Canvas stretching frame nailing machine

Abstract

The invention discloses a canvas stretching frame nailing machine which sequentially comprises a frame feeding station, a nailing station, a frame transferring and overturning station and another nailing station. By means of linear movement of the two supporting plate assemblies and the picture frame transferring and overturning station, picture frame transferring is achieved, meanwhile, the stations can work orderly at the same time, and whole-course automation of canvas stretching and nailing is achieved; and the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic frame stretching and nailing of picture frames and canvases, and in particular to a canvas frame stretching and nailing machine. Background Art

[0002] During the prefabrication process of canvas (usually oil painting canvas), the canvas needs to be nailed to the frame in advance. At present, the method of manually stretching the frame and nailing is generally adopted, which is difficult to operate and has poor results. Some manufacturers have also developed equipment that can automatically stretch the frame and nail, but they cannot achieve automatic continuity of each process. The position and direction of the frame or canvas need to be manually adjusted between processes, resulting in a high degree of manual participation in the entire process flow, a low degree of automation, increased labor costs, and insufficient improvement in efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a canvas frame nailing machine that can realize full-process automatic operation, so as to improve the working efficiency of canvas frame nailing.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A canvas frame nailing machine, comprising a frame loading station, a nailing station, a frame transfer and flipping station and another nailing station in sequence;

[0006] The canvas stretch frame nailing machine also includes a first pallet assembly and a second pallet assembly for transferring the picture frame along the workstation, the first pallet assembly includes a canvas pallet, a picture frame limiting pallet 1 and a picture frame placing pallet 1 fixed in sequence, and the second pallet assembly includes a picture frame limiting pallet 2 and a picture frame placing pallet 2 fixed in sequence; the surfaces of the picture frame limiting pallet 1 and the picture frame limiting pallet 2 are respectively provided with a pair of limiting plates with a spacing matching the picture frame width, so that when the picture frame is placed in the limiting area of ​​the limiting plate, the canvas is folded upwards;

[0007] The picture frame loading station is provided with a canvas suction mechanism, a picture frame storage rack arranged at the outside, and a picture frame pushing mechanism for pushing the picture frame into the picture frame loading station. After the canvas suction mechanism sucks the canvas on the canvas support plate, the picture frame limiting support plate 1 moves to the picture frame loading station, and then the picture frame pushing mechanism pushes the picture frame above the canvas and places it in the limiting plate of the picture frame limiting support plate 1.

[0008] The nailing station is provided with two sets of canvas edge clamping mechanisms and two rows of nail guns arranged along the length direction. After the canvas edge clamping mechanisms clamp the edges of the folded-up canvas, the edges of the canvas are fixed to the back side of the picture frame by the nail guns.

[0009] The picture frame transfer and flipping station can clamp the picture frame placed on the picture frame tray one, and transfer the picture frame to the picture frame limiting tray two after rotating it horizontally by 90 degrees, and then the picture frame limiting tray two is moved to another nailing station for nailing.

[0010] Preferably, the canvas suction mechanism includes two rows of suction cups corresponding to the edges of the canvas on both sides respectively, each row of suction cups is fixed on a suction cup fixing rod, and the suction cup fixing rod can perform lifting and horizontal movements under the drive of external force, so that after the suction cups absorb the canvas, the two rows of suction cups can synchronously move in opposite directions outward to flatten the canvas.

[0011] Preferably, a plurality of picture frames are stacked in the picture frame storage rack, and the picture frame pushing mechanism comprises a pushing block corresponding to the bottommost picture frame, and the pushing block is fixedly connected to a rack, and the rack can move linearly driven by a gear; a frame connecting cylinder is provided at the other end of the rack, and an L-shaped frame connecting support block is provided at the output end of the frame connecting cylinder; the picture frame loading station is also provided with a pressing cylinder for pressing the picture frame and the canvas into an upper limit area of ​​a picture frame limit support plate.

[0012] Preferably, the nailing station is provided with a lift to control the overall vertical movement of the nailing station.

