Container unlocking device

Abstract

The utility model relates to a container unlocking device, which belongs to the technical field of vehicles, and comprises rotating pin lock heads arranged at four corners of a trailer flat plate, a worm and gear mechanism is additionally arranged below the rotating pin lock heads, the worm and gear mechanism comprises a worm gear and a worm which are meshed with each other, and a driving motor is arranged on the worm. The worm gear is matched with the rotating pin lock through matching of a hole and a shaft key, limiting switches are arranged at the 0-degree corner position and the 90-degree corner position of the rotating pin lock respectively and connected with a cab operation switch platform arranged in a trailer cab through a control circuit, and a lock opening and closing operation switch is arranged on the cab operation switch platform. The cab operation switch platform is further provided with an indicating lamp. The problem that a driver needs to get off the vehicle to open and close the lock can be well solved, the transportation efficiency is greatly improved, meanwhile, the labor intensity of the driver is reduced, potential safety hazards are completely eradicated, and safe and smooth production is guaranteed.

Description

Technical Field

[0001] The utility model relates to a container unlocking device, belonging to the technical field of vehicles. Background Art

[0002] The transportation of containerized goods is a modern transportation mode, which has many advantages such as convenient and fast loading and unloading, improved loading and unloading efficiency, ensuring the safety of goods, and saving packaging costs. It is applicable to marine transportation, railway transportation, and international multimodal transportation, etc. The flatbed trailer for container transportation is an important carrier for transporting containers and plays a crucial role. When using a flatbed trailer to transport a container, in order to ensure safety during transportation, usually, the container is firmly locked with the rotary pin locks at the four corners of the flatbed to prevent it from tipping over or being thrown off during transportation.

[0003] In the teaching of crane loading and unloading container safety accidents, it is found that sometimes when a crane loads and unloads a container, it will lift the trailer together. This is because the trailer driver fails to open the rotary pin locks at the four corners of the trailer in time. Usually, after the container is loaded, the trailer driver will get out of the vehicle and walk around the vehicle to tighten the rotary pin locks. When the flatbed trailer transports the container to the station or terminal yard and the container is unloaded from the flatbed trailer by a container crane for stacking, sometimes because the driver forgets to open the locks, when the container crane lifts the container with the spreader, due to the large lifting load of the container crane, it will lift the truck together, resulting in extremely serious production safety accidents and sometimes even causing casualties. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem of large potential safety hazards existing in the prior art and provide a container unlocking device.

[0005] The utility model is realized by the following technical solutions:

[0006] That is, a container unlocking device includes rotary pin locks installed at the four corners of the trailer flatbed. A worm and worm gear mechanism is additionally installed below the rotary pin locks. The worm and worm gear mechanism includes a mutually meshing worm and worm gear. A driving motor is installed on the worm. The worm gear is in fit with the rotary pin lock through a hole and a shaft key.

[0007] At the 0° corner position of the rotary pin lock head, there are normally closed 0-degree opening limit switches, laser proximity switches, and 0-degree normally open induction switches. At the 90° corner position of the rotary pin lock head, there are normally closed 90-degree closing limit switches and 90-degree normally open induction switches. The 0-degree opening limit switch and the 90-degree closing limit switch are both connected to the cab operation switch platform arranged in the trailer cab through control lines. A diode is respectively connected in parallel to the 0-degree opening limit switch and the 90-degree closing limit switch. On the cab operation switch platform, there is a lock head opening and closing operation switch. On the cab operation switch platform, there are also a green indicator light and a red indicator light for displaying the switch state of the rotary pin lock head. The green indicator light and the red indicator light are respectively conducted with the circuit loop of the trailer power supply. The green indicator light is connected in series with the 0-degree normally open induction switch, and the red indicator light is connected in series with the 90-degree normally open induction switch.

[0008] The utility model can well solve the problem that the driver needs to get off the vehicle to operate the lock head, greatly improve the transportation efficiency, and at the same time reduce the labor intensity of the driver and the potential safety hazards caused by poor weather or poor night lighting conditions. The most important thing is to prevent the accident that the lock head is forgotten to be opened due to the driver's negligence and the whole trailer is lifted when the crane unloads the vehicle, improve the safety production efficiency, and ensure the smooth progress of production safety.

