A spraying device for metal wire processing

Abstract

The present invention discloses a spraying device for metal wire processing, which relates to the field of metal processing technology, including a frame, a clamping mechanism, a spraying mechanism and an auxiliary mechanism; the clamping mechanism includes a guide plate, a lifting platform, a rotating assembly and a clamping assembly, wherein the rotating assembly is installed on the lifting platform and the driving part passes through the guide plate, the clamping assembly is fixed on the driving end of the rotating assembly, the clamping assembly includes a fixed plate and a fixed box, a plurality of partition plates are arranged at intervals in the fixed box, a flexible cover is arranged between adjacent partition plates, the lower end of the flexible cover is connected to the bottom of the fixed box, the upper end of the flexible cover is connected to a pressing plate, a filler is arranged in the flexible cover and a fixed cotton block is penetrated. The present invention staggers the metal wires while fixing them, thereby avoiding the situation that the metal wires block each other during the spraying process, resulting in incomplete spraying.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, in particular to a spraying device for metal wire processing. Background Art

[0002] The surface treatment of metal wire is a key step to ensure its performance and appearance. It mainly includes: cleaning, using water washing, solvent washing or steam washing to remove oil, dust and other impurities on the surface of the metal wire; degreasing, removing grease on the surface by alkaline degreasing, acid degreasing or solvent degreasing; pickling, using hydrochloric acid, sulfuric acid or nitric acid and other pickling solutions to remove oxide scale and rust; neutralization, using neutralizers such as sodium hydroxide or sodium carbonate to remove acidic substances on the surface; rinsing, using water rinsing or alkaline rinsing to remove residual substances; coating treatment, coating a protective film on the surface of the metal wire, such as epoxy resin, polyurethane, polyethylene, etc.

[0003] Among them, wire coating treatment is an important surface treatment technology, which can improve the corrosion resistance, wear resistance and aesthetics of the wire. The process flow is roughly as follows: surface pretreatment, which is the first step in coating treatment, the purpose is to ensure good bonding between the coating and the wire substrate. It usually includes degreasing, rust removal, cleaning and other steps. Surface roughening, increase the roughness of the wire surface by sandblasting, electrochemical roughening and other methods to improve the bonding between the coating and the substrate. Chemical conversion treatment, a conversion film is formed on the surface of the wire by chemical methods to improve its corrosion resistance and wear resistance. Electroplating, a layer of metal or alloy is deposited on the surface of the wire by electrolysis to improve its corrosion resistance and decorativeness. Thermal spraying, using a heat source (such as flame, electric arc) to heat the coating material to a molten or semi-molten state, and then spray it onto the surface of the wire to form a coating.

[0004] For metal wire, because the workpiece is slender in shape, it is difficult for ordinary sprayers to spray it completely in place during the thermal spraying process. If the metal wire is passed through the hot-melt material, the material wrapping layer will be too thick. At the same time, the shrinkage stress of the high-thick hot-melt material during cooling and the thermal stress generated during the spraying process will cause the metal wire to bend and deform. Summary of the invention

[0005] The object of the present invention is to provide a spraying device for metal wire processing to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a spraying device for metal wire processing, comprising a frame, a clamping mechanism, a spraying mechanism and an auxiliary mechanism, wherein the clamping mechanism is installed on the frame for fixing the metal wire and adjusting the position of the metal wire, the spraying mechanism is mounted on the upper side of the clamping mechanism for spraying the surface of the metal wire, and the auxiliary mechanism is arranged in conjunction with the metal wire for auxiliary cooling and waste recovery.

[0007] According to the above technical solution, the clamping mechanism includes a guide plate, a lifting platform, a rotating assembly and a clamping assembly, wherein the rotating assembly is installed on the lifting platform and the driving part passes through the guide plate, the clamping assembly is fixed to the driving end of the rotating assembly, the clamping assembly includes a fixed plate and a fixed box, the fixed box is a hollow structure with an opening on the upper side and one end is fixedly connected to the fixed plate, a plurality of partition plates are arranged at intervals in the fixed box, a flexible cover is arranged between adjacent partition plates, the lower end of the flexible cover is connected to the bottom of the fixed box, the upper end of the flexible cover is connected to a pressure plate, a filler is arranged in the flexible cover and a fixed cotton block is passed through.

