A multi-core cable cabling safety protection device and a cabling machine

Abstract

The present application relates to the field of wire and cable production equipment, particularly relates to a multi-core cable cabling safety protection device and a cabling machine. One kind is provided in the present application, and the multi-core cable cabling safety protection device includes base (1), the trigger assembly (2) is slidably connected on the base (1), and the trigger assembly (2) is provided with travel switch (3) along the sliding path of the base (1). The present application has novel structure and strong practicability, the open type protection boundary is formed by setting the vertical rod, so that the body parts (including hands) of the operator can reliably trigger the device by touching the vertical rod when accidentally approaching the dangerous area from any direction, and the blind area of protection is eliminated. At the same time, the present application has simple structure, low manufacturing cost, low installation precision requirement, easy to add and transform on existing equipment, and has great market promotion value.

Description

Technical Field

[0001] This invention relates to the field of wire and cable production equipment, and in particular to a safety protection device and cable-forming machine for multi-core cable forming. Background Technology

[0002] In the cabling process of electric wires and cables, when operators strand multi-core cables, they need to twist multiple insulated cores and filler material together at a certain pitch. When a roll of filler material is used up or a strand breaks and needs to be replaced, the operator needs to manually add new filler material to the front of the stranding and bundling die while the cabling machine is running continuously. The filler material is carried into the bundling die as the equipment runs. Existing equipment has obvious safety defects in this operation. The main protection method at present is to physically isolate the equipment by adding safety fences around it, but this causes great inconvenience to personnel who need to frequently approach the equipment to operate it. Another existing technology is to install safety light curtains around the bundling die, which trigger a shutdown when a person enters the danger zone. However, because operators need to frequently add filler material, the safety light curtains are repeatedly triggered, causing frequent equipment shutdowns, which seriously disrupts normal production continuity. As a result, many operators have to bypass or turn off the safety light curtains in actual production, making the safety protection ineffective.

[0003] It is noteworthy that, looking at existing technologies, there is a common design inertia among those skilled in the art: that for the entrance of a rotating parallel die, the protective device should be placed as "close" to the hazard source as possible, employing an enclosed or sleeve-type structure to prevent hands from entering the gap. While this approach achieves protection to some extent, it also directly leads to a series of problems, such as complex structures, blind spots, and interference with operation. Therefore, hand-pinching accidents occur frequently in this operational stage, and significant safety hazards remain.

[0004] Therefore, those skilled in the art are dedicated to developing a multi-core cable cabling safety protection device and cabling machine with a simpler structure, a more clearly defined triggering area, higher reliability, and without interfering with normal production operations. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a safety protection device for multi-core cable forming and a cable forming machine.

[0006] To achieve the above objectives, the present invention provides a safety protection device for multi-core cable cabling, including a base, a triggering component slidably connected on the base, and a limit switch provided on the triggering component along the sliding path of the base.

[0007] Preferably, a support plate is provided on each of the opposite sides of the base, and a guide rail is provided between the two support plates, the guide rail extending along the cable travel direction.

[0008] Preferably, the guide rails are configured as two rails, which are arranged in parallel and spaced apart.

[0009] Preferably, the triggering component includes a slider that slides in conjunction with the guide rail.

[0010] Preferably, the guide rail sleeve is provided with an elastic reset member, one end of which is connected to the support plate and the other end is connected to the slider; in the free extension state, the slider is located away from the limit switch.

[0011] Preferably, the slider is provided with a vertical rod that extends in a vertical direction.

[0012] Preferably, the uprights are provided in pairs, with the two uprights arranged parallel to each other and spaced apart.

[0013] The present invention also provides a multi-core cable forming machine, including the multi-core cable forming safety protection device as described above.

[0014] Preferably, it also includes a paralleling mold, wherein the base is mounted on the inlet side of the paralleling mold.

[0015] Preferably, it also includes a safety relay, wherein the contact signal of the limit switch is connected to the input terminal of the safety relay, and the output contact of the safety relay controls the on / off state of the emergency stop safety circuit.

[0016] The beneficial effects of this invention are: The invention has a novel structure and strong practicality. By setting up uprights to form an open protective boundary, it ensures that when an operator accidentally approaches the danger zone from any direction, all parts of their body (including their hands) can reliably trigger the device by touching the uprights, eliminating blind spots in protection. At the same time, this application has a simple structure, low manufacturing cost, low installation accuracy requirements, and is easy to retrofit and modify into existing equipment, thus possessing significant market potential. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the base structure in a specific embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the triggering component in a specific embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of a multi-core cable cabling safety protection device according to a specific embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of a multi-core cable forming machine according to a specific embodiment of the present invention.

