Square tube ladder pedal assembling production line

Abstract

The invention provides a square tube ladder pedal assembling production line which comprises a pedal feeding machine, a pedal pad feeding machine, a pressing machine and a tube penetrating machine which are distributed in the conveying direction of a conveying belt, a jig moving along the conveying belt is arranged on the conveying belt, and a plurality of pedal stations are arranged on the jig. Lifting mechanisms are arranged at the positions, corresponding to the pedal feeding machine, the pedal pad feeding machine, the pressing machine and the pipe penetrating machine, of the conveying belt, and the lifting mechanisms are used for lifting the jigs. A plurality of procedures such as pedal feeding, pedal pad feeding, press-fit fixing, pipe penetrating and the like are integrated on one automatic production line, and a conveying belt and a positionable jig are connected in series, so that continuous line production from components to semi-finished products is realized. Therefore, manual intervention and material carrying required by traditional dispersion operation are remarkably reduced, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to a production line for assembling square tube stair treads. Background Technology

[0002] Square tube ladders, a common type of climbing equipment, typically consist of two ladder frames on either side and multiple treads horizontally fixed between the frames to provide a flat surface for stepping. In traditional square tube ladder manufacturing, the assembly of the treads relies heavily on manual or semi-automated operations, resulting in low production efficiency and difficulty in ensuring consistency. Specifically, the processes of loading, aligning, pressing, and threading the treads, anti-slip or cushioning pads, and the square tubes connecting the treads are usually carried out separately, requiring frequent intervention and handling by operators. This not only results in high labor intensity but also poses certain safety risks.

[0003] Therefore, it is necessary to make further improvements. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems. We provide a square tube stair tread assembly line to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides a square tube stair tread assembly production line, which includes a tread feeder, a tread pad feeder, a pressing machine, and a tube threading machine distributed along the conveyor belt transmission direction. A jig that moves along the conveyor belt is provided on the conveyor belt, and the jig is provided with multiple tread stations. A lifting mechanism is provided on the conveyor belt at the positions corresponding to the tread feeder, tread pad feeder, pressing machine, and tube threading machine. The lifting mechanism is used to lift the jig. The pedal feeder includes a first gantry frame, a pedal rack frame, and a first feeding mechanism. The first gantry frame spans above the conveyor belt, and the first feeding mechanism can move along the first gantry frame. The first gantry frame is provided with a first driving mechanism that drives the first feeding mechanism to move. The first feeding mechanism is used to transfer the pedals on the pedal rack frame to the pedal station. The pedal pad feeding machine includes a second gantry frame, a pedal pad stacking frame, and a second feeding mechanism. The second gantry frame spans above the conveyor belt, and the second feeding mechanism can move along the second gantry frame. The second gantry frame is provided with a second driving mechanism to drive the second feeding mechanism to move. The second feeding mechanism is used to transfer the pedal pads on the pedal pad stacking frame to the pedals placed at the pedal station. The pressing machine includes a frame and pressing mechanisms mounted on the frame. The number of pressing mechanisms corresponds to the number of pedal stations. The pressing mechanism includes a first cylinder and a pressure plate. The first cylinder is used to drive the pressure plate to move up and down. The pressure plate can press into the pedal station. The pipe threading machine includes a third gantry frame, a pipe unloading mechanism, a third loading mechanism, and a pipe threading mechanism. The third gantry frame spans above the conveyor belt. The third loading mechanism can move along the third gantry frame. The third gantry frame is equipped with a third driving mechanism to drive the third loading mechanism to move. The third feeding mechanism is used to transfer the pipes on the pipe unloading mechanism to the pipe threading mechanism. The pipe threading mechanism is used to thread the pipes into the pedals placed at the pedal station.

[0006] In one or more embodiments, the pipe feeding mechanism includes a pipe rack, a first linear guide rail, and a pipe hopper mounted on the machine body. The first linear guide rail is used to drive the pipe rack to move. The pipe rack has multiple pipe outlets spaced apart along its length. The pipe hopper is provided with a feeding roller at its outlet. The feeding roller is provided with a pipe groove for placing pipes. The feeding roller can output one pipe from the pipe hopper each time it rotates. The pipe outlet on the pipe rack is used to receive the pipes output from the feeding roller.

