CN109591359B - Closed double-point press - Google Patents
Closed double-point press Download PDFInfo
- Publication number
- CN109591359B CN109591359B CN201910083983.2A CN201910083983A CN109591359B CN 109591359 B CN109591359 B CN 109591359B CN 201910083983 A CN201910083983 A CN 201910083983A CN 109591359 B CN109591359 B CN 109591359B
- Authority
- CN
- China
- Prior art keywords
- shaft
- component
- protective guard
- rack
- balance cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000011664 signaling Effects 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 23
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000001174 ascending effect Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 3
- 244000309464 bull Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/12—Clutches specially adapted for presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P1/00—Safety devices independent of the control and operation of any machine
- F16P1/02—Fixed screens or hoods
Abstract
The invention discloses a closed double-point press machine, which comprises a rack, wherein a clutch part, a sliding block part, a balance cylinder part, a signaling part, a protective guard part and a pneumatic pipeline part are arranged on the rack, a ball head can drive a ball head cover to ascend or descend and can also keep the ball head cover not to rotate, the pressure head can ascend or descend without position deviation under the limitation of a left reinforcing plate and a right reinforcing plate, the pressure head can drive a piston rod in the balance cylinder to stretch in the ascending and descending processes, the piston rod is positioned in the balance cylinder and is connected with a sealing plate, the pressure intensity of the balance cylinder can be reduced in the extending process of the piston rod, larger and larger attractive force can be generated on the plate, and when the ball head or other parts of the sliding block part are damaged, the pressure head can still be supported, so that the pressure head is prevented from falling and damage.
Description
Technical Field
The invention relates to a press machine, in particular to a closed double-point press machine.
Background
The press machine (including punch press and hydraulic press) is a universal press machine with exquisite structure, and features extensive use and high production efficiency, and can be extensively used in the processes of cutting, punching, blanking, bending, riveting and forming, etc., and can be used for making metal produce plastic deformation and fracture to make it into component.
The position that current two point presses of closed probably leads to the product in the course of working is makeed mistakes, and is very poor to the effect of suppressing of work piece, and the press can not accomplish accurate hitting and hit, and the precision is not high, and the processing that leads to the work piece has had a large amount of shortcomings, great reduction the practicality of press.
Disclosure of Invention
The invention aims to provide a closed double-point press which has the advantages of accurate pressing and safe use and solves the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a closed double-point press comprises a frame, a clutch component, a slide block component, a balance cylinder component, a signaling component, a protective guard component and a pneumatic pipeline component are arranged on the frame, the slide block component comprises a connecting rod cover and a ball head which are sleeved on a crankshaft to rotate, the balance cylinder part comprises a balance cylinder, a lantern ring, a spherical nut and a fixed seat, the balance cylinder is respectively fixed on two side surfaces of the rack, a telescopic piston rod in the balance cylinder is connected with the lantern ring and the spherical nut, and the lantern ring and the spherical nut are arranged on the fixed seat connected with two side walls of the pressure head;
the clutch component and the pneumatic pipeline component are arranged on the top surface of the rack side by side, the clutch component comprises a motor, a crankshaft, a flywheel, a transmission shaft, a gland and an idler shaft, the motor is arranged on the rack, the transmission shaft is meshed with a motor shaft rotating in the motor, the flywheel is fixed on the outer wall of the transmission shaft through a flat key, the gland is sleeved on the joint of the flywheel and the transmission shaft, an intermediate gear is meshed on a gear on the other end of the transmission shaft, the intermediate gear is sleeved on a pinion, an idler shaft fixed on the rack penetrates through the axis of the pinion, a large gear is meshed at the bottom of the pinion, an intermediate shaft penetrates through the axis of the large gear, a shaft coupler is further sleeved outside the intermediate shaft, and two ports of the intermediate.
Furthermore, the signal sending component comprises a signal sending body, a seat shell, a chain wheel and a connecting shaft arranged in the middle shaft, the signal sending body is arranged in the seat shell on the rack, an output shaft penetrates through the signal sending body, the chain wheel is fixed on one end opening of the output shaft, and a chain sleeved on the connecting shaft is wound on the chain wheel.
Furthermore, the guard rail part comprises a safety ladder, a guard rail chassis, an upper guard rail, guard rail support legs and a lower guard rail, the safety ladder is fixed on the side wall of the rack, the guard rail chassis is laid on the protruded front face of the rack, the upper guard rail and the lower guard rail are mutually welded on the guard rail chassis and the top edge of the rack, and the guard rail support legs are welded between the upper guard rail and the lower guard rail and are separated into a plurality of rectangular frames.
