CN110253304B - An elevator door panel rolling production line - Google Patents

Abstract

The invention relates to a rolling production line for elevator door wall panels, which belongs to the technical field of elevator manufacturing. A rolling production line is composed of four sections of unpowered drum lines and an automatic rolling machine. Glue, sticking of reinforcing ribs, automatic rolling and pressing of reinforcing ribs by rolling machine in the middle, rivet-free connection of hall door and reinforcing ribs, pulling of car doors and reinforcing ribs on the last two unpowered roller lines The riveted connection, the pull riveted connection of the car wall and the reinforcing ribs, realizes the production of the whole process of the elevator door wall plate rolling, etc., improves the production efficiency, reduces the labor cost, and avoids the incoherence between the process and the process. Manual handling of the product results in damage to the surface of the parts. At the same time, the invention adds a universal ball table at the end of the whole process, and realizes the turning of the elevator door panel after rolling processing through the universal ball table, so that the product enters the next production process, and further avoids manual handling of the elevator door wall. plate.

Description

An elevator door panel rolling production line

technical field

The invention belongs to the technical field of elevator manufacturing, in particular to a rolling production line for elevator door wall panels.

Background technique

At present, in the production process of elevator door panels, the door panels of elevator door panels are glued and the reinforcing ribs are pasted manually. After the process of the link is completed, it is sent to the next process, which wastes time in transit and easily damages the surface of the parts. In addition, the reinforcing rib rolling is manually rolled, and the manual rolling cannot control the speed and strength of the rolling, which is easy to cause uneven pressing, or air is mixed in the glue, so that the connection between the reinforcing rib and the wall is not firm. The adhesion position is incorrect, resulting in the failure of the subsequent process. Production through this process will result in high work intensity, slow speed, and high defect rate, which cannot meet the existing production efficiency.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the background technology, the present invention provides an elevator door panel rolling production line, which is composed of an elevator door panel rolling production line by using four sections of unpowered roller lines and an automatic rolling machine to form an elevator door panel rolling production line. The first two sections of the unpowered drum line are glued and the reinforcing ribs are pasted. In the middle, the reinforcing ribs are automatically rolled and compacted by the rolling machine. Connection, pull riveting connection of car door and reinforcing rib, pull riveting connection of car wall and reinforcing rib, the whole process does not require manual handling, and at the same time realizes automatic rolling and pressing of reinforcing ribs, and realizes rolling of elevator door wall panels, etc. The production line of the whole process improves production efficiency, reduces labor costs, and avoids the inconsistency between processes and the need to manually transport products to cause surface damage of parts.

To achieve the above object, the present invention is achieved through the following technical solutions:

The elevator door panel rolling production line includes unpowered roller line I1, unpowered roller line II2, rolling machine 3, unpowered roller line III4, and unpowered roller line IV5. The power roller line II2 is installed side by side, the unpowered roller line III4 and the unpowered roller line IV5 are installed side by side, and the rolling machine 3 is installed between the power roller line II2 and the unpowered roller line III4.

Further, the unpowered drum line I1, the unpowered drum line II2, the unpowered drum line III4, and the unpowered drum line IV5 have the same structure, including a drum frame 7, a drum support 8, an unpowered drum 9, and a fluorescent lamp cover. 10. The hook carriage 11 and the air pipe 12, a roller bracket 8 is installed on the top of the front side of the roller frame 7, an unpowered roller 9 is installed on the roller bracket 8, and a fluorescent lamp is installed on the front side of the top of the roller frame 7 The cover 10 and the top of the drum frame 7 are provided with a hook carriage 11 and an air pipe 12 .

Further, the lower part of the drum frame 7 is provided with a storage layer 13 .

Further, the bottom of the drum frame 7 is provided with an adjusting foot cup 14 for supporting the entire drum frame 7 and adjusting the height of the drum frame 7 .

