Material frame palletizer and use method thereof

Abstract

The present invention relates to a material frame palletizer and a method for using the same, which solves the problems of poor smoothness, easy damage, and inability to meet the needs of material frame palletizing in existing palletizers. The device comprises a feeding area, a first working area, a second working area, and a discharging area in sequence. The feeding area and the discharging area are provided with a cart positioning mechanism and a material frame lifting mechanism. A feeding material frame push-pull mechanism is provided between the feeding area and the first working area. A plurality of transfer rollers composed of conveying rollers are provided between the first working area and the second working area. A material frame positioning and shaping mechanism is provided in the second working area. A discharging material frame push-pull mechanism is provided between the second working area and the discharging area. The discharging area is also provided with a material frame secondary positioning mechanism. The material frame bottom layer of the feeding area of ​​the present invention is discharged, and the material frames in the discharging area are stacked one by one from the bottom. The lifting amplitude is small, the lifting amount is consistent each time, the controllability is better, and long-term stable operation can be achieved. The present invention greatly reduces the demand for the number of carts.

Description

Technical Field

[0001] The invention belongs to the field of palletizers and relates to an automatic palletizer, in particular to a material frame palletizer and a use method thereof. Background Art

[0002] A material frame is a frame container for filling materials. If the material frame is completely flat, it will take up a lot of ground space. Therefore, the material frames are usually placed in multiple layers stacked up and down. In the process of filling materials into the empty material frame, it is necessary to take out the stacked material frames one by one, and then fill them with materials one by one, and then stack them again into a stacking structure. The traditional material frame taking out and stacking of the material frames before and after filling the materials are usually done manually, which is inefficient and labor-intensive. Especially when the stacking height is large, it is extremely burdensome to manually lift the material frames filled with materials. The stacking of the highest few layers is not only difficult to lift, but also easy to injure the operator.

[0003] Existing fully automatic palletizers, such as the Chinese patent CN117374773A published on December 3, 2021, are named a fully automatic shaping and palletizing device and method. The chassis of the device is input one by one. After the chassis arrives at the palletizing area, the materials are shaped one by one by a manipulator and stacked on the chassis from bottom to top for palletizing. The chassis is output after it is fully loaded with materials. The device uses a method of stacking materials by dropping them one by one from bottom to top on the chassis. During the falling process of the materials, impact force will be generated, causing damage and deformation. Moreover, the device is not suitable for the one-by-one removal, filling and stacking of material frame palletizing. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing palletizer uses a dropping method to stack materials one by one from bottom to top, which has poor smoothness, is easily damaged by the impact of dropping, and cannot meet the needs of material frame palletizing. A material frame palletizer and a use method thereof are provided, which are suitable for taking out, transferring, loading, and restacking stacked material frames one by one.

[0005] A technical solution adopted by the present invention to solve its technical problems is: a material frame palletizer, which includes a feeding area, a first working area, a second working area, and a discharging area in sequence. The feeding area and the discharging area are provided with a trolley positioning mechanism and a material frame lifting mechanism. A feeding material frame push-pull mechanism is provided between the feeding area and the first working area. A plurality of transfer rollers composed of conveying rollers are provided between the first working area and the second working area. The second working area is provided with a material frame positioning and shaping mechanism. A discharging material frame push-pull mechanism is provided between the second working area and the discharging area. The discharging area is also provided with a material frame secondary positioning mechanism.

[0006] The push-pull mechanism of the feed frame and the push-pull mechanism of the discharge frame realize the pushing of a single frame. The conveying rollers are rubber rollers. Each conveying roller realizes synchronous rolling conveying through transmission such as chains, pulleys or gears. In this scheme, the frames in the feed area are taken out one by one from the bottom layer, and the frames in the discharge area are stacked one by one from the bottom layer. The lifting amplitude is small, the lifting amount is consistent each time, and the controllability is better. In the process of transferring the frame from feeding to discharging, shaping, loading, and secondary stacking are realized, with a high degree of automation. Although the frame posture control method is rough, it is accurate and reliable, not prone to errors, and can achieve long-term continuous and stable operation. The feed cart of this device can be evacuated after the first lifting in the feed area, and the fully loaded feed cart is supplemented when the empty frame is used up. When the material frame in the discharge area reaches the maximum stacking height, the lifting mechanism in the discharge area places the material frame on the discharge cart and pushes it away, and the discharge cart is supplemented before the maximum stacking height is reached next time. When replenishing the material for the second time, two material frames of the first feeding are still rotating in the first working area and the second working area, that is, the discharging area is still two material frames away from being fully loaded. Therefore, theoretically, one cart can be used to realize feeding and discharging under the extreme condition. At this time, the sequence is feeding the cart once, feeding the cart twice, discharging the cart once, feeding the cart three times, discharging the cart twice...

