Full-automatic spreading machine for garment production

Abstract

The invention discloses a full-automatic spreading machine for garment production, and relates to the technical field of spreading machines, the full-automatic spreading machine is technically characterized by comprising a workbench and rectangular grooves symmetrically formed in the workbench, a spreading mechanism is arranged at the top of the workbench, the spreading mechanism comprises a cloth cylinder mounting assembly and a trowelling assembly, and the trowelling assembly comprises a right-angle frame; the right-angle frame is internally provided with a lower auxiliary wheel mounting groove, the inner side of the lower auxiliary wheel mounting groove is rotatably connected with a lower auxiliary wheel, and through the matched design of the cloth barrel mounting assembly and the trowelling assembly and the clamping and guiding effects of the lower auxiliary wheel and the upper auxiliary wheel in the trowelling assembly on cloth strips, the cloth strips can be troweled, so that the cloth strips can be troweled; and meanwhile, a first electric telescopic rod can adjust tension according to the material and thickness of the cloth, so that the problem that the cloth is prone to wrinkling in the automatic cloth pulling process is effectively solved, stable cloth pulling and efficient trowelling of the cloth are achieved, and the cloth pulling efficiency is improved. And the universality, the practicability and the product quality of the equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of cloth-pulling machines, in particular to a fully automatic cloth-pulling machine for garment production. Background Art

[0002] A cloth spreading machine is a machine specially used for making cloth. Due to the characteristics of flexible materials, cloth is mostly rolled during the production process and is also transported in roll form. When these rolls of cloth arrive at the user's factory, in order to facilitate subsequent cutting and use, an important process is to convert them from rolls into a multi-layer flat state. Therefore, automatic cloth spreading machines, automatic cloth spreading machines and other automated production equipment came into being. They can efficiently complete this task and improve production efficiency.

[0003] However, in the process of the automatic cloth-pulling machine pulling the cloth, the cloth is prone to wrinkles. These wrinkles not only affect the appearance quality of the cloth, but also have a great impact on the accuracy of the cloth cutting by the staff in the subsequent process. Therefore, we propose a new type of fully automatic cloth-pulling machine for clothing production. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a fully automatic cloth-pulling machine for clothing production, which solves the problem that cloth wrinkles are easily generated during the cloth-pulling process of the cloth-pulling machine.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fully automatic cloth-pulling machine for clothing production, comprising a workbench and rectangular grooves symmetrically arranged on the workbench, wherein a cloth-pulling mechanism is arranged on the top of the workbench.

[0006] The cloth pulling mechanism comprises a cloth drum mounting assembly and a smoothing assembly.

[0007] The smoothing assembly includes a right-angle frame, a lower auxiliary wheel mounting groove is opened inside the right-angle frame, the lower auxiliary wheel is rotatably connected to the inner side of the lower auxiliary wheel mounting groove, a mounting block is symmetrically installed on the top of the right-angle frame, the inner side of the mounting block is rotatably connected to the upper auxiliary wheel tangent to the lower auxiliary wheel, an L frame is fixedly installed on the right-angle frame, a clamping rod that passes through the L frame is slidably connected to the L frame, a telescopic spring that is fixedly installed on the clamping rod and fixedly installed at the bottom of the L frame is wound around the clamping rod, a trowel plate is fixedly installed on the lower end of the clamping rod, and the telescopic spring is located between the L frame and the trowel plate.

[0008] Preferably, the cloth drum mounting assembly includes a screw which is rotatably connected to the inner cavity of the rectangular groove and passes through the rectangular groove, one end of the screw is fixedly mounted with a motor fixedly connected to the workbench, the output end of the motor is fixedly connected to the screw, a ball screw block which is adapted to the rectangular groove is threadedly connected to the screw, an H frame is fixedly mounted on the top of the ball screw block, a first electric telescopic rod is fixedly mounted at the center of the top of the H frame, and a U frame is fixedly mounted on the output end of the first electric telescopic rod.

