Double-station elevator

Abstract

The double-station elevator comprises a machine frame, a double-station lift car, a lifting mechanism and a counterweight assembly, the machine frame is of a multi-layer structure, the lifting mechanism is fixedly arranged at the top of the machine frame, the double-station lift car is arranged in the machine frame in an up-down sliding mode, the lifting mechanism comprises a motor, a chain wheel and a transmission chain, one end of the transmission chain is connected with the double-station lift car, and the other end of the transmission chain is connected with the counterweight assembly. The motor drives the transmission chain through the chain wheel so that the double-station lift car can be driven to do lifting motion in the machine frame, and two roller way machines are arranged in the double-station lift car. The double-station elevator is compact in structure and high in space utilization rate, the input end and the output end of the double-station elevator can be in butt joint with a conveyor at the same time, one end lifts empty trays on the bottom layer to the input end, the other end transfers full trays on the high layer to the output end, the double-station elevator is adopted to complete the system connection task, the cost can be reduced, and the work efficiency is improved. The equipment efficiency of the system is improved, and the overall running time progress is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of elevators, and in particular relates to a double-station elevator. Background Art

[0002] In the dense storage warehousing system, the elevator is an important connecting equipment between the shuttle car and the in-and-out warehouse conveyor line. When there is an in-and-out task, the shuttle car runs to the cargo position where the outbound unit is located to pick up the goods and transport them to one end of the elevator, unloads the goods at the elevator and turns empty, and then the elevator carries the goods to the in-and-out warehouse port to complete an operation. Therefore, there will be problems such as elevator saturation and shuttle car idleness. Therefore, it is necessary to improve the existing elevator. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a double-station hoist to address the deficiencies in the prior art. The use of a double-station hoist to complete the system docking task can reduce costs, improve the efficiency of each system equipment, and improve the overall operating time schedule.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A double-station hoist comprises a frame, a double-station car, a lifting mechanism and a counterweight assembly. The frame is a multi-layer structure. The lifting mechanism is fixedly arranged on the top of the frame. The double-station car is slidable up and down in the frame. The lifting mechanism comprises a motor, a sprocket and a transmission chain. One end of the transmission chain is connected to the double-station car, and the other end is connected to the counterweight assembly. The motor drives the transmission chain through the sprocket to drive the double-station car to perform lifting and lowering movements in the frame. Two roller machines are arranged in the double-station car.

[0006] In order to better realize the present invention, further optimization is made in the above structure. The double-station elevator includes a mounting bottom frame, a connecting top frame and supporting vertical rods. The mounting bottom frame and the connecting top frame are connected by supporting vertical rods.

[0007] In order to better realize the present invention, further optimization is made in the above structure. Guide rails are arranged on both sides of the frame, guide shoes are arranged on both sides of the double-station car, and the double-station car is connected to the guide rails by sliding up and down through the guide shoes.

[0008] In order to better realize the present invention, further optimization is made in the above structure, and a plurality of width-limiting detection switches are arranged on the double-station elevator car.

[0009] In order to better realize the present invention, further optimization is made in the above structure, and an anti-falling mechanism is provided on the double-station elevator car.

[0010] In order to better realize the present invention, further optimization is made in the above structure, and an anti-collision device is also included. The anti-collision device is arranged on the top and bottom of the frame.

[0011] In order to better realize the present invention, further optimization is made in the above structure. The anti-collision device includes an electrical anti-collision mechanism and a mechanical anti-collision mechanism. The electrical anti-collision mechanism is an infrared light ranging anti-collision device, and the mechanical anti-collision mechanism is a polyurethane buffer.

[0012] In order to better realize the present invention, further optimization is made in the above structure, and the roller conveyor adopts variable frequency drive.

[0013] In order to better implement the present invention, further optimization is made in the above structure, and the motor is controlled by a servo driver.

[0014] In order to better implement the present invention, further optimization is made in the above structure, and a protective net is arranged on the outside of the frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The double-station elevator provided by the present invention has a compact structure and high space utilization. The input and output ends of the double-station elevator can be connected to the conveyor at the same time. One end is to lift the empty pallets on the bottom layer to the input end, and the other end is to transfer the full pallets on the upper layer to the output end. The use of a double-station elevator to complete the system docking task can reduce costs, improve the efficiency of each equipment in the system, and improve the overall operating time progress.