[0008] According to the above technical solution, the amount of filler in the flexible cover is different and decreases from the inside to the outside.

[0009] According to the above technical solution, a number of ducts are arranged in the fixed plate, the number of the ducts is consistent with the number of flexible covers and one end of the ducts is respectively inserted into the corresponding flexible covers, the other end of the ducts is connected to an air box, the air box is connected to an air pump, and a visual detection module is arranged on the inner wall of the fixed box.

[0010] According to the above technical solution, a pressure chamber is provided on the catheter to detect the internal pressure of each catheter.

[0011] According to the above technical solution, the rotating assembly adopts a motor shaft linkage structure, wherein the shaft is connected to the fixed plate.

[0012] According to the above technical solution, the spraying mechanism includes a two-axis driving module and a spraying module, wherein the spraying module is connected to the driving end of the two-axis driving module, and the two-axis driving module is used to control the movement of the spraying module in the X-axis and Y-axis directions.

[0013] According to the above technical solution, the auxiliary mechanism includes a recovery component and a cooling component, wherein the recovery component is arranged at the lower side of the clamping component, and the cooling component is arranged in conjunction with the clamping component.

[0014] According to the above technical scheme, the recovery component includes cylinder one, a material receiving plate, a material dividing plate, cylinder two, an air suction device and a recovery device, wherein the cylinder one is fixed on the lower side of the fixed plate, the material receiving plate is connected to the driving end of the cylinder one, an inclined guide groove is provided on the material receiving plate, a discharge port is provided on the material receiving plate relative to the lower end of the guide groove, the material dividing plate is arranged in contact with the discharge port, an outlet one and an outlet two are provided on the material dividing plate, the cylinder two is fixed to the bottom of the material receiving plate and the driving end is connected to the material dividing plate, the inlet of the air suction device is connected to the outlet one, and the outlet of the air suction device is connected to the recovery device.

[0015] According to the above technical solution, the cooling component includes a water tank, a filter, a water pipe and a spray head, wherein the filter inlet is connected to the water tank, the filter outlet is connected to the water pipe, and the spray head is arranged at the water outlet end of the water pipe.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, by providing a clamping assembly, can fix the metal wires while staggering the metal wires through different degrees of contraction of the flexible cover, thereby avoiding the situation in which the metal wires block each other during the spraying process and cause incomplete spraying; by providing an auxiliary mechanism, the recovery assembly can collect the waste generated during the spraying process, and the cooling assembly can assist in the cooling of the metal wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a partial schematic diagram of the present invention;

[0020] Figure 3 is a schematic diagram of the clamping mechanism of the present invention;

[0021] Figure 4 is a partial schematic diagram of the clamping assembly of the present invention;

[0022] Figure 5 It is a schematic diagram of a fixed box of the present invention;

[0023] Figure 6 It is a partial schematic diagram of the fixed box of the present invention;

[0024] Figure 7 is a partial cross-sectional view of a material receiving plate of the present invention;

[0025] Figure 8 is a partial schematic diagram of the recycling assembly of the present invention;

[0026] Fig. 9 is a schematic diagram of the spraying mechanism of the present invention;

[0027] Fig.10 is a schematic diagram of the auxiliary mechanism of the present invention;

