CN111229873A - Full-automatic mouth of pipe trimmer of U type copper pipe - Google Patents
Full-automatic mouth of pipe trimmer of U type copper pipe Download PDFInfo
- Publication number
- CN111229873A CN111229873A CN201910584944.0A CN201910584944A CN111229873A CN 111229873 A CN111229873 A CN 111229873A CN 201910584944 A CN201910584944 A CN 201910584944A CN 111229873 A CN111229873 A CN 111229873A
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- Prior art keywords
- fixed
- copper pipe
- plate
- shaped
- shaping
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 54
- 239000010949 copper Substances 0.000 title claims abstract description 54
- 238000007493 shaping process Methods 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 42
- 238000005192 partition Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Automatic Assembly (AREA)
Abstract
The full-automatic pipe orifice shaping machine for the U-shaped copper pipe comprises a rack, wherein the rack consists of a rectangular frame body, support plates extending upwards are formed on the side frames at the two sides of the right end of the rack, a crankshaft is arranged between the support plates, the two ends of the crankshaft are hinged to the support plates of the rack through bearings, one end of the crankshaft penetrates through a support plate inserting sleeve and is fixed with a driven belt wheel, the driven belt wheel is connected with a driving belt wheel through a transmission belt, the driving belt wheel inserting sleeve is fixed on a rotating shaft of a motor, and the motor is fixed; this equipment can realize the plastic of orificium on the U type copper pipe automatically, the effectual plastic efficiency that has improved, and indirect can improve production output, reduced personnel's cost.
Description
The technical field is as follows:
the invention relates to the technical field of copper pipe production equipment, in particular to a full-automatic pipe orifice shaping machine for a U-shaped copper pipe.
Background art:
the U-shaped copper pipe is a common pipe connecting piece in the existing refrigerating system, the U-shaped copper pipe is generally formed by bending a linear copper pipe, after the bending process is finished, pipe fittings where two pipe orifices are arranged on the U-shaped copper pipe need to be shaped, the two pipe orifices on the U-shaped copper pipe are parallel, the center distance between the pipe orifices meets the production requirement, and therefore the connection of pipelines in the refrigerating system is facilitated; the existing U-shaped copper pipe is generally shaped by manually utilizing a die, the shaping efficiency is low, and automatic equipment is required to replace manual shaping.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a full-automatic U-shaped copper pipe orifice shaping machine which can automatically shape an upper pipe orifice of a U-shaped copper pipe.
The full-automatic pipe orifice shaping machine for the U-shaped copper pipe comprises a rack, wherein the rack consists of a rectangular frame body, support plates extending upwards are formed on the side frames at the two sides of the right end of the rack, a crankshaft is arranged between the support plates, the two ends of the crankshaft are hinged to the support plates of the rack through bearings, one end of the crankshaft penetrates through a support plate inserting sleeve and is fixed with a driven belt wheel, the driven belt wheel is connected with a driving belt wheel through a transmission belt, the driving belt wheel inserting sleeve is fixed on a rotating shaft of a motor, and the motor is fixed;
the crankshaft is hinged with a connecting rod, the other end of the connecting rod is fixedly connected with a connector, the connector is hinged with a sliding seat through a hinged shaft, the sliding seat is fixed on a first sliding plate, two sides of the first sliding plate are inserted into first guide rails, and the first guide rails are fixed on the inner side wall of the rack; a linkage block is fixed on the upper end face of the sliding seat, a strip-shaped linkage plate is fixed on the linkage block, the other end of the linkage plate is fixed on a second sliding plate, two sides of the second sliding plate are inserted into second guide rails, the second guide rails are fixed on two sides of a shaping platform, and the shaping platform is fixed on the upper end face of the left end of the rack;
a rectangular slot is formed in the second sliding plate, a positioning groove is formed in the second sliding plate on the left side of the slot, a push plate is fixedly inserted into the positioning groove of the second sliding plate in a splicing manner, a U-shaped notch is formed in the left side of the upper end face of the push plate, a rectangular material guide seat is abutted against the upper end face of the push plate and is fixed on the support plate, two sides of the support plate are fixed on the second guide rail, and a copper pipe feeding channel is fixedly connected to the material guide seat; a shaping module, a sliding block, a fixed block and a material ejecting block are inserted into the slot of the second sliding plate, the shaping module is fixed on the shaping platform, two die holes opposite to the notch on the push plate are formed in the shaping module, and a material discharging groove is formed in the shaping platform on the right side of the shaping module; the fixed block is positioned on the left side of the shaping module and fixed on the shaping platform, two ejector rods are inserted into the fixed block, the right ends of the ejector rods are inserted and fixed on the sliding block, two ejector rods are inserted and fixed on the sliding block, and the ejector rods are inserted and fixed in the die holes of the shaping module; the material ejecting block is opposite to the material ejecting rod and is positioned on the left side of the material ejecting rod, the material ejecting block is fixed on the supporting rod, and the supporting rod is fixed on the second sliding plate.