[0021] 1. Base; 1a. Guide groove; 2. Trigger assembly; 21. Slider; 21a. Through hole; 21b. Guide protrusion; 22. Upright rod; 3. Limit switch; 4. Support plate; 5. Guide rail; 6. Elastic reset component; 7. Parallel mold. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1 As shown, this invention provides a multi-core cable cabling safety protection device, including a base 1. The base 1, serving as the mounting foundation, is made of high-strength steel or engineering plastic, and a trigger component 2 is slidably connected to it. Specifically, two support plates 4 are arranged opposite each other on both sides of the base 1 along its length, and a guide rail 5 is arranged between the two support plates 4. The two ends of the guide rail 5 are respectively connected to the two support plates 4, and its extension direction is parallel to the travel direction of the cable (not shown in the figure). In this embodiment, two guide rails 5 are provided, parallel and spaced apart. This spaced arrangement of the two guide rails 5 provides more stable double-sided support for the subsequent sliding components, ensuring the smoothness of the sliding process and preventing jamming; on the other hand, the gap between the two guide rails 5 does not obstruct the normal feeding of the cable core and filling material.

[0024] like Figure 2-3 As shown, the trigger component 2 is slidably connected to the base 1 via the guide rail 5. Specifically, the trigger component 2 includes a slider 21, which slides in engagement with the guide rail 5. In this embodiment, the slider 21 is provided with through holes 21a corresponding to the guide rail 5, and the slider 21 slides on the guide rail 5 through these through holes 21a. A guide protrusion 21b is provided below the slider 21, and a guide groove 1a that mates with the guide protrusion 21b is provided on the base 1. The design of the guide groove 1a and the guide protrusion 21b provides additional lateral restraint when the slider 21 slides along the guide rail 5, effectively preventing the slider 21 from radially flipping or shifting during movement, further enhancing the guiding accuracy and reliability of the entire triggering action.

[0025] Furthermore, the slider 21 is equipped with a vertical rod 22 extending vertically upwards. In this embodiment, the vertical rod 22 is a stainless steel round tube or a high-strength round steel, with a height of 25cm. There are two vertical rods 22, which are arranged parallel and spaced apart. The distance between their installation positions and the entrance of the paralleling mold 7 (mentioned later) is 25cm. The two spaced vertical rods 22 form an open protective boundary on both sides in front of the entrance of the paralleling mold 7, allowing the operator's hands to effectively contact and push the vertical rod 22 through active or passive collision with other parts of the body when approaching the danger zone from the front, side, or diagonal, thereby triggering the protective action and achieving protection without blind spots.

[0026] In addition, an elastic reset member 6 is fitted around the guide rail 5. One end of the elastic reset member 6 is connected to the support plate 4, and the other end is connected to the slider 21. When the elastic reset member 6 is in its freely extended state, the slider 21 is located away from the limit switch 3. In this embodiment, the elastic reset member 6 is specifically a compression spring with a spring force coefficient of 0.8 N / mm. Experimental verification shows that this parameter can ensure that when the filling material is added normally, slight touches by the operator's hand will not push the slider 21 to trigger the limit switch 3, and can also respond sensitively to the force applied to the hand when the hand is accidentally caught.

[0027] In addition, a limit switch 3 is also provided on the sliding path of the trigger component 2 along the base 1. In this embodiment, the limit switch 3 is preferably a high-reliability safety switch with a forced disconnect function, and its trigger stroke is set to 15mm. The internal contacts can be redundantly designed to improve safety. The contacts of the limit switch 3 are finally connected in series to the emergency stop circuit of the main control circuit of the cable-laying machine. When the slider 21 is forced to slide backward and exceeds the preset trigger stroke, the limit switch 3 is triggered, thereby cutting off the power source of the equipment and realizing an emergency stop.

[0028] like Figure 4 As shown, the present invention also provides a multi-core cable forming machine, including the multi-core cable forming safety protection device and the paralleling mold 7 as described above, wherein the base 1 is installed on the inlet side of the paralleling mold 7. In addition, it includes a safety relay, the contact signal of the limit switch 3 is connected to the input terminal of the safety relay, and the output contact of the safety relay controls the on / off state of the emergency stop safety circuit.

[0029] During normal operation of the cabling machine, the upright 22 remains in its initial position away from the coiling die 7 under the action of the elastic reset member 6. When the operator needs to add filler material, their hand feeds the filler material into the inlet of the coiling die 7 from the side or at an angle. Since the path of the normal operation is offset from the position of the upright 22, or only a slight touch occurs, it is insufficient to overcome the elastic force of the compression elastic reset member 6 to push the slider 21 backward. Therefore, the limit switch 3 is not triggered, the equipment continues to run, and the production efficiency is not affected.

[0030] In actual production, the most dangerous accidents typically occur in the following scenario: when an operator adds filler material, their hand is accidentally caught in the stranding wire cores in front of the winding die 7. At this point, the hand has not yet entered the entrance of the winding die 7, but it is already entangled and trapped by the stranding wire cores. The operator's instinctive reaction is to immediately pull their hand back; however, because the hand is already trapped by the wire cores, it cannot be pulled out smoothly. Instead, due to the continuous operation of the equipment, the body is gradually dragged towards the winding die 7. During this process, the operator's elbows, arms, and even torso will first touch the uprights 22 located on both sides in front of the winding die 7.

