Automatic picture tightening machine

Abstract

The automatic picture stretching machine comprises a feeding device, a first cloth stretching and nailing device, a second cloth stretching and nailing device and a material moving device, and the feeding device comprises a material containing table, a drawing paper feeding device and a picture frame feeding device; the first cloth stretching and nailing device and the second cloth stretching and nailing device are distributed in an L shape, a connecting platform is arranged between the first cloth stretching and nailing device and the second cloth stretching and nailing device, the material moving device comprises two clamping and material moving mechanisms, each clamping and material moving mechanism comprises a support, two clamping assemblies and a sliding assembly, and a sliding groove is formed in a material placing table. The connecting platform is provided with a T-shaped groove, the T-shaped groove comprises a first sliding groove and a second sliding groove, the first cloth stretching and nailing device comprises a first rack, the first rack comprises a first supporting guide rail, the first supporting guide rail, the material placing platform and the connecting platform are arranged at the same height, the second cloth stretching and nailing device comprises a second rack, and the second rack comprises a second supporting guide rail. The second supporting guide rail and the connecting platform are arranged at the same height.

Description

Technical Field

[0001] The present invention relates to the technical field of frameless painting processing, and particularly to an automatic painting stretching machine. Background Art

[0002] A frameless painting, as the name implies, is a painting without an outer frame and is a trend in modern decoration. Since the cost of the outer frame is reduced, it is more economical, has a more original flavor, and is more in line with the aesthetic concepts of modern people.

[0003] There is also a semi-automatic frameless painting processing device available. It can tighten the canvas, and some processes are realized by machine processing. Compared with manual operation, it effectively avoids the phenomenon of uneven canvas, and the work efficiency has been improved to a certain extent. However, as the market demand for frameless paintings is increasing, the existing semi-automatic equipment can no longer meet the market needs. Its feeding still adopts manual feeding. The picture frame is placed on the back of the canvas or drawing paper, and then the picture frame and the canvas are sent into the semi-automatic equipment. There are problems such as low efficiency, poor accuracy, and inconsistent finished product quality. Moreover, each time only two opposite sides of the picture frame can be nailed with the canvas. When nailing the canvas on the other two sides of the picture frame, it is necessary to manually turn the picture frame, and at the same time fold the canvas at the other side to be nailed to ensure that the canvas edge is completely hidden behind the picture frame, and then the canvas and the picture frame are put into the nailing equipment again for nailing. Such equipment cannot process finished products at one time, has a low degree of automation, complex operation, and high production costs. Summary of the Invention

[0004] Based on the above problems, the object of the present invention is to provide an automatic painting stretching machine.

[0005] In view of the above problems, the following technical solutions are provided: An automatic picture stretching machine, comprising a feeding device, a first picture stretching and nailing device, a second picture stretching and nailing device, and a material moving device for driving the picture frame and the picture paper to move. The feeding device comprises a material placing table, a picture paper feeding device, and a picture frame feeding device. The picture paper feeding device comprises a first machine table for placing stacked picture papers and a first feeding mechanism for feeding the picture papers into the material placing table. The picture frame feeding device comprises a second machine table for placing picture frames. The second machine table is provided with a stacking station and a waiting station. The waiting station is arranged at one end close to the material placing table. A moving and picking mechanism for moving the picture frames is arranged between the waiting station and the feeding station. The first picture stretching and nailing device and the second picture stretching and nailing device are distributed in an L shape. A connecting platform is arranged between the first picture stretching and nailing device and the second picture stretching and nailing device. The material moving device comprises two sets of clamping and material moving mechanisms respectively arranged in the first picture stretching and nailing device and the second picture stretching and nailing device. The clamping and material moving mechanism comprises a bracket, two sets of clamping components respectively arranged at both ends of the bracket, and a sliding component for driving the bracket to move. A sliding groove for the bracket to slide is arranged on the material placing table. The connecting platform is provided with a T-shaped groove for the two sets of clamping and material moving mechanisms to slide. The T-shaped groove comprises a first sliding groove corresponding to the feeding direction of the first picture stretching and nailing device and a second sliding groove corresponding to the feeding direction of the second picture stretching and nailing device. The first picture stretching and nailing device comprises a first machine frame. The first machine frame comprises a first supporting guide rail for placing the picture frame and the picture paper. The first supporting guide rail is arranged at the same height as the material placing table and the connecting platform. The first supporting guide rail is respectively arranged on both sides of the clamping and material moving mechanism. The second picture stretching and nailing device comprises a second machine frame. The second machine frame comprises a second supporting guide rail for placing the picture frame and the picture paper. The second supporting guide rail is arranged at the same height as the connecting platform. The second supporting guide rail is respectively arranged on both sides of the clamping and material moving mechanism.

[0006] By adopting the above technical solution, the drawing paper (which can also be a canvas, and its material is not limited. For the convenience of description, it is collectively referred to as drawing paper hereinafter. Canvas stretching and nailing refers to the action of stretching and nailing both sides of the drawing paper, rather than limiting the material of the drawing paper) and the picture frame are automatically fed to the feeding station of the placing table through the drawing paper feeding device and the picture frame feeding device. The position of the picture frame on the drawing paper is more accurate, and the forming quality of the frameless picture is higher and more standardized; automatic feeding, compared with the existing equipment that requires manual feeding or manual turning, this technical solution has a high degree of automation, greatly improves the production efficiency, reduces manual operation, has high stability, and reduces labor costs; this technical solution adopts two groups of support guide rails and two groups of clamping and transferring mechanisms. When the clamping component at the front end clamps the picture frame and the drawing paper at the feeding station, the clamping component at the rear end clamps the semi-finished product after the stretching and nailing of both sides of the canvas. The sliding component drives the two clamping components to move backward through the bracket, and the clamping component drives the picture frame, the drawing paper, and the semi-finished product to slide along the support guide rail into the first canvas stretching and nailing device and the connecting platform respectively. The picture frame and the drawing paper are subjected to stretching and nailing of both sides of the canvas. One end of the clamping and transferring mechanism in the direction of the second canvas stretching and nailing device moves into the second chute, and the clamping component at the front end clamps the semi-finished product. Then, the two clamping components of the clamping and transferring mechanism in the direction of the first canvas stretching and nailing device are released, and the clamping component at the front end in the direction of the second canvas stretching and nailing device moves the semi-finished product into the second canvas stretching and nailing device for stretching and nailing of the other two sides of the canvas (at the same time, the clamping component at the rear end in the direction of the second canvas stretching and nailing device moves the finished product after the stretching and nailing of the four sides of the canvas from the second canvas stretching and nailing device to the discharging station). When the clamping component in the direction of the second canvas stretching and nailing device transfers the material, the clamping component in the direction of the first canvas stretching and nailing device retreats to the previous station and repeats the work of the previous step. Compared with the existing picture stretching machine that mostly adopts platform type material transfer, the stretching and nailing of its canvas requires the cooperation of the platform and the canvas stretching and nailing device. After completing the process of this station, the platform moves it to the next station for the next process, and it can continue to work only after the platform resets. In this technical solution, the material transfer and the canvas stretching and nailing do not interfere with each other, that is, the two can work simultaneously, greatly improving the work efficiency.