[0013] Preferably, the canvas edge clamping mechanism comprises two symmetrically arranged edge clamping frames, which respectively match the positive and negative threads of the positive and negative screw rods, so that when the positive and negative screw rods rotate, the two edge clamping frames can move in opposite directions at the same time; the edge clamping frames are connected with edge clamps which are opened and closed by cylinders, and the edge clamps are composed of two clamping plates corresponding to the edges of the canvas.

[0014] Preferably, the first support plate assembly and the second support plate assembly respectively achieve linear movement through the transmission of a screw nut.

[0015] Preferably, the picture frame transfer and flipping station is provided with a lifting cylinder, a picture frame clamping mechanism connected to the output end of the lifting cylinder, and a flipping motor, wherein the flipping motor can drive the picture frame clamping mechanism to rotate horizontally; the picture frame clamping mechanism includes a plurality of clamp cylinders corresponding to the picture frame borders.

[0016] Preferably, the lifting cylinder is fixed on a sliding frame, and the sliding frame can move linearly under the drive of external force.

[0017] Preferably, the four corners of the picture frame clamping mechanism are also provided with folding mechanisms, which include a folding cylinder and a folding knife provided at the output end of the folding cylinder, and the folding knife corresponds to the border of the picture frame.

[0018] Preferably, a discharge suction cup is provided at the end of the canvas stretcher nailing machine.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention realizes the transfer of the picture frame through the linear movement of two groups of pallet assemblies and the picture frame transfer and flipping stations, and at the same time enables each station to carry out orderly work at the same time, thereby realizing the full automation of canvas stretching frame nailing and greatly improving work efficiency.

[0021] 2. The picture frame loading station of the present invention realizes the feeding of canvas and picture frame through the cooperation of canvas suction mechanism and picture frame pushing mechanism. It has a simple structure and good working stability, and can ensure the flatness of canvas, thereby improving product quality.

[0022] 3. The nailing mechanism of the present invention clamps the edge of the canvas with nails through the canvas clamping mechanism and then performs the nailing operation through the nail gun, which ensures the accuracy of nailing to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the bottom structure of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the picture frame loading station and the first support plate assembly in the present invention.

[0026] Figure 4 It is a structural schematic diagram of the picture frame loading station in the present invention (one of the side panels is hidden in the figure).

[0027] Figure 5 yes Figure 4 A is an enlarged schematic diagram.

[0028] Figure 6 yes Figure 4 A magnified schematic diagram of B.

[0029] Figure 7 It is a structural schematic diagram of the nailing station in the present invention.

[0030] Figure 8 yes Figure 7 Schematic diagram of the structure of C.

[0031] Fig. 9 It is a structural schematic diagram of the picture frame clamping mechanism in the present invention.

[0032] Fig.10 yes Fig. 9 A magnified schematic diagram of D in the middle.

[0033] In the figure: 1. Picture frame loading station; 11. Canvas suction mechanism, 111. Canvas leveling cylinder, 112. Suction cup lifting cylinder, 113 Suction cup fixing frame, 114. Suction cup; 12. Picture frame storage rack, 121. Side plate, 122. Support roller, 123. Stop bar; 13. Picture frame pushing mechanism, 131. Rack, 132. Gear, 133. Pushing block, 134. Frame connecting cylinder, 135. Pushing roller, 136. Frame connecting support block, 137. Hollow groove, 138. Pressing cylinder, 139. Frame lifting cylinder; 2. Nailing station; 21. Elevator; 22. Canvas edge clamping mechanism, 22 1. Edge clamping frame, 222. Positive and negative screw rods, 223. Edge clamping clip; 23. Nail gun; 24. Gas tank; 3. Picture frame transfer and flipping station; 31. Sliding frame, 32. Lifting cylinder, 33. Picture frame clamping mechanism, 34. Flipping motor, 35. Clamp cylinder, 36. Folding cylinder, 37. Folding knife; 4. First pallet assembly, 41. Canvas pallet, 42. Picture frame limiting pallet 1, 43. Picture frame placing pallet 1, 44. Limiting plate, 45. Screw rod; 5. Second pallet assembly, 51. Picture frame limiting pallet 2, 52. Picture frame placing pallet 2; 6. Discharging suction cup; 7. Picture frame; 8. Canvas. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further specifically described below through embodiments.

