Mechanical interlocking safety door

Abstract

The utility model provides a mechanical interlocking safety door. Relates to the field of crane components, and aims to solve the problem that safety doors of a cab platform and a channel platform of an existing crane are poor in protection effect, a first door body is arranged on the cab platform and matched with a first guide rod and a second baffle, and a second door body is arranged on the channel platform and matched with a first guide rod and a second baffle. When the cab platform and the channel platform are aligned, a first collision rod on the cab platform triggers a second guide rod to enable a second baffle to relieve rotation blocking of a second door body, a second collision rod on the channel platform triggers a first guide rod to enable a first baffle to relieve rotation blocking of a first door body, mechanical interlocking and unlocking are achieved, and the protection performance is improved; and the safety is ensured.

Description

Technical Field

[0001] The utility model relates to the field of crane components, and particularly relates to a mechanical interlock safety door. Background Art

[0002] When the quay crane or ship-to-shore crane is working, the platform carried by the driver's cab runs together with the hoisting trolley. When the hoisting trolley reaches the parking position, the safety door of the platform carried by the driver's cab aligns with the safety door of the external passage leading to the driver's cab platform. The driver can reach the external passage from the platform carried by the driver's cab by opening the internal and external safety doors, and then reach the ground along the whole machine passage, or board the driver's cab and reach the driver's cab through the external platform. When the trolley does not reach the parking position, there will be a misalignment between the platform carried by the driver's cab and the external passage. If the driver prepares to get off the machine in this situation, there will be a serious safety accident such as stepping into the air and falling from a height due to negligence after opening the safety door.

[0003] At present, cranes only use control methods such as programs, trolley positioning, and electronic locks to ensure the accuracy of the trolley parking position, and at the same time prevent the situation where the driver can still open the safety door when the driver's cab platform is not aligned, so as to avoid the driver stepping into the air or falling from a height due to negligence. However, the electric control method has certain limitations. The program settings need to be maintained and malicious modification needs to be avoided, and electrical components such as limit switches and electronic locks are exposed to the outdoor environment for a long time, and there are risks of failure, damage, and induction failure. Chinese Patent (Publication No.: CN202731612U) discloses a safety door and construction machinery. The door body and the door frame are connected by a rotating shaft, and the rotating shaft is inclined relative to the direction of the rotating shaft, so that the door body can automatically close under the action of gravity after being opened. However, it still cannot confirm the relative position between the driver's cab platform and the external passage, and there is a situation where the door body can still be opened when the driver's cab platform is not aligned with the external passage, and the protection ability of the safety door is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mechanical interlock safety door aiming at the defects existing in the prior art. A first door body is arranged on the driver's cab platform, and the first door body is matched with a first guide rod and a second baffle. A second door body is arranged on the passage platform, and the second door body is matched with the first guide rod and the second baffle. When the driver's cab platform and the passage platform are aligned, the first striking rod on the driver's cab platform triggers the second guide rod, so that the second baffle releases the rotational block on the second door body, and the second striking rod on the passage platform triggers the first guide rod, so that the first baffle releases the rotational block on the first door body, realizing mechanical interlock and unlocking, improving the protection performance and ensuring safety.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] A mechanical interlock safety door, comprising:

[0007] The first door body is rotatably installed on the driver's cab platform;

[0008] The second door body is rotatably installed on the passage platform;

[0009] The first limiting component includes a connected first guide rod and a first baffle. The first guide rod is slidably installed on the driver's cab platform, and the first baffle faces the first door body. When the first guide rod is triggered by the bumper rod on the passage platform, the first guide rod drives the first baffle to move axially to release the limit on the first door body;

[0010] The second limiting component includes a connected second guide rod and a second baffle. The second guide rod is slidably installed on the passage platform, and the second baffle faces the second door body. When the second guide rod is triggered by the bumper rod on the driver's cab platform, the second guide rod drives the second baffle to move axially to release the limit on the second door body.