[0007] The invention is further provided that: the clamping component includes a bottom clamping plate connected to the first cylinder and a top clamping plate connected to the second cylinder. The first cylinder and the second cylinder are distributed along the sliding direction of the bracket. The top clamping plate is an extension plate extending towards the first cylinder. The top clamping plate and the bottom clamping plate are arranged up and down. The horizontal height of the bottom clamping plate is lower than the tabletop of the placing table, and the horizontal height of the top clamping plate is higher than the horizontal height of the picture frame when it is on the placing table.

[0008] By adopting the above technical solution, the bottom clamping plate and the top clamping plate are respectively inserted into the upper and lower sides of the picture frame and the drawing paper, and then clamped up and down. Double clamping is adopted by two cylinders to increase the clamping strength, avoid the deviation of the drawing paper and the picture frame during the movement, ensure the accuracy of its material transfer, and has a simple structure and high stability.

[0009] The invention is further provided that: the first feeding mechanism includes a feeding guide rail for limiting and moving the drawing paper disposed between the first machine table and the material placing table. The material placing table includes a feeding station and a feeding belt for moving the drawing paper on the first machine table along the feeding guide rail to the feeding station. The feeding belt is arranged parallel to the feeding guide rail and below the feeding guide rail. An absorbing mechanism for sucking the drawing paper and feeding one end of the drawing paper into the feeding guide rail is arranged on the first machine table. An active tensioning wheel for pressing the drawing paper to make it close to the feeding belt is arranged between the first machine table and the feeding belt. The active tensioning wheel is controlled to lift and lower by a pneumatic mechanism.

[0010] By adopting the above technical solution, the feeding guide rail is set to limit the movement and feeding of the drawing paper, strengthening the accuracy when it enters the feeding station. The cooperation of the feeding belt and the active tensioning wheel strengthens the stability of the movement and feeding process, ensuring that the drawing paper is in a flat state. The absorbing mechanism includes a moving component and an absorbing component. The moving component drives the absorbing component to move down to suck the drawing paper, then move up to a specified height and then move forward to feed one end of the drawing paper into the feeding guide rail. The whole process is automatic drawing paper feeding, without manual feeding, with high efficiency, high stability and high precision.

[0011] The invention is further provided that: a limiting component for limiting and stacking the picture frames and a sliding conveying mechanism for conveying the picture frames to the waiting station are arranged between the stacking station and the waiting station. A feeding port for a single picture frame to pass through is arranged between the lower end of the limiting component and the sliding conveying mechanism.

[0012] By adopting the above technical solution, the sliding conveying mechanism moves the picture frame at the bottom of the stacking station out through the feeding port and moves it to the waiting station. The picture frame at the waiting station is moved to the feeding station by the moving and picking mechanism. A plurality of picture frames are stacked on the stacking station. When the picture frame at the bottom is removed, the picture frames above fall to the position corresponding to the feeding port.

[0013] The invention is further provided that: a first sliding frame is arranged below the first support guide rail. First sliding bases are respectively arranged on both sides of the first sliding frame. The sliding direction of the first sliding bases is perpendicular to the feeding direction of the first fabric stretching and nailing device. The first support guide rail is arranged on the first sliding bases. An installation strip is arranged on the first sliding bases. The first support guide rail is detachably connected to the inner side of the installation strip through a connecting rod. A first edge folding component for driving the drawing paper to bend outward of the picture frame is arranged on the outer side of the installation strip. The first edge folding component includes a first edge folding plate and a driving air cylinder for driving the first edge folding plate to move up and down. The first sliding bases are electrically connected to the control mechanism. The control mechanism adjusts the distance between the two first support guide rails by controlling the first sliding bases to slide along the first sliding frame.

[0014] By adopting the above technical solution, the driving cylinders on both sides drive the first flanging plates to move upward along both sides of the picture frame, causing the drawing paper to bend. A first sliding frame is provided, and the control mechanism can adjust the distance between the first support rails on both sides and the distance between the first flanging plates on both sides by controlling the first sliding base to slide along the first sliding frame. It can be applied to picture frames of different sizes, greatly improving the applicability of the equipment. Compared with manual adjustment and numerical control adjustment, it has high precision, simple operation, convenient use, and high efficiency.

[0015] The invention is further provided that: the first stretching and nailing device further includes a stretching mechanism and a nailing mechanism arranged on both sides of the first support rail. The stretching mechanism includes a mounting bracket and a clamping assembly arranged on the mounting bracket. Mechanical slide rails are respectively arranged at the front and rear ends above the first machine frame, and the sliding direction of the mechanical slide rails is perpendicular to the feeding direction of the first stretching and nailing device. The mechanical slide rails include a mounting seat, and the front and rear ends of the mounting bracket are respectively arranged on the mounting seat. The mounting seat slides along the mechanical slide rails to drive the clamping assemblies on both sides to slide left and right respectively. The clamping assembly includes a fixed clamping plate fixedly installed on the outside of the mounting bracket, a movable clamping plate hinged to the fixed clamping plate, and a driving cylinder for driving the movable clamping plate. The movable clamping plate includes a first hinged part for hinged connection with the fixed clamping plate and a movable clamping part for clamping the drawing paper. The first hinged part and the movable clamping part are arranged in a "7" shape, and a second hinged part hinged to the driving cylinder is further arranged between the first hinged part and the movable clamping part.

