High-efficiency cooling and shaping device and method for cable

Abstract

The invention relates to the technical field of cable production, in particular to an efficient cooling and shaping device and method for a cable. The efficient cooling and shaping device comprises a box body, a refrigerating machine, a plurality of cooling water spraying frames and a cable traction mechanism, and the cable traction mechanism comprises a moving track, a driving component, a sliding seat, a moving frame, a plurality of first clamping assemblies, a fixed frame and a plurality of second clamping assemblies. Firstly, a plurality of cables extruded by a high-temperature plastic extruding machine are sequentially placed in a plurality of first cable clamping holes, after the ends of the cables extend to the outer portions of the first cable clamping holes, the cables are clamped and fixed through a first clamping assembly, then a driving component is started to drive a sliding seat to slide on a moving rail, and the cables are clamped and fixed through a second clamping assembly. By means of the structure, the movable frame moves towards the fixed frame, cold water is sprayed to the surfaces of the multiple cables through the multiple cooling water spraying frames in the moving process, cooling and shaping of the multiple cables are completed, cooling and shaping can be conducted on the multiple cables at the same time, and applicability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of cable production, and particularly relates to an efficient cable cooling and shaping device and method. Background Art

[0002] During the cable processing, including core manufacturing and sheath production, in the production process, generally the core and the sheath are formed together through a high-temperature extrusion machine. Therefore, after extrusion, it is necessary to carry out a certain degree of cooling. The existing method is usually to pass the extruded cable through a cooling water tank to achieve the cooling effect. Due to the long-term production of cables, the temperature of the cooling water in the cooling water tank will gradually increase, and its cooling effect will become worse and worse, unable to meet the requirements of normal production.

[0003] To solve the above problems, a cable cooling and shaping device is disclosed in the patent document with the publication number CN214820759U. The cooling and shaping device includes: a box body; a cooling component provided on the box body for cooling and shaping the cable; a heat dissipation component provided on the box body for dissipating heat from the cooling water. The cooling component includes: a circulating water cooling component; an ice-cold component provided on the circulating water cooling component for quickly refrigerating the water flow to improve the cable cooling and shaping rate and effect. The cable to be cooled and shaped is placed in the circulating water cooling component and the cooling water circulates. At the same time, the ice-cold component is used to quickly cool down the water flow flowing into the circulating water cooling component. Under the action of the flowing low-temperature water, the cable to be cooled and shaped is quickly and efficiently cooled and shaped, and the water returned to the box body is dissipated heat under the action of the heat dissipation component to keep its temperature in a lower state to ensure the cooling effect on the cable during subsequent use.

[0004] However, in the actual use process of the existing cable cooling and shaping device, it can only perform water cooling shaping on a single cable. When a high-temperature extrusion machine can extrude multiple cables at the same time, it cannot cool and shape multiple cables simultaneously, and its applicability is poor. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient cable cooling and shaping device and method, aiming to solve the technical problem that in the actual use process of the existing cable cooling and shaping device, it can only perform water cooling shaping on a single cable. When a high-temperature extrusion machine can extrude multiple cables at the same time, it cannot cool and shape multiple cables simultaneously, and its applicability is poor.

[0006] To achieve the above purpose, the present invention provides an efficient cable cooling and shaping device, including a box body, a refrigerator, a plurality of cooling water spraying frames and a cable traction mechanism. The refrigerator is arranged at the inner bottom of the box body, and the refrigerator is used to refrigerate the water in the box body. A plurality of the cooling water spraying frames are arranged on both sides inside the box body;

[0007] The cable traction mechanism includes a moving track, a driving component, a sliding seat, a moving frame, a plurality of first clamping components, a fixed frame and a plurality of second clamping components. The moving track is installed in the middle of the top end of the box body. The driving component is arranged inside the moving track. The sliding seat is slidably arranged on the moving track. The output end of the driving component is connected to the sliding seat. A plurality of first cable clamping holes are arranged on the sliding seat. Each first cable clamping hole is provided with a first clamping component. One end of the top of the box body is fixedly provided with the fixed frame. A plurality of second cable clamping holes are arranged on the fixed frame. Each second cable clamping hole corresponds to a first cable clamping hole respectively. Each second cable clamping hole is provided with a first clamping component.

