A control cable polyester tape automatic wrapping device and control method

Abstract

The application belongs to the technical field of cable manufacturing equipment, and particularly relates to a control cable polyester tape automatic wrapping device, which comprises an equipment box body, a disc and a tape unwinding disc arranged on the equipment box body. The disc and the tape unwinding disc have the freedom of rotating around the disc axis by means of a driving mechanism. A rack is arranged on the disc. A guide roller and two friction blocks arranged in a symmetrical gap matching mode are arranged on the rack. The guide roller has the freedom of moving along the length direction of the rack by means of a first telescopic mechanism. The two friction blocks have the freedom of moving along the width direction of the rack by means of a second telescopic mechanism. The application also relates to a control method of the control cable polyester tape automatic wrapping device. The rack is arranged to rotate synchronously with the disc. The guide roller, the friction block, the ratchet and the pawl are integrated on the rack. The tape breakage detection and the clamping and fixing action are performed synchronously with the wrapping rotating head. The tape breakage response is realized by taking the tape tension as a trigger signal.

Description

Technical Field

[0001] This invention belongs to the field of cable manufacturing equipment, and specifically relates to an automatic polyester tape wrapping device and control method for control cables. Background Technology

[0002] In the control cable manufacturing process, after multiple insulated core wires are stranded by a cabling machine, one or more layers of polyester tape need to be wrapped around the outside of the cable core to fix the shape of the cable core, prevent the core wires from loosening, and provide a regular circular outer surface for the subsequent extrusion sheath. Therefore, the wrapping process has become a necessary step in the control cable production line.

[0003] Existing cable wrapping machines typically use a reel that rotates at high speed with the rotating head to spirally wind polyester tape onto the traveling cable core. During high-speed wrapping, the polyester tape runs out of material on the reel, and the tape end quickly retracts and scatters under the rebound torque of the reel. Operators need to find the end again and thread the tape along the entire path, resulting in long recovery time and reduced production efficiency. Existing reel depletion protection relies on photoelectric sensors or tension sensors to detect and then shut down the machine electrically. However, these sensors are prone to false detection or missed detection in the dusty and vibrating environment of cable workshops, and the tape end remains free after shutdown, failing to solve the problem of tape end retraction and scattering. Some equipment uses mechanical stops to limit tape end retraction, but the stops can only prevent significant rebound and cannot reliably fix the tape end. The tape end may still shake and tangle near the stops, increasing the difficulty of re-threading the tape. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides an automatic wrapping device for control cable polyester tape, which can use the tension of the tape itself as a trigger signal to realize tape breakage response, and automatically clamp and fix the tape end after tape breakage to prevent the tape end from shrinking and falling off, thus shortening the recovery time for re-threading.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] An automatic polyester tape wrapping device for control cables includes an equipment housing, a disc and a tape feeding reel mounted on the equipment housing. The disc and tape feeding reel have the freedom to rotate around the axis of the disc via a driving mechanism. A frame is mounted on the disc. The frame is equipped with a guide roller and two friction blocks arranged symmetrically with a gap fit. The guide roller has the freedom to move along the length of the frame via a first telescopic mechanism. The two friction blocks have the freedom to move along the width of the frame via a second telescopic mechanism. Both ends of the guide roller are equipped with ratchet wheels. The frame is equipped with pawls that mesh with the ratchet wheels.

[0007] Furthermore, the first telescopic mechanism includes a first spring telescopic rod and a bearing seat, and the roller shaft of the guide roller is connected to the extended end of the first spring telescopic rod via the bearing seat.

[0008] Furthermore, the second telescopic mechanism includes a second spring telescopic rod, the extended end of which is connected to the friction block.

[0009] Furthermore, the pawl is horizontally mounted on the frame along the direction of movement of the guide roller, and the ratchet engages with the pawl when it moves to the position of the guide roller, thereby restricting the rotation of the guide roller.