Preferably, the motor is located under the crankshaft, and a cover plate is fixed at the top end of the support plate.
Preferably, a rectangular slot is formed in the sliding seat, the left end of the connector is inserted into the slot of the sliding seat, and two ends of the hinge shaft on the connector are inserted into the side wall of the slot of the sliding seat.
Preferably, the guide seat is a rectangular block, a U-shaped guide chute penetrating through the lower end face of the block is formed in the upper end face of the block, the copper pipe feeding channel is arc-shaped, the cross section of the copper pipe feeding channel is Contraband-shaped, two side edges of the copper pipe feeding channel are bent and formed to have flanges, and a groove cavity in the copper pipe feeding channel is communicated with the U-shaped guide chute of the guide seat.
Preferably, a vertical partition plate is formed in the U-shaped guide chute of the guide seat, a circular arc-shaped guide rod is fixed on the upper end surface of the partition plate, and the guide rod is inserted into the copper pipe feeding channel.
Preferably, a hole expansion is formed at the left end of the die hole in the shaping module.
Preferably, the supporting rod is parallel to the second guide rail, a strip-shaped adjusting groove is formed in the supporting rod, a plurality of bolts are inserted in the adjusting groove of the supporting rod, and the bolts are in threaded connection with the second sliding plate.
The invention has the beneficial effects that:
this equipment can realize the plastic of orificium on the U type copper pipe automatically, the effectual plastic efficiency that has improved, and indirect can improve production output, reduced personnel's cost.
Description of the drawings:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic perspective view of another embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at B;
fig. 6 is a schematic bottom view of the present invention.
In the figure: 1. a frame; 1a, a machine leg; 1b, a support plate; 1c, a material frame inlet and outlet; 2. a crankshaft; 3. a driven pulley; 4. a transmission belt; 5. a driving pulley; 6. a motor; 7. a connecting rod; 8. a connector; 9. a shaping module; 9a, a die hole; 9b, reaming; 10. a sliding seat; 11. a first slide plate; 12. a first guide rail; 13. a linkage block; 14. a linkage plate; 15. a second slide plate; 15a, a slot; 16. a shaping platform; 16a, a discharge groove; 17. a second guide rail; 18. pushing the plate; 18a, notches; 19. a mounting plate; 20. a material guide seat; 21. a copper pipe feed channel; 22. a material pushing rod; 23. a slider; 24. a fixed block; 25. a lifter bar; 26. a material ejection block; 27. a strut; 27a, an adjustment groove; 28. a bolt; 29. a cover plate;
the specific implementation mode is as follows:
example (b): as shown in fig. 1 to 6, the full-automatic pipe orifice shaping machine for the U-shaped copper pipe comprises a frame 1, wherein the frame 1 is composed of a rectangular frame body, support plates 1b extending upwards are formed on the side frames at the right end of the frame 1, a crankshaft 2 is arranged between the support plates 1b, two ends of the crankshaft 2 are hinged to the support plates 1b of the frame 1 through bearings, one end of the crankshaft 2 penetrates through the support plates 1b and is fixedly provided with a driven belt pulley 3 in an inserting way, the driven belt pulley 3 is connected with a driving belt pulley 5 through a transmission belt 4, the driving belt pulley 5 is fixedly inserted in a rotating shaft of a motor 6, and the motor 6 is fixedly;
the crankshaft 2 is hinged with a connecting rod 7, the other end of the connecting rod 7 is fixedly connected with a connector 8, the connector 8 is hinged with a sliding seat 10 through a hinged shaft, the sliding seat 10 is fixed on a first sliding plate 11, two sides of the first sliding plate 11 are inserted into first guide rails 12, and the first guide rails 12 are fixed on the inner side wall of the rack 1; a linkage block 13 is fixed on the upper end face of the sliding seat 10, a strip-shaped linkage plate 14 is fixed on the linkage block 13, the other end of the linkage plate 14 is fixed on a second sliding plate 15, two sides of the second sliding plate 15 are inserted into second guide rails 17, the second guide rails 17 are fixed on two sides of a shaping platform 16, and the shaping platform 16 is fixed on the upper end face of the left end of the rack 1;