[0007] In one or more embodiments, the tube rack includes a base plate and an upper frame body. The upper frame body and the base plate are connected by a sliding rod. The base plate is provided with a second cylinder for driving the upper frame body to rise and fall. Side plates are provided on both sides of the upper frame body. The plurality of tube outlets are provided on the side plates. The tube hopper is provided with a receiving plate below the feeding roller. The receiving plate has clearances to avoid the side plates.

[0008] In one or more embodiments, the pipe rack is equipped with a pipe fitting sensor at each pipe outlet.

[0009] In one or more embodiments, the lifting mechanism includes a frame, a lifting plate, and a third cylinder. The third cylinder is mounted on the frame, and the cylinder shaft of the third cylinder is connected to the bottom of the lifting plate. A positioning part is provided above the lifting plate, and a positioning hole corresponding to the positioning part is provided on the fixture.

[0010] In one or more embodiments, the pipe threading mechanism is located above the conveyor belt. The pipe threading mechanism includes a fixed plate, a movable plate, and a second linear guide rail. The second linear guide rail is mounted on the fixed plate. The movable plate is slidably connected to the fixed plate and driven by the second linear guide rail. The movable plate is provided with a first pneumatic gripper, which is the same number as the number of pedal stations. The first pneumatic gripper is used to clamp the pipe.

[0011] In one or more embodiments, the third feeding mechanism includes a first horizontal rail, a first slide block, and a first vertical rail. The first horizontal rail is slidably connected to the third gantry frame. The first slide block can move along the first horizontal rail. The first horizontal rail extends along the transmission direction of the conveyor belt. The first vertical rail is disposed on the first slide block and can move up and down relative to the first slide block. The first vertical rail is provided with a second pneumatic gripper for clamping the pipe fitting.

[0012] In one or more embodiments, the first slide is provided with a first motor, the first motor is connected to a first gear, and the first horizontal rail is provided with a first rack that meshes with the first gear; the first slide is provided with a second motor, the second motor is connected to a second gear, the first vertical rail is provided with a second rack that meshes with the second gear, and the first horizontal rail and the first vertical rail are provided with a first slide rail that is slidably connected to the first slide.

[0013] In one or more embodiments, the first feeding mechanism includes a second horizontal rail, a second slide block, and a second vertical rail. The second slide block can move along the second horizontal rail, which extends along the transmission direction of the conveyor belt. The second vertical rail is disposed on the second slide block and can move up and down relative to the second slide block. The second vertical rail is provided with a vacuum suction cup.

[0014] In one or more embodiments, a third motor is provided on the second slide block, a third gear is connected to the third motor, a third rack that meshes with the third gear is provided on the second horizontal rail, a fourth motor is provided on the second slide block, a fourth gear is connected to the fourth motor, a fourth rack that meshes with the fourth gear is provided on the second vertical rail, and a second slide rail that is slidably connected to the second slide block is provided on the second horizontal rail and the second vertical rail.

[0015] Because this invention adopts the above-mentioned solution—integrating multiple processes such as pedal loading, pedal pad loading, pressing and fixing, and pipe threading into an automated production line, and connecting them in series using conveyor belts and positionable jigs—it achieves continuous assembly line operation from parts to semi-finished products. This significantly reduces the manual intervention and material handling required by traditional decentralized operations, and greatly improves production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the square tube pedal assembly production line according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the pedal feeder according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the pedal mat feeding machine according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the pressing machine and lifting mechanism according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the tube-threading machine according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the feeding mechanism according to an embodiment of the present invention; Figure 7 for Figure 5 Enlarged view of the area within the dashed box; Figure 8 This is a schematic diagram of the tube-threading mechanism according to an embodiment of the present invention; Figure 9This is a schematic diagram of the structure of the metallurgical tool according to an embodiment of the present invention; Figure 10 for Figure 5 A magnified view of A in the middle. Detailed Implementation

