A tray stacking machine

Abstract

The utility model provides a tray stacker, aims at solving the low safety factor and low efficiency of manual operation tray stacking work of prior art. The utility model mainly includes stacker frame, spacing frame, horizontal fork taking mechanism and conveying line, the utility model discloses the synergistic effect of lifting mechanism and horizontal fork taking mechanism realizes the automatic lifting, fork taking and stacking of tray, reduces manual intervention, improves operation efficiency. The spacing frame restricts the tray stacking position, prevents toppling, and the lifting support adopts chain transmission and composite roller bearing guidance, runs stably, ensures the safety and reliability of multilayer tray stacking. At the same time, mechanical automation replaces the traditional manual stacking mode, avoids the risk of aerial work, especially suitable for large quantities or heavy tray stacking, significantly improves the operation safety factor. The overall structure is stable and efficient, reduces the labor cost and operation difficulty, and is suitable for logistics, storage and other fields.

Description

Technical Field

[0001] This utility model relates to the field of pallet storage technology, and in particular to a pallet stacking machine. Background Technology

[0002] Pallet stacking (i.e., placing multiple pallets vertically together) is a common practice in logistics, warehousing, and transportation. Stacking pallets can make full use of the vertical space of a warehouse, reduce floor space, and maximize warehouse utilization, especially in situations where land prices are high or storage space is limited. Counting and managing stacked pallets is also more efficient.

[0003] The existing pallet stacking technology first requires forklift transportation, then manual operation of the forklift to lift the pallets, and requires a dedicated person to adjust the posture of the stacked pallets to prevent them from tipping over. At the same time, the more pallets are stacked, the lower the safety factor of the stacking operation and the higher the difficulty, thus bringing many inconveniences. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing a pallet stacking machine that, through the coordinated action of a lifting mechanism and a lateral forklift mechanism, achieves automatic lifting, forklifting, and stacking of pallets, reducing manual intervention and improving operational efficiency.

[0005] The technical solution adopted in this utility model is as follows: A pallet stacking machine includes a stacking frame, a limiting frame for vertically stacking pallets is provided at the center of the stacking frame, and lifting mechanisms for lifting pallets are provided at both ends of the stacking frame. The working end of each lifting mechanism is a set of transverse fork-taking mechanisms. Two sets of conveyor lines are fixed at the lower part of the limiting frame, and the conveying direction of the conveyor lines is perpendicular to the fork-taking direction of the transverse fork-taking mechanisms.

[0006] Furthermore, the lifting mechanism includes two sets of driven sprockets disposed at the top of the stacking frame, two sets of coaxial driven sprockets disposed at the bottom of the stacking frame, and a lifting bracket disposed in the hollow part inside the stacking frame. A first reduction motor is also disposed at the bottom of the stacking frame. The drive end of the first reduction motor is provided with a drive sprocket. The drive sprocket and each driven sprocket are connected by a chain drive to form a closed-loop transmission chain. The lifting bracket is fixed on the chain and moves up and down with the lifting of the chain.

[0007] Furthermore, chain tensioners are provided at both ends of the lifting bracket, and the lifting bracket is connected to the sprocket and chain drive through the chain tensioners.

[0008] Furthermore, the drive end of the first geared motor outputs torque through the transmission shaft, and the bottom ends of the stacking frame are provided with bearing seats, and the bearing seats are provided with symmetrical drive sprockets, which are coaxially mounted on the transmission shaft.

[0009] Furthermore, composite roller bearings are provided at both ends of the lifting bracket, and guide rails are provided on the profiles on both sides of the stacking frame. The composite roller bearings are slidably guided in the guide rails through the sliding bushings of their bodies.

[0010] Furthermore, the lateral forking mechanism includes a motor mounting plate fixed to the top of the lifting bracket. A fork tooth plate is slidably disposed on the upper surface of the motor mounting plate. The motor mounting plate and the fork tooth plate are slidably connected by a guide mechanism. A second reduction motor is fixedly disposed below the center of the motor mounting plate. A cam is disposed at the drive end of the second reduction motor. A groove is disposed at the center of the fork tooth plate. The cam rolls and contacts the inner wall of the groove through a cam bearing follower.