a rectangular slot 15a is formed in the second sliding plate 15, a positioning groove is formed in the second sliding plate 15 on the left side of the slot 15a, a push plate 18 is fixedly inserted into the positioning groove of the second sliding plate 15 in an inserting manner, a U-shaped notch 18a is formed in the left side of the upper end surface of the push plate 18, a rectangular material guide seat 20 is abutted against the upper end surface of the push plate 18, the material guide seat 20 is fixed on a support plate 19, two sides of the support plate 19 are fixed on a second guide rail 17, and a copper pipe feeding channel 21 is fixedly connected to the material guide seat 20; a shaping module 9, a sliding block 23, a fixed block 24 and a material ejecting block 26 are inserted into the slot 15a of the second sliding plate 15, the shaping module 9 is fixed on the shaping platform 16, two die holes 9a opposite to the notch 18a on the push plate 18 are formed on the shaping module 9, and a material discharging slot 16a is formed on the shaping platform 16 on the right side of the shaping module 9; the fixed block 24 is positioned at the left side of the shaping module 9 and fixed on the shaping platform 16, two ejector rods 25 are inserted into the fixed block 24, the right ends of the ejector rods 25 are inserted and fixed on the sliding block 23, two ejector rods 22 are inserted and fixed on the sliding block 23, and the ejector rods 22 are inserted and fixed in the die holes 9a of the shaping module 9; the material ejecting block 26 is opposite to the material ejecting rod 25 and is positioned at the left side of the material ejecting rod 25, the material ejecting block 26 is fixed on the supporting rod 27, and the supporting rod 27 is fixed on the second sliding plate 15.
Preferably, the motor 6 is located right below the crankshaft 2, and a cover plate 29 is fixed to the top end of the support plate 1 b.
Preferably, a rectangular slot is formed in the sliding seat 10, the left end of the connector 8 is inserted into the slot of the sliding seat 10, and two ends of an articulated shaft on the connector 8 are inserted into the side wall of the slot of the sliding seat 10.
Preferably, the material guiding seat 20 is a rectangular block, a U-shaped material guiding groove penetrating through the lower end face of the block is formed on the upper end face of the block, the copper pipe feeding channel 21 is arc-shaped, the cross section of the copper pipe feeding channel 21 is Contraband-shaped, two side edges of the copper pipe feeding channel 21 are bent and formed with flanges, and a groove cavity in the copper pipe feeding channel 21 is communicated with the U-shaped material guiding groove of the material guiding seat 20.
Preferably, a vertical partition plate is formed in the U-shaped guide chute of the guide seat 20, and a circular arc-shaped guide rod is fixed on the upper end surface of the partition plate and inserted into the copper pipe feed channel 21.
Preferably, the shaping module 9 is formed with a counterbore 9b at the left end of the die hole 9 a.
Preferably, the supporting rod 27 is parallel to the second guide rail 17, a strip-shaped adjusting groove 27a is formed on the supporting rod 27, a plurality of bolts 28 are inserted into the adjusting groove 27a of the supporting rod 27, and the bolts 28 are screwed on the second sliding plate 15.
Preferably, a machine leg 1a is formed on the lower end face of the machine frame 1, and a material frame inlet and outlet 1c is formed on the side wall of the machine frame 1.
The working principle is as follows: the invention relates to a full-automatic pipe orifice shaping machine for a U-shaped copper pipe, which is mainly applied to shaping the pipe orifice of the U-shaped copper pipe, realizes the parallel of copper pipes at two ends of the U-shaped copper pipe, and ensures that the center distance between the pipe orifices meets the production requirement, and the specific shaping mode is as follows:
the motor 6 realizes the rotation of the crankshaft 2 through belt transmission, the crankshaft 2 and the connecting rod 7 realize the reciprocating telescopic motion of the first sliding plate 11, and the linkage plate 14 realizes the movement of the second sliding plate 15 and the first sliding plate 11 together; when the second sliding plate 15 moves rightwards, the U-shaped copper tube in the material guide seat 20 falls into the notch 18a of the pushing plate 18, then the second sliding plate 15 moves leftwards, the pushing plate 18 pushes the U-shaped copper tube to the reshaping module 9, so that the tube opening of the U-shaped copper tube enters the die hole 9a for reshaping, the material pushing rod 22 is pushed out of the reshaping module 9, after reshaping, the second sliding plate 15 moves rightwards, the pushing plate 18 is separated from the previous U-shaped copper tube and moves to the right end to receive the next U-shaped copper tube, in the moving process, the material pushing block 26 also moves rightwards, the material pushing rod 25 is driven to move, the material pushing rod 25 drives the material pushing rod 22 to move rightwards, the previous U-shaped copper tube is pushed out of the reshaping module 9, and the pushed-out U-shaped copper tube enters the material frame from the material discharge groove 16 a.