[0016] By adopting the above technical solution, the clamping assemblies on both sides respectively grasp the two sides of the drawing paper folded along both sides of the picture frame and move inward relative to each other through the mechanical slide rails, making the drawing paper in a taut state waiting for nailing. The movable clamping plate is arranged in a "7" shape to enhance the stability and strength of its clamping. The driving cylinder drives the movable clamping plate to rotate hingedly, with simple operation and high stability.

[0017] The invention is further provided that: the nailing mechanism includes a nailing assembly, a mounting machine frame, and a servo motor. The two ends of the mounting machine frame are respectively connected to the mounting seat and are arranged parallel to the mounting bracket. The nailing assembly is slidably arranged on the mounting machine frame, and the servo motor drives the nailing assembly to slide along the mounting machine frame and get close to the clamping assembly to nail the folded drawing paper and the picture frame.

[0018] By adopting the above technical solution, the servo motor drives the nailing assembly to slide along the mounting machine frame and get close to the clamping assembly to nail the folded drawing paper and the picture frame at multiple points. The nailing is automated, the nailing intervals are uniform, precise and beautiful. The mounting machine frame is arranged on the mounting seat, and the stretching mechanism is also arranged on the mounting seat. The stretching mechanism slides along the mechanical slide rails to drive the nailing mechanism to move, ensuring that the nailing mechanism gets close to the clamping assembly for nailing and avoiding nailing deviation.

[0019] The invention is further provided that: a second sliding frame is arranged below the second support guide rail. The second sliding frame includes an X-axis sliding track and a Y-axis sliding track. The sliding direction of the X-axis sliding track is arranged parallel to the feeding direction of the second fabric stretching and nailing device. The sliding direction of the Y-axis sliding track is arranged perpendicular to the feeding direction of the second fabric stretching and nailing device. The X-axis sliding track is arranged on the mounting frame, and the mounting frame is arranged on the Y-axis sliding track. The X-axis sliding track and the Y-axis sliding track are respectively electrically connected to the control mechanism. The second support guide rail is detachably connected to the mounting frame through a connecting piece. A second edge folding assembly for driving the drawing paper to bend outward from the picture frame is further arranged on the mounting frame. The second edge folding assembly includes a second edge folding plate and a driving cylinder for driving the second edge folding plate to move up and down.

[0020] By adopting the above technical solution, when the semi-finished picture frame enters the second fabric stretching and nailing device, the driving cylinders on both sides drive the second edge folding plates to move upward along both sides of the picture frame, so that the drawing paper is bent. The second sliding frame is arranged, and the control mechanism can adjust the distance between the two second support guide rails and the distance between the two second edge folding plates on both sides by controlling the mounting frame to slide along the Y-axis sliding track, which can be applied to picture frames of different sizes, greatly improving the applicability of the equipment. Compared with manual adjustment and numerical control adjustment, it has high precision, simple operation, convenient use and high efficiency.

[0021] The invention is further provided that: a corner folding device is further arranged on the second frame. The corner folding device includes four groups of corner folding mechanisms respectively arranged in the four diagonal directions of the picture frame. The corner folding mechanism includes a corner folding plate. The corner folding plate is arranged on the second sliding base inside the second edge folding plate. The corner folding plate includes an inserting corner part arranged in a right triangle shape. The second sliding base is slidably arranged on the X-axis sliding track. The corner folding plates on the same side are arranged oppositely and relatively move through the X-axis sliding track on the same side.

[0022] By adopting the above technical solution, after the driving cylinders on both sides drive the second edge folding plates to move upward along both sides of the picture frame, the control mechanism controls the corner folding plates on the same side (i.e., controls the second sliding base to move through a servo motor or a cylinder) to relatively move along the X-axis sliding track on one side, inserts the redundant drawing paper turned out on both sides into the direction of the picture frame, respectively forming a corner fold. The four corners are simultaneously inserted to form a corner fold. The distance of the insertion of the corner folding plate is controlled by the servo motor, accurately controlling the angle and the folding depth of the corner fold, thereby improving the finished product quality of the frameless picture.

[0023] The invention is further provided that: the folding device further includes a lateral positioning mechanism, the lateral positioning mechanism includes lateral positioning components respectively arranged on both sides of the second support guide rail, the lateral positioning component includes a positioning block and a lateral positioning cylinder for driving the positioning block to clamp or move away from the picture frame, and the horizontal height of the positioning block is higher than that of the second support guide rail; the folding device further includes a longitudinal positioning mechanism, the longitudinal positioning mechanism includes four groups of longitudinal positioning components, the longitudinal positioning component includes a positioning rod and a longitudinal positioning cylinder for driving the positioning rod, the positioning rod is arranged parallel to the second support guide rail, and the longitudinal positioning component is arranged inside the folding plate and is detachably connected to the folding plate.

[0024] By adopting the above technical solutions, the positions of the picture frame and the picture paper are adjusted and positioned respectively by the lateral positioning mechanism and the longitudinal positioning components, avoiding slight deviations during the moving process, facilitating the subsequent operations of the folding device and the second cloth stretching and nailing device, making the operations of folding the corners, stretching the cloth, and nailing more accurate, and the quality of the finished product higher. Description of the Drawings

[0025] Figure 1 It is a perspective view of the present invention.

[0026] Figure 2 It is a perspective view of the picture paper feeding device of the present invention.

[0027] Figure 3 It is a perspective view of the picture frame feeding device of the present invention.

[0028] Figure 4 It is a top view of the partial structure of the present invention.

[0029] Figure 5 It is a perspective view of the clamping and transferring mechanism of the present invention.

[0030] Figure 6 It is a partial structure perspective view of the first cloth stretching and nailing device of the present invention Figure 1 .

[0031] Figure 7 It is a perspective view of the first sliding frame of the present invention.

[0032] Figure 8 It is a partial structure perspective view of the first cloth stretching and nailing device of the present invention Figure 2 .

[0033] Figure 9 It is a partial structure perspective view of the cloth stretching mechanism of the present invention.

[0034] Figure 10 It is a partial structure side view of the cloth stretching mechanism of the present invention.

