A one-stop production line for cutting and conveying metal sheets

Abstract

The present invention discloses a one-stop production line for cutting and conveying metal sheets, including a material preparation platform, a lifting platform, a first longitudinal feeding device, and a second longitudinal feeding device. A first transverse feeding device and a second transverse feeding device are arranged between the first longitudinal feeding device and the second longitudinal feeding device. The first longitudinal feeding device is provided with a material taking mechanism at one end connected to the lifting platform, and the first longitudinal feeding device is provided with a cutting mechanism at the other end connected to the first transverse feeding device; one end of the second transverse feeding device is connected to the first transverse feeding device, and the other end of the second transverse feeding device is connected to one end of the second longitudinal feeding device. The present invention can realize automatic slitting of metal sheets and conveying the slitting metal sheets to a rounding machine, and can be applied to slitting metal sheets of different sizes and conveying them after slitting, and has wide versatility.

Description

Technical Field

[0001] The present invention relates to the technical field related to metal sheet processing, and in particular to a one-stop production line for cutting and conveying metal sheets. Background Art

[0002] Before making metal cans, the metal sheets need to be cut into several small pieces that meet the specifications of the metal cans to be made, and then the cut small pieces of metal sheets are fed into a round forming machine for can making. At present, the above process steps are mainly carried out by manual operation to cut metal sheets and deliver them to the round forming machine, and the production efficiency needs to be improved. With the upgrading of the industry and the advancement of technology, we have proposed a one-stop production line for cutting and conveying metal sheets, which has the functions of cutting metal sheets and conveying the cut metal sheets to the round forming machine. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a one-stop production line for cutting and conveying metal sheets.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a one-stop production line for cutting and conveying metal sheets, comprising a material preparation table, a material lifting table, and a first longitudinal feeding device and a second longitudinal feeding device for conveying sheets along the Y-axis direction, the material lifting table is arranged between the material preparation table and the first longitudinal feeding device, and a first transverse feeding device and a second transverse feeding device for conveying sheets along the X-axis direction are arranged between the first longitudinal feeding device and the second longitudinal feeding device,

[0005] The first longitudinal feeding device is provided with a material taking mechanism at one end opposite to the lifting platform, and the material taking mechanism takes the sheet material at the lifting platform and places it to the first longitudinal feeding device. The first longitudinal feeding device is provided with a cutting mechanism at the other end opposite to the first transverse feeding device, and the first longitudinal feeding device conveys the sheet material cut by the cutting mechanism to the first transverse feeding device.

[0006] A first suction rack is provided above the first transverse feeding device, and a first material beating mechanism is provided at the first suction rack. The first suction rack absorbs the cut sheets, and the first material beating mechanism knocks the sheets at the first suction rack down to the first transverse feeding device.

[0007] One end of the second transverse feeding device is connected to the first transverse feeding device, and the other end of the second transverse feeding device is connected to one end of the second longitudinal feeding device. A second suction rack is provided above the second longitudinal feeding device, and a second material beating mechanism is provided at the second suction rack. The second material beating mechanism knocks the sheet material at the second suction rack down to the second longitudinal feeding device, and the other end of the second longitudinal feeding device is connected to the round forming machine.

[0008] To further explain, the material picking mechanism includes a bracket, a deflection rod, a transverse mounting seat, a first driving cylinder, and a plurality of material picking cylinders. The bracket is arranged above the lifting platform, the deflection rod is rotatably arranged at the bracket, a rocker arm is connected to the telescopic rod of the first driving cylinder, and the rocker arm is connected to the deflection rod. The transverse mounting seat is fixedly installed at the deflection rod, and a plurality of material picking cylinders are fixedly installed at the transverse mounting seat. Suction cups are installed at the telescopic rods of the material picking cylinders.

[0009] To further explain, the first longitudinal feeding device is provided with a pallet component, a transverse frame is provided under the pallet component, a plurality of transverse grooves are opened on the pallet component, a plurality of support blocks are provided at equal intervals on the transverse grooves, the support blocks are installed on the transverse frame, and the number of the support blocks at each transverse groove is the same, a plurality of guide plate groups are provided above the pallet component, the guide plate groups and the transverse grooves are arranged perpendicular to each other, a first conveying chain is provided between two adjacent guide plate groups, a first hook is provided on the first conveying chain for driving the sheet to translate along the Y-axis direction, and the guide plate group is fixedly installed on the support block component.

