Labor-saving corn straw smashing device

Abstract

The utility model discloses a labor-saving corn straw crushing device, and relates to the technical field of straw crushing equipment. A labor-saving corn straw smashing device comprises a shell. The feeding hole is formed in the shell and is used for feeding; the discharge hole is formed in the shell and is used for discharging; the feeding mechanism is installed on the shell, located on the side edge of the feeding port and used for feeding; the crushing assembly is located in the shell, adjacent to the feeding mechanism and used for crushing straw; and the conveying belt is located in the shell, is in butt joint with the crushing assembly and the discharging opening and is used for conveying out the crushed materials. The utility model can reduce the labor burden, improve the crushing efficiency and effectively prevent blockage.

Description

TECHNICAL FIELD

[0001] The utility model relates to straw crushing equipment technical field, concretely relates to a labor -saving corn straw pulverizing device. BACKGROUND

[0002] Straw can be used to make mailing fees, fuel, shaving board, paper and other raw materials of various production industries after recycling. In some product manufacturing processes, the straw needs to be crushed to obtain several centimeters of crushed material and then sent to the next process.

[0003] In the use process of the existing straw crushing equipment, it is usually necessary to manually hold a bundle of straw and manually send it into the crusher. This operation method not only consumes a lot of labor, but also greatly depends on manual operation. Long-time feeding operation is prone to cause worker fatigue, and it is difficult to adapt to the working rhythm of the straw feed production and processing line. Therefore, the existing technology has high labor cost and high labor intensity, which is not conducive to improving production efficiency and reducing production cost.

[0004] Clogging is another serious problem faced by the existing straw crushing equipment. Due to the differences in moisture, length, hardness and other factors of the straw, as well as the limitations of the internal structure and cutter design of the equipment, the straw is prone to entangle in the cutter or screen hole during the crushing process, causing clogging. This not only wastes time, but also seriously affects the working efficiency. At the same time, frequent clogging and cleaning operation can also accelerate the wear and tear and aging of the equipment, increasing the maintenance cost.

[0005] In view of the above problems existing in the existing straw crushing equipment, it is urgent to develop a new type of straw crushing equipment which can reduce the labor burden, improve the crushing efficiency and effectively prevent clogging. Through technical innovation and structural design optimization, the functions of automatic feeding, high-efficiency crushing and anti-clogging are realized to meet the efficient, convenient and low-cost needs of straw processing in agricultural production. INVENTION CONTENTS

[0006] The technical problem to be solved by the utility model is that the existing straw crushing equipment has the problems of labor-consuming and easy clogging, and the purpose is to provide a labor-saving corn straw pulverizing device which can reduce the labor burden, improve the crushing efficiency and effectively prevent clogging.

[0007] The utility model realizes the following technical scheme:

[0008] A labor-saving corn straw pulverizing device, comprising

[0009] A shell;

[0010] A feed inlet is installed on the shell for feeding;

[0011] A discharge port is installed on the shell for discharging;

[0012] A feeding mechanism is installed on the shell and located at the side of the feeding port for feeding;

[0013] A crushing assembly is located in the shell and adjacent to the feeding mechanism for crushing the straw;

[0014] A conveying belt is located in the shell and respectively connected with the crushing assembly and the discharging port for conveying the crushed material.

[0015] As a possible design, the feeding mechanism includes a conveying roller, a conveying drum, a feeding belt and a driving assembly,

[0016] The conveying roller is rotatably installed above the feeding belt in the shell for driving the straw on the feeding belt to the crushing assembly;

[0017] The conveying drum is rotatably installed in the shell for winding the feeding belt;

[0018] One end of the feeding belt is fixed on the conveying drum, and the other end can extend out of the shell for conveying the straw to be crushed;

[0019] The driving assembly is installed on the side of the shell and in transmission connection with the conveying roller and the conveying drum for driving the conveying roller and the conveying drum to rotate.