[0011] Further, a first limiting plate that rotates with the first door body is provided on the first door body. The first limiting plate and the first baffle are arranged oppositely, and the first baffle is used to abut against the first limiting plate to block the rotation of the first door body.

[0012] Further, a second limiting plate that rotates with the second door body is provided on the second door body. The second limiting plate and the second baffle are arranged oppositely, and the second baffle is used to abut against the first limiting plate to block the rotation of the second door body.

[0013] Further, a first guide frame is installed on the driver's cab platform. The first guide rod is slidably matched with the first guide frame, and the first guide rod slides vertically relative to the first guide frame under the action of gravity.

[0014] Further, a second guide frame is installed on the driver's cab platform. The second guide rod is slidably matched with the second guide frame, and the second guide rod slides vertically relative to the second guide frame under the action of gravity.

[0015] Further, rollers are respectively installed at the bottom ends of the first guide rod and the second guide rod. A first bumper rod is connected to the driver's cab platform, and the first bumper rod abuts against the roller to drive the second guide rod to rise. A second bumper rod is connected to the passage platform, and the second bumper rod abuts against the roller to drive the first guide rod to rise.

[0016] Further, both the first bumper rod and the second bumper rod are L-shaped and are arranged in a staggered manner.

[0017] Further, slopes with trapezoidal cross-sections are respectively provided at the positions where the first bumper rod and the second bumper rod abut against the rollers. When the driver's cab platform and the passage platform are aligned, the rollers are at the top ends of the slopes, so that both the first guide rod and the second guide rod are triggered.

[0018] Further, the first baffle is connected to the top end of the first guide rod. The first baffle extends radially along the first guide rod to the outside of the first guide rod, and one end of the first baffle located outside the first guide rod restricts the rotation of the first door body.

[0019] Further, the second baffle is connected to the top end of the second guide rod. The second baffle extends radially along the second guide rod to the outside of the second guide rod, and one end of the second baffle located outside the second guide rod restricts the rotation of the second door body.

[0020] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0021] (1) Aiming at the problem of poor protection effect of the safety doors on the driver's cab platform and passage platform of the current crane, a first door body is provided on the driver's cab platform. The first door body is equipped with a first guide rod and a second baffle. A second door body is provided on the passage platform. The second door body is equipped with a first guide rod and a second baffle. When the driver's cab platform and the passage platform are aligned, the first striker on the driver's cab platform triggers the second guide rod, so that the second baffle releases the rotational block of the second door body. The second striker on the passage platform triggers the first guide rod, so that the first baffle releases the rotational block of the first door body, realizing mechanical interlocking and unlocking, improving the protection performance and ensuring safety.

[0022] (2) A corresponding guide frame is configured for the guide rod to guide and limit the position of the guide rod, so that when the guide rod is not contacted by the striker, under the action of gravity, it drives the baffle to reach the position of blocking the opening of the door body, maintaining the blocking effect on the door body, and realizing self-resetting by using gravity to ensure stable operation.

[0023] (3) The first striker and the second striker are distributed in a staggered manner to avoid interference. And when the driver's cab platform and the passage platform are aligned, the first striker and the second striker can respectively trigger the corresponding guide rods to realize unlocking. When in a non-aligned state, the trigger states can be respectively released, and the guide rods fall to form a lock on the door body, achieving a good protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specification drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0025] Figure 1 It is a schematic structural diagram of the mechanical interlocking safety door in the embodiment of the present utility model.

[0026] Figure 2 For Figure 1 the cross-sectional schematic view at A-A in

[0027] Figure 3 ForFigure 1 Schematic cross-sectional view taken along line B-B.

[0028] In the figure, 1. Second striking rod, 2. First striking rod, 3. First roller, 4. Guide ring, 5. First guide frame, 6. First guide rod, 7. Second guide rod, 8. Second guide frame, 9. Guide sliding rod, 10. Second roller, 12. Second limit plate, 13. Second guide support, 14. First limit plate, 15. First guide support, 16. Second door body, 17. First door body. Detailed implementation mode

[0029] In a typical implementation mode of the present utility model, as Figures 1 - 3 shown, a mechanical interlocking safety door is proposed.

