Stacking machine cargo carrying table anti-falling device, stacking machine cargo carrying table and stacking machine thereof

Abstract

The utility model discloses a stacking machine cargo carrying table anti-falling device, a stacking machine cargo carrying table and a stacking machine, and belongs to the technical field of stacking machines. The safety device overcomes the defect that in the prior art, a safety device on a traditional stacking machine is prone to failure, and consequently a cargo carrying table falls. The main body structure of the stacking machine comprises the stacking machine, two or more layers of cargo carrying tables are arranged on the stacking machine, a stacking machine cargo carrying table anti-falling device is arranged on at least one layer of cargo carrying table, and the stacking machine cargo carrying table anti-falling device comprises locking mechanisms which are arranged on the two sides of the cargo carrying tables and used for locking falling of the cargo carrying tables. The two locking mechanisms are connected through a torsion bar; the speed governor, the steel wire rope and the tensioning wheel are arranged on one side of the cargo carrying table, the upper end and the lower end of the steel wire rope are wound around the tensioning wheel and the speed governor respectively, and two connectors of the steel wire rope are fixedly installed on the cargo carrying table. The utility model is mainly used on the stacker.

Description

Technical Field

[0001] The utility model belongs to the technical field of stackers, and in particular relates to a stacker cargo platform anti-falling device, a stacker cargo platform and a stacker. Background Art

[0002] A stacker is a special crane that uses a fork or a string as a picking device to grab, transport and stack or pick up and place unit goods from high-rise shelves in warehouses, workshops, etc. It is a type of storage equipment. It is responsible for stacking goods in the warehouse, and the operating efficiency of the stacker directly affects the operating efficiency of the entire warehouse system. In the context of Industry 4.0 and intelligent manufacturing, the stacker is mainly responsible for the tasks of outbound and inbound storage in warehousing logistics. Technical optimization and structural design can improve its operating efficiency, thereby improving the work efficiency of the entire automated warehouse.

[0003] At present, the commonly used safety devices on the aisle stacker mainly include loose rope, broken rope protection device, overload protection device, hoist line limit switch and mechanical buffer device, operation limit switch and mechanical buffer block, manual emergency stop button, etc. The anti-fall protection on the existing stacker loading platform usually adopts a sensor to detect the tension state of the wire rope, which is used to send an abnormal signal to the control unit when the wire rope is abnormal. The control unit responds, cuts off the power to the lifting motor, starts the brake of the loading platform, and fixes the loading platform in a safe position. However, this protection measure using electrical components is subject to the working state of the electrical components. If the electrical components are damaged, the protection device will fail, and there are certain safety hazards.

[0004] The stacker is mainly composed of a walking mechanism, a lifting mechanism, a fork mechanism, a positioning system and a mechanical structure system. According to the structure of the stacker column, it can be divided into two different types: single-column and double-column. The double-column stacker includes three modules: an upper beam, a lower beam and a column, and the structure is a square frame. This type of mechanical structure has the characteristics of high rigidity and high stability, and can reach a large range of heights for picking up goods. It is often used in high-rise warehouses with large weights and high operating speeds. The single-column stacker has only one lower beam and eliminates the upper beam. The structure is "L" or "H". This type of stacker structure requires less material during the manufacturing process, which effectively reduces the weight and cost of the stacker. However, it is easy to have problems with center of gravity offset during use, which affects the stability of its operation. Therefore, it is generally used in high-rise warehouses with low weight and low operating speeds.

[0005] At present, stackers usually use a single loading platform and a single fork. When storing and retrieving goods, they can only store and retrieve goods from one storage location at a time. After transporting it to the storage and retrieval port, the next cargo can be transported. In this process, most of the time is spent on the stacker walking in the lane, while the time for storing and retrieving goods is very short. Therefore, most of the time is wasted during the operation of the stacker, and during the busy peak period when frequent storage and retrieval are required, the working efficiency of a single fork is low. Although the existing horizontally arranged double-fork loading platform has two forks at the same time, it has certain requirements for the width of the loading platform. The loading platform needs to have sufficient horizontal space to place the forks, and relatively speaking, the length and material of the upper and lower beams will be increased, which increases the cost. For a higher vertical warehouse, the working stroke is more longitudinal, and the horizontally arranged double-fork loading platform obviously cannot give full play to its advantages. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a stacker cargo platform anti-falling device, a stacker cargo platform and a stacker.

