably connected to the inner wall of the rack 1, a screw rod 12 is rotatably arranged on the rack 1, the screw rod 12 is perpendicular to the axis direction of the tension roller 2, the screw rod 12 is threadedly arranged in the adjusting block 21, the position of the adjusting block 21 can be changed by rotating the screw rod 12, so that the distance between the two tension rollers 2 can be finely adjusted, and then the tension degree of the conveying guide tape 4 on both sides can be adjusted, a conveying motor 13 is fixed on the side wall of the rack 1, the output shaft of the conveying motor 13 is coaxially and fixedly connected with the end part of the tension roller 2 rotatably arranged on the inner side wall of the rack 1, the deviation rectifier 3 comprises a deviation driving part 31, a deviation rectifying roller 32, a hydraulic assembly 33 and a photoelectric sensing assembly 34, the deviation driving part 31 is arranged on the inner side wall of the rack 1, one end of the deviation rectifying roller 32 is movably arranged on the deviation driving part 31, the other end of the deviation rectifying roller 32 is hingedly arranged on the side wall opposite to the deviation driving part 31 in the rack 1, the deviation rectifying roller 32 is located below the conveying guide tape 4, the hydraulic assembly 33 is arranged on the inner side wall of the rack 1, the hydraulic assembly 33 is in through connection with the other end of the deviation rectifying roller 32, the photoelectric sensing assembly 34 is fixedly arranged on the inner side wall of the rack 1, the photoelectric sensing assembly 34 is located below the side edge of the conveying guide tape 4, and the photoelectric sensing assembly 34 is in electrically controlled connection with the deviation driving part 31.

[0037] The offset driving member 31 comprises a driving motor 311, a screw rod 312, a linear guide rail 313 and a sliding block 314. The driving motor 311 is fixedly arranged on the inner side wall of the rack 1. The screw rod 312 is fixedly arranged on the output shaft of the driving motor 311. The linear guide rail 313 is fixedly arranged on the inner side wall of the rack 1. The linear guide rail 313 is consistent with the axial direction of the screw rod 312 and parallel to the conveying direction of the conveying guide belt 4. The sliding block 314 is slidingly connected to the linear guide rail 313. The screw rod 312 is threaded through the sliding block 314. Two limit switches 315 are symmetrically and fixedly connected to the linear guide rail 313. The limit switches 315 are electrically connected to the driving motor 311. The two limit switches 315 are respectively located on the two sides of the sliding block 314 and correspond to the sliding block 314. When the limit switches 315 are touched by the sliding block 314, the driving motor 311 is powered off, thereby limiting the movement range of the sliding block 314. A strip-shaped hole 316 is arranged on the upper wall of the sliding block 314.

[0038] The deviation rectifying roller 32 comprises a fixed shaft 321, a sleeve 322, a rubber sleeve 323, a folding plate one 324 and a folding plate two 325. The folding plate one 324 and the folding plate two 325 are respectively fixedly connected to the two ends of the fixed shaft 321. A connecting rod 326 is fixedly arranged on the lower wall of the folding plate one 324 and movably arranged in the strip-shaped hole 316. The folding plate two 325 is horizontally rotatably arranged on the inner side wall of the rack 1. The fixed shaft 321 is a hollow structure. The sleeve 322 is rotatably sleeved on the circumferential outer wall of the fixed shaft 321. A hydraulic cavity 327 is formed between the inner wall of the sleeve 322 and the outer circumferential wall of the fixed shaft 321. A liquid flow hole one 328 is arranged on the circumferential wall of the fixed shaft 321. The rubber sleeve 323 is fixedly sleeved on the circumferential outer wall of the sleeve 322. The two ends of the rubber sleeve 323 are sealingly and fixedly connected with the circumferential outer wall of the sleeve 322. The middle inner circumferential wall of the rubber sleeve 323 is not pasted with the circumferential outer wall of the sleeve 322. The hydraulic assembly 33 penetrates the side wall of the folding plate two 325 and communicates with the inside of the fixed shaft 321. In the initial state, the rubber sleeve 323 is close to the lower wall of the conveying guide belt 4 but has no pressure contact.