[0010] Furthermore, the end of the friction block opposite to the guide roller is arc-shaped, and the gap between the two friction blocks is smaller than the diameter of the guide roller.

[0011] Furthermore, the drive mechanism includes a motor and a belt, wherein the motor drives a disc and a tape unwinding reel to rotate around the disc axis via the belt.

[0012] The present invention also includes a control method for an automatic polyester tape wrapping device for control cables, the control method comprising the following steps:

[0013] S1. The polyester tape is released from the tape release reel, passes over the guide roller, and is conveyed to the surface of the cable core for wrapping. At this time, the polyester tape is in a taut state, and the tape surface tension makes the guide roller overcome the elastic force of the first spring telescopic rod and keep it in the initial position.

[0014] S2. When the polyester belt breaks or the polyester belt on the unloading reel is used up, the belt tension disappears, the first spring telescopic rod releases its elastic force, and pushes the guide roller to move along the length of the frame towards the two friction blocks.

[0015] S3. When the guide roller moves between the two friction blocks, the roller surface of the guide roller overcomes the elastic force of the second spring telescopic rod and pushes the two friction blocks apart to both sides, and the guide roller passes between the two friction blocks.

[0016] S4. After the guide roller passes through the two friction blocks, the ratchet at both ends of the guide roller engages with the pawl on the frame, and the guide roller is restricted from rotating around its own axis. The roller surface of the guide roller abuts against the end faces of the two friction blocks, and the polyester belt forms an Ω shape between the guide roller and the two friction blocks. The broken end of the belt is fixed by the limiting effect formed by the cooperation of the pawl and ratchet and the clamping friction of the two friction blocks.

[0017] S5, the guide roller and friction block clamp the broken end of the polyester belt. After replacing the polyester belt on the unloading reel, the broken end of the previous polyester belt is sewn to the beginning of the new polyester belt. Then the unloading reel is reversed. With the help of the unloading reel's own braking damping action and the already stopped cable core pulling the polyester belt, the polyester belt regains tension and the first spring telescopic rod is compressed to disengage from the two friction blocks, releasing the polyester belt from its entangled and locked state, making it easier to restart the machine.

[0018] Furthermore, in step S5, after the equipment is started, the polyester belt is kept under tension by the damping force of the unwinding reel, thereby keeping the first spring telescopic rod on the other side of the two friction blocks to avoid accidental locking and allow the equipment to resume operation.

[0019] The beneficial effects of this invention are:

[0020] This invention sets up a frame that rotates synchronously with the disc, and integrates guide rollers, friction blocks, ratchet wheels and pawls on the frame, so that the tape breakage detection and clamping and fixing actions are performed synchronously with the wrapping rotating head, and the tape tension itself is used as the trigger signal to realize the tape breakage response.

[0021] Through the cooperation of the guide roller, the first spring telescopic rod, two friction blocks, the second spring telescopic rod, the ratchet and the pawl, after the reel is exhausted, the first spring telescopic rod pushes the guide roller to open the friction blocks and pass through. The ratchet and the pawl engage to limit the guide roller. The guide roller and the friction blocks abut against each other to make the polyester belt form an Ω-shaped bend. With the dual action of limiting and friction clamping, the broken belt end is fixed, preventing the belt end from shrinking and falling back, and shortening the recovery time for re-threading. Attached Figure Description

[0022] Figure 1 A front view of the overall structure provided for this invention;

[0023] Figure 2 This is a front view of the rack provided by the present invention;

[0024] Figure 3 This is a front view of the guide roller provided by the present invention;

[0025] Figure 4 This is a top view of the guide roller provided by the present invention.