[0035] Embodiment: A canvas frame nailing machine, referring to Figure 1-10 , including a picture frame loading station 1, a nailing station 2, a picture frame transfer and flipping station 3 and another nailing station sequentially arranged on the frame, forming a continuously working canvas stretching frame nailing production line. The canvas 8 and the picture frame 7 are loaded at the picture frame loading station 1, and then transported to the nailing station 2 for nailing of the canvas on the opposite sides, and then horizontally rotated 90° by the picture frame transfer and flipping station 3 and transferred to another nailing station at the rear end for nailing of the remaining two sides of the canvas.

[0036] In the above structure, the conveyance of the picture frame mainly relies on two groups of pallet assemblies that can move back and forth linearly. The first pallet assembly 4 is composed of a canvas pallet 41, a picture frame limiting pallet 42 and a picture frame placing pallet 43 that are fixed in sequence. In the initial position, the canvas pallet 41 is located at the outside of the picture frame loading station 1, the picture frame limiting pallet 42 is located at the picture frame loading station 1, and the picture frame placing pallet 43 is located at the nailing station 2. When the first pallet assembly 4 moves to the right, the canvas pallet 41 is located at the picture frame loading station 1, the picture frame limiting pallet 42 is located at the picture frame loading station 1, and the picture frame placing pallet 43 is located at the nailing station 2. Plate 1 42 is located at the nailing station 2, and picture frame placement pallet 1 43 is located at the front half of the picture frame transfer station 3; the second pallet assembly 5 is fixedly composed of a picture frame limiting pallet 2 51 and a picture frame placement pallet 2 52. In the initial position, the picture frame limiting pallet 2 51 is located at the rear half of the picture frame transfer and flipping station 3, and the picture frame placement pallet 2 52 is located at the rear nailing station 2. When the second pallet assembly 5 moves, the picture frame limiting pallet 2 51 is located at the rear nailing station 2, and the picture frame placement pallet 2 52 is located outside the nailing station. Among them, the canvas pallet 41 is used for stacking canvases 8, and its surface is provided with a square groove matching the size of the canvas, and the canvas is stacked in the square groove; the picture frame limiting pallet 42 and the picture frame limiting pallet 51 have the same structure, and two limiting plates 44 are provided on its surface along the picture frame conveying direction, and the spacing is slightly larger than the size of the picture frame. When the canvas 8 and the picture frame 7 are placed in the limiting area formed by the two limiting plates 44 at the same time, the opposite sides of the canvas will be folded upward at the same time under the constraint of the limiting plates 44 and form an angle of 90° with the horizontal plane; the picture frame placement pallet 43 and the picture frame placement pallet 52 have the same structure, and their surfaces can be flat.

[0037] The first pallet assembly 4 and the second pallet assembly 5 respectively realize their reciprocating linear movement through the transmission method of the screw nut. Taking the first pallet assembly 4 as an example, a screw 45 driven by a motor is provided along the length direction on the frame below the first pallet assembly 4. A nut matching the thread of the screw 45 is fixed to the bottom of the first pallet assembly 4. The linear movement of the nut is driven by the rotation of the screw 45, thereby controlling the reciprocating linear movement of the first pallet assembly 4.

[0038] The picture frame loading station 1 is provided with a canvas suction mechanism 11, a picture frame storage rack 12 arranged on the outside and a picture frame pushing mechanism 13 for pushing the picture frame into the picture frame loading station. When the canvas support plate 41 moves to the picture frame loading station 1, the canvas suction mechanism 11 sucks the canvas, and then the picture frame limiting support plate 1 42 moves to the picture frame loading station 1, and then the picture frame pushing mechanism 13 pushes the picture frame in the picture frame storage rack 12 to the top of the canvas and places it in the limiting area of ​​the picture frame limiting support plate 1 42.