[0039] The hydraulic assembly 33 comprises an oil tank 331, a hydraulic pump 332 and a hydraulic hose 333. The oil tank 331 is fixed to the inner side wall of the rack 1, and the hydraulic pump 332 is fixed to the upper wall of the oil tank 331. The hydraulic pump 332 is in electrically controlled connection with the limit switch 315. When the limit switch 315 is pressed, the hydraulic pump 332 is powered on. The oil pipe I 334 is in through connection between the liquid inlet end of the hydraulic pump 332 and the lower edge of the side wall of the oil tank 331. The hydraulic hose 333 is in through fixed connection with the liquid outlet end of the hydraulic pump 332 and the folding plate II 325 respectively. The hydraulic hose 333 penetrates through the side wall of the folding plate II 325 and is in communication with the inside of the fixed shaft 321. The three-way pipe 335 is in through fixed connection with the middle part of the hydraulic hose 333. The oil pipe II 336 is in through connection between the three-way pipe 335 and the lower edge of the side wall of the oil tank 331. The oil baffle 337 is fixedly arranged in the oil pipe II 336. The small hole 338 is arranged in the middle part of the oil baffle 337. The piston plate 339 is slidably arranged on the inner wall of the oil tank 331. The strong spring 330 is arranged in the oil tank 331. The upper end of the strong spring 330 is fixedly connected with the lower wall of the piston plate 339. The lower end of the strong spring 330 is fixedly connected with the inner bottom wall of the oil tank 331. The air hole 3311 is arranged on the upper wall of the oil tank 331. The hydraulic oil is filled below the piston plate 339 in the oil tank 331.

[0040] The circumferential wall of the sleeve pipe 322 is provided with the liquid flow hole II 3221. The hydraulic assembly 33 can press the hydraulic oil into the inside of the fixed shaft 321. The hydraulic oil in the inside of the fixed shaft 321 enters the hydraulic cavity 327 through the liquid flow hole I 328 under the hydraulic action, and is squeezed into the space between the circumferential outer wall of the sleeve pipe 322 and the inner wall of the rubber sleeve 323 from the liquid flow hole II 3221. The rubber sleeve 323 is expanded, the outer diameter of the rubber sleeve 323 is increased, and the rubber sleeve 323 is pressed against the lower wall of the conveying belt 4.

[0041] The photoelectric sensing assembly 34 comprises a positioning plate 341, a photoelectric sensor I 342 and a photoelectric sensor II 343. The positioning plate 341 is fixedly connected to the inner side wall of the rack 1. The photoelectric sensor I 342 and the photoelectric sensor II 343 are fixedly installed on the side walls of the positioning plate 341 respectively. The gasket 344 is installed between the side wall of the positioning plate 341 and the photoelectric sensor II 343. The thickness of the gasket 344 is 2 mm. The light emitting directions of the photoelectric sensor I 342 and the photoelectric sensor II 343 are upward. The photoelectric sensor I 342 and the photoelectric sensor II 343 are arranged in a staggered manner by 2 mm through the gasket 344, and the light can be emitted in a staggered manner. In the normal working state, the edge of the conveying belt 4 is located in the area with a width of 2 mm between the light emitting directions of the photoelectric sensor I 342 and the photoelectric sensor II 343. The light of the photoelectric sensor I 342 is blocked by the conveying belt 4 and is powered off. The light of the photoelectric sensor II 343 is not blocked by the conveying belt 4, so as to be in a powered-on state. Figure 9 Part (a).

[0042] When the photoelectric sensor one 342 is no longer blocked by the conveying belt 4, the photoelectric sensor one 342 is powered on, and it is determined that the conveying belt 4 is offset to the left (for example), when the photoelectric sensor two 343 is blocked by the conveying belt 4, the photoelectric sensor two 343 is powered off, and it is determined that the conveying belt 4 is offset to the right (for example), the photoelectric sensor one 342 and the photoelectric sensor two 343 are respectively electrically controlled and connected with the driving motor 311 through the PLC controller. Figure 1 Figure 1 The photoelectric sensor one 342 and the photoelectric sensor two 343 are respectively electrically controlled and connected with the driving motor 311 through the PLC controller.

[0043] The specific working process of the embodiment is as follows:

[0044] First, adjust the equipment, by screwing the screw 12, the position of the adjusting block 21 can be changed, so as to fine-tune the distance between the tensioning rollers 2, and then adjust the tension degree on both sides of the conveying belt 4, so that the conveying belt 4 reaches a balanced state, and the initial state of the correction roller 32 is as shown in part (a) of Figure 9 The axis thereof is perpendicular to the running direction of the conveying belt 4.