[0007] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0008] A stacker cargo platform anti-falling device comprises locking mechanisms arranged on both sides of the cargo platform for locking the cargo platform from falling, and the two locking mechanisms are connected by a torsion bar;

[0009] The speed limiter, wire rope and tension wheel are arranged on one side of the cargo platform. The upper and lower ends of the wire rope are respectively passed around the tension wheel and the speed limiter, and the two interfaces of the wire rope are installed and fixed on the cargo platform.

[0010] Preferably, the locking mechanism comprises a connecting rod and a safety clamp, one end of the connecting rod is connected to the torsion bar, and the other end is connected to the safety clamp upper wedge on the safety clamp, and the safety clamp is installed on the cargo platform.

[0011] Preferably, a torsion spring is disposed at each end of the torsion bar.

[0012] A stacker cargo platform is provided with a stacker cargo platform anti-falling device as described in any one of the above items.

[0013] A stacker is provided with two or more layers of cargo platforms, and at least one of the layers of cargo platforms is provided with the stacker cargo platform anti-falling device as described above.

[0014] Preferably, columns are provided on both sides of the stacker, guide rails are provided on the columns, and the guide rails pass through the jaws on the safety clamp. When the safety clamp is working, the jaws on the safety clamp clamp the guide rails.

[0015] Preferably, the tensioner is mounted on the upper end of the column.

[0016] Preferably, guide wheels for cooperating with guide rails are provided on both sides of the cargo platform.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The stacker platform anti-fall device can cut off the power supply and perform emergency braking through the mechanical structure when the stacker platform is out of control. During use, the tension wheel needs to tighten the wire rope so that the speed limiter can detect the overspeed of the platform in time during operation;

[0019] 2. When the cargo platform is in normal lifting and lowering state, the torsion bar connecting the two connecting rods is controlled by the torsion springs on both sides. The existence of the torsion spring will apply a torque to the torsion bar, so that the torsion bar will not accidentally drive the connecting rod to lock the cargo platform due to vibration during operation; in the case of overspeed, the wire rope will pull the connecting rod to overcome the reset torque generated by the torsion spring, pull up the connecting rod on one side, and the connecting rod drives the connecting rod on the other side through the torsion bar, so that the safety clamps on both sides of the cargo platform work, and the jaws on the safety clamps clamp the guide rails and lock the cargo platform, which greatly improves the reliability of the anti-fall protection of the cargo platform;

[0020] 3. The multi-layer fork loading platform increases the loading platform by at least one layer, forming a longitudinal multi-fork loading platform. Each fork can independently operate the storage and retrieval of goods, solving the problem of insufficient work efficiency during the peak period of storage and retrieval of goods. By reducing the work trip and improving the work efficiency, time cost and labor cost are saved;

[0021] 4. The two bottom frames maintain a certain degree of parallelism to ensure that both forks can operate smoothly and normally. The two bottom frames have a certain rigidity to ensure that they can withstand the goods within the rated load. When the carrying capacity of the upper and lower forks is different, the forks with larger carrying capacity should be installed on the bottom frame to ensure that the center of gravity of the cargo platform is stable when the two forks are fully loaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a stacker loading platform and a stacker loading platform anti-falling device in the utility model;

[0023] Figure 2 It is a structural schematic diagram of the cargo platform of the stacker in the utility model;

[0024] Figure 3 It is a side view of the cargo platform of the stacker in the utility model;

[0025] Figure 4 This is a schematic diagram of the installation structure of the tensioner in the utility model;

[0026] Figure 5 This is a schematic diagram of the installation structure of the cargo platform of the stacker in the utility model;

[0027] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0028] Figure 7 This is a front view of the double-layer cargo platform in the utility model;

[0029] Figure 8 It is a left view of the double-layer cargo platform in the utility model.