The examples are intended to illustrate the invention, but not to limit it. The described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the present invention, and therefore, the scope of the appended claims should be accorded the full scope of the invention as set forth in the appended claims.
Claims (7)
- The utility model provides a full-automatic mouth of pipe trimmer of U type copper pipe, including frame (1), frame (1) comprises the framework of rectangle, its characterized in that: support plates (1b) extending upwards are formed on the frames on two sides of the right end of the rack (1), a crankshaft (2) is arranged between the support plates (1b), two ends of the crankshaft (2) are hinged to the support plates (1b) of the rack (1) through bearings, one end of the crankshaft (2) penetrates through the support plates (1b) and is fixedly provided with a driven belt wheel (3), the driven belt wheel (3) is connected with a driving belt wheel (5) through a transmission belt (4), the driving belt wheel (5) is fixedly sleeved on a rotating shaft of a motor (6), and the motor (6) is fixedly arranged on the rack (1);the crankshaft (2) is hinged with a connecting rod (7), the other end of the connecting rod (7) is fixedly connected with a connector (8), the connector (8) is hinged with a sliding seat (10) through a hinged shaft, the sliding seat (10) is fixed on a first sliding plate (11), two sides of the first sliding plate (11) are inserted into first guide rails (12), and the first guide rails (12) are fixed on the inner side wall of the rack (1); a linkage block (13) is fixed on the upper end face of the sliding seat (10), a strip-shaped linkage plate (14) is fixed on the linkage block (13), the other end of the linkage plate (14) is fixed on a second sliding plate (15), two sides of the second sliding plate (15) are inserted into second guide rails (17), the second guide rails (17) are fixed on two sides of a shaping platform (16), and the shaping platform (16) is fixed on the upper end face of the left end of the rack (1);a rectangular slot (15a) is formed in the second sliding plate (15), a positioning groove is formed in the second sliding plate (15) on the left side of the slot (15a), a push plate (18) is fixedly inserted into the positioning groove of the second sliding plate (15), a U-shaped notch (18a) is formed in the left side of the upper end face of the push plate (18), a rectangular guide seat (20) is abutted against the upper end face of the push plate (18), the guide seat (20) is fixed on a support plate (19), two sides of the support plate (19) are fixed on a second guide rail (17), and a copper pipe feeding channel (21) is fixedly connected to the guide seat (20); a shaping module (9), a sliding block (23), a fixed block (24) and a material pushing block (26) are inserted into a slot (15a) of the second sliding plate (15), the shaping module (9) is fixed on a shaping platform (16), two die holes (9a) opposite to a notch (18a) on the pushing plate (18) are formed in the shaping module (9), and a material discharging groove (16a) is formed in the shaping platform (16) on the right side of the shaping module (9); the shaping device is characterized in that the fixed block (24) is positioned on the left side of the shaping module (9) and fixed on the shaping platform (16), two ejector rods (25) are inserted into the fixed block (24), the right ends of the ejector rods (25) are inserted and fixed on the sliding block (23), two material pushing rods (22) are inserted and fixed on the sliding block (23), and the material pushing rods (22) are inserted and fixed in die holes (9a) of the shaping module (9); the material ejecting block (26) is opposite to the material ejecting rod (25) and is positioned on the left side of the material ejecting rod (25), the material ejecting block (26) is fixed on the supporting rod (27), and the supporting rod (27) is fixed on the second sliding plate (15).
- 2. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 1, characterized in that: the motor (6) is positioned right below the crankshaft (2), and a cover plate (29) is fixed at the top end of the support plate (1 b).
- 3. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 1, characterized in that: a rectangular slot is formed in the sliding seat (10), the left end of the connector (8) is inserted into the slot of the sliding seat (10), and two ends of a hinged shaft on the connector (8) are inserted into the side wall of the slot of the sliding seat (10).