[0045] In the normal printing process, the printing cloth is placed on the conveying belt 4, the conveying motor 13 is operated (according to the printing requirement, the conveying motor 13 is intermittently operated), the driving tensioning roller 2 is rotated to drive the conveying belt 4 to run, so as to convey the printing cloth, and since the rubber sleeve 323 is not expanded at this time, it is close to the lower wall of the conveying belt 4 but has no pressure contact.

[0046] When the conveying belt 4 is offset to the right, refer to part (b) of Figure 9 At this time, the conveying belt 4 blocks the photoelectric sensor one 342 and the photoelectric sensor two 343, therefore, the PLC controller issues an instruction to control the driving motor 311 to operate, drive the screw 312 to rotate, drive the sliding block 314 to slide along the linear guide rail 313, the sliding block 314 drives the folding plate one 324 to move through the strip-shaped hole 316 and the connecting rod 326, and makes the correction roller 32 as a whole to be inclined to Figure 9 ​In the state of the middle (b) part, when the slider 314 touches the limit switch 315, the driving motor 311 stops running, the deviation correcting roller 32 keeps the deflection state at this time, at the same time, the hydraulic pump 332 is powered on to run, the hydraulic oil in the oil tank 331 is pumped to the inside of the fixed shaft 321 through the oil pipe one 334 and the hydraulic hose 333, the hydraulic oil in the inside of the fixed shaft 321 enters the hydraulic cavity 327 through the liquid flow hole one 328 under the action of the hydraulic pressure, and then is squeezed into the space between the outer wall of the sleeve 322 and the inner wall of the rubber sleeve 323 from the liquid flow hole two 3221, so that the rubber sleeve 323 is expanded, the outer diameter of the rubber sleeve 323 is increased, and the rubber sleeve 323 is pressed against the lower wall of the conveying guide belt 4, part of the hydraulic oil in the hydraulic hose 333 will enter the oil pipe two 336 through the three-way pipe 335, and then flow back to the oil tank 331 after passing through the small hole 338, due to the setting of the small hole 338, the flow of the hydraulic oil sent by the hydraulic pump 332 is significantly greater than the flow of the hydraulic oil flowing back to the oil tank 331 after passing through the small hole 338 in the initial stage, therefore, the hydraulic pressure in the inside of the fixed shaft 321 will gradually increase, and when the hydraulic pressure in the inside of the fixed shaft 321 reaches the standard, the pressing force between the rubber sleeve 323 and the conveying guide belt 4 reaches the standard, the hydraulic oil will continuously flow back to the oil tank 331 after passing through the small hole 338, and the inside of the fixed shaft 321 can maintain a stable hydraulic pressure, at this time, the friction between the rubber sleeve 323 and the conveying guide belt 4 appears, the operation of the conveying guide belt 4 will drive the rubber sleeve 323 and the sleeve 322 to rotate, because there is a deflection angle between the whole deviation correcting roller 32 and the running direction of the conveying guide belt 4, therefore, there is also a transverse frictional rubbing force between the contact surface of the rubber sleeve 323 and the conveying guide belt 4, specifically, taking the middle (b) part as an example, the conveying guide belt 4 runs upwards, the linear velocity direction of the contact surface between the rubber sleeve 323 and the conveying guide belt 4 is obliquely left and upwards, therefore, the friction between the rubber sleeve 323 and the conveying guide belt 4 will drive the conveying guide belt 4 to gradually run leftwards to adjust, so as to correct the conveying guide belt 4 leftwards; Figure 9

[0047] When the edge of the conveying guide belt 4 passes the photoelectric sensor two 343, the edge of the conveying guide belt 4 enters the area with a width of 2mm between the light emitted by the photoelectric sensor one 342 and the photoelectric sensor two 343, at this time, the PLC controller issues an instruction to control the driving motor 311 to run reversely and restore the initial state, when the driving motor 311 runs reversely, the slider 314 ends the pressing touch on the limit switch 315, then the hydraulic pump 332 is automatically powered off, the pushing force of the strong spring 330 drives the piston plate 339 to move upwards, the gas above the piston plate 339 is discharged through the air hole 3311, so as to pump the hydraulic oil in the inside of the fixed shaft 321 back to the oil tank 331 through the small hole 338, make the rubber sleeve 323 retract to the original state, no longer in pressure contact with the conveying guide belt 4, the deviation correcting roller 32 is driven by the screw rod 312 and the slider 314 to return to the state of the middle (a) part, and complete a deviation correction. Figure 9 ​​

