A gate structure for a crane

Abstract

The utility model provides a kind of door bar structure for crane, including pedestal, stand, door bar main part and lock connection component.Pedestal is fixed in maintenance passageway, stand is vertically arranged on pedestal, door bar main part is hinged with stand by hinge, and passageway can be rotated to open and close.Lock connection component includes lock block that is rotatably connected in the top of stand by pin shaft, lock block is equipped with the slot of the notch of down, and door bar main part is correspondingly equipped with clamping portion.Close when rotating lock block to make clamping portion enter notch, and lock block is compressed tightly door bar main part to realize locking under the action of gravity;When opening, reverse rotation lock block makes clamping portion to be out of.The structure solves the problem that traditional door bar lock tongue and lock hole are difficult to align, locking is reliable, has good fault tolerance and security, and is suitable for the protection of crane maintenance passageway.

Description

Technical Field

[0001] This utility model relates to the field of crane maintenance technology, and more specifically, to a gate structure for use on cranes. Background Technology

[0002] In industrial plants, logistics warehousing centers, and large production workshops, cranes are core equipment for handling heavy objects and transferring production materials. Their operational stability directly impacts production efficiency and operational safety. In these scenarios, cranes are often installed along elevated tracks. Maintenance or adjustment work requires workers to enter high-altitude maintenance access channels alongside the tracks. These channels are narrow and level with the crane tracks, posing a high risk of falls. To meet the safety requirements for working at heights in production equipment, access channels must be equipped with gate structures to physically isolate personnel from accidental falls and prevent tools and materials from falling and affecting operations below.

[0003] However, existing gate barriers mostly use metal frame structures with fixed dimensions, only suitable for gate frames of a single width. In practical applications, the width of crane maintenance access gate frames produced by different manufacturers varies, and long-term use of the same access passage and minor collisions can easily cause slight bending and deformation on the opening side of the gate barrier (the side away from the hinge). In this case, it is difficult to precisely align the fixed-size gate barrier latch with the lock hole in the gate frame, requiring workers to repeatedly adjust the gate barrier position to complete the locking. This not only prolongs maintenance preparation time but also poses a risk of an unstable lock. When the gate barrier is not fully locked, if personnel working in the passage accidentally bump into it, the barrier may open unexpectedly, directly causing a fall accident and significantly reducing the safety of the access passage. Utility Model Content

[0004] The main technical problem this application addresses is the difficulty in aligning and locking the gate rails. To overcome the shortcomings of the prior art, this application provides a gate rail structure for use on cranes.

[0005] This application provides a gate structure for use on a crane, comprising: A base is fixedly installed at the maintenance access point of the crane, and a vertically extending support is fixedly connected to the base for providing support. The gate body is hinged to the frame, with the side away from the hinge being the opening side. The gate body can rotate around the hinge to open and close the maintenance passage. The locking assembly includes a locking block and a pin. The locking block is rotatably connected to the top of the frame via the pin. The axial direction of the pin is perpendicular to the extension direction of the frame. The locking block has a downward-facing slot. The gate body has a locking part at a position flush with the top of the frame. The locking part is adapted to be locked into the slot. When the gate body closes the maintenance access, the locking block is rotated toward the gate body, and the locking part enters through the slot and engages in the slot. Under the action of gravity, the locking block is pressed onto the gate body, locking the gate body in place. When the locking block is rotated away from the gate body, the locking part disengages from the slot, allowing the gate body to rotate around the support frame to open the maintenance access.

[0006] Compared with existing technologies, the gate structure for cranes disclosed in this application has the following advantages: The locking block rotates around the top of the support frame via a pin, with the slot facing downwards and adapting to the locking part of the gate body. This eliminates the need for strict alignment of the latch and lock hole; simply rotating the locking block completes the locking, avoiding repeated adjustments to the gate position and solving the problem of locking alignment. When the gate is closed, the locking block presses against the gate body under its own weight, forming a stable locking force. This avoids the hidden danger of "unintentional opening of the gate due to weak locking" found in existing technologies, physically preventing accidents such as personnel falls and material spills, and ensuring the stability of the locking. Compared to fixed-size latch structures, the design of "locking block rotation and locking part adapting to the slot" is compatible with slight bending deformation on the opening side of the gate caused by long-term use or impact, allowing for normal locking without replacing the gate, thus improving the practicality and durability of the structure.