[0008] Among them, the driving component includes a servo motor, a threaded rod and a ball screw nut pair. The servo motor is installed inside the moving track. The output end of the servo motor is provided with the threaded rod. The ball screw nut pair is arranged on the threaded rod. The ball screw nut pair is connected to the sliding seat.

[0009] Among them, both the moving frame and the fixed frame include a bracket body, a plurality of connecting rods and a plurality of mounting rings. The bracket body is installed on the corresponding sliding seat and the box body. A plurality of the connecting rods are arranged at the top end of the bracket body. Each connecting rod is provided with a mounting ring at the end far away from the bracket body. The corresponding first cable clamping hole and the second cable clamping hole are arranged on the mounting ring.

[0010] Among them, each first clamping component and each second clamping component include a mounting frame, an electric cylinder and a clamping arc plate. The mounting frame is installed on the outer side wall of the corresponding mounting ring. The electric cylinder is installed on the mounting frame. The output end of the electric cylinder is provided with the clamping arc plate. The clamping arc plate is located inside the corresponding first cable clamping hole and the second cable clamping hole.

[0011] Among them, the cable high-efficiency cooling and shaping device further includes a protection plate. A through groove is penetrated through the sliding seat. The protection plate is arranged on the end face of the moving track. The protection plate penetrates through the through groove.

[0012] Among them, the cross section of the through groove is arranged in a triangular structure. The protection plate is in clearance fit with the through groove. Fixed blocks are arranged on the side surfaces at both ends of the protection plate. The fixed blocks are detachably connected to the side surface of the moving track.

[0013] The present invention also provides a method for high-efficiency cooling and shaping of cables, which is applied to the cable high-efficiency cooling and shaping device as described above, and includes the following steps:

[0014] Place multiple cables extruded by a high-temperature extrusion machine into the multiple first cable clamping holes in sequence. After the ends of the cables extend outside the first cable clamping holes, use the first clamping assembly to clamp and fix the multiple cables.

[0015] Start the driving component to drive the sliding seat to slide on the moving track, so that the moving frame moves towards the fixed frame. During the movement, use the multiple cooling water spraying frames to spray cold water on the surfaces of the multiple cables to complete the cooling and shaping of the multiple cables.

[0016] When the ends of the multiple cables move to the corresponding second cable clamping holes, start the second clamping assembly to clamp the ends of the cables. The first clamping assembly resets, and the driving component drives the sliding seat to reset.

[0017] After the sliding seat resets, the first clamping assembly clamps and fixes the cables. The second clamping assembly resets and no longer fixes the cables. Through the movement of the driving assembly, the repeated feeding process of the multiple cables is completed.

[0018] An efficient cable cooling and shaping device and method of the present invention include a box body, a refrigerating machine, multiple cooling water spraying frames, and a cable traction mechanism. The cable traction mechanism includes a moving track, a driving component, a sliding seat, a moving frame, multiple first clamping assemblies, a fixed frame, and multiple second clamping assemblies. First, place multiple cables extruded by a high-temperature extrusion machine into the multiple first cable clamping holes in sequence. After the ends of the cables extend outside the first cable clamping holes, use the first clamping assembly to clamp and fix the multiple cables. Then start the driving component to drive the sliding seat to slide on the moving track, so that the moving frame moves towards the fixed frame. During the movement, use the multiple cooling water spraying frames to spray cold water on the surfaces of the multiple cables to complete the cooling and shaping of the multiple cables. And when the ends of the multiple cables move to the corresponding second cable clamping holes, start the second clamping assembly to clamp the ends of the cables. The first clamping assembly resets, and the driving component drives the sliding seat to reset. After the sliding seat resets, the first clamping assembly clamps and fixes the cables. The second clamping assembly resets and no longer fixes the cables. Through the movement of the driving assembly, the repeated feeding process of the multiple cables is completed. With the above structure, the cooling and shaping of multiple cables can be carried out simultaneously, and the applicability is stronger. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of an efficient cable cooling and shaping device according to the first embodiment of the present invention.