[0026] In the attached diagram, 1 is the equipment housing; 11 is the motor; 12 is the belt; 2 is the disc; 3 is the tape feeding reel; 4 is the frame; 5 is the guide roller; 51 is the first spring telescopic rod; 52 is the shaft seat; 6 is the friction block; 61 is the second spring telescopic rod; 7 is the ratchet; and 8 is the pawl. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0028] The present invention is as follows Figures 1-4As shown, an automatic polyester tape wrapping device for control cables is disclosed, including an equipment housing 1. A disc 2 and a tape feeding reel 3 are provided on the equipment housing 1. The disc 2 and the tape feeding reel 3 have the freedom to rotate around the axis of the disc 2 by means of a driving mechanism. A frame 4 is provided on the disc 2. A guide roller 5 and two friction blocks 6 arranged symmetrically with a gap are provided on the frame 4. The guide roller 5 has the freedom to move along the length direction of the frame 4 by means of a first telescopic mechanism. The two friction blocks 6 have the freedom to move along the width direction of the frame 4 by means of a second telescopic mechanism. Both ends of the guide roller 5 are provided with ratchet 7. A pawl 8 that meshes with the ratchet 7 is provided on the frame 4.

[0029] The first telescopic mechanism includes a first spring telescopic rod 51 and a bearing seat 52. The roller shaft of the guide roller 5 is connected to the extended end of the first spring telescopic rod 51 via the bearing seat 52.

[0030] The second telescopic mechanism includes a second spring telescopic rod 61, the extended end of which is connected to the friction block 6.

[0031] By setting a frame 4 that rotates synchronously with the disc 2 on the disc 2, and integrating guide roller 5, friction block 6, ratchet 7 and pawl 8 on the frame 4, the tape breakage detection and clamping and fixing actions are performed synchronously with the wrapping rotating head, without affecting the continuity of the wrapping operation. The guide roller 5 maintains its initial position by overcoming the elastic force of the first spring telescopic rod 51 under the action of tape surface tension. After the tape breaks, the first spring telescopic rod 51 is released and pushes the guide roller 5 to move, realizing the tape breakage response triggered by the tension of the tape itself. When the guide roller 5 moves, it opens the two friction blocks 6 and passes through them. After passing through, the ratchet 7 and pawl 8 engage to limit the guide roller 5. At the same time, the guide roller 5 and the friction block 6 abut against each other, causing the polyester tape to form an Ω-shaped bend. With the dual action of limiting and friction clamping, the broken tape end is fixed, solving the technical problems of tape end shrinkage and scattering after tape breakage and difficulty in re-threading.

[0032] By setting a limit switch on one side of the pawl 8 that cooperates with the guide roller 5, when the guide roller 5 reaches the back side of the friction block 6, the limit switch is triggered, causing the automatic polyester belt wrapping device to stop operating. This avoids situations where long-distance conveying leads to increased time for subsequent splicing due to the end being far away from the belt, and the inconvenience caused by the need for long-distance reversing.

[0033] Furthermore, the pawl 8 is horizontally mounted on the frame 4 along the moving direction of the guide roller 5. When the ratchet 7 moves with the guide roller 5 to the position of the pawl 8, it engages with the pawl 8 to restrict the rotation of the guide roller 5.

[0034] By setting the pawl 8 horizontally along the moving direction of the guide roller 5, the ratchet 7 automatically engages with the pawl 8 after it moves into position with the guide roller 5. After the ratchet 7 engages with the pawl 8, the guide roller 5 cannot rotate around its own axis, so that the polyester belt that passes around the guide roller 5 cannot slide on the roller surface, thus providing a basis for preventing rotation of the Ω-shaped clamp.

[0035] Furthermore, the end of the friction block 6 opposite to the guide roller 5 is arc-shaped, and the gap between the two friction blocks 6 is smaller than the diameter of the guide roller 5.

[0036] By setting the end of the friction block 6 to be arc-shaped, the contact resistance when the guide roller 5 opens the friction block 6 is reduced, so that the guide roller 5 can pass smoothly between the two friction blocks 6. The gap between the two friction blocks 6 is smaller than the diameter of the guide roller 5, ensuring that the guide roller 5 must overcome the elastic force of the second spring telescopic rod 61 to open the friction block 6 when passing through. After passing through, the friction block 6 is reset under the action of the second spring telescopic rod 61 and abuts against the roller surface of the guide roller 5 to form a clamping of the polyester belt.