[0017] 2. The double-station car in the present invention is connected to the guide rail on the frame by sliding up and down through the guide shoe. Compared with the roller guide, the guide shoe structure increases the friction under the condition of lower speed requirements, which can reduce the error problem caused by settlement. It is also equipped with an anti-fall mechanism and a double anti-collision device to ensure safety, and the system is more stable and reliable. The roller conveyor adopts a variable frequency drive to ensure that it reaches the appropriate position when receiving the pallet to avoid affecting the action of the hoist. The motor is controlled by a servo drive, and the switch used for the lifting direction mainly includes upper and lower limit and other safety detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is one of the structural schematic diagrams of the double-station hoist of the present invention;

[0020] Figure 2 yes Figure 1 A is a schematic diagram of the partially enlarged structure of the middle part;

[0021] Figure 3 This is the second structural schematic diagram of the double-station hoist of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the double-station hoist of the present invention after removing the protective net;

[0023] Figure 5 yes Figure 4 A schematic diagram of the partially enlarged structure of B in the middle;

[0024] Figure 6 It is a structural schematic diagram of a double-station elevator car in the present invention;

[0025] Figure 7 It is a control method diagram of the double-station elevator of the present invention in logistics transportation.

[0026] In the figure:

[0027] 1-frame, 2-double-station car, 201-installation bottom frame, 202-link top frame, 203-support vertical rod, 3-lifting mechanism, 301-motor, 302-sprocket, 303-transmission chain, 4-counterweight assembly, 5-roller machine, 6-guide rail, 7-guide shoe, 8-width limit detection switch, 9-anti-fall mechanism, 10-infrared light ranging anti-collision device, 11-polyurethane buffer, 12-protective net. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the dense storage warehousing system, the elevator serves as an important connecting equipment between the shuttle car and the in-and-out warehouse conveyor line. When an in-and-out warehouse task is issued, the shuttle car runs to the cargo position where the outbound unit is located to pick up the goods and transport them to one end of the elevator, unloads the goods from the elevator and becomes empty, and then the elevator carries the goods to the in-and-out warehouse port to complete an operation.

[0032] In order to solve the problems of saturated workload of elevators and idle shuttles in existing dense storage warehouses, the two-way shuttle system takes the lane as the research unit. The shuttle makes horizontal reciprocating motion, and its motion direction is parallel to the lane. The in-and-out tasks of the shuttles on each floor in the lane are related to the in-and-out operations, and the elevators with vertical operation direction are connected. There are elevators at both ends of each lane to connect the shuttles and the in-and-out conveyor lines for in-and-out operations. Each lane has two elevators to provide in-and-out services for the shuttles in the lane. The total carrying capacity of the elevators is improved, the waiting time of the shuttles is shortened, and the efficiency of each device in the system is balanced.

[0033] like Figure 1-Figure 6 As shown, the structure diagram of the double-station elevator provided by the present invention includes a frame 1, a double-station car 2, a lifting mechanism 3 and a counterweight assembly 4. The frame 1 is a multi-layer structure, and each layer can be used for loading and unloading goods. The lifting mechanism 3 is fixedly arranged on the top of the frame 1, and the double-station car 2 is slidably arranged in the frame 1 up and down. Figure 4 and Figure 5 As shown, guide rails 6 are arranged on both sides of the frame 1, guide shoes 7 are arranged on both sides of the double-station car 2, and the double-station car 2 is connected to the guide rails 6 by means of the guide shoes 7 for up and down sliding. Compared with the roller guide, when the speed requirement is lower, the guide shoe 7 structure increases the friction force and can reduce the error problem caused by settlement.

[0034] The lifting mechanism 3 includes a motor 301, a sprocket 302 and a transmission chain 303. One end of the transmission chain 303 is connected to the duplex car 2, and the other end is connected to the counterweight assembly 4. The motor 301 drives the transmission chain 303 through the sprocket 302 to drive the duplex car 2 to do lifting and lowering movements in the frame 1. Two roller tables 5 are arranged in the duplex car 2, and the number of rollers on the two roller tables 5 is the same. The duplex elevator has a compact structure and high space utilization. The input and output ends of the duplex elevator can be connected to the conveyor at the same time. One end is to lift the empty pallet on the bottom layer to the input end, and the other end is to transfer the full pallet on the upper layer to the output end. The use of a duplex elevator to complete the system docking task can reduce costs, improve the efficiency of each system equipment, and improve the overall operation time schedule.

