Fabric surface coating device

Abstract

The utility model relates to the technical field of fabric production, and discloses a fabric surface coating device which comprises a workbench and a drying mechanism on the workbench, and the drying mechanism comprises a drying box arranged on the upper surface of the workbench; the first motor is arranged on the top plate of the drying box; the rotating shaft is arranged on an output shaft of the first motor; the fan blades are fixedly arranged on the periphery of the rotating shaft; the electric heating wire is arranged in the drying box and below the fan blades; the feeding and discharging opening is formed in the transverse drying box and is arranged below the electric heating wire; the L-shaped plate is arranged in the drying box, a side plate of the L-shaped plate extends to the position below the feeding and discharging opening, and a top plate of the L-shaped plate is arranged between the electric heating wire and the feeding and discharging opening; and the ventilation opening is formed in the side, away from the side plate of the L-shaped plate, of the drying box, and the ventilation opening is formed below the top plate of the L-shaped plate. The fabric surface coating device disclosed by the utility model solves the problem that an adhesive layer is not uniform when existing equipment is used for drying.

Description

Technical Field

[0001] The utility model belongs to the technical field of fabric production, and in particular relates to a fabric surface coating device. Background Art

[0002] Fabric is the material used to make clothing. As one of the three elements of clothing, fabric can not only interpret the style and characteristics of clothing, but also directly affect the color and shape of clothing, showing its own noble perfection and soft feel. With the improvement of people's living standards, the functional requirements for clothing are not limited to warmth and shielding. The fabric coating device is a special process device for processing fabrics. It can form a uniform layer of covering rubber on the surface of the fabric to achieve waterproof, windproof and other functions. The coated fabric uses solvent or water to dissolve the required coating particles into a saliva-like state, and then evenly applies it to the fabric by means of a round screen, scraper, roller, etc., and then fixes it through the temperature in the oven to form a uniform layer of covering rubber on the surface of the fabric. The existing coating device dries the fabric by passing the fabric through a drying box and then drying it. Because the fabrics pass through the drying box through an assembly line, the fabrics are fixed, which makes the drying effect poor, thereby reducing the quality of the product.

[0003] A Chinese utility model patent, publication number CN216500420U, discloses a device for applying a waterproofing agent to waterproof fabrics. A motor rotates a rotating rod, which in turn rotates the fan blades. A first transmission wheel, a second transmission wheel, a transmission belt, a rotating rod, a cam, and a reciprocating mechanism cooperate to move a rubber block up and down against the fabric, causing the fabric to swing back and forth, thereby increasing the fabric's contact with the hot air. Furthermore, by providing air guide plates and air guide holes, the fabric can be heated evenly as it passes through the cabinet, resulting in better drying effects and improved fabric quality. However, this device also has some other problems. For example, the use of a cam on the reciprocating mechanism during drying can result in varying tension on the fabric, leading to uneven application of the colloid. Utility Model Content

[0004] The purpose of the utility model is to provide a fabric surface coating device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: a fabric surface coating device, comprising:

[0006] Workbench;

[0007] A material discharge mechanism, configured on the upper surface of the workbench;

[0008] A coating mechanism is configured on the upper surface of the workbench and on one side of the discharge mechanism;

[0009] A drying mechanism is arranged on the upper surface of the workbench and is arranged on a side of the coating mechanism away from the discharge mechanism;

[0010] a winding mechanism, disposed on the upper surface of the workbench and on a side of the drying mechanism away from the coating mechanism;

[0011] Wherein, the drying mechanism comprises:

[0012] A drying box is arranged on the upper surface of the workbench;

[0013] a first motor, disposed on the top plate of the drying box, and an output shaft of the first motor passes through the top plate of the drying box;

[0014] a rotating shaft, configured on an output shaft of the first motor;

[0015] fan blades, fixedly disposed on the periphery of the rotating shaft;

[0016] An electric heating wire is disposed inside the drying box and below the fan blades;

[0017] The inlet and outlet ports are provided on the left and right side panels of the drying box, and the inlet and outlet ports are arranged below the heating wire;

[0018] An L-shaped plate is placed horizontally inside the drying box, with the top plate of the L-shaped plate being in contact with the three inner walls of the drying box, the side plates of the L-shaped plate extending below the inlet and outlet, and the top plate of the L-shaped plate being arranged between the heating wire and the inlet and outlet;

[0019] A vent is provided on a side of the drying box away from the side plate of the L-shaped plate, and the vent is arranged below the top plate of the L-shaped plate.

