Continuous elevator

Abstract

The continuous elevator comprises a frequency converter, a vertical lifting motor and a brake, one side of the frequency converter is connected with a three-phase power supply, and the other side of the frequency converter is connected with the vertical lifting motor; an elevator tray which is driven by a vertical lifting motor to reciprocate up and down is arranged in a main body frame of the continuous elevator, and elevator tray detection sensors are arranged at the positions, close to the top and the bottom, of the main body frame respectively. A contactor is arranged between the three-phase power supply and the brake, the signal input end of the contactor is connected with the elevator tray detection sensor, and the contactor is in signal connection with the frequency converter and receives and feeds back synchronous control signals. Compared with the prior art, the brake timing of the elevator can be effectively controlled, it is guaranteed that the elevator acts smoothly, and the phenomenon that goods fall off from the elevator is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of logistics, and in particular to a continuous elevator. Background Art

[0002] A hoist is a mechanical device for transporting objects vertically. In industrial production, it involves the turnover of goods in factory workshops, and it is necessary to lift heavier goods to a certain height.

[0003] As disclosed in Chinese patent application CN202411321177.1, the current continuous elevators are generally chain-driven, with the motor driving the chain and the pallet to achieve continuous up and down conveyance of items. However, the existing continuous elevators lack effective monitoring of the pallet lifting process. The rapid acceleration and deceleration of the elevator will impact the motor and the frame, and if the elevator brakes in time, the pallet will hit the frame, causing the goods transported in the pallet to fall. Summary of the invention

[0004] The purpose of the present invention is to provide a continuous elevator to overcome the problem of the above-mentioned prior art that the transported goods are prone to falling.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A continuous hoist comprises a frequency converter, a vertical lifting motor and a brake, wherein one side of the frequency converter is connected to a three-phase power supply, and the other side is connected to the vertical lifting motor; a hoist tray driven by the vertical lifting motor to perform up and down reciprocating motion is arranged in the main frame of the continuous hoist, and hoist tray detection sensors are respectively arranged near the top and the bottom of the main frame; a contactor is arranged between the three-phase power supply and the brake, the signal input end of the contactor is connected to the hoist tray detection sensor, and the contactor is connected to the frequency converter signal to receive and feed back a synchronous control signal.

[0007] As a preferred technical solution, the frequency converter is connected to a high-frequency braking resistor, and a rectifier is arranged between the contactor and the brake.

[0008] As a preferred technical solution, an item detection photoelectric device is provided in the elevator tray.

[0009] As a preferred technical solution, the object detection photoelectric device is provided with two groups, and the two groups of the object detection photoelectric devices are arranged in parallel.

[0010] As a preferred technical solution, an unloading start switch and an unloading stop switch are provided on the top of the main frame, and a loading start switch and a loading stop switch are provided on the bottom of the main frame. The switches are respectively connected to the control of the upstream and downstream conveying devices for linkage control of the loading and unloading processes of the elevator.

[0011] As a preferred technical solution, an interference detection sensor is provided at the bottom of the main frame, above the lowest position of the elevator tray.

[0012] As a preferred technical solution, the interference detection sensor is a proximity switch.

[0013] As a preferred technical solution, a photoelectric device for detecting falling objects is provided at the bottom of the main frame below the lowest position of the elevator tray.

[0014] As a preferred technical solution, the photoelectric devices for detecting object falling are provided in two groups, and the two groups of photoelectric devices for detecting object falling are provided in parallel.

[0015] As an optimal technical solution, the signal receiving interface of the frequency converter includes: an input interface for motor forward, reverse, high-speed and low-speed operation signals; the signal output interface of the frequency converter includes: an output interface for the start and stop signals of the hoist.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The continuous elevator proposed in the present invention uses a contact switch and a contactor to control the brake timing of the elevator, ensuring that the elevator moves smoothly and avoids the phenomenon of goods falling from the elevator. In addition, it is also equipped with a photoelectric sensor for detecting falling objects and an interference detection sensor to detect abnormalities in the work process of the elevator and to remind the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the continuous elevator of the present invention;

[0019] Figure 2 It is a circuit diagram of the continuous hoist of the present invention;

[0020] The numbers in the figure are as follows: 1. Main frame, 2. Hoist tray, 3. Item detection photoelectric, 4. Unloading start switch, 5. Unloading stop switch, 6. Loading start switch, 7. Loading stop switch, 8. Interference detection photoelectric, 9. Hoist tray detection photoelectric, 10. Item drop detection photoelectric. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0022] Example 1

[0023] like Figure 1 As shown, the main frame 1 of the continuous elevator proposed by the present invention is provided with an elevator tray 2 driven by a motor to reciprocate up and down, and the elevator tray 2 lifts the goods below and transports them to the top of the elevator. Two sets of object detection photoelectric sensors 3 are provided in the elevator tray 2, and the two sets of object detection photoelectric sensors 3 are arranged in parallel to detect whether the cargo area in the elevator tray 2 is loaded.