[0009] Further preferably, a positioning sleeve and a fastening nut are sleeved on the lower part of the rotary pin lock head.

[0010] Further preferably, the positioning sleeve is located between the rotary pin lock head and the trailer, and the upper end of the fastening nut abuts against the lower end of the trailer, playing a good role in fixing and limiting the rotary pin lock head.

[0011] Further preferably, a parking brake limit switch and an infrared photoelectric induction sensor diffuse reflection proximity switch are also arranged on the control line. The parking brake limit switch and the infrared photoelectric induction sensor diffuse reflection proximity switch are connected in series with the drive motor and the laser proximity switch. The infrared photoelectric induction sensor diffuse reflection proximity switch and the parking brake limit switch are connected in series with the 0-degree opening limit switch and the 90-degree closing limit switch in a circuit and connected to the drive motor to form a complete independent circuit. When the container handling spreader descends to grab the container, during the descent of the spreader, the infrared photoelectric induction sensor diffuse reflection proximity switch will be triggered to open. At this time, the trailer is in a parked state, and the parking brake limit switch is also in a conducting state. If the rotary pin lock head is in a closed state at this time, the rotary pin lock head will immediately open to ensure the smooth lifting of the container, avoid lifting the whole trailer, and eliminate the occurrence of safety accidents.

[0012] Further preferably, the infrared photoelectric induction sensor diffuse reflection proximity switch is normally closed and is arranged above the trailer cab.

[0013] Further preferably, a double-edge switch for controlling the forward and reverse rotation of the drive motor is provided on the line connecting the drive motor to the power supply.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The present utility model can well solve the problem that the driver needs to get out of the vehicle to operate the switch lock, greatly improving the transportation efficiency, reducing the labor intensity of the driver, and eliminating the potential safety hazards caused by poor weather or poor night lighting conditions. Most importantly, it prevents the accident of forgetting to open the lock due to the driver's negligence, resulting in the entire trailer being lifted when the crane unloads the vehicle, improving the safety production efficiency and ensuring the smooth progress of production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the specific embodiment of the present utility model.

[0018] Figure 2 It is a schematic bottom view structural diagram of the lock in the specific embodiment of the present utility model.

[0019] Figure 3 It is a schematic electrical principle structural diagram of the specific embodiment of the present utility model.

[0020] Figure 4 It is a schematic circuit structural diagram of the indicator light in the specific embodiment of the present utility model.

[0021] Figure 5 It is a schematic structural diagram of the spreader lifting the container in the specific embodiment of the present utility model.

[0022] In the figure: 1, rotary pin lock head; 2, trailer; 3, worm gear; 4, positioning sleeve; 5, fastening nut; 6, worm; 7, 0-degree opening limit switch; 8, 90-degree closing limit switch; 9, drive motor; 10, parking brake limit switch; 11, control circuit; 12, infrared photoelectric induction sensor diffuse reflection proximity switch; 13, cab operation switch platform; 14, green indicator light; 15, lock head opening and closing operation switch; 16, red indicator light; 17, container; 18, container loading and unloading spreader; 19, laser proximity switch; 20, 0-degree normally open induction switch; 21, 90-degree normally open induction switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0024] As Figures 1 to 5 shown, a container unlocking device includes a pivot lock head 1 installed at the four corners of the flatbed of a trailer 2. A worm and worm gear mechanism is additionally installed below the pivot lock head 1. The worm and worm gear mechanism includes a mutually meshing worm wheel 3 and a worm 6. A driving motor 9 is installed on the worm 6. The worm wheel 3 is in cooperation with the pivot lock head 1 through hole, shaft key fit.

