Edge sealing and cutting equipment for sound insulation cotton production

Abstract

The utility model belongs to the technical field of sound insulation cotton production, and particularly relates to edge sealing and cutting equipment for sound insulation cotton production, which comprises a workbench, a cutting and edge sealing assembly, a driving mechanism and a rolling assembly, a cutting blade; an edge band; the two L-shaped plates are symmetrically distributed, the vertical parts of the L-shaped plates correspond to the cutting knife, the edge sealing strip is fixed between the horizontal parts of the two L-shaped plates, and kidney-shaped holes are formed in the vertical parts of the L-shaped plates; the third locking bolt penetrates through the kidney-shaped hole and then is fixedly connected with the cutting knife in a threaded screwing mode. According to the sound insulation cotton cutting and edge sealing device, the edge sealing strip is fixedly installed through the L-shaped plate, the initial height of the edge sealing strip can be adjusted under the cooperation of the kidney-shaped hole and the third locking bolt, namely, the distance between the edge sealing strip and the cutting edge at the bottom end of the cutting knife is adjustable, and the cutting and edge sealing requirements of sound insulation cotton with different thicknesses are met; and the reliability of cutting and edge sealing is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sound insulation cotton production, and particularly relates to an edge-sealing and cutting device for sound insulation cotton production. Background Technique

[0002] The sound insulation cotton has good heat insulation effect. After being pasted inside the car hood, it can effectively prevent the high temperature of the engine from directly transferring to the hood. At the same time, in rainy days and winter, due to the large temperature difference between the external temperature and the engine, and the combined action of rainwater scouring the hood, etc., it will accelerate the oxidation of the paint surface. The sound insulation cotton effectively insulates heat to avoid the oxidation of the paint on the hood surface, and at the same time avoids the influence of the foggy hood on the line of sight in rainy days.

[0003] In the production and processing of sound insulation cotton, an edge-sealing and cutting device is needed to cut the sound insulation cotton blank into a suitable size and seal the cutting position.

[0004] It is retrieved that in the prior art, the Chinese utility model patent with the authorization announcement number CN219854749U discloses "an edge-sealing and cutting device for sound insulation cotton production", which includes a base. A glass plate is arranged on the top of the base. A first conveyor belt is arranged on the base. A second conveyor belt is arranged in front of the first conveyor belt. A guide bar is arranged above the first conveyor belt. An installation plate is arranged on the side of the guide bar. An adjusting piece is arranged at the end of the first conveyor belt. A pressing conveyor belt is arranged above the second conveyor belt. A cutting device is arranged behind the top plate. A pressing wheel is arranged at the end of the second conveyor belt.

[0005] For the edge-sealing and cutting devices in the prior art including the above, although they can cut sound insulation cotton of different models, the relative positions of the cutting knife and the edge-sealing strip are fixed, that is, the distance between the edge-sealing strip and the bottom edge of the cutting knife is not adjustable. When cutting sound insulation cotton of different thicknesses, the edge-sealing effect is not good.

[0006] To solve the above problems, an edge-sealing and cutting device for sound insulation cotton production is proposed in this application. Utility Model Content

[0007] To solve the above problems existing in the prior art, the utility model provides an edge-sealing and cutting device for sound insulation cotton production, which has the characteristics of convenient use, easy adjustment and good edge-sealing effect.

[0008] To achieve the above purpose, the utility model provides the following technical solution: An edge-sealing and cutting device for sound insulation cotton production, including a workbench, a cutting and edge-sealing assembly, a driving mechanism and a rolling and pressing assembly. Two groups of the rolling and pressing assemblies are symmetrically fixed on the workbench. The cutting and edge-sealing assembly is located above the workbench. The driving mechanism drives the cutting and edge-sealing assembly to move in the vertical direction. The cutting and edge-sealing assembly includes:

[0009] n - type frame;

[0010] Cutting knife, the cutting knife is fixed to the inner side of the n - type frame;

[0011] Edge - sealing strip, the edge - sealing strip is in sliding fit with the cutting knife;

[0012] L - shaped plate, two L - shaped plates are symmetrically distributed, and the vertical part of the L - shaped plate corresponds to the cutting knife. The edge - sealing strip is fixed between the horizontal parts of the two L - shaped plates, and there are waist - shaped holes on the vertical part of the L - shaped plate;

[0013] No. 3 locking bolt, the No. 3 locking bolt passes through the waist - shaped hole and is fixedly connected to the cutting knife by screw thread engagement.

