US20140369751A1 - Leveling device of road paving machine - Google Patents

Leveling device of road paving machine Download PDF

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Publication number
US20140369751A1
US20140369751A1 US14/345,643 US201214345643A US2014369751A1 US 20140369751 A1 US20140369751 A1 US 20140369751A1 US 201214345643 A US201214345643 A US 201214345643A US 2014369751 A1 US2014369751 A1 US 2014369751A1
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United States
Prior art keywords
screed
pair
extendable
screeds
extendable screeds
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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.)
Abandoned
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US14/345,643
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English (en)
Inventor
Satoshi Kobayashi
Youhei Itoh
Tetsuya Watanabe
Fumio Gotoh
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Sumitomo SHI Construction Machinery Co Ltd
Original Assignee
Sumitomo SHI Construction Machinery Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Sumitomo SHI Construction Machinery Co Ltd filed Critical Sumitomo SHI Construction Machinery Co Ltd
Assigned to SUMITOMO (SHI) CONSTRUCTION MACHINERY CO., LTD reassignment SUMITOMO (SHI) CONSTRUCTION MACHINERY CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WATANABE, TETSUYA, GOTOH, FUMIO, ITOH, YOUHEI, KOBAYASHI, SATOSHI
Publication of US20140369751A1 publication Critical patent/US20140369751A1/en
Abandoned legal-status Critical Current