- 4. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 1, characterized in that: the copper pipe feeding channel (21) is arc-shaped, the cross section of the copper pipe feeding channel (21) is shaped like 'Contraband', two side edges of the copper pipe feeding channel (21) are bent and formed to have flanges, and a groove cavity in the copper pipe feeding channel (21) is communicated with the U-shaped guide groove of the guide seat (20).
- 5. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 4, characterized in that: a vertical partition plate is formed in the U-shaped guide groove of the guide seat (20), a circular arc-shaped guide rod is fixed on the upper end face of the partition plate, and the guide rod is inserted into the copper pipe feeding channel (21).
- 6. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 1, characterized in that: and a reaming hole (9b) is formed at the left end of the upper die hole (9a) of the shaping module (9).
- 7. The full-automatic U-shaped copper pipe orifice shaping machine according to claim 1, characterized in that: the supporting rod (27) is parallel to the second guide rail (17), a strip-shaped adjusting groove (27a) is formed in the supporting rod (27), a plurality of bolts (28) are inserted into the adjusting groove (27a) of the supporting rod (27), and the bolts (28) are screwed on the second sliding plate (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584944.0A CN111229873B (en) | 2019-07-01 | 2019-07-01 | Full-automatic pipe orifice shaper for U-shaped copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584944.0A CN111229873B (en) | 2019-07-01 | 2019-07-01 | Full-automatic pipe orifice shaper for U-shaped copper pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111229873A true CN111229873A (en) | 2020-06-05 |
| CN111229873B CN111229873B (en) | 2024-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910584944.0A Active CN111229873B (en) | 2019-07-01 | 2019-07-01 | Full-automatic pipe orifice shaper for U-shaped copper pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111229873B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112387810A (en) * | 2021-01-19 | 2021-02-23 | 山东德日机械科技有限公司 | Pipe orifice rolling shaper |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137880A (en) * | 1996-11-07 | 1998-05-26 | Nawa Seiki Seisakusho:Kk | Manufacture of u-bend and manufacturing device thereof |
| CN202052805U (en) * | 2011-03-09 | 2011-11-30 | 浙江东峰制冷配件有限公司 | U-shaped tube shaping device |
| CN206028392U (en) * | 2016-08-30 | 2017-03-22 | 桐庐千丁科技有限公司 | Mouth of pipe plastic mechanism of short U return bend automatic molding machine of thin wall |
| CN106623500A (en) * | 2017-01-12 | 2017-05-10 | 珠海格力智能装备技术研究院有限公司 | U-shaped tube shaping mechanism and tube section processing device provided with same |
| CN206854391U (en) * | 2017-06-08 | 2018-01-09 | 佛山市天凌自动化设备有限公司 | A kind of small U automatic mouldings kerf machine |
| CN210146698U (en) * | 2019-07-01 | 2020-03-17 | 绍兴市凯杰铜业有限公司 | Full-automatic mouth of pipe trimmer of U type copper pipe |
-
2019
- 2019-07-01 CN CN201910584944.0A patent/CN111229873B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137880A (en) * | 1996-11-07 | 1998-05-26 | Nawa Seiki Seisakusho:Kk | Manufacture of u-bend and manufacturing device thereof |
| CN202052805U (en) * | 2011-03-09 | 2011-11-30 | 浙江东峰制冷配件有限公司 | U-shaped tube shaping device |
| CN206028392U (en) * | 2016-08-30 | 2017-03-22 | 桐庐千丁科技有限公司 | Mouth of pipe plastic mechanism of short U return bend automatic molding machine of thin wall |
| CN106623500A (en) * | 2017-01-12 | 2017-05-10 | 珠海格力智能装备技术研究院有限公司 | U-shaped tube shaping mechanism and tube section processing device provided with same |
| CN206854391U (en) * | 2017-06-08 | 2018-01-09 | 佛山市天凌自动化设备有限公司 | A kind of small U automatic mouldings kerf machine |
| CN210146698U (en) * | 2019-07-01 | 2020-03-17 | 绍兴市凯杰铜业有限公司 | Full-automatic mouth of pipe trimmer of U type copper pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112387810A (en) * | 2021-01-19 | 2021-02-23 | 山东德日机械科技有限公司 | Pipe orifice rolling shaper |
| CN112387810B (en) * | 2021-01-19 | 2021-03-23 | 山东德日机械科技有限公司 | Pipe orifice rolling shaper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111229873B (en) | 2024-06-18 |
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