[0020] As a possible design, the conveying roller includes a roller body, a spiral belt and a plurality of feeding protrusions,

[0021] The roller body is rotatably installed in the shell and in transmission connection with the driving assembly;

[0022] The number of the spiral belts is two, and the two spiral belts are symmetrically arranged at both ends of the roller body;

[0023] The number of the feeding protrusions is multiple, and the multiple feeding protrusions are evenly arranged around the roller body in the middle section of the roller body.

[0024] As a possible design, the driving assembly includes a driving motor, a driving wheel, a first transmission wheel, a first transmission belt, a second transmission wheel and a second transmission belt,

[0025] The driving motor is installed on the side of the shell and coaxially connected with the driving wheel;

[0026] The driving wheel is coaxially connected with the conveying drum;

[0027] The first transmission wheel is rotatably installed on the side of the shell;

[0028] The first transmission belt is sleeved on the driving wheel and the first transmission wheel for driving the first transmission wheel to rotate;

[0029] The second transmission wheel is coaxially connected with the conveying roller;

[0030] The second transmission belt is sleeved on the second transmission wheel and the first transmission wheel.

[0031] As a possible design, the feeding mechanism further comprises a support protection assembly, which is rotatably installed on the feeding port and located outside the conveying drum, and is used for supporting and protecting the feeding belt.

[0032] As a possible design, the support protection assembly comprises an arc-shaped cover, a guide plate, a first connecting piece and a second connecting piece,

[0033] The arc-shaped cover is rotatably installed on the feeding port and is used for protecting the feeding belt;

[0034] One end of the guide plate is rotatably connected with the arc-shaped cover, and the guide plate is used for supporting the feeding belt when the straw is conveyed;

[0035] One end of the first connecting piece is fixed on the arc-shaped cover, and the other end is detachably connected with the guide plate, and the first connecting piece is used for supporting the feeding belt and limiting the position of the guide plate when the straw is conveyed;

[0036] One end of the second connecting piece is fixed on the side edge of the shell, and the other end is detachably connected with the side edge of the guide plate, and the second connecting piece is used for limiting the positions of the arc-shaped cover and the guide plate.

[0037] As a possible design, the crushing assembly comprises a crushing motor, a crushing gear, a driven wheel and a crushing roller,

[0038] The crushing motor is installed on the side edge of the shell and is in transmission connection with the crushing gear;

[0039] The crushing gear is installed in the shell and is in meshing connection with the driven wheel;

[0040] The number of the driven wheels is two, and the two driven wheels are symmetrically arranged on both sides of the crushing gear;

[0041] The number of the crushing rollers is two, and the two crushing rollers are coaxially connected with the driven wheels respectively and are rotatably installed in the shell and located on the side edge of the feeding mechanism.

[0042] As a possible design, the crushing assembly further comprises a crushing block and a pressing block,

[0043] The number of the crushing blocks is multiple, and the multiple crushing blocks are uniformly distributed on the crushing roller;

[0044] The number of the pressing blocks is multiple, and the multiple pressing blocks are uniformly distributed on the crushing roller.

[0045] As a possible design, the crushing block and the pressing block are both protruding blocks, and the surface of the crushing block and the surface of the pressing block are both provided with protruding pieces.

[0046] As a possible design, the height of the crushing block is greater than the height of the pressing block.

[0047] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0048] The utility model discloses a feeding mechanism is unfolded, directly straw is laid on it, and then is rolled and is received can send the straw into the feed inlet, after the straw is sent into the crushing assembly crushing by the extrusion of the feeding mechanism, finally is exported by the conveyer belt, does not need artificial to bend down and hold up the straw and send into the feed inlet, can save manpower, and in the crushing mechanism, because it has irregularly arranged crushing block and extrusion block, can improve the crushing efficiency, avoids the fiber adhesion on it, thereby prevents the blockage. BRIEF DESCRIPTION OF DRAWINGS

[0049] The drawings described herein are used to provide further understanding of the embodiments of the utility model and constitute a part of this application, and do not constitute the limitation to the embodiments of the utility model. In the drawings:

[0050] Figure 1 It is the front view of a labor-saving corn straw smashing device of the utility model;

[0051] Figure 2 It is the side sectional view of a labor-saving corn straw smashing device of the utility model;

[0052] Figure 3 It is the side view of a labor-saving corn straw smashing device of the utility model;

[0053] Figure 4 It is the structure schematic view of the support protection component of a labor-saving corn straw smashing device of the utility model;

[0054] Figure 5 It is the structure schematic view of the crushing assembly of a labor-saving corn straw smashing device of the utility model.

[0055] Mark and corresponding part name in the drawing:

[0056] 1 - shell;

[0057] 2 - feed inlet;

[0058] 3 - discharge port;

[0059] 4 - feeding mechanism; 41 - conveying roller; 411 - roller body; 412 - spiral belt; 413 - feeding convex plate; 42 - conveying drum; 43 - feeding belt; 44 - driving assembly; 441 - driving motor; 442 - driving wheel; 443 - first transmission wheel; 444 - first transmission belt; 445 - second transmission wheel; 446 - second transmission belt; 45 - support protection component; 451 - arc cover; 452 - guide plate; 453 - first connecting piece; 454 - second connecting piece;

[0060] 5-crushing assembly; 51-crushing motor; 52-crushing gear; 53-idler; 54-crushing roller; 55-crushing block; 56-extrusion block; 57-protrusion;

[0061] 6-conveyor belt. DETAILED DESCRIPTION

[0062] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and drawings, and the illustrative embodiments of the present application and the description thereof are only used to explain the present application and not to limit the present application.

[0063] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0064] It should be noted that when a component is referred to as being "fixed" or "set" on another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to the other component.

[0065] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0067] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0068] Example

[0069] This embodiment provides a labor-saving corn stalk crushing device, such as... Figures 1-5 As shown, the device includes a housing 1, an inlet 2, an outlet 3, a feeding mechanism 4, a crushing assembly 5, and a conveyor belt 6. The housing 1 is hollow inside, used to install the inlet 2, outlet 3, feeding mechanism 4, crushing assembly 5, and conveyor belt 6. The inlet 2 is located on the housing 1 for feeding material; its shape can be square, round, rectangular, or any other shape. The feeding mechanism 4 is located inside it. The outlet 3 is installed on the housing 1 and connects to the conveyor belt 6 for discharging material. The feeding mechanism 4 is installed on the housing 1 and located to the side of the inlet 2. When feeding is needed, the feeding belt inside is pulled out, straw is piled on it, and then the straw is crushed by retracting the feeding belt. The crushing assembly 5 is rotatably installed inside the housing 1, adjacent to the feeding mechanism 4. After the feeding mechanism 4 compresses and conveys the straw, the crushing assembly 5 receives the compressed straw and crushes it. The conveyor belt 6 is located inside the housing 1 and connects to both the crushing assembly 5 and the outlet 3, used to deliver the crushed material. Preferably, the conveyor belt 6 is a spiral conveyor belt.

[0070] In some embodiments, refer to Figures 1-2 and Figure 5 The feeding mechanism 4 includes a conveyor roller 41, a conveyor drum 42, a feeding belt 43, and a drive assembly 44. The conveyor roller 41 is rotatably installed inside the housing 1. It is opposite to the conveyor drum 42 and rotates in the opposite direction. It is located above the feeding belt 43 and is used to cooperate with the feeding belt 43 to drive the straw on the feeding belt 43 to the crushing component 5. The conveyor drum 42 is rotatably installed inside the housing 1 and is used to wind up the feeding belt 43. When it is necessary to load straw, the feeding belt 43 can be pulled or the conveyor drum 42 can be driven to rotate counterclockwise by the drive component 44 to send out the feeding belt 43. Then, the feeding belt 43 is flattened, the straw is placed on the feeding belt 43, the drive component 44 is started, the feeding belt 43 is retracted, and the straw is wound up. One end of the feeding belt 43 is fixed to the conveyor drum 42, and the other end can extend out of the housing 1 for transporting the straw to be crushed. The drive component 44 is installed on the side of the housing 1 and is connected to the conveyor roller 41 and the conveyor drum 42 for driving the conveyor roller 41 and the conveyor drum 42 to rotate.