[0028] In the figure: 1, frame; 2, clamping mechanism; 21, guide plate; 22, lifting platform; 221, protective box; 222, screw; 223, motor 1; 23, rotating assembly; 24, clamping assembly; 241, fixed plate; 2411, air box; 2412, air pump; 242, fixed box; 2421, stopper; 243, partition plate; 244, flexible cover; 245, pressure plate; 246, fixed cotton block; 247, catheter; 2471 , pressure chamber; 248, visual inspection module; 25, pressure plate assembly; 3, spraying mechanism; 31, two-axis drive module; 32, spraying module; 41, cylinder one; 42, receiving plate; 421, guide groove; 422, discharge port; 43, dividing plate; 431, outlet one; 432, outlet two; 44, cylinder two; 45, exhaust device; 46, recovery device; 51, water tank; 52, filter; 53, water pipe; 54, sprinkler head. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-10 The present invention provides a technical solution: a spraying device for metal wire processing, comprising a frame 1, a clamping mechanism 2, a spraying mechanism 3 and an auxiliary mechanism, wherein the clamping mechanism 2 is mounted on the frame 1, and is used to fix the metal wire and adjust the position of the metal wire, the spraying mechanism 3 is mounted on the upper side of the clamping mechanism 2, and is used for spraying the surface of the metal wire, and the auxiliary mechanism is arranged in conjunction with the metal wire, and is used for auxiliary cooling and waste recovery;

[0031] The clamping mechanism 2 includes a guide plate 21, a lifting platform 22, a rotating component 23 and a clamping component 24, wherein the rotating component 23 is installed on the lifting platform 22 and the driving part passes through the guide plate 21, the clamping component 24 is fixed to the driving end of the rotating component 23, the clamping component 24 includes a fixed plate 241 and a fixed box 242, the fixed box 242 is a hollow structure with an upper opening and one end is fixedly connected to the fixed plate 241, a plurality of partition plates 243 are arranged at intervals in the fixed box 242, a flexible cover 244 is arranged between adjacent partition plates 243, the lower end of the flexible cover 244 is connected to the bottom of the fixed box 242, the upper end of the flexible cover 244 is connected to a pressing plate 245, a filler is arranged in the flexible cover 244 and a fixed cotton block 246 is penetrated by it.

[0032] The supplementary explanation based on the above structure is as follows: the fixed cotton block 246 is not directly connected to the inside of the flexible cover 244, the surface of the fixed cotton block 246 is wrapped by the flexible cover 244, and the two are nested. The fixed cotton block 246 can be replaced, and the fixed cotton block 246 is used to insert the metal wire. The flexible cover 244 is made of an airtight and good plastic material; further, the outer cover of the lifting platform 22 is provided with a protective box 221, and a screw 222 is rotatably arranged in the protective box 221. One end of the screw 222 is connected to a motor 223, and the screw 222 is threadedly matched with the lifting platform 22. In actual operation, the lifting platform 22 is driven to rise and fall in the protective box 221 by the rotation of the screw 222.

[0033] The amount of filler in the flexible cover 244 is different and decreases from the inside to the outside.

[0034] A number of conduits 247 are arranged in the fixed plate 241. The number of the conduits 247 is consistent with the number of the flexible covers 244 and one end of the conduits 247 is respectively inserted into the corresponding flexible covers 244. The other end of the conduits 247 is connected to an air box 2411, and the air box 2411 is connected to an air pump 2412. A visual inspection module 248 is arranged on the inner wall of the fixed box 242.

[0035] It should be noted that: preferably, a pressure chamber 2471 is provided on the conduit 247 for detecting the internal pressure of each conduit 247. The filler in the flexible cover 244 may be particles of a certain size. If materials such as cotton wool are used, a filter needs to be provided at the entrance of the conduit 247 to avoid inhalation of the filler. Furthermore, the visual detection module 248 is used to detect the height of each pressure plate 245, that is, the partition plate 243 does not completely isolate the flexible cover 244 when it is provided, leaving a position for the visual detection module 248 to detect. A block 2421 is provided on the upper side of the fixed box 242 for limiting the upward movement distance of the pressure plate 245.

