CN112172328B

CN112172328B - Automatic mechanism of changing of bat printing machine offset head

Info

Publication number: CN112172328B
Application number: CN202011124905.1A
Authority: CN
Inventors: 徐鸣; 陈振杉; 熊德学; 阮旺; 陈晓东
Original assignee: Shenzhen City Jiuhe Silk Screen Equipment Co ltd
Current assignee: Shenzhen City Jiuhe Silk Screen Equipment Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-04-02
Anticipated expiration: 2040-10-20
Also published as: CN112172328A

Abstract

The invention provides an automatic replacing mechanism for a pad printing machine offset head, which comprises: the automatic rubber head replacing device comprises a processing table, a mounting groove and a motor, wherein the surface of the processing table is provided with the mounting groove, the motor is arranged inside the processing table and positioned on the side edge of the mounting groove, a disc-shaped rotatable rubber head library assembly is arranged in the mounting groove, the output end of the motor is fixedly connected with the rotating shaft of the rubber head library assembly, and a positioning mechanism capable of accurately locking the angle of the rubber head library assembly is arranged on the side wall of the mounting groove and positioned below the motor. And optimizing the automation program.

Description

Automatic mechanism of changing of bat printing machine offset head

Technical Field

The invention relates to the technical field of printing equipment, in particular to an automatic replacing mechanism for an offset head of a pad printing machine.

Background

In the surface printing decoration industry, patterns on the surfaces of a large number of soft materials and convex-concave uneven surfaces are printed, a pad printing process is required to be adopted due to the surface shape, high-definition patterns and accurate color register patterns are printed only by the pad printing process, the surface pad printing process almost covers most industrial and civil products, along with the continuous improvement of the product quality requirements, more and more types of products need to be subjected to surface pad printing, but the automatic degree of equipment in the pad printing industry is very low at present, almost all the products are in a semi-automatic single-station production mode, the equipment hardly meets the market requirements of small-batch and multiple types at present, and the automation level of the pad printing machine is to be improved urgently.

Present pad printing machine adopts the processing mode of the nevertheless head of single-station, need to use the lithography apparatus of different head of gluing to the printing pattern demand of difference, if will change the printing head of gluing now comparatively common adopt the manual work to change, the means is comparatively laggard, the operation is comparatively troublesome, but the pad printing machine that can change the head of gluing has automatically been on the market now yet, but its reserve storehouse of head of gluing is planar, need to pair through the printing end of control pad printing machine and the head of gluing position that needs to change, this kind of mode not only needs the more counterpoint procedure of programming, and planar head of gluing reserve storehouse comparatively occupies lithography apparatus's limited space.

Therefore, there is a need to provide a new automatic pad-printing machine head replacement mechanism to solve the above-mentioned problems.

Disclosure of Invention

In order to solve the technical problem, the invention provides an automatic replacing mechanism of the pad printing machine offset head, which saves space and is convenient to operate.

The automatic replacing mechanism for the offset head of the pad printing machine provided by the invention comprises: the surface of the processing table is provided with the mounting groove, the processing table is internally provided with the motor at the side edge of the mounting groove, a disc-shaped rotatable rubber head library assembly is arranged in the mounting groove, the output end of the motor is fixedly connected with the rotating shaft of the rubber head library assembly, the side wall of the mounting groove is arranged below the motor and is provided with a positioning mechanism capable of accurately locking the angle of the rubber head library assembly, the side edge of the positioning mechanism is provided with a controller, the top of the rubber head library assembly is provided with a printing head assembly, the side edge of the printing head assembly is provided with a locking assembly capable of being pushed by an inclined surface, and the motor, the positioning mechanism, the printing head assembly and the locking assembly;

print head assembly includes bed frame, latch mechanism, spread groove, spliced pole and fastening device, bed frame internally mounted has the latch mechanism of scalable pulling regulation, the spread groove has been seted up to bed frame bottom surface symmetry, and the spread groove fit in peg graft and have the spliced pole, latch mechanism and spliced pole cooperation joint, the inside latch mechanism bilateral symmetry that is located of latch mechanism installs fastening device, and fastening device is connected with the latch mechanism transmission.

Preferably, it includes the storehouse dish, accomodates groove, rubber head body, ladder groove, magnetic ball piece, end plate and magnetic ball groove to glue first storehouse subassembly, storehouse dish both sides central point puts and is connected with the rotation of mounting groove inner wall, storehouse dish edge equidistance has been seted up a plurality of grooves of accomodating, accomodate the groove port and seted up the ladder groove, it is provided with the rubber head body to accomodate inslot portion, rubber head body tip is fixed with the end plate, and end plate and ladder groove structure cooperation, end plate bottom surface bilateral symmetry is fixed with the magnetic ball piece, ladder groove bilateral symmetry is fixed with the magnetic ball groove, and magnetic ball piece and magnetic ball groove structure cooperation, spliced pole and end plate fixed connection.

