An elevator door panel bending device and bending method

Abstract

This invention relates to the field of sheet metal bending technology, specifically to an elevator door panel bending device and method. The device includes a bending assembly, a bending power assembly, and a pressing assembly. The bending assembly is used for bending elevator door panels. The bending power assembly is vertically movable inside the bending assembly and drives the bending assembly to bend the elevator door panel. By rotating the bending die 90 degrees upwards along the hinged position with the bending table, the elevator door panel undergoes a first sheet metal bending. Then, by extruding an arc-shaped block, the arc-shaped block moves into a recessed groove. This movement of the arc-shaped block is driven by two push rods, causing the extrusion block to move, resulting in a second sheet metal bending of the elevator door panel. This allows the bending device to perform two consecutive bending processes on the elevator door panel, improving bending efficiency and solving the problem of frequent manual adjustments to the elevator door panel position.

Description

Technical Field

[0001] This invention relates to the field of sheet metal bending technology, specifically to an elevator door panel bending device and bending method. Background Technology

[0002] Bending elevator door panels is an essential processing step in elevator door panel manufacturing. Bending elevator door panels refers to the process of bending the four edges of the metal sheet inward after it has been cut. The sheet is manually loaded onto the bending equipment, which then bends the sheet.

[0003] Referring to a Chinese patent application with application number 201911156086.6, an elevator door panel bending device is disclosed. This device uses a combination bending cutter design, where a main bending cutter and a corner bending cutter work together to ensure that the bending cutter does not hit the original bending edge during the bending process, thus completing the bending process on the other side of the door panel. Elevator door panel sheet metal bending typically requires two bending processes. Traditional bending equipment requires two bending operations, necessitating two adjustments to the elevator door panel position. This constant adjustment reduces processing efficiency and is physically demanding for workers. Furthermore, multiple position adjustments can affect the accuracy of sheet metal bending. Therefore, we propose an elevator door panel bending device and method to solve the aforementioned technical problems. Summary of the Invention

[0004] Therefore, the present invention provides an elevator door panel bending device and bending method to solve the above-mentioned problems.

[0005] This invention provides the following technical solution: an elevator door panel bending device, comprising:

[0006] Bending components are used for bending elevator door panels.

[0007] The bending power component is installed inside the bending component and is used to drive the bending component to bend the elevator door panel.

[0008] The downward pressure component is rotatably mounted on top of the bending power component and is used for finishing the elevator door panel after bending.

[0009] As a preferred embodiment of the present invention, the bending assembly includes:

[0010] The U-shaped frame is fixed to the ground with bolts;

[0011] The bending table is fixedly installed on one side of the U-shaped frame by two front and rear fixed corner plates;

[0012] The bending die is mounted on one side of the bending table near the U-shaped frame via a hinge.

[0013] The first settling groove is located at the top of the bending die, away from the bending table.

[0014] The push rod is slidably installed inside the bending die, and extends to the bottom of the bending die and the inside of the sinker.

[0015] The extrusion block is fixedly installed on the top of the front and rear push rods;

[0016] The arc-shaped block is fixedly installed at the bottom of the front and rear top rods;

[0017] The second sink groove is located at the bottom of the bending die, and its position and specifications correspond to the position and specifications of the arc block. The arc block slides inside the second sink groove, which is a downward arched design.

[0018] As a preferred embodiment of the present invention, the bending assembly further includes:

[0019] The second push rod is slidably installed on the side of the bending die away from the bending table, and extends through the interior of the bending die;

[0020] The pressure block is fixedly installed at one end of the front and rear top rods near the bending table, and the pressure block is located at the top of the extrusion block away from the bending table.

[0021] As a preferred embodiment of the present invention, the bending power assembly includes:

[0022] The crossbeam is fixedly installed in the middle of the inner side of the U-shaped frame;

[0023] The cylinders are fixedly installed at the bottom of the crossbeam, front and rear, and their output shafts move through the interior of the crossbeam.

[0024] The bolster block is fixedly installed on the top of the output rods of the front and rear cylinders;

[0025] The bending block is fixedly installed at both the front and rear ends of the bottom of the pillow block;

[0026] The roller is fixedly installed inside the end of the bending block near the bending table and extends between the front and rear bending blocks;

[0027] Rollers are rotatably mounted on the outer walls of the front and rear rollers respectively. The rollers are located at the bottom of the bending die, and the top of the rollers abuts against the bottom of the bending die. The rollers are located on the side of the sink trough away from the U-shaped frame.