[0007] In one possible implementation, the locking part is a horizontal bar located at the top of the gate frame body, and the outer diameter of the horizontal bar is smaller than the width of the locking groove. Compared with the prior art, the horizontal bar structure is simple and easy to process, eliminating the need for additional complex locking structures on the gate frame body, reducing processing steps and costs. Furthermore, the horizontal bar and the gate frame body are integrally formed, making it convenient to use. The smaller outer diameter of the horizontal bar compared to the width of the locking groove allows for a certain fitting gap, ensuring that even if the gate frame experiences slight displacement due to deformation, the horizontal bar can still smoothly enter the locking groove, further improving locking efficiency.

[0008] In one possible implementation, the locking block is provided with an operating part for an operator to grip and drive the locking block to rotate around the pin. Compared with the prior art, the operating part provides the operator with a clear grip and force application point, avoiding operational jamming due to "not being able to find the force application point" during operation, and can quickly drive the locking block to rotate around the pin, shortening the operation time. The clear operating part reduces the time the operator spends at the passageway, indirectly improving operational safety.

[0009] In one possible implementation, the operating part is the outer surface of the locking block, and the outer surface is provided with anti-slip texture. Compared with the prior art, the anti-slip texture can significantly improve the friction between the hand and the operating part, enabling a stable grip, preventing the locking block from slipping out of the hand during operation and ensuring the accuracy of the locking block's rotation operation, and reducing locking failures due to operational errors.

[0010] In one possible implementation, the hinge is a hinge structure comprising a fixed hinge and a rotating hinge. The fixed hinge is fixed to the support frame, and the rotating hinge is fixed to the gate frame body. Compared with the prior art, the hinge structure is a mature rotating connection solution that ensures that the gate frame body rotates around the support frame without jamming, avoiding the need for operators to exert force due to poor rotation, and reducing structural wear on the gate frame body and the support frame.

[0011] In one possible implementation, both ends of the pin are provided with limiting caps, the outer diameter of which is larger than the hole diameter at the connection between the locking block and the upright, to prevent the locking block from falling off the pin. Compared with the prior art, the limiting caps can form a physical barrier from both ends of the pin, preventing the locking block from falling off the pin during long-term rotation (or vibration environment), and avoiding the door frame from failing to lock due to the loss of the locking block.

[0012] In one possible implementation, a position switch is provided at the bottom of the support frame on the side facing the gate body to detect whether the gate body is in a locked state. Compared with the prior art, the position switch can provide real-time feedback on the locking status and issue an early warning if the gate is not locked, thus preventing the danger of "entering the passage with the gate unlocked".

[0013] In one possible implementation, a first magnet is fixed within the slot, and a second magnet matching the first magnet is provided on the engaging portion. When the engaging portion is engaged within the slot, the first and second magnets attract each other. Compared to existing technologies, the magnetic attraction force can guide the engaging portion to move automatically towards the slot, assisting operators in quickly completing the engagement and reducing alignment time. The magnetic attraction can supplement the gravitational pressure of the locking block; even if the gate is subjected to slight impact (such as accidental tool contact), the magnetic attraction force can prevent the engaging portion from detaching from the slot, significantly improving the gate's anti-interference capability. When the crane vibrates during operation, the magnetic attraction can offset some of the vibration impact force, preventing the engaging portion and slot from loosening due to vibration, further ensuring the stability of the locking state. Attached Figure Description

[0014] Figure 1 This is a front view of this application; Figure 2 for Figure 1 Cross-sectional view of AA in the middle; Figure 3 This is a side view of this application; Figure 4 This is a top view of this application; Figure 5 This is a structural diagram of the main gate structure; Explanation of reference numerals in the attached figures: 1. Base; 2. Frame; 3. Gate frame body; 31. Crossbar; 4. Locking assembly; 41. Locking block; 411. Slot; 42. Pin; 5. Hinge; 6. Position switch. Detailed Implementation

[0015] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0016] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0017] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] See Figures 1 to 5 This application discloses a gate structure for use on a crane, including a base 1, a frame 2, a gate body 3, and a locking assembly 4.