[0009] Preferably, a cloth drum mounting block is fixedly installed on the top of the U frame, and the cloth drum mounting block is fixedly connected to the right-angle frame. A shaft rod that passes through the cloth drum mounting block is movably installed on the cloth drum mounting block, and mounting nuts are threadedly connected at both ends of the shaft rod located on the outside of the cloth drum mounting block, and clamping blocks adapted to the shaft rod are movably installed at both ends of the shaft rod located on the inside of the cloth drum mounting block, a positioning rod is threadedly connected to the clamping block, and a cloth drum rotatably connected to the shaft rod is provided on the inner side of the clamping block.

[0010] Preferably, a gantry is fixedly installed at one end of the top of the workbench, a second electric telescopic rod is fixedly installed at the center of the bottom of the gantry, a pressure plate is fixedly installed at the output end of the second electric telescopic rod, and a rubber plate is fixedly installed at the bottom of the pressure plate.

[0011] Preferably, a conductive groove bar is symmetrically installed on the top of the workbench below the L frame, a conductive sliding column is slidably connected to the inner cavity of the conductive groove bar, and the top end of the conductive sliding column is fixedly connected to the L frame.

[0012] Preferably, grounding conductive rods penetrating the workbench are fixedly mounted at both ends of the bottom of the conductive groove strip.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention effectively solves the problem of wrinkles that are easy to appear in the cloth strips during the cloth pulling process by providing a smoothing component. The cloth strips in the smoothing component will be clamped and guided by the lower auxiliary wheel and the upper auxiliary wheel, so that the cloth strips can be smoothly unfolded, ensuring that the cloth strips can remain flat in the initial stage. At the same time, the trowel plate will cling to the surface of the cloth strips under the action of the telescopic spring, and further smooth the cloth strips, thereby improving the flatness of the cloth. In addition, the first electric telescopic rod can adjust the height of the U frame and the cloth drum mounting block as needed, thereby changing the tension of the cloth strips. This design enables the cloth pulling machine to adapt to cloth of different materials and thicknesses, thereby improving the versatility and practicality of the equipment.

[0015] 2. The present invention realizes stable cloth pulling and efficient smoothing by providing a cloth drum installation component and an auxiliary smoothing component. The cloth drum installation component can stably install the cloth drum and ensure that the cloth strip can be smoothly unfolded during the cloth pulling process. At the same time, the close cooperation between the cloth drum installation component and the smoothing component enables the cloth strip to be smoothed in time while being unfolded, thereby avoiding wrinkles in the cloth strip during the cloth pulling process. This design not only improves production efficiency, but also ensures the quality of the cloth.

[0016] 3. The present invention effectively avoids the influence of static electricity on the smoothing operation by providing conductive groove strips, conductive slide columns and grounded conductive rods. During the cloth pulling process, the contact between the cloth strip and the lower auxiliary wheel and the upper auxiliary wheel, as well as the tension of the cloth strip itself, may generate a certain amount of static electricity. However, the conductive structure in the present invention can conduct this static electricity into the ground, thereby eliminating the adverse effect of static electricity on the smoothing operation of the cloth strip. This design not only ensures the stability of the smoothing operation, but also improves the quality of the finished cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 For the present invention Figure 1 A partially enlarged structural schematic diagram;

[0019] Figure 3 For the present invention Figure 1 Another perspective structural diagram of;

[0020] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A above;

[0021] Figure 5 For the present invention Figure 3 A schematic diagram of a top view structure;

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of a partial cross-section structure.

[0023] In the figure:

[0024] 1. Workbench;

[0025] 2. Rectangular slot;

[0026] 3. Fabric pulling mechanism;

[0027] 31. Cloth drum installation assembly; 311. Screw rod; 312. Motor; 313. Ball screw block; 314. H frame; 315. First electric telescopic rod; 316. U frame; 317. Cloth drum installation block; 318. Shaft rod; 319. Mounting nut; 3191. Block; 3110. Positioning rod; 3111. Cloth drum;

[0028] 32. Smoothing assembly; 321. Right angle bracket; 322. Lower auxiliary wheel mounting groove; 323. Lower auxiliary wheel; 324. Mounting block; 325. Upper auxiliary wheel; 326. L bracket; 327. Pressing rod; 328. Telescopic spring; 329. Smoothing plate;

