Steel cord double-drum active take-up and pay-off unit

Abstract

The utility model discloses a kind of steel cord double drum active take-up and pay-off unit, it is related to wire rod processing technical field.The utility model includes rack, two drum devices, two wire arranging devices, two material cylinder assembly devices and two driving devices, rack includes chassis, two material cylinder installation sites are equipped in chassis, the position of chassis away from material cylinder installation site is chamber, vertical frame body is fixed in the top rear side area of chassis, mesa is formed between the top front side area of chassis and the front side of vertical frame body, and wire arranging device is mechanical reversing type wire arranging mechanism.The utility model is switched by the cooperative design of drum device and positioning mechanism, by controlling the connection and separation of transverse cylinder driving locking rod and sleeve body fastening screw rod, the locking of sleeve body and the release of two kinds of state of free can be realized, the quick, automatic switching of take-up and pay-off mode is realized, and production efficiency is revolutionarily improved.

Description

Technical Field

[0001] This utility model belongs to the field of wire processing technology, and in particular relates to a double-drum active winding and unwinding machine for steel cord. Background Technology

[0002] In the production of rubber products, especially radial tires, steel cord serves as a key skeleton material, and its quality directly affects the strength, durability, and safety of the product. The production process of steel cord includes multiple steps such as drawing, twisting, and electroplating. Between each step, semi-finished or finished cords need to be frequently released from the take-up reel (drum) of the previous equipment and then wound onto the empty reel of the next equipment. Therefore, the take-up and unwinding unit is a key piece of equipment that connects the upstream and downstream processes in cord production.

[0003] Currently, the traditional take-up and pay-off equipment and methods widely used in the industry have the following significant drawbacks: 1. Limited Functionality and Low Conversion Efficiency: Most equipment has a single function, with the take-up machine and the pay-off machine operating independently. When the production process needs to be converted from take-up to pay-off (for example, transferring a full roll of wire from the twisting machine to the wet drawing machine as a pay-off source), heavy physical handling is required: operators need to use a crane to unload the full roll of wire, then load an empty roll or a roll to be paid off, and re-thread the wire. This process is not only labor-intensive and time-consuming, but also seriously disrupts the continuity and automation of the production line, becoming a bottleneck that restricts the improvement of overall efficiency.

[0004] 2. Challenges in intermediate guiding and tension control: Some equipment attempts to introduce an intermediate drum as a guiding and tension buffer device. However, it faces significant challenges during mode switching. During take-up, the intermediate drum needs to provide stable friction to establish tension, while during unwinding, the wire needs to be able to smoothly unwind from the intermediate drum to avoid scratches. Traditional designs cannot effectively resolve this contradiction. If a fixed guide wheel is used, the wire and the edge of the drum will experience severe sliding friction during unwinding, damaging the coating on the surface of the cord. If the guide wheel is simply allowed to move, it is impossible to establish stable tension during take-up.

[0005] 3. High risk of surface quality damage to wire: Steel cord, especially brass-plated cord, has extremely high requirements for surface quality. During the wire laying process, any unreasonable sliding friction, scratching or squeezing may cause wear of the plating or burrs. Such surface defects will seriously affect the adhesion performance between the cord and the rubber, ultimately leading to potential quality problems in the finished tire. Traditional equipment often cannot completely avoid such damage in the design of the wire laying path.

[0006] 4. Insufficient equipment utilization and production flexibility: Independent single-station equipment occupies a large area and cannot flexibly adapt to changes in production rhythm. Under the flexible production needs of multiple varieties and small batches, traditional single-function equipment is difficult to respond quickly to process changes, which can easily cause equipment to wait for materials or become blocked, becoming a bottleneck in production capacity on the production line.