Further, the rolling machine 3 includes a frame 15 , a rolling device 16 , and a power roller device 17 . The power roller device 17 is installed on the frame 15 , and the frame 15 above the power roller device 17 is installed with a The bottom of the frame 15 is provided with an adjusting foot cup 14 opposite to the rolling device 16 .

Further, the power roller device 17 includes a roller mounting plate 18, a power roller 19, a deceleration motor 20, a sprocket transmission mechanism 21, and a cover plate 23. Two roller mounting plates 18 are installed in parallel on the frame 15, and the power roller 19 The bearings are neatly arranged on the two roller mounting plates 18 , the two adjacent power rollers 19 are connected by a sprocket mechanism, and one of the power rollers 19 is connected to the reduction motor 20 installed on the frame 15 through the sprocket transmission mechanism 21 . , a cover plate 23 for protecting the sprocket transmission mechanism 21 is installed on the frame 15 .

Further, the frame 15 is provided with a tensioning mechanism 22 for the transmission chain of the tensioning sprocket transmission mechanism 21. The tensioning mechanism 22 includes a tensioning seat 24, a tensioning wheel shaft 25, and a tensioning sprocket 26. The tensioning seat 24 is fixedly installed on the frame 15, the tensioning seat 24 is provided with a strip-shaped installation groove, the tensioning wheel shaft 25 is installed in the strip-shaped installation groove, and the tensioning sprocket 26 is installed on the tensioning wheel shaft through a bearing. 25, the tensioning sprocket 26 meshes with the transmission sprocket of the sprocket transmission mechanism 21.

The rolling device 16 includes an adjustment fixing plate 28, a mounting seat 29, a pneumatic pressing device 30, a transition connecting plate 31, a roller connecting rod 32, a hinge seat 33, a rolling roller 34, and an upper and lower adjusting platen 35; The adjustment fixing plate 28 is fixedly installed on the frame 15 through the mounting seat 29, the upper and lower adjustment pressing plates 35 are fixedly connected to the transition connecting plate 31, and a roller connecting rod 32 is respectively installed on both sides of the transition connecting plate 31 through fixing screws. The middle part of the rod 32 is hinged with the hinge seat 33 installed on the frame 15 through the pin shaft. The rollers 34 are in one-to-one correspondence and the pneumatic pressing device 30 realizes the pressing of the rolling rollers 34 .

Further, the pneumatic pressing device 30 includes a thin-walled cylinder 40, a cylinder connecting head 41, a cylinder connecting seat 42, a guide rod mounting plate 43, a cushion block 44, a pressing wheel fixing seat 45, a pressing wheel pin 46, a pressing wheel 47. Guide sleeve 48, guide rod 49, the thin-walled cylinder 40 is fixedly installed on the top of the adjustment fixing plate 28, a cylinder connecting head 41 is installed on the piston rod of the thin-walled cylinder 40, and the guide rod mounting plate 43 passes through the cylinder connecting seat 42 is installed at the bottom of the cylinder connector 41, the guide rod mounting plate 43 is provided with a guide rod 49, the guide rod 49 passes through the guide sleeve 48 fixed on the adjustment fixing plate 28, and the bottom of the guide rod mounting plate 43 is installed with a pad Block 44 , the pressing wheel fixing seat 45 is installed on the cushion block 44 , and the pressing wheel 47 is installed on the pressing wheel fixing seat 45 through the pressing wheel pin 46 .

Further, the rolling device 16 also includes an up-down adjustment mechanism 36, and the up-down adjustment mechanism 36 includes a T-shaped screw rod 37, a T-shaped nut 38, and a hand wheel 39. The T-shaped nut 38 is installed through the adjustment fixing plate 28, and the T The T-shaped screw rod 37 is installed in the T-shaped nut 38 , and the upper end of the T-shaped screw rod 37 is equipped with a hand wheel 39 .