[0030] The current locking structure of the crane safety door does not consider the docking state between the driver's cab platform and the external passage, resulting in the safety doors of the driver's cab platform and the passage platform being prone to accidental opening, posing a safety hazard. Based on this, this embodiment provides a mechanical interlocking safety door, which realizes the interlocking and unlocking functions of the door bodies between the driver's cab platform and the passage platform, significantly improving the safety performance.

[0031] As Figure 1 shown, the mechanical interlocking safety door mainly includes a first door body 17, a second door body 16, a first limit component and a second limit component. The first door body 17 is installed on the driver's cab platform and can rotate to control the access to the driver's cab platform. The second door body 16 is installed on the passage platform and can also rotate to control the access to the passage platform.

[0032] The first limit component is composed of a first guide rod 6 and a first baffle plate, and is installed on the driver's cab platform. The first guide rod 6 can slide axially under the action of an external force, driving the first baffle plate to move, so that the first baffle plate moves to the position where it blocks the opening of the first door body 17, or the first baffle plate leaves the position where it blocks the opening of the first door body 17, controlling the limit state of the first door body 17.

[0033] The second limit component is composed of a second guide rod 7 and a second baffle plate, and is installed on the passage platform. Its working principle is similar to that of the first limit component. The second guide rod 7 can slide axially under the action of an external force, driving the second baffle plate to move, so that the second baffle plate moves to the position where it blocks the opening of the second door body 16, or the second baffle plate leaves the position where it blocks the opening of the second door body 16, controlling the limit state of the second door body 16.

[0034] The first impact rod 2 is installed on the driver's cab platform. When the driver's cab platform is aligned with the passage platform, the first impact rod 2 can trigger the second guide rod 7 on the passage platform, causing the second baffle to move and releasing the limit on the second door body 16. The second impact rod 1 is installed on the passage platform. When the two platforms are aligned, the second impact rod 1 can trigger the first guide rod 6 on the driver's cab platform, causing the first baffle to move and releasing the limit on the first door body 17.

[0035] Traditional safety doors may not be able to ensure that the door body will not be accidentally opened when the driver's cab platform and the passage platform are not fully aligned, resulting in potential safety hazards. In this embodiment, through a mechanical interlock mechanism, it is ensured that the door body can only be unlocked and opened when the two platforms are aligned, greatly improving safety. Through a simple impact rod triggering mechanism, automatic unlocking and limiting of the door body are achieved, eliminating the need for manual operation of multiple locks and improving operation efficiency.

[0036] The mechanical structure is relatively more stable and reliable than the electronic control system, less susceptible to environmental interference or faults, ensuring safety during long-term use. It is not only applicable to specific driver's cab platforms and passage platforms, but can also be appropriately adjusted according to actual needs and applied to other similar scenarios, such as cranes with driver's cabs like yard cranes, quay cranes, ship unloaders, etc., with high flexibility and expandability.

[0037] In this embodiment, the first door body 17 and the second door body 16 are composed of a strong metal frame and anti-collision materials (such as tempered glass or metal plates) to ensure that they can withstand a certain impact and maintain structural integrity. The first door body 17 is installed at the edge of the driver's cab platform through a rotating device such as a hinge or bearing, ensuring smooth opening and closing of the door body. The structure of the second door body 16 is similar to that of the first door body 17 and is adjusted according to the specific requirements of the passage platform, such as size, opening direction, etc. The second door body 16 is also installed at the edge of the passage platform through a rotating device such as a hinge or bearing, forming a corresponding relationship with the first door body 17.

[0038] In addition to the limits controlled by the first limit component and the second limit component, the first door body 17 and the second door body 16 are also equipped with independent door lock mechanisms for manually locking the door body when necessary.