[0020] The base 1 is made of steel plate and is firmly fixed to the steel structure platform at the crane maintenance access point by welding to ensure that the base 1 has no relative displacement.

[0021] The support frame 2 is a stainless steel square tube structure, and its length is designed according to the channel protection requirements. Its bottom is fixedly connected to the center of the upper surface of the base 1 by bolt fastening. The support frame 2 is set vertically to ensure the stability of the support.

[0022] The gate body 3 is hinged to the frame 2 via hinge 5. The gate body 3 is made of welded steel pipe, and the frame size is adapted to the maintenance passage opening. The hinge 5 is a stainless steel hinge (multiple sets are evenly distributed along the height of the frame 2). The fixing hinge is fixed to the frame 2 with screws, and the rotating hinge is fixed to the vertical bar of the gate body 3 near the frame 2 with screws of the same specification. The gate body 3 can rotate around the hinge 5 to meet the opening and closing requirements of the passage. The side away from the hinge 5 is the opening side.

[0023] The locking assembly 4 includes a locking block 41 and a pin 42. The locking block 41 is a rectangular stainless steel block with a through hole on one side that matches the pin 42. It is fitted onto the pin 42 through the through hole to achieve a rotatable connection with the top of the support frame 2. The pin 42 is axially perpendicular to the vertical of the support frame 2, ensuring that the locking block 41 can swing between vertical and horizontal directions. A downward-facing slot 411 is formed on the side of the locking block 41 away from the through hole. The slot 411 has a U-shaped cross-section. The gate frame body 3 has a locking part at a position flush with the top of the support frame 2. The locking part is sized to match the slot 411 to ensure smooth engagement.

[0024] The procedure for opening and closing the maintenance access gate 3 is as follows: When the gate body 3 is rotated to the closed maintenance access gate position, the operator manually pushes the locking block 41 towards the gate body 3, causing the locking part to enter the slot 411 through the opening. After releasing the locking block 41, it naturally presses down under its own weight, and its slot 411 engages with the locking part of the gate body 3, thus locking and fixing the gate body 3. When the operator lifts the end of the locking block 41 away from the gate body 3, driving the locking block 41 to rotate around the pin 42, the slot 411 separates from the locking part, and the locking part disengages from the slot 411. Then, the operator pushes the gate body 3 to rotate around the support frame 2, thereby opening the maintenance access gate. The entire operation does not require repeated adjustments and alignment, solving the problem of difficult alignment of existing gate lock tongues.

[0025] In this embodiment, the locking part is an integrated crossbar 31 at the top of the gate body 3, which is made of the same steel pipe as the gate body 3. The outer diameter of the crossbar 31 is smaller than the width of the slot 411. Even if the gate body 3 is slightly bent and deformed due to long-term use, the crossbar 31 can still smoothly enter the slot 411 without repeatedly adjusting the gate position, making the gate convenient to use.

[0026] In this embodiment, the locking block 41 is provided with an operating part, which is the outer surface of the locking block 41. When it is necessary to drive the locking block 41 to rotate, the operator can hold the operating part with one hand and drive the locking block 41 to rotate around the pin 42 by pulling upward or pressing downward on the operating part, which is suitable for one-handed operation and avoids slippage due to lack of grip.

[0027] In this embodiment, a diamond-shaped anti-slip texture is formed on the outer surface by stamping, covering the entire gripping area. The anti-slip texture increases the friction between the hand and the operating part, allowing the operator to maintain a stable grip on the operating part even if their hands are covered with oil, dust, or sweat, preventing slippage that could cause the locking block 41 to malfunction and improving operational safety.

[0028] In this embodiment, both ends of the pin 42 are provided with limiting caps, which are integrally forged with the pin 42. The outer diameter of the caps is larger than the diameter of the through hole at the connection between the locking block 41 and the support frame 2, forming a stepped limiting mechanism. This not only does not affect the rotation of the locking block 41, but also completely prevents the locking block 41 from falling off the pin 42, thus avoiding failure of the locking assembly 4.

