A kind of auger cleaning structure and corn harvester

Abstract

The utility model relates to a kind of screw conveyor cleaning structure and corn harvester, involve agricultural machinery technical field, wherein, a kind of screw conveyor cleaning structure, including the shell of upper opening structure, shell bottom is throughly set and is provided with multiple sieve holes and discharge port, shell interior is provided with the first cleaning channel, second cleaning channel and third cleaning channel sequentially communicated and all communicate sieve hole, tail end of third cleaning channel communicates discharge hole, further include: upper screw conveyor, it is parallelly provided with two and respectively located first cleaning channel and second cleaning channel, two upper screw conveyors all include the upper stirrer of rotationally connected in shell, propelling blade spirally wound in the one end of upper stirrer and the anti-thrust blade of fixedly connected in the other end of upper stirrer;Lower screw conveyor, it is rotationally connected in shell and located third cleaning channel.The utility model can reduce the probability of bract accumulation in screw conveyor tail, and improve grain clean recovery rate.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a screw conveyor cleaning structure and a corn harvester. Background Technology

[0002] Husk cleaning is a crucial step in corn harvesting using corn harvesters, used to separate the husks from the corn kernels encased in the husks. Currently, the mainstream cleaning method primarily uses auger cleaning, typically a double-auger system. The auger mainly performs the pushing function. During the cleaning process, the kernels are wrapped in the husks, and the auger cannot fully remove the kernels inside the husks. After the husks are discharged by the auger, the kernels inside are lost on the ground, resulting in significant kernel loss. Furthermore, the husks containing kernels tend to accumulate at the auger's outlet, affecting cleaning efficiency. Utility Model Content

[0003] This utility model provides a screw conveyor cleaning structure and a corn harvester, which can reduce the probability of husks accumulating at the tail of the screw conveyor and improve the grain cleaning and recovery rate.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a screw conveyor cleaning structure, including a shell with an upward opening, a discharge port and multiple screen holes through the bottom of the shell, and a first cleaning channel, a second cleaning channel and a third cleaning channel that are sequentially connected and all connected to the screen holes inside the shell. The tail end of the third cleaning channel is connected to the discharge port. The structure also includes: There are two upper augers arranged in parallel and located in the first cleaning channel and the second cleaning channel respectively. Each upper auger includes an upper stirring roller rotatably connected to the housing, a pushing blade spirally wound around one end of the upper stirring roller, and a reverse pushing blade fixedly connected to the other end of the upper stirring roller. The lower auger is rotatably connected to the housing and located in the third cleaning channel.

[0005] The beneficial effects of this invention are as follows: After the husks are conveyed and initially screened in the first and second cleaning channels, they are conveyed and actively cleaned in the third cleaning channel, and finally discharged from the end of the third cleaning channel, so that the grains encased in the husks are completely removed, effectively improving the grain cleaning and recovery efficiency. The husks are transferred multiple times between the first, second, and third cleaning channels, which increases the cleaning area compared to the existing double auger conveying and cleaning method. This loosens the husks during the conveying process, reducing the tightness of the remaining grains, making it easier to separate the grains during subsequent auger conveying. At the same time, the driving blades and the counter-driving blades rotate simultaneously, pushing the material in opposite directions, reducing the probability of material accumulating at the auger outlet and improving the cleaning efficiency.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, each of the thrust blades has a helical structure, and the helical direction is opposite to that of the corresponding thrust blade.

[0008] Furthermore, both of the upper augers also include scrapers, which are located between the pushing blades and the corresponding reverse thrust blades, and are fixedly connected to the upper stirring rollers and / or the pushing blades and / or the reverse thrust blades.

[0009] Furthermore, each of the thrust blades has a straight plate structure and extends along the axial direction of the corresponding upper agitator.

[0010] Furthermore, both upper augers also include multiple upper spike teeth, each upper spike tooth being spaced apart from the corresponding upper stirring roller, and spaced apart from the corresponding pushing blade and / or the reverse thrust blade.

[0011] Furthermore, at least one upper spike tooth is provided at the middle position of the pitch of each of the pushing blades and / or at the position corresponding to each of the reverse thrust blades.

[0012] Furthermore, each of the upper nail teeth has a straight rod-like structure, or each of the upper nail teeth has a curved rod-like structure, or some of the upper nail teeth have a straight rod-like structure and the others have a curved rod-like structure.

[0013] Furthermore, the two upper augers are located on the same plane, and the plane where the lower auger is located is at a lower height than the plane where the upper augers are located. The distances from the lower auger and the two upper augers to the bottom of the housing are all equal.