[0014] As a preferred technical solution of the present utility model, the cutting and edge - sealing assembly further includes:

[0015] No. 2 locking bolt, the No. 2 locking bolt passes through the horizontal part of the L - shaped plate and is fixedly connected to the edge - sealing strip by screw thread engagement.

[0016] As a preferred technical solution of the present utility model, the cutting and edge - sealing assembly further includes:

[0017] No. 1 locking bolt, a plurality of No. 1 locking bolts are equally spaced, and the No. 1 locking bolt passes through the n - type frame and the cutting knife;

[0018] Locking nut, the locking nut is installed on the protruding end of the No. 1 locking bolt by screw thread engagement.

[0019] As a preferred technical solution of the present utility model, the driving mechanism includes:

[0020] No. 1 side plate, two No. 1 side plates are symmetrically distributed;

[0021] No. 1 top plate, the No. 1 top plate is fixed to the top end of the No. 1 side plate;

[0022] No. 1 vertical cylinder, the No. 1 vertical cylinder is fixed on the No. 1 top plate, and the piston rod of the No. 1 vertical cylinder passes through the No. 1 top plate and is fixedly connected to the n - type frame.

[0023] As a preferred technical solution of the present utility model, the driving mechanism further includes:

[0024] No. 1 guide post, two No. 1 guide posts are symmetrically fixed on the n - type frame, and the No. 1 guide post passes through the No. 1 top plate.

[0025] As a preferred technical solution of the present utility model, it further includes an adjustment mechanism, and the adjustment mechanism is used to adjust the horizontal position of the first side plate, and the adjustment mechanism includes:

[0026] A guiding slide rail, the guiding slide rail is fixed on the workbench, and there is a guiding chute on the guiding slide rail;

[0027] A guiding slider, the guiding slider is fixed at the bottom end of the first side plate, and the guiding slider is embedded in the guiding chute;

[0028] A threaded lead screw, the threaded lead screw is rotatably installed in the guiding chute, and the threaded lead screw penetrates through the guiding slider and is connected to the guiding slider in a threaded engagement manner;

[0029] A driving motor, the driving motor is fixed at the end of the guiding slide rail and is used to drive the threaded lead screw to rotate.

[0030] As a preferred technical solution of the present utility model, the roll pressing assembly includes:

[0031] An n-shaped lifting frame;

[0032] A pressing roller, the pressing roller is rotatably installed in the n-shaped lifting frame;

[0033] A servo motor, the servo motor is fixed at the end of the n-shaped lifting frame and is used to drive the pressing roller to rotate;

[0034] Second side plates, two of the second side plates are symmetrically fixed on the workbench;

[0035] A second top plate, the second top plate is fixed at the top end of the second side plates;

[0036] A second vertical cylinder, the second vertical cylinder is fixed on the second top plate, and the piston rod of the second vertical cylinder penetrates through the second top plate and is fixedly connected to the n-shaped lifting frame.

[0037] As a preferred technical solution of the present utility model, the roll pressing assembly further includes:

[0038] Second guiding columns, two of the second guiding columns are symmetrically fixed on the n-shaped lifting frame, and the second guiding columns penetrate through the second top plate.

[0039] Compared with the prior art, the beneficial effects of the present utility model are:

[0040] In the present utility model, the edge banding strip is fixedly installed through the provided L-shaped plate. With the cooperation of the waist-shaped hole and the No. 3 locking bolt, the initial height of the edge banding strip can be adjusted, that is, the distance between the edge banding strip and the bottom edge of the cutting blade is adjustable, meeting the cutting and edge banding requirements of sound insulation cotton with different thicknesses and ensuring the reliability of cutting and edge banding.