Preferably, the magnetic ball groove and the magnetic ball block are matched to form a semi-sphere, the magnetic ball groove and the magnetic ball block are both made of magnets, and the magnetism of the magnetic ball groove is opposite to that of the magnetic ball block.

Preferably, the clamping mechanism includes holding tank, first electro-magnet, wears groove, crown plate, biography guide hole, steel wire, guide pulley, dodges the groove, the card is held piece and expanding spring, the holding tank has been seted up to bed frame inside, and holding tank internally mounted has first electro-magnet, the groove has been seted up to holding tank bottom, the flexible end of first electro-magnet is fixed with the crown plate, and the crown plate inserts the inslot, the spread groove side has been seted up and has been dodged the groove, and dodge and seted up the biography guide hole between groove and the groove, dodge the inslot and all cooperate and have placed the card and hold the piece, and the card is held the piece and is passed through expanding spring and dodge groove elastic connection, the downthehole steel wire that has been alternate of conduction, and the steel wire both ends respectively with card and hold piece fixed connection, the steel wire passes the crown plate, it installs the.

Preferably, fastening device includes guide slot, compression leg, turn trough and locking board, the guide slot that communicates with the dodge groove is seted up to holding tank bilateral symmetry, be provided with the compression leg in the guide slot, and compression leg and the flexible end fixed connection of first electro-magnet, the card is held a top surface and is seted up the turn trough, and the turn trough internal rotation installs the locking board, compression leg bottom and locking board extrusion contact, the spliced pole side is the complex inclined plane form with the locking board tip.

Preferably, the locking subassembly includes roof, second electro-magnet, sloping block, locking block, lockhole, spout, chute, spacing groove, compression spring and stopper, the roof is fixed at print head assembly top, the second electro-magnet is installed to roof bottom surface side, and the fixed sloping block of flexible of second electro-magnet, it has seted up the spout to accomodate the groove and be close to second electro-magnet one side, and has pegged graft the locking block in the spout, the lockhole has been seted up on the end plate surface, and locking block and lockhole cooperation joint, the spacing groove has been seted up to the spout bottom, the locking block bottom is fixed with the spacing block, and the stopper passes through compression spring and spacing groove elastic connection, the chute has been seted up to the locking block top surface, and chute and sloping block structure cooperation.

Preferably, positioning mechanism includes flexible groove, flexible piece, through-hole, reference column, constant head tank and reset spring, flexible groove has been seted up to processing platform inside, the through-hole that communicates with flexible groove is seted up to the mounting groove side, flexible inslot cooperation is provided with flexible piece, flexible piece fixed surface has reset spring, and flexible piece passes through reset spring and flexible groove elastic connection, flexible piece end fixing has the reference column, and reference column and through-hole slip grafting, the storehouse coils the side and is located to accomodate the groove and correspond the position and seted up the constant head tank, and the reference column tip is the complex sphere with the constant head tank.

Preferably, positioning mechanism still includes micro-gap switch, motor and oval dish, the flexible groove is close to mounting groove one side and installs micro-gap switch, the oval dish is installed to flexible inslot internal rotation, and the pivot end connection of oval dish installs the motor, motor and micro-gap switch electric connection.

Compared with the prior art, the automatic replacing mechanism for the offset head of the pad printing machine has the following beneficial effects:

the invention provides an automatic replacing mechanism for a pad printing machine offset head, which comprises:

1. the rubber head is stored and placed in a multi-station manner through the rubber head library assembly, the driving of a motor is matched for adjusting stations, and the butt joint of the printing head assembly and the locking assembly is matched for use, so that the automatic rubber head replacement is realized, the replacement is more convenient and efficient compared with the traditional manual replacement, and the vertical disc-shaped storage rubber head is adopted, so that the planar space occupation is saved compared with the traditional automatic rubber head replacement equipment;

2. the invention saves the step of programming the moving position of the printing head assembly, is more convenient and faster to operate and optimizes an automation program compared with the traditional planar rubber head storage device;

3. the rubber head piece can be clamped and positioned in a pressing connection through the linkage mode of the clamping mechanism and the fastening mechanism, and the quick and stable double connection and fixation of the rubber head are realized on the basis of automation;

4. through the positioning action of the positioning mechanism on the rubber head warehouse assembly, the angle positioning error caused by the mechanical transmission mode for the rubber head warehouse assembly is effectively overcome, so that the station adjustment of the rubber head warehouse assembly is more accurate, and the failure rate in the rubber head replacement process is greatly reduced.