[0028] As a preferred embodiment of the present invention, the bending power assembly further includes:

[0029] The guide rods are fixedly installed at the bottom of the pillow block, front and rear, and are slidably installed with the crossbeam via linear bearings;

[0030] An anti-tipping plate is slidably installed on the outer wall of the front and rear guide rods. The anti-tipping plate is located at the bottom of the roller, and the end of the anti-tipping plate is flush with the end of the roller.

[0031] Spring three is sleeved around the guide rod and fixedly installed between the bottom of the pillow block and the top of the anti-tipping plate;

[0032] The limiting blocks are symmetrically distributed and fixedly installed on the top of the anti-tipping plate, and the limiting blocks extend to the bottom of the anti-tipping plate;

[0033] The groove is opened at both ends of the crossbeam and its position corresponds to that of the limiting block;

[0034] The adjusting bolt is threaded and installed at the bottom of the limit block, penetrating the inside of the limit block.

[0035] As a preferred embodiment of the present invention, the pressing component includes:

[0036] Sheet metal top blocks are fixedly installed on the top of the pillow blocks, distributed front and rear.

[0037] The support shaft is rotatably mounted on top of the U-shaped frame;

[0038] The lever is fixedly installed at the front end and rear end of the outer wall of the sheet metal top block, and the position of the lever corresponds one-to-one with the position of the sheet metal top block and the top rod.

[0039] The torsion spring is sleeved on the front end and rear end of the outer wall of the sheet metal top block and is fixedly installed between the U-shaped frame and the lever.

[0040] As a preferred embodiment of the present invention, a second spring is sleeved around the first top rod, and the second spring is fixedly installed between the bottom of the extrusion block and the bottom wall of the first settling trough, and the first top rod protrudes out of the second settling trough.

[0041] As a preferred embodiment of the present invention, a spring is sleeved around the second push rod, a pressure cap is fixedly installed at the end of the second push rod away from the pressure block, and the spring is fixedly installed between the bending die and the pressure cap.

[0042] As a preferred embodiment of the present invention, the top of the bending assembly is fixedly mounted with two hydraulic cylinders, one in front and one in back, by means of a fixing bracket, and a positioning block is fixedly mounted at the bottom of the output rods of the two hydraulic cylinders.

[0043] A method for bending an elevator door panel using an elevator door panel bending device includes the following steps:

[0044] Step 1: Place the elevator door panel on top of the bending table, and at the same time, make the part of the elevator door panel that needs to be bent located on top of the bending mold, and make the bending edge abut against the side of the pressure block. Then, push the positioning block downward through the output rods of the two hydraulic cylinders, so that the bottom of the positioning block presses against the surface of the elevator door panel.

[0045] Step 2: The output rods of the front and rear cylinders push the pillow block upwards, causing the pillow block to move upwards, which in turn moves the bending block, rollers, and rollers together. Since the top of the rollers is in contact with the bottom of the bending mold, the upward movement of the rollers pushes the bending mold to rotate upwards along the position connected to the bending table until the bending mold rotates upwards by 90 degrees. At this time, the edge of the elevator door panel is bent upwards by 90 degrees. Then, the output rods of the front and rear cylinders continue to push the pillow block upwards, causing the rollers to roll upwards along the side of the bending mold and move towards the outer edge of the arc block, squeezing the arc block into the second sink groove. During this period, the second sink groove drives the extrusion block to move outwards from the first sink groove through the two push rods, squeezing the surface of the elevator door panel and bending it around the outer wall of the positioning block, thus performing a second bending of the elevator door panel.

[0046] Step 3: After the elevator door panel is bent a second time, the output rods of the two cylinders continue to push the pillow block upwards. The rollers roll along the surface of the arc-shaped block and eventually separate from the top of the arc-shaped block. In other words, the squeezing action of the rollers on the arc-shaped block ends, and the spring two, which is in a stretched and stored state, releases its rebound force, pushing the top rod one, the squeezing block, and the arc-shaped block back to their original positions. At the same time, the upward movement of the pillow block also drives the two sheet metal top blocks to move together. When the rollers separate from the arc-shaped block, the top of the sheet metal top block just contacts one end of the bottom of the lever, pushing one end of the lever upwards and causing the lever to rotate around the support shaft. Meanwhile, the end of the lever away from the sheet metal top block presses down on the top of the pressure cap, pushing the top rod two and the pressure block downwards. The pressure block moves downwards, applying downward pressure to the second bent part of the elevator door panel.