Further, a universal ball table 6 is arranged on the rear side of the described unpowered roller line IV5, and the universal ball table 6 includes a bracket 50, a universal ball wheel 51, and a sealing plate 52, and the bottom of the bracket 50 is provided with an adjustment foot. The top of the cup 14 and the bracket 50 is a flat table surface, the table surface is evenly provided with grooves, the universal ball wheel 51 is placed in the groove, and the sealing plate 52 is provided with the same number of through holes on the table surface of the bracket 50 and one-to-one correspondence. , the sealing plate 52 is pressed on the universal ball wheel 51 and the upper part of the universal ball wheel 51 passes through the through hole, and the surrounding of the sealing plate 52 is fixed on the bracket 50 .

Beneficial effects of the present invention:

An elevator door panel rolling production line is formed by using four sections of unpowered roller lines and an automatic rolling machine. By applying glue and sticking reinforcing ribs on the first two sections of unpowered roller lines, the rolling machine is used in the middle. The reinforcing rib is automatically rolled and pressed, and the riveted connection of the hall door and the reinforcing rib, the riveted connection of the car door and the reinforcing rib, the riveted connection of the car wall and the reinforcing rib, and the riveted connection of the car wall and the reinforcing rib are carried out on the unpowered roller line of the last two sections. The process does not require manual handling, and at the same time, the automatic rolling and pressing of the reinforcing ribs is realized, and the production line of the whole process of rolling of the elevator door wall plate is realized, which improves the production efficiency, reduces the labor cost, and avoids the process and technology. Inconsistencies between parts require manual handling of the product resulting in surface damage to the part. At the same time, the invention adds a universal ball table at the end of the whole process, and realizes the turning of the elevator door panel after rolling processing through the universal ball table, so that the product enters the next production process, and further avoids manual handling of the elevator door. siding.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic structural diagram of the unpowered drum line I, the unpowered drum line II, the unpowered drum line III, and the unpowered drum line IV of the present invention;

Fig. 3 is the structural representation of the rolling machine of the present invention;

Fig. 4 is the left side view of the rolling machine of the present invention;

5 is a schematic structural diagram of a power roller device of the present invention;

Fig. 6 is the left side view of the power roller device of the present invention;

Fig. 7 is the structural representation of the rolling device of the present invention;

8 is a schematic structural diagram of the pressing device of the present invention;

9 is a schematic structural diagram of a universal ball table of the present invention;

FIG. 10 is a schematic structural diagram of the tensioning mechanism of the present invention.

In the figure, 1-unpowered roller line I, 2-unpowered roller line II, 3-roller, 4-unpowered roller line III, 5-unpowered roller line IV, 6-universal ball table, 7- Roller rack, 8-roller bracket, 9-unpowered roller, 10-fluorescent lamp shade, 11-hook carriage, 12-air pipe, 13-shelf, 14-adjustable foot cup, 15-rack, 16- Rolling device, 17-power roller device, 18-roller mounting plate, 19-power roller, 20-deceleration motor, 21-sprocket transmission mechanism, 22-tension mechanism, 23-cover plate, 24-tension seat, 25- Tensioning wheel shaft, 26- Tensioning sprocket, 28- Adjusting fixed plate, 29- Mounting seat, 30- Pressing device, 31- Transition connecting plate, 32- Roller connecting rod, 33- Hinge seat, 34- Roller Pressure roller, 35-up and down adjustment platen, 36-up and down adjustment mechanism, 37-T-shaped screw rod, 38-T-shaped nut, 39-handwheel, 40-thin-wall cylinder, 41-cylinder connection head, 42-cylinder connection seat , 43- Guide rod mounting plate, 44- Spacer block, 45- Pressure wheel fixing seat, 46- Pressure wheel pin, 47- Pressure wheel, 48- Guide sleeve, 49- Guide rod, 50- Bracket, 51- Universal direction Ball wheel, 52-sealing plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Fig. 1, the elevator door panel rolling production line includes unpowered roller line I1, unpowered roller line II2, rolling machine 3, unpowered roller line III4, and unpowered roller line IV5. The power roller line I1 and the unpowered roller line II2 are installed side by side, the unpowered roller line III4 and the unpowered roller line IV5 are installed side by side, and the rolling machine 3 is installed between the power roller line II2 and the unpowered roller line III4.