[0020] In the above technical solution, further, the discharge mechanism includes:

[0021] A first mounting plate is arranged on the front and rear sides of the upper surface of the workbench;

[0022] The unwinding roller is arranged between the two first mounting plates.

[0023] In any of the above technical solutions, further, the coating mechanism includes:

[0024] a second mounting plate, disposed on the front and rear sides of the upper surface of the workbench;

[0025] a transverse plate, disposed between the two second mounting plates;

[0026] A glue tank is fixedly arranged above the horizontal plate;

[0027] A fixed plate, disposed on one side of the two second mounting plates close to the discharge mechanism;

[0028] A branch pipe fixedly configured between the two fixing plates;

[0029] A connecting pipe is arranged between the glue tank and the branch pipe;

[0030] a nozzle, disposed below the branch pipe;

[0031] a water pump, disposed at a position where the branch pipe is connected to the connecting pipe;

[0032] The glue scraping mechanism is configured between the two second mounting plates.

[0033] In any of the above technical solutions, further, the winding mechanism includes:

[0034] a third mounting plate, disposed on the front and rear sides of the upper surface of the workbench;

[0035] a receiving roller, disposed between the two third mounting plates;

[0036] The second motor is configured on the outer side of one of the third mounting plates, and the output shaft of the second motor passes through the side plate and is connected to the receiving roller.

[0037] In any of the above technical solutions, further, the scraping mechanism includes:

[0038] a screw, disposed between the two second mounting plates;

[0039] A guide rod, fixedly disposed between the two second mounting plates;

[0040] A sliding block is mounted on the screw rod and the guide rod;

[0041] a through groove, formed on the sliding block between the guide rod and the screw rod;

[0042] a screw, disposed inside the through slot;

[0043] A connecting plate, fixedly configured below the screws;

[0044] a scraper, disposed below the connecting plate;

[0045] The third motor is configured on the outer side of one of the second mounting plates, and the output shaft of the third motor passes through the second mounting plate and is fixedly connected to one end of the screw rod.

[0046] Wherein, an internal thread is provided inside the through groove, and the internal thread is engaged with the external thread of the screw.

[0047] The beneficial effects of the utility model are:

[0048] 1. A first motor is provided on the drying box, and the output shaft of the first motor passes through the top plate of the drying box and is fixedly connected to a rotating shaft. Fan blades are fixedly provided on the periphery of the rotating shaft. The fan blades are driven to rotate by the motor, so that the air inside the drying box is heated by the heating wire. The hot air is blocked by the L-shaped plate, and thus flows from the ventilation duct formed by the L-shaped plate and the inside of the drying box to the bottom of the drying box. Because the inlet and outlet are arranged in the middle of the side plate of the L-shaped plate, and the vent is arranged above the inlet and outlet, the hot air can pass through the fabric at the inlet and outlet and then be discharged from the heating box through the vent, so that the fabric can be dried quickly without affecting the flatness of the colloid on the surface of the fabric.