[0014] Furthermore, a partition is fixedly connected to the upper opening of the housing, the lower auger is located inside the partition, and a feed inlet is provided through the side wall of the partition. The feed inlet opens towards the end where the adjacent pushing blade and the reverse thrust blade are fixedly connected to each other, and the feed inlet and the discharge outlet are respectively close to the head and tail ends of the lower auger.

[0015] This utility model also provides a corn harvester, including the aforementioned auger cleaning structure. Attached Figure Description

[0016] Figure 1 This is a top view of the auger cleaning structure of this utility model; Figure 2 For the present utility model Figure 1 A magnified view of a portion of the image; Figure 3This is a partial structural diagram of the auger cleaning structure of this utility model. The arrows in the diagram indicate the material conveying direction. Figure 4 This is a structural diagram of the upper and lower augers of this utility model; Figure 5 For the present utility model Figure 4 Enlarged view of section A in the middle; Figure 6 This is a first partial structural side view of the present invention, mainly used to show the spatial arrangement of the lower auger and the two upper augers; Figure 7 This is a second partial structural side view of the present invention, mainly used to show the structure of the upper nail teeth.

[0017] The attached diagram lists the components represented by each number as follows: 1. Shell; 11. Cover; 111. Inlet; 2. Upper auger; 21. Upper agitator roller; 22. Pushing blade; 23. Reverse pushing blade; 24. Scraper; 25. Upper nail tooth; 3. Lower auger; 31. Lower agitator roller; 32. Discharge blades; 33. Lower spike teeth; 34. Throwing plate; 35. Anti-tangling plate; 4. First sprocket mechanism; 5. Transmission sprocket mechanism; 6. Second sprocket mechanism. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] Example 1 like Figures 1-7 This utility model provides a screw conveyor cleaning structure, including a shell 1 with an upward opening, a discharge port and multiple screen holes through the bottom of the shell 1, and a first cleaning channel, a second cleaning channel and a third cleaning channel that are sequentially connected and all connected to the screen holes inside the shell 1. The tail end of the third cleaning channel is connected to the discharge port, and the structure also includes: There are two upper augers 2 arranged in parallel and located in the first cleaning channel and the second cleaning channel respectively. Each upper auger 2 includes an upper stirring roller 21 rotatably connected to the housing 1, a pushing blade 22 spirally wound around one end of the upper stirring roller 21, and a reverse pushing blade 23 fixedly connected to the other end of the upper stirring roller 21. The lower auger 3 is rotatably connected to the housing 1 and located in the third cleaning channel.

[0020] The beneficial effects of this embodiment are as follows: After the husks are conveyed and initially screened in the first and second cleaning channels, they are conveyed and actively cleaned in the third cleaning channel. Finally, the husks are discharged from the end of the third cleaning channel, so that the grains encased in the husks are completely removed, effectively improving the grain cleaning and recovery efficiency. The husks are transferred multiple times between the first, second, and third cleaning channels, which increases the cleaning area compared to the existing double auger conveying and cleaning method. This loosens the husks during the conveying process, reducing the tightness of the remaining grains. The grains are then more easily separated during subsequent auger conveying. At the same time, the driving blade 22 and the counter-pushing blade 23 rotate simultaneously, pushing the material towards each other, reducing the probability of material accumulating at the auger outlet and improving the cleaning efficiency.

[0021] One end of the lower auger 3 and the two upper augers 2 extends out of the housing 1 to obtain power by connecting to the drive equipment through a sprocket mechanism. During installation, the housing 1 is located below the peeler outlet of the harvester, with the top opening of the first cleaning channel, which is away from the third cleaning channel, facing the peeler outlet.

[0022] In operation, the husk mixture from the peeling machine outlet falls into the first cleaning channel, and simultaneously disperses into the second cleaning channel. The lower auger 3 and the two upper augers 2 start simultaneously for cleaning. During cleaning, the pushing blades 22 and the counter-pushing blades 23 of the two upper augers 2 rotate simultaneously, pushing the mixture towards the end where they are close to each other (the outlet end). During this continuous pushing process, the mixture is also pushed into the third cleaning channel, where it is pushed towards the discharge hole by the rotating lower auger 3, thus discharging the husks. As the lower auger 3 and the two upper augers 2 transport the husks, the husks continuously tumble, causing the entrained grains to separate and fall through the sieve holes at the bottom of the first, second, or third cleaning channel.