As shown in Figure 2, the unpowered drum line I1, the unpowered drum line II2, the unpowered drum line III4, and the unpowered drum line IV5 have the same structure, including a drum frame 7, a drum support 8, an unpowered drum 9. The fluorescent lamp cover 10, the hook carriage 11, and the air pipe 12. The roller frame 7 is installed with a roller bracket 8 on the top of the front side, and a non-powered roller 9 is installed on the roller bracket 8. A fluorescent lamp cover 10 is installed on the side, and a hook carriage 11 and an air pipe 12 are installed on the top of the drum frame 7 . By placing the elevator door panel on the unpowered roller 9 of the unpowered roller line I1, and then manually applying glue to the elevator door panel, the unpowered roller 9 can be easily and quickly pushed into the unpowered roller line manually. On the unpowered roller 9 of II2, the reinforcing rib is manually pasted on the elevator door panel. After the reinforcing ribs are pasted, the staff pushes the elevator door panel into the rolling machine 3 to roll the reinforcing ribs. The hook carriage 11 is also provided to place the tools, the tools can be hung on the hook carriage 11 neatly and smoothly, and the tools can be taken according to the needs of production; The dust on the elevator door panel can be cleaned up through the air pipe. By being provided with the fluorescent lamp cover 10, the fluorescent lamp is installed in the fluorescent lamp cover 10 to provide illumination for work.

In the present invention, preferably, the lower part of the drum frame 7 is provided with a storage layer 13 . The storage board 13 is used to place the assembled parts and accessories, so as to ensure the orderly stacking of the parts and accessories.

In the present invention, preferably, the bottom of the drum frame 7 is provided with an adjusting foot cup 14 for supporting the entire drum frame 7 and adjusting the height of the drum frame 7 . In order to ensure that the unpowered rollers I1, II2, III4 and IV5 of the unpowered roller line are on the same horizontal line, it is convenient for the transfer of the elevator door panel.

As shown in FIGS. 3 and 4 , the rolling machine 3 includes a frame 15 , a rolling device 16 , and a power roller device 17 . The power roller device 17 is installed on the frame 15 . A rolling device 16 is installed on the frame 15 , and the bottom of the frame 15 is provided with an adjusting foot cup 14 .

As shown in FIGS. 5 and 6 , the power roller device 17 includes a roller mounting plate 18 , a power roller 19 , a deceleration motor 20 , a sprocket transmission mechanism 21 , and a cover plate 23 , and two rollers are installed in parallel on the frame 15 . Plate 18, the power roller 19 is installed on the two roller mounting plates 18 in an orderly arrangement through bearings, and the two adjacent power rollers 19 are connected by a sprocket mechanism, and one of the power rollers 19 is installed on the frame 15 through the sprocket transmission mechanism 21. The geared motor 20 on the upper frame is connected, and a cover plate 23 for protecting the sprocket transmission mechanism 21 is installed on the frame 15 . The deceleration motor 20 drives the power drum 19 connected to it to rotate through the sprocket transmission mechanism 21, and the power drum 19 drives other power drums 19 to rotate through the sprocket mechanism. A tensioning mechanism 22 for the transmission chain of the tensioning sprocket transmission mechanism 21 is installed on the frame 15 of the 24 is fixedly installed on the frame 15, the tensioning seat 24 is provided with a strip-shaped installation groove, the tensioning wheel shaft 25 is installed in the strip-shaped installation groove, and the tensioning sprocket 26 is installed on the tensioning wheel shaft The tension sprocket 26 meshes with the drive sprocket of the sprocket transmission mechanism 21 . By adjusting the position of the tensioning wheel shaft 25 in the strip-shaped installation groove on the tensioning seat 24, the position of the tensioning sprocket 26 is adjusted, and the transmission chain of the sprocket transmission mechanism 21 is tensioned through the tensioning sprocket 26, so as to ensure the chain tension. The wheel transmission mechanism 21 can work stably. When the elevator door panel is pushed onto the power roller 19 , the elevator door panel is conveyed forward by the rotating power roller 19 under the drive of the deceleration motor 20 .

