CN110616624B - Road roller - Google Patents
Road roller Download PDFInfo
- Publication number
- CN110616624B CN110616624B CN201910995609.XA CN201910995609A CN110616624B CN 110616624 B CN110616624 B CN 110616624B CN 201910995609 A CN201910995609 A CN 201910995609A CN 110616624 B CN110616624 B CN 110616624B
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- Prior art keywords
- guide
- rod
- slider
- roller
- sleeve
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/238—Wetting, cleaning or heating rolling elements, e.g. oiling, wiping, scraping
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a road roller, which comprises a frame, wherein a compression roller is rotatably arranged on the frame, a scraping mechanism for scraping the outer peripheral surface of the compression roller is also arranged on the frame, the scraping mechanism comprises a mounting frame fixedly arranged on the frame, a guide cylinder is fixedly arranged on the mounting frame, a guide rod is movably arranged in the guide cylinder, a guide wheel acting on the outer peripheral surface of the compression roller is rotatably arranged at the lower end of the guide rod, a connecting rod is hinged on the mounting frame, one end of the connecting rod is hinged on the guide rod, the other end of the connecting rod is hinged on a guide sleeve, a swinging rod is inserted in the guide sleeve, a limiting ring positioned below the guide sleeve is fixedly arranged on the swinging rod, a limiting ring spring is arranged between the limiting ring and the guide sleeve, the middle part of the connecting rod is hinged on the mounting frame, a telescopic shovel plate mechanism is arranged at one end of the swinging rod adjacent to, resulting in wear of the blade.
Description
Technical Field
The invention relates to a road roller.
Background
When the road roller rolls on a soil layer, materials such as soil clay can be adhered to the surface of the compression roller, if the adhered materials are not cleaned in time, the compaction effect and efficiency of the road roller can be greatly reduced, and therefore the compression roller of the road roller can be generally provided with a mud scraper to clean the compression roller.
For the protection compression roller does not receive the damage, prior art generally adopts the nylon mud scraper, along with going on of compaction work, the mud scraper can receive wearing and tearing and narrow down, and the clearance between mud scraper and the compression roller can the grow simultaneously for the mud scraping effect reduces.
In the prior art, an elastic part is adopted to enable a nylon mud scraper to cling to the surface of a compression roller, but the scraper always clings to the compression roller, so that the compression roller is not normally pressed, but the scraper is still abraded in the advancing process of a vehicle, and the service life of the scraper is shortened.
Disclosure of Invention
In order to make up for the defects, the invention provides the road roller which can effectively avoid sundries from being adhered to the compression roller, can automatically carry out scraping operation and can effectively prolong the service life of a shovel plate for scraping the sundries adhered to the compression roller.
The technical scheme of the invention is as follows: a road roller comprises a rack and a connecting rod, wherein a compression roller is rotatably mounted on the rack, a scraping mechanism for scraping the peripheral surface of the compression roller is further arranged on the rack, the scraping mechanism comprises a mounting frame fixedly mounted on the rack, a guide cylinder is fixedly mounted on the mounting frame, a guide rod is movably mounted in the guide cylinder, a guide wheel acting on the peripheral surface of the compression roller is rotatably mounted at the lower end of the guide rod, one end of the connecting rod is hinged on the guide rod, the other end of the connecting rod is hinged with a guide sleeve, a swinging rod is inserted in the guide sleeve, a limiting ring positioned below the guide sleeve is fixedly mounted on the swinging rod, a limiting ring spring is arranged between the limiting ring and the guide sleeve, the middle part of the connecting rod is hinged on the mounting frame, and a telescopic shovel plate mechanism is mounted at one end, close to the compression roller, of the, fixed mounting has the deflector on the mounting bracket, be equipped with the first guide way that extends towards the rotation center direction of compression roller on the deflector, the lower extreme intercommunication of first guide way has the first end of second guide way, first guide way with movable mounting has the slider in the second guide way, slider fixed mounting is in on the swinging arms, the second guide way perpendicular to first guide way, the deflector with be equipped with the extension spring between the slider, the slider motion extremely during the lower extreme of first guide way, the extension spring pulling the slider gets into the second guide way, the mounting bracket with be equipped with between the slider with the slider pushes into the automatic re-setting mechanism of the first end of second guide way.