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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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • 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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E01C19/4866—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • the present invention relates to a leveling device of a road paving machine, and in particular to a leveling device of a road paving machine that makes it possible to perform minus crown paving work properly in a paving work width region where a paving work in a minus crown has been impossible to improve performance.
  • a screed device for a road paving vehicle such as an asphalt finisher such as shown in FIG. 3 and FIGS. 4( a ) and 4 ( b ) has been known.
  • a road paving machine 1 is provided with a hopper 3 receiving asphalt mixture from a dump truck or the like at a front portion of a machine main body 2 , and a conveyer feeder 4 for feeding asphalt mixture in the hopper 3 rearward is provided.
  • a conveyer feeder 4 for feeding asphalt mixture in the hopper 3 rearward is provided.
  • the asphalt mixture which has been fed rearward by the conveyer feeder 4 drops on a road bed, it is fed in a leveling width direction by a screw spreader 5 provided behind the machine main body 2 .
  • the asphalt mixture is leveled on the road bed by a screed device (leveling device) 7 coupled to the machine main body 2 by screed arms 6 behind the screw spreader 5 .
  • the screed device 7 is configured so as to be capable of changing a leveling width
  • first and second extendable screeds 9 and 10 having a width approximately equal to a width of a main screed 8 are provided side by side back and forth behind the main screed 8 , and they are stored within a width approximately equal to the width of the main screed 8 in a stored state of the first and second extendable screeds 9 and 10 , as shown in FIG. 4 ( a ).
  • holes are provided in support supporting portions 11 and 12 provided on both sides of a rear upper portion of the main screed 8 , respectively, and guide shaft 13 or 14 is supported in the holes so as to be slidable laterally.
  • both end portions of the guide shaft 13 or 14 are fixed to both ends of supports 15 or 16 .
  • holes are provided at both ends of the support 15 or 16 , a guide shaft 17 or 18 is supported in the holes so as to be slidable laterally, and both end portions of the guide shaft 17 or 18 are fixed to both ends of the first or second extendable screed 9 or 10 .
  • a feeding device such as a hydraulic cylinder is provided, and such a structure that in a state that the first extendable screed 9 and the second extendable screed 10 have been extended maximally by moving the first extendable screed 9 or the second extendable screed 10 from their positions behind the main screed 8 in a leveling width direction and in directions opposite to each other, respectively, a leveling range can be expanded up to about three times (see Lmax) of a main screed width L is adopted (for example, see Patent Literature 1).
  • FIGS. 5 ( a ) and 5 ( b ) there is one such as shown in FIGS. 5 ( a ) and 5 ( b ).
  • This conventional art is an art where a screed device 7 A of a type where behind the main screed 8 such as described above, first and second extendable screed 9 and 10 having a width approximately equal to the width of the main screed 8 are provided side by side in a paired fashion is additionally provided with a crown adjusting mechanism (not shown) , and a required crown amount is set.
  • FIG. 5( a ) is a plan view
  • FIG. 5( b ) is a rear view.
  • the crown amount is a value corresponding to an inclination angle e of a screed lower face having the center of the screed lower face in a widthwise direction (a lateral direction in FIG. 5( b )) as a rotation center, as shown in FIG. 5( b ), and it is set in a range from plus to minus in order to achieve improvement of paving quality.
  • a case of ⁇ 180° indicates a plus crown and a case of ⁇ >180° indicates a minus crown. Therefore, the case shown in FIG. 5( b ) indicates a case where the minus crown has been set.
  • a minimum paving work width (approximately equal to the main screed width L) of the screed device is, for example, 2.3 m
  • a maximum paving work width is 6 m
  • a paving width when the first and second extendable screeds 9 and 10 are extended so that the respective inner ends 9 a and 10 a of the first and second extendable screeds 9 and 10 are positioned at a machine main body center line is, for example, about 4 m, if the paving width is set at the paving width of 4 m or less, the lower faces of the first and second extendable screeds 9 and 10 in the vicinities of the respective inner ends 9 a and 10 a protrude beyond the lower face of the main screed 8 .
  • FIG. 6 there is one such as shown in FIG. 6 .
  • This conventional art is a screed device 7 B of a type where in such a case that first and second extendable screeds 9 and 10 are formed to have a width approximately equal to a width of a main screed 8 , the first extendable screed 9 is disposed in front of the main screed 8 and the second extendable screed 10 is disposed behind the main screed 8 .
  • Patent Literature 1 Japanese Patent No. 3383908
  • Patent Literature 1 a screed device of a type where behind the main screed, the first and second extendable screeds having a width approximately equal to the width of the main screed have been arranged side by side back and forth is shown.
  • a technical problem to be solved occurs in order to make it possible to perform minus crown paving work properly in a paving work width region where paving work in a minus crown has been impossible to achieve performance improvement, and an object of the present invention is to solve this problem.