[0048] When the conveying guide belt 4 is offset to the left, referring to part (c) of FIG. 3, both the photoelectric sensor one 342 and the photoelectric sensor two 343 are exposed outside the side edge of the conveying guide belt 4. At this time, the PLC controller issues a command to control the driving motor 311 to operate in reverse, so as to make the deviation correction roller 32 as a whole deviate to the state shown in part (c) of FIG. 3. The remaining process is the same as the deviation correction process described above, and will not be described here. Figure 9 Figure 9

[0049] Embodiment Two: This embodiment is based on Embodiment One, and the difference is that the sleeve 322 in this embodiment has a different structure from that in Embodiment One. Please refer to FIG. 4. In this embodiment, a push rod 3222 is slidably arranged through the circumferential wall of the sleeve 322, and the sliding direction of the push rod 3222 points to the axis of the sleeve 322. A push piece 3223 is fixedly arranged at the outer end of the push rod 3222, and is located between the circumferential outer wall of the sleeve 322 and the inner wall of the rubber sleeve 323. The hydraulic oil in the inner part of the fixed shaft 321 enters the hydraulic cavity 327 through the liquid flow hole one 328 under the action of hydraulic pressure. The hydraulic pressure in the hydraulic cavity 327 increases, which pushes the push rod 3222 to slide outwardly from the sleeve 322, so that the push piece 3223 outwardly expands the rubber sleeve 323, thereby increasing the outer diameter of the rubber sleeve 323 and pressing the rubber sleeve 323 against the lower wall of the conveying guide belt 4. The expansion of the rubber sleeve 323 by the push piece 3223 can improve the service life of the rubber sleeve 323. There is also friction between the push piece 3223 and the rubber sleeve 323. In this way, the push piece 3223 can limit the excessive deformation of the rubber sleeve 323, and prevent the rubber sleeve 323 from being deformed or loosened due to the friction during the deviation correction process. Figures 1-11

[0050] Embodiment Three: This embodiment is based on Embodiment One, and the difference is that the hydraulic assembly 33 is cancelled in this embodiment, and the deviation correction roller 32 also cancels the hydraulic expansion function. The rubber sleeve 323 in the deviation correction roller 32 continuously presses against the lower wall of the conveying guide belt 4.

[0051] As shown in FIG. 5, in this embodiment, the deviation corrector 3 comprises a deviation driving member 31, a deviation correction roller 32, and a photoelectric sensor assembly 34. The deviation driving member 31 is arranged on the inner side wall of the rack 1. One end of the deviation correction roller 32 is movably arranged on the deviation driving member 31, and the other end of the deviation correction roller 32 is hingedly arranged on the side wall opposite to the deviation driving member 31 in the rack 1. The deviation correction roller 32 is located below the conveying guide belt 4. The photoelectric sensor assembly 34 is fixedly arranged on the inner side wall of the rack 1, and is located below the side edge of the conveying guide belt 4. The photoelectric sensor assembly 34 is electrically connected with the deviation driving member 31. Figures 1-12

[0052] ​​​​The correcting roller 32 comprises a fixed shaft 321, sleeve pipes 322, rubber sleeves 323, a folding plate one 324 and a folding plate two 325, the folding plate one 324 and the folding plate two 325 are fixedly connected to two ends of the fixed shaft 321 respectively, a connecting rod 326 is fixedly arranged on a lower wall of the folding plate one 324 and movably arranged in the strip-shaped hole 316, the folding plate two 325 is horizontally rotatably arranged on an inner side wall of the rack 1, five sleeve pipes 322 are arranged side by side, the five sleeve pipes 322 are rotatably arranged on the fixed shaft 321, the rubber sleeve 323 is independently arranged on each sleeve pipe 322, and the rubber sleeve 323 on the outer wall of the sleeve pipe 322 is pressingly attached to the lower wall of the conveying guide belt 4.