[0029] 4. Gantry;

[0030] 5. Second electric telescopic rod;

[0031] 6. Press plate;

[0032] 7. Conductive groove strips;

[0033] 8. Conductive sliding column;

[0034] 9. Grounding conductive rod. DETAILED DESCRIPTION

[0035] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0036] See also Figures 1 to 6 , including a workbench 1 and a rectangular groove 2 symmetrically opened on the workbench 1, a cloth pulling mechanism 3 is arranged on the top of the workbench 1, and the cloth pulling mechanism 3 includes a cloth tube installation component 31 and a smoothing component 32.

[0037] The smoothing assembly 32 includes a right-angle frame 321, a lower auxiliary wheel mounting groove 322 is opened inside the right-angle frame 321, the inner side of the lower auxiliary wheel mounting groove 322 is rotatably connected to the lower auxiliary wheel 323, a mounting block 324 is symmetrically installed on the top of the right-angle frame 321, the inner side of the mounting block 324 is rotatably connected to the upper auxiliary wheel 325 tangential to the lower auxiliary wheel 323, an L frame 326 is fixedly installed on the right-angle frame 321, a clamping rod 327 that passes through the L frame 326 is slidably connected to the L frame 326, a telescopic spring 328 fixedly installed at the bottom of the L frame 326 is wound around the clamping rod 327, a trowel plate 329 is fixedly installed on the lower end of the clamping rod 327, the telescopic spring 328 is located between the L frame 326 and the trowel plate 329, when the smoothing assembly 32 is working, the cloth strip passes between the lower auxiliary wheel 323 and the upper auxiliary wheel 325, the two form a clamping and guiding effect on the cloth strip, to ensure that the cloth strip moves forward stably. Subsequently, the cloth strip enters the action area of ​​the trowel plate 329. Since the compression rod 327 is wound with a telescopic spring 328, the trowel plate 329 is tightly attached to the surface of the cloth strip under the action of the elastic force of the telescopic spring 328, and the cloth strip is smoothed in real time. As the cloth pulling mechanism continues to move, the trowel plate 329 continuously smoothes the cloth strip to ensure that the cloth strip is wrinkle-free. The smoothing component 32 is guided by the clamping of the lower auxiliary wheel 323 and the upper auxiliary wheel 325, and the trowel plate 329 is tightly smoothed under the action of the telescopic spring 328, which effectively solves the problem of wrinkles easily generated in the cloth pulling process, realizes stable cloth pulling and efficient smoothing of the cloth, thereby improving the efficiency and quality of clothing production, and also improving the versatility and practicality of the equipment.

[0038] Furthermore, the cloth drum mounting assembly 31 includes a screw 311 rotatably connected to the inner cavity of the rectangular groove 2 and passing through the rectangular groove 2, one end of the screw 311 is fixedly installed with a motor 312 fixedly connected to the workbench 1, the output end of the motor 312 is fixedly connected to the screw 311, and a ball screw block 313 adapted to the rectangular groove 2 is threadedly connected to the screw 311, and an H frame 314 is fixedly installed on the top of the ball screw block 313, and a first electric telescopic rod 315 is fixedly installed at the center of the top of the H frame 314, and a U frame 316 is fixedly installed on the output end of the first electric telescopic rod 315. The cloth drum mounting assembly 31 drives the screw 311 to rotate in the inner cavity of the rectangular groove 2 through the motor 312. Since the screw 311 is threadedly connected to the ball screw block 313, the rotation of the screw 311 will drive the ball screw block 313 to move left and right in the rectangular groove 2. The H frame 314 fixed on the top of the ball screw block 313 moves accordingly, thereby driving the first electric telescopic rod 315 and the U frame 316 to move, and the cloth tube mounting block and other components installed on the U frame also adjust their positions accordingly. During the cloth pulling process, the cloth strips are released from the cloth tube and processed by the smoothing assembly. The function of the cloth tube mounting assembly 31 is to firmly install the cloth tube, and to achieve precise positioning and smooth movement of the cloth tube in the cloth pulling direction through the motor drive and screw transmission mechanism, ensuring that the cloth strips can be smoothly unfolded, providing a stable cloth source for subsequent smoothing work, and also facilitating the adjustment of the cloth strip position according to actual needs, thereby enhancing the flexibility and automation of the equipment.