[0039] The first guide rod 6 and the second guide rod are made of high-strength and corrosion-resistant metal materials, and can be in a straight line or have a certain bend to adapt to the installation space. The first guide rod 6 and the second guide rod can also be slidably installed under or on the side of the driver's cab platform and the passage platform through devices such as slide rails or chutes, ensuring that they can move along a predetermined trajectory.

[0040] The first baffle and the second baffle are also made of strong metal materials, and their shapes and sizes are designed according to the specific structures and opening directions of the first door body 17 and the second door body 16.

[0041] The first striking rod 2 is made of a strong and easily recognizable metal material, and its shape and size are designed according to the triggering requirements. It is fixed on the edge or side of the driver's cab platform, and its position corresponds to the triggering point on the second guiding rod 7 on the access platform. When the driver's cab platform is aligned with the access platform, the first striking rod 2 contacts the triggering point on the second guiding rod 7, pushing the second guiding rod 7 to move.

[0042] The second striking rod 1 is similar to the first striking rod 2, but is installed on the access platform, triggering the first guiding rod 6 and pushing the second guiding rod 7 to move.

[0043] When the driver's cab platform is not aligned with the access platform, the first baffle blocks the opening of the first door body 17, and the second baffle blocks the opening of the second door body 16, forming a double safety protection. When the two platforms are aligned, the first striking rod 2 triggers the second guiding rod 7, causing the second baffle to move and release the limit on the second door body 16; at the same time, the second striking rod 1 triggers the first guiding rod 6, causing the first baffle to move and release the limit on the first door body 17. At this time, both the first door body 17 and the second door body 16 can be freely opened and closed, realizing the convenient passage of personnel and materials. When the two platforms are separated again, the first baffle and the second baffle automatically reset, re-limiting the door bodies for protection.

[0044] A first limiting plate 14 that rotates with the first door body 17 is provided on the first door body 17, forming a limiting structure with the first baffle. The first limiting plate 14 can be limited when it abuts against the first baffle, thereby blocking the rotation of the first door body 17, so that the first door body 17 can maintain a stable closed state when it is not allowed to open, preventing it from being opened due to accidents or misoperations. The locking safety of the first door body 17 is enhanced, ensuring that the first door body 17 cannot be opened randomly before the interlock mechanism is released.

[0045] A second limiting plate 12 that rotates with the second door body 16 is provided on the second door body 16, forming a limiting structure with the second baffle. The second limiting plate 12 can be limited when it abuts against the second baffle, thereby blocking the rotation of the second door body 16, so that the second door body 16 can maintain a stable closed state when it is not allowed to open, preventing it from being opened due to accidents or misoperations. The locking safety of the second door body 16 is enhanced, ensuring that the second door body 16 cannot be opened randomly before the interlock mechanism is released.

[0046] As Figure 3 shown, a first guiding frame 5 is installed on the driver's cab platform. The first guiding rod 6 is slidably engaged with it and slides vertically under the action of gravity, providing stable guidance, enabling the first guiding rod 6 to move smoothly without deviating from the predetermined trajectory. Ensuring the reliability and accuracy of the movement of the first guiding rod 6 provides a basis for the smooth operation of the interlock mechanism.

[0047] As Figure 2As shown, a second guide frame 8 is installed on the passage platform. The second guide rod 7 is in sliding fit with it and slides vertically under the action of gravity to provide stable guidance, enabling the second guide rod 7 to move smoothly without deviating from the predetermined trajectory. This ensures the reliability and accuracy of the movement of the second guide rod 7 and provides a basis for the smooth operation of the interlock mechanism.

[0048] Rollers are respectively installed at the bottom ends of the first guide rod 6 and the second guide rod 7. A first striker 2 is connected to the driver's cab platform, and the first striker 2 abuts against the roller to drive the second guide rod 7 to rise. A second striker 1 is connected to the passage platform, and the second striker 1 abuts against the roller to drive the first guide rod 6 to rise, providing an effective triggering mechanism so that the guide rod can be easily triggered when the platforms are aligned.

[0049] The first striker 2 and the second striker 1 are designed as L-shaped and are staggeredly distributed to ensure that when the platforms are aligned, the strikers can accurately trigger the corresponding guide rods while avoiding mutual interference.