[0007] Preferably, the cart positioning mechanism includes a front positioning plate for positioning the front end of the cart and side positioning cylinders for positioning both sides of the cart, the side positioning cylinders include two first side positioning cylinders and two second side positioning cylinders, the two first side positioning cylinders are symmetrically arranged on both sides of the rear end of the cart, and the two second side positioning cylinders are symmetrically arranged on both sides of the front end of the cart.

[0008] Preferably, the material frame lifting mechanism is symmetrically arranged on the left and right sides of the feeding area, and the material frame lifting mechanism is symmetrically arranged on the left and right sides of the discharging area. The material frame lifting mechanism includes a lifting slider that slides up and down, and a lifting plate that lifts the material frame laterally is arranged inwardly on the lifting slider. The material frame lifting mechanism also includes a bottom material frame detachment detection sensor. The bottom material frame detachment detection sensor in the feeding area detects whether the bottom material frame is empty, ensuring that the feeding push-pull mechanism takes away one material frame at a time. The bottom material frame detachment detection sensor in the feeding area detects whether the material frame on the discharging material frame push-pull mechanism is empty, ensuring that the lifting is successful, and preventing the discharging material frame push-pull mechanism from moving the material frame to the second working area.

[0009] Preferably, the lifting slider is an inverted U-shape, and lifting plates are arranged at the same height on both sides of the lower end of the lifting slider, and the material frame detachment detection sensor is arranged between the two lifting plates, and the lowest position of the lifting plate is lower than the position of the material frame detachment detection sensor.

[0010] Preferably, the lifting plate is a telescopic structure or a foldable structure that can be flipped upward, the lower surface of the lifting plate is a guiding inclined surface that tilts upward from the outside to the inside, and the upper surface of the lifting plate is a plane or an inwardly tilted inclined surface.

[0011] Preferably, a feed push-pull cylinder is provided between the sides of the feed area and the first working area, and a feed push-pull support plate is provided in linkage with the feed push-pull cylinder. A feed push-pull cross bar is provided at one end of the feed push-pull support plate facing the feed area, and the feed push-pull support plate is provided at the gap between the conveying rollers and the feed push-pull support plate is lower than the upper surface of the conveying roller, and the feed push-pull cross bar is perpendicular to the conveying roller and higher than the upper surface of the conveying roller. The feed push-pull support plate supports the bottom surface of the material frame, and two feed push-pull support plates can be provided, which are respectively provided between different gaps between conveying rollers to ensure stable support of the material frame. A guide slope is provided at the end of the conveying roller to ensure that the material frame can rise from the feed push-pull support plate to the surface of the conveying roller, and the feed push-pull cross bar is the main force-applying component for pushing and pulling the material frame.

[0012] Preferably, a discharging push-pull cylinder is provided between the second working area and the side of the discharging area, and a discharging push-pull tray is provided in linkage with the discharging push-pull cylinder. A discharging push-pull tray is provided at one end of the discharging push-pull tray away from the discharging area with a discharging push-pull cross bar. The discharging push-pull tray is arranged in the gap between the conveying rollers and the discharging push-pull tray is lower than the upper surface of the conveying roller, and the discharging push-pull cross bar is perpendicular to the conveying roller and higher than the upper surface of the conveying roller.