[0021] Figure 2 It is provided by the present invention Figure 1 An enlarged partial structural view of part A.

[0022] Figure 3 It is a partial schematic structural diagram of a cable traction mechanism in the first embodiment of the present invention.

[0023] Figure 4 It is a schematic bottom structural view of a sliding seat in the first embodiment of the present invention.

[0024] Figure 5 It is a partial schematic structural diagram of a cable traction mechanism in the second embodiment of the present invention.

[0025] Figure 6 It is provided by the present invention Figure 5 An enlarged partial structural view of part B.

[0026] Figure 7 It is provided by the present invention Figure 5 An enlarged partial structural view of part C.

[0027] Figure 8 It is a step flowchart of an efficient cable cooling and shaping method provided by the present invention.

[0028] 101 - Box body, 102 - Refrigerator, 103 - Cooling water spraying frame, 104 - Moving track, 105 - Sliding seat, 106 - Servo motor, 107 - Threaded rod, 108 - Ball screw nut pair, 109 - Bracket body, 110 - Link rod, 111 - Installation ring, 112 - Installation frame, 113 - Electric cylinder, 114 - Clamping arc plate, 115 - First cable clamping hole, 116 - Second cable clamping hole, 117 - Ball, 201 - Protection plate, 202 - Through groove, 203 - Fixed block. Detailed implementation manners

[0029] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] First Embodiment:

[0031] Please refer to Figures 1 to 4 , where Figure 1 is a schematic structural diagram of a cable high-efficiency cooling and shaping device according to the first embodiment, Figure 2 is Figure 1 an enlarged partial structural view of part A of Figure 3 is a partial schematic structural diagram of a cable traction mechanism in the first embodiment, Figure 4 is a schematic bottom structure diagram of a sliding seat in the first embodiment.

[0032] The present invention provides a cable high-efficiency cooling and shaping device: including a box body 101, a refrigerator 102, a plurality of cooling water spraying frames 103 and a cable traction mechanism. The cable traction mechanism includes a moving track 104, a driving component, a sliding seat 105, a moving frame, a plurality of first clamping components, a fixed frame and a plurality of second clamping components. The driving component includes a servo motor 106, a threaded rod 107 and a ball screw nut pair 108. The moving frame and the fixed frame both include a bracket body 109, a plurality of connecting rods 110 and a plurality of mounting rings 111. Each of the first clamping components and each of the second clamping components includes a mounting frame 112, an electric cylinder 113 and a clamping arc plate 114. Through the foregoing solution, the problem that the existing cable cooling and shaping device can only perform water cooling and shaping on a single cable during actual use, and when a high-temperature extrusion machine can extrude multiple cables simultaneously (for example, a silicone rubber extrusion mechanism and its extruder proposed by Shandong Qixing Electric Technology Development Co., Ltd., which can extrude multiple silicone rubber products simultaneously to improve work efficiency), it cannot perform cooling and shaping on multiple cables simultaneously, and the applicability is poor, can be understood. The foregoing solution can be used in the structure of the cable high-efficiency cooling and shaping device.

[0033] For this specific embodiment, a refrigerator 102 is provided at the inner bottom of the box body 101, and the refrigerator 102 is used to cool the water in the box body 101. A plurality of cooling water spraying frames 103 are provided on both sides inside the box body 101. A moving track 104 is installed in the middle of the top end of the box body 101. A driving component is provided inside the moving track 104. A sliding seat 105 is slidably arranged on the moving track 104. The output end of the driving component is connected to the sliding seat 105. A plurality of first cable clamping holes 115 are provided on the sliding seat 105. A first clamping component is provided at each of the first cable clamping holes 115. A fixing frame is fixedly provided at one end of the top of the box body 101. A plurality of second cable clamping holes 116 are provided on the fixing frame. Each of the second cable clamping holes 116 corresponds to one of the first cable clamping holes 115. A first clamping component is provided at each of the second cable clamping holes 116. First, a plurality of cables extruded by a high-temperature extruder are sequentially placed in the plurality of first cable clamping holes 115. After the ends of the cables extend outside the first cable clamping holes 115, the plurality of cables are clamped and fixed by the first clamping component. Then, the driving component is started to drive the sliding seat 105 to slide on the moving track 104, so that the moving frame moves towards the fixing frame. During the movement, cold water is sprayed on the surfaces of the plurality of cables by the plurality of cooling water spraying frames 103 to complete the cooling and shaping of the plurality of cables. And when the ends of the plurality of cables move to the corresponding second cable clamping holes 116, the second clamping component is started to clamp the ends of the cables. The first clamping component resets. The driving component drives the sliding seat 105 to reset. After the sliding seat 105 resets, the first clamping component clamps and fixes the cables. The second clamping component resets and no longer fixes the cables. Through the movement of the driving component, the repeated feeding process of the plurality of cables is completed. With the above structure, the cooling and shaping of a plurality of cables can be carried out simultaneously, and the applicability is stronger.