[0050] Slopes with trapezoidal cross-sections are respectively provided at the positions where the first striker 2 and the second striker 1 abut against the rollers. When the driver's cab platform and the passage platform are aligned, the rollers are at the top of the slopes so that both the first guide rod 6 and the second guide rod 7 are triggered. When the driver's cab platform and the passage platform are aligned, the rollers can smoothly slide along the slopes to the top, thereby triggering the guide rods. This optimizes the triggering process, enables the rollers to smoothly transition to the triggering position, and reduces mechanical shock and wear.

[0051] The first baffle and the second baffle are designed to extend radially along the guide rod outside the guide rod and restrict the rotation of the door body. Ensure that the first baffle and the second baffle can effectively block the rotation of the first door body 17 and the second door body 16. This enhances the limiting effect of the baffle and further improves the safety and stability of the door body.

[0052] As Figure 1 shown, both the first guide rod 6 and the second guide rod 7 adopt a two-section structure. The upper half of the first guide rod 6 is the section connecting the first baffle, and the lower half of the first guide rod 6 is the section connecting the first roller 3. The upper half and the lower half of the first guide rod 6 are connected by fasteners. As Figure 3 shown, the upper half of the first guide rod 6 cooperates with the first guide frame 5. The first guide frame 5 is a cylindrical structure, and the upper half of the first guide rod 6 passes through the first guide frame 5 to achieve the guidance of the vertical lifting process; the lower half of the first guide rod 6 is a guide slide rod 9, which is slidably connected to the first guide support 15. A guide ring 4 through which the guide slide rod 9 passes is provided on the first guide support 15. The guide ring 4 can adopt structures such as a linear bearing and a bushing to achieve the guidance of the vertical lifting of the lower half of the first guide rod 6.

[0053] In this embodiment, the first guiding bracket 15 is cantilever-mounted outside the cab platform. The vertical lifting range of the first guiding rod 6 is controlled by the first guiding frame 5. The first guiding frame 5 is provided with vertically distributed chutes. At the sliding fit position between the first guiding rod 6 and the first guiding frame 5, there is a pin. The pin is located in the chute and slides along the chute. The sliding range of the pin in the chute is the vertical lifting range of the first guiding rod 6, so as to control the lifting range of the first guiding rod 6.

[0054] It can be understood that the pin can also adopt a screw structure. The screw can cooperate with the threaded hole on the first guiding frame 5, so as to control the lifting resistance of the first guiding rod 6 through the fitting state between the screw and the first guiding frame 5. It is also possible to lock the positions of the first guiding frame 5 and the first guiding rod 6 by tightening the screw, so that the first guiding rod 6 remains in the state of locking the first door body 17, or the first guiding rod 6 remains in the state of unlocking the first door body 17.

[0055] As Figure 1 shown, both the second guiding rod 7 and the second guiding rod 7 adopt a two-section structure. The upper half of the second guiding rod 7 is the section connecting the second baffle, and the lower half of the second guiding rod 7 is the section connecting the second roller 10. The upper half and the lower half of the second guiding rod 7 are connected by fasteners. As Figure 3 shown, the upper half of the second guiding rod 7 cooperates with the second guiding frame 8. The second guiding frame 8 is a cylindrical structure. The upper half of the second guiding rod 7 passes through the second guiding frame 8 to realize the guiding during the vertical lifting process. The lower half of the second guiding rod 7 is a guiding slide rod 9, which is slidably connected with the second guiding bracket 13. The second guiding bracket 13 is provided with a guiding ring 4 through which the guiding slide rod 9 passes. The guiding ring 4 can adopt structures such as a linear bearing and a bushing to realize the guiding of the lower half of the second guiding rod 7 during vertical lifting.