[0010] It is further explained that the guide plate group includes a guide plate member, a guide plate member is provided on the left and right sides of the support block member, a support rod member is provided under each guide plate member, the support rod member is snapped into the support block member, the guide plate member is fixedly installed on the support block member, and a plurality of first rollers are installed on the guide plate member.

[0011] It is further explained that the structure of the second transverse feeding device is the same as the structure of the first longitudinal feeding device.

[0012] To further explain, the cutting mechanism is arranged at one end of the pallet member, a hinge shaft is arranged at the other end of the pallet member, and a lifting cylinder for lifting one end of the pallet member is arranged below the pallet member.

[0013] It is further explained that the first suction rack includes a plurality of beam components, and each of the beam components is provided with a magnet for absorbing the cut sheets.

[0014] It is further explained that the first material beating mechanism includes a second driving cylinder, an active push rod, a driven push rod, and a material beating piece. The telescopic rod of the second driving cylinder is hinged to the active push rod, and the active push rod and the driven push rod are both hinged to the first suction rack. The material beating piece is hinged to the active push rod and the driven push rod. The second driving cylinder drives the material beating piece through the active push rod, and the material beating piece knocks the sheet material at the first suction rack down to the first horizontal feeding device.

[0015] It is further explained that the structure of the second material suction rack is the same as that of the first material suction rack, and the structure of the second material beating mechanism is the same as that of the first material beating mechanism.

[0016] It is further explained that the second longitudinal feeding device is provided with an intermediate pallet, and second conveying chains are respectively provided on the left and right sides of the intermediate pallet. The second conveying chain is provided with a second hook for driving the sheet to translate along the Y-axis direction, and a second roller is provided between the second conveying chain and the intermediate pallet.

[0017] The beneficial effects of the present invention are as follows: the present invention adopts a one-stop production line design, which can not only realize automatic slitting of metal sheets and conveying the slitting metal sheets to a rounding machine, but also can be applied to slitting metal sheets of different sizes and conveying them after slitting, thus having wide versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the lifting platform.

[0020] Figure 3 It is a structural diagram of the material taking mechanism.

[0021] Figure 4 It is a schematic structural diagram of the first longitudinal feeding device.

[0022] Figure 5 It is a side view of the first longitudinal feeding device.

[0023] Figure 6 It is a structural diagram of the cutting mechanism.

[0024] Figure 7 It is a schematic structural diagram of the first transverse feeding device.

[0025] Figure 8 It is a schematic diagram of the first transverse feeding device when knocking down the sheet material.

[0026] Fig. 9This is a schematic diagram of the structure when the second longitudinal feeding device conveys sheet material to the round forming machine.

[0027] Figure Number:

[0028] 11. Material preparation platform; 12. Material lifting platform; 121. Lifting machine; 122. Conveying roller; 20. Material taking mechanism; 21. Bracket; 22. Deflection rod; 23. Transverse mounting seat; 24. First driving cylinder; 25. Material taking cylinder; 26. Rocker arm; 27. Suction cup;

[0029] 30. first longitudinal feeding device; 31. tray member; 311. transverse channel; 32. transverse frame; 33. support block member; 34. first conveying chain; 341. first hook finger; 35. guide plate member; 36. support rod member; 37. first roller; 38. articulated shaft; 39. lifting cylinder;

[0030] 40, cutting mechanism; 41, roller cutter shaft; 42, roller cutter; 50, first transverse feeding device; 51, first suction rack; 511, beam component; 52, first material beating mechanism; 521, second driving cylinder; 522, active push rod component; 523, driven push rod component; 524, material beating component;