[0011] The advantages of this utility model over the prior art are as follows: 1) High degree of automation and reduced manual intervention: This utility model realizes automatic lifting, picking and stacking of pallets through the coordinated action of the lifting mechanism and the lateral forklift mechanism, without relying on manual operation of forklifts or adjustment of pallet posture, which significantly reduces labor costs and improves work efficiency. 2) Stable structure and high stacking safety: The limiting frame can effectively constrain the stacking position of pallets and prevent them from tipping over; the lifting bracket adopts chain drive and composite roller bearing guidance, which can run smoothly and accurately control the lifting process of pallets, ensuring the safety and reliability of the stacking process, especially suitable for multi-layer pallet stacking operations. 3) Reduced operational difficulty and risk: By replacing traditional manual stacking methods with mechanical automation, the risks of high-altitude operations by manual operation of forklifts are avoided. This is especially suitable for stacking large quantities or heavy pallets, and significantly improves the safety factor of operations. Attached Figure Description

[0012] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the lifting mechanism in this utility model; Figure 4 This is a schematic diagram of the transverse forking mechanism in this utility model.

[0013] in: 1. Stacking rack; 101. Limiting frame; 102. Conveyor line; 2. Lifting mechanism; 21. Driven sprocket; 22. Lifting bracket; 23. Chain tensioner; 24. First reduction motor; 25. Drive sprocket. 3. Lateral fork mechanism; 31. Motor mounting plate; 32. Fork tooth plate; 33. Guide mechanism; 34. Second geared motor; 35. Cam; 36. Cam bearing follower. Detailed Implementation

[0014] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0015] like Figures 1 to 4 As shown, this utility model provides a pallet stacking machine, which includes a stacking frame 1. A limiting frame 101 for vertically stacking pallets is provided at the center of the stacking frame 1. Lifting mechanisms 2 for lifting pallets are provided at both ends of the stacking frame 1. The working end of each lifting mechanism 2 is a set of transverse fork-taking mechanisms 3. Two sets of conveyor lines 102 are fixed at the lower part of the limiting frame 101. The conveying direction of the conveyor lines 102 is perpendicular to the fork-taking direction of the transverse fork-taking mechanisms 3.

[0016] In one embodiment of this utility model, the lifting mechanism 2 includes two sets of driven sprockets 21 disposed on the top of the stacking frame 1, two sets of coaxial driven sprockets 21 disposed on the bottom of the stacking frame 1, and a lifting bracket 22 disposed in the hollow part inside the stacking frame 1. A first reduction motor 24 is also disposed on the bottom of the stacking frame 1. The driving end of the first reduction motor 24 is provided with a driving sprocket 25. The driving sprocket 25 and each driven sprocket 21 are connected by a chain drive to form a closed-loop transmission chain. The lifting bracket 22 is fixed on the chain and moves up and down with the lifting of the chain.

[0017] In one embodiment of this utility model, chain tensioners 23 are provided at both ends of the lifting bracket 22, and the lifting bracket 22 is connected to the sprocket and chain drive through the chain tensioners 23.

[0018] In one embodiment of this utility model, the drive end of the first reduction motor 24 outputs torque through the transmission shaft, and the bottom ends of the stacking frame 1 are provided with bearing seats, and the bearing seats are provided with symmetrical drive sprockets 25, which are coaxially arranged on the transmission shaft.

[0019] In one embodiment of this utility model, composite roller bearings are provided at both ends of the lifting bracket 22, and guide rails are provided on the profiles on both sides of the stacking frame 1. The composite roller bearings are slidably guided in the guide rails by the sliding bushings of their bodies.

[0020] In one embodiment of this utility model, the transverse forking mechanism 3 includes a motor mounting plate 31 fixed to the top of the lifting bracket 22. A fork tooth plate 32 is slidably disposed on the upper surface of the motor mounting plate 31. The motor mounting plate 31 and the fork tooth plate 32 are slidably connected by a guide mechanism 33. A second reduction motor 34 is fixedly disposed below the center of the motor mounting plate 31. A cam 35 is disposed at the driving end of the second reduction motor 34. A groove is disposed at the center of the fork tooth plate 32. The cam 35 rolls against the inner wall of the groove through a cam bearing follower 36.

[0021] The specific structure and working principle of this utility model are as follows: Including a three-dimensional positioning system: The stacking rack 1 has a limiting frame 101 at its center, and its inner cavity size is 5-10mm larger than that of a standard pallet. Two roller conveyor lines 102 are symmetrically arranged at the bottom, with the X-axis of the conveying direction and the Y-axis of the picking direction forming a 90° orthogonal coordinate system; Dual-drive lifting system with closed-loop chain drive structure: The top driven sprocket 21 and the bottom coaxial driven sprocket 21 form a vertical transmission chain; The first geared motor 24 synchronously drives the two drive sprockets 25 through the transmission shaft; The lifting bracket 22 is fixed to the chain link plate by high-strength bolts; Dynamic compensation: The chain tensioner 23 adopts a spring-screw composite structure, and the preload is adjustable from 50 to 200 N.