[0017] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0018] Please refer to the appendix. Figure 1-10 This invention provides a square tube stair tread assembly production line, which includes a tread feeder 200, a tread pad feeder 300, a pressing machine 400, and a tube threading machine 500 distributed along the conveying direction of a conveyor belt 100. A jig 600 that moves along the conveyor belt 100 is provided, and the jig 600 is provided with multiple tread workstations 700. A lifting mechanism 800 is provided at each position of the conveyor belt 100 corresponding to the tread feeder 200, the tread pad feeder 300, the pressing machine 400, and the tube threading machine 500. The lifting mechanism 800 is used to lift the jig 600. See Figure 2 The pedal feeder 200 includes a first gantry frame 201, a pedal rack 202, and a first feeding mechanism. The first gantry frame 201 spans above the conveyor belt 100. The first feeding mechanism can move along the first gantry frame 201. The first gantry frame 201 is provided with a first driving mechanism to drive the first feeding mechanism to move. The first feeding mechanism is used to transfer the pedals on the pedal rack 202 to the pedal station 700. Specifically, the first feeding mechanism includes a second horizontal rail 203, a second slide 204, and a second vertical rail 205. The second slide 204 can move along the second horizontal rail 203, which extends along the transmission direction of the conveyor belt 100. The second vertical rail 205 is provided on the second slide 204 and can move up and down relative to the second slide 204. The second vertical rail 205 is provided with a vacuum suction cup. The pedals are picked up by the vacuum suction cup to avoid leaving scratches on the pedal surface.

[0019] The second slide block 204 is equipped with a third motor 206, and a third gear is connected to the third motor 206. The second horizontal rail 203 is equipped with a third rack that meshes with the third gear. The second slide block 204 is equipped with a fourth motor 207, and a fourth gear is connected to the fourth motor 207. The second vertical rail 205 is equipped with a fourth rack 208 that meshes with the fourth gear. The second horizontal rail 203 and the second vertical rail 205 are equipped with a second slide rail 209 that is slidably connected to the second slide block 204. The third motor 206 drives the third gear to rotate, causing the second slide block 204 to move along the second horizontal rail 203. The fourth motor 207 drives the fourth gear to rotate, causing the second vertical rail 205 to move up and down relative to the second slide block 204.

[0020] See Figure 3 The pedal mat feeding machine 300 includes a second gantry frame 301, a pedal mat stacking frame 302, and a second feeding mechanism. The second gantry frame spans above the conveyor belt, and the second feeding mechanism can move along the second gantry frame. The second gantry frame is provided with a second driving mechanism to drive the second feeding mechanism to move. The second feeding mechanism is used to transfer the pedal mats on the pedal mat stacking frame 302 to the pedals placed at the pedal station 700. The structure of the second feeding mechanism is the same as that of the first feeding mechanism, and will not be described again here.

[0021] See Figure 4 The pressing machine 400 includes a frame 401 and a pressing mechanism mounted on the frame. The number of pressing mechanisms corresponds to the number of pedal stations 700. The pressing mechanism includes a first cylinder 402 and a pressure plate 403. The first cylinder 402 is used to drive the pressure plate 403 to move up and down. The pressure plate 403 can press into the pedal station 700. By pressing the pedal station 700 with the pressure plate 403, the pedal pad and the pedal are assembled together. Specifically, a connecting hole is provided on the pedal, and a plug is provided on the pedal pad. The plug is pressed into the connecting hole by the pressure plate 403, thereby fixing the pedal pad on the pedal.

[0022] See Figure 5 The pipe threading machine 500 includes a third gantry frame 501, a pipe unloading mechanism 502, a third loading mechanism, and a pipe threading mechanism 503. The third gantry frame 501 is straddling the conveyor belt 100. The third loading mechanism can move along the third gantry frame 501. The third gantry frame 501 is provided with a third driving mechanism for driving the third loading mechanism to move. The third feeding mechanism is used to transfer the pipes on the pipe unloading mechanism 502 to the pipe threading mechanism 503. The pipe threading mechanism 503 is used to thread the pipes into the pedals placed at the pedal station 700.

