JP2012031655A - Guss asphalt finisher with horizontal sliding type level roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guss asphalt finisher enabling high-quality pavement construction with a finished surface of excellent flatness, by avoiding protrusions such as rivets provided on the joints of steel plate floors in foundation construction for a bridge floor slab pavement in which the top faces, etc. of the steel plate floors are unpaved surfaces.SOLUTION: The guss asphalt finisher is provided with a horizontal sliding type level roller 9. The horizontal sliding type level roller 9 has an upper end side connected to a leveling arm 6 and a lower end side provided with a roller 20 which rolls in contact with an unpaved surface. The roller 20 in the level roller 9 supporting the weight of a screed 5 via the leveling arm 6 is supported to be slidable in the width direction of a machine body 2 and is slid by a required amount by operation of driving means 23.

Description

  The present invention relates to a goose asphalt finisher provided with a level roller, and more particularly, to a goose asphalt finisher provided with a left and right slide type level roller capable of paving with high quality and good finish flatness.

  Conventionally, there is a goose asphalt finisher as a dedicated finisher for spreading and smoothing goose asphalt composites having properties such as high fluidity. This goose asphalt finisher is often used mainly for foundation construction of bridge floor slab pavement, and the goose asphalt mix used for pavement has more asphalt components than ordinary asphalt mix, and further heating Since the temperature is as high as 200 to 300 ° C., the fluidity is high as described above. For this reason, like a normal asphalt finisher, the screed cannot be floated on the goose asphalt mixture, and a level roller connected to the leveling arm is provided between the leveling cylinder and the screed, This level roller supports the screed weight and performs paving. The pavement thickness is adjusted mainly by moving the level roller and the leveling cylinder up and down, and the pavement thickness is determined by the height of the gap between the screed lower surface and the unpaved surface. Pour the goose asphalt mixture into this gap.

  As conventional techniques related to the goose asphalt finisher as described above, for example, the following asphalt finishers are known. In this prior art, a leveling arm whose tip is attached to a machine body and made swingable, and a goose asphalt composite material provided on an unpaved surface provided at the rear end of the leveling arm are provided in a predetermined manner. A goose asphalt finisher comprising a screed spread over the thickness and a level roller provided on the leveling arm and rolling in contact with the unpaved surface to set a distance between the screed and the unpaved surface. The level roller includes a hydraulic motor fixed to the leveling arm and rotating, a male screw connected to the hydraulic motor and rotating, and a female screw meshing with the male screw, for rotating the male screw. Accordingly, a roller that moves up and down with respect to the leveling arm, and a hydraulic shaft that is provided on the leveling arm and moves the roller up and down. And a Sunda.

  Then, the vertical position adjustment of the roller in the level roller is performed by a combination of a coarse movement operation that moves the roller quickly by a hydraulic cylinder and a fine movement operation that moves the roller by a hydraulic motor. When the adjustment range is large, the roller is roughly moved up and down by the hydraulic cylinder, and then the roller position is finely adjusted by the hydraulic motor.

  When the goose asphalt finisher is paving an unpaved surface, if a road joint is encountered, adjust the position of the leveling arm as necessary to raise the screed, and the screed and the road joint contact each other. To avoid. Examples of such obstacles include joints provided on the unpaved surface of the road at predetermined intervals, finger joint portions on the upper unpaved surface of the steel bridge, and manholes on the unpaved surface of the road. When this goose asphalt finisher encounters these, the hydraulic cylinder is quickly actuated in the extending direction to raise the leveling arm position, and the gap between the screed and the unpaved surface is increased to avoid obstacles. The operation by the hydraulic cylinder is fast. After exceeding the obstacle, the hydraulic cylinder is operated in reverse to restore the level roller state (see, for example, Patent Document 1).

Japanese Patent No. 3457791

  In the prior art described in Patent Document 1, when the goose asphalt finisher is paving the unpaved surface, the joints provided at predetermined intervals on the unpaved surface of the road, the finger joint portion on the upper unpaved surface of the steel bridge Or, if you encounter an obstacle such as a manhole on the unpaved surface of the road, quickly move the hydraulic cylinder in the level roller in the extending direction to raise the leveling arm position, and increase the distance between the bottom of the screed and the unpaved surface. Enlarge and dodge obstacles. However, when the screed lower surface is lifted to increase the distance from the unpaved surface, the pavement thickness due to the goose asphalt mixture increases, and the finished surface may become uneven.