Compared with the prior art, the invention has the beneficial effects that:
the closed double-point press has the advantages that the clutch component is used for starting or stopping the crankshaft of the press under the condition that the motor and the flywheel rotate ceaselessly, so that the transmission component indispensable for normal work of the press is ensured, the clutch component and the flywheel work in a closely matched and coordinated manner, the power can be cut off, the sliding block component is stopped, the ball head can not only drive the ball head cover to ascend or descend, but also can keep the ball head cover not to rotate, the pressure head can ascend and descend without position deviation under the limitation of a left reinforcing plate and a right reinforcing plate, the pressure head can drive the piston rod in the balance cylinder to stretch in the ascending and descending processes, and the piston rod is positioned in the balance cylinder and is connected with the sealed plate, so that the pressure intensity of the balance cylinder is reduced in the extending process of the piston rod, greater and greater attraction is generated to the plate, and when the ball head or other components of the sliding block, the pressure head is prevented from falling to cause harm.
Drawings
FIG. 1 is a block diagram of the clutch components of the present invention;
FIG. 2 is a block diagram of the slider component of the present invention;
FIG. 3 is a block diagram of the balance cylinder assembly of the present invention;
FIG. 4 is a block diagram of a signaling component of the present invention;
fig. 5 is a view illustrating a guard rail member of the present invention;
FIG. 6 is a schematic diagram of the pneumatic tubing component of the present invention.
In the figure: 1. a frame; 2. a clutch member; 21. a motor; 22. a crankshaft; 221. a coupling; 23. a flywheel; 24. a drive shaft; 241. an intermediate gear; 2411. a pinion gear; 25. a gland; 26. an idler shaft; 261. A bull gear; 2611. an intermediate shaft; 3. a slider member; 31. a connecting rod cover; 32. a ball head; 321. a ball head cover; 33. left and right reinforcing plates; 34. adjusting the screw rod; 35. a pressure head; 36. a connecting rod; 4. a balance cylinder component; 41. A balancing cylinder; 42. a collar; 43. a spherical nut; 44. a fixed seat; 5. a signaling component; 51. a message sending body; 511. an output shaft; 52. a seat shell; 53. a sprocket; 531. a chain; 54. a connecting shaft; 6. a guard rail member; 61. a safety ladder; 62. a protective guard chassis; 63. an upper guardrail; 64. a guardrail support leg; 65. a lower guardrail; 7. a pneumatic tubing component; 71. a clutch gas reservoir; 72. the balance cylinder gas storage tank.
Detailed Description
The technical scheme in the embodiment of the invention will be made clear below by combining the attached drawings in the embodiment of the invention; fully described, it is to be understood that the described embodiments are merely exemplary of some, but not all, embodiments of the invention and that all other embodiments, which can be derived by one of ordinary skill in the art based on the described embodiments without inventive faculty, are within the scope of the invention.
Referring to fig. 1, a closed double-point press comprises a frame 1, a clutch part 2, a slider part 3, a balance cylinder part 4, a signaling part 5, a guard rail part 6 and a pneumatic pipeline part 7 are installed on the frame 1, the clutch part 2 and the pneumatic pipeline part 7 are installed on the top surface of the frame 1 side by side, the clutch part 2 comprises a motor 21, a crankshaft 22, a flywheel 23, a transmission shaft 24, a gland 25 and an inertia wheel shaft 26 installed on the frame 1, a transmission shaft 24 is engaged on a motor shaft rotating in the motor 21, the motor 21 drives the transmission shaft 24 to rotate, the flywheel 23 is fixed on the outer wall of the transmission shaft 24 through a flat key, the rotating frequencies of the flywheel 23 sleeved on the transmission shaft 24 are the same, the gland 25 is sleeved on the joint of the flywheel 23 and the transmission shaft 24, the gland 25 fixes the positions of the flywheel and the transmission shaft 24 to prevent the looseness of connection caused, an intermediate gear 241 is engaged with a gear on the other end of the transmission shaft 24, the transmission shaft 24 drives the intermediate gear 241 to rotate similarly, the intermediate gear 241 is sleeved on a pinion 2411, the axes of the intermediate gear 241 and the pinion 2411 are on the same line, so the rotation frequency of the intermediate gear 241 and the pinion 2411 is the same, an idle wheel shaft 26 fixed on the frame 1 penetrates through the axis of the pinion 2411, the idle wheel shaft 26 drives the idle wheel shaft 26 to rotate, a bull gear 261 is engaged with the bottom of the pinion 2411, the pinion 2411 drives the bull gear 261 to rotate similarly, an intermediate shaft 2611 penetrates through the axis of the bull gear 261, a coupler 221 is further sleeved outside the intermediate shaft 2611, two ports of the intermediate shaft 2611 are respectively connected with a crankshaft 22, the intermediate shaft 2611 drives the crankshaft 22 to rotate when the bull gear 261 rotates, the coupler 221 is a common component in mechanical products and is used for connecting two shafts or a shaft and a rotating component, and in the process of transmitting motion and power, the intermediate shaft 2611 can rotate together without disengaging and changing the rotating direction and the torque, and the safety device can prevent the intermediate shaft 2611 from overloading.