[0049] 2. A scraper mechanism is fixedly arranged between the second mounting plates of the coating mechanism, and the sliding plate of the scraper mechanism can change its position along the direction of the screw and the guide rod. A vertical through slot is opened in the center of the sliding block, and a screw is arranged inside the through slot. A connecting plate is fixedly arranged below the screw, and a scraper is fixedly arranged below the connecting plate. By changing the position of the screw inside the through slot, the position of the scraper can be changed, thereby controlling the thickness of the adhesive layer on the surface of the fabric. At the same time, the motor drives the screw to rotate, so that the sliding block can drive the sliding plate to change its position, thereby scraping off excess colloid on the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural diagram of the utility model;

[0051] Figure 2 It is a structural diagram of the utility model;

[0052] Figure 3 It is a structural diagram of the utility model;

[0053] Figure 4 It is a structural diagram of the utility model;

[0054] Explanation of reference numerals: 100, workbench; 200, discharge mechanism; 210, first mounting plate; 220, discharge roller; 300, coating mechanism; 310, second mounting plate; 320, horizontal plate; 330, glue tank; 340, fixing plate; 350, branch pipe; 360, connecting pipe; 370, nozzle; 380, water pump; 390, scraping mechanism; 391, screw; 392, guide rod; 393, sliding block; 394, guide rod; 395, guide rod; 396, guide rod; 397, guide rod; 398, guide rod; 399, guide rod; 310, guide rod; 311, guide rod; 312, guide rod; 313, guide rod; 314, guide rod; 315, guide rod; 316, guide rod; 317, guide rod; 318, guide rod; 319, guide rod; 320, guide rod; 321, guide rod; 322, guide rod; 323, guide rod; 324, guide rod; 325, guide rod; 326, guide rod; 327, guide rod; 328, guide rod; 329, guide rod; 330, guide rod; 331, guide rod; 332, guide rod; 333, guide rod; 334, guide rod; 335, guide rod; 336, guide rod; 337, guide rod; 338, guide rod; 339, guide rod; 330, guide rod; 330, guide rod; 331, guide rod; 331, guide rod; 332, guide rod; 333, guide rod; 334, guide rod; 335, guide rod; 336, guide rod; 33 4. Through slot; 395. Screw; 396. Connecting plate; 397. Scraper; 398. Third motor; 400. Drying mechanism; 410. Drying box; 420. First motor; 430. Rotating shaft; 440. Fan blade; 450. Heating wire; 460. Inlet and outlet; 470. L-shaped plate; 480. Ventilation port; 500. Winding mechanism; 510. Third mounting plate; 520. Rewinding roller; 530. Second motor. DETAILED DESCRIPTION

[0055] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0056] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0057] like Figure 1-Figure 4 As shown, this embodiment provides a fabric surface coating device, comprising:

[0058] Workbench 100;

[0059] The unloading mechanism 200 is configured on the upper surface of the workbench 100;

[0060] The coating mechanism 300 is disposed on the upper surface of the workbench 100 and on one side of the discharge mechanism 200;

[0061] The drying mechanism 400 is disposed on the upper surface of the workbench 100 and is disposed on a side of the coating mechanism 300 away from the discharge mechanism 200;

[0062] The winding mechanism 500 is disposed on the upper surface of the workbench 100 and on a side of the drying mechanism 400 away from the coating mechanism 300;

[0063] The drying mechanism 400 includes:

[0064] The drying box 410 is arranged on the upper surface of the workbench 100;

[0065] The first motor 420 is disposed on the top plate of the drying box 410 , and the output shaft of the first motor 420 passes through the top plate of the drying box 410 ;

[0066] The rotating shaft 430 is configured on the output shaft of the first motor 420;

[0067] The fan blade 440 is fixedly disposed on the periphery of the rotating shaft 430;

[0068] The heating wire 450 is disposed inside the drying box 410 and below the fan blades 440;

[0069] The material inlet and outlet ports 460 are provided on the left and right side panels of the drying box 410 and are arranged below the heating wire 450;

[0070] The L-shaped plate 470 is placed horizontally inside the drying box 410, and the top plate of the L-shaped plate 470 is arranged in contact with the three inner walls of the drying box 410, and the side plates of the L-shaped plate 470 extend below the inlet and outlet 460. The top plate of the L-shaped plate 470 is arranged between the heating wire 450 and the inlet and outlet 460;

[0071] The vent 480 is opened on a side of the drying box 410 away from the side plate of the L-shaped plate 470, and the vent 480 is set below the top plate of the L-shaped plate 470.