[0007] Therefore, there is an urgent need in this field for a new type of take-up and unwinding unit that can quickly and seamlessly switch between take-up and unwinding modes, effectively protect the surface quality of the wire, and significantly improve equipment utilization and production flexibility. Summary of the Invention

[0008] The purpose of this utility model is to provide a steel cord double-drum active take-up and unwinding unit. Through the coordinated design of the drum device and the positioning mechanism, and by controlling the connection and separation of the locking rod driven by the horizontal cylinder and the fastening screw on the sleeve body, the two states of locking and free release of the sleeve body can be switched, realizing the rapid and automated switching of take-up / unwinding mode, and revolutionizing the production efficiency.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a steel cord double-drum active winding and unwinding machine, which includes a frame, two drum devices, two wire feeders, two material drum assembly devices and two drive devices; The frame includes a base frame, which has two material cylinder mounting positions. The area of ​​the base frame away from the material cylinder mounting positions is a chamber. A vertical frame is fixed to the rear top area of ​​the base frame. A platform is formed between the front top area of ​​the base frame and the front side of the vertical frame. The cable guide is a mechanical reversing cable guide mechanism, and the two cable guides are respectively installed on the top of the table above the two material cylinder mounting positions; The barrel assembly device includes a transmission top cone mechanism and a pneumatic top cone mechanism respectively disposed on both sides of the barrel mounting position. The drive device is installed in the chamber and is connected to the cable guide and the transmission top cone mechanism through the first transmission mechanism. The winding device includes a winding body, a sleeve body, and a positioning mechanism; The drum body is rotatably mounted on the upper front side of the vertical frame. A wire guide wheel located diagonally above the drum body is fixed on the front top of the vertical frame. The drum body has an inner section, an installation section, and an outer section from the inside to the outside. Both the inner and outer sections are conical structures with the smaller diameter end facing outward. The sleeve is fitted onto the installation section and rotatably connected to the installation section. A lug is fixed on the circumferential side of the sleeve. A mounting frame is fixed on the circumferential side of the sleeve. The mounting frame and the lug are located on opposite sides of the circumferential side of the sleeve. A horizontal plate is fixed on the bottom surface of the mounting frame. A guide wheel tangent to the sleeve is mounted on the horizontal plate. An extension edge is fixed at the outer edge of the cross plate, and a fastening screw is threaded through and connected to the extension edge. The positioning mechanism includes a horizontal cylinder, which is fixed in the vertical frame body. The output end of the horizontal cylinder passes through the front side of the vertical frame body and is fixed with a locking rod. The end of the locking rod is provided with a through hole. When the horizontal cylinder is in the extended state and the extended side is above the locking rod, the sleeve body is fixed to the locking rod by fastening screws and through holes. A motor is fixed inside the vertical frame, and the motor is connected to the drum body through a second transmission mechanism.

[0010] Furthermore, it also includes wire products, which sequentially pass through a wire reel, an inner cylinder section, a guide reel, an outer cylinder section, and a wire guide and are conducted to the area of ​​the material cylinder mounting position.

[0011] Furthermore, two anti-detachment rods are fixed on the horizontal plate, and both anti-detachment rods are in contact with the circumferential side of the guide wheel.

[0012] Furthermore, the driving device is a motor reducer, the first transmission mechanism includes a double-grooved pulley installed at the driving end of the transmission top cone mechanism, the driving end of the cable guide is fixed with a first pulley, the output end of the driving device is fixed with a second pulley, and the first pulley and the second pulley are respectively connected to the two belt grooves of the double-grooved pulley through the first belt body.

[0013] Furthermore, the second transmission mechanism includes a reducer, which is installed in the vertical frame body and its output end is connected to the drum body. The motor output end and the reducer input end are both connected to a third pulley, and a second belt body is provided between the two third pulleys.

[0014] Furthermore, the outer diameter of the mounting section is larger than the outer diameter of the inner cylinder section and the outer cylinder section near the mounting section, and the inner cylinder section and the outer cylinder section are integrally provided with a transition edge on their peripheral surfaces near the mounting section.

[0015] Furthermore, a protective cover is fixed to the top of the tabletop, the protective cover covers the outside of the cable tray, and the protective cover is provided with a cable tray end clearance opening that cooperates with the cable tray.