[0071] Preferably, the feeding belt 43 is made of flexible material, specifically, it can be made of polyester fiber material or other flexible material.

[0072] In some embodiments, with reference to Figure 1 , the conveying roller 41 comprises a roller body 411, a spiral belt 412 and a feeding convex plate 413. The roller body 411 is rotatably installed in the housing 1 and is in transmission connection with the driving assembly 44, which rotates reversely with the conveying drum 42; the spiral belt 412 is in number of two, and the two spiral belts 412 are symmetrically arranged at both ends of the roller body 411, and can drive the straw into the feeding port 2 while rotating with the roller body 411; the feeding convex plate 413 is in number of multiple, and the multiple feeding convex plates 413 are uniformly arranged around the roller body 411 in the middle section of the roller body 411, and the multiple feeding convex plates 413 are all located between the two spiral belts 412 and can drive the straw into the feeding port 2 while rotating with the roller body 411.

[0073] In some embodiments, with reference to Figure 1 , the driving assembly 44 comprises a driving motor 441, a driving wheel 442, a first transmission wheel 443, a first transmission belt 444, a second transmission wheel 445 and a second transmission belt 446. The driving motor 441 is installed on the side of the housing 1 and is coaxially connected with the driving wheel 442 for driving the driving wheel 442 to rotate; the driving wheel 442 is coaxially connected with the conveying drum 42 for driving the conveying drum 42 to rotate; the first transmission wheel 443 is rotatably installed on the side of the housing 1, and the first transmission belt 444 and the second transmission belt 446 are respectively sleeved on the first transmission wheel 443; the first transmission belt 444 is sleeved on the driving wheel 442 and the first transmission wheel 443 for driving the first transmission wheel 443 to rotate; the second transmission wheel 445 is coaxially connected with the conveying roller 41; and the second transmission belt 446 is sleeved on the second transmission wheel 445 and the first transmission wheel 443.

[0074] In some embodiments, with reference to Figures 1-4 , the feeding mechanism 4 further comprises a supporting protection assembly 45 rotatably installed on the feeding port 2, preferably hinged, and located on the outer side of the conveying drum 42. When it is needed to crush the straw, the supporting protection assembly 45 can be turned away to provide inclined support for the feeding belt 43, so as to facilitate the conveying of the straw; when the machine is turned off, the supporting protection assembly 45 can be buckled on the conveying drum 42 to protect the feeding belt 43.

[0075] In some embodiments, with reference to Figures 1-4The support protection assembly 45 comprises an arc-shaped cover 451, a guide plate 452, a first connecting piece 453 and a second connecting piece 454. The arc-shaped cover 451 is rotatably installed at the feeding port 2 and is used for protecting the feeding belt 43. The side close to the conveying drum 42 is arc-shaped and can be fitted to the shape of the conveying drum 42. The guide plate 452 is rotatably connected, preferably hingedly connected, to one end of the arc-shaped cover 451 and is clamped at the top of the arc-shaped cover 451. The guide plate 452 can support the feeding belt 43 when the straw needs to be conveyed and can be fixed when the straw does not need to be conveyed. The first connecting piece 453 is fixed to the arc-shaped cover 451 at one end and is detachably connected to the guide plate 452 at the other end. The first connecting piece 453 can be clamped, hooked or connected in other ways and is used for supporting the feeding belt 43 and limiting the position of the guide plate 452 when the straw is conveyed. The second connecting piece 454 is fixed to the side of the shell 1 at one end and is detachably connected to the side of the guide plate 452 at the other end. The second connecting piece 454 can be clamped, hooked or connected in other ways and is used for limiting the positions of the arc-shaped cover 451 and the guide plate 452.