[0023] Based on the above embodiment, the length ratio of the reverse thrust blade 23 to the corresponding push blade 22 is 1:5.

[0024] Example 2 like Figures 1-6 Each thrust blade 23 has a spiral structure, and the spiral direction is opposite to that of the corresponding thrust blade 22.

[0025] The beneficial effect of the preferred solution in the above embodiments is that when the upper stirring roller 21 rotates, the pushing blade 22 and the reverse pushing blade 23, which are both spiral in structure, rotate in opposite directions. The pushing blade 22 pushes the material towards the reverse pushing blade 23, and under the push of the reverse pushing blade 23, the probability of material accumulating at the auger outlet end is reduced, thus improving the cleaning efficiency.

[0026] Example 3 like Figure 4 and Figure 5 Based on embodiment 1, both upper augers 2 further include scrapers 24, which are located between the pushing blades 22 and the corresponding reverse thrust blades 23, and are fixedly connected to the upper stirring rollers 21 and / or the pushing blades 22 and / or the reverse thrust blades 23.

[0027] The beneficial effect of adopting the preferred solution in the above embodiments is that the scraper 24 is located between the pushing blade 22 and the corresponding reverse pushing blade 23, so that during rotation, the material is pushed to the next level of the second or third cleaning channel, thereby improving the material cleaning efficiency and reducing clogging.

[0028] At the same time, when the scraper 24 is fixed to both the push blade 22 and the reverse push blade 23, the scraper 24 forms a reinforced structure, which can improve the structural strength.

[0029] The number of scrapers 24 fixed on each upper auger 2 can be one, two, three, or four, etc. When there are multiple scrapers, they are distributed circumferentially, and the length of each scraper 24 is not greater than the size of the corresponding push blade 22 and / or reverse push blade 23.

[0030] Example 4 As in Example 2, each thrust blade 23 has a straight plate structure and extends axially along the corresponding upper agitator 21. This allows for the throwing of material during rotation, improving cleaning efficiency.

[0031] Example 5 like Figure 4 and Figure 5 Based on embodiments 1-4, both upper augers 2 further include multiple upper spike teeth 25, each upper spike tooth 25 is spaced apart on the corresponding upper stirring roller 21, and spaced apart on the corresponding pushing blade 22 and / or reverse thrust blade 23.

[0032] The beneficial effect of adopting the preferred solution in the above embodiments is that during the cleaning operation, the upper nail teeth 25 rotate synchronously, which can lift up the husks, making it easier to fully disperse the husks, thereby fully separating the grains and improving the cleaning efficiency. During the cleaning process, the grains fall from the sieve holes.

[0033] The length of the upper spike tooth 25 is not greater than the size of the corresponding push blade 22 and / or reverse push blade 23.

[0034] In the figure, the upper spike teeth 25 are only distributed at the locations of the corresponding pusher blades 22.

[0035] Example 6 like Figure 4 and Figure 5Based on embodiments 1-5, at least one upper spike tooth 25 is provided at the middle position of the pitch of each push blade 22 and / or at the corresponding position of each reverse thrust blade 23.

[0036] The advantage of adopting the preferred solution in the above embodiments is that it ensures that the buds at each pitch can be picked up by the upper nail teeth 25, thereby ensuring high cleaning efficiency.

[0037] Specifically, the number of upper spike teeth 25 at each intermediate position can be one, two, three, or four, etc., but only one is shown in the figure. Furthermore, the upper spike teeth 25 located on the same upper stirring roller 21 can be spirally distributed, or two connected upper spike teeth 25 can be distributed perpendicularly to each other.

[0038] When the thrust reverser blade 23 has a helical blade structure, the upper spike tooth 25 is located in the middle of the pitch. When the thrust reverser blade 23 has a straight plate structure, the upper spike tooth 25 is located on the side of the thrust reverser blade 23.

[0039] Example 7 like Figure 7 Based on Examples 1-6, each upper nail tooth 25 is a straight rod structure, or each upper nail tooth 25 is a curved rod structure (e.g., one end of the upper nail tooth 25 is fixedly connected to the upper stirring roller 21, and the other end extends away from the upper stirring roller 21 and forms an obtuse angle with one end), or some upper nail teeth 25 are straight rod structures, and the others are curved rod structures.

[0040] The material is thrown up by using the upper spike teeth 25 of different shapes, thereby improving the cleaning effect.