[0072] In the present technical solution, in order to prevent uneven glue layer when the fabric is dried after being coated with glue, a drying mechanism 400 is provided on the workbench 100. A first motor 420 is fixedly provided on the top plate of the drying box 410 of the drying mechanism 400. The output shaft of the first motor 420 passes through the top plate of the drying box 410 and is fixedly connected to a rotating shaft 430. Fan blades 440 are fixedly provided on the periphery of the rotating shaft 430. The fan blades 440 can be driven to rotate by the first motor 420, thereby accelerating the flow of air inside the drying box 410. An air inlet can be provided on the top of the drying box 410 to ensure the circulation of air inside the drying box 410. Inlet and outlet ports 460 are provided on the left and right side panels of the drying box 410. A heating wire 450 is fixedly provided below the fan blade 440, and an L-shaped The plate 470 and the L-shaped plate 470 are placed upside down inside the drying box 410, and the top plate of the L-shaped plate 470 is fitted with the three inner walls of the drying box 410, and the side plates of the L-shaped plate 470 extend to the bottom of the inlet and outlet 460. In this way, the air blown by the fan blades 440 is heated by the heater and flows to the bottom of the drying box 410 from the ventilation duct formed by the L-shaped plate 470 and the inside of the drying box 410. Because the inlet and outlet 460 is arranged in the middle of the side plate of the L-shaped plate 470, the vent 480 is arranged on the side plate opposite to the side plate of the L-shaped plate 470 inside the drying box 410, and the vent 480 is arranged above the inlet and outlet 460, so that the hot air can pass through the fabric of the inlet and outlet 460 and then be discharged from the heating box through the vent 480, so that the fabric can be dried quickly without affecting the flatness of the colloid on the upper surface of the fabric.

[0073] This embodiment provides a fabric surface coating device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0074] like Figure 1-Figure 4 As shown, in this embodiment, the unloading mechanism 200 includes:

[0075] The first mounting plate 210 is disposed on the front and rear sides of the upper surface of the workbench 100;

[0076] The unwinding roller 220 is disposed between the two first mounting plates 210 .

[0077] In this technical solution, in order to facilitate the loading of fabrics, a discharge mechanism 200 is provided. The first mounting plate 210 of the discharge mechanism 200 is fixedly arranged on the front and rear sides of the upper surface of the workbench 100. A discharge roller 220 is designed between the two first mounting plates 210. The uncoated fabric is put on the discharge roller 220, and the fabric can be discharged by pulling one end of the fabric.

[0078] This embodiment provides a fabric surface coating device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] like Figure 1-Figure 4 As shown, in this embodiment, the coating mechanism 300 includes:

[0080] The second mounting plate 310 is disposed on the front and rear sides of the upper surface of the workbench 100;

[0081] The horizontal plate 320 is disposed between the two second mounting plates 310;

[0082] The glue tank 330 is fixedly disposed above the horizontal plate 320;

[0083] The fixing plate 340 is disposed on one side of the two second mounting plates 310 close to the unloading mechanism 200;

[0084] Branch pipe 350, fixedly disposed between the two fixing plates 340;

[0085] The connecting pipe 360 is disposed between the glue tank 330 and the branch pipe 350;

[0086] The nozzle 370 is disposed below the branch pipe 350;

[0087] The water pump 380 is configured to connect the branch pipe 350 and the connecting pipe 360;

[0088] The scraper mechanism 390 is disposed between the two second mounting plates 310 .