The clutch component 2 is used for starting or stopping the crankshaft 22 of the press machine under the condition that the motor 21 and the flywheel 23 rotate ceaselessly, so that the transmission component which is indispensable for normal work of the press machine is ensured, the motor and the flywheel must work closely and coordinately, power can be cut off, the sliding block component 3 is stopped, the mechanical press machine mainly works by means of inertia of the flywheel 23, the flywheel 23 always needs to rotate to store energy, and a mode of frequently starting and stopping the motor cannot be adopted.
Referring to fig. 2, the slider component 3 includes a connecting rod cover 31, a ball head 32, left and right reinforcing plates 33, an adjusting screw 34, a pressing head 35 and a connecting rod 36, the connecting rod cover 3 is driven by the crankshaft 22 to rotate around a circle, the bottom end of the connecting rod cover 31 is fixed with the connecting rod 36, the connecting rod 36 is internally sleeved with the engaging adjusting screw 34, the bottom end of the adjusting screw 34 is connected with the ball head 32, the ball head 32 is sleeved and movable in the ball head cover 321 during the ascending or descending process of the adjusting screw 34, the ball head 32 moves in the ball head cover 321, the left and right reinforcing plates 33 are mounted on the inner wall of the frame 1, the ball head cover 321 passes through the left and right reinforcing plates 33 to be connected with the pressing head 35, the pressing head 35 ascends or descends, the ball head 32 can drive the ball head cover 321 to ascend or descend while keeping the ball head cover 321 from rotating, the pressing head 35 is limited by the left, and the position of the slide is not shifted by ascending and descending.
Referring to fig. 3, the balance cylinder part 4 includes a balance cylinder 41, a collar 42, a spherical nut 43 and a fixing seat 44, the balance cylinder 41 is fixed on two side surfaces of the frame 1, the collar 42 and the spherical nut 43 are connected to a telescopic piston rod in the balance cylinder 41, the collar 42 and the spherical nut 43 are mounted on the fixing seat 44 connected to two side walls of the ram 35, the ram 35 drives the piston rod in the balance cylinder 41 to extend and retract in the process of ascending and descending, and since the piston rod is connected to a sealing plate in the balance cylinder 41, the pressure of the balance cylinder 41 is reduced in the process of extending the piston rod, and an increasingly large attraction force is generated to the plate, when the ball head 32 or other parts of the slider part 3 are damaged, the ram 35 can still be supported, and the ram 35 is prevented from falling off to cause damage.
Referring to fig. 4, the signaling component 5 includes a signaling body 51, a seat shell 52, a sprocket 53 and a connecting shaft 54 installed in an intermediate shaft 2611, the signaling body 51 is installed in the seat shell 52 on the frame 1, an output shaft 511 penetrates through the signaling body 51, the sprocket 53 is fixed on one end of the output shaft 511, a chain 531 sleeved on the connecting shaft 54 is wound on the sprocket 53, the connecting shaft 54 transmits the rotating speed and the like to the output shaft 511 through the sprocket 53 in the rotating process, and the signaling body 51 detects whether the signaling body is stable or not through the rotating speed.