[0031] 60. Second transverse feeding device; 70. Second longitudinal feeding device; 71. Second suction rack; 72. Second material beating mechanism; 73. Intermediate support plate; 74. Second conveying chain; 741. Second hook finger; 75. Second roller; 80. Rounding machine; 90. Sheet material; 91. Material stack. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Combined with Figure 1 As shown, a one-stop production line for cutting and conveying metal sheets includes a material preparation table 11, a lifting table 12, and a first longitudinal feeding device 30 and a second longitudinal feeding device 70 for conveying sheets along the Y-axis direction. The lifting table 12 is arranged between the material preparation table 11 and the first longitudinal feeding device 30. A first transverse feeding device 50 and a second transverse feeding device 60 for conveying sheets along the X-axis direction are arranged between the first longitudinal feeding device 30 and the second longitudinal feeding device 70.

[0034] The material preparation platform 11 conveys the metal sheet material stack to the lifting platform 12. Figure 2As shown, the lifting platform 12 specifically adopts a structural design combining an elevator 121 and a conveying roller 122. The material stack 91 is transported from the material preparation platform 11 to the conveying roller 122 of the lifting platform 12, and the elevator 121 lifts the material stack. The first longitudinal feeding device 30 is provided with a material taking mechanism 20 at one end opposite to the lifting platform 12. The material taking mechanism 20 takes and places the sheet material at the lifting platform 12 to the first longitudinal feeding device 30. As the metal sheet material is continuously taken and placed to the first longitudinal feeding device 30, the lifting platform 12 continuously lifts the material stack.

[0035] The first longitudinal feeding device 30 is provided with a cutting mechanism 40 at the other end opposite to the first transverse feeding device 50. The cutting mechanism 40 is specifically used to evenly cut the metal sheet and cut off the excess material on both sides of the metal sheet. Figure 6 As shown, a cutting mechanism 40 is provided with a rolling cutter shaft 41, and a plurality of rolling cutters 42 are fixedly installed on the rolling cutter shaft 41 and are distributed at equal intervals. The rolling cutters 42 located on the far left and far right are used to cut off the excess material on both sides of the metal sheet 90 to ensure that the width of the cut metal sheet is consistent. In addition, the installation position and spacing of the rolling cutters 42 on the rolling cutter shaft 41 can be freely set according to the target width of the metal sheet to be cut.

[0036] The first longitudinal feeding device 30 conveys the sheets cut by the cutting mechanism 40 to the first transverse feeding device 50;

[0037] A first suction rack 51 is provided above the first transverse feeding device 50, and a first material beating mechanism 52 is provided at the first suction rack 51. The first suction rack 51 absorbs the cut sheets, and the first material beating mechanism 52 knocks the sheets at the first suction rack 51 down to the first transverse feeding device 50, thereby realizing the transfer of the sheets between the first longitudinal feeding device 30 and the first transverse feeding device 50;

[0038] One end of the second transverse feeding device 60 is connected to the first transverse feeding device 50, and the other end of the second transverse feeding device 60 is connected to one end of the second longitudinal feeding device 70. A second suction frame 71 is provided above the second longitudinal feeding device 70, and a second material beating mechanism 72 is provided at the second suction frame 71. The second material beating mechanism 72 knocks the sheet material at the second suction frame 71 down to the second longitudinal feeding device 70. The other end of the second longitudinal feeding device 70 is connected to the rounding machine 80.

[0039] Combined with Figure 1 and attached Figure 3As shown, the material taking mechanism 20 includes a bracket 21, a deflection rod 22, a transverse mounting seat 23, a first driving cylinder 24, and a plurality of material taking cylinders 25. The bracket 21 is arranged above the lifting platform 12, the deflection rod 22 is rotatably arranged at the bracket 21, a rocker arm 26 is connected to the telescopic rod of the first driving cylinder 24, and the rocker arm 26 is connected to the deflection rod 22. The transverse mounting seat 23 is fixedly installed at the deflection rod 22, and a plurality of material taking cylinders 25 are fixedly installed at the transverse mounting seat 23. Suction cups 27 are installed at the telescopic rods of the material taking cylinders 25. When taking materials, the first driving cylinder 24 drives the deflection rod 22 to rotate through the rocker arm 26, and the deflection rod 22 drives the first driving cylinder 24 installed at the transverse mounting seat 23 to deflect, and the suction cup 27 at the material taking cylinder 25 sucks a single metal sheet 90 from the material stack 91 of the lifting platform 12. The spacing between the material taking cylinders 25 at the transverse mounting seat 23 can be freely set according to the target width size of the metal sheet to be cut.