Drawings

FIG. 1 is a schematic overall cross-sectional structure provided by the present invention;

FIG. 2 is a schematic structural diagram of a rubber head magazine assembly according to the present invention;

FIG. 3 is a schematic view of a structure of a print head assembly and a rubber head magazine assembly according to the present invention;

FIG. 4 is a schematic structural view of a clamping mechanism and a fastening mechanism provided by the present invention;

FIG. 5 is a schematic view of a locking assembly according to the present invention;

FIG. 6 is a second schematic view of the locking assembly according to the present invention;

FIG. 7 is a schematic structural view of a positioning mechanism provided in the present invention;

fig. 8 is a schematic view of the overall structure provided by the present invention.

Reference numbers in the figures: 1. a processing table; 2. mounting grooves; 3. a rubber head magazine assembly; 31. stock disk; 32. a receiving groove; 33. a rubber head body; 34. a stepped groove; 35. a magnetic ball block; 36. an end plate; 37. a magnetic ball groove; 4. a motor; 5. a positioning mechanism; 51. a telescopic groove; 52. a telescopic block; 53. a through hole; 54. a positioning column; 55. positioning a groove; 56. a return spring; 57. a microswitch; 58. a motor; 59. an elliptical disk; 6. a controller; 7. a printhead assembly; 71. a base frame; 72. a clamping mechanism; 721. accommodating grooves; 722. a first electromagnet; 723. penetrating a groove; 724. a ring plate; 725. a conductive hole; 726. a steel wire; 727. a guide wheel; 728. an avoidance groove; 729. a clamping block; 720. a tension spring; 73. connecting grooves; 74. connecting columns; 75. a fastening mechanism; 751. a guide groove; 752. pressing the column; 753. rotating the groove; 754. a locking plate; 8. a locking assembly; 81. a top plate; 82. a second electromagnet; 83. a sloping block; 84. a locking block; 85. a lock hole; 86. a chute; 87. a chute; 88. a limiting groove; 89. a compression spring; 80. and a limiting block.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Please refer to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8 in combination, wherein fig. 1 is a schematic overall cross-sectional structure diagram provided by the present invention; FIG. 2 is a schematic structural diagram of a rubber head magazine assembly according to the present invention; FIG. 3 is a schematic view of a structure of a print head assembly and a rubber head magazine assembly according to the present invention; FIG. 4 is a schematic structural view of a clamping mechanism and a fastening mechanism provided by the present invention; FIG. 5 is a schematic view of a locking assembly according to the present invention; FIG. 6 is a second schematic view of the locking assembly according to the present invention; FIG. 7 is a schematic structural view of a positioning mechanism provided in the present invention; fig. 8 is a schematic view of the overall structure provided by the present invention. The automatic mechanism of changing of bat printing machine offset head includes: a processing table 1, a mounting groove 2 and a motor 4.

In a specific implementation process, as shown in fig. 1, fig. 2 and fig. 8, a mounting groove 2 is formed in a surface of the processing table 1, a motor 4 is installed inside the processing table 1 and located at a side edge of the mounting groove 2, a disc-shaped rotatable rubber head library component 3 is installed in the mounting groove 2, an output end of the motor 4 is fixedly connected with a rotating shaft of the rubber head library component 3, a positioning mechanism 5 capable of accurately locking an angle of the rubber head library component 3 is installed on a side wall of the mounting groove 2 and located below the motor 4, a controller 6 is installed at a side edge of the positioning mechanism 5, a printing head component 7 is arranged at a top of the rubber head library component 3, a locking component 8 capable of being pushed by an inclined plane is installed at a side edge of the printing head component 7, and the motor 4, the positioning mechanism 5;

the device adopts the storage rubber head body 33 of rubber head storehouse subassembly 3, the convenient location of rotatory storage mechanism of disk, the sunken formula of gluing head storehouse subassembly 3 is installed in mounting groove 2 comparatively saves the occupation of plane space, when needing to change rubber head body 33, controller 6 control motor 4 drive rubber head storehouse subassembly 3 and rotate, hold the groove 32 rotation to the top with the vacancy, then print head subassembly 7 moves and holds the groove 32 top and block into holding the inslot 32 with the rubber head body 33 who uses, then print head subassembly 7 shifts up the migration distance, control motor 4 drive rubber head storehouse subassembly 3 through controller 6 and rotate, make the rubber head body 33 who treats to change rotate to the top, drive print head subassembly 7 and move down and fix with rubber head body 33 joint, realize the release of rubber head body 33 through the cooperation unblock of locking Assembly 8, accomplish the change.