[0041] Example 8 like Figure 6 Based on embodiments 1-7, the two upper augers 2 are located on the same plane, and the plane where the lower auger 3 is located is lower than the plane where the upper auger 2 is located. The distances from the lower auger 3 and the two upper augers 2 to the bottom of the housing 1 are all equal.

[0042] The beneficial effects of the preferred scheme in the above embodiments are that the first cleaning channel and the second cleaning channel are located at the same plane height, so as to ensure that the mixture of husks and grains has sufficient cleaning time at the two upper augers 2. Compared with the overall inclined state of the three channels, the cleaning time is longer. At the same time, the height of the third cleaning channel is lower than that of the second cleaning channel, so that the material discharged by the upper auger 2 can be discharged to the third cleaning channel in a timely and sufficient manner and cleaned by the lower auger 3, reducing blockage and improving cleaning efficiency.

[0043] Example 9 like Figures 1-3Based on embodiments 1-8, a partition 11 is fixedly connected to the upper opening of the housing 1, the lower auger 3 is located inside the partition 11, and a feed inlet 111 is provided through the side wall of the partition 11. The feed inlet 111 opens towards the end of the adjacent push blade 22 and the reverse push blade 23 that are fixedly connected to each other, and the feed inlet 111 and the discharge port are respectively close to the head and tail ends of the lower auger 3.

[0044] The beneficial effect of adopting the preferred solution in the above embodiments is that, during the cleaning process, the shroud 11 isolates the lower auger 3 and the upper auger 2, leaving only the feed inlet 111 for communication, so as to prevent the material from falling into the lower auger 3 without being cleaned by the upper auger 2, thus ensuring the cleaning effect. At the same time, the discharge port is far away from the feed inlet 111, so as to ensure that the material entering the third cleaning channel through the feed inlet 111 undergoes sufficient cleaning at the lower auger 3.

[0045] Based on the above embodiments, such as Figure 3 and Figure 4 The lower auger 3 and the two upper augers 2 rotate in the same direction, and the two upper augers 2 rotate at the same speed. The lower auger 3 rotates at a higher speed than the two upper augers 2.

[0046] The three augers rotate at the same speed to ensure that the material added to the first cleaning channel can be cleaned smoothly under the push of the two upper augers 2 and the lower auger 3, and that the husks are discharged from the discharge port. At the same time, the lower auger 3 rotates at a higher speed, so that the material entering the lower auger 3 from the upper auger 2 can quickly enter the third cleaning channel to prevent blockage and ensure smooth material discharge.

[0047] Based on the above embodiments, the auger cleaning structure of this utility model further includes a first sprocket mechanism 4, a transmission sprocket mechanism 5, and a second sprocket mechanism 6. The first sprocket mechanism 4 and the second sprocket mechanism 6 are respectively connected to a driving device (such as a motor). One of the sprockets of the first sprocket mechanism 4 is coaxially fixedly connected to the end of one of the upper stirring rollers 21, and the transmission sprocket mechanism 5 is simultaneously driven to the ends of both upper stirring rollers 21, so that under the drive of the corresponding driving device, the two upper augers 2 rotate synchronously through the transmission of the first sprocket mechanism 4 and the transmission sprocket mechanism 5. One of the sprockets of the second sprocket mechanism 6 is coaxially fixedly connected to the end of the lower stirring roller 31 of the lower auger 3, so that under the drive of the corresponding driving device, the lower auger 3 rotates through the transmission of the second sprocket mechanism 6.

[0048] The first sprocket mechanism 4, the transmission sprocket mechanism 5, and the second sprocket mechanism 6 can all adopt existing sprocket mechanisms, each of which includes two sprockets and a transmission chain tensioned by the two sprockets.

[0049] Based on the above embodiments, such as Figure 3 and Figure 4The lower auger 3 includes a lower stirring roller 31 rotatably connected to the housing 1, a discharge blade 32 spirally fixedly connected to one end of the lower stirring roller 31, multiple lower nail teeth 33 fixedly connected to the lower stirring roller 31 at intervals, and a throwing plate 34 fixedly connected to the other end of the lower stirring roller 31. The discharge blade 32 is adjacent to the end of the push blade 22 and the reverse push blade 23 that are fixedly connected to each other. The throwing plate 34 and the discharge port are located in the same vertical direction.

[0050] When the material enters the third cleaning channel from the second cleaning channel, the rotating discharge blades 32 push the material toward the discharge port. The material entering the middle of the lower stirring roller 31 is pushed by the rotating lower nail teeth 33, which makes the husks fully dispersed and further separates the grains. The separated husks are discharged from the discharge port under continuous pushing.