[0039] The canvas suction mechanism 11 has two groups, which are symmetrically arranged, including a canvas leveling cylinder 111 fixed to the frame, a suction cup lifting cylinder 112 connected to the output end of the canvas leveling cylinder 111, a suction cup fixing frame 113 connected to the output end of the suction cup lifting cylinder 112, and a plurality of suction cups 114 evenly distributed on the suction cup fixing frame. The two groups of suction cups 114 are arranged in two rows corresponding to the two sides of the canvas respectively. The suction cup lifting cylinder 112 controls the suction cup to descend to suck the canvas. After the canvas is sucked and raised, the canvas leveling cylinder 111 controls the two groups of suction cups to move synchronously in opposite directions outward, thereby leveling the canvas.

[0040] The picture frame storage rack 12 includes two side panels 121. A row of supporting rollers 122 are provided on the inner side of each side panel relative to the bottom, which are used to support the picture frames and make rolling friction between the bottom picture frame and the supporting member, so that the bottom picture frame can be pushed out. A stop bar 123 is also provided on the edge of one side of the inner side of the side panel near the picture frame loading station, which is used to limit the remaining picture frames except the bottom picture frame.

[0041] The picture frame pushing mechanism 13 includes two groups of symmetrically arranged racks 131 driven by two coaxial gears 132. The racks 131 are set on the frame through tracks so that they can slide along the length direction. The two gears 132 rotate synchronously under the drive of the motor. The opposite ends of each group of racks 131 are respectively fixedly connected with a pushing block 133 and a frame connecting cylinder 134. The pushing block 133 corresponds to the lowest picture frame in the picture frame storage rack, and a group of pushing rollers 135 are also provided behind the pushing block 133 to support the upper picture frame when pushing the material to avoid friction caused by direct contact between the pushing block 133 and the upper picture frame; an L-shaped frame connecting support block 136 is provided at the output end of the frame connecting cylinder 134, which is used to connect the picture frame at the front end after the picture frame is pushed a certain distance by the pushing block 133 at the rear end. Specifically, the side plate 121 is provided with a hollow groove 137 for the pusher block 133 and the pusher roller 135 to move horizontally. When the gear 132 drives the rack 131 to rotate, the pusher block 133 pushes the bottom picture frame inward from the outside. After pushing a certain distance, the remaining picture frames above are lifted up by the frame lifting cylinder 139 below, so that the pusher roller 135 can smoothly enter the bottom of the remaining picture frames above, and the frame connecting cylinder 134 pushes out the L-shaped frame connecting support block 136 to make it against the front end of the picture frame; then the pusher block 133 continues to push the bottom picture frame forward until it all enters the designated position of the picture frame loading station, and the frame connecting cylinder 134 retracts to complete the unloading. It should be noted that during this process, the pusher roller 135 always supports the remaining picture frames above to facilitate the reset of the pusher block. After the pusher block 133 retreats and resets, the picture frame above falls, and the next push action can be performed.

[0042] In addition, the picture frame loading station 1 is also provided with a pressing cylinder 138 for pressing the picture frame into the upper limit area of ​​the picture frame limiting support plate 42, ensuring that the picture frame is completely pressed into the limiting area, thereby ensuring that the two sides of the canvas can be folded upwards.

[0043] The nailing station 2 can be raised and lowered as a whole, and synchronously running elevators 21 are respectively arranged at its four corners (the input power of the elevators is connected to each other through belts or connecting rods to achieve synchronous operation; the elevators adopt a conventional structure, which is not described in detail in this embodiment) to control the overall lifting and lowering of the nailing station 2. The nailing station 2 rises as a whole so that the picture frame limiting support plate 42 can smoothly enter under the nailing station, and then the nailing station moves down as a whole to perform the nailing operation.