[0013] Preferably, the material frame positioning and shaping mechanism includes a material frame in-place detection sensor and a material frame shaping paddle that can move forward and backward to adjust the position of the material frame. The material frame in-place detection sensor is arranged at the end of the conveying roller in the second working area, and the material frame shaping paddle is arranged on the side of the second working area away from the discharging area. The material frame shaping paddle is arranged in the gap between the conveying rollers and the upper end of the material frame shaping paddle is higher than the upper surface of the conveying roller. The material frame shaping paddle is U-shaped and has a certain width for easy shaping. The material frame shaping paddle is lower than the discharging push-pull cross bar to avoid interference. Two material frame in-place detection sensors are arranged, and the spacing between the two material frame in-place detection sensors does not exceed the width of the material frame to ensure that both ends of the material frame are in place and not skewed.

[0014] Preferably, the secondary positioning mechanism of the material frame includes a telescopic top plate for positioning the side surface of the material frame and a telescopic baffle for positioning the end surface of the material frame, and the telescopic top plate and the telescopic baffle are both arranged symmetrically on the left and right.

[0015] A method for using a material frame palletizer, using the material frame palletizer, comprises the following steps:

[0016] Step a, placing a feeding cart with an empty material frame in the feeding area, and placing an empty discharging cart in the discharging area;

[0017] Step b, the material frame lifting mechanism in the feeding area clamps the bottom material frame and lifts all the empty material frames, the feeding material frame push-pull mechanism runs to the bottom of the bottom material frame, the lifting mechanism puts down all the empty material frames, and then rises one grid to clamp the second-to-last material frame and lift it up, when the bottom material frame detachment detection sensor detects that it is empty above the bottom material frame, it is considered that the bottom material frame has been detached, and at this time, the feeding material frame push-pull mechanism pushes and pulls the bottom material frame to the first working area;

[0018] Step c, the bottom material frame is transported to the second working area by the conveying roller, the material frame positioning and shaping mechanism adjusts the posture by the material frame shaping paddle, the material frame in place detection sensor detects whether the bottom material frame is in place, and after it is in place, the material is filled into the bottom material frame to form a material loading frame;

[0019] Step d, the lifting mechanism of the discharge area lifts the existing material loading frame in the discharge area, the lifting height is not less than the height of a single material frame, and the discharge frame push-pull mechanism pushes and pulls the material loading frame in the second working area to the discharge area;

[0020] Step e, the material frame secondary positioning mechanism secondary positions and shapes the material frame that has just arrived at the discharge area, aligns it with the existing material frame, and the lifting mechanism in the discharge area puts down the lifted existing material frame and stacks it on the material frame that has just been shaped. The lifting structure descends to the bottom layer to clamp the material frame and lift it. At this time, when the bottom material frame detaches from the detection sensor and detects that the discharge material frame push-pull mechanism is empty, the discharge material frame push-pull mechanism is reset to the second working area;

[0021] Step f, repeat steps b to e. The feed cart can be evacuated after the first lifting in the feed area. When the empty material frame is used up, the fully loaded feed cart is replenished. When the material frame in the discharge area reaches the maximum stacking height, the lifting mechanism in the discharge area places the material frame on the discharge cart and pushes it away. The discharge cart is replenished before the maximum stacking height is reached next time.

[0022] The material frame bottom layer of the feeding area of ​​the present invention discharges materials, and the material frames in the discharging area are stacked one by one from the bottom. The lifting amplitude is small, the lifting amount is consistent each time, the controllability is better, and long-term stable operation can be achieved. The present invention adopts a lifting mechanism support, the trolley is more free, and the demand for the number of trolleys is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of a material frame of the present invention.

[0025] Figure 2 It is a schematic diagram of the overall structure without a material frame of the present invention.

[0026] Figure 3 It is a schematic diagram of a positioning mechanism of a feeding area trolley of the present invention.

[0027] Figure 4 It is a schematic diagram of a secondary positioning mechanism of a material frame in a discharging area of ​​the present invention.

[0028] Figure 5 It is a schematic diagram of a material frame lifting mechanism of the present invention.

[0029] Figure 6 It is a schematic diagram of the structure of a first working area of ​​the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of a second working area of ​​the present invention.