[0036] In actual operation, the air in each flexible cover 244 is extracted through the air pump 2412, causing the flexible cover 244 to shrink. The degree of shrinkage varies depending on the amount of filling material. Because the lower end of the flexible cover 244 is fixed, the upper end will pull the corresponding pressure plate 245 downward. Finally, the height of the pressure plate 245 decreases from the inside to the outside, which can be detected by the visual detection module 248. Furthermore, the height of the fixed cotton block 246 will also change with the shrinkage of the flexible cover 244, so that the inserted metal wires can be staggered with each other, which is convenient for lateral spraying. At the same time, the shrinkage process of the flexible cover 244 will squeeze the fixed cotton block 246, thereby helping to better grasp the metal wire to avoid falling.

[0037] like Figure 3As shown, the rotating component 23 preferably adopts a motor shaft linkage structure, wherein the shaft is connected to the fixed plate 241. In one embodiment, in order to improve the processing efficiency, two or more groups of shafts can be set in the form of pulley connections. The motor drives the shafts to rotate synchronously, and the fixed plates 241 can be rotated to rotate and adjust the orientation of the metal wire for uniform spraying.

[0038] In one embodiment, preferably, in order to improve stability, a pressure plate assembly 25 is provided on the guide plate 21, and a cylinder pressure plate connection structure is adopted to press the guide plate 21 to limit its shaking.

[0039] like Fig. 9 As shown, the spraying mechanism 3 includes a two-axis driving module 31 and a spraying module 32, wherein the spraying module 32 is connected to the driving end of the two-axis driving module 31, and the two-axis driving module 31 is used to control the movement of the spraying module 32 in the X-axis and Y-axis directions. In actual operation, the spraying module 32 is configured to match the number of the clamping components 24 to set the spraying head. Preferably, the spraying position of each spraying head is fine-tuned by the structure connected by the motor screw. The spraying head can be hinged on the screw and the spraying angle can be adjusted with a suitable driving member. Further, a visual module can be provided on the spraying head to monitor the spraying process.

[0040] like Fig.10 As shown, the auxiliary mechanism includes a recovery component and a cooling component, wherein the recovery component is arranged on the lower side of the clamping component 24, and the cooling component is arranged in conjunction with the clamping component 24.

[0041] The recovery component includes a cylinder 41, a receiving plate 42, a dividing plate 43, a cylinder 44, an exhaust device 45 and a recovery device 46, wherein the cylinder 41 is fixed on the lower side of the fixed plate 241, the receiving plate 42 is connected to the driving end of the cylinder 41, an inclined guide groove 421 is provided on the receiving plate 42, a discharge port 422 is provided at the lower end of the receiving plate 42 relative to the guide groove 421, the dividing plate 43 is arranged to fit the discharge port 422, an outlet 1 431 and an outlet 2 432 are provided on the dividing plate 43, the cylinder 44 is fixed at the bottom of the receiving plate 42 and the driving end is connected to the dividing plate 43, the inlet of the exhaust device 45 is connected to the outlet 1 431, and the outlet of the exhaust device 45 is connected to the recovery device 46.

[0042] In actual operation, the vacuum device 45 adopts an air pump, the recovery device 46 adopts a filter element recovery device, and the cylinder 1 41 is used to adjust the position of the receiving plate 42. When spraying, the receiving plate 42 will catch the spraying waste. The cylinder 2 44 pushes the dividing plate 43 so that the outlet 1 431 is aligned with the discharge port 422. The vacuum device 45 extracts the waste to the recovery device 46 for recycling and processing.

[0043] The cooling assembly includes a water tank 51 , a filter 52 , a water pipe 53 and a spray head 54 , wherein the inlet of the filter 52 is connected to the water tank 51 , the outlet of the filter 52 is connected to the water pipe 53 , and the spray head 54 is arranged at the water outlet end of the water pipe 53 .

[0044] It should be noted that: in order to save space, the recovery device 46 can be installed in the water tank 51, and an outer cover is provided for protection and isolation. The water tank 51 is used to store cooling water, preferably an external cooling system, the filter 52 is used to filter the cooling water, and the outlet of the spray head 54 is toward the clamping assembly 24, which is used for cooling treatment of the metal wire after spraying. During the cooling process, the cylinder 44 pushes the dividing plate 43 so that the outlet 432 is aligned with the discharge port 422. The cooling water falling on the receiving plate 42 will flow back to the water tank 51 through the outlet 432, and can also be used to clean the surface of the receiving plate 42.