[0025] At the 0° rotation angle position of the pivot lock head 1, a normally closed 0-degree opening limit switch 7, a laser proximity switch 19, and a 0-degree normally open induction switch 20 are provided. At the 90° rotation angle position of the pivot lock head 1, a normally closed 90-degree closing limit switch 8 and a 90-degree normally open induction switch 21 are provided. The 0-degree opening limit switch 7 and the 90-degree closing limit switch 8 are both connected to a cab operation switch platform 13 arranged in the cab of the trailer 2 through a control line 11. A diode is respectively connected in parallel to the 0-degree opening limit switch 7 and the 90-degree closing limit switch 8. A lock head opening and closing operation switch 15 is provided on the cab operation switch platform 13. A green indicator light 14 and a red indicator light 16 for displaying the switch state of the pivot lock head 1 are also provided on the cab operation switch platform 13. The green indicator light 14 and the red indicator light 16 are respectively electrically connected to the circuit loop of the power supply of the trailer 2. The green indicator light 14 is connected in series with the 0-degree normally open induction switch 20, and the red indicator light 16 is connected in series with the 90-degree normally open induction switch 21.

[0026] The present utility model can well solve the problem that the driver needs to get out of the vehicle to operate the lock head, greatly improves the transportation efficiency, and at the same time reduces the labor intensity of the driver and the potential safety hazards caused by poor weather or poor night lighting conditions. The most important thing is to prevent the accident that the entire trailer 2 is lifted by the crane during unloading due to the driver's negligence in forgetting to open the lock head, improves the safety production efficiency, and ensures the smooth progress of production safety.

[0027] Among them, a positioning sleeve 4 and a fastening nut 5 are sleeved on the lower part of the pivot lock head 1. The positioning sleeve 4 is located between the pivot lock head 1 and the trailer 2, and the upper end of the fastening nut 5 abuts against the lower end of the trailer 2, playing a good role in fixing and limiting the pivot lock head 1.

[0028] Among them, a parking brake limit switch 10 and an infrared photoelectric induction sensor diffuse reflection proximity switch 12 are also provided on the control circuit 11. The parking brake limit switch 10, the infrared photoelectric induction sensor diffuse reflection proximity switch 12 are connected in series with the drive motor 9 and the laser proximity switch 19. The infrared photoelectric induction sensor diffuse reflection proximity switch 12 is normally closed and is arranged above the cab of the trailer 2. The infrared photoelectric induction sensor diffuse reflection proximity switch 12, the parking brake limit switch 10, the 0-degree opening limit switch 7 and the 90-degree closing limit switch 8 are connected in series into a circuit and connected to the drive motor 9 to form a complete independent circuit. When the container handling spreader 18 descends to grab the container 17, the infrared photoelectric induction sensor diffuse reflection proximity switch 12 will be triggered to open during the descent of the spreader. At this time, the trailer 2 is in a parked state, and the parking brake limit switch 10 is also in a conducting state. If the pin lock 1 is in the closed state at this time, the pin lock 1 will immediately open, ensuring the smooth lifting of the container 17, preventing the entire trailer from being lifted, and eliminating the occurrence of safety accidents.

[0029] Among them, on the line where the drive motor 9 is connected to the power supply, there is a motor forward and reverse double-edge switch for controlling the forward and reverse rotation of the drive motor 9.

[0030] Working principle:

[0031] Connect the power supply, limit switch, drive motor 9, and cab lock opening and closing switch 15 through lines, and connect them in two paths. Connect the lock switch open state and the power supply limit switch with wires. When the driver presses the open switch in the cab, if the lock is in the 0-degree open state, the 0-degree opening limit switch 7 is triggered to disconnect, and the motor cannot be powered on and run. If the lock is in the 90-degree closed state, the 90-degree closing limit switch 8 is triggered to disconnect, and the motor is powered on and runs to drive the lock to rotate to the 0-degree open state. Similarly, after the closing circuit is connected, press the close switch to close the lock.

[0032] The switch green, red indicator lights and the indicator light normally closed induction switch are connected in two paths. The two normally closed induction switches are respectively installed at the positions where the lock is fully open and fully closed. The open state is indicated by a green light, and the closed state is indicated by a red light. When the lock is fully open, the 0-degree normally open induction switch 20 conducts, and the current flows from the power supply to the green light, and then the green light lights up, playing a prompting role. On the contrary, when the lock is fully closed, the 90-degree normally open induction switch 21 conducts, and the red light will light up, playing a prompting role.