Referring to fig. 5, the guard rail part 6 includes a safety ladder 61, a guard rail chassis 62, an upper guard rail 63, guard rail legs 64 and a lower guard rail 65, the safety ladder 61 is fixed on the side wall of the frame 1, the guard rail chassis 62 is laid on the front surface of the frame 1, the upper guard rail 63 and the lower guard rail 65 are welded to the top edges of the guard rail chassis 62 and the frame 1, the guard rail legs 64 are welded between the upper guard rail 63 and the lower guard rail 65 to form a plurality of rectangular frames, the safety ladder 61 allows an operator to climb up, and meanwhile, the upper guard rail 63, the lower guard rail 65 and the guard rail legs 64 form a net shape to avoid dropping and protect safety.
Referring to fig. 6, the pneumatic pipeline component 7 includes a clutch gas tank 71 and a balance cylinder gas tank 72, which are connected to the gland 25 sleeved on the transmission shaft 24 through rubber pipes, the balance cylinder gas tank 72 is connected to the balance cylinder 41 through rubber pipes, and the clutch gas tank 71 and the balance cylinder gas tank 72 respectively supply gas and oil to the balance cylinder 41 and the clutch component 2, thereby ensuring the normal operation of the whole device.
In summary, in the closed double-point press, the clutch component 2 is used for starting or stopping the crankshaft 22 of the press under the condition that the motor 21 and the flywheel 23 rotate continuously, so as to ensure the transmission components which are indispensable for the normal operation of the press, but the two components must be closely matched and coordinated to work, so that the power can be cut off, so as to stop the slide block component 3, the ball head 32 can not only drive the ball head cover 321 to ascend or descend, but also can keep the ball head cover 321 from rotating, the pressure head 35 can ascend and descend under the limitation of the left and right reinforcing plates 33, so that the position deviation can not be generated, the piston rod in the balance cylinder 41 can be driven to extend and retract by the pressure head 35 in the process of ascending and descending, because the piston rod is positioned in the balance cylinder 41 and is connected with a sealing plate, the pressure of the balance cylinder 41 can be reduced in the process of extending the piston rod, larger and larger attractive force can be generated on, still can produce the holding power to pressure head 35, avoid pressure head 35 to drop, produce harm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (3)
1. A closed double-point press machine comprises a frame (1) and is characterized in that a clutch component (2), a sliding block component (3), a balance cylinder component (4), a signaling component (5), a guard rail component (6) and a pneumatic pipeline component (7) are installed on the frame (1), the sliding block component (3) comprises a connecting rod cover (31) sleeved on a crankshaft (22) to rotate, a ball head (32), a left reinforcing plate and a right reinforcing plate (33), an adjusting screw rod (34), a press head (35) and a connecting rod (36), the bottom end of the connecting rod cover (31) is fixed with the connecting rod (36), the connecting rod (36) is sleeved with the engaging adjusting screw rod (34), the bottom end of the adjusting screw rod (34) is connected with the ball head (32), the ball head (32) is sleeved in the ball head cover (321) and moves, the left reinforcing plate and the right reinforcing plate (33) are installed on the inner wall of the frame (1), the ball head cover (321) passes through the, the balance cylinder component (4) comprises a balance cylinder (41), a lantern ring (42), a spherical nut (43) and a fixed seat (44), the balance cylinder (41) is respectively fixed on two side surfaces of the rack (1), a telescopic piston rod in the balance cylinder (41) is connected with the lantern ring (42) and the spherical nut (43), and the lantern ring (42) and the spherical nut (43) are installed on the fixed seat (44) connected with two side walls of the pressure head (35);
the clutch component (2) and the pneumatic pipeline component (7) are arranged on the top surface of the rack (1) side by side, the clutch component (2) comprises a motor (21), a crankshaft (22), a flywheel (23), a transmission shaft (24), a gland (25) and an idler shaft (26) which are arranged on the rack (1), the transmission shaft (24) is meshed on a motor shaft rotating in the motor (21), the flywheel (23) is fixed on the outer wall of the transmission shaft (24) through a flat key, the gland (25) is sleeved on the joint of the flywheel (23) and the transmission shaft (24), an intermediate gear (241) is meshed on a gear on the other end of the transmission shaft (24), the intermediate gear (241) is sleeved on a pinion (2411), the idler shaft (26) fixed on the rack (1) penetrates through the shaft center of the pinion (2411), a gearwheel (261) is meshed at the bottom of the pinion (2411), the intermediate shaft (2611) penetrates through the shaft center of the gearwheel (261), the outer part of the intermediate shaft (2611) is also sleeved with a coupling (221), and two ports of the intermediate shaft (2611) are respectively connected with a crankshaft (22).