[0031] When the upright 22 is pushed by an elbow, arm, or body, it slides backward along the guide rail 5 via the slider 21. When the slider 21 slides further than the trigger stroke of the limit switch 3, the limit switch 3 is triggered, its contacts open, directly cutting off the emergency stop circuit of the cable-forming machine's main control circuit, and the equipment's power source is instantly cut off. Testing shows that the response time from when the upright 22 is touched to when the equipment motor stops is less than 200ms. At this time, the operator's hand has not yet been caught in the entry of the cable-forming die 7, thus effectively preventing further injury and minimizing accident damage.

[0032] The key advantage of this design is that the trigger point is not limited to the operator's hands. Instead, it is an open protective boundary formed by the two uprights 22 on both sides in front of the inlet of the parallel die 7. This allows the operator to trigger a stop in case of an accident, regardless of whether their hands are entangled or not, as long as any part of their body (elbow, arm, torso, etc.) touches the uprights 22 during passive forward movement. This significantly improves the reliability of triggering in unexpected situations. Moreover, after each trigger, the operator only needs to remove their hands, and the elastic reset component 6 automatically pushes the slider 21 and uprights 22 back to their initial positions. The equipment can be restarted and production resumed without manual reset.

[0033] To further verify the key parameter settings of this device, the inventors conducted multiple sets of comparative experiments. The experimental results show that:

[0034] When the distance between the upright pole 22 and the entrance of the parallel module 7 is less than 15cm, the hand is very likely to touch the upright pole 22 during normal operation, leading to accidental triggering. The length from an adult's hand to their elbow is approximately 40-50cm. When the distance is greater than 35cm, the protected area is too large, and the elbow, arm, torso, and other body parts are already close to the danger zone before the hand touches the upright pole 22, reducing the protective effect. When the distance is 20-30cm, the protective effect and ease of operation are optimally balanced.

[0035] When the elastic coefficient of the elastic reset element 6 is less than 0.5 N / mm, even a slight touch during normal operation may trigger a shutdown; when the elastic coefficient is greater than 1.0 N / mm, the resistance to pushing the upright 22 is too great when a danger occurs, and the response time is prolonged. When the elastic coefficient is between 0.5 and 1.0 N / mm, it can effectively distinguish between normal operation and dangerous conditions while ensuring a sensitive response.

[0036] When the trigger stroke of limit switch 3 is less than 5mm, vibration or slight contact during normal operation can easily lead to false triggering. When the trigger stroke is greater than 25mm, slider 21 needs to slide a longer distance to trigger, which prolongs the response time. When the trigger stroke is 10-20mm, the false triggering rate is the lowest and the response time meets safety requirements.

[0037] This application features a novel and highly practical structure. By setting up uprights 22 to form an open protective boundary, it ensures that when an operator's hand accidentally approaches the danger zone from any direction, all parts of their body (including the hand) can reliably trigger the device by touching the uprights, eliminating blind spots. Furthermore, this application has a simple structure, low manufacturing cost, low installation precision requirements, and is easy to retrofit into existing equipment, making it highly valuable for market promotion.

[0038] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A safety protection device for multi-core cable cabling, characterized in that: Includes a base (1), on which a trigger component (2) is slidably connected, and a limit switch (3) is provided on the trigger component (2) along the sliding path of the base (1).

2. The multi-core cable cabling safety protection device as described in claim 1, characterized in that: The base (1) is provided with support plates (4) on both sides, and a guide rail (5) is provided between the two support plates (4), the guide rail (5) extending along the direction of cable travel.

3. The multi-core cable cabling safety protection device as described in claim 2, characterized in that: The guide rail (5) is set as two rails, which are arranged in parallel and spaced apart.

4. The multi-core cable cabling safety protection device as described in claim 2, characterized in that: The trigger component (2) includes a slider (21) which slides in conjunction with the guide rail (5).

5. The multi-core cable cabling safety protection device as described in claim 4, characterized in that: The guide rail (5) is fitted with an elastic reset member (6). One end of the elastic reset member (6) is connected to the support plate (4), and the other end is connected to the slider (21). When the elastic reset member (6) is in a free extension state, the slider (21) is located away from the limit switch (3).

6. The multi-core cable cabling safety protection device as described in claim 4, characterized in that: The slider (21) is provided with a vertical rod (22), which extends in a vertical direction.

7. The multi-core cable cabling safety protection device as described in claim 6, characterized in that: The uprights (22) are set in two, and the two uprights (22) are set in parallel and spaced apart.

8. A multi-core cable forming machine, characterized in that: Includes the multi-core cable cabling safety protection device as described in any one of claims 1-7.

9. The multi-core cable forming machine as described in claim 8, characterized in that: It also includes a paralleling mold (7), the base (1) being installed on the inlet side of the paralleling mold (7).

10. The multi-core cable forming machine as described in claim 8, characterized in that: It also includes a safety relay, the contact signal of the limit switch (3) is connected to the input terminal of the safety relay, and the output contact of the safety relay controls the opening and closing of the emergency stop safety circuit.

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