  • the present invention has been proposed in order to achieve the above-described object, and the invention in claim 1 provides a leveling device of a road paving machine which is provided with a main screed and a pair of extendable screeds having a width approximately equal to a width of the main screed and extending and retreating in directions opposite to each other, the leveling device of a road paving machine being of either one type of a type where the pair of extendable screeds are disposed behind the main screed, a type where the pair of expendable screeds are disposed in front of the main screed, or a type where one and the other of the pair of extendable screeds are disposed in front of and behind the main screed in a divisional fashion, wherein the leveling device of a road paving machine is provided with a raising mechanism which, when a crown amount is set to minus in a case where respective inner ends of the pair of extendable screeds have been extended in such a range as not to where the respective inner ends do not exceed a machine center
  • the invention in claim 2 provides the leveling device of a road paving machine in the invention according to claim 1 wherein the raising mechanism is configured as a refraction up-and-down type where the respective screed plates in required length ranges are raised in an angled fashion by utilizing lower face portions of the respective extendable screeds at required length regions of the pair of extendable screeds from the respective inner ends as hinge portions.
  • the raising mechanism as the refraction up-and-down type and raising the respective screed plates in required length ranges in an angled fashion by utilizing the lower face portions of the respective extendable screeds as the hinge portions, it is made possible to raise the lower faces of the pair of extendable screeds in the vicinities of the respective inner ends beyond the lower face of the main screed easily and securely.
  • the invention in claim 3 provides the leveling device of road paving machine in the invention according to claim 1 , wherein the raising mechanism is configured as a parallel up-and-down type where the respective screed plates in required length ranges are configured so as to be slidable vertically at required length regions of the pair of extendable screeds from the respective inner ends, and the respective screed plates in required length ranges are raised while being slid in parallel with slide faces.
  • the raising mechanism as the parallel up-and-down type and raising the screed plates in required length ranges while sliding them in parallel with the slide face, it is made possible to raise the lower faces of the pair of extendable screeds in the vicinities of the respective inner ends beyond the lower face of the main screed easily and securely.
  • the invention described in claim 1 has such a merit that in a leveling device of a road paving machine which is provided with a main screed and a pair of extendable screeds having a width approximately equal to a width of the main screed, the leveling device being of either one type of a type where the pair of extendable screeds are disposed behind the main screed, a type where the pair of expendable screeds are disposed in front of the main screed, and a type where one and the other of the pair of extendable screeds are disposed in front of and behind the main screed in a divisional fashion, minus crown paving work can be performed properly in a paving work width region where the respective inner ends of the pair of extendable screeds have been extended in a range where the respective inner ends do not exceed the machine center line, so that performance of the leveling device can be improved.
  • the invention described in claim 2 has such a merit that since the raising mechanism is configured as the refraction up-and-down type, the lower faces in the vicinities of the respective inner ends of the pair of extendable screeds can be raised above beyond the lower face of the main screed securely and proper minus crown paving work can be realized easily in a paving work width region where the respective inner ends of the pair of extendable screeds have been extended in such a range that the respective inner ends do not exceed the machine center line in addition to the effect of the invention described in claim 1 .
  • the invention described in claim 3 has such a merit that since the raising mechanism is configured as the parallel up-and-down type, the lower faces of the pair of extendable screeds in the vicinities of the respective inner ends can be raised above beyond the lower face of the main screed securely and proper minus crown paving work can be realized easily in a paving work width region where the respective inner ends of the pair of extendable screeds have been extended in such a range that the respective inner ends do not exceed the machine center line in addition to the effect of the invention described in claim 1 .
  • FIGS. 1( a ) and 1 ( b ) are views showing a leveling device to which a raising device of a refraction up-and-down type according to Example 1 of the present invention has been applied, FIG. 1( a ) being a plan view and FIG. 1( b ) being a rear view;
  • FIG. 2 is a rear view of a leveling device to which a raising mechanism of a parallel up-and-down type according to Example 2 of the present invention has been applied;
  • FIG. 3 is a plan view of a road paving machine as a first conventional art
  • FIGS. 4( a ) and 4 ( b ) are views showing a screed device in the road paving machine shown in FIG. 3 , FIG. 4( a ) being a plan view when first and second extendable screeds are in a stored state, and FIG. 4( b ) being a plan view showing a state where the first extendable screed and the second extendable screed have been expanded maximally;
  • FIGS. 5( a ) and 5 ( b ) are views showing a screed device as a second conventional art, FIG. 5( a ) being a plan view and FIG. 5( b ) being a rear view; and
  • FIG. 6 is a plan view of a screed device as a third conventional art.
  • the present invention is realized by a leveling device of a road paving machine which is provided with a main screed and a pair of extendable screeds having a width approximately equal to the width of the main screed and extending and retracting in directions opposite to each other, the leveling device being of either one
  • a leveling device (screed device) 19 is configured such that behind a main screed 20 , a pair of extendable screeds 21 and 22 having a width approximately equal to a width of the main screed 20 and extending and retreating in directions opposite to each other are provided side by side back and forth.