2. A closed double-point press according to claim 1, characterized in that: the signaling component (5) comprises a signaling body (51), a seat shell (52), a chain wheel (53) and a connecting shaft (54) arranged in an intermediate shaft (2611), the signaling body (51) is arranged in the seat shell (52) on the rack (1), an output shaft (511) penetrates through the signaling body (51), the chain wheel (53) is fixed on one port of the output shaft (511), and a chain (531) sleeved on the connecting shaft (54) is wound on the chain wheel (53).
3. A closed double-point press according to claim 1, characterized in that: the protective guard component (6) comprises a safety ladder (61), a protective guard chassis (62), an upper protective guard (63), protective guard support legs (64) and a lower protective guard (65), the safety ladder (61) is fixed on the side wall of the rack (1), the protective guard chassis (62) is laid on the front face of the protrusion of the rack (1), the upper protective guard (63) and the lower protective guard (65) are mutually welded on the top edges of the protective guard chassis (62) and the rack (1), and the protective guard support legs (64) are welded between the upper protective guard (63) and the lower protective guard (65) and are separated into a plurality of rectangular frames.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083983.2A CN109591359B (en) | 2019-01-25 | 2019-01-25 | Closed double-point press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083983.2A CN109591359B (en) | 2019-01-25 | 2019-01-25 | Closed double-point press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109591359A CN109591359A (en) | 2019-04-09 |
| CN109591359B true CN109591359B (en) | 2021-05-11 |
Family
ID=65966717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910083983.2A Expired - Fee Related CN109591359B (en) | 2019-01-25 | 2019-01-25 | Closed double-point press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109591359B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203879839U (en) * | 2014-05-22 | 2014-10-15 | 金丰（中国）机械工业有限公司 | Balance device of press slide |
| CN104339696A (en) * | 2014-10-11 | 2015-02-11 | 荣成锻压机床有限公司 | Cylinder body fixing device for press machine balancer |
| CN104669673A (en) * | 2015-02-03 | 2015-06-03 | 宁波郎泰机械有限公司 | Slider component for press machine |
| CN104669657A (en) * | 2015-02-03 | 2015-06-03 | 宁波郎泰机械有限公司 | Press machine |
| CN204533032U (en) * | 2015-01-23 | 2015-08-05 | 上海远都机床股份有限公司 | Closed single point high-speed blanking press compensating cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| PL70957B1 (en) * | 1971-09-11 | 1974-04-30 | ||
| CN201728856U (en) * | 2010-06-30 | 2011-02-02 | 江苏扬锻科技有限公司 | Signal transmission device of eccentric gear type closed double-point press |
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| CN203695784U (en) * | 2013-12-13 | 2014-07-09 | 嘉兴市达锋金属锻造有限公司 | Automatic injection type press machine |
| CN204367471U (en) * | 2014-12-25 | 2015-06-03 | 上海朝阳锻压机床厂有限公司 | The energy-conservation closed type single point press of high accuracy |
| CN204526200U (en) * | 2015-01-23 | 2015-08-05 | 上海远都机床股份有限公司 | Closed single point high-speed blanking press |
| CN205970058U (en) * | 2016-08-24 | 2017-02-22 | 上海远都机床股份有限公司 | Closed type single -point press |
| CN207496048U (en) * | 2017-10-31 | 2018-06-15 | 容德精机（江苏）机床有限公司 | A kind of closed double-point high-speed fine press |
| CN208321769U (en) * | 2018-04-09 | 2019-01-04 | 南京东升货架制造有限公司 | A kind of puncturing machine |
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2019
- 2019-01-25 CN CN201910083983.2A patent/CN109591359B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202991698U (en) * | 2012-11-28 | 2013-06-12 | 江苏扬力集团有限公司 | Balance cylinder piston fast installing and detaching structure |
| CN203879839U (en) * | 2014-05-22 | 2014-10-15 | 金丰（中国）机械工业有限公司 | Balance device of press slide |
| CN104339696A (en) * | 2014-10-11 | 2015-02-11 | 荣成锻压机床有限公司 | Cylinder body fixing device for press machine balancer |
| CN204533032U (en) * | 2015-01-23 | 2015-08-05 | 上海远都机床股份有限公司 | Closed single point high-speed blanking press compensating cylinder |
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| CN104669657A (en) * | 2015-02-03 | 2015-06-03 | 宁波郎泰机械有限公司 | Press machine |
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| Publication number | Publication date |
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| CN109591359A (en) | 2019-04-09 |
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