[0037] Furthermore, the drive mechanism includes a motor 11 and a belt 12. The motor 11 drives the disc 2 and the tape feeding disc 3 to rotate around the axis of the disc 2 via the belt 12.

[0038] The disc 2 is driven to rotate by the motor 11 and the belt 12. The disc 2 drives the tape feeding reel 3 and the frame 4 to rotate synchronously. During the revolution, the tape feeding reel 3 releases the polyester tape and spirally winds it onto the moving cable core. The structure is simple and the transmission is stable.

[0039] The present invention also includes a control method for an automatic polyester tape wrapping device for control cables, the method comprising the following steps:

[0040] S1. The polyester tape is released from the tape release reel 3, passes over the guide roller 5, and is conveyed to the surface of the cable core for wrapping. At this time, the polyester tape is in a taut state, and the tape surface tension makes the guide roller 5 overcome the elastic force of the first spring telescopic rod 51 and keep it in the initial position.

[0041] S2. When the polyester belt breaks or the polyester belt on the unloading reel 3 is used up, the belt tension disappears, the first spring telescopic rod 51 releases its elastic force, and pushes the guide roller 5 to move along the length of the frame 4 towards the two friction blocks 6.

[0042] S3. When the guide roller 5 moves between the two friction blocks 6, the roller surface of the guide roller 5 overcomes the elastic force of the second spring telescopic rod 61 and pushes the two friction blocks 6 apart to both sides, and the guide roller 5 passes between the two friction blocks 6.

[0043] S4. After the guide roller 5 passes through the two friction blocks 6, the ratchet 7 at both ends of the guide roller 5 engages with the pawl 8 on the frame 4, and the guide roller 5 is restricted from rotating around its own axis. The roller surface of the guide roller 5 abuts against the end faces of the two friction blocks 6, and the polyester belt forms an Ω shape between the guide roller 5 and the two friction blocks 6. The broken belt end is fixed by the limiting effect formed by the cooperation of the pawl 8 and the ratchet 7 and the clamping friction of the two friction blocks 6.

[0044] S5, guide roller 5, and friction block 6 form a clamping mechanism for the broken end of the polyester belt. After replacing the polyester belt on the unloading reel 3, the broken end of the previous polyester belt is sewn together with the beginning of the new polyester belt. Then, the unloading reel 3 is reversed. With the help of the braking damping effect of the unloading reel 3 and the already stopped cable core pulling the polyester belt, the polyester belt regains tension and compresses the first spring telescopic rod 51 until it is disengaged from the two friction blocks 6, releasing the polyester belt from its entangled and locked state, making it easier to restart the machine.

[0045] Furthermore, in step S5, after the equipment is started, the polyester belt is kept under tension by the damping force of the tape reel 3 itself, thereby keeping the first spring telescopic rod 51 always on the other side of the two friction blocks 6 to avoid accidental locking, and the equipment resumes operation.

[0046] Through the above control method, a purely mechanical automatic response is achieved after the tape reel is exhausted. During normal wrapping, the tape surface tension balances the spring force to maintain the initial state. After the tape reel is exhausted, the spring force is released to drive the guide roller 5 to move. Through the three actions of opening the friction block 6, the engagement of the ratchet 7 and the pawl 8, and the Ω-shaped clamping, the broken tape end is fixed. During reset, a new polyester tape is replaced on the tape release reel 3. The broken end of the previous polyester tape is sewn to the beginning of the new polyester tape. Then, the tape release reel 3 is reversed. With the help of the braking damping effect of the tape release reel 3 and the already stopped cable core pulling the polyester tape, the polyester tape regains tension and compresses the first spring telescopic rod 51 to disengage from the two friction blocks 6, releasing the winding and locking state of the polyester tape.