[0035] Figure 11Is the three-dimensional view of the partial structure of the second fabric nailing device of the present invention Figure 1 。

[0036] Figure 12 Is the three-dimensional view of the partial structure of the second fabric nailing device of the present invention Figure 2 。

[0037] Figure 13 Is the top view of the partial structure of the second fabric nailing device of the present invention.

[0038] Figure 14 Is the three-dimensional view of the partial structure of the second fabric nailing device of the present invention Figure 3 。

[0039] Figure 15 Is the enlarged view of the partial structure of the second fabric nailing device of the present invention.

[0040] Figure 16 Is the schematic diagram of the folding process of the picture frame and the picture paper.

[0041] Meanings of the reference numerals in the figures: 1. Material placing table, 11. Sliding groove, 12. Loading station, 13. Feeding belt, 2. Drawing paper loading device, 21. First machine platform, 22. First loading mechanism, 221. Feeding guide rail, 222. Material suction mechanism, 223. Movable tensioning pulley, 224. Pneumatic mechanism, 3. Picture frame loading device, 31. Second machine platform, 311. Stacking station, 312. Waiting station, 32. Moving material taking mechanism, 33. Limit component, 331. Feeding port, 34. Sliding conveying mechanism, 4. First fabric stretching and nailing device, 41. First machine frame, 42. First support guide rail, 43. First sliding frame, 44. First sliding base, 45. Installation strip, 46. First hemming component, 461. First hemming plate, 47. Fabric stretching mechanism, 471. Installation bracket, 472. Clamping component, 4721. Fixed clamping plate, 4722. Movable clamping plate, 47221. First hinge part, 47222. Movable clamping part, 47223. Second hinge part, 473. Mechanical slide rail, 4731. Installation seat, 48. Nailing mechanism, 481. Nailing component, 482. Installation machine frame, 483. Servo motor, 5. Second fabric stretching and nailing device, 51. Second machine frame, 52. Second support guide rail, 53. Second sliding frame, 531. X-axis sliding track, 532. Y-axis sliding track, 533. Installation frame, 54. Second hemming component, 541. Second hemming plate, 55. Corner folding device, 551. Corner folding mechanism, 5511. Corner folding plate, 55111. Insertion corner part, 552. Second sliding base, 56. Horizontal positioning mechanism, 561. Horizontal positioning component, 5611. Positioning block, 5612. Horizontal positioning cylinder, 57. Vertical positioning mechanism, 571. Vertical positioning component, 5711. Positioning rod, 5712. Vertical positioning cylinder, 6. Material transfer device, 61. Clamping and material transfer mechanism, 611. Bracket, 612. Clamping component, 6121. First cylinder, 6122. Bottom clamping plate, 6123. Second cylinder, 6124. Top clamping plate, 613. Sliding component, 7. Connection platform, 71. T-shaped groove, 711. First sliding groove, 712. Second sliding groove, 8. Driving cylinder. Detailed implementation manners

[0042] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0043] Refer to the attached Figure 1-16, An automatic picture stretching machine, comprising a feeding device, a first picture stretching and nailing device 4, a second picture stretching and nailing device 5, and a material moving device 6 for driving the movement of the picture frame and the picture paper. The feeding device includes a material placing table 1, a picture paper feeding device 2, and a picture frame feeding device 3. The picture paper feeding device 2 includes a first machine table 21 for placing stacked picture papers and a first feeding mechanism 22 for feeding the picture papers into the material placing table 1; the picture frame feeding device 3 includes a second machine table 31 for placing picture frames. The second machine table 31 is provided with a stacking station 311 and a waiting station 312. The waiting station 312 is arranged at one end close to the material placing table 1. A moving material taking mechanism 32 for moving the picture frame is arranged between the waiting station 312 and the feeding station 12; the first picture stretching and nailing device 4 and the second picture stretching and nailing device 5 are distributed in an L shape. A connecting platform 7 is arranged between the first picture stretching and nailing device 4 and the second picture stretching and nailing device 5. The material moving device 6 includes two sets of clamping and material moving mechanisms 61 respectively arranged in the first picture stretching and nailing device 4 and the second picture stretching and nailing device 5. The clamping and material moving mechanism 61 includes a bracket 611, two sets of clamping components 612 respectively arranged at both ends of the bracket 611, and a sliding component 613 for driving the movement of the bracket 611. A sliding groove 11 for the bracket 611 to slide is arranged on the material placing table 1. The connecting platform 7 is provided with a T-shaped groove 71 for the two sets of clamping and material moving mechanisms 61 to slide. The T-shaped groove 71 includes a first sliding groove 711 corresponding to the feeding direction of the first picture stretching and nailing device 4 and a second sliding groove 712 corresponding to the feeding direction of the second picture stretching and nailing device 5. The first picture stretching and nailing device 4 includes a first machine frame 41. The first machine frame 41 includes a first support guide rail 42 for placing the picture frame and the picture paper. The first support guide rail 42 is arranged at the same height as the material placing table 1 and the connecting platform 7. The first support guide rail 42 is respectively arranged on both sides of the clamping and material moving mechanism 61. The second picture stretching and nailing device 5 includes a second machine frame 51. The second machine frame 51 includes a second support guide rail 52 for placing the picture frame and the picture paper. The second support guide rail 52 is arranged at the same height as the connecting platform 7. The second support guide rail 52 is respectively arranged on both sides of the clamping and material moving mechanism 61.

[0044] In the solution of the present invention, the distance between the two first support guide rails 42 or the two second support guide rails 52 on both sides can be adjusted. The distances in the drawings are only for illustration to facilitate understanding.

[0045] In this embodiment, further settings are as follows: The clamping component 612 includes a bottom clamping plate 6122 connected to the first cylinder 6121 and a top clamping plate 6124 connected to the second cylinder 6123. The first cylinder 6121 and the second cylinder 6123 are distributed along the sliding direction of the bracket 611. The top clamping plate 6124 is an extension plate extending towards the first cylinder 6121. The top clamping plate 6124 and the bottom clamping plate 6122 are arranged vertically. The horizontal height of the bottom clamping plate 6122 is lower than the horizontal height of the picture frame when it is on the material placing table 1, and the horizontal height of the top clamping plate 6124 is higher than the horizontal height of the picture frame when it is on the material placing table 1.