[0076] In some embodiments, with reference to Figure 5 The crushing assembly 5 comprises a crushing motor 51, a crushing gear 52, driven wheels 53 and crushing rollers 54. The crushing motor 51 is installed at the side of the shell 1 and is coaxially connected to the crushing gear 52. The crushing gear 52 is rotatably installed in the shell 1 and is engaged with the driven wheels 53. There are two driven wheels 53, which are symmetrically arranged on the two sides of the crushing gear 52 and are used to drive the crushing rollers 54 to rotate. There are two crushing rollers 54, each of which is coaxially connected to one of the driven wheels 53 and is rotatably installed in the shell 1 at the side of the feeding mechanism 4. In use, the crushing motor 51 is started to drive the two crushing rollers 54 to rotate in the same direction, so as to crush the straw.

[0077] In some embodiments, with reference to Figure 2 and Figure 5 The crushing assembly 5 further comprises crushing blocks 55 and extruding blocks 56. There are a plurality of crushing blocks 55, which are uniformly distributed on the crushing rollers 54. There are a plurality of extruding blocks 56, which are uniformly distributed on the crushing rollers 54. The distribution of the crushing blocks 55 and the extruding blocks 56 can form irregular pores on the surface of the crushing rollers 54, avoid periodic impact on the material when the rotor rotates at high speed, avoid triggering equipment resonance, thereby avoiding component fatigue and structural damage, and prolonging the service life. In addition, due to the high water content of part of the crushed straw, the straw is impacted at different angles and positions in the crushing cavity by the crushing blocks 55 and the extruding blocks 56, generating more complex collision, shearing and grinding effects, improving the uniformity of the crushed particle size, changing the movement trajectory of the straw in the cavity, reducing the risk of straw accumulation or being stuck in a fixed position, and reducing the probability of blockage.

[0078] In some embodiments, with reference to Figure 2 andFigure 5 The crushing block 55 and the extruding block 56 are both convex blocks, and the surface of the crushing block 55 and the surface of the extruding block 56 are both provided with convex pieces 57. The convex blocks and the convex pieces 57 of the surfaces can expand the coverage area of the rotor on the straw, avoid repeated impact on the same track, and reduce the "leakage" phenomenon that part of the straw is not effectively crushed.

[0079] In some embodiments, with reference to Figure 2 and Figure 5 The height of the crushing block 55 is greater than the height of the extruding block 56. Such a height difference can produce irregular impact during extrusion, avoid multiple convex pieces 57 from simultaneously contacting the straw, reduce the instantaneous load, and protect the rotating shaft and the crushing motor 51.

[0080] The above detailed description of the specific embodiments has further detailed the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A labor-saving corn straw pulverizing device, characterized in that, The utility model relates to a straw crushing device A housing (1); A feeding port (2) is installed on the housing (1) for feeding; A discharging port (3) is installed on the housing (1) for discharging; A feeding mechanism (4) is installed on the housing (1) and located on the side of the feeding port (2) for feeding; A crushing assembly (5) is located in the housing (1) and arranged adjacent to the feeding mechanism (4) for crushing straw; A conveying belt (6) is located in the housing (1) and respectively connected with the crushing assembly (5) and the discharging port (3) for conveying the crushed material.

2. The labor-saving corn straw crushing device according to claim 1, characterized in that, The feeding mechanism (4) comprises a conveying roller (41), a conveying drum (42), a feeding belt (43) and a driving assembly (44), The conveying roller (41) is rotatably installed in the housing (1) and located above the feeding belt (43) for driving the straw on the feeding belt (43) to the crushing assembly (5); The conveying drum (42) is rotatably installed in the housing (1) for winding the feeding belt (43); One end of the feeding belt (43) is fixed on the conveying drum (42) and the other end can extend out of the housing (1) for transporting the straw to be crushed; The driving assembly (44) is installed on the side of the housing (1) and connected with the conveying roller (41) and the conveying drum (42) for driving the conveying roller (41) and the conveying drum (42) to rotate.