[0035] like Figure 6 As shown, the duplex car 2 includes a mounting bottom frame 201, a connecting top frame 202 and a supporting vertical rod 203. The mounting bottom frame 201 and the connecting top frame 202 are connected by the supporting vertical rod 203. The duplex car 2 has a firm structure and a strong carrying capacity. A plurality of width limit detection switches 8 are provided on the duplex car 2 to prevent the size of the cargo from exceeding the limit of the car, thereby avoiding collision and interference during transportation.

[0036] The double-station car 2 is provided with an anti-falling mechanism 9, which includes a mounting frame, an anti-settling clamping plate, a plug rod and an anti-settling base. The anti-falling mechanism 9 passes through a guide rod arranged on the frame 1 to perform lifting and lowering movements, thereby playing a role in safety and anti-falling.

[0037] It also includes an anti-collision device, which is arranged at the top and bottom of the frame 1. The anti-collision device includes an electrical anti-collision mechanism and a mechanical anti-collision mechanism. The electrical anti-collision mechanism is an infrared light ranging anti-collision device 10, and the mechanical anti-collision mechanism is a polyurethane buffer 11. By adopting a double-layer anti-collision design, the stability and safety of the elevator during operation are improved.

[0038] Roller conveyor 5 adopts variable frequency drive. Motor 301 is controlled by servo drive. The double-station hoist requires two sets of variable frequency drive systems and one set of servo drive system. The variable frequency drive is used for the operation of roller conveyor 5. The operation direction of roller conveyor 5 includes four photoelectric potentials, occupied position, full position, front limit and rear limit. Occupied position and full position ensure that the pallet reaches the appropriate position when receiving the pallet. The front and rear limits ensure that the pallet does not exceed roller conveyor 5 to avoid affecting the movement of the hoist. The servo drive system is a control system for the lifting direction. The lifting direction locates the height of each platform through a laser rangefinder and is connected to the servo drive to achieve speed regulation. The switches used for the lifting direction mainly include upper and lower limits and other safety detection aspects, including overspeed detection, chain break detection or loose rope detection.

[0039] like Figure 1 and Figure 3As shown, a protective net 12 is arranged outside the frame 1 to play a safety protection role.

[0040] The double-station hoist adopts a PLC control system in the electric control system. The PLC control system mainly includes the design of electrical safety circuits, I / O interface allocation settings, electrical interlocking design, and network communication between conveyors and shuttles. The double-station hoist adopts a variable frequency servo system drive device in the vertical direction, and is positioned based on laser ranging to enable high-speed operation and accurate positioning. In the double-end in-and-out operation mode, each in-and-out port requires cargo transportation between the hoist and the shuttle connecting each layer and the in-and-out port. Therefore, it is necessary to consider the command distribution between the two roller conveyors 5 in the operation sequence model, as well as the operation time and waiting time between each device in this case. When designing the safety circuit, the safety circuit design is performed for the PLC software program of the electric control system and the hardware equipment composed of the relay switch device.

[0041] In the logistics transportation system, the double-station elevator's double-station car 2 can move synchronously. When the outbound instruction is issued, the shuttle runs to the designated cargo compartment to take out the corresponding goods, and then intelligently allocates to the fastest available elevator according to the queue length and expected waiting time of the elevators on both sides. When the task is issued, the shuttle will run to the cargo position where the outbound unit is located, pick up the goods and transport them to the left car, hand over and unload with the left car, and be released. At the same time, it can receive the goods or pallets that need to be transported into the warehouse from the right car. Or it can receive an outbound cargo and transport it to the exit at the same time. The car carries the goods to the outbound port, and the elevator runs from the floor where the shuttle car that has completed the handover is located to the inbound and outbound port and unloads the goods, and releases the elevator resources after completion.

[0042] The system communication system of the double-station hoist is composed of Siemens S7-1500 PLC master and slave control cabinets. The master control cabinet PLC module can be subdivided into CPU module, power module, DI / D0 module, AI / A0 module. The master control cabinet PLC and the hoist operating console PLC will communicate data via the profinet network.