[0040] Combined with Figure 1 , Attachment Figure 4 and attached Figure 5 As shown, the first longitudinal feeding device 30 is provided with a pallet member 31, and a transverse frame 32 is provided below the pallet member 31. A hand wheel for adjusting the transverse relative position between the transverse frame 32 and the pallet member 31 is specifically provided at the transverse frame 32, so as to facilitate the adjustment and alignment between the first longitudinal feeding device 30 and the material taking mechanism 20. A plurality of transverse grooves 311 are provided at the pallet member 31, and a plurality of support blocks 33 arranged at equal intervals are provided at the transverse grooves 311. The support blocks 33 are installed at the transverse frame 32, and the number of support blocks 33 at each transverse groove 311 is the same; when the transverse relative position between the transverse frame 32 and the pallet member 31 is adjusted, the support blocks 33 slide along the transverse grooves 311 simultaneously with the transverse frame 32;

[0041] Specifically, a plurality of guide plate groups are arranged above the tray member 31, and the guide plate groups and the transverse groove 311 are arranged perpendicular to each other. A first conveying chain 34 is arranged between two adjacent guide plate groups, and a first hook 341 is arranged at the first conveying chain 34 for driving the sheet to translate along the Y-axis direction. The guide plate group is fixedly installed at the bracket member 33. Figure 4 As shown, when the first conveying chain 34 is running, the first hook 341 at the first conveying chain 34 pushes the metal sheet 90 to slide along the Y-axis direction.

[0042] As attached Figure 4As shown, the guide plate assembly includes a guide plate member 35, a guide plate member 35 is provided on both sides of the support block member 33, a support rod member 36 is provided below each guide plate member 35, the support rod member 36 is buckled at the support block member 33, the guide plate member 35 is fixedly installed at the support block member 33, and a plurality of first rollers 37 are installed at the guide plate member 35. The cross section of the guide plate member 35 is specifically L-shaped, and the first rollers 37 are specifically installed on the side of the guide plate member 35, and the metal sheet can slide under the rolling action of the first rollers 37.

[0043] Combined with Figure 1 , Attachment Figure 5 and attached Figure 6 As shown, the cutting mechanism 40 is arranged at one end of the pallet member 31, the other end of the pallet member 31 is provided with a hinge shaft 38, and a lifting cylinder 39 for lifting one end of the pallet member 31 is arranged below the pallet member 31. Since the cutting mechanism 40 is provided with a rolling cutter 42, when the rolling cutter 42 needs to be polished, the lifting cylinder 39 can directly lift one end of the pallet member 31, and the pallet member 31 deflects upward around the hinge shaft 38, so that the staff can polish the rolling cutter 42 of the cutting mechanism 40 conveniently.

[0044] Combined with Figure 1 and attached Figure 7 As shown, the first material suction frame 51 includes a plurality of beam components 511, and each beam component 511 is provided with a magnet for adsorbing the cut sheet 90 (Note: not shown in the drawings). The first material beating mechanism 52 is arranged at the first material suction frame 51. The first material beating mechanism 52 includes a second driving cylinder 521, an active push rod 522, a driven push rod 523, and a material beating member 524. The telescopic rod of the second driving cylinder 521 is hinged to the active push rod 522, and the active push rod 522 and the driven push rod 523 are both hinged to the first material suction frame 51, and the material beating member 524 is both hinged to the active push rod 522 and the driven push rod 523;

[0045] The second driving cylinder 521 of the first material beating mechanism 52 is specifically installed at the beam component 511 of the first material suction frame 51. Both sides of each beam component 511 are provided with an active push rod 522, a driven push rod 523, and a material beating component 524. The second driving cylinder 521 can drive the active push rods 522 on both sides of the beam component 511 at the same time.