As a preferred technical scheme, the automatic resetting mechanism includes a wheel shaft rotatably mounted on the mounting frame, an outer wheel is rotatably mounted on the wheel shaft, a wheel rim is coaxially and fixedly mounted on one side of the outer wheel, an inner wheel rim is sleeved on the wheel rim, a roller-type overrunning clutch is arranged between the inner wheel rim and the wheel rim, clockwise rotation of the outer wheel can drive clockwise rotation of the inner wheel rim, the inner wheel rim can rotate anticlockwise relative to the outer wheel, a push rod facing the slider is hinged to the inner wheel rim, an upper limit block and a lower limit block are arranged on the mounting frame, the push rod is located between the upper limit block and the lower limit block, and a push plate for pushing the slider is arranged at one end, close to the slider, of the push rod.
As the preferred technical scheme, the telescopic shovel plate mechanism comprises a sleeve fixedly installed at one end, close to the compression roller, of the oscillating rod, a jacking rod is movably installed in the sleeve, a supporting spring is arranged between the inner end of the jacking rod and the bottom of the sleeve, and a shovel plate is fixedly installed at the outer end of the jacking rod.
According to a preferable technical scheme, the sliding block comprises a mandrel fixedly installed on the swinging rod, a circular sleeve is sleeved outside the mandrel, the circular sleeve is in clearance fit with the first guide groove and the second guide groove, and the second guide groove is an arc-shaped groove.
By adopting the technical scheme, the road roller comprises a rack and a connecting rod, wherein a compression roller is rotatably arranged on the rack, a scraping mechanism for scraping the peripheral surface of the compression roller is also arranged on the rack, the scraping mechanism comprises a mounting rack fixedly arranged on the rack, a guide cylinder is fixedly arranged on the mounting rack, a guide rod is movably arranged in the guide cylinder, a guide wheel acting on the peripheral surface of the compression roller is rotatably arranged at the lower end of the guide rod, one end of the connecting rod is hinged on the guide rod, the other end of the connecting rod is hinged with a guide sleeve, a swinging rod is inserted in the guide sleeve, a limit ring positioned below the guide sleeve is fixedly arranged on the swinging rod, a limit ring spring is arranged between the limit ring and the guide sleeve, the middle part of the connecting rod is hinged on the mounting rack, and a telescopic shovel plate mechanism is arranged at one end of the swinging rod, which is adjacent to the, a guide plate is fixedly mounted on the mounting frame, a first guide groove extending towards the rotation center direction of the press roller is formed in the guide plate, the lower end of the first guide groove is communicated with the first end of a second guide groove, sliding blocks are movably mounted in the first guide groove and the second guide groove, the sliding blocks are fixedly mounted on the oscillating rod, the second guide groove is perpendicular to the first guide groove, a tension spring is arranged between the guide plate and the sliding blocks, when the sliding blocks move to the lower end of the first guide groove, the tension spring pulls the sliding blocks to enter the second guide groove, and an automatic resetting mechanism for pushing the sliding blocks into the first end of the second guide groove is arranged between the mounting frame and the sliding blocks; when the outer surface of the compression roller is adhered with soil, the guide rod is driven to move relative to the guide cylinder when the guide wheel acts on the adhered soil, thereby driving the connecting rod to swing and driving the swing rod to move, the slide block moves downwards in the first guide groove, when the slide block moves into the second guide groove, the slide block moves to the second end of the second guide groove under the action of the tension spring, the second guide groove plays a role in limiting and limits the swinging rod to move in a direction back to the press roller, thereby ensuring the distance between the swing rod and the press roll bracket, ensuring that the telescopic shovel plate mechanism can always act on the peripheral surface of the press roll to scrape off the adhered soil, driving the sliding block to move out from the second guide groove to the first guide groove by the automatic reset mechanism, therefore, the swing rod can drive the telescopic shovel plate mechanism to be far away from the compression roller, and the abrasion of the scraper plate caused by the fact that the scraper plate acts on the peripheral surface of the compression roller all the time is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a state of use reference diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of the structure at I in FIG. 1;