[0041] Other additional advantages and beneficial effects of this application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of this application. Brief Description of the Drawings

[0042] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0043] Figure 1 is a schematic structural view of the present utility model;

[0044] Figure 2 is an axonometric structural view of the cutting and edge banding assembly in the present utility model;

[0045] Figure 3 is the present utility model Figure 2 is an enlarged structural view of part A in the present utility model;

[0046] Figure 4 is an axonometric structural view of the rolling assembly in the present utility model.

[0047] In the figures: 1, workbench; 2, cutting and edge banding assembly; 21, n-shaped frame; 22, cutting blade; 23, edge banding strip; 24, No. 1 locking bolt; 25, locking nut; 26, L-shaped plate; 261, waist-shaped hole; 27, No. 2 locking bolt; 28, No. 3 locking bolt; 3, driving mechanism; 31, No. 1 side plate; 32, No. 1 top plate; 33, No. 1 vertical cylinder; 34, No. 1 guiding column; 4, adjusting mechanism; 41, guiding slide rail; 411, guiding chute; 42, guiding slider; 43, threaded lead screw; 44, driving motor; 5, rolling assembly; 51, n-shaped lifting frame; 52, pressing roller; 53, servo motor; 54, No. 2 side plate; 55, No. 2 top plate; 56, No. 2 vertical cylinder; 57, No. 2 guiding column. Detailed Embodiment

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0049] Please refer to Figures 1-4 , the present utility model provides the following technical solutions: An edge-sealing and cutting device for sound insulation cotton production, including a workbench 1, a cutting and edge-sealing assembly 2, a driving mechanism 3, and a rolling and pressing assembly 5. Two groups of rolling and pressing assemblies 5 are symmetrically fixed on the workbench 1. The cutting and edge-sealing assembly 2 is located above the workbench 1. The driving mechanism 3 drives the cutting and edge-sealing assembly 2 to move in the vertical direction. The cutting and edge-sealing assembly 2 includes: an n-shaped frame 21, a cutting knife 22, an edge-sealing strip 23, an L-shaped plate 26, and a third locking bolt 28.

[0050] Furthermore, as Figures 1-3 shown, in this embodiment, the cutting knife 22 is fixed inside the n-shaped frame 21. The edge-sealing strip 23 is slidably matched with the cutting knife 22. Two L-shaped plates 26 are symmetrically distributed, and the vertical part of the L-shaped plate 26 corresponds to the cutting knife 22. The edge-sealing strip 23 is fixed between the horizontal parts of the two L-shaped plates 26. There is a waist-shaped hole 261 on the vertical part of the L-shaped plate 26. The third locking bolt 28 passes through the waist-shaped hole 261 and is fixedly connected to the cutting knife 22 by means of screw thread engagement. After adopting the above solution, for sound insulation cotton with different thicknesses, before cutting, loosen the third locking bolt 28, and adjust the initial height of the edge-sealing strip 23 by adjusting the vertical height of the two ends of the L-shaped plate 26, that is, adjust the interval between the edge-sealing strip 23 and the bottom edge of the cutting knife 22 to meet the cutting and edge-sealing requirements of sound insulation cotton with different thicknesses, ensuring the reliability of cutting and edge-sealing. During cutting and edge-sealing, use the two groups of rolling and pressing assemblies 5 to press and fix the sound insulation cotton, use the driving mechanism 3 to drive the cutting and edge-sealing assembly 2 to move downward, the cutting knife 22 moves downward to cut the sound insulation cotton, and when cutting, the edge-sealing strip 23 compresses the cut position of the sound insulation cotton to seal the cut.

[0051] Optionally, as Figures 1-3 shown, in this embodiment, the cutting and edge-sealing assembly 2 further includes: a second locking bolt 27. The second locking bolt 27 passes through the horizontal part of the L-shaped plate 26 and is fixedly connected to the edge-sealing strip 23 by means of screw thread engagement. After adopting the above solution, the present utility model uses the second locking bolt 27 to fixedly install the edge-sealing strip 23, which is convenient and stable for installation, and is also easy to disassemble and maintain.