[0089] In the present technical solution, in order to be able to coat the fabric, a coating mechanism 300 is set for this purpose. The second mounting plate 310 of the coating mechanism 300 is fixed to the front and rear sides of the upper surface of the workbench 100. The tops of the two mounting plates are connected with a horizontal plate 320. A glue tank 330 is fixed above the horizontal plate 320. The glue tank 330 can increase the colloid through the feed hole. A fixed plate 340 is fixed on one side of the two second mounting plates 310 close to the discharge mechanism 200. A branch pipe is fixed between the two fixed plates 340. 350, a connecting pipe 360 is fixedly provided between the branch pipe 350 and the glue tank 330, a nozzle 370 is connected to the lower part of the branch pipe 350, and a water pump 380 is fixedly provided at the position where the connecting pipe 360 and the branch pipe 350 are connected. The water pump 380 can pump the glue liquid inside the glue tank 330 into the inside of the branch pipe 350 through the connecting pipe 360, and then spray it onto the surface of the fabric through multiple nozzles 370. The thickness of the glue layer can be controlled by controlling the spraying time. At the same time, multiple nozzles 370 can make the fabric evenly coated.

[0090] This embodiment provides a fabric surface coating device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0091] like Figure 1-Figure 4 As shown, in this embodiment, the winding mechanism 500 includes:

[0092] The third mounting plate 510 is disposed on the front and rear sides of the upper surface of the workbench 100;

[0093] The receiving roller 520 is disposed between the two third mounting plates 510;

[0094] The second motor 530 is disposed on the outside of one of the third mounting plates 510 , and the output shaft of the second motor 530 passes through the side plate and is connected to the receiving roller 520 .

[0095] In the present technical solution, in order to facilitate the winding of the dried coated fabric, a winding mechanism 500 is provided. The third mounting plate 510 of the winding mechanism 500 is fixedly arranged on the front and rear sides of the upper surface of the workbench 100. A discharge roller 220 is provided between the two third mounting plates 510. A second motor 530 is fixedly provided on the outer side of one of the third mounting plates 510. The output shaft of the second motor 530 passes through the third mounting plate 510 and is fixedly connected to one end of the winding roller 520. The winding roller 520 is driven to rotate by the third motor 398, so that the dried coated fabric can be wound up. At the same time, the automatic feeding and feeding speed of the fabric can also be controlled.

[0096] This embodiment provides a fabric surface coating device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0097] like Figure 1-Figure 4 As shown, in this embodiment, the scraping mechanism 390 includes:

[0098] The screw 391 is disposed between the two second mounting plates 310;

[0099] The guide rod 392 is fixedly disposed between the two second mounting plates 310;

[0100] The sliding block 393 is mounted on the screw rod 391 and the guide rod 392;

[0101] A through slot 394 is provided on the sliding block 393 between the guide rod 392 and the screw rod 391;

[0102] Screw 395, disposed inside the through slot 394;

[0103] Connecting plate 396, fixedly configured below screw 395;

[0104] Scraper 397, disposed below connecting plate 396;

[0105] The third motor 398 is disposed on the outside of one of the second mounting plates 310 , and the output shaft of the third motor 398 passes through the second mounting plate 310 and is fixedly connected to one end of the screw rod 391 .

[0106] The through slot 394 is provided with an internal thread, which engages with the external thread of the screw 395 .

[0107] In this technical solution, in order to control the thickness of the colloid after coating the fabric, a scraping mechanism 390 is set up. A guide rod 392 is fixedly set between the two second mounting plates 310. At the same time, a screw 391 is set between the two second mounting plates 310. A sliding block 393 is set on the screw 391 and the guide rod 392. A vertical through groove 394 is opened on the sliding block 393 between the guide rod 392 and the screw 391. The interior of the through groove 394 is provided with an internal thread. A screw 395 is designed inside the through groove 394. The external thread of the screw 395 is aligned with the internal thread. The screw 395 is engaged and the position of the screw 395 inside the through groove 394 can be changed through the thread. A connecting plate 396 is fixedly provided below the screw 395, and a scraper 397 is fixedly provided below the connecting plate 396. The screw 391 is driven to rotate by the motor, so that the sliding block 393 can change its position along the guide rod 392, so that the scraper 397 can level the glue layer on the surface of the fabric. At the same time, the height of the connecting plate 396 and the scraper 397 is changed by the screw 395, so that the distance between the scraper 397 and the fabric can be changed, so that the thickness of the glue layer on the surface of the fabric can be controlled.