[0043] The principle of its control circuit is: the elevator is composed of a lifting mechanism and a roller conveyor mechanism. The lifting mechanism has parallel longitudinal and rearward movement, and has a horizontal roller conveyor for pallets and other materials. System communication mode control system function: 1. The warehouse management computer and the warehouse area control industrial computer are network communications; 2. Internal communication of the dense warehouse, that is, the control cabinet and the equipment are Profinet communications. 3. The communication between the dense warehouse control industrial computer and the equipment system, and the communication with fixed equipment are wired communications using network cables or 485; 4. The intelligent dense three-dimensional warehouse realizes motor control through the control signal line, and reads the opening status, infrared anti-collision and other information by obtaining the signal line status.

[0044] Double-station elevator in logistics conveying system:

[0045] like Figure 7 As shown, in the logistics transportation system, the double-station elevator can move synchronously with the elevator cars at both ends. When the outbound order is issued, the shuttle runs to the designated cargo compartment to take out the corresponding goods. Then, according to the queue length and expected waiting time of the elevators on both sides, when the task is issued, the shuttle will run to the cargo position where the outbound unit is located, pick up the goods and transport them to car 1, hand over and unload with car 1, and be released. Car 2 carries the goods to the inbound and outbound port, and the elevator runs from the floor where the shuttle car that has completed the handover is located to the inbound and outbound port and unloads the goods. After completion, the elevator resources are released.

[0046] In the above-mentioned dual-station elevator picking up, under the dispatch of the control system, the shuttle car goes to the dense storage unit as required, and the elevator car 1 moves vertically as required to align with the conveying plane where the shuttle car is located. Then the shuttle car transports the dense storage unit to the roller conveyor, and the elevator car rollers and the roller conveyor rotate at the same time, and the elevator picking operation is realized through transportation.

[0047] With regard to the above-mentioned elevator inventory: under the dispatch of the control device, the elevator car 2 is at the entry and exit end of the dense storage, the electric roller conveyor's exit end is aligned with the conveying plane of the platform, the entry platform and the electric rollers of the elevator rotate at the same time to transport the goods to the corresponding units, and at the same time, under the action of the control system, the shuttle car transports the goods to the required storage location, thereby realizing inventory and completing the entire inventory process.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-station hoist, characterized in that: The invention comprises a frame (1), a double-station car (2), a lifting mechanism (3) and a counterweight assembly (4); the frame (1) is a multi-layer structure; the lifting mechanism (3) is fixedly arranged on the top of the frame (1); the double-station car (2) is slidably arranged in the frame (1); the lifting mechanism (3) comprises a motor (301), a sprocket (302) and a transmission chain (303); one end of the transmission chain (303) is connected to the double-station car (2) and the other end is connected to the counterweight assembly (4); the motor (301) drives the transmission chain (303) through the sprocket (302) to drive the double-station car (2) to move up and down in the frame (1); and two roller conveyors (5) are arranged in the double-station car (2).

2. A double-station hoist according to claim 1, characterized in that: The double-station elevator car (2) comprises a mounting bottom frame (201), a connecting top frame (202) and a supporting vertical rod (203); the mounting bottom frame (201) and the connecting top frame (202) are connected via the supporting vertical rod (203).

3. A double-station hoist according to claim 2, characterized in that: Guide rails (6) are arranged on both sides of the frame (1), guide shoes (7) are arranged on both sides of the double-station car (2), and the double-station car (2) is connected to the guide rails (6) by sliding up and down via the guide shoes (7).

4. A double-station hoist according to claim 3, characterized in that: The double-station elevator car (2) is provided with a plurality of width-limiting detection switches (8).

5. A double-station hoist according to claim 4, characterized in that: The double-station elevator car (2) is provided with an anti-falling mechanism (9).

6. A double-station hoist according to any one of claims 1-5, characterized in that: It also comprises an anti-collision device, which is arranged on the top and bottom of the frame (1).

7. A double-station hoist according to claim 6, characterized in that: The anti-collision device comprises an electrical anti-collision mechanism and a mechanical anti-collision mechanism, the electrical anti-collision mechanism is an infrared light ranging anti-collision device (10), and the mechanical anti-collision mechanism is a polyurethane buffer (11).

8. A double-station hoist according to claim 6, characterized in that: The roller conveyor (5) is driven by variable frequency.

9. A double-station hoist according to claim 6, characterized in that: The motor (301) is controlled by a servo drive.

10. A double-station hoist according to claim 6, characterized in that: A protective net (12) is arranged on the outside of the frame (1).

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