[0047] Compared with the prior art, the beneficial effects of the present invention are:

[0048] 1. In this invention, the elevator door panel is first bent by rotating the bending die 90 degrees upward along the position hinged to the bending table. Then, the curved block is moved into the groove by extruding the curved block. The movement of the curved block is driven by the two push rods to move the extrusion block, thus performing a second sheet metal bending on the elevator door panel. This bending device can perform two consecutive bending processes on the elevator door panel, which is beneficial to improving the bending efficiency of the elevator door panel. At the same time, it also solves the problem of frequent manual adjustment of the elevator door panel position.

[0049] 2. In this invention, after the second bending, the top of the pressure cap is pressed downwards, pushing the top rod and the pressure block downwards. The pressure block moves downwards, applying downward pressure to the second bending part of the elevator door panel, thereby improving the bending effect.

[0050] 3. In this invention, the bending power assembly sequentially bends the sheet metal on both the front and rear sides of the elevator door panel, and also drives two sheet metal top blocks to move together. When the roller separates from the arc block, the top of the sheet metal top block just contacts one end of the bottom of the lever, pushing one end of the lever upward, causing the lever to rotate around the support shaft, while the end of the lever away from the sheet metal top block presses down on the top of the pressure cap, pushing the top rod and the pressure block downward. The pressure block moves downward, applying downward pressure to the secondary bending part of the elevator door panel. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of the present invention;

[0052] Figure 2 In this invention Figure 1 A schematic diagram of the planar structure;

[0053] Figure 3 This is a schematic diagram of the bending component in this invention;

[0054] Figure 4 In this invention Figure 3 A magnified structural diagram of part A;

[0055] Figure 5 This is a detailed structural diagram of the bending component in this invention;

[0056] Figure 6 This is a side sectional view of the bending die in this invention;

[0057] Figure 7 In this invention Figure 5 A schematic diagram of the enlarged structure of part B;

[0058] Figure 8 This is a schematic diagram of the bottom view structure of the bending power component in this invention;

[0059] Figure 9 In this invention Figure 8 A schematic diagram of the planar structure.

[0060] In the diagram: 100, Bending assembly; 101, U-shaped frame; 102, Bending table; 103, Bending die; 104, Slot 1; 105, Push rod 1; 106, Extrusion block; 107, Arc block; 108, Slot 2; 109, Push rod 2; 1010, Pressure block; 1011, Spring 1; 1012, Spring 2; 1013, Pressure cap; 200, Bending power assembly; 201, Crossbeam; 202 203. Cylinder; 204. Pillow block; 205. Bending block; 206. Roller; 207. Anti-tipping plate; 208. Spring 3; 209. Limiting block; 2010. Groove; 2011. Guide rod; 2012. Adjusting bolt; 300. Pressing assembly; 301. Sheet metal top block; 302. Support shaft; 303. Lever; 304. Torsion spring; 401. Hydraulic cylinder; 402. Positioning block. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] Example: Please refer to Figure 1-9 The elevator door panel bending device shown includes a bending assembly 100, a bending power assembly 200, and a pressing assembly 300. The bending assembly 100 is used for bending the elevator door panel. The bending power assembly 200 is movably disposed inside the bending assembly 100 and is used to drive the bending assembly 100 to bend the elevator door panel. The pressing assembly 300 is rotatably disposed on the top of the bending power assembly 200 and is used for finishing the elevator door panel after bending. Two hydraulic cylinders 401 are fixedly installed on the top of the bending assembly 100 by a fixing bracket. A positioning block 402 is fixedly installed at the bottom of the output rods of the two hydraulic cylinders 401.

[0063] For further details, please refer to [link / reference]. Figure 4 - Figure 9 As shown:

[0064] The bending assembly 100 includes a U-shaped frame 101, a bending table 102, a bending die 103, a first sinker 104, a first push rod 105, an extrusion block 106, an arc-shaped block 107, a second sinker 108, a second push rod 109, a pressure block 1010, a first spring 1011, and a second spring 1012. The U-shaped frame 101 is fixedly installed on the ground by bolts. The bending table 102 is fixedly installed on one side of the U-shaped frame 101 by two front and rear fixed corner plates. The bending die 103 is hinged and rotated. The first groove 104 is located on the side of the bending table 102 near the U-shaped frame 101. The top of the bending die 103 is located away from the bending table 102. The first push rod 105 is slidably installed inside the bending die 103, extending to the bottom of the bending die 103 and inside the first groove 104. The extrusion block 106 is fixedly installed on the top of the two push rods 105. The arc-shaped block 107 is fixedly installed on the bottom of the two push rods 105. The second groove 108 is located on the side of the bending die. The bottom of the die 103 is positioned and its dimensions correspond to those of the arc-shaped block 107. The arc-shaped block 107 slides inside the sinker 108, which is a downward-facing arched shape. The push rods 109 are slidably mounted on the side of the bending die 103 away from the bending table 102 and penetrate the interior of the bending die 103. The pressure block 1010 is fixedly mounted on the end of the two push rods 109 near the bending table 102 and is located on the extrusion block 106. At the end of the top away from the bending table 102, a spring 1012 is sleeved around the top rod 105. The spring 1012 is fixedly installed between the bottom of the extrusion block 106 and the bottom wall of the sinker 104. The top rod 105 protrudes from the sinker 108. A spring 1011 is sleeved around the top rod 109. A pressure cap 1013 is fixedly installed at the end of the top rod 109 away from the pressure block 1010. The spring 1011 is fixedly installed between the bending die 103 and the pressure cap 1013.

[0065] Specifically, the elevator door panel is placed on top of the bending table 102, while the part of the elevator door panel to be bent is positioned on top of the bending mold 103, and the bending edge abuts against the side of the pressure block 1010 (as per the instruction manual). Figure 1(As shown in the diagram), then, the output rods of the two hydraulic cylinders 401 push the positioning block 402 downwards, causing the bottom of the positioning block 402 to press against the surface of the elevator door panel, preventing it from moving easily. It should be noted that the side of the positioning block 402 near the bending die 103 is exactly located at the bending position of the elevator door panel, and the height of the positioning block 402 is the same as the height of the second bending of the elevator door panel. By rotating the bending die 103 upwards by 90 degrees along the position hinged to the bending table 102, the elevator door panel is bent for the first time. Afterwards, by pressing the arc-shaped block 107, the arc-shaped block 107 is made to sink into the groove. The internal movement of the second 108 and the movement of the arc block 107 drive the extrusion block 106 to move via the two top rods 105, performing secondary sheet metal work on the elevator door panel. This allows the bending device to perform two consecutive bending processes on the elevator door panel, which helps improve the bending efficiency of the elevator door panel. At the same time, it also solves the problem of frequent manual adjustment of the elevator door panel position, saving labor. After the secondary bending, by pressing the top of the pressure cap 1013 downward, the top rod 109 and the pressure block 1010 are pushed downward. The pressure block 1010 moves downward, applying downward pressure to the secondary bent part of the elevator door panel, improving the bending effect.

[0066] For further details, please refer to [link / reference]. Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 As shown:

[0067] The bending power assembly 200 includes a crossbeam 201, a cylinder 202, a bolster block 203, a bending block 204, a roller 205, a roller 206, an anti-tipping plate 207, a spring 208, a limit block 209, a groove 2010, a guide rod 2011, and an adjusting bolt 2012. The crossbeam 201 is fixedly installed in the middle of the inner side of the U-shaped frame 101. The cylinder 202 is fixedly installed at the bottom of the crossbeam 201, with its output shaft movably passing through the crossbeam 201. Inside, a pillow block 203 is fixedly installed on the top of the output rods of the front and rear cylinders 202. A bending block 204 is fixedly installed at the front and rear ends of the bottom of the pillow block 203. A roller 205 is fixedly installed inside the end of the bending block 204 near the bending table 102 and extends between the front and rear bending blocks 204. Rollers 206 are rotatably installed on the outer walls of the front and rear rollers 205 respectively. The rollers 206 are located at the bottom of the bending die 103, and the top of the rollers 206 abuts against the bottom of the bending die 103. The rollers 206 are located on the side of the sinker 108 away from the U-shaped frame 101. Guide rods 2011 are fixedly installed at the bottom of the pillow block 203 and are slidably installed with the crossbeam 201 via linear bearings. Anti-tipping plates 207 are slidably installed on the outer walls of the front and rear guide rods 2011. Anti-tipping plates 207 are located at the bottom of the rollers 206, and the ends of the anti-tipping plates 207 are flush with the ends of the rollers 206. A spring 3 208 is set. Located around the guide rod 2011 and fixedly installed between the bottom of the pillow block 203 and the top of the anti-tipping plate 207, the limiting block 209 is symmetrically distributed and fixedly installed on the top of the anti-tipping plate 207, and the limiting block 209 extends to the bottom of the anti-tipping plate 207. The groove 2010 is opened at both ends of the crossbeam 201 and its position corresponds to the limiting block 209. The adjusting bolt 2012 is threaded on the bottom of the limiting block 209 and penetrates the interior of the limiting block 209.

