Printing medium conveying structure based on portal frame

Abstract

The utility model discloses a printing medium conveying structure based on a portal frame. The printing medium conveying structure comprises the portal frame, an installation platform installed on the portal frame, a shear fork device, a driving assembly and a grabbing device. Paired linear guide rails are arranged on the mounting platform, sliding blocks in sliding fit with the linear guide rails are arranged in the linear guide rails, the driving assembly is connected with the sliding blocks through bolts so that the driving assembly can be fixed to the linear guide rails, and a rope connected with the grabbing device is arranged on the driving assembly. The driving assembly is used for driving the grabbing device to move in the height direction. The two sets of shear fork devices are arranged at the two ends of the mounting platform correspondingly, one end of each shear fork device is fixedly connected to the mounting platform or the linear guide rail, the other end of each shear fork device is fixedly connected with the grabbing device, and the shear fork devices control the lifting stability of the printing medium through unfolding or folding; the grabbing device is used for grabbing a printing medium. According to the technical scheme, the printing medium can be effectively prevented from being indented or damaged in the transferring process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a printing medium conveying structure based on portal frame. BACKGROUND

[0002] Large -format printing technology has been widely applied in the field such as advertisement identification, building material decoration, industrial material pretreatment, and printing medium is stacked in one place and is transferred to the printing device by transport device to print, and the present disclosure is a kind of negative pressure transfer mechanism and printing equipment, and its patent application number is CN202521605480.4, and the technical scheme is transferred to the printing medium by the way of swing arm, but this transfer mode is prone to bruise the printing medium, cause the printing medium to appear obvious indentation or breakage, so that the printing medium does not meet the production standard after printing. SUMMARY

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a printing medium conveying structure based on portal frame to avoid indentation or breakage during the transfer of printing medium.

[0004] To achieve the above object, the utility model provides the following technical scheme: a printing medium conveying structure based on portal frame, including portal frame, installation platform installed on portal frame, scissor device, drive assembly, grabbing device;The installation platform is equipped with a pair of linear guides, the linear guide is equipped with a sliding block matched with it, the drive assembly is connected with the sliding block by bolt, so that the drive assembly is fixed on the linear guide, the drive assembly is equipped with a rope connected with the grabbing device, and the drive assembly is used to drive the grabbing device to move in the height direction;The scissor device is provided with two groups and is arranged at the two ends of the installation platform respectively, one end of the scissor device is fixedly connected on the installation platform or linear guide, and the other end is fixedly connected with the grabbing device, and the stability of the scissor device is controlled when lifting the printing medium by unfolding or folding;The grabbing device is used for grabbing printing medium.

[0005] As a further improvement of the utility model, the drive assembly includes a transmission assembly, a rotating shaft mounted on the transmission assembly, and a support seat for supporting the rotation of the rotating shaft, the two ends of the support seat are respectively connected with the sliding blocks on the linear guide by screw thread, the rope drives the rotating shaft to rotate through the transmission assembly to control the movement of the grabbing device in the height direction.

[0006] As a further improvement of the utility model, the rotating shaft is provided with a winding wheel, the diameter of the winding wheel is greater than the diameter of the rotating shaft, and the rope is wound on the winding wheel, and the free end of the rope is fixedly connected with the grabbing device.

[0007] As a further improvement of the utility model, the reel is provided with at least two groups, each group of reel is provided with a rope, and the two reels are coaxially installed on the rotating shaft and are respectively installed at the position close to the scissor device of the rotating shaft.

[0008] As a further improvement of the utility model, the mounting platform is provided with a cover plate above the reel, and the cover plate is provided with a limiting block for limiting the winding height of the rope.

[0009] As a further improvement of the utility model, the cover plate is provided with a limiting plate at the two ends corresponding to the axial direction of the reel respectively, and the limiting plate is used for limiting the axial deviation range of the rope on the reel.

[0010] As a further improvement of the utility model, the transmission assembly comprises a speed reducer and a driving motor for providing power for the speed reducer, the rotating shaft is installed on the speed reducer, and the speed reducer and the driving motor are supported on the mounting platform or the linear guide rail through a support plate, so as to reduce the burden on the rotating shaft.

[0011] As a further improvement of the utility model, the grabbing device comprises a frame and a plurality of negative pressure suction cups arranged on the frame, and the scissor device is fixedly connected to the frame.

[0012] As a further improvement of the utility model, the frame is provided with a lifting ring for fixedly connecting the rope.