[0052] Optionally, as Figure 1 and Figure 2As shown, in this embodiment, the cutting and edge-sealing assembly 2 further includes: a first locking bolt 24 and a locking nut 25. The multiple first locking bolts 24 are equally spaced, and the first locking bolts 24 penetrate through the n-shaped frame 21 and the cutting blade 22. The locking nut 25 is installed on the protruding end of the first locking bolt 24 by means of screw thread engagement. After adopting the above solution, the utility model uses the first locking bolt 24 and the locking nut 25 to fixedly install the cutting blade 22, which is convenient and stable to install, and is also easy to disassemble and maintain.

[0053] Optionally, Figure 1 As shown, in this embodiment, the driving mechanism 3 includes: a first side plate 31, a first top plate 32, and a first vertical cylinder 33. The two first side plates 31 are symmetrically distributed. The first top plate 32 is fixed to the top end of the first side plates 31. The first vertical cylinder 33 is fixed on the first top plate 32, and the piston rod of the first vertical cylinder 33 penetrates through the first top plate 32 and is fixedly connected to the n-shaped frame 21. After adopting the above solution, when the first vertical cylinder 33 is started, the piston rod of the first vertical cylinder 33 drives the cutting and edge-sealing assembly 2 to move in the vertical direction.

[0054] Preferably, Figure 1 As shown, in this embodiment, the driving mechanism 3 further includes: a first guiding column 34. The two first guiding columns 34 are symmetrically fixed on the n-shaped frame 21, and the first guiding columns 34 penetrate through the first top plate 32. The two first guiding columns 34 provided are used to guide the cutting and edge-sealing assembly 2 to improve the stability of the cutting and edge-sealing assembly 2.

[0055] Preferably, Figure 1 As shown, in this embodiment, an adjusting mechanism 4 is further included. The adjusting mechanism 4 is used to adjust the horizontal position of the first side plate 31, and the adjusting mechanism 4 includes: a guiding slide rail 41, a guiding slider 42, a threaded lead screw 43, and a driving motor 44. The guiding slide rail 41 is fixed on the workbench 1, and a guiding chute 411 is provided on the guiding slide rail 41. The guiding slider 42 is fixed to the bottom end of the first side plate 31, and the guiding slider 42 is embedded in the guiding chute 411. The threaded lead screw 43 is rotatably installed in the guiding chute 411, and the threaded lead screw 43 penetrates through the guiding slider 42 and is connected to the guiding slider 42 by means of screw thread engagement. The driving motor 44 is fixed at the end of the guiding slide rail 41 and is used to drive the threaded lead screw 43 to rotate. After adopting the above solution, when necessary, after the two roller pressing assemblies 5 press and fix the sound insulation cotton, for the cutting position, the driving motor 44 can be started to drive the threaded lead screw 43 to rotate, so that the guiding slider 42 drives the first side plate 31 to move under the screw thread engagement effect, for adjusting the horizontal position of the cutting and edge-sealing assembly 2 to achieve cutting at different positions, without adjusting the position of the sound insulation cotton, ensuring the cutting accuracy.

[0056] Optionally, Figure 1and Figure 4 As shown in Figure 4 , in this embodiment, the roll pressing assembly 5 includes an n-shaped lifting frame 51, a pressing roller 52, a servo motor 53, a second side plate 54, a second top plate 55, and a second vertical cylinder 56. The pressing roller 52 is rotatably installed in the n-shaped lifting frame 51. The servo motor 53 is fixed at the end of the n-shaped lifting frame 51 and is used to drive the pressing roller 52 to rotate. Two second side plates 54 are symmetrically fixed on the workbench 1. The second top plate 55 is fixed to the top of the second side plates 54. The second vertical cylinder 56 is fixed on the second top plate 55, and the piston rod of the second vertical cylinder 56 penetrates through the second top plate 55 and is fixedly connected to the n-shaped lifting frame 51. After adopting the above solution, when the second vertical cylinder 56 is started, the piston rod of the second vertical cylinder 56 is used to push the n-shaped lifting frame 51 downward, the n-shaped lifting frame 51 is used to drive the pressing roller 52 downward, the pressing roller 52 is used to press the sound insulation cotton tightly, the servo motor 53 is started to drive the pressing roller 52 to rotate, and the pressing roller 52 can use the frictional force to push the sound insulation cotton to move.