As shown in FIG. 7 , the rolling device 16 includes an adjustment fixing plate 28 , a mounting seat 29 , a pneumatic pressing device 30 , a transition connecting plate 31 , a roller connecting rod 32 , a hinge seat 33 , a rolling roller 34 , and a vertical adjustment. The pressure plate 35; the adjustment fixing plate 28 is fixedly installed on the frame 15 through the mounting seat 29, the upper and lower adjustment pressure plates 35 are fixedly connected to the transition connecting plate 31, and a roller is installed on both sides of the transition connecting plate 31 through fixing screws. The connecting rod 32, the middle of the roller connecting rod 32 is hinged with the hinge seat 33 installed on the frame 15 through the pin shaft, the rolling roller 34 is installed on the hanging ends of the two roller connecting rods 32 through the bearing, and the frame 15 is installed with There are two pneumatic pressing devices 30 that can correspond to the rolling rollers 34 one-to-one and realize the pressing of the rolling rollers 34 . The pneumatic pressing device 30 includes a thin-walled cylinder 40, a cylinder connecting head 41, a cylinder connecting seat 42, a guide rod mounting plate 43, a cushion block 44, a pressing wheel fixing seat 45, a pressing wheel pin 46, a pressing wheel 47, The guide sleeve 48 and the guide rod 49, the thin-walled cylinder 40 is fixedly installed on the top of the adjustment fixing plate 28, the cylinder connecting head 41 is installed on the piston rod of the thin-walled cylinder 40, and the guide rod mounting plate 43 is installed through the cylinder connecting seat 42 At the bottom of the cylinder connecting head 41 , a guide rod 49 is provided on the guide rod mounting plate 43 , the guide rod 49 passes through the guide sleeve 48 fixedly installed on the adjusting fixing plate 28 , and the bottom of the guide rod mounting plate 43 is mounted with a spacer 44 , the pressure roller fixing seat 45 is installed on the pad 44 , and the pressure roller 47 is installed on the pressure roller fixing seat 45 through the pressure roller pin 46 . When the elevator door panel enters the rolling device 16 under the transmission action of the power roller 19, the rolling roller 34 of the rolling device 16 will be lifted up, so that it is pressed on the surface of the elevator door panel. The pressing roller 34 rolls the reinforcing ribs and applies pressure to the reinforcing ribs of the elevator door panel, so as to achieve the effect that the elevator door panel and the reinforcing ribs are glued together; The reinforcing ribs are rolled to ensure the bonding effect of the reinforcing ribs. During this process, the rolling roller 34 rolls the elevator door panel under its own weight. When the elevator door panel passes under the elevator door panel, the rolling roller 34 will be lifted up, and the thin-walled cylinder will 40 Pneumatically extends its piston rod and pushes out the pressure roller holder 45, so that the pressure roller 47 installed on the pressure roller holder 45 through the pressure roller pin 46 is pressed down on the transition connecting plate 31 to prevent the rolling roller 34 from happening. Jumping ensures that the rolling roller 34 always has a certain strength to press on the elevator door panel, so that the elevator door panel and the reinforcing rib are closely attached.

In the present invention, preferably, the rolling device 16 further includes an up-down adjustment mechanism 36, and the up-down adjustment mechanism 36 includes a T-shaped screw rod 37, a T-shaped nut 38, and a hand wheel 39. The T-shaped nut 38 is installed through the adjustment On the fixing plate 28 , the T-shaped screw rod 37 is installed in the T-shaped nut 38 , and the upper end of the T-shaped screw rod 37 is equipped with a hand wheel 39 . When the air pressure of the thin-walled air cylinder 40 is unstable or other reasons cause the rolling roller 34 to jump, the T-shaped screw 37 can be adjusted to move downward through the handwheel 39 so that the lower end of the T-shaped screw rod 35 is pressed against the upper and lower adjusting plates 35 to prevent the rolling roller 34 jumps, so as to ensure that the rolling roller 34 always has a certain strength to press on the elevator door panel, so as to ensure that the elevator door panel and the reinforcing rib are closely attached.