[0033] The infrared photoelectric induction sensor diffuse reflection proximity switch 12, the parking brake limit switch 10, the 0-degree opening limit switch 7 and the 90-degree closing limit switch 8 are connected in series into a circuit and connected to the drive motor 9 to form a complete independent circuit.

[0034] When the container handling spreader 18 descends to grasp the container 17, the infrared photoelectric induction sensor diffuse reflection proximity switch 12 will be triggered to open during the descent of the spreader. At this time, the trailer 2 is in a parked state, and the parking brake limit switch 10 is also in a conducting state. If the pin lock head 1 is in a closed state at this time, the pin lock head 1 will immediately open to ensure the smooth lifting of the container 17, avoid lifting the entire trailer, and eliminate the occurrence of safety accidents.

[0035] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0036] The terms "upper", "lower", "outer side", "inner side", etc. in the specification, claims and above-mentioned drawings of the present utility model, if any, are used to distinguish the relative relationship in position and do not need to be qualitatively defined. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A container unlocking device, characterized in that: It comprises a rotating pin lock (1) installed at four corners of a flatbed of a trailer (2), a worm gear mechanism is installed below the rotating pin lock (1), the worm gear mechanism comprises a worm wheel (3) and a worm (6) meshing with each other, a driving motor (9) is installed on the worm (6), and the worm wheel (3) is matched with the rotating pin lock (1) through a hole and a shaft key; A normally closed 0-degree opening limit switch (7), a laser proximity switch (19) and a normally open 0-degree induction switch (20) are provided at the 0-degree rotation angle position of the rotating pin lock (1); a normally closed 90-degree closing limit switch (8) and a normally open 90-degree induction switch (21) are provided at the 90-degree rotation angle position of the rotating pin lock (1); the 0-degree opening limit switch (7) and the 90-degree closing limit switch (8) are both connected to a cab operating switch platform (13) provided in the cab of the trailer (2) through a control line (11); and the 0-degree opening limit switch (7) and the 90-degree closing limit switch (8) are both connected to a cab operating switch platform (13) provided in the cab of the trailer (2) through a control line (11). A diode is connected in parallel to each of the position switches (8), a lock opening and closing operation switch (15) is provided on the cab operation switch platform (13), and a green indicator light (14) and a red indicator light (16) for displaying the switch state of the turn pin lock (1) are also provided on the cab operation switch platform (13). The green indicator light (14) and the red indicator light (16) are respectively connected to the circuit loop of the power supply of the trailer (2), the green indicator light (14) is connected in series with the 0 degree normally open induction switch (20), and the red indicator light (16) is connected in series with the 90 degree normally open induction switch (21).

2. A container unlocking device according to claim 1, characterized in that: The lower part of the rotating pin lock (1) is provided with a positioning sleeve (4) and a fastening nut (5).

3. A container unlocking device according to claim 2, characterized in that: The positioning sleeve (4) is located between the turn pin lock (1) and the trailer (2), and the upper end of the fastening nut (5) is pressed against the lower end of the trailer (2).

4. A container unlocking device according to claim 1, characterized in that: A parking brake limit switch (10) and an infrared photoelectric sensor diffuse reflection proximity switch (12) are also provided on the control circuit (11); the parking brake limit switch (10), the infrared photoelectric sensor diffuse reflection proximity switch (12) are connected in series with the drive motor (9) and the laser proximity switch (19).

5. A container unlocking device according to claim 4, characterized in that: The infrared photoelectric induction sensor diffuse reflection proximity switch (12) is of a normally closed type and is arranged above the cab of the trailer (2).

6. A container unlocking device according to claim 1, characterized in that: A motor forward and reverse double-blade switch for controlling the forward and reverse rotation of the drive motor (9) is provided on a circuit connecting the drive motor (9) to a power source.

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