[0046] In this embodiment, further settings are as follows: The first feeding mechanism 22 includes a feeding guide rail 221 for limiting the movement of the drawing paper and arranged between the first machine table 21 and the material placing table 1. The material placing table 1 includes a feeding station 12 and a feeding belt 13 for moving the drawing paper on the first machine table 21 along the feeding guide rail 221 to the feeding station 12. The feeding belt 13 is arranged parallel to the feeding guide rail 221 and below the feeding guide rail 221. An absorbing mechanism 222 for sucking the drawing paper on the first machine table 21 and sending one end of the drawing paper into the feeding guide rail 221 is arranged on the first machine table 21. An active tensioning wheel 223 for pressing the drawing paper to make it close to the feeding belt 13 is arranged between the first machine table 21 and the feeding belt 13. The active tensioning wheel 223 is controlled to lift and lower by a pneumatic mechanism 224.

[0047] In this embodiment, further settings are as follows: A limiting component 33 for limiting the stacking of picture frames and a sliding conveying mechanism 34 for conveying the picture frames to the waiting station 312 are arranged between the stacking station 311 and the waiting station 312. A feeding port 331 for a single picture frame to pass through is arranged between the lower end of the limiting component 33 and the sliding conveying mechanism 34.

[0048] In this embodiment, further settings are as follows: A first sliding frame 43 is arranged below the first support guide rail 42. First sliding bases 44 are respectively arranged on both sides of the first sliding frame 43. The sliding direction of the first sliding bases 44 is perpendicular to the feeding direction of the first cloth stretching and nailing device 4. The first support guide rail 42 is arranged on the first sliding bases 44. An installation strip 45 is arranged on the first sliding bases 44. The first support guide rail 42 is detachably connected to the inner side of the installation strip 45 through a connecting rod. A first edge folding component 46 for driving the drawing paper to bend towards the outside of the picture frame is arranged on the outer side of the installation strip 45. The first edge folding component 46 includes a first edge folding plate 461 and a driving cylinder 8 for driving the first edge folding plate 461 to move up and down. The first sliding bases 44 are electrically connected to a control mechanism, and the control mechanism adjusts the distance between the two first support guide rails 42 by controlling the first sliding bases 44 to slide along the first sliding frame 43.

[0049] In this embodiment, it is further provided that: the first fabric nailing device 4 further includes a fabric tensioning mechanism 47 and a nailing mechanism 48 arranged on both sides of the first support guide rail 42. The fabric tensioning mechanism 47 includes a mounting bracket 471 and a clamping assembly 472 arranged on the mounting bracket 471. Mechanical slide rails 473 are respectively arranged at the front and rear ends above the first machine frame 41. The sliding direction of the mechanical slide rails 473 is perpendicular to the feeding direction of the first fabric nailing device 4. The mechanical slide rails 473 include mounting seats 4731. The front and rear ends of the mounting bracket 471 are respectively arranged on the mounting seats 4731. The mounting seats 4731 slide along the mechanical slide rails 473 to drive the clamping assemblies 472 on both sides to slide left and right respectively. The clamping assembly 472 includes a fixed clamping plate 4721 fixedly installed on the outer side of the mounting bracket 471, a movable clamping plate 4722 hinged to the fixed clamping plate 4721, and a driving cylinder 8 for driving the movable clamping plate 4722. The movable clamping plate 4722 includes a first hinged portion 47221 for hinged connection with the fixed clamping plate 4721 and a movable clamping portion 47222 for clamping the drawing paper. The first hinged portion 47221 and the movable clamping portion 47222 are arranged in a "7" shape. A second hinged portion 47223 hinged to the driving cylinder 8 is further arranged between the first hinged portion 47221 and the movable clamping portion 47222.

[0050] In this embodiment, it is further provided that: at the other end of the movable clamping portion 47222 relative to the second hinged portion 47223, a mounting slot is provided, and a clamping rubber strip is arranged in the mounting slot.

[0051] In this embodiment, it is further provided that: the fixed clamping plate 4721 includes a mounting portion connected to the mounting bracket 471, a connecting portion hinged to the movable clamping plate 4722, and a fixed clamping portion for clamping the drawing paper. A pressing piece is arranged on one side of the fixed clamping portion relative to the movable clamping portion 47222.

[0052] In this embodiment, it is further provided that: the movable clamping plate 4722 is arranged below the mounting bracket 471, the driving cylinder 8 is arranged above the mounting bracket 471. A through hole is provided at the position of the mounting bracket 471 corresponding to the second hinged portion 47223. The driving rod of the driving cylinder 8 passes through the through hole and is hinged to the second hinged portion 47223.

[0053] In this embodiment, it is further provided that: the nailing mechanism 48 includes a nailing assembly 481, a mounting machine frame 482, and a servo motor 483. The two ends of the mounting machine frame 482 are respectively connected to the mounting seats 4731 and are arranged parallel to the mounting bracket 471. The nailing assembly 481 is slidably arranged on the mounting machine frame 482. The servo motor 483 drives the nailing assembly 481 to slide along the mounting machine frame 482 and approach the clamping assembly 472 to nail the folded drawing paper and the picture frame.

[0054] In this embodiment, it is further provided that: a second sliding frame 53 is arranged below the second support guide rail 52. The second sliding frame 53 includes an X-axis sliding track 531 and a Y-axis sliding track 532. The sliding direction of the X-axis sliding track 531 is arranged parallel to the feeding direction of the second fabric stretching and nailing device 5, and the sliding direction of the Y-axis sliding track 532 is arranged perpendicular to the feeding direction of the second fabric stretching and nailing device 5. The X-axis sliding track 531 is arranged on a mounting frame 533, and the mounting frame 533 is arranged on the Y-axis sliding track 532. The X-axis sliding track 531 and the Y-axis sliding track 532 are respectively electrically connected to a control mechanism. The second support guide rail 52 is detachably connected to the mounting frame 533 through a connecting piece. A second edge folding assembly 54 for driving the drawing paper to bend outward from the picture frame is further arranged on the mounting frame 533. The second edge folding assembly 54 includes a second edge folding plate 541 and a driving cylinder 8 for driving the second edge folding plate 541 to move up and down.