[0034] Among them, the servo motor 106 is installed inside the moving track 104. A threaded rod 107 is provided at the output end of the servo motor 106. A ball screw nut pair 108 is provided on the threaded rod 107. The ball screw nut pair 108 is connected to the sliding seat 105. Starting the servo motor 106 drives the threaded rod 107 to rotate. Since the ball screw nut pair 108 is connected to the sliding seat 105, the sliding seat 105 is driven to slide on the moving track 104. A plurality of balls 117 are provided on both sides of the surface of the sliding seat 105 facing the moving track 104. The balls 117 are in contact with the end face of the moving guide rail. Through the arrangement of the balls 117, when the sliding seat 105 slides on the moving track 104, the sliding is smoother.

[0035] Secondly, the bracket body 109 is installed on the corresponding sliding seat 105 and the box body 101. A plurality of connecting rods 110 are provided at the top of the bracket body 109. An installation ring 111 is provided at one end of each connecting rod 110 away from the bracket body 109. Corresponding first cable clamping holes 115 and second cable clamping holes 116 are provided on the installation ring 111. The bracket body 109 is fixed to the corresponding sliding seat 105 or the box body 101 by screws, thereby completing the installation of the moving frame and the fixed frame.

[0036] At the same time, the mounting frame 112 is installed on the outer side wall of the corresponding installation ring 111. An electric cylinder 113 is installed on the mounting frame 112. A clamping arc plate 114 is provided at the output end of the electric cylinder 113. The clamping arc plate 114 is located inside the corresponding first cable clamping hole 115 and the second cable clamping hole 116. Starting the electric cylinder 113 drives the clamping arc plate 114 to move. Through the cooperation of the clamping arc plate 114 and the inner side wall of the first cable clamping hole 115 or the second cable clamping hole 116, the clamping and fixing of the cable are completed.

[0037] When using an efficient cable cooling and shaping device of this embodiment, first, multiple cables extruded by a high-temperature extrusion machine are sequentially placed in a plurality of the first cable clamping holes 115, and after the ends of the cables extend to the outside of the first cable clamping holes 115, the first clamping assembly is used to clamp and fix the multiple cables. Then, the servo motor 106 is started to drive the threaded rod 107 to rotate. Since the ball screw nut pair 108 is connected to the sliding seat 105, the sliding seat 105 is driven to slide on the moving track 104, so that the moving frame moves towards the fixed frame. During the moving process, cold water is sprayed onto the surfaces of the multiple cables by a plurality of the cooling water spraying frames 103 to complete the cooling and shaping of the multiple cables. And when the ends of the multiple cables move to the corresponding second cable clamping holes 116, the second clamping assembly is started to clamp the ends of the cables. The first clamping assembly resets, and the driving component drives the sliding seat 105 to reset. After the sliding seat 105 resets, the first clamping assembly clamps and fixes the cables, and the second clamping assembly resets and no longer fixes the cables. Through the movement of the driving assembly, the repeated feeding process of the multiple cables is completed. With the above structure, the cooling and shaping of multiple cables can be carried out simultaneously, and the applicability is stronger.