  • this Example is provided with a raising mechanism of a refraction up-and-down type which, when a crown amount is set to minus in such a state that respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 have been extended in a range where the respective inner ends 21 a and 22 a do not exceed a machine center line, raises screed plates 21 b and 22 b in required length ranges on the sides of the respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 according to a minus set amount of the crown amount.
  • the raising mechanism of a refraction up-and-down type is configured so as to raise the respective screed plates 21 b and 22 b in required length ranges in an angled fashion an angle by utilizing lower face portions of the respective extendable screeds 21 and 22 at required length regions from the inner ends 21 a and 22 a on the respective extendable screeds 21 and 22 as hinge portions 23 a and 23 b.
  • a manual operation system As a means for raising the respective screed plates 21 b and 22 b in required length ranges from the hinge portions 23 a and 23 b in an angled fashion, a manual operation system, a method of automatically detecting extended or retracted positions of the respective extendable screeds 21 and 22 by a limit switch or the like and automatically controlling a raising operation in an angled fashion based upon the detection result, or the like is applied.
  • the pair of extendable screeds 21 and 22 having a width approximately equal to a width of the main screed 20 and extending and retreating in direction opposite to each other are arranged side by side back and forth, a minus crown paving work can be performed properly in a paving work width region where the respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 have been extended in a range where they do not exceed the machine center line so that performance of the leveling device 19 can be improved.
  • the raising mechanism is configured as the refraction up-and-down type, the lower faces of the pair of extendable screeds 21 and 22 in the vicinities of the respective inner ends 21 a and 22 b can be raised above beyond the lower face of the main screed 20 securely, so that a proper minus crown paving work can be realized easily in a paving work width region where the respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 have been extended in such a range that they do not exceed the machine center line.
  • Example 2 of the present invention will be described with reference to FIG. 2 .
  • the above-descried raising mechanism is configured in a parallel up-and-down type.
  • the raising mechanism of a parallel up-and-down type is configured so as to be capable of slide screed plats 21 b and 22 b in required length ranges on the side of respective inner ends 21 a and 22 a of a pair of extendable screeds 21 and 22 vertically at required length regions from the inner end 21 a and 22 a of the respective extendable screeds 21 and 22 and is configured so as to raise the screed plates 21 b and 22 b while sliding the screed plates 21 b and 22 b in required length ranges in parallel with slide faces 24 a and 24 b , respectively.
  • a manual operation system As a means for moving the screed plates 21 b and 22 b upward and downward while sliding the screed plates 21 b and 22 b in required length ranges in parallel with the side faces 24 a and 24 b, respectively, a manual operation system, a system for automatically detecting extended and retracted positions of the respective extendable screeds 21 and 22 by a limit switch or the like and automatically controlling upward-moving and downward-moving operations based upon the detection result, or the like is applied.
  • the raising mechanism is configured as the parallel up-and-down type, it is made possible to raise the lower faces of the respective extendable screeds 21 and 22 in the vicinities of the inner ends 21 a and 22 a thereof above beyond the lower face of the main screed 20 securely and it is made possible to realize a proper minus crown paving work easily in a paving work width region where the respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 have extended in a range where they does not exceed the machine center line.
  • Example 1 and Example 2 can also be applied to a leveling device of a type where a pair of extendable screeds 21 and 22 are provided side by side in front of a main screed 20 and a leveling device of a type where one extendable screed 21 is arranged in front of a main screed 20 and the other extendable screed 22 is arranged behind the main screed 20 , such as shown in the above-described FIG. 6 .
  • the leveling device is configured as one of the both types, the raising mechanism of the refraction up-and-down type or the parallel up-and-down type is provided on the sides of the respective inner ends 21 a and 22 a of the pair of extendable screeds 21 and 22 .
  • a leveling device which is provided with a main screed and a pair of extendable screeds having a width approximately equal to a width of the main screed, the leveling device being of either one of a type where the pair of extendable screeds are disposed behind the main screed, a type where the pair of extendable screeds are disposed in front of the main screed, or a type where one and the other of the pair of extendable screeds are disposed in front of and behind the main screed in a divisional fashion, can be widely applied to a leveling device including an asphalt finisher with an emulsion spraying function or without the same where it is essential to make it possible to perform minus crown paving work properly in a paving work width region where paving work in a minus crown has been impossible to achieve performance improvement, or the like.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
US14/345,643 2011-09-29 2012-06-18 Leveling device of road paving machine Abandoned US20140369751A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011-214033 2011-09-29
JP2011214033A JP5818615B2 (ja) 2011-09-29 2011-09-29 道路舗装機械の敷き均し装置
PCT/JP2012/065472 WO2013046821A1 (ja) 2011-09-29 2012-06-18 道路舗装機械の敷き均し装置