[0045] The specific implementation methods are as follows:

[0046] Step 1: Fixing. The staff inserts the metal wire into the fixed cotton block 246. The air pump 2412 extracts the gas in each flexible cover 244. The flexible cover 244 shrinks in a step-like manner to tighten and stagger the fixed cotton block 246.

[0047] Step 2: Position adjustment: the rotating assembly 23 adjusts the clamping assembly 24 to a suitable spraying position, and the recovery assembly is adjusted to the lower side of the clamping assembly 24;

[0048] Step 3: spraying, the spraying mechanism 3 sprays the lower surface of the metal wire, during which the rotating component 23 controls the rotation of the clamping component 24 and the spraying angle of the spray head is self-adjusted to spray all aspects of the metal wire;

[0049] Step 4: Recycling: The recycling component recycles the waste generated by spraying;

[0050] Step 5: Cooling: The cooling assembly cools the metal wire.

[0051] Specifically, in step one, the contraction state of the flexible cover 244 is determined by the visual detection module 248. When each flexible cover 244 is contracted into place, the visual detection module 248 should be able to detect different distance signals corresponding to the number of flexible covers 244, and the metal wires on the surface have been staggered; further, combined with the pressure signal detected by the pressure chamber 2471, the state of the catheter 247 can be checked. If the catheter 247 is blocked, the corresponding pressure chamber 2471 detects a critical pressure signal, and the visual detection module 248 detects an abnormal distance signal. If the inner flexible cover 244 is blocked, the flexible cover 244 stops contracting, and the corresponding distance signal detected by the visual detection module 248 does not change much. If the middle or outer flexible cover 244 is blocked, the flexible cover 244 with a too small contraction amplitude will block the inner flexible cover 244, and the number of distance signals detected by the visual detection module 248 will decrease.

[0052] In step three, the spraying state of the metal wire can be controlled and adjusted in combination with the visual module configured on the spray head. In the initial state, the metal wires are staggered and placed in parallel, and the visual module records the distance data and the surface state. After the upper side is sprayed, the visual module records the distance data and the surface state again. According to the difference in the distance signal of each metal wire reaching each position before and after spraying, it is judged whether the thickness of the spray layer meets the standard, and the spraying quality is judged according to the surface state after spraying; after the upper side of the metal wire is sprayed, the clamping component 24 is lifted up to close the distance between the metal wire and the spraying module 32, and the spraying module 32 adjusts the position and angle of the spray head to spray the two sides of the metal wire; finally, the rotating component 23 drives the metal wire to deflect, and the spraying module 32 adjusts the position and angle of the spray head to spray the lower side of the metal wire.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spraying device for metal wire processing, comprising a frame (1), a clamping mechanism (2), a spraying mechanism (3) and an auxiliary mechanism, characterized in that: The clamping mechanism (2) is mounted on the frame (1) and is used to fix the metal wire and adjust the position of the metal wire. The spraying mechanism (3) is mounted on the upper side of the clamping mechanism (2) and is used to spray the surface of the metal wire. The auxiliary mechanism is arranged in conjunction with the metal wire and is used to assist cooling and waste recovery. The clamping mechanism (2) comprises a guide plate (21), a lifting platform (22), a rotating component (23) and a clamping component (24), wherein the rotating component (23) is mounted on the lifting platform (22) and a driving part passes through the guide plate (21), the clamping component (24) is fixed to the driving end of the rotating component (23), the clamping component (24) comprises a fixed plate (241) and a fixed box (242), the fixed box (242) is a hollow structure with an upper opening and one end is fixedly connected to the fixed plate (241), a plurality of partition plates (243) are arranged at intervals in the fixed box (242), a flexible cover (244) is arranged between adjacent partition plates (243), the lower end of the flexible cover (244) is connected to the bottom of the fixed box (242), the upper end of the flexible cover (244) is connected to a pressing plate (245), a filler is arranged in the flexible cover (244) and a fixed cotton block (246) is passed through; The amount of filler in the flexible cover (244) is different and decreases from the inside to the outside.