[0038] Second Embodiment:

[0039] Based on the first embodiment, please refer to Figures 5 to 7 , Figure 5 which is a partial structural schematic diagram of the cable traction mechanism in the second embodiment, Figure 6 and Figure 5 is a partial enlarged structural view of the B position of Figure 7 and Figure 5 is a partial enlarged structural view of the C position of

[0040] The cable efficient cooling and shaping device provided by the present invention further includes a protective plate 201.

[0041] For this specific embodiment, a through groove 202 is provided through the sliding seat 105, and the protective plate 201 is provided on the end face of the moving track 104. The protective plate 201 penetrates through the through groove 202. Through the setting of the protective plate 201, the end face of the moving track 104 is protected to prevent the external environment from affecting the operation of the driving component.

[0042] Among them, the cross-section of the through groove 202 is arranged in a triangular structure. The protective plate 201 is in clearance fit with the through groove 202. Fixed blocks 203 are arranged on the side surfaces at both ends of the protective plate 201. The fixed blocks 203 are detachably connected to the side surface of the moving track 104. Through the arrangement of the fixed blocks 203, the installation of the protective plate 201 is completed. And because the structure of the protective plate 201 is similar to that of the through groove 202, it is thus avoided that the cooling water sprayed by the cooling water spraying rack 103 accumulates on the upper surface of the protective plate 201, and further avoided that the cooling water enters the inside of the moving track 104 through the gap between the protective plate 201 and the moving track 104, affecting the operation of the driving component.

[0043] When using an efficient cable cooling and shaping device of this embodiment, through the arrangement of the fixed blocks 203, the installation of the protective plate 201 is completed. Through the arrangement of the protective plate 201, the end face of the moving track 104 is protected to avoid the influence of the external environment on the operation of the driving component. And because the structure of the protective plate 201 is similar to that of the through groove 202, it is thus avoided that the cooling water sprayed by the cooling water spraying rack 103 accumulates on the upper surface of the protective plate 201, and further avoided that the cooling water enters the inside of the moving track 104 through the gap between the protective plate 201 and the moving track 104, affecting the operation of the driving component.

[0044] Please refer to Figure 8 , the present invention also provides an efficient cable cooling and shaping method, which is applied to the efficient cable cooling and shaping device as described above, and includes the following steps:

[0045] S1: Place multiple cables extruded by a high-temperature extrusion machine in multiple first cable clamping holes 115 in sequence, and after the ends of the cables extend to the outside of the first cable clamping holes 115, use the first clamping assembly to clamp and fix the multiple cables;

[0046] S2: Start the driving component to drive the sliding seat 105 to slide on the moving track 104, so that the moving frame moves towards the fixed frame. During the movement, use multiple cooling water spraying racks 103 to spray cold water on the surfaces of multiple cables to complete the cooling and shaping of multiple cables;

[0047] S3: When the ends of multiple cables move to the corresponding second cable clamping holes 116, start the second clamping assembly to clamp the ends of the cables, the first clamping assembly resets, and the driving component drives the sliding seat 105 to reset;

[0048] S4: After the sliding seat 105 is reset, the first clamping assembly clamps and fixes the cable, and the second clamping assembly is reset and no longer fixes the cable. Through the movement of the driving assembly, the repeated feeding process of multiple cables is completed.

[0049] In this embodiment, first, multiple cables extruded by a high-temperature extrusion machine are sequentially placed in a plurality of the first cable clamping holes 115, and after the ends of the cables extend outside the first cable clamping holes 115, the first clamping assembly is used to clamp and fix the multiple cables. Then, the driving component is started to drive the sliding seat 105 to slide on the moving track 104, so that the moving frame moves towards the fixed frame. During the movement, cold water is sprayed on the surfaces of the multiple cables by a plurality of the cooling water spraying frames 103 to complete the cooling and shaping of the multiple cables. And when the ends of the multiple cables move to the corresponding second cable clamping holes 116, the second clamping assembly is started to clamp the ends of the cables. The first clamping assembly is reset, and the driving component drives the sliding seat 105 to reset. After the sliding seat 105 is reset, the first clamping assembly clamps and fixes the cable, and the second clamping assembly is reset and no longer fixes the cable. Through the movement of the driving assembly, the repeated feeding process of multiple cables is completed. With the above structure, the cooling and shaping of multiple cables can be carried out simultaneously, and the applicability is stronger.