The traditional rubber head replacement adopts manual placement of a screwing screw to detach, replace and fix, the operation is troublesome, the replacement and matching positions have deviation, the positions are frequently required to be corrected again, and the operation is complicated, the rubber head warehouse assembly 3 is adopted to store the rubber heads in a high-precision positioning mode, the rubber head warehouse assembly can be used for conveniently and accurately sliding, meanwhile, one-step clamping operation is realized through the arrangement of the printing head assembly 7, and the concrete operation is as follows:

as shown in fig. 2 and 3, the print head assembly 7 includes a base frame 71, a clamping mechanism 72, a connecting groove 73, a connecting column 74 and a fastening mechanism 75, the clamping mechanism 72 which can be adjusted by telescopic pulling is installed inside the base frame 71, the connecting groove 73 is symmetrically formed in the bottom surface of the base frame 71, the connecting column 74 is inserted into the connecting groove 73 in a matching manner, the clamping mechanism 72 is clamped with the connecting column 74 in a matching manner, the fastening mechanisms 75 are symmetrically installed on two sides of the clamping mechanism 72 inside the clamping mechanism 72, and the fastening mechanism 75 is in transmission connection with the clamping mechanism 72; glue first storehouse subassembly 3 including storehouse dish 31, accomodate groove 32, glue head body 33, ladder groove 34, magnetic ball piece 35, end plate 36 and magnetic ball groove 37, storehouse dish 31 both sides central point puts and 2 inner walls rotation connection of mounting groove, storehouse dish 31 edge equidistance has been seted up a plurality of grooves 32 of accomodating, accomodate groove 32 port and seted up ladder groove 34, accomodate the inside glue head body 33 that is provided with in groove 32, glue head body 33 end fixing has end plate 36, and end plate 36 and ladder groove 34 structure cooperation, end plate 36 bottom surface bilateral symmetry is fixed with magnetic ball piece 35, ladder groove 34 bilateral symmetry is fixed with magnetic ball groove 37, and magnetic ball piece 35 and magnetic ball groove 37 structure cooperation, spliced pole 74 and end plate 36 fixed connection.

The top of every colloid body 33 is the same end plate 36 of fixed knot structure, cooperation through end plate 36 and ladder groove 34 makes colloid body 33 place and accomodate the groove 32 in, counterpoint setting through magnetic ball piece 35 and magnetic ball groove 37 makes things convenient for accurate of end plate 36 to place and temporary locking, bed frame 71 descends and makes spliced pole 74 and spread groove 73 cooperation grafting, it is fixed to block the spliced pole 74 through clamping mechanism 72, cooperation fastening mechanism 75's linkage compresses tightly to realize that print head assembly 7 is fixed with being connected of end plate 36, adopt this mode quick and stable fix colloid body 33, it is more stable and high-efficient to fix placing for traditional manual fixation mode or sucking disc formula are fixed.

Wherein, magnetism ball groove 37 is the complex hemispherical with magnetism ball piece 35, magnetism ball groove 37 all adopts magnet to make with magnetism ball piece 35, and magnetism ball groove 37 is opposite with magnetism ball piece 35, and hemispherical magnetism ball groove 37 and magnetism ball piece 35 butt joint guarantee end plate 36 and ladder groove 34's cooperation position are more accurate, effectively overcome because of the small deviation that mechanical transmission brought.

The automatic clamping action of the clamping mechanism 72 is specifically as follows:

as shown in fig. 4, the clamping mechanism 72 includes a receiving groove 721, a first electromagnet 722, a through groove 723, a ring plate 724, a conducting hole 725, a wire 726, a guide wheel 727, an avoiding groove 728, a clamping block 729 and a telescopic spring 720, the receiving groove 721 is formed in the base frame 71, the first electromagnet 722 is installed in the receiving groove 721, the through groove 723 is formed at the bottom of the receiving groove 721, the ring plate 724 is fixed to the telescopic end of the first electromagnet 722, the ring plate 724 is inserted into the through groove 723, the avoiding groove 728 is formed at the side of the connecting groove 73, the conducting hole 725 is formed between the avoiding groove 728 and the through groove 723, the clamping block 729 is placed in the avoiding groove 728 in a matching manner, the clamping block 729 is elastically connected to the avoiding groove 728 through the telescopic spring 720, the wire 726 is inserted into the conducting hole 725, two ends of the wire 726 are respectively fixedly connected to the clamping block 729, the wire 726 passes through the ring plate 724, a guide wheel 727 is rotatably arranged above the joint of the guide hole 725 and the through groove 723, and the steel wire 726 is in contact with the guide wheel 727.