[0057] It should be noted that during use, both the feeding and discharging of the sound insulation cotton can be driven by the pressing roller 52. When the pressing roller 52 rotates, it can use the frictional force to push the sound insulation cotton to move. In other available embodiments, a belt conveyor can also be used to convey the sound insulation cotton, that is, the workbench 1 is replaced with a belt conveyor, and other parts remain unchanged.

[0058] Preferably, Figure 1 and Figure 4 As shown in Figure 4 , in this embodiment, the roll pressing assembly 5 further includes two second guide columns 57. The two second guide columns 57 are symmetrically fixed on the n-shaped lifting frame 51 and penetrate through the second top plate 55. The two second guide columns 57 provided are used to guide the n-shaped lifting frame 51, improving the stability of the n-shaped lifting frame 51.

[0059] It should be noted that the first vertical cylinder 33, the drive motor 44, the servo motor 53, and the second vertical cylinder 56 are all commercially available conventional devices with built-in power switches. Those skilled in the art can make conventional selections according to actual needs. Their working principles are common knowledge well-known to those skilled in the art and have been fully disclosed by the prior art, so no further elaboration will be provided herein.

[0060] The circuit connection involved in the present utility model is a common means adopted by those skilled in the art and can obtain technical inspiration through a limited number of experiments, belonging to the widely used prior art.

[0061] The components not described in detail herein are prior art.

[0062] Working principle and usage process of the present utility model: For the cutting and edge-sealing equipment of the present utility model, place the sound insulation cotton to be cut on the workbench 1, start the second vertical cylinder 56, use the piston rod of the second vertical cylinder 56 to push the n-shaped lifting frame 51 downward, drive the pressure roller 52 to move downward by using the n-shaped lifting frame 51, press the sound insulation cotton tightly by using the pressure roller 52, start the servo motor 53 to drive the pressure roller 52 to rotate, and the pressure roller 52 can push the sound insulation cotton to move by using the friction force;

[0063] When cutting and edge-sealing, start the first vertical cylinder 33, the piston rod of the first vertical cylinder 33 drives the cutting and edge-sealing assembly 2 to move downward, the cutting knife 22 moves downward to cut the sound insulation cotton, and when cutting, compact the cut position of the sound insulation cotton through the edge-sealing strip 23 to seal the cut;

[0064] For sound insulation cotton with different thicknesses, before cutting, loosen the third locking bolt 28, adjust the vertical height of the two end L-shaped plates 26 to adjust the initial height of the edge-sealing strip 23, that is, adjust the interval between the edge-sealing strip 23 and the bottom edge of the cutting knife 22, meet the cutting and edge-sealing requirements of sound insulation cotton with different thicknesses, and ensure the reliability of cutting and edge-sealing;

[0065] When necessary, after the two groups of roller pressing assemblies 5 press and fix the sound insulation cotton, for the cutting position, the driving motor 44 can be started to drive the threaded lead screw 43 to rotate, so that the guiding slider 42 drives the first side plate 31 to move under the action of screw thread engagement, for adjusting the horizontal position of the cutting and edge-sealing assembly 2 to realize cutting at different positions.

[0066] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An edge banding and cutting device for producing sound insulation cotton, comprising a workbench (1), an edge banding cutting assembly (2), a driving mechanism (3) and a rolling assembly (5), wherein two groups of the rolling assemblies (5) are symmetrically fixed on the workbench (1), the edge banding cutting assembly (2) is located above the workbench (1), and the driving mechanism (3) drives the edge banding cutting assembly (2) to move in a vertical direction, characterized in that: The cutting and edge sealing component (2) comprises: n-type rack (21); A cutting knife (22), wherein the cutting knife (22) is fixed to the inner side of the n-type frame (21); An edge banding strip (23), the edge banding strip (23) slidably cooperates with the cutting knife (22); L-shaped plates (26), two L-shaped plates (26) are symmetrically distributed, and the vertical parts of the L-shaped plates (26) correspond to the cutting blades (22), the edge banding strip (23) is fixed between the horizontal parts of the two L-shaped plates (26), and waist-shaped holes (261) are provided on the vertical parts of the L-shaped plates (26); A number three locking bolt (28), wherein the number three locking bolt (28) passes through the waist-shaped hole (261) and is fixedly connected to the cutting knife (22) by means of a threaded engagement.

