Fall arrest scapegoat device for roll mechanisms

Abstract

The scapegoat device for preventing falling of a roller mechanism relates to the technical field of roller extrusion equipment and comprises a safety block, which is configured to automatically rotate to a vertical state and wedge between an upper roller assembly and a lower roller assembly to form a physical block when the upper roller assembly is lifted to a preset position; an elastic locking mechanism, which is configured to turn the safety block outward after the upper roller assembly is lifted to the preset position and can resist the safety block to limit the reset of the safety block through the gravity of the safety block, so that the safety block is in an open state; and a sensing monitoring mechanism, which comprises an upper sensor and a lower sensor, the lower sensor is used for monitoring whether the safety block is wedged in place, and the upper sensor is used for monitoring whether the safety block is in the open state. The utility model discloses a gravity trigger type safety block which is automatically wedged between rollers to form a rigid block, thereby completely eliminating the risk of manual intervention; the pure mechanical locking mechanism is used for realizing the self-locking and manual unlocking of the block, thereby avoiding the fault hidden danger of electric control / pneumatic elements.

Description

Technical Field

[0001] This utility model relates to the field of roller extrusion equipment technology, and in particular to a scapegoat device for preventing the roller mechanism from falling. Background Technology

[0002] In industrial manufacturing, roller mechanisms are widely used in processes such as rolling and forming, where material processing is achieved through the relative movement of upper and lower rollers. However, this mechanism presents a significant safety hazard: when the upper roller is raised to the working position, it may unexpectedly descend due to insufficient holding pressure or accidental button press by the operator, potentially trapping and injuring the operator positioned between the two rollers. To address this, the industry has developed a fall arrestor device known as a "scapegoat." Its core function is to automatically or semi-automatically insert a physical obstacle after the upper roller is raised, preventing it from falling accidentally and ensuring operational safety.

[0003] Currently, common scapegoat devices mainly fall into two categories. One is the manual placement of pads, where operators manually place pads between the upper and lower roller bearing seats after the upper roller is raised to its position, acting as a physical barrier. The other is a pneumatic pin system, which uses a cylinder to drive the pads to push and pull, with a solenoid valve controlling the air circuit to insert and remove the pads; when the upper roller rises, the cylinder pushes the pad into the working position, and when it closes, it pulls the pad out. While both methods provide protection to some extent, they both have inherent flaws. Manual pad placement relies entirely on the operator's conscientiousness; in practice, workers may forget, neglect, or omit the placement step to save time, resulting in a lack of safety barrier. Furthermore, human factors increase the uncertainty of operation, making it impossible to ensure the reliability of each operation. While the pneumatic pin system reduces manual intervention, it relies on complex electronic control components (such as solenoid valves and circuits). In actual operation, it is prone to failure due to solenoid valve jamming, circuit malfunctions, or control signal delays, resulting in the pads not being inserted or removed in time, thus reducing the overall level of safety.

[0004] Further analysis reveals that these deficiencies stem from the over-reliance of existing technologies on manual or external actuators. Manual solutions cannot eliminate human weaknesses, while pneumatic systems introduce more potential failure points due to the inclusion of pneumatic or electric components, especially in dusty or humid industrial environments where solenoid valves and circuits are more prone to failure. Therefore, existing scapegoat devices have significant shortcomings in safety and reliability, urgently requiring a solution that can operate automatically without human intervention and has a simple structure. This is precisely the core problem addressed by this invention. Utility Model Content

[0005] The purpose of this invention is to address the deficiencies in the prior art by providing a scapegoat device for preventing the roller mechanism from falling.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a scapegoat device for preventing the roller mechanism from falling, comprising:

[0007] The safety stop is configured to automatically rotate to a vertical position by its own gravity and wedge between the upper roller assembly and the lower roller assembly to form a physical block when the upper roller assembly is raised to a preset position.

[0008] The elastic locking mechanism is configured such that when the upper roller assembly is raised to a preset position, the safety stop block can be flipped outward and pressed against the safety stop block to prevent it from resetting by its own gravity, thereby putting the safety stop block in the open state.

[0009] The sensing and monitoring mechanism includes an upper sensor and a lower sensor. The lower sensor is used to monitor whether the safety stop is wedged into place, and the upper sensor is used to monitor whether the safety stop is in the open state.