fig. 4 is a schematic view showing the fitting relationship between the slider and the second guide groove in the embodiment of the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, a road roller comprises a frame 1 and a connecting rod 7, a press roll 2 is rotatably mounted on the frame, a scraping mechanism for scraping the peripheral surface of the press roll is further arranged on the frame 1, the scraping mechanism comprises a mounting frame fixedly mounted on the frame 1, a guide cylinder 4 is fixedly mounted on the mounting frame, a guide rod 5 is movably mounted in the guide cylinder 4, a guide wheel 6 acting on the peripheral surface of the press roll 2 is rotatably mounted at the lower end of the guide rod 5, the middle part of the connecting rod 7 is hinged on the mounting frame, one end of the connecting rod 7 is hinged on the guide rod 5, a guide sleeve 31 is hinged at the other end of the connecting rod 7, a swing rod 8 is inserted in the guide sleeve, the guide sleeve and the swing rod are in clearance fit, so that the swing rod can move relative to the guide sleeve, a limit ring 30 positioned below the guide sleeve 31 is fixedly mounted on the swing rod, a limiting ring spring 32 is arranged between the limiting ring 30 and the guide sleeve 31, the limiting ring spring can be compressed and stretched, a telescopic shovel plate mechanism is installed at one end, close to the compression roller 2, of the oscillating rod 8, a guide plate 9 is fixedly installed on the installation frame, a first guide groove 10 extending towards the rotation center direction of the compression roller is arranged on the guide plate 9, the lower end of the first guide groove 10 is communicated with the first end of a second guide groove 12, a sliding block 11 is movably installed in the first guide groove 10 and the second guide groove 12, the sliding block 11 is fixedly installed on the oscillating rod 8, the second guide groove 12 is perpendicular to the first guide groove 10, a tension spring 13 is arranged between the guide plate 9 and the sliding block 11, and when the sliding block moves to the lower end of the first guide groove, the tension spring 13 pulls the sliding block to enter the second guide groove 12, an automatic resetting mechanism which can push the sliding block 11 into the first end of the second guide groove 12 is arranged between the mounting frame and the sliding block 11. When the outer surface of the compression roller 2 is adhered with soil, the guide wheel 6 acts on the adhered soil, the guide rod 5 is driven to move relative to the guide cylinder 4, so as to drive the connecting rod to swing, drive the guide sleeve to move, so as to drive the oscillating rod to move, the sliding block moves downwards in the first guide groove 10, when the sliding block moves to the second guide groove 12, the sliding block moves to the second end of the second guide groove under the action of the tension spring 13, the second guide groove 12 plays a limiting role, the oscillating rod 8 is limited to move in a direction back to the compression roller 2, so as to ensure the distance between the oscillating rod and the compression roller bracket, so as to ensure that the telescopic shovel plate mechanism can always act on the outer peripheral surface of the compression roller to scrape the adhered soil, the automatic resetting mechanism can drive the sliding block to move out from the second guide groove to the first guide groove, so that the oscillating rod can drive the telescopic shovel plate mechanism to be far away from the compression roller, thereby avoiding that the scraper, resulting in wear of the blade. The spacing ring spring can drive the swinging rod to move towards the guide sleeve 31, so that the swinging rod can move upwards in the first guide groove to reset. Preferably, the circular arc between the first guide groove and the second guide groove is excessive, so that the sliding block can smoothly enter the second guide groove from the first guide groove and smoothly enter the first guide groove from the second guide groove, when the guide wheel acts on the adhered soil again, the sliding block enters the second guide groove from the first guide groove again along with the oscillating rod, preferably, a return spring 33 is further arranged between the guide rod and the guide cylinder, a limit stop 34 is arranged on the guide rod, and the return spring is arranged between the limit stop and the upper end face of the guide cylinder. Connecting rod clockwise swing in this embodiment, the uide bushing compression spacing ring spring drives the swinging arms and removes in first guide way, and the slider gets into the second guide way from first guide way under the cooperation of extension spring, and when connecting rod counter-clockwise turning, the swinging arms receives the pulling force of spacing ring spring, and the slider gets into under automatic re-setting mechanism's the drive the first end of second guide way 12 to under spacing ring spring and extension spring effect, the slider gets into first guide way.