[0013] As a further improvement of the utility model, the gantry is provided with a horizontal driving assembly, and the mounting platform is connected with the horizontal driving assembly and controlled to move in the horizontal direction through the horizontal driving assembly.

[0014] The utility model has the advantages that the printing medium can be effectively prevented from being pressed or damaged during the transfer process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a whole structure schematic view of the utility model embodiment;

[0016] Fig. 2 It is a driving assembly installation schematic view of the utility model embodiment;

[0017] Fig. 3 It is a reel installation schematic view of the utility model embodiment.

[0018] Fig. 1, mounting platform; 11, linear guide rail; 2, scissor device; 3, driving assembly; 31, transmission assembly; 32, rotating shaft; 33, reel; 34, speed reducer; 35, driving motor; 36, support plate; 4, grabbing device; 41, frame; 42, negative pressure suction cup; 43, lifting ring; 5, rope; 6, cover plate; 7, limiting block; 8, limiting plate; 9, gantry. DETAILED DESCRIPTION

[0019] The utility model will be made further detailed below with the embodiments shown in the drawings.

[0020] Referring to Figs. 1-3 As shown in the figure, a printing medium conveying structure based on a gantry, comprising a gantry 9, a mounting platform 1 mounted on the gantry 9, a scissor device 2, a driving assembly 3, and a grabbing device 4; the mounting platform 1 is provided with a pair of linear guides 11, the linear guides 11 are provided with sliding blocks that are in sliding fit with them, the driving assembly 3 is connected with the sliding blocks through bolts, so that the driving assembly 3 is fixed on the linear guides 11, the driving assembly 3 is provided with a rope 5 that is connected with the grabbing device 4, and the driving assembly 3 is used to drive the grabbing device 4 to move in the height direction; the scissor device 2 is provided with two groups and is arranged at the two ends of the mounting platform 1 respectively, one end of the scissor device 2 is fixedly connected to the mounting platform 1 or the linear guides 11, and the other end is fixedly connected with the grabbing device 4, and the scissor device 2 controls the stability when the printing medium is lifted by unfolding or folding; the grabbing device 4 is used to grab the printing medium.

[0021] In this embodiment, the two groups of scissor devices 2 are fixedly connected to the linear guides 11 through the sliding blocks and the bolts and correspond to the two ends of the grabbing device 4, and this arrangement makes the grabbing device 4 stable during lifting, the driving assembly 3 is used to control the winding and unwinding of the rope 5, one end of the rope 5 is wound and connected with the driving assembly 3, and the other end is fixed with the grabbing device 4; the pair of linear guides 11 facilitates the installation and debugging of the driving assembly 3 in the early stage, the bolts are not locked with the sliding blocks during installation, so that the driving assembly 3 can move on the linear guides 11, and after the installation and debugging are completed, the bolts are locked for fixation, when the printing medium needs to be lifted, the driving assembly 3 works to realize the winding or releasing of the rope 5, the rope 5 pulls the grabbing device 4 to rise or fall, and at the same time, the scissor device 2 unfolds or folds synchronously with the movement of the grabbing device 4; the two groups of scissor devices 2 are synchronously stressed from both sides, can effectively offset the tilting force generated by the weight of the grabbing device 4 and the printing medium, and ensure that the printing medium is in a horizontal state, the driving assembly 3 drives the grabbing device 4 in a precise control of the lifting height through the driving mode of the rope 5, meets the transfer requirements of different heights, and when the grabbing device 4 is lowered to grab the printing medium through the driving mode of the rope 5, the printing medium will only be subjected to the pressure of the self-weight of the grabbing device 4, even if the driving assembly 3 over-reels, it will not generate additional impact force on the printing medium, compared with the transfer mode of the swing arm in the background art, it can avoid the impact force brought by mechanical operation, thereby avoiding damage to the printing medium.

[0022] In an alternative, the driving assembly 3 comprises a transmission assembly 31, a rotating shaft 32 mounted on the transmission assembly 31, and a support seat for supporting the rotation of the rotating shaft 32, the two ends of the support seat are respectively threadedly connected with the sliders on the linear guide rails 11, and the rope 5 is driven by the transmission assembly 31 to rotate the rotating shaft 32 to control the movement of the grabbing device 4 in the height direction.