Before the connecting column 74 is inserted into the connecting groove 73, the controller 6 controls the first electromagnet 722 to drive the ring plate 724 to contract, the ring plate 724 pulls the steel wire 726 to move upwards, the transverse connection distance of the steel wire 726 is reduced, the clamping block 729 overcomes the elastic force of the telescopic spring 720 and retracts into the avoiding groove 728, then the connecting column 74 is inserted into the connecting groove 73, the controller 6 controls the first electromagnet 722 to extend, the clamping block 729 extends out of the avoiding groove 728 and is clamped at the edge of the connecting column 74 through the elastic force of the telescopic spring 720, the splicing and fixing of the connecting column 74 are completed, wherein the installation of the guide wheel 727 ensures that the deformation guide of the steel wire 726 is smoother, the abrasion is reduced, and the elastic clamping installation of the rubber head body 33 can be quickly carried out by adopting the automatic clamping and placing.

The specific steps of the pressing operation of the tightening mechanism 75 are as follows:

as shown in fig. 4, the fastening mechanism 75 includes a guide groove 751, a pressing column 752, a rotating groove 753, and a locking plate 754, the guide groove 751 communicating with the avoiding groove 728 is symmetrically formed on both sides of the receiving groove 721, the pressing column 752 is disposed in the guide groove 751, the pressing column 752 is fixedly connected with the telescopic end of the first electromagnet 722, the rotating groove 753 is formed on the top surface of the holding block 729, the locking plate 754 is rotatably mounted in the rotating groove 753, the bottom end of the pressing column 752 is in press contact with the locking plate 754, and the side edge of the connecting column 74 and the end of the locking plate 754 are in a matched inclined plane shape.

The pressing column 752 is driven to descend in the guide groove 751 in the extending process of the first electromagnet 722, the bottom end of the pressing column 752 is pressed at the end part of the locking plate 754, one end, close to the connecting groove 73, of the locking plate 754 is tilted up through the lever rotation principle, the end part of the locking plate 754 upwards and stably extrudes the connecting column 74, and the connecting column 74 is more stably pressed in the connecting groove 73 because the side edge of the connecting column 74 is matched with the end part of the locking plate 754 in an inclined plane shape, so that fine swinging of connection of the connecting column 74 is avoided, and the clamping stability of the rubber head body 33 is improved.

The rubber head body 33 and the end plate 36 are accurately limited in the accommodating groove 32 through the clamping connection of the magnetic ball block 35 and the magnetic ball groove 37, the rubber head body 33 needs to be locked, and the storage stability of the rubber head body is guaranteed.

As shown in fig. 5 and 6, the locking assembly 8 includes a top plate 81, a second electromagnet 82, a sloping block 83, a locking block 84, a locking hole 85, a sliding groove 86, a sloping groove 87, a limiting groove 88, a compression spring 89 and a limiting block 80, the top plate 81 is fixed on the top of the print head assembly 7, the side edge of the bottom surface of the top plate 81 is provided with a second electromagnet 82, and the telescopic end of the second electromagnet 82 is fixed with an inclined block 83, one side of the accommodating groove 32 close to the second electromagnet 82 is provided with a sliding groove 86, a locking block 84 is inserted in the sliding groove 86, a locking hole 85 is arranged on the surface of the end plate 36, the locking block 84 is matched and clamped with the lock hole 85, the bottom of the sliding groove 86 is provided with a limit groove 88, the bottom of the locking block 84 is fixed with a limit block 80, and the limiting block 80 is elastically connected with a limiting groove 88 through a compression spring 89, the top surface of the locking block 84 is provided with a chute 87, and the chute 87 is structurally matched with the oblique block 83.

When the end plate 36 is inserted into the receiving groove 32, the bottom edge of the end plate 36 will be in pressing contact with the beveled end of the locking block 84, so that the locking block 84 slides outwards along the limiting groove 88 against the elastic force of the compression spring 89 until the end plate 36 descends to the position where the locking hole 85 is aligned with the locking block 84, the locking block 84 is clamped into the locking hole 85 by the elastic force of the compression spring 89 to complete storage locking of the end plate 36 and the rubber head body 33, the locking of the locking block 84 needs to be removed when the rubber head body 33 is replaced, the controller 6 controls the second electromagnet 82 to extend so that the beveled block 83 is inserted into the inclined groove 87, and the locking block 84 slides outwards against the elastic force of the compression spring 89 by the inclined surface pressing to complete unlocking of the end plate 36, and the locking and unlocking of the end plate 36 are convenient and stable.

