A safe frame for grain warehouse to go in and out of grain

Abstract

The utility model discloses a kind of grain storehouse grain safety frame, including upper frame;Two support frames are symmetrically fixed and connected along the length direction of the upper frame, and beam body is fixed and connected in length direction in middle part;The lower end of the beam body is fixed and connected with slide rail;Slide rail is equipped with the pulley movable relative to the length direction of slide rail;The middle part of the pulley is detachably connected with connecting piece;The lower end of the connecting piece is detachably connected with fixed ring.The utility model is characterized in that: by setting the moving anchor point structure of slide rail, pulley and fixed ring, compared with the anchor point of traditional single fixed, moving anchor point is always kept in the top of the head of operator, fundamentally eliminates the risk of swing, significantly reduces the falling impact distance, effectively reduces the risk of staff injury.

Description

Technical Field

[0001] This utility model relates to the field of grain warehouse access safety, and in particular to a grain warehouse access safety rack. Background Technology

[0002] Grain is stored in grain silos, and the loading and unloading of grain in large silos is usually done by truck. Unloading grain requires personnel to climb onto the truck bed for assistance. This process places workers directly in an unprotected high-altitude environment, posing an extremely high risk of fall injury or death. Traditional protection methods typically use a single fixed anchor point. When personnel are working away from this anchor point, a fall will create a huge pendulum effect (i.e., "swing"), causing secondary collisions with the ground, the truck bed, or other hard objects, resulting in serious injury. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a safety rack for grain entering and leaving a grain warehouse.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A grain storage and grain handling safety frame includes an upper frame; two support frames are symmetrically fixed to both sides of the upper frame along its length, and a beam is fixed to the middle along its length; a slide rail is fixed to the lower end of the beam; a pulley is provided in the slide rail that can move relative to the length of the slide rail; a connector is detachably connected to the middle of the pulley; and a fixing ring is detachably connected to the lower end of the connector.

[0006] Furthermore, a strip-shaped cavity is provided inside the slide rail; the pulley is located inside the strip-shaped cavity and can move relative to the slide rail.

[0007] Furthermore, a strip-shaped hole communicating with the strip-shaped cavity is provided below the slide rail; the connector extends from the strip-shaped hole into the strip-shaped cavity and is detachably connected to the pulley.

[0008] Furthermore, there is a gap between the two ends of the pulley and the strip cavity; the two ends of the slide rail are also fixedly connected with covers to prevent the pulley from sliding out of the strip cavity.

[0009] Furthermore, the lower end of the support frame is detachably connected to wheels for movement.

[0010] Furthermore, a hand-cranked jack for raising the wheels is fixedly connected to the lower side wall of the support frame.

[0011] Furthermore, a ladder is vertically fixed to one of the support frames.

[0012] Furthermore, the upper frame is fixedly connected to the inner sides of its four corners with first diagonal braces.

[0013] Furthermore, both ends of the two support frames are stabilized by crossbars, and the four corners of the two support frames are fixed to the upper frame with second diagonal braces.

[0014] The beneficial effects of this utility model are:

[0015] By setting up a movable anchor point structure consisting of slide rails, pulleys, and fixed rings, compared to the traditional single fixed anchor point, the movable anchor point is always kept directly above the operator's head, fundamentally eliminating the risk of swinging, significantly reducing the fall impact distance, and effectively reducing the risk of injury to workers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 A schematic diagram of the combined structure of the beam and the slide rail;

[0018] Figure 3 This is a bottom view of the slide rail;

[0019] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0020] In the picture,

[0021] 1-Upper frame, 2-Support frame, 3-Beam, 4-Slide rail, 5-Pulley, 6-Connector, 7-Fixing ring, 8-Ladder;

[0022] 11-First diagonal brace;

[0023] 21-Wheel, 22-Hand-cranked jack, 23-Horizontal bar, 24-Second diagonal brace;