  In addition, goose asphalt finisher is often used for foundation construction of bridge floor slab pavement (mostly steel floor slab), and during construction, protrusions such as rivets provided at the joint of the steel floor slab, If the current level roller is just in front of the level roller, the only way to avoid it is to step over the protrusion with the roller or lift the entire screed. In this case, the gap between the lower surface of the screed and the unpaved surface is increased by any means, the paving thickness by the goose asphalt mixture is increased as described above, and the finished surface becomes uneven, resulting in a decrease in paving quality. It will be.

  Therefore, in the foundation construction of bridge floor slab pavement where the upper surface of the steel slab is unpaved, this level is reached when protrusions such as rivets provided at the joint of the steel slab approach the front of the level roller. By sliding the roller of the roller in the left-right direction, the surface of the screed lifted by the leveling arm is not affected, and the protrusions are avoided from the rolling path of the roller so that the finished surface has good flatness and high quality paving. The technical problem which should be solved arises in order to make it possible, and this invention aims at solving this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 includes a leveling arm whose tip is attached to a machine body and is swingable, and a rear end of the leveling arm. A screed that spreads and smoothes the goose asphalt composite material that is supported on the unpaved surface and is provided with a roller that is connected to the leveling arm at the upper end side and rolls in contact with the unpaved surface at the lower end side. A goose asphalt finisher having a left and right slide type level roller having a level roller that supports the weight of the screed via a leveling arm, the roller being supported and driven to be slidable in the width direction of the machine body Goose asphalt physics equipped with left and right slide type level rollers configured to slide the required amount by driving means To provide a Ssha.

  According to this structure, the goose asphalt finisher is often used for foundation construction of bridge floor slab pavement in which the upper surface of the steel slab is unpaved. During this construction, when a protrusion such as a rivet provided at the seam of the steel floor slab is just in front of the level roller, the drive means is driven and the roller is required in the machine body width direction (left and right direction). By sliding the amount, the roller can be rolled while avoiding the protrusion. At this time, since the roller only slides left and right on the unpaved surface, the screed lift state by the leveling arm is not affected, and the height of the bottom surface of the screed does not change.

  According to a second aspect of the present invention, there is provided a goose asphalt finisher according to the first aspect, wherein the driving means includes a left / right sliding type level roller which is a hydraulic cylinder.

  According to this configuration, the driving means is a hydraulic cylinder, so that during the pavement construction of the goose asphalt composite material in which the upper surface of the steel floor slab is an unpaved surface, projections such as rivets provided at the joint of the steel floor slab When an object reaches just in front of the level roller, the operation of the hydraulic cylinder ensures that the roller slides in the required amount in the width direction (left and right direction) of the machine body.

  According to the first aspect of the present invention, the driving means is driven and the roller is slid by a required amount in the width direction (left-right direction) of the machine body. Protrusions can be avoided from the moving path, and there is an advantage that the finished surface has good flatness and high quality pavement.

  In addition to the effect of the invention of the first aspect, the invention described in claim 2 further has the effect that the roller is moved in the width direction of the machine body (left-right direction) by the operation of the hydraulic cylinder when the projection is avoided from the roller rolling path. ) Has the advantage that the required amount can be reliably slid by a fast operation.

The figure shows a goose asphalt finisher having a left and right slide type level roller according to an embodiment of the present invention.
Side view of goose asphalt finisher equipped with left and right sliding level rollers. The rear view of FIG. It is a figure which expands and shows a level roller part, (a) is a partial cross section front view, (b) is a right view of figure (a).

  The present invention, in the foundation construction of bridge floor slab pavement where the upper surface of the steel floor slab is an unpaved surface, etc., when a protrusion such as a rivet provided at the joint of the steel floor slab approaches the front of the level roller By sliding the roller of the level roller in the left and right direction, the flatness of the finished surface is good and high quality by avoiding the protrusion from the roller rolling path without affecting the lift state of the screed by the leveling arm. In order to achieve the purpose of enabling paving, a leveling arm whose tip is attached to the machine body and swingable is supported on the rear end of the leveling arm and supplied on an unpaved surface. A screed that spreads and smoothes the goose asphalt mixture, and a roller that rolls in contact with the unpaved surface at the lower end and is connected to the leveling arm at the lower end. A goose asphalt finisher having a left and right slide type level roller having a level roller that supports the weight of the screed via a leveling arm, the roller being supported and driven to be slidable in the width direction of the machine body This is realized by a configuration in which a required amount is slid by driving the means.