[0046] Combined with Figure 7 and attached Figure 8As shown, the second driving cylinder 521 drives the material-beating member 524 through the active push rod member 522, and the material-beating member 524 knocks the sheet material 90 at the first suction rack 51 to the first transverse feeding device 50. The first transverse feeding device 50 then delivers the sheet material to the second transverse feeding device 60. The structure of the second transverse feeding device 60 is the same as that of the first longitudinal feeding device 30. The second transverse feeding device 60 transports the sheet material along the X-axis direction and delivers the sheet material to the second longitudinal feeding device 70.

[0047] The second suction rack 71 is specifically arranged at the second longitudinal feeding device 70. The structure of the second suction rack 71 is the same as that of the first suction rack 51. The second material beating mechanism 72 is arranged at the second suction rack 71. The second suction rack 71 is also provided with a magnet for adsorbing sheets (note: not shown in the drawings). When the second transverse feeding device 60 delivers sheets to the second longitudinal feeding device 70, the second suction rack 71 absorbs the sheets delivered by the second transverse feeding device 60, and then the second material beating mechanism 72 knocks the sheets at the second suction rack 71 down to the second longitudinal feeding device 70.

[0048] Combined with Figure 1 and attached Fig. 9 As shown, the structure of the second material beating mechanism 72 is the same as that of the first material beating mechanism 52. The second material beating mechanism 72 knocks the sheet material at the second suction rack 71 to the second longitudinal feeding device 70, thereby realizing the transfer of the sheet material between the second transverse feeding device 60 and the second longitudinal feeding device 70.

[0049] As attached Fig. 9 As shown, the second longitudinal feeding device 70 is provided with an intermediate support plate 73, and the left and right sides of the intermediate support plate 73 are respectively provided with second conveying chains 74, and the second conveying chain 74 is provided with a second hook 741 for driving the sheet material to translate along the Y-axis direction, and a second roller 75 is provided between the second conveying chain 74 and the intermediate support plate 73. When the second longitudinal feeding device 70 conveys the sheet material to the rounding machine 80, the second roller 75 holds the sheet material 90, the second conveying chain 74 runs, and the second hook 741 at the second conveying chain 74 pushes the sheet material 90 to the rounding machine 80. After the rounding machine 80 receives the cut metal sheet material, it can make cans.

[0050] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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, and therefore cannot be understood as a limitation on the present invention.

[0051] It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0052] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A one-stop production line for cutting and conveying metal sheets, characterized in that: The invention comprises a material preparation platform (11), a material lifting platform (12), and a first longitudinal feeding device (30) and a second longitudinal feeding device (70) for conveying sheet materials along the Y-axis direction. The material lifting platform (12) is arranged between the material preparation platform (11) and the first longitudinal feeding device (30). A first transverse feeding device (50) and a second transverse feeding device (60) for conveying sheet materials along the X-axis direction are arranged between the first longitudinal feeding device (30) and the second longitudinal feeding device (70). The first longitudinal feeding device (30) is provided with a material taking mechanism (20) at one end connected to the lifting platform (12), and the material taking mechanism (20) takes the sheet material on the lifting platform (12) and places it on the first longitudinal feeding device (30). The first longitudinal feeding device (30) is provided with a cutting mechanism (40) at the other end connected to the first transverse feeding device (50), and the first longitudinal feeding device (30) conveys the sheet material cut by the cutting mechanism (40) to the first transverse feeding device (50); A first material suction frame (51) is provided above the first transverse material feeding device (50), and a first material beating mechanism (52) is provided at the first material suction frame (51). The first material suction frame (51) absorbs the cut sheets, and the first material beating mechanism (52) knocks the sheets at the first material suction frame (51) down to the first transverse material feeding device (50); One end of the second transverse feeding device (60) is connected to the first transverse feeding device (50), and the other end of the second transverse feeding device (60) is connected to one end of the second longitudinal feeding device (70). A second suction frame (71) is provided above the second longitudinal feeding device (70), and a second material beating mechanism (72) is provided at the second suction frame (71). The second material beating mechanism (72) knocks the sheet material at the second suction frame (71) down to the second longitudinal feeding device (70). The other end of the second longitudinal feeding device (70) is connected to the rounding machine (80); The first longitudinal feeding device (30) is provided with a pallet member (31), a transverse frame (32) is provided below the pallet member (31), a plurality of transverse grooves (311) are provided at the pallet member (31), a plurality of support blocks (33) are provided at the transverse grooves (311), the support blocks (33) are installed at the transverse frame (32), and the number of the support blocks (33) at each transverse groove (311) is the same; a plurality of guide plate groups are provided above the pallet member (31), the guide plate groups and the transverse grooves (311) are arranged perpendicular to each other, a first conveying chain (34) is provided between two adjacent guide plate groups, a first hook (341) is provided at the first conveying chain (34) for driving the sheet to translate along the Y-axis direction, and the guide plate group is fixedly installed at the support block (33).