[0016] This utility model has the following beneficial effects: 1. This utility model, through the coordinated design of the winding device and the positioning mechanism, controls the connection and separation of the locking rod and the fastening screw on the sleeve body by controlling the horizontal cylinder to drive the locking rod. This allows for switching between the locked and free states of the sleeve body, completely avoiding the cumbersome operations of hoisting the I-beam, disassembling parts, and re-threading the main line in traditional methods. It thoroughly solves the core pain points of long downtime and low efficiency during process transitions, providing key equipment support for continuous and automated production. It enables rapid and automated switching between take-up and unwind modes, resulting in a revolutionary improvement in production efficiency.

[0017] 2. This utility model cleverly solves the different needs faced by the intermediate drum during winding and unwinding by switching the state of the sleeve body: when winding, it locks, making the guide wheel a fixed tension control point. Working together with the drum body, it uses friction to establish a stable and reliable tension buffer zone, ensuring that the wire is taut and neatly wound into the rear drum. When unwinding, it releases, making the guide wheel a flexible guide point that can adapt to rotation. It can automatically follow the change of the unwinding point of the wire on the drum body, transforming the harmful sliding friction between the wire and the equipment into healthy rolling friction. This fundamentally avoids scratching the surface of the cord during the unwinding process. The unique locking / releasing mechanism perfectly solves the contradiction between guidance and protection.

[0018] 3. This utility model highly integrates the take-up and unwinding functions into the drum device, eliminating the need for users to purchase separate equipment. The parallel design of the dual drums goes a step further, allowing one station to perform take-up operations while the other station performs unwinding operations, achieving parallelization of functions and seamless integration of production. This greatly improves the overall utilization rate of the equipment and production flexibility. At the same time, the integrated design saves on equipment procurement costs and workshop floor space.