[0024] 41-Strip-shaped cavity; 42-Strip-shaped hole; 43-Cover body; Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Reference Figure 1-4As shown, a grain storage safety frame is primarily used in grain storage, processing, and transportation, especially for loading, unloading, sampling, or maintenance operations on open grain trucks, silo tops, or pits. It provides operators with a reliable and flexible overhead fall protection anchor point. The safety frame has a gantry or bridge-type structure, including an upper frame 1. Two support frames 2 are symmetrically fixed to both sides of the upper frame 1 along its length, and a beam 3 is fixed to the middle along its length. A slide rail 4 is fixed to the lower end of the beam 3. The slide rail 4 contains pulleys 5 that can move relative to the length of the slide rail 4. A connecting piece 6 is detachably connected to the middle of the pulley 5. A fixing ring 7 is detachably connected to the lower end of the connecting piece 6. The support frames 2 extend vertically downwards from the bottom of the upper frame 1 to stably support the entire safety frame on the ground. Each support frame 2 can be designed as an "H" shape to provide a wider support base, thereby enhancing overall lateral stability and preventing overturning. The support frame 2 is preferably made of the same or similar metal material as the upper frame 1, such as rectangular steel pipe or I-beam. The function of the support frame 2 is to safely transfer all loads (including the equipment's own weight and working load) from the upper frame 1 to the ground. The beam 3 can be an I-beam or a specially reinforced beam, with both ends firmly connected to two opposite crossbeams of the upper frame 1. The beam 3 is the direct mounting carrier for the slide rail 4, and its core function is to concentrate the working load transmitted through the slide rail 4, especially the impact force during a fall, and distribute it throughout the upper frame 1. The slide rail 4 is the key component for realizing the movement of the anchor point, extending along the entire length of the beam 3. The slide rail 4 can be made of, for example, high-strength extruded aluminum alloy or special steel, with a precise internal track profile. The slide rail 4 provides a smooth, restricted movement path for the pulley 5, allowing the anchor point connected to the operator's safety rope to move freely with the operator, always remaining above the operator, thereby minimizing the swaying effect during a fall and improving the effectiveness of safety protection.

[0027] It should be noted that the upper frame 1, as the main load-bearing structure of the safety frame, is constructed as a horizontally arranged rectangular or square frame. The upper frame 1 can be made of high-strength low-alloy steel, such as Q345B or higher strength steel, and is formed as a whole through welding or high-strength bolt connections to ensure sufficient strength and rigidity to withstand the impact load generated by accidental falls. The main function of the upper frame 1 is to construct the platform structure at the top of the entire equipment and provide a stable installation foundation for the beam 3, evenly distributing the load from the beam 3 to the support frames 2 on both sides. The pulley 5 is the core moving component of the moving anchor point. It preferably adopts a roller structure with high-precision sealed bearings, and the material can be wear-resistant alloy steel to ensure that it can still roll smoothly and with low friction within the slide rail 4 under load. The function of the pulley 5 is to bear the entire load from the connecting piece 6 and apply this load to the slide rail 4 through rolling, realizing the flexible movement of the anchor point. The connecting piece 6 is the transition component connecting the pulley 5 and the fixing ring 7. It can be a high-strength bolt with a locking nut, a pin, or a specially designed quick-connect coupling. The "detachable" feature of connector 6 is of great significance, allowing users to easily perform regular safety checks, maintenance, lubrication, or replacement of pulley 5 and retaining ring 7, ensuring the long-term reliability of critical load-bearing components. Retaining ring 7 is the final interface of the entire safety system. Operators establish a reliable fall-protection connection with the entire safety frame by attaching the lanyard of their safety harness (e.g., a full-body harness conforming to GB6095-2021) or the main locking buckle of the fall arrestor (e.g., a TX-20 fall arrestor) to retaining ring 7. Retaining ring 7 is typically a D-ring or O-ring forged from high-strength alloy steel with an anti-corrosion surface treatment. Its function is to provide a standard and reliable attachment point for external safety equipment.

[0028] Specifically, in order to accommodate the pulley 5, a strip-shaped cavity 41 is provided inside the slide rail 4; the pulley 5 is located inside the strip-shaped cavity 41 and can move relative to the slide rail 4. The cross-sectional shape of the strip-shaped cavity 41 matches the outer contour of the pulley 5 to ensure that the pulley 5 can only move linearly along the track direction within the cavity 41, and cannot be twisted or dislodged, thus ensuring the guidance and safety of the movement.