2. The edge banding and cutting equipment for producing sound insulation cotton according to claim 1 is characterized in that: The cutting and edge sealing component (2) further comprises: A second locking bolt (27), wherein the second locking bolt (27) penetrates the horizontal portion of the L-shaped plate (26) and is fixedly connected to the edge banding strip (23) by means of a threaded engagement.

3. The edge banding and cutting equipment for producing sound insulation cotton according to claim 1, characterized in that: The cutting and edge sealing component (2) further comprises: A number one locking bolt (24), wherein a plurality of the number one locking bolts (24) are distributed at equal intervals, and the number one locking bolts (24) penetrate the n-shaped frame (21) and the cutting knife (22); A locking nut (25), wherein the locking nut (25) is mounted on the protruding end of the No. 1 locking bolt (24) by means of a threaded engagement.

4. The edge banding and cutting equipment for producing sound insulation cotton according to claim 1, characterized in that: The driving mechanism (3) comprises: A first side plate (31), wherein the two first side plates (31) are symmetrically distributed; A first top plate (32), the first top plate (32) being fixed to the top end of the first side plate (31); A number one vertical cylinder (33), the number one vertical cylinder (33) being fixed on the number one top plate (32), and a piston rod of the number one vertical cylinder (33) passing through the number one top plate (32) and then being fixedly connected to the n-shaped frame (21).

5. The edge banding and cutting equipment for producing sound insulation cotton according to claim 4 is characterized in that: The driving mechanism (3) further comprises: A number one guide column (34), wherein two number one guide columns (34) are symmetrically fixed on the n-shaped frame (21), and the number one guide columns (34) penetrate the number one top plate (32).

6. The edge banding and cutting equipment for producing sound insulation cotton according to claim 4, characterized in that: It also includes an adjustment mechanism (4), the adjustment mechanism (4) being used to adjust the horizontal position of the first side plate (31), and the adjustment mechanism (4) comprising: A guide rail (41), the guide rail (41) being fixed on the workbench (1), and having a guide groove (411) on the guide rail (41); A guide slider (42), wherein the guide slider (42) is fixed to the bottom end of the first side plate (31), and the guide slider (42) is embedded in the guide slide groove (411); a threaded screw (43), the threaded screw (43) being rotatably mounted in the guide slide groove (411), and the threaded screw (43) passing through the guide slide block (42) and being connected to the guide slide block (42) by means of a threaded engagement; A drive motor (44) is fixed to the end of the guide rail (41) and is used to drive the threaded screw (43) to rotate.

7. The edge banding and cutting equipment for producing sound insulation cotton according to claim 1, characterized in that: The rolling assembly (5) comprises: n-type lifting frame (51); A pressure roller (52), the pressure roller (52) being rotatably mounted in the n-shaped lifting frame (51); a servo motor (53), the servo motor (53) being fixed to an end of the n-shaped lifting frame (51) and being used for driving the pressing roller (52) to rotate; A second side plate (54), wherein two second side plates (54) are symmetrically fixed on the workbench (1); A second top plate (55), the second top plate (55) being fixed to the top end of the second side plate (54); A No. 2 vertical cylinder (56), wherein the No. 2 vertical cylinder (56) is fixed on the No. 2 top plate (55), and a piston rod of the No. 2 vertical cylinder (56) passes through the No. 2 top plate (55) and is fixedly connected to the N-type lifting frame (51).

8. The edge banding and cutting equipment for producing sound insulation cotton according to claim 7, characterized in that: The rolling assembly (5) further comprises: A No. 2 guide column (57), wherein two No. 2 guide columns (57) are symmetrically fixed on the N-shaped lifting frame (51), and the No. 2 guide columns (57) penetrate the No. 2 top plate (55).

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