[0044] The nailing station 2 is provided with two sets of canvas edge clamping mechanisms 22 and two sets of nail guns 23 that are symmetrical in front and back, wherein the canvas edge clamping mechanism 22 includes an edge clamping frame 221, and the left and right sides of the nailing station are respectively provided with synchronously running positive and negative screws 222 (the threads on both sides are symmetrical to each other), and the two positive and negative screws are connected by a synchronous belt and driven by a motor; the two ends of the edge clamping frame are matched with the threads of the positive and negative screws, and the two edge clamping frames are respectively located on the positive and negative threads of the positive and negative screws. When the positive and negative screws rotate, the two edge clamping frames can move in the opposite direction at the same time. The edge clamping frame is connected to an edge clamping clip 223 that is opened and closed by a cylinder, and the edge clamping clip is composed of two clamping plates corresponding to the edges of the canvas. In order to ensure the stability of operation, the two ends of the edge clamping frame 221 and the edge clamping clip 223 are respectively set on the nailing station through slide rails. The nail guns 23 are arranged in parallel on the upper outer side of the canvas clamping mechanism, and the nails correspond to the edges of the picture frame. In this embodiment, the nail guns are pneumatic nail guns, and are not directly connected to the air source one by one. Instead, each row of nail guns is first connected to a gas tank 24, and then the gas tank is connected to the air source, so that each nail gun in each row of nail guns applies equal force when working.

[0045] When the nailing station is working, the nailing station 2 is firstly raised as a whole, and after the picture frame limit support plate 42 enters under the nailing station, the nailing station moves down as a whole, so that the edge of the canvas folded upward enters between the two clamping plates of the edge clamping clamp 223, and then the edge clamping clamp 223 clamps the edge of the canvas, and then the positive and negative screw rods 222 rotate, so that the two sets of edge clamping clamps move inward synchronously. At the same time, the nailing station 2 moves down as a whole for a certain distance, so that the edge of the canvas folded at 90 degrees is folded inward, and the canvas will be further flattened in the process; then the nail gun performs the nailing operation, The two sides of the canvas are fixed to the picture frame; after the nailing of the two sides is completed, the edge clamping clamps 223 remain in the clamping state, and then the nailing station moves up as a whole to lift the picture frame. After the picture frame placement pallet 43 moves to the bottom of the nailing station 2, the nailing station moves down as a whole again to place the picture frame on the surface of the picture frame placement pallet and release the edge clamping clamps 223. Finally, the nailing station is reset upward. During the next nailing operation, after the picture frame limiting pallet 42 enters the nailing station again, the picture frame placement pallet 43 will enter the picture frame transfer and flipping station 3 behind, so as to complete the subsequent flipping and transfer of the picture frame nailed on both sides.

[0046] The picture frame transfer and flipping station 3 serves to take over the two nailing stations, so that the picture frame placement pallet 1 43 of the first pallet assembly and the picture frame limiting pallet 2 51 of the second pallet assembly can both enter this station. The picture frame transfer and flipping station 3 mainly flips the picture frame that has been nailed on both sides on the picture frame placement pallet 1 43 horizontally by 90° and transfers it to the picture frame limiting pallet 2 51.

[0047] The picture frame transfer and flipping station 3 is provided with a sliding frame 31 that can slide along the slide rail in the length direction. The sliding frame is fixed with a belt, which is driven by a motor to control the linear movement of the sliding frame 31. A lifting cylinder 32 is fixed on the sliding frame 31. A picture frame clamping mechanism 33 that can be lifted and lowered by a guide column is provided below the sliding frame, and the picture frame clamping mechanism 33 can rotate under the drive of the flipping motor 34. The picture frame clamping mechanism 33 includes eight clamping cylinders 35 corresponding to each edge of the picture frame near the end point and four folding mechanisms respectively located at the four corners. The folding mechanism includes a folding cylinder 36 and a folding knife 37 provided at the output end of the folding cylinder. The folding knife 37 corresponds to the edge of the picture frame that has not been folded from both sides inward, and is used for the folding action before the canvas is flipped.