[0031] In the figure: 1. feeding area, 2. first working area, 3. second working area, 4. discharging area, 5. material frame lifting mechanism, 6. feeding material frame push-pull mechanism, 7. discharging material frame push-pull mechanism, 8. conveying roller, 9. first side positioning cylinder, 10. second side positioning cylinder, 11. front positioning plate, 13. telescopic top plate, 14. telescopic baffle, 15. lifting slider, 16. lifting plate, 17. bottom material frame detachment detection sensor, 18. feeding push-pull cylinder, 19. feeding push-pull support plate, 20. feeding push-pull cross bar, 21. discharging push-pull cylinder, 22. discharging push-pull support plate, 23. discharging push-pull cross bar, 24. material frame in place detection sensor, 25. material frame shaping paddle. DETAILED DESCRIPTION

[0032] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0033] Embodiment: A material frame palletizer, such as Figure 1 , 2 As shown. The device is arranged in a U shape, and the material frame is transported from one end of the U-shaped body to the other end. The body includes a feeding area 1, a first working area 2, a second working area 3, and a discharging area 4 in sequence along the material frame conveying direction. The feeding area 1 and the discharging area 4 are provided with a cart positioning mechanism and a material frame lifting mechanism 5, a feeding material frame push-pull mechanism 6 is provided between the feeding area 1 and the first working area 2, and a plurality of transfer rollers composed of conveying rollers 8 are provided between the first working area 2 and the second working area 3. The conveying rollers are rubber rollers, and there are gaps between adjacent conveying rollers. The second working area 3 is provided with a material frame positioning and shaping mechanism, a discharging material frame push-pull mechanism 7 is provided between the second working area and the discharging area, and the discharging area is also provided with a secondary material frame positioning mechanism.

[0034] like Figure 3As shown, the trolley positioning mechanism in the feed area includes a front positioning plate 11 fixedly arranged at the front end of the positioning trolley and side positioning cylinders on both sides of the positioning trolley, the side positioning cylinders include two first side positioning cylinders 9 and two second side positioning cylinders 10, the two first side positioning cylinders 9 are symmetrically arranged on both sides of the rear end of the trolley, and are clamped and positioned by pushing out; the two second side positioning cylinders 10 are symmetrically arranged on both sides of the front end of the trolley, and are clamped and positioned by tensioning.

[0035] like Figure 4 As shown, the trolley positioning mechanism of the discharge area 4 is consistent with that of the feed area 1. The discharge area is also provided with a secondary positioning mechanism for the material frame, which includes a telescopic top plate 13 for positioning the side of the material frame and a telescopic baffle 14 for positioning the end face of the material frame. The telescopic top plate 13 and the telescopic baffle 14 are both symmetrically arranged and driven by a cylinder. A total of four telescopic top plates 13 are arranged, corresponding to the front and rear ends of the two sides of the material frame, and two telescopic baffles 14 are arranged, corresponding to the left and right sides of the front face of the material frame. Among them, the telescopic top plate 13 can also be arranged in the feed area to position the feed material frame in the left and right directions for easy lifting.

[0036] Material frame lifting mechanism Figure 2 , 5 As shown, Figure 5 for Figure 2 The partial screenshot shows that the material frame lifting mechanism 5 is symmetrically arranged on the left and right sides of the feeding area 1, and the material frame lifting mechanism 5 is symmetrically arranged on the left and right sides of the discharging area 4. The material frame lifting mechanism 5 includes a lifting slider 15 that slides up and down, and the lifting slider is an inverted U-shape. The lower ends of the lifting sliders are provided with inwardly retractable lifting plates 16 at the same height. The lower surface of the lifting plate 16 is a guiding inclined surface that tilts upward from the outside to the inside, and the upper surface of the lifting plate is a plane. The material frame lifting mechanism also includes a bottom material frame detachment detection sensor 17, which is arranged between the two lifting plates 16, and the lowest position of the lifting plate is lower than the position of the material frame detachment detection sensor.