[0039] Further, a cloth tube mounting block 317 is fixedly installed on the top of the U frame 316, and the cloth tube mounting block 317 is fixedly connected to the right angle frame 321. A shaft rod 318 that passes through the cloth tube mounting block 317 is movably installed on the cloth tube mounting block 317. The two ends of the shaft rod 318 located on the outside of the cloth tube mounting block 317 are threadedly connected with mounting nuts 319. The two ends of the shaft rod 318 located on the inside of the cloth tube mounting block 317 are movably installed with a clamping block 3191 that is adapted to the shaft rod 318. A positioning rod 3110 is threadedly connected to the clamping block 3191. A cloth tube 3111 that is rotatably connected to the shaft rod 318 is provided on the inner side of the clamping block 3191. The cloth tube mounting block 317 is firmly installed on the top of the U frame 316, and the cloth tube mounting block 317 is further fixedly connected to the right angle frame 321. The cloth tube mounting block 317 is designed with a movably installed shaft rod 318, and the shaft rod 318 can pass through the cloth tube mounting block 317. When the cloth drum needs to be installed, the shaft rod 318 first passes through the center hole of the cloth drum, and then the nuts 319 are installed on the threaded connections at both ends of the shaft rod 318 located on the outside of the cloth drum mounting block 317, so as to firmly fix the shaft rod 318 and the cloth drum. This design facilitates the rapid installation and removal of the cloth drum, and improves work efficiency. This structure plays a role in supporting and stabilizing the cloth drum in the fully automatic cloth pulling machine, ensuring the smooth rotation of the cloth drum during the cloth pulling process. At the same time, through the cooperation of the shaft rod 318 and the mounting nut 319, the convenient installation and fixation of the cloth drum is realized, which enhances the adaptability and ease of operation of the equipment and provides a solid foundation for the subsequent automated cloth pulling process.

[0040] Furthermore, a gantry 4 is fixedly installed at one end of the top of the workbench 1, a second electric telescopic rod 5 is fixedly installed at the center of the bottom of the gantry 4, a pressing plate 6 is fixedly installed at the output end of the second electric telescopic rod 5, and a rubber plate is fixedly installed at the bottom of the pressing plate 6. At one end of the top of the workbench 1, the gantry 4 is firmly installed, and the second electric telescopic rod 5 is configured at the center of its bottom. When the second electric telescopic rod 5 is started, its output end drives the pressing plate 6 to descend, and the rubber plate installed at the bottom of the pressing plate 6 is in close contact with and compacts the cloth. This design not only significantly improves the flatness of the cloth, but also ensures the stability of the shape and size of the cloth during subsequent cutting and use, and is a key link in achieving efficient cloth processing in a fully automatic cloth stretching machine.

[0041] Furthermore, the top of the workbench 1 is located below the L frame 326 and is symmetrically installed with a conductive groove strip 7. The inner cavity of the conductive groove strip 7 is slidably connected with a conductive slide post 8. The top of the conductive slide post 8 is fixedly connected to the L frame 326. At the top of the workbench 1, located below the L frame 326, the conductive groove strip 7 is symmetrically installed. The L frame 326 is slidably connected in the inner cavity of the conductive groove strip 7 through the conductive slide post 8 at its bottom, ensuring the conductive continuity of the L frame 326 during movement. This design ensures that if static electricity is generated during the cloth pulling process, the static electricity can be quickly introduced into the conductive groove strip 7 through the conductive slide post 8, and then introduced into the ground through the grounded conductive rod 9 at its bottom, effectively eliminating the influence of static electricity on the cloth strip smoothing operation, and ensuring the stability of the automatic cloth pulling machine and the quality of cloth processing.