[0019] 4. By incorporating the drive unit and synchronously driving the wire feeder and drum rotation through the first transmission mechanism, this utility model ensures strict synchronization between wire feeding accuracy and winding / unwinding speed. The drum body is driven by an independent motor, which can provide active winding / unwinding power or damping control as needed. It has ample power and flexible control, a reasonable drive layout, and precise and efficient transmission.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a schematic diagram of the structure of the reel device of this utility model; Figure 2 This is a front view of the structure of this utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a rear view of the structure of this utility model; The attached diagram lists the components represented by each number as follows: 1-Rolling device, 2-Wire guide, 3-Roller assembly device, 4-Drive device, 5-Base frame, 6-Vertical frame body, 7-Rolling body, 8-Sleeve body, 9-Positioning mechanism, 10-Wire guide wheel, 11-Motor, 12-Reducer, 13-Third pulley, 14-Second belt body, 15-Guard cover, 201-First pulley, 301-Transmission top cone mechanism, 302-Pneumatic center mechanism, 303-Second pulley, 4 01-Double belt grooved pulley, 402-First belt body, 501-Cylinder mounting position, 502-Cavity, 503-Table surface, 701-Inner cylinder section, 702-Mounting section, 703-Outer cylinder section, 704-Transition edge, 801-Support lug, 802-Anti-detachment rod, 803-Mounting bracket, 804-Horizontal plate, 805-Guide pulley, 806-Extension edge, 807-Fasting screw, 901-Horizontal cylinder, 902-Locking rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 As shown, this utility model is a steel cord double-drum active winding and unwinding machine, including a frame, two drum devices 1, two wire guides 2, two material drum assembly devices 3, and two drive devices 4. The frame includes a base frame 5, which has two material cylinder mounting positions 501. The position of the base frame 5 away from the material cylinder mounting positions 501 is a chamber 502. A vertical frame 6 is fixed to the rear top area of ​​the base frame 5. A table 503 is formed between the front top area of ​​the base frame 5 and the front side of the vertical frame 6. The wire guide 2 is a mechanical reversing wire guide mechanism. Two wire guides 2 are respectively installed on the top of the platform 503 above the two material cylinder mounting positions 501. The mechanical reversing principle of the wire guide 2 is to forcibly change the direction of movement through a set of purely mechanical mechanisms (such as levers and clutches). The component has a reversing mechanism at the end of the screw, which usually includes a spiral groove, a fork, and a clutch. There is an adjustable stop block on the slide. Its working process is that the input end rotates continuously in one direction. When the slide moves to one end, the stop block on it will push the lever on the reversing mechanism. This action will trigger the internal clutch, causing the transmission chain between the screw and the motor to change, thereby reversing the direction of movement of the nut. The slide moves in the opposite direction, and the stop block at the other end will trigger the reversing again. The barrel assembly device 3 includes a transmission top cone mechanism 301 and a pneumatic top cone mechanism 302 respectively disposed on both sides of the barrel mounting position 501. The drive device 4 is installed in the chamber 502 and is connected to the cable guide 2 and the transmission top cone mechanism 301 through the first transmission mechanism. The winding device 1 includes a winding body 7, a sleeve body 8, and a positioning mechanism 9; The drum body 7 is rotatably mounted on the upper front side of the vertical frame body 6. The top front side of the vertical frame body 6 is fixed with a wire guide wheel 10 located diagonally above the drum body 7. The drum body 7 has an inner section 701, an installation section 702 and an outer section 703 respectively from the inside to the outside. Both the inner section 701 and the outer section 703 are conical structures with the small diameter end facing outward. The sleeve body 8 is fitted onto the mounting section 702 and is rotatably connected to the mounting section 702. The sleeve body 8 has a support lug 801 fixed on its circumferential side and a mounting bracket 803 fixed on its circumferential side. The mounting bracket 803 and the support lug 801 are located on opposite sides of the sleeve body 8. A horizontal plate 804 is fixed on the bottom surface of the mounting bracket 803. A guide wheel 805 tangent to the sleeve body 8 is installed on the horizontal plate 804. An extension edge 806 is fixed at the outer edge of the horizontal plate 804, and a fastening screw 807 is threaded through and connected to the extension edge 806. The positioning mechanism 9 includes a horizontal cylinder 901, which is fixed inside the vertical frame 6. The output end of the horizontal cylinder 901 passes through the front side of the vertical frame 6 and is fixed with a locking rod 902. The end of the locking rod 902 is provided with a through hole. When the horizontal cylinder 901 is in the extended state and the extension side 806 is above the locking rod 902, the sleeve body 8 is fixed to the locking rod 902 by the fastening screw 807 and the through hole. A motor 11 is fixed inside the vertical frame 6, and the motor 11 is connected to the drum body 7 through the second transmission mechanism.

[0025] This also includes wire products, which pass sequentially through the wire reel 10, inner cylinder section 701, guide reel 805, outer cylinder section 703 and wire guide 2 and are conducted to the area of ​​the material cylinder installation position 501.

[0026] Among them, such as Figure 1 As shown, two anti-detachment rods 802 are fixed on the horizontal plate 804, and both anti-detachment rods 802 are in contact with the peripheral side of the guide wheel 805.

[0027] Among them, such as Figure 3 As shown, the drive device 4 is a motor reducer. The first transmission mechanism includes a double-belt grooved pulley 401 installed at the drive end of the transmission top cone mechanism 301. The drive end of the cable guide 2 is fixed with a first pulley 201, and the output end of the drive device 4 is fixed with a second pulley 303. The first pulley 201 and the second pulley 303 are respectively connected to the two belt grooves of the double-belt grooved pulley 401 through the first belt body 402.

[0028] Among them, such as Figure 3 As shown, the second transmission mechanism includes a reducer 12, which is installed inside the vertical frame 6 and its output end is connected to the drum body 7. The output end of the motor 11 and the input end of the reducer 12 are both connected to a third pulley 13, and a second belt body 14 is provided between the two third pulleys 13.

[0029] Among them, such as Figure 1 and Figure 3 As shown, the outer diameter of the mounting section 702 is larger than the outer diameter of the inner cylinder section 701 and the outer cylinder section 703 near the mounting section 702. The inner cylinder section 701 and the outer cylinder section 703 are integrally provided with a transition edge 704 on the circumferential side near the mounting section 702.