[0037] The first work area is Figure 2 , 6 As shown, Figure 6 for Figure 2A partial cut-out of the diagram shows that a feed push-pull cylinder 18 is provided between the sides of the feed area 1 and the first working area 2. The feed push-pull cylinder is linked to a feed push-pull support plate 19. A feed push-pull cross bar 20 is provided at one end of the feed push-pull support plate facing the feed area. The feed push-pull support plate is provided at the gap between the conveying rollers and the feed push-pull support plate is lower than the upper surface of the conveying rollers. The feed push-pull cross bar is perpendicular to the conveying rollers and higher than the upper surface of the conveying rollers. The feed push-pull support plate 19 supports the bottom surface of the material frame. Two feed push-pull support plates are provided, which are respectively provided between different gaps between conveying rollers. The feed push-pull cross bar 20 is erected between the two feed push-pull push plates 19. A guide slope is provided at the end of the conveying roller to ensure that the material frame can rise from the feed push-pull support plate to the surface of the conveying roller during the pushing process. The feed push-pull cross bar is the main force-applying component for pushing and pulling the material frame.

[0038] The second work area is Figure 7 As shown, a discharging push-pull cylinder 21 is provided between the second working area 3 and the discharging area 4 and the side thereof, and the discharging push-pull cylinder is linked with a discharging push-pull support plate 22, and a discharging push-pull cross bar 23 is provided at one end of the discharging push-pull support plate away from the discharging area, and the discharging push-pull support plate is provided at the gap between the conveying rollers and the discharging push-pull support plate is lower than the upper surface of the conveying rollers, and the discharging push-pull cross bar 23 is perpendicular to the conveying rollers and higher than the upper surface of the conveying rollers. Two discharging push-pull support plates 22 are provided, and the discharging push-pull cross bar 23 is erected between the ends of the two discharging push-pull support plates 22.

[0039] like Figure 7 As shown, the second working area is also provided with a material frame positioning and shaping mechanism, which includes a material frame in-place detection sensor 24 and a material frame shaping paddle 25 that can move forward and backward to adjust the position of the material frame. The material frame in-place detection sensor is set at the end of the conveying roller in the second working area, and the material frame shaping paddle is set on the side of the second working area away from the discharging area. The material frame shaping paddle is set at the gap between the conveying rollers and the upper end of the material frame shaping paddle is higher than the upper surface of the conveying roller and lower than the discharging push-pull cross bar 23. The material frame shaping paddle is U-shaped and has a certain width for easy shaping. The material frame shaping paddle is lower than the discharging push-pull cross bar to avoid interference. Two material frame in-place detection sensors are set, and the spacing between the two material frame in-place detection sensors does not exceed the width of the material frame to ensure that both ends of the material frame are in place and not skewed.

[0040] A method for using a material frame palletizer, using the material frame palletizer, comprises the following steps:

[0041] Step a, placing a feeding cart with an empty material frame in the feeding area, and placing an empty discharging cart in the discharging area;

[0042] Step b, the material frame lifting mechanism in the feeding area clamps the bottom material frame and lifts all the empty material frames, the feeding material frame push-pull mechanism runs to the bottom of the bottom material frame, the lifting mechanism puts down all the empty material frames, and then rises one grid to clamp the second-to-last material frame and lift it up, when the bottom material frame detachment detection sensor detects that it is empty above the bottom material frame, it is considered that the bottom material frame has been detached, and at this time, the feeding material frame push-pull mechanism pushes and pulls the bottom material frame to the first working area;

[0043] Step c, the bottom material frame is transported to the second working area by the conveying roller, the material frame positioning and shaping mechanism adjusts the posture by the material frame shaping paddle, the material frame in place detection sensor detects whether the bottom material frame is in place, and after it is in place, the material is filled into the bottom material frame to form a material loading frame;

[0044] Step d, the lifting mechanism of the discharge area lifts the existing material loading frame in the discharge area, the lifting height is not less than the height of a single material frame, and the discharge frame push-pull mechanism pushes and pulls the material loading frame in the second working area to the discharge area;

[0045] Step e, the material frame secondary positioning mechanism secondary positions and shapes the material frame that has just arrived at the discharge area, aligns it with the existing material frame, and the lifting mechanism in the discharge area puts down the lifted existing material frame and stacks it on the material frame that has just been shaped. The lifting structure descends to the bottom layer to clamp the material frame and lift it. At this time, when the bottom material frame detaches from the detection sensor and detects that the discharge material frame push-pull mechanism is empty, the discharge material frame push-pull mechanism is reset to the second working area;