2. A spraying device for metal wire processing according to claim 1, characterized in that: A plurality of conduits (247) are arranged in the fixed plate (241), the number of the conduits (247) being the same as the number of the flexible covers (244), and one end of the conduits is respectively inserted into the corresponding flexible covers (244), the other end of the conduits (247) is connected to an air box (2411), the air box (2411) is connected to an air pump (2412), and a visual detection module (248) is arranged on the inner wall of the fixed box (242).

3. A spraying device for metal wire processing according to claim 2, characterized in that: The conduits (247) are provided with pressure chambers (2471) for detecting the internal pressure of each conduit (247).

4. A spraying device for metal wire processing according to claim 3, characterized in that: The rotating assembly (23) adopts a motor shaft linkage structure, wherein the shaft is connected to the fixing plate (241).

5. A spraying device for metal wire processing according to claim 4, characterized in that: The spraying mechanism (3) comprises a two-axis driving module (31) and a spraying module (32), wherein the spraying module (32) is connected to the driving end of the two-axis driving module (31), and the two-axis driving module (31) is used to control the movement of the spraying module (32) in two directions of the X axis and the Y axis.

6. A spraying device for metal wire processing according to claim 5, characterized in that: The auxiliary mechanism comprises a recovery component and a cooling component, wherein the recovery component is arranged on the lower side of the clamping component (24), and the cooling component is arranged in cooperation with the clamping component (24).

7. A spraying device for metal wire processing according to claim 6, characterized in that: The recovery assembly comprises a cylinder 1 (41), a material receiving plate (42), a material dividing plate (43), a cylinder 2 (44), an air extraction device (45) and a recovery device (46), wherein the cylinder 1 (41) is fixed to the lower side of the fixing plate (241), the material receiving plate (42) is connected to the driving end of the cylinder 1 (41), an inclined guide groove (421) is formed on the material receiving plate (42), and the material receiving plate (42) is inclined relative to the guide groove (421). A discharge port (422) is provided at the lower end, the material dividing plate (43) is arranged in close contact with the discharge port (422), an outlet 1 (431) and an outlet 2 (432) are provided on the material dividing plate (43), the air cylinder 2 (44) is fixed to the bottom of the material receiving plate (42) and the driving end is connected to the material dividing plate (43), the inlet of the air extraction device (45) is connected to the outlet 1 (431), and the outlet of the air extraction device (45) is connected to the recovery device (46).

8. A spraying device for metal wire processing according to claim 7, characterized in that: The cooling component comprises a water tank (51), a filter (52), a water pipe (53) and a spray head (54), wherein the inlet of the filter (52) is connected to the water tank (51), the outlet of the filter (52) is connected to the water pipe (53), and the spray head (54) is arranged at the water outlet end of the water pipe (53).

9. A spraying device for metal wire processing according to claim 8, characterized in that: Here’s how to use it: Step 1: Fixing, the staff inserts the metal wire into the fixing cotton block (246), and the air pump (2412) extracts the gas in each flexible cover (244), and the flexible cover (244) shrinks in a step-by-step manner, tightening and staggering the fixing cotton block (246); Step 2: Position adjustment: the rotating assembly (23) adjusts the clamping assembly (24) to a suitable spraying position, and the recovery assembly is adjusted to the lower side of the clamping assembly (24); Step 3: spraying, the spraying mechanism (3) sprays the lower surface of the metal wire, during which the rotation of the clamping component (24) is controlled by the rotating component (23), and the spraying angle of the spraying head is self-adjusted to spray all sides of the metal wire; Step 4: Recycling: The recycling component recycles the waste generated by spraying; Step 5: Cooling: The cooling assembly cools the metal wire.

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