Because the replacement position of the rubber head needs to be accurately maintained at the topmost end of the rubber head library component 3, the rotation positioning precision of the rubber head library component 3 needs to be guaranteed, the invention adopts the positioning mechanism 5 to assist the rubber head library component 3 to perform high-precision positioning, and the specific operation is as follows:

as shown in fig. 7, the positioning mechanism 5 includes a telescopic slot 51, a telescopic block 52, a through hole 53, a positioning column 54, a positioning slot 55 and a return spring 56, the telescopic slot 51 is provided inside the processing table 1, the through hole 53 communicated with the telescopic slot 51 is provided at the side of the mounting slot 2, the telescopic block 52 is provided in the telescopic slot 51 in a matching manner, the return spring 56 is fixed on the surface of the telescopic block 52, the telescopic block 52 is elastically connected with the telescopic slot 51 through the return spring 56, the positioning column 54 is fixed at the end of the telescopic block 52, the positioning column 54 is slidably inserted into the through hole 53, the positioning slot 55 is provided at the corresponding position of the storage slot 32 at the side of the storage tray 31, and the end of the positioning column 54 is in a spherical shape matched with.

Locating slots 55 corresponding to the positions of the accommodating slots 32 one by one are formed in the side edge of the bin tray 31, the matching positions of the locating columns 54 and the locating slots 55 are of smooth spherical structures, when the motor 4 drives the rubber head bin assembly 3 to rotate and change positions, the locating columns 54 can push the telescopic blocks 52 to overcome the elastic force of the reset springs 56 to contract towards the telescopic slots 51 through the sliding extrusion of the locating slots 55 and the locating columns 54, the locating columns 54 are separated from the clamping connection with the locating slots 55, after the rubber head bin assembly 3 rotates and is adjusted, the telescopic blocks 52 and the locating columns 54 are pushed to extend out to be clamped with the locating slots 55 at the corresponding positions through the elastic force of the reset springs 56 to form accurate locating, the locating error of mechanical transmission is effectively overcome, and the angular locating accuracy of the rubber head bin assembly 3.

Glue first storehouse subassembly 3 and take place to rock in order to ensure changing the in-process of gluing the head, need carry out interim location to gluing first storehouse subassembly 3, concrete operation as follows:

as shown in fig. 7, the positioning mechanism 5 further includes a micro switch 57, a motor 58 and an elliptical disk 59, the micro switch 57 is installed on one side of the telescopic slot 51 close to the installation slot 2, the elliptical disk 59 is installed in the telescopic slot 51 in a rotating manner, the motor 58 is installed at the end of the rotating shaft of the elliptical disk 59 in a connecting manner, and the motor 58 is electrically connected with the micro switch 57.

When fixing a position the first storehouse subassembly 3 of gluing, go into the constant head tank 55 that corresponds the position through reference column 54 card, flexible piece 52 can touch-control micro-gap switch 57, makes motor 58 drive oval dish 59 and rotates, makes oval dish 59 rotate with flexible piece 52 extrusion contact, and guarantee reference column 54 and flexible piece 52 can not contract, realize fixed to the spacing of gluing first storehouse subassembly 3, improve the stability of device work.

The potential control logic of the micro switch 57 and the motor 58 is overlapped with the driving logic of the motor 4, when the motor 4 normally drives the rubber head library component 3 to rotate, the micro switch 57 is touched to not drive the motor 58 to rotate, and the circuit logic of the micro switch 57 for controlling the motor 58 is overlapped only after the positioning angle of the rubber head library component 3 is determined.