[0022] The polyurethane bushing of the composite roller bearing forms a sliding pair with the hard chrome plated guide rail.

[0023] Motion conversion of the cam 35 fork mechanism: The second reduction motor 34 drives the disc cam 35 with an eccentricity e=15mm, and the cam 35 bearing follower forms line contact with the trapezoidal groove of the fork plate 32.

[0024] Fork plate guide: A linear guide rail and a slider guide the fork plate 32 to slide.

[0025] Optionally, the extended scheme of this utility model also includes: a nylon anti-collision strip is embedded in the inner wall of the limiting frame 101, a photoelectric sensor is configured on the conveyor line 102 to realize the pallet positioning detection, and the contour curve of the cam 35 adopts a modified sine motion law.

[0026] The working principle of this utility model: 1. Feeding stage: The pallet is fed into the limiting frame 101 via the conveyor line 102. The photoelectric sensor triggers the PLC control system, thereby controlling the two geared motors.

[0027] 2. Forklift stage: The lifting bracket 22 descends to the pallet plane, the second reduction motor 34 is activated, and the fork teeth are pushed out through the cam 35 to lift the lower surface of the pallet.

[0028] 3. Lifting stage: The first reduction motor 24 drives the chain to rise, which in turn lifts the pallet.

[0029] 4. Stacking stage: After reaching the target height, the fork teeth retract and the pallet slides into the stacking station along the anti-collision strip.

[0030] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A pallet stacking machine characterized by: The system includes a stacking rack (1), with a limiting frame (101) at the center for vertically stacking pallets. Both ends of the stacking rack (1) are provided with lifting mechanisms (2) for lifting pallets. The working end of each lifting mechanism (2) is a set of transverse forklift mechanisms (3). Two sets of conveyor lines (102) are fixed at the lower part of the limiting frame (101). The conveying direction of the conveyor lines (102) is perpendicular to the forklift direction of the transverse forklift mechanisms (3).

2. The pallet stacking machine as described in claim 1, characterized in that: The lifting mechanism (2) includes two sets of driven sprockets (21) set on the top of the stacking frame (1), two sets of coaxial driven sprockets (21) set at the bottom of the stacking frame (1), and a lifting bracket (22) set in the hollow part inside the stacking frame (1). The bottom of the stacking frame (1) is also provided with a first reduction motor (24). The drive end of the first reduction motor (24) is provided with a drive sprocket (25). The drive sprocket (25) and each driven sprocket (21) are connected by a chain drive to form a closed-loop transmission chain. The lifting bracket (22) is fixed on the chain and moves up and down with the lifting of the chain.

3. The tray stacking machine of claim 2, wherein: The lifting bracket (22) is provided with chain tensioners (23) at both ends, and the lifting bracket (22) is connected to the sprocket and chain drive through the chain tensioners (23).

4. The pallet stacker of claim 2, wherein: The drive end of the first geared motor (24) outputs torque through the transmission shaft. The bottom ends of the stacking frame (1) are provided with bearing seats, and the bearing seats are provided with symmetrical drive sprockets (25). The drive sprockets (25) are coaxially arranged on the transmission shaft.

5. The tray stacking machine of claim 2, wherein: The lifting bracket (22) is provided with composite roller bearings at both ends, and guide rails are provided on the profiles on both sides of the stacking frame (1). The composite roller bearings are slidably guided in the guide rails by the sliding bushings of their bodies.

6. The tray stacking machine of claim 2, wherein: The transverse forking mechanism (3) includes a motor mounting plate (31) fixed on the top of the lifting bracket (22). A fork plate (32) is slidably provided on the upper surface of the motor mounting plate (31). The motor mounting plate (31) and the fork plate (32) are slidably connected by a guide mechanism (33). A second reduction motor (34) is fixedly provided below the center of the motor mounting plate (31). A cam (35) is provided at the driving end of the second reduction motor (34). A groove is provided at the center of the fork plate (32). The cam (35) rolls against the inner wall of the groove through a cam bearing follower (36).

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