The automatic resetting mechanism comprises a wheel shaft 14 rotatably mounted on the mounting frame, an outer wheel 15 is rotatably mounted on the wheel shaft 14, a wheel rim 16 is coaxially and fixedly mounted on one side of the outer wheel 15, an inner wheel rim 17 is sleeved on the wheel rim 16, a roller type overrunning clutch is arranged between the inner wheel rim 17 and the wheel rim 16, clockwise rotation of the outer wheel 15 can drive clockwise rotation of the inner wheel rim 17, the inner wheel rim 17 can rotate anticlockwise relative to the outer wheel 15, a push rod 18 facing the sliding block is hinged to the inner wheel rim 17, an upper limiting block 27 and a lower limiting block 28 are arranged on the mounting frame, the push rod 18 is located between the upper limiting block 27 and the lower limiting block 28, and a push plate 29 used for pushing the sliding block is arranged at one end, close to the sliding block, of the push rod 18. In fig. 1 to 3 extension spring 13 is located the back of deflector to avoid extension spring 13 and push pedal 29 to take place to interfere, known roller freewheel clutch includes outer loop and star gear inner ring, is equipped with the cylinder roller between outer loop and the star gear inner ring, and known roller freewheel clutch can only turn to transmission torque according to one, can autosegregation when reverse, and roller freewheel clutch's outer loop and star gear inner ring homoenergetic are as the action wheel, and star gear inner ring fixed cover is in this embodiment outside the wheel rim, the outer loop fixed cover is in the inner peripheral surface of inner ring, the outer wheel can drive star gear inner ring clockwise turning through the wheel rim, thereby drive the outer loop clockwise turning, and the outer loop can anticlockwise rotate for the star gear inner ring moreover, thereby makes inner ring can anticlockwise rotate for the outer wheel. As shown in fig. 2, the compression roller rotates clockwise, the leading wheel acts on the soil of adhesion, the slider drives guide bar 5 and removes for guide cylinder 4, thereby drive the connecting rod swing, drive the swinging arms through the uide bushing and remove, the slider moves down in first guide way 10, get into the second guide way, and to the second end motion of second guide way, the push rod is driven by the slider effect and is followed inner ring anticlockwise rotation at this in-process, the compression roller anticlockwise rotation, the foreign steamer is used at the compression roller outer peripheral face, under the effect of friction force between foreign steamer and compression roller, foreign steamer clockwise rotation, thereby it follows inner ring clockwise rotation to drive through roller formula freewheel clutch, thereby promote the push rod and push to the slider, shift out the slider to first guide way from the second guide way.
The flexible shovel mechanism includes fixed mounting and is in the swinging arms is close to the sleeve 19 of the one end of compression roller, movable mounting has tightening rod 20 in the sleeve 19, tightening rod 20 the inner with be equipped with supporting spring 21 between the bottom of sleeve 19, tightening rod 20's outer end fixed mounting has shovel 22.
As shown in fig. 4, the sliding block includes a core shaft 23 fixedly mounted on the swing rod, a circular sleeve 24 is sleeved outside the core shaft, the circular sleeve 24 is in clearance fit with the first guide groove and the second guide groove, the second guide groove is an arc-shaped groove, and a baffle 25 is detachably and fixedly mounted at one end of the core shaft away from the swing rod, so that the baffle and the swing rod limit the transverse movement of the core shaft, and the sliding block is prevented from being separated from the first guide groove and the second guide groove. Preferably, the center of the circular arc groove coincides with the center of the press roll.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A road roller is characterized by comprising a rack and a connecting rod, wherein a compression roller is rotatably mounted on the rack, a scraping mechanism for scraping the outer peripheral surface of the compression roller is further arranged on the rack, the scraping mechanism comprises a mounting rack fixedly mounted on the rack, a guide cylinder is fixedly mounted on the mounting rack, a guide rod is movably mounted in the guide cylinder, a guide wheel acting on the outer peripheral surface of the compression roller is rotatably mounted at the lower end of the guide rod, one end of the connecting rod is hinged on the guide rod, a guide sleeve is hinged at the other end of the connecting rod, a swinging rod is inserted in the guide sleeve, a limiting ring positioned below the guide sleeve is fixedly mounted on the swinging rod, a limiting ring spring is arranged between the limiting ring and the guide sleeve, the middle part of the connecting rod is hinged on the mounting rack, and a telescopic shovel plate mechanism is mounted at one end, close to the compression roller, of, fixed mounting has the deflector on the mounting bracket, be equipped with the first guide way that extends towards the rotation center direction of compression roller on the deflector, the lower extreme intercommunication of first guide way has the first end of second guide way, first guide way with movable mounting has the slider in the second guide way, slider fixed mounting is in on the swinging arms, the second guide way perpendicular to first guide way, the deflector with be equipped with the extension spring between the slider, the slider motion extremely during the lower extreme of first guide way, the extension spring pulling the slider gets into the second guide way, the mounting bracket with be equipped with between the slider with the slider pushes into the automatic re-setting mechanism of the first end of second guide way.