The elevator door panel fitted with the reinforcing rib is conveyed by the power roller 19, and enters the unpowered roller line III4 and the unpowered roller line IV5. The riveted connection, the riveted connection of the car wall and the reinforcing ribs, completes the processing of the product at this stage.

As shown in FIG. 9 , a universal ball table 6 is provided on the rear side of the unpowered roller line IV5. The universal ball table 6 includes a bracket 50 , a universal ball wheel 51 , and a sealing plate 52 . The bottom of the bracket 50 is The adjusting foot cup 14 is installed, the top of the bracket 50 is a flat table, the grooves are evenly opened on the table, and the universal ball wheels 51 are placed in the grooves. Corresponding to the through hole, the sealing plate 52 is pressed on the universal ball wheel 51 and the upper part of the universal ball wheel 51 passes through the through hole. The surrounding of the sealing plate 52 is fixed on the bracket 50 . The processed product is easily pushed from the unpowered roller line IV5 to the universal ball table 6 manually. Under the action of the universal ball wheel 51, the elevator can be easily reversed manually, so that the product can enter the next process.

The process of the present invention does not require manual handling of the elevator door panel, and the elevator door panel can be quickly and easily transported and reversed through the unpowered roller line I1, the unpowered roller line III4, the unpowered roller line IV5 and the universal ball table 6 transport.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should Various changes can be made thereto without departing from the scope of the invention as defined by the claims.

Claims (9)

1. The utility model provides an elevator door wallboard roll extrusion production line which characterized in that: the elevator door wallboard rolling production line comprises an unpowered roller line I (1), an unpowered roller line II (2), a roller press (3), an unpowered roller line III (4) and an unpowered roller line IV (5), wherein the unpowered roller line I (1) and the unpowered roller line II (2) are installed side by side, the unpowered roller line III (4) and the unpowered roller line IV (5) are installed side by side, and the roller press (3) is installed between the powered roller line II (2) and the unpowered roller line III (4); the roller press (3) comprises a rack (15), a rolling device (16) and a power roller device (17), wherein the power roller device (17) is arranged on the rack (15), the rolling device (16) opposite to the rack (15) above the power roller device (17) is arranged on the rack (15), and an adjusting foot cup (14) is arranged at the bottom of the rack (15); the rolling device (16) comprises an adjusting fixing plate (28), a mounting seat (29), a pneumatic pressing device (30), a transition connecting plate (31), a roller connecting rod (32), a hinge seat (33), a rolling roller (34) and an upper and lower adjusting pressing plate (35); adjusting fixed plate (28) pass through mount pad (29) fixed mounting in frame (15), adjust clamp plate (35) fixed connection from top to bottom on transition connecting plate (31), a cylinder connecting rod (32) is installed through the fixed screw respectively to the both sides of transition connecting plate (31), the middle part of cylinder connecting rod (32) is articulated through round pin axle and hinge seat (33) of installing on frame (15), the overhang end at two cylinder connecting rod (32) is installed through the bearing in roll extrusion cylinder (34), install two pneumatic push-down devices (30) that can just realize roll extrusion cylinder (34) push down with roll extrusion cylinder (34) one-to-one on frame (15).

2. The elevator door panel roll extrusion line of claim 1, wherein: unpowered roller line I (1), unpowered roller line II (2), unpowered roller line III (4), unpowered roller line IV (5) the structure the same, all include cylinder frame (7), cylinder support (8), unpowered cylinder (9), fluorescent lamp shade (10), collude balladeur train (11), trachea (12), the front side top of cylinder frame (7) install cylinder support (8), install unpowered cylinder (9) on cylinder support (8), fluorescent lamp shade (10) are installed to the top front side of cylinder frame (7), the top of cylinder frame (7) is installed and is colluded balladeur train (11), trachea (12).