[0030] In the figure: 1. speed limiter; 2. wire rope; 3. connecting rod; 4. torsion spring; 5. torsion bar; 6. safety clamp; 7. upper wedge of safety clamp; 8. tensioning wheel; 9. cargo platform; 10. column; 11. guide rail; 12. upper fork; 13. lower fork; 14. guide wheel; 15. upper photoelectric bracket; 16. lower photoelectric bracket; 17. lifting top wheel. DETAILED DESCRIPTION

[0031] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] like Figure 1-6 As shown, a stacker cargo platform anti-falling device includes locking mechanisms arranged on both sides of the cargo platform 9 for locking the cargo platform 9 from falling, the two locking mechanisms are connected by a torsion bar 5, and a torsion spring 4 is arranged at each end of the torsion bar 5;

[0034] The speed limiter 1, wire rope 2 and tension pulley 8 are arranged on one side of the cargo platform 9. The upper and lower ends of the wire rope 2 are respectively passed around the tension pulley 8 and the speed limiter 1, and the two interfaces of the wire rope 2 are installed and fixed on the cargo platform 9. When the cargo platform 9 runs at 115% of the rated speed, the speed limiter 1 will be triggered to control the safety clamp 6 to clamp the guide rail 11 on the column 10, thereby achieving the effect of emergency braking.

[0035] The locking mechanism includes a connecting rod 3 and a safety clamp 6 , one end of the connecting rod 3 is connected to the torsion bar 5 , and the other end is connected to a safety clamp upper wedge 7 on the safety clamp 6 , and the safety clamp 6 is installed on the cargo platform 9 .

[0036] The working principle of this embodiment is:

[0037] When the stacker is operating normally, the speed limiter 1 will rotate with the steel wire rope 2 connected to the cargo platform 9. When the cargo platform 9 moves at a speed exceeding 115% of the rated speed, the electrical components will first detect the overspeed and then send a signal to the control system. The control system will then send a signal to cut off the power supply of the lifting motor and lock it. This is the first level of protection. If the cargo platform 9 is not braked successfully at this step, the steel wire rope 2 will continue to move with the cargo platform 9, driving the speed limiter 1 to rotate at high speed. At this time, the mechanical structure of the speed limiter 1 will take effect, and the pressure block of the speed limiter 1 will clamp the steel wire rope 2, thereby driving the connecting rod 3. The connecting rod 3 pushes the safety clamp upper wedge 7 in the middle of the safety clamp 6 upward, so that the safety clamp upper wedge 7 and the column 10 form a self-locking, fixing the cargo platform 9 in a safe position on the guide rail 11. When the cargo platform 9 is lifted and lowered normally, The torsion bar 5 connecting the two connecting rods 3 is controlled by the torsion springs 4 on both sides. The existence of the torsion spring 4 will apply a torque to the torsion bar 5, so that the torsion bar 5 will not accidentally drive the connecting rod 3 to lock the cargo platform 9 due to vibration during operation; in the case of overspeed, the wire rope 2 will pull the connecting rod 3, overcome the reset torque generated by the torsion spring 4, and pull up the connecting rod 3 on one side. The connecting rod 3 drives the connecting rod 3 on the other side through the torsion bar 5, thereby making the safety clamps 6 on both sides of the cargo platform work, and the jaws on the safety clamps 6 clamp the guide rails 11 to lock the cargo platform 9.

[0038] Embodiment 2:

[0039] like Figure 2 and 5 As shown, a stacker cargo platform is provided with a stacker cargo platform anti-falling device as described in Example 1; and in the embodiment, the cargo forks are placed longitudinally, which can avoid the problems of lateral widening of the cargo platform 9 and increased material consumption of the upper and lower beams caused by the transverse arrangement, reduce the manufacturing cost, and when there are many storage locations and the height of the vertical warehouse is high, the working stroke of the cargo platform 9 moving up and down can be shortened, the operating time can be reduced, and the work efficiency can be improved.

[0040] Embodiment 3:

[0041] like Figure 7-8 As shown, a stacker is provided with two or more layers of cargo platforms 9, and at least one of the layers of cargo platforms 9 is provided with the stacker cargo platform anti-falling device as described in Example 1. The cargo platform 9 of this embodiment is a stacker cargo platform on which two sets of independent forks are installed, which can fork two pallets in sequence, shorten the longitudinal working stroke of the cargo platform 9, improve the stacker storage and retrieval efficiency, and improve the operation speed and productivity of the goods.

[0042] It should be noted that the height of the goods should be taken into consideration when designing the spacing between the two layers, and a reserve should be made during the design to ensure that the goods will not interfere with the cargo platform when being stored or retrieved.