[0050] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand the entire or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An efficient cable cooling and shaping device, comprising a box body, a refrigerator and a plurality of cooling water spraying frames. The refrigerator is arranged at the inner bottom of the box body and is used to cool the water in the box body. A plurality of the cooling water spraying frames are arranged on both sides inside the box body. It is characterized in that, further comprising a cable traction mechanism; The cable traction mechanism includes a moving track, a driving component, a sliding seat, a moving frame, a plurality of first clamping components, a fixed frame and a plurality of second clamping components. The moving track is installed in the middle of the top end of the box body. The driving component is arranged inside the moving track. The sliding seat is slidably arranged on the moving track. The output end of the driving component is connected to the sliding seat. A plurality of first cable clamping holes are arranged on the sliding seat. The first clamping components are arranged at each of the first cable clamping holes. The fixed frame is fixedly arranged at one end of the top of the box body. A plurality of second cable clamping holes are arranged on the fixed frame. Each of the second cable clamping holes corresponds to one of the first cable clamping holes. The first clamping components are arranged at each of the second cable clamping holes.

2. The efficient cable cooling and shaping device according to claim 1, characterized in that, The driving component includes a servo motor, a threaded rod and a ball screw nut pair. The servo motor is installed inside the moving track. The threaded rod is arranged at the output end of the servo motor. The ball screw nut pair is arranged on the threaded rod. The ball screw nut pair is connected to the sliding seat.

3. The efficient cable cooling and shaping device according to claim 2, characterized in that, Both the moving frame and the fixed frame include a bracket body, a plurality of connecting rods and a plurality of mounting rings. The bracket body is installed on the corresponding sliding seat and the box body. A plurality of the connecting rods are arranged at the top end of the bracket body. The mounting rings are arranged at one end of each connecting rod away from the bracket body. The corresponding first cable clamping holes and second cable clamping holes are arranged on the mounting rings.

4. The efficient cable cooling and shaping device according to claim 3, characterized in that, Each of the first clamping components and each of the second clamping components includes a mounting frame, an electric cylinder and a clamping arc plate. The mounting frame is installed on the outer side wall of the corresponding mounting ring. The electric cylinder is installed on the mounting frame. The clamping arc plate is arranged at the output end of the electric cylinder. The clamping arc plate is located inside the corresponding first cable clamping hole and second cable clamping hole.

5. The efficient cable cooling and shaping device according to claim 2, characterized in that, The efficient cable cooling and shaping device further includes a protective plate. A through groove is arranged through the sliding seat. The protective plate is arranged at the end face of the moving track. The protective plate penetrates through the through groove.

6. The efficient cable cooling and shaping device according to claim 5, characterized in that, The cross-section of the through groove is arranged in a triangular structure. The protective plate is in clearance fit with the through groove. Fixed blocks are arranged on the side surfaces of both ends of the protective plate, and the fixed blocks are detachably connected to the side surface of the moving track.

7. A method for efficient cooling and shaping of a cable, applied to the cable efficient cooling and shaping device as described in claim 1, characterized in that It includes the following steps: Place multiple cables extruded by a high-temperature extrusion machine into multiple said first cable clamping holes in sequence. After the end of the cable extends to the outside of the first cable clamping hole, use the first clamping assembly to clamp and fix the multiple cables; Start the driving component to drive the sliding seat to slide on the moving track, so that the moving frame moves towards the fixed frame. During the movement, use multiple said cooling water spraying frames to spray cold water on the surfaces of the multiple cables to complete the cooling and shaping of the multiple cables; When the ends of the multiple cables move to the corresponding second cable clamping holes, start the second clamping assembly to clamp the ends of the cables. The first clamping assembly resets, and the driving component drives the sliding seat to reset; After the sliding seat resets, the first clamping assembly clamps and fixes the cables, and the second clamping assembly resets and no longer fixes the cables. Through the movement of the driving assembly, the repeated feeding process of the multiple cables is completed.

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