[0010] Preferably, the safety stop is rotatably connected to the bottom left side of the upper roller assembly via a pin.

[0011] More preferably, the top left side of the lower roller assembly is also provided with an elastic pad for the safety stop to abut against when wedged in.

[0012] More preferably, the elastic locking mechanism includes a bracket fixed to the left side of the upper roller assembly, an elastic locking tongue mounted on the bracket, and a compression spring connected between the elastic locking tongue and the bracket. Under the elastic force of the compression spring, the elastic locking tongue can extend to the right a certain distance and abut against the safety stop block in the open state.

[0013] More preferably, one end of the safety block protrudes outward and is provided with a limiting stop edge, which is used to abut against the left side of the lower roller assembly when the safety block is wedged between the upper roller assembly and the lower roller assembly, or to abut against the elastic locking tongue.

[0014] More preferably, the safety stop is further provided with a sensing stop, which is located directly above the lower sensor when the safety stop is wedged between the upper roller assembly and the lower roller assembly so that the lower sensor can sense the signal.

[0015] More preferably, the upper sensor is mounted on the left end of the upper roller assembly, and the lower sensor is mounted on the left end of the lower roller assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are reflected in:

[0017] 1. The safety stop automatically wedges between the upper and lower roller assemblies via a gravity-triggered mechanism, eliminating the need for operators to manually place the pad or activate the device. This design fundamentally solves the problem of missing safety barriers due to worker forgetfulness, negligence, or shortcuts in the prior art, ensuring that the fall protection function is always forcibly activated and eliminating the deficiency of relying on human awareness for safety.

[0018] 2. The use of a purely mechanical elastic locking mechanism to replace pneumatic pins or solenoid valve control avoids the problems of solenoid valve jamming and execution failure caused by circuit failure. At the same time, it relies solely on gravity and mechanical deformation to achieve block locking and manual unlocking. It can still work stably under harsh working conditions such as dust and humidity, so that the device completely avoids the hidden dangers of electrical / pneumatic failure and improves reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure in the embodiment;

[0020] Figure 2 This is a schematic diagram of the safety stop wedge between the upper and lower roller assemblies to form a self-locking mechanism in the embodiment;

[0021] Figure 3 This is a schematic diagram of the unlocking process in the embodiment;

[0022] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0023] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B.

[0024] In the picture:

[0025] 1. Safety stop; 2. Upper roller assembly; 3. Lower roller assembly; 4. Upper sensor; 5. Lower sensor; 6. Pin; 7. Elastic pad; 8. Bracket; 9. Elastic locking tongue; 1a. Limiting stop; 1b. Sensing stop. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0027] It should be noted in advance that, in this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them.

[0028] like Figures 1 to 3 As shown, the scapegoat device for preventing the roller mechanism from falling includes:

[0029] Safety block 1 is configured to automatically rotate to a vertical position under its own weight and wedge into the space between the upper roller assembly 2 and the lower roller assembly 3 (between their roller bearing seats) when the upper roller assembly 2 is raised to a preset position, forming a physical block. An elastic locking mechanism is configured to flip safety block 1 outwards when the upper roller assembly 2 is raised to a preset position, thereby preventing it from resetting under its own weight and thus placing safety block 1 in an open state. A sensing and monitoring mechanism includes an upper sensor 4 and a lower sensor 5. The lower sensor 5 monitors whether safety block 1 is wedged in place, and the upper sensor 4 monitors whether safety block 1 is in an open state. When the lower sensor 5 detects that safety block 1 is wedged in place, the system cannot initiate the upper roller's descent and closing action at this time. When the upper sensor 4 detects that safety block 1 is open, the system only allows the closing action after confirming manual unlocking.

[0030] In the above structure, the safety stop 1 is rotatably connected to the bottom left side of the upper roller assembly 2 via a pin 6.

[0031] Furthermore, the top left side of the lower roller assembly 3 is also provided with an elastic pad 7 for the safety stop 1 to abut against during wedging. In this way, when the safety stop 1 is rapidly wedged between the upper and lower roller assemblies under the action of gravity, it can provide a rigid support surface for buffering and absorbing energy. It can absorb the impact kinetic energy through its own elastic deformation, avoid the deformation or positioning displacement of the components caused by hard collision between the safety stop 1 and the lower roller assembly 3, reduce the noise of operation, and ensure that the wedging position of the safety stop 1 is accurately aligned with the monitoring area of ​​the lower sensor 5, thus ensuring the stability and reliability of the sensor signal detection.