[0108] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A fabric surface coating device, characterized in that: include: Workbench (100); a material discharge mechanism (200) disposed on the upper surface of the workbench (100); A coating mechanism (300) is disposed on the upper surface of the workbench (100) and on one side of the discharge mechanism (200); a drying mechanism (400), arranged on the upper surface of the workbench (100), and arranged on a side of the coating mechanism (300) away from the discharge mechanism (200); a winding mechanism (500) disposed on the upper surface of the workbench (100) and on a side of the drying mechanism (400) away from the coating mechanism (300); Wherein, the drying mechanism (400) comprises: A drying box (410), disposed on the upper surface of the workbench (100); A first motor (420) is disposed on the top plate of the drying box (410), and an output shaft of the first motor (420) passes through the top plate of the drying box (410); A rotating shaft (430) is arranged on the output shaft of the first motor (420); Fan blades (440) are fixedly arranged on the periphery of the rotating shaft (430); The heating wire (450) is disposed inside the drying box (410) and below the fan blade (440); An inlet and outlet port (460) is provided on the left and right side panels of the drying box (410), and the inlet and outlet port (460) is provided below the heating wire (450); An L-shaped plate (470) is horizontally placed inside the drying box (410), and a top plate of the L-shaped plate (470) is arranged in contact with three inner walls of the drying box (410), and a side plate of the L-shaped plate (470) extends below the inlet and outlet (460), and a top plate of the L-shaped plate (470) is arranged between the heating wire (450) and the inlet and outlet (460); The vent (480) is opened on a side of the drying box (410) away from the side plate of the L-shaped plate (470), and the vent (480) is arranged below the top plate of the L-shaped plate (470).

2. The fabric surface coating device according to claim 1, characterized in that: The discharge mechanism (200) comprises: A first mounting plate (210) is arranged on the front and rear sides of the upper surface of the workbench (100); The unloading roller (220) is arranged between the two first mounting plates (210).

3. The fabric surface coating device according to claim 1, characterized in that: The coating mechanism (300) comprises: A second mounting plate (310) is arranged on the front and rear sides of the upper surface of the workbench (100); A horizontal plate (320) is arranged between the two second mounting plates (310); A glue tank (330) is fixedly disposed above the horizontal plate (320); A fixed plate (340) is arranged on one side of the two second mounting plates (310) close to the discharge mechanism (200); A branch pipe (350) fixedly disposed between the two fixing plates (340); A connecting pipe (360) is disposed between the glue tank (330) and the branch pipe (350); A nozzle (370) is disposed below the branch pipe (350); a water pump (380), disposed at a position where the branch pipe (350) and the connecting pipe (360) are connected; The scraping mechanism (390) is arranged between the two second mounting plates (310).

4. The fabric surface coating device according to claim 1, characterized in that: The winding mechanism (500) comprises: a third mounting plate (510) disposed on the front and rear sides of the upper surface of the workbench (100); a receiving roller (520), disposed between the two third mounting plates (510); The second motor (530) is configured on the outside of one of the third mounting plates (510), and the output shaft of the second motor (530) passes through the side plate and is connected to the receiving roller (520).

5. The fabric surface coating device according to claim 3, characterized in that: The scraping mechanism (390) comprises: a screw (391), disposed between the two second mounting plates (310); A guide rod (392) fixedly disposed between the two second mounting plates (310); A sliding block (393) is mounted on the screw rod (391) and the guide rod (392); A through groove (394) is provided on the sliding block (393) between the guide rod (392) and the screw rod (391); A screw (395) is disposed inside the through slot (394); A connecting plate (396) fixedly configured below the screw (395); A scraper (397) is disposed below the connecting plate (396); a third motor (398) disposed on the outside of one of the second mounting plates (310), and an output shaft of the third motor (398) passing through the second mounting plate (310) and fixedly connected to one end of the screw rod (391); The through slot (394) is provided with an internal thread inside, and the internal thread is engaged with the external thread of the screw (395).

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