[0029] In this embodiment, a position switch 6 is provided on the bottom side of the support frame 2 facing the gate body 3. The position switch 6 is a rocker contact limit switch. When the gate body 3 is locked, the bottom of the gate body 3 will press the trigger rocker, causing the internal contacts of the switch to close and output a "locked in place" signal. When the gate body 3 is not locked or is open, the trigger contacts reset and the switch outputs an "not locked" signal. This signal can be connected to the control system. If the gate is not locked, the control system will trigger the workshop's audible and visual alarm to remind staff to handle the situation and avoid the risk of accidental falls.

[0030] In this embodiment, a first magnet is embedded and fixed on the inner wall of the U-shaped slot 411 of the locking block 41; correspondingly, a second magnet is also fixed on the top crossbar 31 of the gate body 3, directly opposite the first magnet. When the locking block 41 is rotated to engage the locking part into the slot 411, the first magnet and the second magnet are aligned and attracted to each other under the action of magnetic force; this additional magnetic attraction helps the locking block 41 to fall into place faster and more stably, and resists slight vibrations or external interference, making the locking state more stable, while also giving the operator a clear "attracting" feel, indicating that the locking operation has been completed, thus improving the locking efficiency.

[0031] The beneficial effects of this application include: First, by setting a rotatable locking block 41 and a matching snap-fit ​​part, the problem of difficulty in aligning the traditional door bolt and lock hole is effectively solved.

[0032] Second, the locking block 41 automatically presses the locking part under the action of gravity to ensure a firm lock and prevent accidental opening due to vibration or collision, thus significantly improving safety performance.

[0033] Third, it has good tolerance for door and railing deformation due to long-term use, eliminating the need for frequent adjustments or replacements, thus enhancing practicality and durability.

[0034] Fourth, the addition of an anti-slip operating part, limit cap, position switch 6, and magnetic auxiliary structure further improves the convenience, reliability, and status monitoring of operation, ensuring personnel safety.

[0035] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0036] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gate structure for use on a crane, characterized in that, include: A base is fixedly installed at the maintenance access point of the crane, and a vertically extending support is fixedly connected to the base for providing support. The gate body is hinged to the frame, with the side away from the hinge being the opening side. The gate body can rotate around the hinge to open and close the maintenance passage. The locking assembly includes a locking block and a pin. The locking block is rotatably connected to the top of the frame via the pin. The axial direction of the pin is perpendicular to the extension direction of the frame. The locking block has a downward-facing slot. The gate body has a locking part at a position flush with the top of the frame. The locking part is adapted to be locked into the slot. When the gate body closes the maintenance access, the locking block is rotated toward the gate body, and the locking part enters through the slot and engages in the slot. Under the action of gravity, the locking block is pressed onto the gate body, locking the gate body in place. When the locking block is rotated away from the gate body, the locking part disengages from the slot, allowing the gate body to rotate around the support frame to open the maintenance access.

2. The gate structure for a crane according to claim 1, characterized in that, The latching part is a horizontal bar located at the top of the gate frame body, and the outer diameter of the horizontal bar is smaller than the width of the latching groove.

3. The gate structure for a crane according to claim 1, characterized in that, The locking block is provided with an operating part for the operator to hold and drive the locking block to rotate around the pin shaft.

4. The gate structure for a crane according to claim 3, characterized in that, The operating part is the outer surface of the locking block, and the outer surface is provided with anti-slip texture.

5. The gate structure for a crane according to claim 1, characterized in that, The hinge is a hinge structure, which includes a fixed hinge and a rotating hinge. The fixed hinge is fixed to the upright, and the rotating hinge is fixed to the door frame body.

6. The gate structure for a crane according to claim 1, characterized in that, Both ends of the pin are provided with limit caps. The outer diameter of the limit caps is larger than the hole diameter at the connection between the locking block and the upright, in order to prevent the locking block from falling off the pin.

7. The gate structure for a crane according to claim 1, characterized in that, The bottom of the support frame is equipped with a position switch on the side facing the gate body, which is used to detect whether the gate body is in a locked state.

8. The gate structure for a crane according to claim 1, characterized in that, A first magnet is fixed inside the slot, and a second magnet matching the first magnet is provided on the latching part. When the latching part is engaged in the slot, the first magnet and the second magnet attract each other.

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