3. The labor-saving corn straw crushing device according to claim 2, characterized in that, The conveying roller (41) comprises a roller body (411), a spiral belt (412) and a feeding convex plate (413), The roller body (411) is rotatably installed in the housing (1) and connected with the driving assembly (44); The spiral belt (412) is arranged in two on both ends of the roller body (411); The feeding convex plate (413) is arranged in multiple on the middle section of the roller body (411).

4. The labor-saving corn straw crushing device according to claim 2, characterized in that, The driving assembly (44) comprises a driving motor (441), a driving wheel (442), a first transmission wheel (443), a first transmission belt (444), a second transmission wheel (445) and a second transmission belt (446), The driving motor (441) is coaxially connected with the driving wheel (442) and installed on the side of the housing (1); The driving wheel (442) is coaxially connected with the conveying drum (42); The first transmission wheel (443) is rotatably installed on the side of the housing (1); The first transmission belt (444) is sleeved on the driving wheel (442) and the first transmission wheel (443) for driving the first transmission wheel (443) to rotate; The second transmission wheel (445) is coaxially connected with the conveying roller (41); The second transmission belt (446) is sleeved on the second transmission wheel (445) and the first transmission wheel (443).

5. The labor-saving corn straw crushing device according to claim 2, characterized in that, The feeding mechanism (4) further comprises a supporting and protecting assembly (45) rotatably installed on the feeding port (2) and located outside the conveying drum (42) for supporting and protecting the feeding belt (43).

6. The labor-saving corn straw crushing device according to claim 5, characterized in that, The support protection assembly (45) comprises an arc cover (451), a guide plate (452), a first connecting piece (453) and a second connecting piece (454), The arc cover (451) is rotatably installed on the feeding port (2) and is used for protecting the feeding belt (43); One end of the guide plate (452) is rotatably connected with the arc cover (451) and is used for supporting the feeding belt (43) during the conveying of the straw; One end of the first connecting piece (453) is fixed on the arc cover (451), and the other end is detachably connected with the guide plate (452), which is used for supporting the feeding belt (43) and limiting the position of the guide plate (452) during the conveying of the straw; One end of the second connecting piece (454) is fixed on the side of the shell (1), and the other end is detachably connected with the side of the guide plate (452), which is used for limiting the positions of the arc cover (451) and the guide plate (452).

7. The labor-saving corn straw crushing device according to claim 1, characterized in that, The crushing assembly (5) comprises a crushing motor (51), a crushing gear (52), a driven wheel (53) and a crushing roller (54), The crushing motor (51) is installed on the side of the shell (1) and is in transmission connection with the crushing gear (52); The crushing gear (52) is installed in the shell (1) and is in meshing connection with the driven wheel (53); There are two driven wheels (53), and the two driven wheels (53) are symmetrically arranged on both sides of the crushing gear (52); There are two crushing rollers (54), and the two crushing rollers (54) are coaxially connected with the driven wheel (53) respectively and are rotatably installed in the shell (1) on the side of the feeding mechanism (4).

8. The labor-saving corn straw crushing device according to claim 7, characterized in that, The crushing assembly (5) further comprises a crushing block (55) and an extrusion block (56), There are multiple crushing blocks (55), and the multiple crushing blocks (55) are uniformly distributed on the crushing roller (54); There are multiple extrusion blocks (56), and the multiple extrusion blocks (56) are uniformly distributed on the crushing roller (54).

9. The labor-saving corn straw crushing device according to claim 8, characterized in that, The crushing block (55) and the extrusion block (56) are both protrusions, and the surfaces of the crushing block (55) and the extrusion block (56) are provided with protrusions (57).

10. The labor-saving corn straw crushing device according to claim 8, characterized in that, The height of the crushing block (55) is greater than the height of the extrusion block (56).

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