[0030] Among them, such as Figure 2-4 As shown, a protective cover 15 is fixed on the top of the table 503. The protective cover 15 covers the outside of the cable tray 2. The protective cover 15 is provided with a cable tray end clearance opening that cooperates with the cable tray 2.

[0031] The working principle of this utility model is as follows: 1. Receiving mode: Sleeve body state: The horizontal cylinder 901 extends, and the locking rod 902 locks the fastening screw 807 on the sleeve body 8, so that the sleeve body 8 is fixed on the vertical frame body 6 and cannot rotate.

[0032] Wire path: The wire product passes through the wire reel 10 - the inner drum section 701 of the drum - the guide reel 805 - the outer drum section 703 of the drum - the wire guide 2, and is finally wound onto the drum on the drum assembly device 3; The sleeve body 8 is connected and fastened to the vertical frame body 6 by the locking rod 902 and the fastening screw 807, and has the following characteristics: Establishing and maintaining tension: The pulling force of the winding ultimately comes from the rotating drum. The wire winds around the drum body 7, and a tension buffer is formed on the surface of the drum body 7 by friction. If the sleeve body 8 (with the guide wheel 805) is free, it will be pulled and rotated by the wire, which will cause the wire to not generate enough frictional resistance on the drum body 7. Tension cannot be established, the wire will become loose, and neat winding cannot be achieved.

[0033] Providing a stable threading path: The locked sleeve body 8 ensures that the position of the guide wheel 805 is fixed, thereby determining the winding angle and tension point of the wire on the drum body 7, which is a prerequisite for forming a stable and controllable tension field.

[0034] 2. Laying out the cable: Sleeve body state: The horizontal cylinder 901 retracts, the locking rod 902 separates from the sleeve body 8, and at this time the sleeve body 8 is released and can rotate freely around the drum body 7.

[0035] Wire path: The wire product is reversed from the take-up path. The wire product is unwound from the barrel on the barrel assembly device 3, passes through the wire guide 2-outer barrel section 703-guide wheel 805-inner barrel section 701-guide wheel 10, and is finally conducted to the external equipment.

[0036] Among them, the sleeve body 8 and the vertical frame body 6 are in a separated state, and have the following characteristics: To adapt to changes in the unwinding point and protect the wire: When the wire is unwound from the drum 7, the unwinding point will move axially as the number of wire layers decreases. If the guide wheel 805 is locked, the wire segment from the moving unwinding point to the fixed guide wheel 805 will laterally scrape and squeeze the edge of the drum 7 (especially the edge of the tapered segment), severely damaging the surface of the cord.

[0037] Achieving adaptive guidance: Once the sleeve body 8 is released, the tension of the wire will naturally drag the guide wheel 805, causing the entire sleeve body 8 to rotate around the drum body 7 and automatically adjust to the optimal position. This position ensures that the wire is smoothly drawn out from the drum body 7 in the tangential direction, turning harmful sliding friction into healthy rolling friction on the guide wheel 805, which greatly protects the quality of the wire.