The working principle is as follows: when the rubber head 33 needs to be replaced, the controller 6 controls the motor 4 to drive the rubber head library assembly 3 to rotate, the storage groove 32 of the vacant position is rotated to the topmost end, then the printing head assembly 7 is moved to the upper part of the storage groove 32, the used rubber head 33 is clamped into the storage groove 32, the rubber head 33 is placed in the storage groove 32 through the matching of the end plate 36 and the stepped groove 34, the accurate placement and the temporary locking of the end plate 36 are facilitated through the alignment arrangement of the magnetic ball block 35 and the magnetic ball groove 37, the bottom edge of the end plate 36 is in pressing contact with the inclined end of the locking block 84 when the end plate 36 descends, the locking block 84 overcomes the elastic force of the compression spring 89 and slides outwards along the limiting groove 88 until the end plate 36 descends to the locking block 84, the locking block 84 is clamped into the locking hole 85 through the elastic force of the compression spring 89 to complete the storage locking of the end plate 36 and the rubber head 33, and then the controller 6 controls the first electromagnet 722 to drive the ring plate to contract, the ring plate 724 pulls the steel wire 726 to move upwards, the transverse connection distance of the steel wire 726 is reduced, the clamping block 729 overcomes the elasticity of the telescopic spring 720 and retracts into the avoiding groove 728, the clamping separation of the connecting column 74 is realized, and the base frame 71 is driven to move upwards to separate the connecting column 74 from being inserted into the connecting groove 73;

the rubber head warehouse component 3 is driven to rotate by the motor 4, a station needing to be replaced is aligned with the printing head component 7, then the base frame 71 is driven to descend, the connecting column 74 is inserted into the connecting groove 73, the controller 6 controls the first electromagnet 722 to extend, the clamping block 729 extends out of the avoiding groove 728 and is clamped at the edge of the connecting column 74 through the elastic force of the telescopic spring 720, the connecting column 74 is inserted and fixed, then the controller 6 controls the second electromagnet 82 to extend, the inclined block 83 is inserted into the inclined groove 87, the locking block 84 overcomes the elastic force of the compression spring 89 to slide outwards through inclined surface pressing, unlocking of the end plate 36 is completed, and the base frame 71 directly moves upwards to complete rubber head replacement.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An automatic changing mechanism for a pad printing machine offset head comprises: processing platform (1), mounting groove (2) and motor (4), mounting groove (2) have been seted up on processing platform (1) surface, processing platform (1) inside is located mounting groove (2) side and installs motor (4), its characterized in that, install discoid rotatable first storehouse subassembly of gluing (3) in mounting groove (2), and motor (4) output and the axis of rotation fixed connection who glues first storehouse subassembly (3), mounting groove (2) lateral wall is located motor (4) below and installs positioning mechanism (5) that can accurate locking glue first storehouse subassembly (3) angle, controller (6) are installed to positioning mechanism (5) side, it is provided with printing head subassembly (7) to glue first storehouse subassembly (3) top, and printing head subassembly (7) side installs locking subassembly (8) that can promote on inclined plane, motor (4), The positioning mechanism (5), the printing head assembly (7) and the locking assembly (8) are electrically connected with the controller (6);

the printing head assembly (7) comprises a base frame (71), a clamping mechanism (72), connecting grooves (73), connecting columns (74) and a fastening mechanism (75), wherein the clamping mechanism (72) capable of being adjusted in a telescopic pulling mode is mounted inside the base frame (71), the connecting grooves (73) are symmetrically formed in the bottom surface of the base frame (71), the connecting columns (74) are connected in the connecting grooves (73) in a matched and inserted mode, the clamping mechanism (72) is connected with the connecting columns (74) in a matched and clamped mode, the fastening mechanisms (75) are symmetrically mounted on two sides, located on the clamping mechanism (72), of the clamping mechanism (72) inside the clamping mechanism (72), and the fastening mechanisms (75) are in transmission connection;

the rubber head warehouse component (3) comprises a warehouse disc (31), a storage groove (32), a rubber head body (33), a step groove (34), a magnetic ball block (35), an end plate (36) and a magnetic ball groove (37), the center positions of both sides of the storehouse plate (31) are rotationally connected with the inner wall of the mounting groove (2), a plurality of accommodating grooves (32) are arranged at the edge of the storage disc (31) at equal intervals, stepped grooves (34) are arranged at the ports of the accommodating grooves (32), the interior of the accommodating groove (32) is provided with a rubber head body (33), the end part of the rubber head body (33) is fixed with an end plate (36), and the end plate (36) is structurally matched with the stepped groove (34), magnetic ball blocks (35) are symmetrically fixed on two sides of the bottom surface of the end plate (36), magnetic ball grooves (37) are symmetrically fixed on two sides of the stepped groove (34), and the magnetic ball block (35) is structurally matched with the magnetic ball groove (37), and the connecting column (74) is fixedly connected with the end plate (36).

2. The automatic pad printer head replacing mechanism according to claim 1, wherein the magnetic ball groove (37) and the magnetic ball block (35) are in a matched hemispherical shape, the magnetic ball groove (37) and the magnetic ball block (35) are both made of magnets, and the magnetism of the magnetic ball groove (37) is opposite to that of the magnetic ball block (35).