3. The elevator door panel roll extrusion line of claim 2, wherein: the lower part of the roller frame (7) is provided with an object placing laminate (13).

4. Elevator door panel rolling line according to claim 2 or 3, characterized in that: the bottom of the roller frame (7) is provided with an adjusting foot cup (14) for supporting the whole roller frame (7) and adjusting the height of the roller frame (7).

5. The elevator door panel roll extrusion line of claim 1, wherein: power roller device (17) including cylinder mounting panel (18), power roller (19), gear motor (20), sprocket drive mechanism (21), apron (23), parallel mount has two cylinder mounting panel (18) in frame (15), power roller (19) are installed on two cylinder mounting panel (18) through bearing neatly arranged, two adjacent power roller (19) are connected through sprocket drive mechanism, one of them power roller (19) are connected with gear motor (20) of installing in frame (15) through sprocket drive mechanism (21), install apron (23) that are used for protecting sprocket drive mechanism (21) on frame (15).

6. The elevator door panel roll extrusion line of claim 5, wherein: frame (15) on install straining device (22) that are used for tensioning sprocket drive mechanism (21) drive chain, straining device (22) including tensioning seat (24), take-up pulley axle (25), tension sprocket (26), tensioning seat (24) fixed mounting on frame (15), seted up a bar mounting groove on tensioning seat (24), install in the bar mounting groove in tension pulley axle (25), install on take-up pulley axle (25) through the bearing tension sprocket (26), the drive sprocket meshing of tension sprocket (26) and sprocket drive mechanism (21).

7. The elevator door panel roll extrusion line of claim 1, wherein: the pneumatic pressing device (30) comprises a thin-wall cylinder (40), a cylinder connector (41), a cylinder connecting seat (42), a guide rod mounting plate (43), a cushion block (44), a pressing wheel fixing seat (45), a pressing wheel pin shaft (46), a pressing wheel (47), a guide sleeve (48) and a guide rod (49), wherein the thin-wall cylinder (40) is fixedly mounted at the top of the adjusting fixing plate (28), the cylinder connector (41) is mounted on a piston rod of the thin-wall cylinder (40), the guide rod mounting plate (43) is mounted at the bottom of the cylinder connector (41) through the cylinder connecting seat (42), the guide rod (49) is arranged on the guide rod mounting plate (43), the guide rod (49) penetrates through the guide sleeve (48) fixedly mounted on the adjusting fixing plate (28), the cushion block (44) is mounted at the bottom of the guide rod mounting plate (, the pinch roller (47) is arranged on the pinch roller fixing seat (45) through a pinch roller pin shaft (46).

8. Elevator door panel rolling line according to claim 1 or 7, characterized in that: the rolling device (16) further comprises an upper adjusting mechanism and a lower adjusting mechanism (36), the upper adjusting mechanism and the lower adjusting mechanism (36) comprise a T-shaped screw rod (37), a T-shaped nut (38) and a hand wheel (39), the T-shaped nut (38) is installed on the adjusting fixing plate (28) in a penetrating mode, the T-shaped screw rod (37) is installed in the T-shaped nut (38), and the hand wheel (39) is installed at the upper end of the T-shaped screw rod (37).

9. The elevator door panel roll extrusion line of claim 1, wherein: the rear side of the unpowered roller wire IV (5) is provided with a universal ball table (6), the universal ball table (6) comprises a support (50), universal ball wheels (51) and sealing plates (52), the bottom of the support (50) is provided with an adjusting foot cup (14), the top of the support (50) is a flat table surface, grooves are uniformly formed in the table surface, the universal ball wheels (51) are placed in the grooves, through holes which correspond to the table surface of the support (50) in a one-to-one mode in a same number are formed in the sealing plates (52), the sealing plates (52) are pressed on the universal ball wheels (51), the upper portions of the universal ball wheels (51) penetrate out of the through holes, and the sealing plates (52) are fixed on the support (50) all around.

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