[0023] See Figure 6The pipe fitting feeding mechanism 502 includes a pipe rack, a first linear guide rail 5022, and a pipe bucket 5023 mounted on the machine body 5021. The first linear guide rail 5022 is used to drive the pipe rack to move. The pipe rack has multiple pipe outlets 5024 spaced apart along its length. The pipe bucket 5023 has a feeding roller 5025 at its outlet. The feeding roller 5025 has a pipe groove for placing pipe fittings. The feeding roller 5025 can output one pipe fitting from the pipe bucket 5023 each time it rotates. The pipe outlets 5024 on the pipe rack are used to receive the pipe fittings output from the feeding roller 5025. Furthermore, the tube rack includes a base plate 5026 and an upper frame 5027. The upper frame 5027 and the base plate 5026 are connected by a slide rod 5028. The base plate 5026 is provided with a second cylinder 5029 for driving the upper frame 5027 to rise and fall. Side plates 5030 are provided on both sides of the upper frame 5027. The multiple tube outlets 5024 are provided on the side plates 5030. The tube bucket 5024 is located below the discharge roller 5025 and is provided with a receiving plate 5031. The receiving plate 5031 has a clearance position 5032 to avoid the side plates 5030.

[0024] The feeding roller 5025 rotates to output the pipe fitting, which falls to the bottom of the feeding plate 5031. The second cylinder 2029 first lowers the upper frame 5027, and the first linear guide rail 5022 drives the pipe rack to move so that the pipe outlet 2024 corresponds to the pipe fitting on the feeding plate 5031. Then, the second cylinder 2029 raises the upper frame 5027, so that the pipe fitting is removed from the feeding plate 5031. The first linear guide rail 5022 drives the pipe rack to move. After the pipe outlet 5024 leaves the receiving plate 5031, the second cylinder 2029 resets the pipe rack.

[0025] To prevent pipe shortage at the pipe outlet 2024, the pipe rack is equipped with a pipe fitting sensor 5033 on each pipe outlet 5024. When the pipe outlet 2024 receives material from the receiving plate 2031, if the pipe fitting sensor 5033 does not detect any pipe fitting, it will issue a pipe shortage alarm. The pipe fitting sensor 2033 can be an infrared sensor, a pressure sensor, etc.

[0026] See Figure 4 The lifting mechanism 800 includes a frame 801, a lifting plate 802, and a third cylinder 803. The third cylinder 803 is mounted on the frame 801, and its cylinder shaft is connected to the bottom of the lifting plate 802. A positioning part 804 is provided above the lifting plate 802, and a positioning hole 601 corresponding to the positioning part 804 is provided on the jig 700. When the third cylinder 803 is in operation, it lifts the jig 700 away from the conveyor belt 100.

[0027] See Figure 5 , 7The pipe-threading mechanism 503 described in section 8 is located above the conveyor belt 100. The pipe-threading mechanism 503 includes a fixed plate 5034, a movable plate 5035, and a second linear guide rail 5036. The second linear guide rail 5036 is mounted on the fixed plate 5034. The movable plate 5035 is slidably connected to the fixed plate 5034 and driven by the second linear guide rail 5036. The movable plate 5035 is provided with a number of first pneumatic grippers 5037 that are the same as the number of pedal stations 700. The first pneumatic grippers 5037 are used to clamp the pipe. The pipe is clamped by the first pneumatic grippers 5037, and then the first pneumatic grippers 5037 are moved horizontally by the second linear guide rail 5036 to thread the pipe into the pedal.

[0028] See Figure 5 and 7 The third feeding mechanism includes a first horizontal rail 504, a first slide block 505, and a first vertical rail 506. The first horizontal rail 504 is slidably connected to the third gantry frame 501. The first slide block 505 can move along the first horizontal rail 504. The first horizontal rail 504 extends along the transmission direction of the conveyor belt 100. The first vertical rail 506 is provided on the first slide block 505 and can move up and down relative to the first slide block 505. The first vertical rail 506 is provided with a second pneumatic gripper 507 for clamping pipe fittings. The second pneumatic gripper 507 clamps the pipe fittings from the pipe rack and then transports them between the pipe threading mechanism 503 and the jig 600. After the first pneumatic gripper 5037 clamps the pipe fittings, the second pneumatic gripper 507 releases them.