  A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3 (a) and (b). First, the structure of the goose asphalt finisher provided with the left and right slide type level roller according to the present embodiment will be described. 1 and 2, the left and right front wheels 3a, 3a serving as steering wheels are provided on the front side of the lower part of the machine body 2 in the goose asphalt finisher 1, and the left and right rear wheels serving as driving wheels are provided on the rear side. Wheels 3b and 3b are provided.

  On the front side of the upper part of the machine main body 2, there is provided a composite hopper 4 with a heat retaining device for receiving a goose asphalt composite heated to 200 to 300 ° C. from a cooker wheel (not shown). The goose asphalt composite material received by the composite material hopper 4 is conveyed to the rear part of the machine body 2 by a screw conveyor (not shown), and the conveyed goose asphalt composite material is machined by a spreading screw (not shown) on the unpaved surface. The main body 2 is spread in the width direction. Behind the spreading screw, a screed 5 for spreading and leveling the spread goose asphalt composite is supported at the rear end of the leveling arm 6.

  A pair of leveling arms 6 are provided on the left and right sides of the machine body 2. The leveling arm 6 is attached to the machine main body 2 through the leveling cylinder 7 at the tip, and the rear side is attached to the machine main body 2 through the scree drift cylinder 8 that is hydraulically free during paving. ing. Further, level rollers 9 for supporting the leveling arm 6 on the unpaved surface are provided at substantially intermediate portions of the leveling arms 6, respectively.

  The level roller 9 is provided with a roller 20 whose upper end side is connected to the leveling arm 6 and whose lower end side rolls in contact with the unpaved surface. The level roller 9 supports the weight of the screed 5 through the leveling arm 6, and the goose asphalt mixture is leveled on the unpaved surface. The pavement thickness is adjusted mainly by adjusting the level roller 9 and the leveling cylinder 7 up and down, and the pavement thickness is determined by the gap height between the bottom surface of the screed 5 and the unpaved surface.

  3A and 3B show the configuration of the level roller 9 in an enlarged manner. The level roller 9 is provided on each of the pair of left and right leveling arms 6 and 6. A portion of the holding bracket 10 is fixed to the leveling arm 6, and a cylindrical outer tube 11 is attached to the holding bracket 10 so as to be movable in the vertical direction. A pavement thickness adjusting screw 12 is fixed to the upper end of the outer tube 11 so as to be rotatable, and a screw rod 12 a in the pavement thickness adjusting screw 12 extends into the outer tube 11. A cylindrical inner tube 13 is movably fitted in the outer tube 11, and a nut portion 14 that is screwed into the screw rod 12 a is fixed to the upper end of the inner tube 13.

  A guide groove 15a is formed in the vertical direction in the vicinity of the lower end of the inner tube 13, and a guide pin 15b fixed to the lower end of the outer tube 11 is engaged with the guide groove 15a so as to be movable relative to the first groove. A vertical guide 15 is formed. When the pavement thickness adjusting screw 12 is rotated, it is guided by the first vertical guide 15 and the lower end of the inner tube 13 is adjusted in the vertical direction. In addition, a guide groove 16a is formed in the vertical direction at a substantially central portion in the height direction of the outer tube 11, and a guide pin 16b fixed to the holding bracket 10 side is relatively movable with respect to the guide groove 16a. In combination, a second vertical guide 16 is formed.

  A level roller storage cylinder 17 is attached via a bracket 18 at a position of the leveling arm 6 that is an appropriate amount above the fixing position of the holding bracket 10 immediately on the side of the fixing position of the holding bracket 10. The tip of the piston rod 17a in the level roller storage cylinder 17 is connected to the lower end of the outer tube 11 through a pin. The level roller storage cylinder 17 operates so that the piston rod 17a moves backward only when the goose asphalt finisher 1 is transported. The level roller storage cylinder 17 is guided by the second vertical guide 16 and the outer pipe 11 is raised by a required amount. Along with this, the required amount of the inner pipe 13 is raised.

  In this embodiment, a roller 20 that is in contact with an unpaved surface via a left and right slide guide 19 is rotatably provided at the lower end of the inner tube 13. The left and right slide guide 19 includes a guide base 21 fixed to the lower end of the inner tube 13 and a slider 22 supported in a square groove formed on both lower sides of the guide base 21 so as to be slidable in the left-right direction. Is provided. The roller 20 is rotatably provided on the lower surface side of the slider 22.