3. The automatic replacement mechanism of the offset head of the pad printing machine according to claim 1, wherein the clamping mechanism (72) comprises a holding groove (721), a first electromagnet (722), a through groove (723), a ring plate (724), a conduction hole (725), a steel wire (726), a guide wheel (727), an avoiding groove (728), a clamping block (729) and a telescopic spring (720), the holding groove (721) is formed in the base frame (71), the first electromagnet (722) is installed in the holding groove (721), the through groove (723) is formed in the bottom of the holding groove (721), the ring plate (724) is fixed at the telescopic end of the first electromagnet (722), the ring plate (724) is inserted into the through groove (723), the avoiding groove (728) is formed in the side edge of the connecting groove (73), the conduction hole (725) is formed between the avoiding groove (728) and the through groove (723), and the clamping block (729) is placed in the avoiding groove (728) in a matching manner, and block (729) are held to the card and are passed through expanding spring (720) and dodge groove (728) elastic connection, it has steel wire (726) to alternate in the biography guide hole (725), and steel wire (726) both ends respectively with block (729) fixed connection is held to the card, steel wire (726) pass crown plate (724), it installs guide pulley (727) to pass guide hole (725) and wear groove (723) handing-over position top rotation, and steel wire (726) and guide pulley (727) laminating contact.

4. The automatic pad printer head replacing mechanism according to claim 3, wherein the fastening mechanism (75) comprises a guide groove (751), a pressing column (752), a rotating groove (753) and a locking plate (754), the guide groove (751) communicated with the avoiding groove (728) is symmetrically formed in two sides of the accommodating groove (721), the pressing column (752) is arranged in the guide groove (751), the pressing column (752) is fixedly connected with the telescopic end of the first electromagnet (722), the rotating groove (753) is formed in the top surface of the clamping block (729), the locking plate (754) is rotatably installed in the rotating groove (753), the bottom end of the pressing column (752) is in pressing contact with the locking plate (754), and the side edge of the connecting column (74) and the end of the locking plate (754) are in a matched inclined plane shape.

5. The automatic replacement mechanism of the offset head of the pad printing machine according to claim 1, wherein the locking assembly (8) comprises a top plate (81), a second electromagnet (82), an inclined block (83), a locking block (84), a locking hole (85), a sliding groove (86), a chute (87), a limiting groove (88), a compression spring (89) and a limiting block (80), the top plate (81) is fixed on the top of the printing head assembly (7), the second electromagnet (82) is installed on the side edge of the bottom surface of the top plate (81), the inclined block (83) is fixed on the telescopic end of the second electromagnet (82), the sliding groove (86) is formed on one side, close to the second electromagnet (82), of the accommodating groove (32), the locking block (84) is inserted in the sliding groove (86), the surface of the end plate (36) is provided with the locking hole (85), the locking block (84) is in matched and clamped connection with the locking hole (85), the limiting groove (88) is formed on, locking piece (84) bottom is fixed with stopper (80), and stopper (80) pass through compression spring (89) and spacing groove (88) elastic connection, chute (87) have been seted up to locking piece (84) top surface, and chute (87) and sloping block (83) structure cooperation.

6. The automatic replacement mechanism of the offset head of the pad printing machine according to claim 1, wherein the positioning mechanism (5) comprises a telescopic groove (51), a telescopic block (52), a through hole (53), a positioning column (54), a positioning groove (55) and a return spring (56), the telescopic groove (51) is formed in the processing table (1), the through hole (53) communicated with the telescopic groove (51) is formed in the side edge of the mounting groove (2), the telescopic block (52) is arranged in the telescopic groove (51) in a matching manner, the return spring (56) is fixed on the surface of the telescopic block (52), the telescopic block (52) is elastically connected with the telescopic groove (51) through the return spring (56), the positioning column (54) is fixed at the end part of the telescopic block (52), the positioning column (54) is in sliding insertion connection with the through hole (53), the positioning groove (55) is formed in the side surface of the storage tray (31) at the position corresponding to the storage groove (32), and the end part of the positioning column (54) is matched with the positioning groove (55) to form a spherical surface shape.

7. The automatic mechanism of changing offset head of pad printing machine according to claim 6, characterized in that said positioning mechanism (5) further comprises a micro switch (57), a motor (58) and an elliptical disk (59), said micro switch (57) is installed on one side of said telescopic slot (51) close to said mounting slot (2), said elliptical disk (59) is installed in said telescopic slot (51) in rotation, said motor (58) is installed on the end of the rotation shaft of said elliptical disk (59), said motor (58) is electrically connected with said micro switch (57).