[0055] In this embodiment, it is further provided that: a corner folding device 55 is further arranged on the second frame 51. The corner folding device 55 includes four groups of corner folding mechanisms 551 respectively arranged in the four diagonal directions of the picture frame. The corner folding mechanism 551 includes a corner folding plate 5511. The corner folding plate 5511 is arranged on a second sliding base 552 inside the second edge folding plate 541. The corner folding plate 5511 includes an inserting corner part 55111 arranged in a right triangle shape. The second sliding base 552 is slidably arranged on the X-axis sliding track 531. The corner folding plates 5511 on the same side are arranged oppositely and relatively move through the X-axis sliding track 531 on the same side.

[0056] In this embodiment, it is further provided that: a lifting assembly for driving the corner folding plate 5511 to move up and down is arranged on the second sliding base 552, and the corner folding plate 5511 is arranged above the lifting assembly.

[0057] In the technical solution of the present invention, regarding the corner folding of the drawing paper and the picture frame, refer to the schematic diagram of the folding process of the picture frame and the drawing paper in the appendix Figure 16 The appendix Figure 16 shows the schematic diagrams of the corner folding of qualified products and unqualified products (where there are various problems with the unqualified product b, only two cases are schematically shown in the figure, but not limited to these two cases, and the two cases do not necessarily occur simultaneously). When the inserted corner is too deep or too shallow, the outer side of the folded edge may be more than the outside of the frame or less than the inside of the frame, and a right-angled folded edge cannot be formed and be flush with the outer side of the adjacent side, which is not beautiful and is an unqualified product; and picture frames of different sizes have different widths of the single side of the picture frame, so the inserted depth needs to be adjusted according to the different widths of the picture frame; for picture frames of different thicknesses, in order to improve the quality of the corner wrapping, the inserted height of the inserting corner plate also needs to be adjusted; and for different materials of the drawing paper or canvas, in order to improve the quality of the corner wrapping, the angle of the corner folding part also needs to be adjusted.

[0058] In this embodiment, it is further provided that: the folding angle device 55 further includes a lateral positioning mechanism 56. The lateral positioning mechanism 56 includes lateral positioning components 561 respectively arranged on both sides of the second support guide rail 52. The lateral positioning component 561 includes a positioning block 5611 and a lateral positioning cylinder 5612 for driving the positioning block 5611 to clamp or move away from the picture frame. The horizontal height of the positioning block 5611 is higher than that of the second support guide rail 52. The folding angle device 55 further includes a longitudinal positioning mechanism 57. The longitudinal positioning mechanism 57 includes four groups of longitudinal positioning components 571. The longitudinal positioning component 571 includes a positioning rod 5711 and a longitudinal positioning cylinder 5712 for driving the positioning rod 5711. The positioning rod 5711 is arranged parallel to the second support guide rail 52. The longitudinal positioning component 571 is arranged inside the folding angle plate 5511 and is detachably connected to the folding angle plate 5511.

[0059] The specific operation of the technical solution of the present invention is as follows: S1: The material suction mechanism 222 sucks the drawing paper on the first machine table 21, then moves upward to a specified height and then moves forward to feed one end of the drawing paper into the feeding guide rail 221. The movable tensioning wheel 223 presses the drawing paper to make it adhere to the feeding belt 13, and the feeding belt 13 drives the drawing paper to move along the feeding guide rail 221 to the loading station 12; S2: The moving material taking mechanism 32 moves the picture frame at the material waiting station 312 to the drawing paper at the loading station 12 to realize the relative positioning of the drawing paper and the picture frame; S3: The clamping component 612 at the front end clamps the picture frame and the drawing paper at the loading station 12, and the sliding component 613 drives the two groups of clamping components 612 to move backward through the bracket 611. The clamping component 612 drives the picture frame and the drawing paper to slide along the first support rail 42 into the first cloth stretching and nailing device 4; S4: The driving cylinders on both sides drive the first folding plate 461 to move upward along both sides of the picture frame, so that the drawing paper is bent; S5: The clamping components 472 on both sides respectively clamp the bent drawing paper on both sides. The clamping component 612 releases the picture frame and the drawing paper and retracts to disengage from the picture frame and the drawing paper. (The clamping component 612 can be reset by means of a lifting cylinder to make it lower than the picture frame for reset movement; it can also be reset by clamping the drawing paper by the clamping component 472 and moving it upward to make the clamping component 612 lower than the picture frame for reset movement) (that is, when clamping the picture frame, it can be clamped by a single cylinder cooperating with a fixed plate or by two upper and lower cylinders to expand the protection scope. When using a single cylinder, the clamping component 472 clamps the drawing paper to make the picture frame move upward and tighten, and the clamping component is reset below the picture frame to protect multiple possible solutions), and then moves forward to reset; S6: The control mechanism drives the clamping components 472 on both sides to slide relatively inward along the mechanical slide rail 473 through the mounting seat 4731, so that the drawing paper is pulled inward to be in a tight state with the picture frame; S7: The nailing mechanism 48 nails the picture frame and the drawing paper and then places them on the first support rail 42; S8: When the clamping component 612 at the reset front end clamps the picture frame and the drawing paper at the loading station 12, the clamping component 612 at the rear end clamps the semi-finished products with the canvas nailed on both sides of the first machine frame 41. The sliding component 613 drives the two groups of clamping components 612 to move backward through the bracket 611. The clamping component 612 drives the picture frame, the drawing paper and the semi-finished products to slide along the first support rail 42 into the first cloth stretching and nailing device 4 and the connecting platform 7 respectively; S9: One end of the clamping and moving mechanism 61 in the direction of the second cloth stretching and nailing device 5 moves into the second chute 712. The clamping component 612 at the front end clamps the semi-finished product, and then the two groups of clamping components 612 of the clamping and moving mechanism 61 in the direction of the first cloth stretching and nailing device 4 are released; S10: The clamping component 612 at the front end in the direction of the second cloth stretching and nailing device 5 moves the semi-finished product into the second cloth stretching and nailing device 5; S11: The lateral positioning mechanism 56 and the longitudinal positioning mechanism 57 work simultaneously (or successively) to adjust and position the picture frame; S12: After the folding plates 5511 on the four sides fold the corners of the drawing paper as the second sliding base 552 slides, they retract and reset;S13: The driving cylinders on both sides drive the second hemming plate 541 to move upward along both sides of the picture frame, causing the drawing paper to bend; S14: The second canvas nailing device 5 tightens and nails the canvas on the other two sides; S15: While the clamping component 612 at the front end of the second canvas nailing device 5 in the reset direction moves the semi-finished product into the second canvas nailing device 5, the clamping component 612 at the rear end of the second canvas nailing device 5 in the reset direction moves the finished product with the canvas nailed on all four sides from the second canvas nailing device 5 to the discharging station.