[0046] Step f, repeat steps b to e. The feed cart can be evacuated after the first lifting in the feed area. When the empty material frame is used up, the fully loaded feed cart is replenished. When the material frame in the discharge area reaches the maximum stacking height, the lifting mechanism in the discharge area places the material frame on the discharge cart and pushes it away. The discharge cart is replenished before the maximum stacking height is reached next time.

Claims

1. A material frame palletizer, characterized in that: The material frame palletizer is arranged in a U shape, and the material frame is transported from one end of the U-shaped body to the other end, and includes a feeding area, a first working area, a second working area, and a discharging area in sequence. The feeding area and the discharging area are provided with a cart positioning mechanism and a material frame lifting mechanism. A feeding material frame push-pull mechanism is provided between the feeding area and the first working area. A plurality of transfer rollers composed of conveying rollers are provided between the first working area and the second working area. A material frame positioning and shaping mechanism is provided in the second working area. A discharging material frame push-pull mechanism is provided between the second working area and the discharging area. The discharging area is also provided with a material frame secondary positioning mechanism. The left and right sides of the feeding area and the left and right sides of the discharging area are symmetrically provided with material frame lifting mechanisms, the material frame lifting mechanism includes a lifting slider that slides up and down, and a lifting plate for lifting the material frame laterally is provided inwardly of the lifting slider, and the material frame lifting mechanism also includes a bottom material frame detachment detection sensor; when the bottom material frame detachment detection sensor in the feeding area detects that the top of the bottom material frame is empty, it is deemed that the bottom material frame has completed detachment, ensuring that the feeding push-pull mechanism takes away one material frame at a time, at this time, the feeding material frame push-pull mechanism pushes and pulls the bottom material frame to the first working area; the bottom material frame detachment detection sensor in the discharging area detects that the top of the discharging material frame push-pull mechanism is empty, ensuring that the lifting is successful, avoiding the discharging material frame push-pull mechanism from bringing the material frame back to the second working area, and the discharging material frame push-pull mechanism is reset to the second working area; The feed trolley can be evacuated after the first lifting in the feed area, and the fully loaded feed trolley will be replenished when the empty material frames are used up. When the material frames in the discharging area reach the maximum stacking height, the material frame lifting mechanism in the discharging area places the material frames on the discharging trolley and pushes them away, and the discharging trolley will be replenished before the maximum stacking height is reached next time; when the feed trolley is replenished with material for the second time, there are still two material frames of the first feeding rotating in the first working area and the second working area, that is, the discharging area is still two material frames away from being fully loaded, and the feed trolley and the discharging trolley use one trolley to realize feeding and discharging.

2. A material frame palletizer according to claim 1, characterized in that: The cart positioning mechanism includes a front positioning plate for positioning the front end of the cart and side positioning cylinders for positioning both sides of the cart, the side positioning cylinders include two first side positioning cylinders and two second side positioning cylinders, the two first side positioning cylinders are symmetrically arranged on both sides of the rear end of the cart, and the two second side positioning cylinders are symmetrically arranged on both sides of the front end of the cart.

3. A material frame palletizer according to claim 1, characterized in that: The lifting slider is an inverted U-shape, and lifting plates are arranged at the same height on both sides of the lower end of the lifting slider. The bottom material frame detachment detection sensor is arranged between the two lifting plates, and the lowest position of the lifting plate is lower than the position of the bottom material frame detachment detection sensor.

4. A material frame palletizer according to claim 1, characterized in that: The lifting plate is a telescopic structure or a folding structure that can be flipped upwards, the lower surface of the lifting plate is a guiding inclined surface that tilts upward from the outside to the inside, and the upper surface of the lifting plate is a plane or an inclined surface that tilts inwards.