[0029] See Figure 5 The first slide block 505 is equipped with a first motor 508, and a first gear is connected to the first motor 508. A first rack that meshes with the first gear is provided on the first horizontal rail 504. The first slide block 505 is equipped with a second motor 509, and a second gear is connected to the second motor 509. A second rack 510 that meshes with the second gear is provided on the first vertical rail 506. The first horizontal rail 504 and the first vertical rail 506 are equipped with a first slide rail 511 that is slidably connected to the first slide block 505. The first motor 508 drives the first gear to rotate, causing the first slide block 505 to move along the first horizontal rail 504. The second motor 509 drives the second gear to rotate, causing the first vertical rail 506 to move up and down relative to the first slide block 505.

[0030] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A square tube ladder step assembly production line characterized by: The device comprises a pedal loading machine (200), a pedal pad loading machine (300), a pressing machine (400) and a pipe penetrating machine (500) distributed along the conveying direction of a conveying belt (100), the conveying belt (100) is provided with a jig (600) moving along the conveying belt, the jig (600) is provided with a plurality of pedal workstations (700), and the conveying belt (100) is provided with a lifting mechanism (800) corresponding to the positions of the pedal loading machine (200), the pedal pad loading machine (300), the pressing machine (400) and the pipe penetrating machine (500), and the lifting mechanism (800) is used for lifting the jig (600); The pedal loading machine (200) comprises a first gantry (201), a pedal stacking frame (202) and a first loading mechanism, the first gantry (201) is arranged above the conveying belt (100), the first loading mechanism is movable along the first gantry (201), the first gantry (201) is provided with a first driving mechanism for driving the first loading mechanism to move, and the first loading mechanism is used for transferring pedals on the pedal stacking frame (202) to the pedal workstations (700); The pedal pad loading machine (300) comprises a second gantry (301), a pedal pad stacking frame (302) and a second loading mechanism, the second gantry is arranged above the conveying belt, the second loading mechanism is movable along the second gantry, the second gantry is provided with a second driving mechanism for driving the second loading mechanism to move, and the second loading mechanism is used for transferring pedal pads on the pedal pad stacking frame (302) to pedals placed on the pedal workstations (700); The pressing machine (400) comprises a frame body (401) and a pressing mechanism arranged on the frame body, the number of the pressing mechanism corresponds to the number of the pedal workstations (700), the pressing mechanism comprises a first cylinder (402) and a pressing plate (403), the first cylinder (402) is used for driving the pressing plate (403) to move up and down, and the pressing plate (403) can be pressed into the pedal workstations (700); The pipe penetrating machine (500) comprises a third gantry (501), a pipe unloading mechanism (502), a third loading mechanism and a pipe penetrating mechanism (503), the third gantry (501) is arranged above the conveying belt (100), the third loading mechanism is movable along the third gantry (501), the third gantry (501) is provided with a third driving mechanism for driving the third loading mechanism to move, the third loading mechanism is used for transferring pipes on the pipe unloading mechanism (502) to the pipe penetrating mechanism (503), and the pipe penetrating mechanism (503) is used for penetrating the pipes into pedals placed on the pedal workstations (700).

2. The square tube ladder step assembly production line according to claim 1, characterized in that: The pipe fitting feeding mechanism (502) includes a pipe rack, a first linear guide rail (5022), and a pipe bucket (5023) mounted on the machine body (5021). The first linear guide rail (5022) is used to drive the pipe rack to move. The pipe rack has multiple pipe outlets (5024) spaced apart along its length. The pipe bucket (5023) has a feeding roller (5025) at its outlet. The feeding roller (5025) has a pipe groove for placing pipe fittings. The feeding roller (5025) can output one pipe fitting from the pipe bucket (5023) each time it rotates. The pipe outlets (5024) on the pipe rack are used to receive the pipe fittings output from the feeding roller (5025).