[0068] Specifically, the output rods of the two cylinders 202 push the pillow block 203 upward, causing it to move. This upward movement of the pillow block 203 drives the bending block 204, roller 205, and roller 206 to move together. Since the top of the roller 206 abuts against the bottom of the bending die 103, the upward movement of the roller 206 pushes the bending die 103 to rotate upward along the position connected to the bending table 102, bending the elevator door panel sheet metal. Then, the output rods of the two cylinders 202 continue to push the pillow block 203 upward, causing the roller 206 to roll upward along the side of the bending die 103, moving towards the outer edge of the arc-shaped block 107, squeezing the arc-shaped block 107 into the sinker 108. During this process, the sinker 108 is propelled by two push rods 105. The moving extrusion block 106 moves outward to the sink 104, squeezing the surface of the elevator door panel and bending it around the outer wall of the positioning block 402, thus performing a secondary bend on the elevator door panel. The upward movement of the pillow block 203 also drives the two guide rods 2011 to slide upward along the inside of the crossbeam 201. The two guide rods 2011 simultaneously drive the anti-tipping plate 207, the two front and rear springs 208, and the two limit blocks 209 to move together, so that the end of the anti-tipping plate 207 slides to contact the side of the bending mold 103 after it has been flipped 90 degrees. Thus, after the roller 206 separates from the bending mold 103, the bending mold 103 will not reverse due to the contact action of the anti-tipping plate 207 against the bending mold 103, thereby ensuring bending stability and bending accuracy.

[0069] For further details, please refer to [link / reference]. Figure 8 , Figure 9 As shown:

[0070] The pressing assembly 300 includes a sheet metal top block 301, a support shaft 302, a lever 303, and a torsion spring 304. The sheet metal top block 301 is fixedly installed on the top of the pillow block 203, distributed front and rear. The support shaft 302 is rotatably installed on the top of the U-shaped frame 101. The lever 303 is fixedly installed on the front end and rear end of the outer wall of the sheet metal top block 301. The position of the lever 303 corresponds one-to-one with the position of the sheet metal top block 301 and the second push rod 109. The torsion spring 304 is sleeved on the front end and rear end of the outer wall of the sheet metal top block 301 and is fixedly installed between the U-shaped frame 101 and the lever 303.

[0071] Specifically, after the elevator door panel is bent a second time, the output rods of the two cylinders 202 continue to push the pillow block 203 upward, and the roller 206 rolls along the surface of the arc-shaped block 107, eventually separating from the top of the arc-shaped block 107. That is to say, the squeezing action of the roller 206 on the arc-shaped block 107 ends, and the spring 1012, which is in a stretched and stored state, releases its rebound force, pushing the top rod 105, the squeezing block 106, and the arc-shaped block 107 to reset. At the same time, the upward movement of the pillow block 203 also drives the two sheet metal top blocks 30. 1. Move together. When the roller 206 separates from the arc block 107, the top of the sheet metal top block 301 just contacts the bottom end of the lever 303, pushing one end of the lever 303 upward, causing the lever 303 to rotate around the support shaft 302. At the same time, the torsion spring 304 accumulates elastic force, and the end of the lever 303 away from the sheet metal top block 301 presses down on the top of the pressure cap 1013, pushing the top rod 109 and the pressure block 1010 downward. The pressure block 1010 moves downward, applying downward pressure to the secondary bending part of the elevator door panel, improving the bending effect.

[0072] A method for bending an elevator door panel using an elevator door panel bending device includes the following steps:

[0073] Step 1: Place the elevator door panel on top of the bending table 102, and at the same time, make the part of the elevator door panel that needs to be bent located on top of the bending mold 103, and make the bending edge abut against the side of the pressure block 1010. Then, push the positioning block 402 downward through the output rods of the two hydraulic cylinders 401, so that the bottom of the positioning block 402 presses against the surface of the elevator door panel.