[0060] The above specific step sequence is for the convenience of explaining the production process of a single frameless painting. In the actual production process, the frameless paintings at multiple workstations can perform the corresponding processes simultaneously, and their step sequences can be carried out synchronously without being limited to the order of precedence.

[0061] In the technical solution of the present invention, the longitudinal positioning component 571 and the folding angle plate 5511 are respectively connected to the lifting component. The lifting component can drive the folding angle plate 5511 and the longitudinal positioning component 571 to move up and down simultaneously. After positioning and folding the angle, it descends below the upper end surface of the second support guide rail 52, so as to facilitate the picture frame with the canvas tightened and nailed to move out along the second support guide rail 52.

[0062] In the technical solution of the present invention, the described driving methods such as the servo motor and the cylinder should not be limited to a single driving method, and the possibility of using other driving methods such as electric push rods is not excluded.

[0063] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The "inner" and "outer" are based on the central axis of the first canvas nailing device 4 or the second canvas nailing device 5. The side closer to the central axis is the inner side, and the opposite is the outer side. The "front" and "rear" are based on the feeding direction of the first canvas nailing device 4 or the second canvas nailing device 5. The feeding direction is the front end, and the material moving direction is the rear end, that is, the picture frame and the canvas both move from the front end to the rear end of the first canvas nailing device 4 or the second canvas nailing device 5. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The above "between" not only refers to the orientation and position, but also includes the meaning of the interaction between different parts.

[0064] Although the terms such as material placing table 1, sliding groove 11, loading station 12, feeding belt 13, drawing paper loading device 2, first machine table 21, first loading mechanism 22, feeding guide rail 221, material suction mechanism 222, movable tension pulley 223, pneumatic mechanism 224, picture frame loading device 3, second machine table 31, stacking station 311, waiting material station 312, moving material taking mechanism 32, limiting component 33, feeding port 331, sliding conveying mechanism 34, first cloth stretching and nailing device 4, first machine frame 41, first support guide rail 42, first sliding frame 43, first sliding base 44, mounting strip 45, first hemming component 46, first hemming plate 461, cloth stretching mechanism 47, mounting bracket 471, clamping component 472, fixed clamping plate 4721, movable clamping plate 4722, first hinge part 47221, movable clamping part 47222, second hinge part 47223, mechanical slide rail 473, mounting seat 4731, nailing mechanism 48, nailing component 481, mounting machine frame 482, servo motor 483, second cloth stretching and nailing device 5, second machine frame 51, second support guide rail 52, second sliding frame 53, X-axis sliding track 531, Y-axis sliding track 532, mounting frame 533, second hemming component 54, second hemming plate 541, corner folding device 55, corner folding mechanism 551, corner folding plate 5511, inserting corner part 55111, second sliding base 552, lateral positioning mechanism 56, lateral positioning component 561, positioning block 5611, lateral positioning cylinder 5612, longitudinal positioning mechanism 57, longitudinal positioning component 571, positioning rod 5711, longitudinal positioning cylinder 5712, material moving device 6, clamping and material moving mechanism 61, bracket 611, clamping component 612, first cylinder 6121, bottom clamping plate 6122, second cylinder 6123, top clamping plate 6124, sliding component 613, connecting platform 7, T-shaped groove 71, first chute 711, second chute 712, driving cylinder 8 are used more frequently in this article, it does not exclude the possibility of using other terms. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An automatic stretch painting machine, characterized in that: The invention comprises a feeding device, a first cloth-stretching nailing device, a second cloth-stretching nailing device and a material-shifting device for moving picture frames and drawing papers, the feeding device comprises a loading table, a drawing paper feeding device and a picture frame feeding device, the drawing paper feeding device comprises a first machine for placing stacked drawing papers and a first feeding mechanism for feeding drawing papers into the loading table; the picture frame feeding device comprises a second machine for placing picture frames, the second machine is provided with a stacking station and a waiting station, the waiting station is provided at one end close to the loading table, a moving material-taking mechanism for moving picture frames is provided between the waiting station and the feeding station; the first cloth-stretching nailing device and the second cloth-stretching nailing device are distributed in an L shape, a connecting platform is provided between the first cloth-stretching nailing device and the second cloth-stretching nailing device, the material-shifting device comprises two groups of clamping and material-shifting mechanisms respectively provided in the first cloth-stretching nailing device and the second cloth-stretching nailing device, the clamping and material-shifting mechanisms include The invention relates to a bracket, two groups of material clamping components respectively arranged at both ends of the bracket and a sliding component that drives the bracket to move, the material placement table is provided with a sliding groove for the bracket to slide, the connecting platform is provided with a T-slot for the two groups of clamping and moving material mechanisms to slide, the T-slot includes a first slide groove corresponding to the feeding direction of the first cloth-stretching and nailing device and a second slide groove corresponding to the feeding direction of the second cloth-stretching and nailing device, the first cloth-stretching and nailing device includes a first frame, the first frame includes a first supporting rail for placing a picture frame and drawing paper, the first supporting rail is arranged at the same height as the material placement table and the connecting platform, the first supporting rail is respectively arranged on both sides of the clamping and moving material mechanism, the second cloth-stretching and nailing device includes a second frame, the second frame includes a second supporting rail for placing a picture frame and drawing paper, the second supporting rail is arranged at the same height as the connecting platform, and the second supporting rail is respectively arranged on both sides of the clamping and moving material mechanism.