[0048] When the picture frame placing pallet 1 43 enters the front end of the picture frame transfer and flipping station 3, the belt operation causes the sliding frame 31 to slide to the top of the picture frame placing pallet 1 43, and then the lifting cylinder 32 drives the picture frame clamping mechanism 33 to move downward, the clamp cylinder 35 clamps the picture frame and then drives the picture frame upward, and then the flipping motor 34 controls the picture frame to rotate horizontally 90°, so that the two sides without nails face the front and back sides; then the belt operation causes the sliding frame 31 to slide to the rear end of the picture frame transfer and flipping station, and after the picture frame limiting pallet 2 51 moves to the right below the sliding frame 31, the lifting cylinder 32 drives the picture frame to move downward, so that it enters the limiting area of ​​the picture frame limiting pallet 2 51, so that the two sides of the canvas that have not been nailed are folded upward, and in this process, the corner folding knife 37 is driven by the corner folding cylinder 36 to fold the corner inward to ensure that the corner folding is completed before flanging. After the placement is completed, the clamp cylinder 35 releases the picture frame, and the picture frame clamping mechanism 33 is reset to perform the next flipping and transfer action.

[0049] After the picture frame is received by the second picture frame limiting support plate 51, it moves to the nailing station 2 at the rear end for nailing operation. The nailing process is the same as the previous nailing process and will not be described in detail here. In the nailing process, the picture frame that has been nailed is transported to the outside by the second picture frame placement support plate 52. In this embodiment, a discharge suction cup 6 is provided at the end to suck up the nailed picture frame for subsequent discharge, which can be manual discharge or can be automatically discharged by providing a conveying device under the discharge suction cup 6.

[0050] When this embodiment is implemented, it is also necessary to cooperate with a control device such as a programmable logic controller to control the specific work of each driving component so that each work can be carried out in an orderly manner. In addition, due to the presence of the conveying and transfer devices, each process can be carried out simultaneously. For example, when the picture frame loading station 1 is loading, the nailing station 2 behind it is nailing the previous picture frame, and the picture frame transfer and flipping station 3 behind it is flipping and transferring the previous picture frame, and so on. This makes each process more compact, saves time, and achieves the result of improving efficiency.

[0051] During the specific operation of this embodiment, taking one of the picture frames as an example, first, the first support plate assembly 4 moves to the right, so that the canvas support plate 41 enters the picture frame loading station 1, and after the canvas suction mechanism 11 sucks the canvas, the first support plate assembly 4 moves to the left, so that the picture frame limit support plate 42 enters the picture frame loading station 1, and at the same time, the picture frame pushing mechanism 13 pushes the picture frame into the top of the canvas in the picture frame loading station 1, and then the canvas suction mechanism 11 and the picture frame pushing mechanism 13 are respectively released, and then the pressing cylinder 138 presses the picture frame and the canvas into the upper limit area of ​​the picture frame limit support plate 42, so that the front and rear ends of the canvas The side is turned upside down by 90°; then the picture frame limiting pallet 42 enters the nailing station 2 for nailing. After nailing, the picture frame is placed on the picture frame placing pallet 43, and then the picture frame is sent to the picture frame transfer and flipping station 3 through the movement of the picture frame placing pallet 43. The picture frame transfer and flipping station 3 flips the picture frame and transfers it to the limiting area of ​​the picture frame limiting pallet 51, and then it is transported to another nailing station through the movement of the second pallet assembly 5 to perform the remaining nailing operations on the two sides, and then the picture frame is placed on the picture frame placing pallet 52 and sent out through the movement of the picture frame placing pallet 2 for unloading.