[0051] Furthermore, the lower nail tooth 33 can be a straight rod structure or a curved rod structure (e.g., one end is fixedly connected to the lower stirring roller 31, and the other end extends away from the lower stirring roller 31, forming an obtuse angle with one end of the rod). Based on the above embodiments, such as Figure 3 and Figure 4 Each lower nail tooth 33 is arranged at intervals along the length of the lower stirring roller 31, and multiple rows are arranged at intervals around the lower stirring roller 31. The lower auger 3 also includes multiple anti-tangling plates 35 that are fixedly connected to the lower stirring roller 31. Each anti-tangling plate 35 is fixedly connected to the root of each lower nail tooth 33 in each row, and the length of each lower nail tooth 33 is greater than the width of the corresponding anti-tangling plate 35.

[0052] During the process of the rotating lower nail tooth 33 moving the bracts, the anti-tangling plate 35 can prevent the bracts from getting tangled on the lower nail tooth 33, so as to ensure that the cleaned bracts are pushed to the discharge port in time, and the rotating anti-tangling plate 35 can also pick up the bracts at the same time.

[0053] The length of each lower nail tooth 33 is no greater than the width of the corresponding anti-tangle plate 35.

[0054] Example 10 This utility model also provides a corn harvester, including the auger cleaning structure as described in Examples 1-9.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A screw conveyor cleaning structure, comprising a shell (1) with an upward opening, wherein a discharge port and a plurality of screen holes are provided through the bottom of the shell (1), and a first cleaning channel, a second cleaning channel, and a third cleaning channel are provided inside the shell (1) in sequence and all connected to the screen holes, wherein the tail end of the third cleaning channel is connected to the discharge port, characterized in that, Also includes: There are two upper augers (2) arranged in parallel and located in the first cleaning channel and the second cleaning channel respectively. Each of the two upper augers (2) includes an upper stirring roller (21) rotatably connected to the housing (1), a pushing blade (22) spirally wound around one end of the upper stirring roller (21), and a reverse pushing blade (23) fixedly connected to the other end of the upper stirring roller (21). The lower auger (3) is rotatably connected to the housing (1) and located in the third cleaning channel.

2. The auger cleaning structure according to claim 1, characterized in that, Each of the thrust blades (23) has a spiral structure, and the spiral direction is opposite to that of the corresponding thrust blade (22).

3. The auger cleaning structure according to claim 2, characterized in that, Both of the upper augers (2) further include scrapers (24), which are located between the push blades (22) and the corresponding reverse blades (23), and the scrapers (24) are fixedly connected to the upper agitator (21) and / or the push blades (22) and / or the reverse blades (23).

4. The auger cleaning structure according to claim 1, characterized in that, Each of the thrust blades (23) is a straight plate structure and extends along the axial direction of the corresponding upper agitator (21).

5. The auger cleaning structure according to claim 1, characterized in that, Both of the upper augers (2) further include multiple upper spike teeth (25), each of the upper spike teeth (25) being spaced apart from the corresponding upper agitator (21), and spaced apart from the corresponding pusher blade (22) and / or the reverse thrust blade (23).

6. The auger cleaning structure according to claim 5, characterized in that, At least one upper spike tooth (25) is provided at the middle position of the pitch of each of the push blades (22) and / or at the corresponding position of each of the reverse thrust blades (23).

7. The auger cleaning structure according to claim 5, characterized in that, Each of the upper nail teeth (25) is a straight rod structure, or each of the upper nail teeth (25) is a curved rod structure, or some of the upper nail teeth (25) are straight rod structures, and the others are curved rod structures.

8. The auger cleaning structure according to claim 1, characterized in that, The two upper augers (2) are located on the same plane, and the plane where the lower auger (3) is located is lower than the plane where the upper augers (2) are located. The distances from the lower auger (3) and the two upper augers (2) to the bottom of the shell (1) are all equal.

9. The auger cleaning structure according to claim 1, characterized in that, A shroud (11) is fixedly connected to the upper opening of the housing (1). The lower auger (3) is located inside the shroud (11), and the side wall of the shroud (11) is provided with a feed inlet (111). The feed inlet (111) opens towards the end of the adjacent push blade (22) and the reverse push blade (23) which are fixedly connected to each other. The feed inlet (111) and the discharge port are respectively close to the head and tail ends of the lower auger (3).

10. A corn harvester, characterized in that, Includes the screw conveyor cleaning structure as described in any one of claims 1-9.

Images