2. An automatic stretch painting machine according to claim 1, characterized in that: The clamping assembly includes a bottom clamping plate connected to the first cylinder and a top clamping plate connected to the second cylinder, the first cylinder and the second cylinder are distributed along the sliding direction of the bracket, the top clamping plate is an extension plate extended toward the first cylinder, the top clamping plate and the bottom clamping plate are arranged up and down, the horizontal height of the bottom clamping plate is lower than the table surface of the material placement table, and the horizontal height of the top clamping plate is higher than the horizontal height when the picture frame is located on the material placement table.

3. An automatic stretch painting machine according to claim 1, characterized in that: The first feeding mechanism includes a feeding guide rail arranged between the first machine and the loading platform for limiting the movement of the drawing paper. The loading platform includes a loading station and a feeding belt used to move the drawing paper on the first machine to the loading station along the feeding guide rail. The feeding belt is arranged parallel to the feeding guide rail and below the feeding guide rail. A suction mechanism for sucking up the drawing paper and feeding one end of the drawing paper into the feeding guide rail is arranged on the first machine. An active tensioning wheel for pressing the drawing paper to make it close to the feeding belt is arranged between the first machine and the feeding belt. The active tensioning wheel is controlled to rise and fall by a pneumatic mechanism.

4. An automatic stretch painting machine according to claim 1, characterized in that: A limiting assembly for limiting the stacking of picture frames and a sliding conveying mechanism for conveying the picture frames to the waiting station are arranged between the stacking station and the waiting station, and a feeding port for a single picture frame to pass through is arranged between the lower end of the limiting assembly and the sliding conveying mechanism.

5. An automatic stretch painting machine according to claim 1, characterized in that: A first sliding frame is arranged below the first supporting guide rail, and first sliding bases are arranged on both sides of the first sliding frame respectively, and the sliding direction of the first sliding base is arranged perpendicular to the feeding direction of the first cloth-stretching and nailing device, the first supporting guide rail is arranged on the first sliding base, and a mounting bar is arranged on the first sliding base, and the first supporting guide rail is detachably connected to the inner side of the mounting bar through a connecting rod, and a first folding component for bending the animation paper toward the outside of the picture frame is arranged on the outer side of the mounting bar, the first folding component includes a first folding plate and a driving cylinder that drives the first folding plate to move up and down, and the first sliding base is electrically connected to the control mechanism, and the control mechanism adjusts the distance between the first supporting guide rails on both sides by controlling the first sliding base to slide along the first sliding frame.

6. An automatic stretch painting machine according to claim 1, characterized in that: The first cloth-stretching and nailing device also includes a cloth-stretching mechanism and a nailing mechanism arranged on both sides of the first supporting guide rail, the cloth-stretching mechanism includes a mounting bracket and a clamping assembly arranged on the mounting bracket, mechanical slide rails are respectively arranged at the front and rear ends above the first frame, the sliding direction of the mechanical slide rails is arranged perpendicular to the feeding direction of the first cloth-stretching and nailing device, the mechanical slide rails include a mounting seat, the front and rear ends of the mounting bracket are respectively arranged on the mounting seat, the mounting seat slides along the mechanical slide rails to respectively drive the clamping assemblies on both sides to slide left and right, the clamping assembly includes a fixed clamping plate fixedly installed on the outside of the mounting bracket, a movable clamping plate hinged to the fixed clamping plate, and a driving cylinder for driving the movable clamping plate, the movable clamping plate includes a first hinged portion for being hingedly connected to the fixed clamping plate and a movable clamping portion for clamping the drawing paper, the first hinged portion and the movable clamping portion are arranged in a "7" shape, and a second hinged portion hingedly connected to the driving cylinder is also arranged between the first hinged portion and the movable clamping portion.

7. An automatic stretch painting machine according to claim 6, characterized in that: The nailing mechanism includes a nailing assembly, a mounting frame and a servo motor. Both ends of the mounting frame are respectively connected to the mounting seat and are arranged parallel to the mounting bracket. The nailing assembly is slidably arranged on the mounting frame. The servo motor drives the nailing assembly to slide along the mounting frame and approach the clamping assembly to nail the folded drawing paper and the picture frame.

8. An automatic stretch painting machine according to claim 1, characterized in that: A second sliding frame is arranged below the second supporting guide rail, and the second sliding frame includes an X-axis sliding track and a Y-axis sliding track. The sliding direction of the X-axis sliding track is arranged parallel to the feeding direction of the second cloth-stretching and nailing device, and the sliding direction of the Y-axis sliding track is arranged perpendicular to the feeding direction of the second cloth-stretching and nailing device. The X-axis sliding track is arranged on the mounting frame, and the mounting frame is arranged on the Y-axis sliding track. The X-axis sliding track and the Y-axis sliding track are electrically connected to the control mechanism respectively. The second supporting guide rail is detachably connected to the mounting frame through a connecting piece. The mounting frame is also provided with a second folding assembly for bending the animation paper toward the outside of the picture frame. The second folding assembly includes a second folding plate and a driving cylinder for driving the second folding plate to move up and down.

9. An automatic stretch painting machine according to claim 8, characterized in that: The second frame is also provided with a folding device, which includes four groups of folding mechanisms respectively arranged in four diagonal directions of the picture frame, and the folding mechanism includes a folding plate, and the folding plate is arranged on the second sliding base on the inner side of the second folding plate. The folding plate includes an inserting corner portion arranged in a right-angled triangle, and the second sliding base is slidably arranged on the X-axis sliding track, and the folding plates on the same side are arranged opposite to each other and move relatively through the X-axis sliding track on the same side.

10. An automatic stretch painting machine according to claim 9, characterized in that: The folding device also includes a transverse positioning mechanism, which includes transverse positioning components respectively arranged on both sides of the second supporting guide rail, and the transverse positioning components include a positioning block and a transverse positioning cylinder driving the positioning block to clamp or move away from the picture frame, and the horizontal height of the positioning block is higher than the second supporting guide rail; the folding device also includes a longitudinal positioning mechanism, which includes four groups of longitudinal positioning components, and the longitudinal positioning components include a positioning rod and a longitudinal positioning cylinder for driving the positioning rod, the positioning rod is arranged parallel to the second supporting guide rail, and the longitudinal positioning component is arranged on the inner side of the folding plate and is detachably connected to the folding plate.

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