[0029] Specifically, to enable the connector 6 to connect with the pulley 5 located inside the strip cavity 41, a strip-shaped hole 42 communicating with the strip cavity 41 is provided below the slide rail 4; the connector 6 extends into the strip cavity 41 through the strip-shaped hole 42 and is detachably connected to the pulley 5. The width of the strip-shaped hole 42 is smaller than the maximum internal width of the strip cavity 41, and also smaller than the diameter or body width of the pulley 5. In this way, the rod of the connector 6 can pass through the strip-shaped hole 42 and extend into the strip cavity 41 to connect with the pulley 5, while the body of the pulley 5 is confined inside the strip cavity 41 and cannot fall through the narrow strip-shaped hole 42. This design cleverly achieves internal accommodation and external connection of the moving parts.

[0030] Specifically, there is a gap between the two ends of the pulley 5 and the strip cavity 41; the two ends of the slide rail 4 are also fixedly connected to the cover 43 to prevent the pulley 5 from sliding out of the strip cavity 41. The gap design can compensate for thermal expansion and contraction caused by temperature changes, preventing the pulley from jamming; on the other hand, it also ensures the smooth movement of the pulley. In order to fundamentally prevent the pulley 5 from sliding out of the strip cavity 41 due to extreme conditions (such as violent impact or rapid movement to the end), the cover 43 is also fixedly connected to both ends of the slide rail 4 along its length. The cover 43 can be a thick metal plate fixed by bolts or a stop directly welded to the end of the slide rail. As a physical limiting device, it is a double safety guarantee to ensure that the pulley assembly does not fall off the rail.

[0031] Specifically, to facilitate the movement of the entire safety frame, the lower end of the support frame 2 is detachably connected to wheels 21 for movement. Preferably, the wheels 21 are heavy-duty industrial swivel casters, such as polyurethane (PU) casters with brakes. The swivel design allows the frame to move and turn flexibly in any direction, while the braking function locks the wheels after the frame is in place for initial fixation. The detachable design of the wheels 21 facilitates reducing packaging volume during transportation or removing the wheels to increase stability during long-term fixed use, and also facilitates the replacement of worn casters.

[0032] Specifically, to achieve absolute stability during operation and prevent the frame from sliding due to uneven ground or accidental external forces, hand-cranked jacks 22 for raising the wheels 21 are fixedly connected to the lower side wall of the support frame 2. Preferably, one hand-cranked jack 22 is installed near each of the four corners of each support frame 2, such as a SWL-2.5T worm gear screw jack. Its working principle is as follows: after the safety frame moves to the predetermined working position, the operator cranks the handle, causing the jack's support legs to extend downwards and contact the ground. Continuing to crank will lift the entire support frame 2 along with the wheels 21 upwards, completely detaching the wheels 21 from the ground. At this point, the weight of the entire safety frame is rigidly supported on the ground by four or more jacks, forming an extremely stable and immovable working platform. This design greatly improves safety during operation and is an important technical feature of this utility model.

[0033] Specifically, to facilitate safe and convenient access for operators to climb the frame for equipment inspection or auxiliary work, a ladder 8 is vertically fixed to one of the support frames 2. The ladder 8 features a non-slip step design and its structure is integrated with the support frame 2, providing a safe passage for personnel to go up and down, avoiding the inconvenience and risks of carrying and setting up a separate ladder.

[0034] Specifically, in order to increase the structural rigidity of the upper frame 1 and prevent it from undergoing rectangular deformation (i.e., "stretching" or "compressing" into a parallelogram) under stress, first diagonal braces 11 are fixedly connected to the inner sides of the four corners of the upper frame 1. The first diagonal braces 11 can be triangular stiffeners or diagonal struts. They utilize the stability principle of triangles to greatly enhance the torsional and shear resistance of the upper frame 1, ensuring that the geometry of the frame remains unchanged under load.