[0032] In this embodiment, the elastic locking mechanism includes a bracket 8 fixed on the left side of the upper roller assembly 2, an elastic locking tongue 9 mounted on the bracket 8, and a compression spring connected between the elastic locking tongue 9 and the bracket 8. Under the elastic force of the compression spring, the elastic locking tongue 9 can extend to the right a certain distance and abut against the safety block 1 in the open state. One side of the elastic locking tongue 9 is a wedge-shaped guide surface, similar to a common door lock tongue, so that the safety block 1 can be pushed when it moves downward. More specifically, a slide groove can be provided on the bracket 8 so that the elastic locking tongue 9 slides and engages with the slide groove. A compression spring is provided between the inner wall of one end of the slide groove and the elastic locking tongue 9 to push the elastic locking tongue 9 outward. At the same time, a limit structure is provided at the other end of the slide groove to prevent the elastic locking tongue 9 from completely sliding out of the bracket 8. As long as a part of it is exposed, it can block the safety block 1 and prevent the safety block 1 from flipping down under its own weight. When the closing action is initiated, the upper roller assembly 2 will move the safety block 1 downward when it closes downward, thereby pushing the elastic locking tongue 9 back and allowing the safety block 1 to disengage from the elastic locking tongue 9 and continue to move downward.

[0033] Furthermore, one end of the safety stop 1 protrudes outward and is provided with a limiting stop 1a. The limiting stop 1a is used to abut against the left side of the lower roller assembly 3 when the safety stop 1 is wedged between the upper roller assembly 2 and the lower roller assembly 3, or to abut against the elastic locking tongue 9. In this way, when the safety stop 1 is wedged into the working position, radial positioning is achieved by abutting against the left side of the lower roller assembly 3, which can prevent the stop from lateral displacement due to vibration or impact, thus preventing the blocking failure. At the same time, after the safety stop 1 is pulled up and unlocked, axial constraint is formed by abutting against the elastic locking tongue 9, which can prevent the stop from slipping or swinging during gravity reset, ensuring the positional stability of the stop in a horizontal state, thereby improving the accuracy of the device's operation and its anti-interference ability.

[0034] The safety block 1 is also equipped with a sensing block 1b. When the safety block 1 is wedged between the upper roller assembly 2 and the lower roller assembly 3, the sensing block 1b is located directly above the lower sensor 5 so that the lower sensor 5 can sense the signal.

[0035] In addition, the upper sensor 4 is installed at the left end of the upper roller assembly 2, and the lower sensor 5 is installed at the left end of the lower roller assembly 3.

[0036] The scapegoat device for preventing the roller mechanism from falling, as described in the above embodiments, works roughly as follows when applied to the roller mechanism:

[0037] Phase 1: Automatic establishment of safety barrier (upper roller lifting process).

[0038] Before lifting Figure 1As shown, when the upper roller assembly 2 is raised to the preset height, the safety stop 1 automatically rotates downward around the pin under its own weight until it is vertically wedged between the upper roller assembly 2 and the lower roller assembly 3, forming a rigid physical barrier that fundamentally prevents accidental falls, forming a structure like... Figure 2 and Figure 4 The state shown is as follows. At the same time, the lower sensor 5 detects in real time that the safety stop 1 is wedged into place, and the system will prohibit the execution of the upper roller descent command.

[0039] Second stage: Safety release and reset (upper roller closing process).

[0040] When the roller assembly needs to be closed, the operator manually pulls the safety stop 1 to the unlocked position (at this time, the limit stop 1a abuts against the elastic locking tongue 9), triggering the upper sensor 4 to confirm that the stop has been released from its blocking state, forming a state as shown in the image. Figure 3 and Figure 5 The system is only allowed to start the descent procedure after receiving a signal from the upper sensor 4. As the upper roller assembly 2 moves downward, its safety stop 1 slowly moves downward, gradually pushing open the elastic locking tongue 9 until it is freed from the constraint of the elastic locking tongue 9. Then, under the action of gravity, the safety stop 1 swings inward along the pin axis. However, since the gap between the upper roller assembly 2 and the lower roller assembly 3 has narrowed, the safety stop 1 can no longer wedge in. At this time, the inner side of the safety stop 1 will abut against the edge of the left top edge of the lower roller assembly 3 until the upper roller assembly 2 is completely closed downward. Finally, the safety stop 1 falls horizontally onto the elastic pad 7 (returning to the state shown). Figure 1 (As shown in the diagram), one safety cycle is completed. The entire process requires no electronically controlled actuators, relying solely on gravity and mechanical interaction for passive protection.