Publications (1)

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US20140369751A1 true US20140369751A1 (en) 2014-12-18

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US14/345,643 Abandoned US20140369751A1 (en) 2011-09-29 2012-06-18 Leveling device of road paving machine

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US (1) US20140369751A1 (de)
EP (1) EP2762640B1 (de)
JP (1) JP5818615B2 (de)
CN (1) CN103827394B (de)
WO (1) WO2013046821A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108951380A (zh) * 2018-08-14 2018-12-07 三汽车制造有限公司 一种熨平挡料装置及摊铺机
US11473250B2 (en) * 2020-01-21 2022-10-18 Wirtgen Gmbh Placer spreader with adjustable strike off

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680451A (en) * 1970-06-15 1972-08-01 Schneider Simpson Roadway sloping attachment for asphalt paving machine
US4364690A (en) * 1978-05-31 1982-12-21 Maschinenfabrik Klaus-Gerd Hoes Methods of setting roadmaking material and smoothing screeds for performing such methods
US4379653A (en) * 1981-06-01 1983-04-12 White Consolidated Industries, Inc. Asphalt paver with telescoping screed
US4818140A (en) * 1988-01-22 1989-04-04 Carlson James O Screed extender with berm-forming screed
US4854769A (en) * 1987-02-26 1989-08-08 Kajima Corporation System for paving inclined and/or curved surfaces
JPH02240306A (ja) * 1989-03-13 1990-09-25 Nippon Hodo Co Ltd 湾曲面仕上装置
US6022170A (en) * 1997-09-10 2000-02-08 Allgemeine Baumaschinen-Gesellschaft Mbh Paver
US6712549B2 (en) * 2002-07-09 2004-03-30 Blaw-Knox Construction Equipment Corporation Double-axis oscillating bogie wheels
US20110305509A1 (en) * 2010-06-11 2011-12-15 Joseph Vogele Ag Screed arrangement for a road finisher

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US3602113A (en) * 1969-10-22 1971-08-31 Blaw Knox Co Automatic crowning system for pavers
US5484227A (en) * 1993-04-09 1996-01-16 Niigata Engineering Co., Ltd. Control device for asphalt finisher
JP2949094B2 (ja) * 1997-10-20 1999-09-13 範多機械株式会社 舗装機におけるスクリード装置
JP3383908B2 (ja) * 1999-06-15 2003-03-10 住友建機製造株式会社 アスファルトフィニッシャ等の道路舗設車両のスクリード装置
JP4486067B2 (ja) * 2006-08-07 2010-06-23 住友建機株式会社 道路舗装機械におけるスクリード調整機構
CN201358433Y (zh) * 2009-02-16 2009-12-09 朱存玉 摊铺机伸缩熨平板段差自动调整机构
CN101718072B (zh) * 2009-12-04 2011-06-08 中国人民解放军国防科学技术大学 基于摄像测量的摊铺机自动找平系统及方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680451A (en) * 1970-06-15 1972-08-01 Schneider Simpson Roadway sloping attachment for asphalt paving machine
US4364690A (en) * 1978-05-31 1982-12-21 Maschinenfabrik Klaus-Gerd Hoes Methods of setting roadmaking material and smoothing screeds for performing such methods
US4379653A (en) * 1981-06-01 1983-04-12 White Consolidated Industries, Inc. Asphalt paver with telescoping screed
US4854769A (en) * 1987-02-26 1989-08-08 Kajima Corporation System for paving inclined and/or curved surfaces
US4818140A (en) * 1988-01-22 1989-04-04 Carlson James O Screed extender with berm-forming screed
JPH02240306A (ja) * 1989-03-13 1990-09-25 Nippon Hodo Co Ltd 湾曲面仕上装置
US6022170A (en) * 1997-09-10 2000-02-08 Allgemeine Baumaschinen-Gesellschaft Mbh Paver
US6712549B2 (en) * 2002-07-09 2004-03-30 Blaw-Knox Construction Equipment Corporation Double-axis oscillating bogie wheels
US20110305509A1 (en) * 2010-06-11 2011-12-15 Joseph Vogele Ag Screed arrangement for a road finisher

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Publication number Publication date
EP2762640A4 (de) 2015-06-17
EP2762640A1 (de) 2014-08-06
CN103827394A (zh) 2014-05-28
EP2762640B1 (de) 2017-04-19
WO2013046821A1 (ja) 2013-04-04
JP5818615B2 (ja) 2015-11-18
CN103827394B (zh) 2016-05-11
JP2013072263A (ja) 2013-04-22

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Owner name: SUMITOMO (SHI) CONSTRUCTION MACHINERY CO., LTD, JA

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STCB Information on status: application discontinuation

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