5. The material frame palletizer according to claim 1, characterized in that: A feed push-pull cylinder is provided between the sides of the feed area and the first working area, and a feed push-pull support plate is provided in linkage with the feed push-pull cylinder. A feed push-pull cross bar is provided at one end of the feed push-pull support plate facing the feed area, and the feed push-pull support plate is provided in the gap between the conveying rollers and the feed push-pull support plate is lower than the upper surface of the conveying roller, and the feed push-pull cross bar is perpendicular to the conveying roller and higher than the upper surface of the conveying roller.

6. A material frame palletizer according to claim 1, characterized in that: A discharging push-pull cylinder is provided between the second working area and the side of the discharging area, and a discharging push-pull support plate is provided in linkage with the discharging push-pull cylinder. A discharging push-pull cross bar is provided at the end of the discharging push-pull support plate away from the discharging area. The discharging push-pull support plate is arranged in the gap between the conveying rollers and the discharging push-pull support plate is lower than the upper surface of the conveying roller, and the discharging push-pull cross bar is perpendicular to the conveying roller and higher than the upper surface of the conveying roller.

7. The material frame palletizer according to claim 1, characterized in that: The material frame positioning and shaping mechanism includes a material frame in-place detection sensor and a material frame shaping paddle that can move forward and backward to adjust the position of the material frame. The material frame in-place detection sensor is arranged at the end of the conveying roller in the second working area, the material frame shaping paddle is arranged on a side of the second working area away from the discharge area, the material frame shaping paddle is arranged in the gap between the conveying rollers and the upper end of the material frame shaping paddle is higher than the upper surface of the conveying roller.

8. The material frame palletizer according to claim 1, characterized in that: The material frame secondary positioning mechanism comprises a telescopic top plate for positioning the side surface of the material frame and a telescopic baffle for positioning the end surface of the material frame. The telescopic top plate and the telescopic baffle are both arranged symmetrically on the left and right.

9. A method for using a material frame palletizer, using the material frame palletizer as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step a, placing a feed cart carrying an empty feed frame in a feed area; Step b, the material frame lifting mechanism in the feeding area clamps the bottom material frame and lifts all the empty material frames, the feeding material frame push-pull mechanism runs to the bottom of the bottom material frame, the material frame lifting mechanism puts down all the empty material frames, and then rises one grid to clamp the second-to-last material frame and lift it up, when the bottom material frame detachment detection sensor detects that it is empty above the bottom material frame, it is considered that the bottom material frame has been detached, and at this time, the feeding material frame push-pull mechanism pushes and pulls the bottom material frame to the first working area; Step c, the bottom material frame is transported to the second working area by the conveying roller, the material frame positioning and shaping mechanism adjusts the posture by the material frame shaping paddle, the material frame in place detection sensor detects whether the bottom material frame is in place, and after it is in place, the material is filled into the bottom material frame to form a material loading frame; Step d, the material frame lifting mechanism of the material discharging area lifts the existing material loading frame in the material discharging area, the lifting height is not less than the height of a single material frame, and the material discharging frame push-pull mechanism pushes and pulls the material loading frame of the second working area to the material discharging area; Step e, the material frame secondary positioning mechanism secondary positions and shapes the material frame that has just arrived at the discharge area, aligns it up and down with the existing material frame, and the material frame lifting mechanism in the discharge area puts down the lifted existing material frame and stacks it on the material frame that has just been shaped, and the lifting structure descends to the bottom layer to clamp the material frame and lift it. At this time, when the bottom material frame detaches from the detection sensor and detects that the material frame push-pull mechanism is empty, the material frame push-pull mechanism is reset to the second working area; Step f, repeating steps b to e, the feed cart can be evacuated after the first lifting in the feed area, and the fully loaded feed cart is replenished when the empty material frame is used up, and when the material frame in the discharge area reaches the maximum stacking height, the material frame lifting mechanism in the discharge area places the material frame on the discharge cart and pushes it away, and the discharge cart is replenished before the maximum stacking height is reached next time; When the feed trolley replenishes the material for the second time, two material frames of the first feeding still rotate in the first working area and the second working area, that is, the discharging area is still two material frames away from being fully loaded, and the feed trolley and the discharging trolley use one trolley to realize feeding and discharging.

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