[0042] Furthermore, grounding conductive rods 9 that penetrate the workbench 1 are fixedly installed at both ends of the bottom of the conductive groove strip 7. Grounding conductive rods 9 that penetrate the entire workbench 1 are fixedly installed at both ends of the bottom of the conductive groove strip 7. This design ensures that static electricity can be smoothly transferred from the conductive groove strip 7 to the ground. The setting of the grounding conductive rods 9 enables the static electricity generated during the cloth pulling operation to be guided through the conductive groove strip 7 and safely introduced into the ground along the grounding conductive rods 9, effectively preventing the interference of static electricity accumulation on the cloth strip smoothing process, and ensuring the efficient and stable operation of the fully automatic cloth pulling machine and the cloth processing quality.

[0043] When used specifically, the working principle of the present invention is as follows:

[0044] When using the device, first put the cloth cylinder 3111 into the cloth cylinder mounting block 317, and then use the shaft 318 to pass through the center holes of the cloth cylinder mounting block 317 and the cloth cylinder 3111 in sequence. Subsequently, the mounting nuts 319 are threadedly installed on both ends of the shaft 318 located outside the cloth cylinder mounting block 317, so that the shaft 318 and the cloth cylinder 3111 are firmly installed on the cloth cylinder mounting block 317. Next, at both ends of the shaft 318 located inside the cloth cylinder mounting block 317, that is, at both ends of the cloth cylinder 3111, the clamping blocks 3191 are clamped onto the shaft 318. When the clamping blocks 3191 are exactly located at both ends of the cloth cylinder 3111, the positioning rod 3110 on the cloth cylinder 3111 is rotated so that its lower end is tightly pressed and contacted with the shaft 318, so that the cloth cylinder 3111 can be effectively prevented from being offset during the cloth pulling process, thereby ensuring the stability of the cloth pulling.

[0045] When the cloth tube 3111 is fixed, pull out one end of the cloth strip on the cloth tube 3111 and make it pass through the gap between the cloth tube mounting block 317, the lower auxiliary wheel 323 and the upper auxiliary wheel 325 in sequence. At this time, the cloth strip will be clamped and guided by the lower auxiliary wheel 323 and the upper auxiliary wheel 325, so that the cloth strip can be smoothly unfolded. In this process, due to the contact between the cloth strip and the lower auxiliary wheel 323 and the upper auxiliary wheel 325, as well as the tension of the cloth strip itself, a certain amount of static electricity may be generated. However, in order to avoid the adverse effect of static electricity on the smoothing operation, the device is specially designed with a conductive structure.

[0046] Specifically, the L frame 326 on the right angle frame 321 is slidably connected to the conductive groove strip 7 below through the conductive slide post 8. During the cloth pulling process, if static electricity is generated, the static electricity will be introduced into the conductive groove strip 7 through the conductive slide post 8. Subsequently, the static electricity will be transferred along the conductive groove strip 7 to the grounded conductive rod 9 at the bottom thereof. Finally, the grounded conductive rod 9 introduces the static electricity into the ground, thereby effectively eliminating the influence of static electricity on the cloth strip smoothing operation.

[0047] As the cloth strip is continuously pulled out and passes through the smoothing assembly 32, the smoothing plate 329 will be pressed against the surface of the cloth strip under the action of the telescopic spring 328 to smooth the cloth strip. At the same time, the first electric telescopic rod 315 can adjust the height of the U frame 316 and the cloth tube mounting block 317 as needed, thereby changing the tension of the cloth strip to adapt to cloth of different materials and thicknesses. The motor 312 drives the screw rod 311 to rotate, driving the ball screw block 313 and the H frame 314 to move in the rectangular groove 2, thereby realizing the lateral movement of the cloth pulling mechanism and completing the automatic cloth pulling operation.

[0048] In addition, when the cloth needs to be flattened, the second electric telescopic rod 5 can be started, so that its output end pushes the pressing plate 6 down, and the cloth is compacted by the rubber plate at the bottom of the pressing plate 6. This can not only further improve the flatness of the cloth, but also ensure that the cloth can maintain a stable shape and size during subsequent cutting and use.

[0049] In summary, the fully automatic cloth-pulling machine for clothing production, through careful structural design and functional configuration, not only realizes the automatic pulling and smoothing of cloth, but also effectively eliminates the influence of static electricity on operation, thereby improving production efficiency and product quality.