[0074] Step 2: The output rods of the two cylinders 202 push the pillow block 203 upward, causing it to move. The upward movement of the pillow block 203 moves the bending block 204, roller 205, and roller 206 together. Since the top of the roller 206 abuts against the bottom of the bending die 103, the upward movement of the roller 206 pushes the bending die 103 to rotate upward along the position where it is connected to the bending table 102, until the bending die 103 rotates upward 90 degrees. At this point, the edge of the elevator door panel is bent upward 90 degrees. Then, the output rods of the two cylinders 202 continue to push the pillow block 203 upward, causing the roller 206 to roll upward along the side of the bending die 103 and move towards the outer edge of the arc block 107, squeezing the arc block 107 into the sink trough 2 108. During this period, the sink trough 2 108 drives the extrusion block 106 to move towards the outside of the sink trough 1 104 through the two push rods 105, squeezing the surface of the elevator door panel, making it bend around the outer wall of the positioning block 402, and performing a secondary bend on the elevator door panel.

[0075] Step 3: After the elevator door panel is bent a second time, the output rods of the two cylinders 202 continue to push the pillow block 203 upward. The roller 206 rolls along the surface of the arc-shaped block 107, eventually separating from the top of the arc-shaped block 107. That is to say, the squeezing action of the roller 206 on the arc-shaped block 107 ends, and the spring 1012, which is in a stretched and stored state, releases its rebound force, pushing the top rod 105, the squeezing block 106, and the arc-shaped block 107 to reset. At the same time, the pillow block 203 moves upward, also bringing... The two sheet metal top blocks 301 move together. When the roller 206 separates from the arc block 107, the top of the sheet metal top block 301 just contacts the bottom end of the lever 303. This pushes one end of the lever 303 upward, causing the lever 303 to rotate around the support shaft 302. The end of the lever 303 away from the sheet metal top block 301 then presses down on the top of the pressure cap 1013, pushing the top rod 109 and the pressure block 1010 downward. The pressure block 1010 moves downward, applying downward pressure to the secondary bending part of the elevator door panel.

[0076] This elevator door panel bending device, when in operation, places the elevator door panel on top of the bending table 102, while simultaneously ensuring that the portion of the elevator door panel to be bent is positioned on top of the bending mold 103, and that the bending edge abuts against the side of the pressure block 1010 (as per the instruction manual). Figure 1 (as shown in the figure) Then, the positioning block 402 is pushed down by the output rods of the two hydraulic cylinders 401, so that the bottom of the positioning block 402 is pressed against the surface of the elevator door panel, so that it does not move easily. It should be noted that the side of the positioning block 402 that is close to the bending mold 103 is just located at the bending position of the elevator door panel, and the height of the positioning block 402 is the same as the second bending height of the elevator door panel.

[0077] The output rods of the two cylinders 202 push the pillow block 203 upward, causing the bending block 204, roller 205, and roller 206 to move together. Since the top of the roller 206 abuts against the bottom of the bending die 103, the upward movement of the roller 206 pushes the bending die 103 to rotate upward along the position where it is rotatably connected to the bending table 102, until the bending die 103 rotates upward 90 degrees (as per the instruction manual). Figure 9As shown), at this time, the edge of the elevator door panel is bent upward by 90 degrees. Then, the output rods of the front and rear cylinders 202 continue to push the pillow block 203 upward, causing the roller 206 to roll upward along the side of the bending mold 103 and move towards the outer edge of the arc block 107, squeezing the arc block 107 into the sink groove 108. During this period, the sink groove 108 drives the extrusion block 106 to move towards the outside of the sink groove 104 through the two push rods 105, squeezing the surface of the elevator door panel and bending it around the outer wall of the positioning block 402, thus performing a second bending of the elevator door panel. Furthermore, the movement of the extrusion block 106 causes the spring 1012 to be stretched and accumulate elastic force. Through the above steps, it is possible to perform two continuous bending processes on the elevator door panel after it has been positioned once, which is beneficial to improve the bending efficiency of the elevator door panel. At the same time, it also solves the problem of frequent manual adjustment of the elevator door panel position, saving labor.

[0078] After the elevator door panel is bent a second time, the output rods of the two cylinders 202 continue to push the pillow block 203 upward. The roller 206 rolls along the surface of the arc-shaped block 107 and eventually separates from the top of the arc-shaped block 107. That is to say, the squeezing action of the roller 206 on the arc-shaped block 107 ends, and the spring 1012, which is in a stretched and stored state, releases its rebound force, pushing the top rod 105, the extrusion block 106, and the arc-shaped block 107 to reset. At the same time, the upward movement of the pillow block 203 also drives the two sheet metal top blocks 301 to move upward. As the roller 206 separates from the arc block 107, the top of the sheet metal top block 301 contacts one end of the bottom of the lever 303, pushing one end of the lever 303 upward, causing the lever 303 to rotate around the support shaft 302. At the same time, the torsion spring 304 accumulates elastic force, and the end of the lever 303 away from the sheet metal top block 301 presses down on the top of the pressure cap 1013, pushing the top rod 109 and the pressure block 1010 downward. The pressure block 1010 moves downward, applying downward pressure to the secondary bending part of the elevator door panel, improving the bending effect.