[0056] In this embodiment, the second guiding bracket 13 is cantilever-mounted outside the passage platform. The vertical lifting range of the second guiding rod 7 is controlled by the second guiding frame 8. The second guiding frame 8 is provided with vertically distributed chutes. At the sliding fit position between the second guiding rod 7 and the second guiding frame 8, there is a pin. The pin is located in the chute and slides along the chute. The sliding range of the pin in the chute is the vertical lifting range of the second guiding rod 7, so as to control the lifting range of the second guiding rod 7.

[0057] It can be understood that the pin can also adopt a screw structure. The screw can cooperate with the threaded hole on the second guiding frame 8, so as to control the lifting resistance of the second guiding rod 7 through the fitting state between the screw and the second guiding frame 8. It is also possible to lock the positions of the second guiding frame 8 and the second guiding rod 7 by tightening the screw, so that the second guiding rod 7 remains in the state of locking the second door body 16, or the second guiding rod 7 remains in the state of unlocking the second door body 16.

[0058] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mechanical interlock safety door, characterized in that: include: The first door body is rotatably mounted on the driver's cab platform; The second door body is rotatably mounted on the passage platform; The first limiting assembly includes a first guide rod and a first baffle plate connected to each other, the first guide rod is slidably mounted on the driver's cab platform, the first baffle plate faces the first door body, and when the first guide rod is triggered by the striker of the channel platform, the first guide rod drives the first baffle plate to move axially to release the limiting of the first door body; The second limiting assembly includes a second guide rod and a second baffle plate connected to each other. The second guide rod is slidably installed on the channel platform, and the second baffle plate faces the second door body. When the second guide rod is triggered by the impact rod of the driver's cab platform, the second guide rod drives the second baffle plate to move axially to contact the limiting position of the second door body.

2. The mechanical interlock safety door according to claim 1, characterized in that: The first door body is provided with a first limiting plate which rotates with the first door body. The first limiting plate and the first baffle plate are arranged opposite to each other. The first baffle plate is used to abut against the first limiting plate to block the rotation of the first door body.

3. The mechanical interlock safety door according to claim 1 or 2, characterized in that: The second door body is provided with a second limiting plate which rotates with the second door body, the second limiting plate and the second baffle plate are arranged opposite to each other, and the second baffle plate is used to abut against the first limiting plate to block the rotation of the second door body.

4. The mechanical interlock safety door according to claim 1, characterized in that: A first guide frame is installed on the driver's cab platform, and a first guide rod is slidably matched with the first guide frame. The first guide rod slides vertically relative to the first guide frame under the action of gravity.

5. The mechanical interlock safety door according to claim 4, characterized in that: A second guide frame is installed on the driver's cab platform, and the second guide rod is slidably matched with the second guide frame. The second guide rod slides vertically relative to the second guide frame under the action of gravity.

6. The mechanical interlock safety door according to claim 1, 4 or 5, characterized in that: The bottom ends of the first guide rod and the second guide rod are respectively installed with rollers, the first impact rod is connected to the driver's cab platform, the first impact rod abuts the roller to drive the second guide rod to rise, and the second impact rod is connected to the channel platform, the second impact rod abuts the roller to drive the first guide rod to rise.

7. The mechanical interlock safety door according to claim 6, characterized in that: The first impact rod and the second impact rod are both L-shaped and staggered.

8. The mechanical interlock safety door according to claim 6 or 7, characterized in that: The positions where the first impact rod and the second impact rod abut against the roller are respectively provided with slopes with trapezoidal cross-sections. When the cab platform and the channel platform are aligned, the rollers are at the top of the slopes, so that both the first guide rod and the second guide rod are triggered.

9. The mechanical interlock safety door according to claim 1, characterized in that: The first baffle is connected to the top end of the first guide rod, and the first baffle extends radially along the first guide rod to the outside of the first guide rod. One end of the first baffle located outside the first guide rod constrains the rotation of the first door body.

10. The mechanical interlock safety door according to claim 1 or 9, characterized in that: The second baffle is connected to the top end of the second guide rod, and the second baffle extends radially along the second guide rod to the outside of the second guide rod. One end of the second baffle located outside the second guide rod constrains the rotation of the second door body.

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