[0043] Furthermore, columns 10 are provided on both sides of the stacker, and guide rails 11 are provided on the columns 10 . The guide rails 11 pass through the jaws on the safety clamp 6 . When the safety clamp 6 is working, the jaws on the safety clamp 6 clamp the guide rails 11 .

[0044] Furthermore, the tensioner 8 is installed at the upper end of the column 10 .

[0045] Furthermore, guide wheels 14 for cooperating with the guide rails 11 are provided on both sides of the cargo platform 9 .

[0046] The working principle of this embodiment is:

[0047] The longitudinal double-fork cargo platform is composed of an integral welded frame as the skeleton, which is divided into two layers, the upper layer is equipped with an upper fork 12 and an upper photoelectric bracket 15, and the lower layer is equipped with a lower fork 13 and a lower photoelectric bracket 16. The photoelectric switches on each photoelectric bracket are used to detect different working states, so that the two forks can work independently. Guide wheels 14 are respectively installed on both sides of the welded frame, and their function is to make the cargo platform 9 move up and down along the guide rail 11; lifting top wheels 17 are also installed on both sides of the frame to support the guide rail 11 to prevent the lateral shaking of the cargo platform 9. The safety clamp 6 is installed on one side of the cargo platform 9, and is used to quickly lock the cargo platform 9 in case of abnormal conditions, such as failure of the lifting mechanism of the cargo platform 9 or other dangerous conditions that may cause the cargo to fall, to prevent the cargo from falling and ensure the safety of personnel and equipment. The working principle of the safety clamp 6 is to monitor the operating status of the cargo platform 9 in real time through sensors installed on the cargo platform 9 or the column 10. Once an abnormal situation occurs, the sensor will immediately transmit a signal to the control system. The control system that receives the abnormal signal will immediately activate the safety clamp mechanism. After the safety clamp 6 is activated, the jaws inside it will tightly clamp the guide rails 11 of the cargo platform 9, so that the cargo platform 9 is locked by the safety clamp 6 to prevent it from falling. In addition, the longitudinal double-fork cargo platform should leave sufficient space between the two bottom frames to ensure that the lower fork 13 will not interfere with the frame when storing and retrieving goods.

[0048] The two independent forks on the double-layer loading platform can work independently of each other, so that the stacker can operate to store and retrieve two pallets in sequence, improving operating efficiency. By reducing the number of operations and improving operating efficiency, it can effectively reduce labor costs and time costs.

Claims

1. A stacker cargo platform anti-falling device, characterized in that: It comprises locking mechanisms arranged on both sides of the cargo platform (9) for locking the cargo platform (9) from falling, and the two locking mechanisms are connected via a torsion bar (5); A speed limiter (1), a steel wire rope (2) and a tension wheel (8) are arranged on one side of a cargo platform (9); the upper and lower ends of the steel wire rope (2) are respectively passed around the tension wheel (8) and the speed limiter (1); and two interfaces of the steel wire rope (2) are fixedly mounted on the cargo platform (9).

2. The stacker cargo platform anti-falling device according to claim 1, characterized in that: The locking mechanism comprises a connecting rod (3) and a safety clamp (6), one end of the connecting rod (3) is connected to the torsion bar (5), and the other end is connected to a safety clamp upper wedge (7) on the safety clamp (6), and the safety clamp (6) is installed on the cargo platform (9).

3. The stacker cargo platform anti-falling device according to claim 2, characterized in that: A torsion spring (4) is provided at each end of the torsion bar (5).

4. A stacker cargo platform, characterized in that: The stacker loading platform is provided with a stacker loading platform anti-falling device as described in any one of claims 1 to 3.

5. A stacker, characterized in that: The stacker is provided with two or more layers of cargo platforms (9), and at least one of the layers of cargo platforms (9) is provided with the stacker cargo platform anti-falling device as claimed in claim 2 or 3.

6. The stacker according to claim 5, characterized in that: The stacker is provided with columns (10) on both sides, and guide rails (11) are provided on the columns (10). The guide rails (11) pass through the jaws on the safety clamp (6). When the safety clamp (6) is working, the jaws on the safety clamp (6) clamp the guide rails (11).

7. The stacker according to claim 6, characterized in that: The tension wheel (8) is installed on the upper end of the column (10).

8. The stacker according to claim 6, characterized in that: Guide wheels (14) for use with the guide rails (11) are arranged on both sides of the cargo platform (9).

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