[0047] After the polyester tape is released from its winding and locking state, the two friction blocks 6 immediately return to their clearance fit state, eliminating the need for manual adjustment of the position of the friction blocks 6 and simplifying the reset operation.

[0048] In this embodiment, before starting the equipment, the polyester tape roll is installed on the unloading reel 3. The end of the polyester tape is pulled out from the unloading reel 3, passes over the guide roller 5, and is then conveyed to the surface of the cable core for fixing. The motor 11 is started, and the motor 11 drives the disc 2 to rotate around its own axis through the belt 12. The disc 2 drives the unloading reel 3, the frame 4, and the guide roller 5, friction block 6, ratchet 7, and pawl 8 installed on the frame 4 to rotate synchronously. During the revolution, the polyester tape spirally winds around the moving cable core. During normal wrapping, the polyester tape is in a taut state, and the surface tension of the tape acts on the guide roller 5, causing the guide roller 5 to overcome the first spring telescopic rod 51. The elastic force is maintained at the initial position near the cylinder side of the first spring telescopic rod 51; when the polyester tape breaks during the wrapping process or the polyester tape on the unwinding reel 3 is used up, the surface tension of the tape downstream of the guide roller 5 disappears, the first spring telescopic rod 51 releases its elastic force, pushing the shaft seat 52 and the guide roller 5 to move along the length of the frame 4 towards the two friction blocks 6; when the guide roller 5 moves between the two friction blocks 6, since the gap between the two friction blocks 6 is smaller than the diameter of the guide roller 5, the roller surface of the guide roller 5 contacts the arc end of the friction block 6 and overcomes the elastic force of the second spring telescopic rod 61 to push the two friction blocks 6 apart to both sides, guiding... The guide roller 5 passes between the two friction blocks 6; after passing through, the guide roller 5 continues to move until the ratchet 7 at both ends engages with the pawl 8 on the frame 4, restricting the guide roller 5 from rotating around its own axis; at this time, the guide roller 5 is located on one side of the two friction blocks 6, and the roller surface of the guide roller 5 abuts against the end faces of the two friction blocks 6. The end of the broken polyester belt forms an Ω-shaped bend between the guide roller 5 and the two friction blocks 6. With the limiting action of the ratchet 7 and pawl 8, and the clamping friction of the two friction blocks 6, the broken belt end is firmly fixed. The guide roller 5 achieves anti-rotation and limiting by the limiting cooperation of the ratchet 7 and pawl 8, so that the two... The friction block 6 cooperates with the guide roller 5 to wrap the polyester belt around the guide roller 5. With the help of the friction between the guide roller 5 and the polyester belt, an Ω-shaped winding and locking state is formed to prevent the belt end from shrinking and falling off. After replacing the polyester belt on the unloading reel 3, the broken end of the previous polyester belt is sewn to the beginning of the new polyester belt. Then the unloading reel 3 is reversed. With the help of the braking damping action of the unloading reel 3 and the already stopped cable core pulling the polyester belt, the polyester belt regains tension and compresses the first spring telescopic rod 51 to disengage from the two friction blocks 6, releasing the winding and locking state of the polyester belt, which is convenient for subsequent restart.

Claims

1. An automatic polyester tape wrapping device for control cables, comprising a housing (1), a disc (2) and a tape feeding reel (3) disposed on the housing (1), wherein the disc (2) and the tape feeding reel (3) have a degree of freedom to rotate about the axis of the disc (2) by means of a driving mechanism, characterized in that: The disc (2) is provided with a frame (4), and the frame (4) is provided with a guide roller (5) and two friction blocks (6) arranged in a symmetrical gap fit. The guide roller (5) has the freedom to move along the length direction of the frame (4) by means of a first telescopic mechanism. The two friction blocks (6) have the freedom to move along the width direction of the frame (4) by means of a second telescopic mechanism. Both ends of the guide roller (5) are provided with ratchet wheels (7), and the frame (4) is provided with pawls (8) that mesh with the ratchet wheels (7).