[0079] It should be noted that the upward movement of the pillow block 203 also causes the two guide rods 2011 to slide upward along the inside of the crossbeam 201. The two guide rods 2011 simultaneously drive the anti-tipping plate 207, the two front and rear springs 208, and the two limiting blocks 209 to move together. This causes the end of the anti-tipping plate 207 to slide to the side of the bending die 103 after it has been rotated 90 degrees and come into contact with it. Thus, after the roller 206 separates from the bending die 103, the bending die 103 will not reverse due to the contact action of the anti-tipping plate 207 with the bending die 103, thereby ensuring bending stability and bending accuracy. Furthermore, the upward movement of the anti-tipping plate 207 causes the limiting blocks 209 and the adjusting bolts 2012 to move upward together. When the top of the adjusting bolts 2012 comes into contact with the bottom of the crossbeam 201, the anti-tipping plate 207 stops moving upward. At this time, if the pillow block 203 continues to move upward, the springs 208 will be stretched and accumulate elastic force.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator door panel folding device, characterized by: Include: Bending assembly (100) for elevator door plate bending processing; Bending power assembly (200) is arranged in the inside of bending assembly (100) up and down, for driving bending assembly (100) bending elevator door plate; The lower pressure assembly (300) is rotationally arranged at the top of bending power assembly (200), for arranging after bending of elevator door plate; The bending assembly (100) includes: U-shaped frame (101) is fixedly installed on the ground by bolt; Bending table (102) is fixedly installed on one side of U-shaped frame (101) by front and rear two fixed angle plates; Bending die (103) is rotatably installed on the side of bending table (102) close to U-shaped frame (101); Sunk groove one (104) is opened in the end of bending die (103) top away from bending table (102); Top rod one (105) is slidably installed in the inside of bending die (103) and extends to the inside of bending die (103) bottom and sunk groove one (104), spring two (1012) is peripherally sleeved on top rod one (105); Extrusion block (106) is fixedly installed on the top of front and rear two top rod one (105), spring two (1012) is fixedly installed between the bottom of extrusion block (106) and the bottom wall of sunk groove one (104); Arc block (107) is fixedly installed on the bottom of front and rear two top rod one (105); Sunk groove two (108) is opened in the bottom of bending die (103), and the position and specification correspond to the position and specification of arc block (107), arc block (107) is slidably located in the inside of sunk groove two (108), sunk groove two (108) is arranged in the shape of downward arch, and top rod one (105) protrudes from sunk groove two (108).

2. The elevator door plate bending device according to claim 1, wherein: The bending assembly (100) further comprises: Top rod two (109) is slidably installed on the side of bending die (103) away from bending table (102) and penetrates the inside of bending die (103); Pressing block (1010) is fixedly installed on the end of front and rear two top rod two (109) close to bending table (102), and pressing block (1010) is located on the end of extrusion block (106) top away from bending table (102).

3. The elevator door plate bending device according to claim 2, wherein: The bending power assembly (200) comprises: Cross beam (201) is fixedly installed on the inside of U-shaped frame (101) middle part; Cylinder (202) is fixedly installed on the bottom of cross beam (201) in front and back, and the output shaft thereof is movably penetrated through the inside of cross beam (201); Pillow block (203) is fixedly installed on the top of output rod of front and rear two cylinders (202); Bending block (204) is fixedly installed on the bottom of pillow block (203) front and back; Rolling shaft (205) is fixedly installed in the inside of bending block (204) close to bending table (102) one end, and extends to between front and rear two bending blocks (204). Roller (206), respectively, rotatingly installed on the outer wall of the front and rear two rollers (205), the roller (206) is located at the bottom of the bending die (103), and the top of the roller (206) is in contact with the bottom of the bending die (103), and the roller (206) is located on the side of the sink (108) away from the U-shaped frame (101).