[0041] This invention utilizes a gravity-triggered safety stop 1 to automatically wed into the rollers, forming a rigid barrier and completely eliminating the risk of manual intervention. A purely mechanical locking mechanism enables self-locking and manual unlocking of the stop, avoiding potential malfunctions of electrical / pneumatic components. Combined with dual-sensor status monitoring and system interlocking logic, it enforces a closed-loop operation of "no lowering if not in position, no closing if not unlocked." Ultimately, with a completely passive, unpowered mechanical structure at its core, it constructs a highly reliable fall-prevention safety guarantee in roller mechanisms with zero human dependence and zero risk of circuit failure. Furthermore, this device can be used not only on roller mechanisms but also on any equipment that requires opening and closing while simultaneously needing anti-pinch functionality.

[0042] To facilitate understanding by those skilled in the art of the improvements of this utility model compared to the prior art, some of the accompanying drawings and descriptions of this utility model have been simplified. The above embodiments are preferred implementations of this utility model. In addition, this utility model can be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A scapegoat device for preventing the fall of a roller mechanism, characterized in that, include: The safety stop (1) is configured to automatically rotate to a vertical position by its own gravity and wedge between the upper roller assembly (2) and the lower roller assembly (3) to form a physical block when the upper roller assembly (2) is raised to a preset position; The elastic locking mechanism is configured such that when the upper roller assembly (2) is raised to a preset position, the safety block (1) is flipped outward and can be pressed against the safety block (1) to prevent it from resetting by its own gravity, thereby putting the safety block (1) in the open state. The sensing and monitoring mechanism includes an upper sensor (4) and a lower sensor (5). The lower sensor (5) is used to monitor whether the safety stop (1) is wedged into place, and the upper sensor (4) is used to monitor whether the safety stop (1) is in the open state.

2. The scapegoat device for preventing the roller mechanism from falling according to claim 1, characterized in that: The safety stop (1) is rotatably connected to the bottom left side of the upper roller assembly (2) via a pin (6).

3. The scapegoat device for preventing the roller mechanism from falling according to claim 2, characterized in that: The top left side of the lower roller assembly (3) is also provided with an elastic pad (7) for the safety stop (1) to abut against when it is wedged in.

4. The scapegoat device for preventing the roller mechanism from falling according to claim 3, characterized in that: The elastic locking mechanism includes a bracket (8) fixed on the left side of the upper roller assembly (2) and an elastic locking tongue (9) mounted on the bracket (8). A compression spring is connected between the elastic locking tongue (9) and the bracket (8). Under the elastic force of the compression spring, the elastic locking tongue (9) can extend to the right a certain distance and abut against the safety stop (1) which is in the open state.

5. The scapegoat device for preventing the roller mechanism from falling according to claim 4, characterized in that: One end of the safety block (1) is provided with a limiting stop edge (1a) protruding outward. The limiting stop edge (1a) is used to abut against the left side of the lower roller assembly (3) when the safety block (1) is wedged between the upper roller assembly (2) and the lower roller assembly (3), or to abut against the elastic locking tongue (9).

6. The scapegoat device for preventing the roller mechanism from falling according to claim 5, characterized in that: The safety stop (1) is also provided with a sensing stop (1b). When the safety stop (1) is wedged between the upper roller assembly (2) and the lower roller assembly (3), the sensing stop (1b) is located directly above the lower sensor (5) so that the lower sensor (5) can sense the signal.

7. The scapegoat device for preventing the fall of a roller mechanism according to any one of claims 1-6, characterized in that: The upper sensor (4) is installed on the left end of the upper roller assembly (2), and the lower sensor (5) is installed on the left end of the lower roller assembly (3).

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