[0035] Specifically, to further ensure the stability of the overall structure, both ends of the two support frames 2 are secured by crossbars 23, and second diagonal braces 24 are fixed at the four corners where the two support frames 2 are fixed to the upper frame 1. These crossbars 23 prevent the legs of the support frames 2 from opening outwards or inwards, maintaining the geometric dimensions of the support base. Simultaneously, second diagonal braces 24 are also fixedly connected at the four corners where the two support frames 2 are fixed to the upper frame 1. The function of the second diagonal braces 24 is similar to that of the first diagonal braces 11; they strengthen this critical load-bearing node between the upper frame 1 and the support frames 2, effectively dispersing stress concentration at the node, preventing structural failure due to excessive bending moment, thereby improving the load-bearing capacity and safety factor of the entire safety frame.

[0036] The working principle of this utility model:

[0037] When working at height is required, the operator first moves the entire safety frame directly above the work area, such as above the opening of a grain truck, using the wheels 21 at the bottom. Once in position, the brakes on the wheels 21 are applied for initial fixation. Then, the operator uses the crank handle to operate the four hand-cranked jacks 22 sequentially, bringing their support feet to the ground and lifting the wheels 21 off the ground, thus securing the entire frame firmly to the ground and forming an immovable working platform. The operator wears a full-body safety harness, connected to the fixing ring 7 below the slide rail 4 via a rope or speed differential controller. During operation, as the operator moves along the length of the grain truck, the pulleys 5 automatically and smoothly roll within the slide rail 4, ensuring the fall arrest anchor point remains directly above the operator's head. In the event of a fall, the impact force will be quickly transmitted to the slide rail 4 and the entire frame through the safety belt, rope, fixing ring 7, connector 6 and pulley 5. The speed differential controller will lock immediately, suspending the person in the air. Since the anchor point is directly above, it effectively avoids secondary injury from swinging and collision, thus providing the highest level of safety protection.

[0038] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A grain storage and grain handling safety rack, characterized in that: It includes an upper frame (1); two support frames (2) are symmetrically fixed to both sides of the upper frame (1) along the length direction, and a beam (3) is fixed to the middle along the length direction; a slide rail (4) is fixed to the lower end of the beam (3); a pulley (5) is provided in the slide rail (4) and can move relative to the length direction of the slide rail (4); a connector (6) is detachably connected to the middle of the pulley (5); a fixing ring (7) is detachably connected to the lower end of the connector (6).

2. The grain storage and grain handling safety rack according to claim 1, characterized in that: The slide rail (4) has a strip-shaped cavity (41); the pulley (5) is located in the strip-shaped cavity (41) and can move relative to the slide rail (4).

3. The grain storage and grain handling safety rack according to claim 2, characterized in that: The slide rail (4) has a strip hole (42) below it that communicates with the strip cavity (41); the connector (6) extends from the strip hole (42) into the strip cavity (41) and is detachably connected to the pulley (5).

4. The grain storage and grain handling safety rack according to claim 2, characterized in that: There is a gap between the two ends of the pulley (5) and the strip cavity (41); the two ends of the slide rail (4) are also fixedly connected with a cover (43) to prevent the pulley (5) from sliding out of the strip cavity (41).

5. The grain storage and grain handling safety rack according to any one of claims 1 to 4, characterized in that: The lower end of the support frame (2) is detachably connected to wheels (21) for movement.

6. The grain storage and grain handling safety rack according to claim 5, characterized in that: A hand-cranked jack (22) for raising the wheel (21) is fixedly connected to the lower side wall of the support frame (2).

7. The grain storage and grain handling safety rack according to any one of claims 1 to 4, characterized in that: A ladder (8) is vertically fixed to one of the support frames (2).

8. The grain storage and grain handling safety rack according to any one of claims 1 to 4, characterized in that: The upper frame (1) has first diagonal braces (11) fixed to the inner sides of its four corners.

9. The grain storage and grain handling safety rack according to any one of claims 1 to 4, characterized in that: Both ends of the two support frames (2) are stabilized by crossbars (23), and the four corners of the two support frames (2) and the upper frame (1) are fixed with second diagonal braces (24).

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