[0038] Reduced wire feeding resistance: The adaptive guide wheel 805 keeps the wire feeding path in the smoothest state at all times, reducing the overall wire feeding tension and reducing the load on subsequent equipment.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A double-drum active take-up and unwinding machine for steel cord, characterized in that: It includes a frame, two drum units (1), two wire guides (2), two drum assembly units (3), and two drive units (4). The frame includes a base frame (5), which has two material cylinder mounting positions (501). The position of the base frame (5) away from the material cylinder mounting positions (501) is a chamber (502). A vertical frame (6) is fixed to the rear top area of ​​the base frame (5). A platform (503) is formed between the front top area of ​​the base frame (5) and the front side of the vertical frame (6). The cable guide (2) is a mechanical reversing cable guide mechanism. The two cable guides (2) are respectively installed on the top of the table (503) above the two material cylinder mounting positions (501); The barrel assembly device (3) includes a transmission top cone mechanism (301) and a pneumatic top cone mechanism (302) respectively disposed on both sides of the barrel mounting position (501). The drive device (4) is installed in the chamber (502) and is connected to the cable tray (2) and the transmission top cone mechanism (301) through the first transmission mechanism. The winding device (1) includes a winding body (7), a sleeve body (8), and a positioning mechanism (9). The drum body (7) is rotatably mounted on the upper front side of the vertical frame body (6). A wire guide wheel (10) located diagonally above the drum body (7) is fixed on the front top of the vertical frame body (6). The drum body (7) has an inner section (701), an installation section (702), and an outer section (703) from the inside to the outside. The inner section (701) and the outer section (703) are both conical structures with the small diameter end facing outward. The sleeve (8) is fitted onto the mounting section (702) and rotatably connected to the mounting section (702). The sleeve (8) has a lug (801) fixed on its circumferential side. The sleeve (8) has a mounting bracket (803) fixed on its circumferential side. The mounting bracket (803) and the lug (801) are located on opposite sides of the sleeve (8). The mounting bracket (803) has a horizontal plate (804) fixed on its bottom surface. A guide wheel (805) tangent to the sleeve (8) is mounted on the horizontal plate (804). An extension edge (806) is fixed at the outer edge of the horizontal plate (804), and a fastening screw (807) is threaded through and connected to the extension edge (806). The positioning mechanism (9) includes a horizontal cylinder (901), which is fixed inside the vertical frame (6). The output end of the horizontal cylinder (901) passes through the front side of the vertical frame (6) and is fixed with a locking rod (902). The end of the locking rod (902) is provided with a through hole. When the horizontal cylinder (901) is in the extended state and the extension side (806) is above the locking rod (902), the sleeve body (8) is fixed to the locking rod (902) by fastening screw (807) and through hole. A motor (11) is fixed inside the vertical frame (6), and the motor (11) is connected to the drum body (7) through a second transmission mechanism.

2. The steel cord double-drum active take-up and unwinding machine according to claim 1, characterized in that, It also includes wire products, which pass sequentially through the wire reel (10), inner cylinder section (701), guide reel (805), outer cylinder section (703) and wire guide (2) and are conducted to the area of ​​the material cylinder mounting position (501).

3. The steel cord double-drum active winding and unwinding machine according to claim 1, characterized in that, Two anti-detachment rods (802) are fixed on the horizontal plate (804), and both anti-detachment rods (802) are in contact with the circumferential side of the guide wheel (805).

4. The steel cord double-drum active winding and unwinding machine according to claim 1, characterized in that, The driving device (4) is a motor reducer. The first transmission mechanism includes a double belt grooved pulley (401) installed at the driving end of the transmission top cone mechanism (301). The driving end of the cable tray (2) is fixed with a first pulley (201). The output end of the driving device (4) is fixed with a second pulley (303). The first pulley (201) and the second pulley (303) are respectively connected to the two belt grooves of the double belt grooved pulley (401) through the first belt body (402).

5. The steel cord double-drum active winding and unwinding machine according to claim 1, characterized in that, The second transmission mechanism includes a reducer (12), which is installed inside the vertical frame (6) and its output end is connected to the drum body (7). The output end of the motor (11) and the input end of the reducer (12) are both connected to a third pulley (13), and a second belt body (14) is provided between the two third pulleys (13).

6. The steel cord double-drum active take-up and unwinding machine according to claim 1, characterized in that, The outer diameter of the installation section (702) is larger than the outer diameter of the inner cylinder section (701) and the outer cylinder section (703) near the end of the installation section (702). The inner cylinder section (701) and the outer cylinder section (703) are integrally provided with a transition edge (704) on the circumferential side near the end of the installation section (702).

7. A double-drum active take-up and unwinding unit for steel cord according to claim 1, characterized in that, The top of the tabletop (503) is fixed with a cover (15), which covers the outside of the cable tray (2). The cover (15) has a cable tray end clearance opening that cooperates with the cable tray (2).

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