[0053] During normal spray printing, the sleeve pipes 322 are always rotated with the conveying guide belt 4, during the correcting process, the drive motor 311 drives the correcting roller 32 to deviate, the sleeve pipes 322 roll and deviate along the lower wall of the conveying guide belt 4, the parallel arrangement of the plurality of sleeve pipes 322 can adapt to different rotating speeds, during the deviation of the fixed shaft 321, the rotating speeds of the sleeve pipes 322 at different positions of the fixed shaft 321 are different (the rolling rotation caused by the deviation movement of the sleeve pipes 322 and the rolling rotation caused by the conveying guide belt 4 are superposed), so as to adapt to the operation of the conveying guide belt 4, therefore, the above-mentioned arrangement of the plurality of sleeve pipes 322 can avoid the uneven frictional pulling effect of the conveying guide belt 4 caused by the same rotating angular velocity of each point of the correcting roller 32 during the deviation.

[0054] The above describes the present application and its embodiments, which is not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto.

Claims

1. A guide belt correction device for an inkjet printer, comprising a frame (1), a tension roller (2), and a conveyor belt (4), wherein the tension roller (2) is disposed on the inner side wall of the frame (1), and the conveyor belt (4) is wound around the tension roller (2), characterized in that: The guide tape deviation correcting device further comprises a deviation corrector (3) arranged on the inner side wall of the rack (1), the deviation corrector (3) comprises a deviation driving member (31), a deviation roller (32) and a photoelectric sensing assembly (34), the deviation driving member (31) is arranged on the inner side wall of the rack (1), one end of the deviation roller (32) is movably arranged on the deviation driving member (31), the other end of the deviation roller (32) is hingedly arranged on the inner side wall of the rack (1), and the photoelectric sensing assembly (34) is fixedly arranged on the inner side wall of the rack (1) and corresponds to the side edge of the conveying guide tape (4). The deviation roller (32) comprises a fixed shaft (321), a sleeve (322), a rubber sleeve (323), a first folding plate (324) and a second folding plate (325), the first folding plate (324) and the second folding plate (325) are fixedly connected to the two ends of the fixed shaft (321) respectively, the first folding plate (324) is movably connected to the deviation driving member (31), the second folding plate (325) is rotatably arranged on the inner side wall of the rack (1), the sleeve (322) is rotatably sleeved on the circumferential outer wall of the fixed shaft (321), and the rubber sleeve (323) is fixedly sleeved on the circumferential outer wall of the sleeve (322). The deviation corrector (3) further comprises a hydraulic assembly (33), the hydraulic assembly (33) is arranged on the inner side wall of the rack (1), the fixed shaft (321) is of a hollow structure, the hydraulic assembly (33) is in communication with the inside of the fixed shaft (321), and the circumferential wall of the fixed shaft (321) is provided with a first liquid flow hole (328), and the circumferential wall of the sleeve (322) is provided with a second liquid flow hole (3221).

2. The guide tape deviation correcting device for an inkjet plotter according to claim 1, wherein: The deviation driving member (31) comprises a driving motor (311), a linear guide rail (313) and a sliding block (314), the driving motor (311) is fixedly arranged on the inner side wall of the rack (1), the linear guide rail (313) is fixedly arranged on the inner side wall of the rack (1), the sliding block (314) is slidably connected to the linear guide rail (313), the driving motor (311) is in transmission connection with the sliding block (314), and two limit switches (315) are symmetrically and fixedly connected to the linear guide rail (313) and located on the two sides of the sliding block (314), and the first folding plate (324) is movably connected to the sliding block (314).

3. The guide tape deviation correcting device for an inkjet plotter according to claim 2, wherein: The two ends of the rubber sleeve (323) are in sealing connection with the circumferential outer wall of the sleeve (322), and the hydraulic assembly (33) injects hydraulic oil into the inside of the fixed shaft (321) when operating.

4. The guide tape deviation correcting device for a inkjet plotter according to claim 3, wherein: The circumferential wall of the sleeve (322) is slidably provided with a push rod (3222), the sliding direction of the push rod (3222) is directed to the central axis of the sleeve (322), the outer end of the push rod (3222) is fixedly provided with a push piece (3223), and the push piece (3223) is located between the circumferential outer wall of the sleeve (322) and the inner wall of the rubber sleeve (323).

5. The guide tape deviation correcting device for a inkjet plotter according to claim 4, wherein: The hydraulic assembly (33) is in electric control connection with the limit switch (315).

6. The guide tape deviation correcting device for a inkjet plotter according to claim 2, wherein: The photoelectric sensing assembly (34) is in electric control connection with the driving motor (311).

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