2. The automatic polyester tape wrapping device for control cables according to claim 1, characterized in that, The first telescopic mechanism includes a first spring telescopic rod (51) and a bearing seat (52). The roller shaft of the guide roller (5) is connected to the extended end of the first spring telescopic rod (51) via the bearing seat (52).

3. The automatic polyester tape wrapping device for control cables according to claim 1, characterized in that, The second telescopic mechanism includes a second spring telescopic rod (61), the extended end of which is connected to the friction block (6).

4. The automatic polyester tape wrapping device for control cables according to claim 1, characterized in that, The pawl (8) is horizontally arranged on the frame (4) along the moving direction of the guide roller (5). When the ratchet (7) moves with the guide roller (5) to the position of the pawl (8), it engages with the pawl (8) to restrict the rotation of the guide roller (5).

5. The automatic polyester tape wrapping device for control cables according to claim 1, characterized in that, The friction block (6) is arc-shaped at one end opposite to the guide roller (5), and the gap between the two friction blocks (6) is smaller than the diameter of the guide roller (5).

6. The automatic polyester tape wrapping device for control cables according to claim 1, characterized in that, The drive mechanism includes a motor (11) and a belt (12). The motor (11) drives the disc (2) and the tape feeding disc (3) to rotate around the axis of the disc (2) via the belt (12).

7. A control method for an automatic polyester tape wrapping device for control cables, based on the automatic polyester tape wrapping device for control cables as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. The polyester tape is released from the tape release reel (3), passes over the guide roller (5), and is then conveyed to the surface of the cable core for wrapping. At this time, the polyester tape is in a tensioned state, and the tape surface tension makes the guide roller (5) overcome the elastic force of the first spring telescopic rod (51) and remain in the initial position. S2. When the polyester belt breaks or the polyester belt on the unloading reel (3) is used up, the belt tension disappears, the first spring telescopic rod (51) releases its elastic force, and pushes the guide roller (5) to move along the length of the frame (4) towards the two friction blocks (6). S3. When the guide roller (5) moves between the two friction blocks (6), the roller surface of the guide roller (5) overcomes the elastic force of the second spring telescopic rod (61) and pushes the two friction blocks (6) apart to both sides, and the guide roller (5) passes between the two friction blocks (6). S4. After the guide roller (5) passes through the two friction blocks (6), the ratchet (7) at both ends of the guide roller (5) engages with the pawl (8) on the frame (4), and the guide roller (5) is restricted to rotate around its own axis. The roller surface of the guide roller (5) abuts against the end faces of the two friction blocks (6), and the polyester belt forms an Ω shape between the guide roller (5) and the two friction blocks (6). The broken belt end is fixed by the limiting effect formed by the cooperation of the pawl (8) and the ratchet (7) and the clamping friction of the two friction blocks (6). S5, guide roller (5) and friction block (6) form a clamp on the broken end of the polyester belt. After replacing the polyester belt on the tape release reel (3), the broken end of the previous polyester belt is sewn to the beginning of the new polyester belt. Then the tape release reel (3) is reversed. With the help of the braking damping effect of the tape release reel (3) and the already stopped cable core pulling the polyester belt, the polyester belt regains tension and the first spring telescopic rod (51) is compressed to disengage from the two friction blocks (6), releasing the entangled and locked state of the polyester belt, which is convenient for restarting the machine.

8. The control method for an automatic polyester tape wrapping device for control cables according to claim 7, characterized in that, In step S5, after the subsequent start-up, the polyester belt is kept under tension by the damping force of the tape reel (3), thereby keeping the first spring telescopic rod (51) always on the other side of the two friction blocks (6) to avoid accidental locking, and the equipment resumes operation.

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