[0023] In the embodiment, two support seats are provided, the two ends of the rotating shaft 32 are respectively arranged in the two support seats, and the rotating shaft 32 is connected with the support seats through bearings. When the transmission assembly 31 works, the rotating shaft 32 rotates to realize the winding or releasing of the rope 5, thereby controlling the lifting of the grabbing device 4. The provision of the support seats can position the rotating shaft 32 at both ends, avoid the bending deformation of the rotating shaft 32 due to its own weight or the tension of the rope 5, improve the smoothness of the rotation of the rotating shaft 32, and reduce the shaking during lifting.

[0024] Further optimization can be achieved by the following specific mode: a winding wheel 33 is arranged on the rotating shaft 32, the diameter of the winding wheel 33 is greater than that of the rotating shaft 32, the rope 5 is wound on the winding wheel 33, and the free end of the rope 5 is fixedly connected with the grabbing device 4.

[0025] In the embodiment, the winding wheel 33 is connected with the rotating shaft 32 by a key to ensure that the winding wheel 33 rotates synchronously with the rotating shaft 32. When the rotating shaft 32 drives the winding wheel 33 to rotate, the winding wheel 33 guides the rope 5 to be wound or released. Compared with the rope 5 being directly wound on the rotating shaft 32, the diameter of the winding wheel 33 can increase the length of one winding of the rope 5, thereby improving the efficiency of lifting the printing medium.

[0026] In order to balance the force on both sides of the grabbing device 4 and avoid tilting during lifting due to excessive tension of the rope 5 on one side, in some options, the winding wheel 33 can be optimized. The winding wheel 33 is provided with at least two groups, each group of winding wheel 33 is provided with a rope 5, and the two winding wheels 33 are coaxially mounted on the rotating shaft 32 and are respectively arranged at positions close to the scissors devices 2.

[0027] The two winding wheels 33 are mounted on the rotating shaft 32 and are respectively arranged at positions close to the two groups of scissors devices 2. When the rotating shaft 32 rotates, the two winding wheels 33 synchronously wind or release the rope 5, so that the force on both sides of the grabbing device 4 is balanced, the tilting of the grabbing device 4 or the deviation of the printing medium caused by excessive unilateral tension is avoided, and the stability of the lifting process is further improved.

[0028] In some options, a cover plate 6 is arranged above the winding wheel 33 of the mounting platform 1, and a limiting block 7 for limiting the winding height of the rope 5 is arranged on the cover plate 6.

[0029] The lower surface of the cover plate 6 is spaced apart from the upper surface of the winding wheel 33, and the limiting block 7 arranged on the cover plate 6 can be fixed through a clamping groove or a connecting piece. When the rope 5 is wound on the winding wheel 33, the height of the rope 5 gradually rises with the increase of the winding turns. When the height of the rope 5 approaches the lower surface of the limiting block 7, the limiting block 7 will block the rope 5 from rising continuously, so as to prevent the rope 5 from being wound too high and exceeding the range of the winding wheel 33, and to prevent the rope 5 from being pressed, knotted or separated from the winding wheel 33, so as to ensure the order of the winding and unwinding of the rope 5, reduce the wear of the rope 5 and prolong the service life.

[0030] In order to further limit the axial deviation of the rope 5 on the winding wheel 33 and prevent the rope 5 from sliding from the axial ends of the winding wheel 33, on the basis of the above-mentioned cover plate 6, the following optimization can be made. The cover plate 6 is provided with a limiting plate 8 corresponding to the axial ends of the winding wheel 33, and the limiting plate 8 is used to limit the axial deviation range of the rope 5 on the winding wheel 33,

[0031] The limiting plate 8 is a rectangular plate perpendicular to the cover plate 6, and is integrally formed with the cover plate 6 or fixed on the cover plate 6 by welding. The two limiting plates 8 are respectively located at the axial ends of the winding wheel 33. The limiting plate 8 is arranged to prevent the rope 5 from sliding from the axial ends of the winding wheel 33 and causing the grabbing device 4 to be unbalanced, so as to ensure the normal operation of the lifting mechanism.

[0032] In order to improve the power output stability of the transmission assembly 31 and reduce the load of the rotating shaft 32, on the basis of the above-mentioned lifting mechanism of the driving assembly 3 or the winding wheel 33, the structure of the transmission assembly 31 can be optimized. The transmission assembly 31 includes a speed reducer 34 and a driving motor 35 for providing power for the speed reducer 34. The rotating shaft 32 is installed on the speed reducer 34. The speed reducer 34 and the driving motor 35 are supported on the mounting platform 1 or the linear guide rail 11 through a support plate 36, so as to reduce the load on the rotating shaft 32.