2. The one-stop production line for cutting and conveying metal sheets according to claim 1, characterized in that: The material picking mechanism (20) comprises a bracket (21), a deflection rod (22), a transverse mounting seat (23), a first driving cylinder (24), and a plurality of material picking cylinders (25). The bracket (21) is arranged above the lifting platform (12). The deflection rod (22) is rotatably arranged at the bracket (21). A rocker arm (26) is connected to the telescopic rod of the first driving cylinder (24). The rocker arm (26) is connected to the deflection rod (22). The transverse mounting seat (23) is fixedly mounted on the deflection rod (22). The plurality of material picking cylinders (25) are fixedly mounted on the transverse mounting seat (23). Suction cups (27) are installed at the telescopic rods of the material picking cylinders (25).

3. The one-stop production line for cutting and conveying metal sheets according to claim 1, characterized in that: The guide plate assembly comprises a guide plate member (35), one guide plate member (35) is provided on each of the left and right sides of the support block member (33), a support rod member (36) is provided below each of the guide plate members (35), the support rod member (36) is snap-fitted to the support block member (33), the guide plate member (35) is fixedly mounted on the support block member (33), and a plurality of first rollers (37) are mounted on the guide plate member (35).

4. The one-stop production line for cutting and conveying metal sheets according to claim 3, characterized in that: The structure of the second transverse feeding device (60) is the same as the structure of the first longitudinal feeding device (30).

5. The one-stop production line for cutting and conveying metal sheets according to claim 3, characterized in that: The cutting mechanism (40) is arranged at one end of the pallet member (31), the other end of the pallet member (31) is provided with a hinge shaft (38), and a lifting cylinder (39) for lifting one end of the pallet member (31) is provided below the pallet member (31).

6. The one-stop production line for cutting and conveying metal sheets according to claim 1, characterized in that: The first material suction frame (51) comprises a plurality of beam components (511), each of the beam components (511) being provided with a magnet for absorbing the cut sheets.

7. The one-stop production line for cutting and conveying metal sheets according to claim 6, characterized in that: The first material beating mechanism (52) comprises a second driving cylinder (521), an active push rod (522), a driven push rod (523), and a material beating member (524); the telescopic rod of the second driving cylinder (521) is hinged to the active push rod (522); the active push rod (522) and the driven push rod (523) are both hinged to the first material suction frame (51); the material beating member (524) is both hinged to the active push rod (522) and the driven push rod (523); the second driving cylinder (521) drives the material beating member (524) via the active push rod (522); the material beating member (524) knocks the sheet material at the first material suction frame (51) down to the first transverse feeding device (50).

8. The one-stop production line for cutting and conveying metal sheets according to claim 7, characterized in that: The structure of the second material suction frame (71) is the same as that of the first material suction frame (51), and the structure of the second material beating mechanism (72) is the same as that of the first material beating mechanism (52).

9. The one-stop production line for cutting and conveying metal sheets according to claim 1, characterized in that: The second longitudinal feeding device (70) is provided with an intermediate support plate (73), and second conveying chains (74) are respectively provided on the left and right sides of the intermediate support plate (73). The second conveying chain (74) is provided with a second hook (741) for driving the sheet to translate along the Y-axis direction, and a second roller (75) is provided between the second conveying chain (74) and the intermediate support plate (73).

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