[0050] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A fully automatic cloth-pulling machine for garment production, comprising a workbench (1) and rectangular slots (2) symmetrically arranged on the workbench (1), characterized in that: A cloth pulling mechanism (3) is provided on the top of the workbench (1); The cloth pulling mechanism (3) comprises a cloth drum mounting assembly (31) and a smoothing assembly (32); The smoothing assembly (32) comprises a right-angle frame (321), a lower auxiliary wheel mounting groove (322) is provided inside the right-angle frame (321), a lower auxiliary wheel (323) is rotatably connected to the inner side of the lower auxiliary wheel mounting groove (322), a mounting block (324) is symmetrically mounted on the top of the right-angle frame (321), an upper auxiliary wheel (325) tangential to the lower auxiliary wheel (323) is rotatably connected to the inner side of the mounting block (324), and the right-angle frame (321) is provided with a plurality of lower auxiliary wheels (323) and a plurality of upper auxiliary wheels (325) tangential to the lower auxiliary wheel (323). An L frame (326) is fixedly mounted on the frame (321), a pressing rod (327) penetrating the L frame (326) is slidably connected to the L frame (326), a telescopic spring (328) fixedly mounted on the bottom of the L frame (326) is wound around the pressing rod (327), a trowel plate (329) is fixedly mounted on the lower end of the pressing rod (327), and the telescopic spring (328) is located between the L frame (326) and the trowel plate (329).

2. The fully automatic cloth stretching machine for clothing production according to claim 1, characterized in that: The cloth drum mounting assembly (31) comprises a screw rod (311) rotatably connected to the inner cavity of the rectangular groove (2) and penetrating the rectangular groove (2); a motor (312) fixedly connected to the workbench (1) is fixedly mounted on one end of the screw rod (311); an output end of the motor (312) is fixedly connected to the screw rod (311); a ball screw block (313) adapted to the rectangular groove (2) is threadedly connected to the screw rod (311); an H frame (314) is fixedly mounted on the top of the ball screw block (313); a first electric telescopic rod (315) is fixedly mounted at the center of the top of the H frame (314); and a U frame (316) is fixedly mounted on the output end of the first electric telescopic rod (315).

3. The fully automatic cloth stretching machine for clothing production according to claim 2, characterized in that: A cloth drum mounting block (317) is fixedly installed on the top of the U frame (316), and the cloth drum mounting block (317) is fixedly connected to the right-angle frame (321). A shaft rod (318) penetrating the cloth drum mounting block (317) is movably installed on the cloth drum mounting block (317), and the two ends of the shaft rod (318) located on the outside of the cloth drum mounting block (317) are threadedly connected with mounting nuts (319), and the two ends of the shaft rod (318) located on the inside of the cloth drum mounting block (317) are movably installed with a clamping block (3191) adapted to the shaft rod (318), and a positioning rod (3110) is threadedly connected to the clamping block (3191), and a cloth drum (3111) rotatably connected to the shaft rod (318) is arranged on the inner side of the clamping block (3191).

4. The fully automatic cloth stretching machine for clothing production according to claim 1, characterized in that: A gantry (4) is fixedly mounted on one end of the top of the workbench (1), a second electric telescopic rod (5) is fixedly mounted at the center of the bottom of the gantry (4), a pressing plate (6) is fixedly mounted on the output end of the second electric telescopic rod (5), and a rubber plate is fixedly mounted on the bottom of the pressing plate (6).

5. The fully automatic cloth stretching machine for clothing production according to claim 1, characterized in that: A conductive groove strip (7) is symmetrically installed on the top of the workbench (1) below the L frame (326); a conductive sliding column (8) is slidably connected to the inner cavity of the conductive groove strip (7); and the top end of the conductive sliding column (8) is fixedly connected to the L frame (326).

6. The fully automatic cloth stretching machine for garment production according to claim 5, characterized in that: Grounding conductive rods (9) that penetrate the workbench (1) are fixedly mounted at both ends of the bottom of the conductive groove strip (7).

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