[0052] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A canvas frame nailing machine, characterized in that: It includes a picture frame loading station, a nailing station, a picture frame transfer and flipping station and another nailing station in sequence; The canvas stretch frame nailing machine also includes a first pallet assembly and a second pallet assembly for transferring the picture frame along the workstation, the first pallet assembly includes a canvas pallet, a picture frame limiting pallet 1 and a picture frame placing pallet 1 fixed in sequence, and the second pallet assembly includes a picture frame limiting pallet 2 and a picture frame placing pallet 2 fixed in sequence; the surfaces of the picture frame limiting pallet 1 and the picture frame limiting pallet 2 are respectively provided with a pair of limiting plates with a spacing matching the picture frame width, so that when the picture frame is placed in the limiting area of ​​the limiting plate, the canvas is folded upwards; The picture frame loading station is provided with a canvas suction mechanism, a picture frame storage rack arranged at the outside, and a picture frame pushing mechanism for pushing the picture frame into the picture frame loading station. After the canvas suction mechanism sucks the canvas on the canvas support plate, the picture frame limiting support plate 1 moves to the picture frame loading station, and then the picture frame pushing mechanism pushes the picture frame above the canvas and places it in the limiting plate of the picture frame limiting support plate 1. The nailing station is provided with two sets of canvas edge clamping mechanisms and two rows of nail guns arranged along the length direction. After the canvas edge clamping mechanisms clamp the edges of the folded-up canvas, the edges of the canvas are fixed to the back side of the picture frame by the nail guns. The picture frame transfer and flipping station can clamp the picture frame placed on the picture frame tray one, and transfer the picture frame to the picture frame limiting tray two after rotating it horizontally by 90 degrees, and then the picture frame limiting tray two is moved to another nailing station for nailing.

2. A canvas frame nailing machine according to claim 1, characterized in that: The canvas suction mechanism includes two rows of suction cups corresponding to the edges of the canvas on both sides respectively, and each row of suction cups is fixed on a suction cup fixing rod. The suction cup fixing rod can perform lifting and horizontal movements under the drive of external force, so that after the suction cups absorb the canvas, the two rows of suction cups can synchronously move outward in opposite directions to flatten the canvas.

3. A canvas frame nailing machine according to claim 1, characterized in that: A plurality of picture frames are stacked in the picture frame storage rack, and the picture frame pushing mechanism comprises a pushing block corresponding to the bottom picture frame, and the pushing block is fixedly connected to a rack, and the rack can move linearly driven by a gear; a frame connecting cylinder is provided at the other end of the rack, and an L-shaped frame connecting support block is provided at the output end of the frame connecting cylinder; the picture frame loading station is also provided with a pressing cylinder for pressing the picture frame and the canvas into an upper limit area of ​​a picture frame limit support plate.

4. A canvas frame nailing machine according to claim 1, characterized in that: The nailing station is provided with a lift to control the overall vertical movement of the nailing station.

5. A canvas frame nailing machine according to claim 1, characterized in that: The canvas edge clamping mechanism includes two symmetrically arranged edge clamping frames, which are respectively matched with the positive and negative threads of the positive and negative screw rods, so that when the positive and negative screw rods rotate, the two edge clamping frames can move in opposite directions at the same time; the edge clamping frames are connected to edge clamps whose opening and closing are controlled by cylinders, and the edge clamps are composed of two clamping plates corresponding to the edges of the canvas.

6. A canvas frame nailing machine according to claim 1, characterized in that: The first support plate assembly and the second support plate assembly respectively achieve linear movement through the transmission mode of the screw rod and nut.

7. A canvas frame nailing machine according to claim 1, characterized in that: The picture frame transfer and flipping station is provided with a lifting cylinder, a picture frame clamping mechanism connected to the output end of the lifting cylinder, and a flipping motor. The flipping motor can drive the picture frame clamping mechanism to rotate horizontally. The picture frame clamping mechanism includes a plurality of clamp cylinders corresponding to the picture frame borders.

8. A canvas frame nailing machine according to claim 7, characterized in that: The lifting cylinder is fixed on a sliding frame, and the sliding frame can move linearly under the drive of external force.

9. A canvas frame nailing machine according to claim 7, characterized in that: The four corners of the picture frame clamping mechanism are respectively provided with folding mechanisms, which include a folding cylinder and a folding knife arranged at the output end of the folding cylinder, and the folding knife corresponds to the border of the picture frame.

10. A canvas frame nailing machine according to claim 1, characterized in that: A discharging suction cup is arranged at the end of the canvas stretch frame nailing machine.

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