[0033] The support plate 36 stably supports the speed reducer 34 and the driving motor 35, so that the weight of the speed reducer 34 and the driving motor 35 is borne by the support plate 36 instead of being transmitted to the mounting platform 1 through the rotating shaft 32, thereby reducing the load of the rotating shaft 32, avoiding deformation of the rotating shaft 32 caused by long-term bearing of additional weight, and ensuring the transmission accuracy and service life of the rotating shaft 32.

[0034] In some options, the grabbing device 4 includes a frame 41 and a plurality of negative pressure suction cups 42 arranged on the frame 41. The scissor device 2 is fixedly connected to the frame 41.

[0035] The frame 41 is made of aluminum alloy material, has the characteristics of light weight and high strength, the scissor device 2 is fixed on the frame 41 through bolts, and the position of the scissor device 2 on the mounting platform 1 corresponds, a plurality of negative pressure suction cups 42 are uniformly arranged on the lower surface of the frame 41, the top of each negative pressure suction cup 42 is connected with the air pipe through the air pipe joint, and the printing medium is grabbed and adsorbed through the negative pressure suction cup 42.

[0036] In some choices, the frame 41 is provided with a lifting ring 43 for connecting with the rope 5, the lifting ring 43 is detachably installed on the frame 41, and the lifting ring 43 is arranged to facilitate cooperation with the position of the rope 5.

[0037] In some choices, the gantry 9 is provided with a horizontal driving assembly 3, the mounting platform 1 is connected with the horizontal driving assembly 3 and moves in the horizontal direction through the horizontal driving assembly 3, and in actual application, the horizontal driving assembly 3 can adopt a linear guide rail, a sliding block matched with the linear guide rail, and a synchronous belt transmission mechanism for driving the sliding block to move, the mounting platform 1 is fixedly connected with the sliding block, so that the movement of the printing medium in the horizontal direction is realized.

[0038] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme belonging to the idea of the present application belongs to the protection scope of the present application. It should be pointed out that for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application can also be considered as the protection scope of the present application.

Claims

1. A gantry-based print media transport structure, characterized by, The gantry-based printing medium conveying structure comprises a gantry, a mounting platform mounted on the gantry, a scissor device, a driving assembly, and a grabbing device. The scissor device is provided with two groups and is arranged at two ends of the mounting platform respectively. The grabbing device is used for grabbing the printing medium.

2. The gantry-based print media transport structure of claim 1, wherein, The driving assembly comprises a transmission assembly, a rotating shaft mounted on the transmission assembly, and a support seat for supporting the rotating shaft to rotate.

3. The gantry-based print media transport structure of claim 2, wherein, The support seat is threadedly connected to the sliding blocks on the linear guide rails at two ends respectively.

4. The gantry-based print media transport structure of claim 3, wherein, The rope is wound on the winding wheel, and the free end of the rope is fixedly connected to the grabbing device.

5. The gantry-based print media transport structure of claim 3 or 4, wherein, The winding wheel is coaxially mounted on the rotating shaft and is arranged near the scissor device.

6. The gantry-based print media transport structure of claim 5, wherein, The mounting platform is provided with a cover plate above the winding wheel. The cover plate is provided with a limiting block for limiting the winding height of the rope. The cover plate is provided with a limiting plate at two ends corresponding to the axial direction of the winding wheel.

9. The gantry-based print media transport structure of claim 2, wherein, 7. The gantry-based printing medium conveying structure according to claim 1, wherein the grabbing device comprises a frame and a plurality of negative pressure suction cups arranged on the frame, and the scissor device is fixedly connected to the frame.

10. The gantry-based print media transport structure of claim 1, wherein, 8. The gantry-based printing medium conveying structure according to claim 7, wherein the frame is provided with a lifting ring for fixedly connecting the rope. The transmission assembly comprises a speed reducer and a driving motor for providing power for the speed reducer. The rotating shaft is mounted on the speed reducer. The speed reducer and the driving motor are supported on the mounting platform or the linear guide rail through a support plate to reduce the burden on the rotating shaft. The gantry is provided with a horizontal driving assembly. The mounting platform is connected to the horizontal driving assembly and moves in the horizontal direction through the horizontal driving assembly.

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