[0024] The top of the main frame 1 is provided with an unloading start switch 4 and an unloading stop switch 5, and the bottom of the main frame 1 is provided with a loading start switch 6 and a loading stop switch 7. These switches are respectively connected to the upstream and downstream conveying device control to perform linkage control on the loading and unloading process of the elevator.

[0025] At the bottom of the main frame 1, an interference detection sensor 8 is arranged above the lowest position of the elevator tray 2. Specifically, the interference detection sensor 8 adopts a proximity switch. If an object is detected approaching when the elevator tray 2 is loading at the bottom of the elevator, a stop command is issued to avoid collision.

[0026] The main frame 1 is provided with a hoist tray detection sensor 9 near the top and the bottom. The hoist tray detection sensor 9 adopts a proximity switch to detect the position of the lowering tray and then control the braking timing through a contactor.

[0027] At the bottom of the main frame 1, below the lowest position of the elevator tray 2, two sets of item drop detection photoelectric sensors 10 are arranged. The two sets of item drop detection photoelectric sensors are arranged parallel to the width direction of the main frame 10; when the goods loaded on the elevator tray 2 fall from above, the item drop detection photoelectric sensors will be triggered and the staff will be reminded and alarmed.

[0028] like Figure 2As shown, the main components of the circuit part of the continuous hoist of the present invention include: a frequency converter, a contactor, a vertical lifting motor and a brake. The 250V three-phase electricity from the three-phase power supply output is used to power the vertical lifting motor after passing through the frequency converter. A contactor is provided between the three-phase power supply and the brake, and is powered after passing through a rectifier. The signal input end of the contactor is connected to the hoist tray detection sensor 9; the frequency converter is connected to a high-frequency braking resistor contactor, the contactor is connected to the frequency converter signal, receives and feeds back the output synchronization control signal. The timing of the brake is controlled through the contactor by using the proximity switch that detects the position of the elevator tray to prevent the hoist from slipping.

[0029] The signal receiving interface of the frequency converter includes: the input interface of the motor forward rotation, reverse rotation, high speed operation and low speed operation signal; the signal output interface of the frequency converter includes: the output interface of the start and stop signal of the hoist. The frequency converter model used in this embodiment is FR-E840-0040-4-60, 1.51KW / 4.0A; the model of the brake resistor is FR-ABR-H1.5K; the model of the contactor is LP1K0610BD.

[0030] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A continuous hoist, comprising a frequency converter, a vertical lifting motor and a brake, wherein one side of the frequency converter is connected to a three-phase power supply and the other side is connected to the vertical lifting motor; a hoist tray (2) driven by the vertical lifting motor to reciprocate up and down is arranged in the main frame (1) of the continuous hoist, characterized in that: The main frame (1) is provided with a hoist pallet detection sensor (9) at positions near the top and the bottom respectively; a contactor is provided between the three-phase power supply and the brake, the signal input end of the contactor is connected to the hoist pallet detection sensor (9), and the contactor is connected to the frequency converter signal to receive and feed back the synchronous control signal.

2. A continuous elevator according to claim 1, characterized in that: The frequency converter is connected with a high-frequency braking resistor, and a rectifier is arranged between the contactor and the braking brake.

3. A continuous elevator according to claim 1, characterized in that: An article detection photoelectric device (3) is arranged inside the elevator tray (2).

4. A continuous elevator according to claim 3, characterized in that: The object detection photoelectric devices (3) are provided in two groups, and the two groups of object detection photoelectric devices (3) are provided in parallel.

5. A continuous elevator according to claim 1, characterized in that: The top of the main frame (1) is provided with an unloading start switch (4) and an unloading stop switch (5), and the bottom of the main frame (1) is provided with a loading start switch (6) and a loading stop switch (7), and the switches are respectively connected to the control of the upstream and downstream conveying devices, and are used to control the loading and unloading processes of the elevator in a linked manner.

6. A continuous elevator according to claim 1, characterized in that: An interference detection sensor (8) is provided at the bottom of the main frame (1), located above the lowest position of the elevator tray (2).

7. A continuous elevator according to claim 6, characterized in that: The interference detection sensor (8) is a proximity switch.

8. A continuous elevator according to claim 1, characterized in that: An article falling detection photoelectric device (10) is arranged at the bottom of the main frame (1) below the lowest position of the elevator tray (2).

9. A continuous elevator according to claim 8, characterized in that: The object falling detection photoelectric devices (10) are provided with two groups, and the two groups of object falling detection photoelectric devices (10) are arranged in parallel.

10. A continuous elevator according to claim 1, characterized in that: The signal receiving interface of the frequency converter includes: an input interface for motor forward rotation, reverse rotation, high-speed operation and low-speed operation signals; the signal output interface of the frequency converter includes: an output interface for hoist start and stop signals.

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