2. The roller of claim 1, wherein the automatic return mechanism includes a wheel shaft rotatably mounted on the mounting frame, an outer wheel rotatably mounted on the wheel shaft, a rim coaxially and fixedly mounted on one side of the outer wheel, an inner ring sleeved on the rim, a roller-type overrunning clutch disposed between the inner ring and the rim, clockwise rotation of the outer wheel can drive clockwise rotation of the inner ring, the inner ring can rotate counterclockwise relative to the outer wheel, a push rod hinged on the inner ring and facing the slider is provided on the mounting frame, an upper limit block and a lower limit block are provided on the mounting frame, the push rod is located between the upper limit block and the lower limit block, and a push plate for pushing the slider is provided at one end of the push rod adjacent to the slider.
3. The roller of claim 1, wherein the retractable blade mechanism includes a sleeve fixedly mounted to an end of the swinging rod adjacent to the press roller, a tightening rod movably mounted in the sleeve, a support spring disposed between an inner end of the tightening rod and a bottom of the sleeve, and a blade fixedly mounted to an outer end of the tightening rod.
4. The roller of any one of claims 1 to 3, wherein the slide comprises a mandrel fixedly mounted on the sway bar, the mandrel being sheathed with a circular sleeve in clearance fit with the first and second guide grooves, the second guide groove being an arc groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995609.XA CN110616624B (en) | 2019-10-18 | 2019-10-18 | Road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995609.XA CN110616624B (en) | 2019-10-18 | 2019-10-18 | Road roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110616624A CN110616624A (en) | 2019-12-27 |
| CN110616624B true CN110616624B (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910995609.XA Active CN110616624B (en) | 2019-10-18 | 2019-10-18 | Road roller |
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| Country | Link |
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| CN (1) | CN110616624B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705579A (en) * | 2020-07-21 | 2020-09-25 | 黄江龙 | Ground soil reinforcing operation method for mine restoration engineering |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805233B (en) * | 2020-08-03 | 2022-01-04 | 青岛交建集团有限公司 | Installation method of roller cleaning device of road roller |
| CN111809482B (en) * | 2020-08-03 | 2021-12-10 | 宣城先达建设工程有限公司 | Cleaning device for compression roller of road roller |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE525302C2 (en) * | 2002-08-23 | 2005-01-25 | Dynapac Compaction Equip Ab | Scraper for self propelled compactor, comprises profile with groove for mounting blade and channel for supplying wetting fluid to nozzle |
| CN201843055U (en) * | 2010-08-25 | 2011-05-25 | 徐工集团工程机械股份有限公司科技分公司 | Novel mud scraping device |
| WO2016017833A1 (en) * | 2014-07-30 | 2016-02-04 | Volvo Construction Equipment Ab | Device for cleaning the drum surface of asphalt compactors |
| CN205662817U (en) * | 2016-05-21 | 2016-10-26 | 朱高华 | Construction of highway on -stick earth roller |
| CN207143671U (en) * | 2017-08-25 | 2018-03-27 | 浙江路之友工程机械有限公司 | A kind of scraper of steel roller |
| CN207582249U (en) * | 2017-11-24 | 2018-07-06 | 深圳市交运工程集团有限公司 | A kind of road roller and its cleaning device |
| CN108179683A (en) * | 2017-12-29 | 2018-06-19 | 郑州国知网络技术有限公司 | A kind of efficient mud-scraping apparatus of municipal works road roller |
| CN109024176B (en) * | 2018-07-11 | 2020-07-24 | 福州市长乐区三互信息科技有限公司 | Mud scraping device with improved structure on road roller |
| CN208803335U (en) * | 2018-07-27 | 2019-04-30 | 天津市立发液压技术开发有限公司 | A kind of protective device of the hydraulic articulation steering bar of road roller |
-
2019
- 2019-10-18 CN CN201910995609.XA patent/CN110616624B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705579A (en) * | 2020-07-21 | 2020-09-25 | 黄江龙 | Ground soil reinforcing operation method for mine restoration engineering |
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| CN110616624A (en) | 2019-12-27 |
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Address after: 050000 No. 681 West Third Ring Road, Qiaoxi District, Shijiazhuang City, Hebei Province Applicant after: Yu Yajun Address before: 213000 No. 2 Tenglong Road, Wujin District, Changzhou City, Jiangsu Province Applicant before: Yu Yajun |
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