4. The elevator door plate bending device according to claim 3, characterized in that: The bending power assembly (200) further comprises: The guide rod (2011) is fixedly installed on the bottom of the pillow block (203) and is slidably installed on the horizontal beam (201) through a linear bearing; The anti-overturning stop plate (207) is slidably installed on the outer wall of the front and rear two guide rods (2011), and the anti-overturning stop plate (207) is located at the bottom of the roller (206), and the end of the anti-overturning stop plate (207) is flush with the end of the roller (206) up and down; The spring three (208) is sleeved on the outer periphery of the guide rod (2011) and is fixedly installed between the bottom of the pillow block (203) and the top of the anti-overturning stop plate (207); The limiting block (209) is fixedly installed on the top of the anti-overturning stop plate (207) and symmetrically distributed front and rear, and the limiting block (209) extends to the bottom of the anti-overturning stop plate (207); The groove (2010) is opened on the front and rear ends of the horizontal beam (201), and the position corresponds to the limiting block (209); The adjusting bolt (2012) is threadedly installed on the bottom of the limiting block (209) and penetrates the inside of the limiting block (209).

5. The elevator door plate bending device according to claim 4, characterized in that: The pressing assembly (300) comprises: The sheet metal top block (301) is fixedly installed on the top of the pillow block (203) and is distributed front and rear; The support shaft (302) is rotatably installed on the top of the U-shaped frame (101); The lever (303) is fixedly installed on the outer wall front end and outer wall rear end of the sheet metal top block (301), and the position of the lever (303) corresponds to the position of the sheet metal top block (301) and the top rod two (109).

6. The elevator door plate bending device according to claim 5, characterized in that: The pressing assembly (300) further comprises: The torsional spring (304) is sleeved on the outer wall front end and outer wall rear end of the sheet metal top block (301) and is fixedly installed between the U-shaped frame (101) and the lever (303).

7. The elevator door plate bending device according to claim 6, characterized in that: The top rod two (109) is sleeved with a spring one (1011) on the outer periphery, one end of the top rod two (109) away from the pressing block (1010) is fixedly installed with a pressing cap (1013), and the spring one (1011) is fixedly installed between the bending die (103) and the pressing cap (1013).

8. The elevator door plate bending device according to claim 7, characterized in that: The top of the bending assembly (100) is fixedly installed with two oil cylinders (401) through the setting of a fixed frame, and the output rod bottom of the two oil cylinders (401) is fixedly installed with a positioning block (402).

9. A method of bending an elevator door panel with the apparatus of claim 8, wherein: The use steps comprise: First step: the elevator door panel is placed on the bending table (102) top, at the same time, the part of the elevator door panel that needs to be bent is located on the bending die (103) top, and the bending edge is in contact with the side of the pressing block (1010). The output rod of the two oil cylinders (401) pushes down the positioning block (402), so that the bottom of the positioning block (402) is pressed on the surface of the elevator door panel; Second step: the output rod of the front and rear cylinders (202) pushes up the pillow block (203) to move. The pillow block (203) moves upward to drive the bending block (204), the roller shaft (205) and the roller (206) to move together. The roller (206) moves upward to push the bending die (103) to overturn upward along the rotating connection position with the bending table (102), until the bending die (103) overturns upward by 90 degrees. The output rod of the front and rear cylinders (202) continues to push the pillow block (203) to move upward, and the roller (206) rolls upward along the side of the bending die (103), extruding the arc block (107) into the inside of the sink groove two (108). The sink groove two (108) moves the extrusion block (106) to the outside of the sink groove one (104) through the two top rods one (105), extruding the surface of the elevator door panel, so that it is bent around the outer wall of the positioning block (402); Third step: when the elevator door panel is bent twice, the output rod of the two cylinders (202) continues to push the pillow block (203) to move upward, and the roller (206) rolls along the surface of the arc block (107) and finally separates from the top of the arc block (107). The spring two (1012) in the stretched and stored state releases the rebound force, pushes the top rod one (105), the extrusion block (106) and the arc block (107) to reset, and the pillow block (203) moves upward to drive the two metal top blocks (301) to move together. When the roller (206) is separated from the arc block (107), the top of the metal top block (301) is in contact with one end of the lever (303) at the bottom, pushing the lever (303) upward, so that the lever (303) rotates around the shaft (302), and the end of the lever (303) away from the metal top block (301) extrudes the top of the pressing cap (1013) downward, pushing the top rod two (109) and the pressing block (1010) downward. The pressing block (1010) moves downward to press the second bending part of the elevator door panel downward.

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