3. A square tube ladder step assembly production line according to claim 2, wherein: The tube rack includes a base plate (5026) and an upper frame (5027). The upper frame (5027) and the base plate (5026) are connected by a slide rod (5028). The base plate (5026) is provided with a second cylinder (5029) to drive the upper frame (5027) to rise and fall. The upper frame (5027) is provided with side plates (5030) on both sides. The multiple tube outlets (5024) are provided on the side plates (5030). The tube bucket (5024) is located below the feeding roller (5025) and is provided with a receiving plate (5031). The receiving plate (5031) has a clearance space (5032) to avoid the side plates (5030).

4. A square tube ladder step assembly production line according to claim 2 or 3, characterized in that: The pipe rack is equipped with a pipe fitting sensor (5033) on each pipe outlet (5024).

5. The square tube ladder step assembly production line of claim 1, wherein: The lifting mechanism (800) includes a frame (801), a lifting plate (802), and a third cylinder (803). The third cylinder (803) is mounted on the frame (801), and the cylinder shaft of the third cylinder (803) is connected to the bottom of the lifting plate (802). A positioning part (804) is provided above the lifting plate (802), and a positioning hole (601) corresponding to the positioning part (804) is provided on the fixture (600).

6. The square tube ladder step assembly production line according to claim 1 or 2 or 3 or 5, characterized in that: The tube threading mechanism (503) is located above the conveyor belt (100). The tube threading mechanism (503) includes a fixed plate (5034), a movable plate (5035), and a second linear guide rail (5036). The second linear guide rail (5036) is mounted on the fixed plate (5034). The movable plate (5035) is slidably connected to the fixed plate (5034) and driven by the second linear guide rail (5036). The movable plate (5035) is provided with a number of first pneumatic grippers (5037) that are the same as the number of pedal stations (700). The first pneumatic grippers (5037) are used to clamp the tubes.

7. A square tube ladder step assembly production line as claimed in claim 6, wherein: The third feeding mechanism includes a first horizontal rail (504), a first slide (505) and a first vertical rail (506). The first horizontal rail (504) is slidably connected to the third gantry (501). The first slide (505) can move along the first horizontal rail (504). The first horizontal rail (504) extends along the transmission direction of the conveyor belt (100). The first vertical rail (506) is provided on the first slide (505) and can move up and down relative to the first slide (505). The first vertical rail (506) is provided with a second pneumatic gripper (507) for clamping pipe fittings.

8. A square tube ladder step assembly production line as claimed in claim 7, characterized in that: The first slide (505) is provided with a first motor (508), the first motor (508) is connected to a first gear, and the first horizontal rail (504) is provided with a first rack that meshes with the first gear; the first slide (505) is provided with a second motor (509), the second motor (509) is connected to a second gear, the first vertical rail (506) is provided with a second rack (510) that meshes with the second gear, and the first horizontal rail (504) and the first vertical rail (506) are provided with a first slide rail (511) that is slidably connected to the first slide (505).

9. The square tube ladder step assembly production line of claim 6, wherein: The first feeding mechanism includes a second horizontal rail (203), a second slide (204), and a second vertical rail (205). The second slide (204) can move along the second horizontal rail (203). The second horizontal rail (203) extends along the transmission direction of the conveyor belt (100). The second vertical rail (205) is located on the second slide (204) and can move up and down relative to the second slide (204). The second vertical rail (205) is equipped with a vacuum suction cup.

10. The square tube ladder step assembly production line of claim 9, wherein: The second slide (204) is provided with a third motor (206), the third motor (206) is connected to a third gear, the second horizontal rail (203) is provided with a third rack that meshes with the third gear, the second slide (204) is provided with a fourth motor (207), the fourth motor (207) is connected to a fourth gear, the second vertical rail (205) is provided with a fourth rack (208) that meshes with the fourth gear, and the second horizontal rail (203) and the second vertical rail (205) are provided with a second slide rail (209) that is slidably connected to the second slide (204).

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