  Hydraulic cylinders 23, 23 as drive means for sliding the slider 22, that is, the roller 20 in the left-right direction (the width direction of the machine body), are provided on the upper surface of the guide base 21 at both the front and rear sides of the lower end of the inner tube 13. Each is installed. The tip ends of the piston rods 23a, 23a in the two hydraulic cylinders 23, 23 are connected to the extending portion from the slider 22 via pins.

  Next, the operation of the goose asphalt finisher provided with the left and right sliding type level roller configured as described above will be described. In general, the goose asphalt finisher 1 is often used for foundation construction of a bridge floor slab pavement in which the upper surface of the steel slab is an unpaved surface. In this construction, the pavement thickness adjusting screw 12 in the level roller 9 is rotated, and the protruding length of the piston rod in the leveling cylinder 7 is adjusted so that the height of the lower surface of the screed 5 with respect to the unpaved surface is the required height. Set to the required value and execute the construction.

  During the pavement construction of the goose asphalt composite material with such a required condition, as shown in FIG. 1, the protrusions P such as rivets provided at the seam of the steel floor slab are level rollers 9 2 just before the two hydraulic cylinders 23 and 23 are actuated, and as shown in FIG. 2 and FIG. 3B, the roller 20 is moved in the width direction (left-right direction) of the machine body 2. Slide the required amount. This makes it possible to roll the roller 20 while avoiding the protrusions P.

  At this time, since the roller 20 only slides left and right on the unpaved surface, the lift state of the screed 5 by the leveling arm 6 is not affected, and the height of the lower surface of the screed 5 does not vary. . Further, the protrusions P such as rivets are lower in height than the paving thickness of the goose asphalt composite material that is normally set. For this reason, the protrusions P such as rivets are buried in the pavement thickness of the goose asphalt mixture to be spread. Therefore, a finished surface with good flatness can be obtained without variation in the set pavement thickness of the goose asphalt mixture.

  As described above, in the goose asphalt finisher provided with the left and right slide type level roller according to the present embodiment, when the projection P such as a rivet reaches just in front of the level roller 9, the hydraulic cylinders 23 and 23 are moved. By operating and sliding the roller 20 by a required amount in the width direction (left-right direction) of the machine body 2, the protrusion P is removed from the rolling path of the roller 20 without causing a change in the height of the lower surface of the screed 5. Can be avoided. Therefore, it is possible to perform pavement with a goose asphalt mixture having a good finished surface and high quality.

  By using the hydraulic cylinder 23 as a driving means for sliding the roller 20 by a required amount, the roller 20 can be reliably slid by a quick operation in the width direction (left-right direction) of the machine body 2.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  When a projection such as a rivet provided at the joint of a steel floor slab as an unpaved surface reaches the front of the level roller, the leveling arm slides the roller of the level roller to lift the screed by the leveling arm High fluidity other than goose asphalt mixture, which is essential to enable high quality paving with good flatness of the finished surface by avoiding the projections from the roller rolling path without affecting the roller The present invention can be widely applied to a paving machine that spreads and mixes composite materials.

DESCRIPTION OF SYMBOLS 1 Goose asphalt finisher 2 Machine main body 3a Front wheel 3b Rear wheel 4 Composite material hopper 5 Screed 6 Leveling arm 7 Leveling cylinder 8 Screed drift cylinder 9 Level roller 10 Holding bracket 11 Outer pipe 12 Pavement thickness adjustment screw 13 Inner pipe 14 Nut 15 First vertical guide 16 Second vertical guide 17 Level roller storage cylinder 18 Bracket 19 Left and right slide guide 20 Roller 21 Guide base 22 Slider 23 Hydraulic cylinder

Claims (2)

A leveling arm whose tip is attached to the machine body and made swingable, a screed that spreads and smoothes the goose asphalt composite material supported on the unpaved surface supported by the rear end of the leveling arm, and an upper end A goose comprising a left and right slide type level roller having a roller connected to the leveling arm and having a roller which rolls in contact with the unpaved surface and supports the weight of the screed through the leveling arm. An asphalt finisher,
The goose asphalt finisher provided with a left-right slide type level roller, wherein the roller is slidably supported in the width direction of the machine body and is slid by a required amount by driving of a driving means.   2. The goose asphalt finisher having a left / right sliding type level roller according to claim 1, wherein the driving means is a hydraulic cylinder.

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