JP5160606B2 - Asphalt finisher conveyor width control structure - Google Patents

Description

  The present invention relates to a conveyor transport width regulation structure for an asphalt finisher for paving a paving material such as an asphalt mixture on a road surface, and in particular, positioning a boundary line (lane) of the asphalt to be paved on a road surface. The present invention relates to a conveyor transport width regulating structure for an asphalt finisher that spreads and leveles paving material along a road width regulated by a lane pulling unit.

  2. Description of the Related Art Conventionally, an asphalt finisher having a structure in which two hoppers are provided at the front and rear is known (see, for example, Patent Document 1). The asphalt finisher is, for example, mounted with a pavement material having excellent wear resistance on a front hopper (hereinafter referred to as `` front hopper ''), and a normal hopper on the rear hopper (hereinafter referred to as `` rear hopper ''). An inexpensive pavement material is mounted, and the pavement material having excellent wear resistance of the front hopper is spread on the ridge portion on the road surface, and the inexpensive pavement material of the rear hopper is placed on other portions (for example, It is used by spreading it on the middle part and side part of the furrow).

  In such an asphalt finisher, a lane pulling unit is attached to the screed arm. While drawing a predetermined lane by the lane pulling unit, two kinds of pavement materials are discriminated on both sides of the boundary line of the lane and simultaneous pavement is performed. A structure that can be used is also known (no patent document). Such an asphalt finisher performs pavement simultaneously using two types of pavement materials according to a predetermined lane while being self-propelled, so that the pavement quality and workability with good mutual adhesion are greatly improved. As a result, there is an advantage that it is possible to construct a highly durable pavement at low cost for the entire road surface.

11 and 12 show a conventional lane pulling unit configured to draw a predetermined lane on a road surface and discriminate two kinds of pavement materials on both sides of a boundary line of the lane to perform simultaneous pavement. FIG. 11 is a plan view of the rear structure as viewed from above, and FIG. 12 is a side view of the rear structure as viewed from the left side. In the figure, a lane pulling unit 100 is attached via brackets 102 and 102 to the front of a screed 101 that is pulled through the rear of the aircraft (not shown) and the left and right leveling arms 104 and 104. The movement is free, and the ground is held on the road surface G in a state where movement in the left-right direction is restricted. The lane pulling unit 100 is pushed forward from the rear side by the screed 101 and moves forward.
Further, in front of the lane pulling unit 100, the lane pulling unit 100 is appropriately attached so as to include a lane pulling box 103.

Further, above the lane pulling unit 100, hydraulic cylinders 105, 105 for raising and lowering the lane pulling unit constituting suspending tools for suspending and supporting the lane pulling unit 100 by left and right leveling arms 104, 104, respectively. And manual jacks 106 and 106 and a chain 107 are provided. Further, an end plate 108 protruding forward is provided at the outer end in the width direction of the lane pulling unit 100 to partition the band between the lanes of the paving material.

  In the side view (FIG. 12), the lane pulling box 103 is provided with a substantially U-shaped groove 109 on the front side, and the lane pulling unit 100 is provided with a substantially V-shaped groove 110 on the rear side. A front screw spreader 111 is disposed in the front substantially U-shaped groove 109, and a rear screw spreader 112 is disposed in the rear substantially V-shaped groove 110.

  Then, the pavement material having excellent wear resistance of the front hopper is conveyed rearward by the conveyor 113 to the front U-shaped groove 109 and dropped, and the rear hopper is inserted into the rear V-shaped groove 110. An inexpensive pavement material is conveyed backward by the conveyor 27 and dropped. Further, the pavement material dropped into the substantially V-shaped groove 110 flows down from the central opening to the central first zone by the rear screw spreader 112, and will be described later from the outer end of the lane pulling unit 100. It is made to flow down to the 3rd zone outside the 2nd zone, and is spread on the road surface. On the other hand, the pavement material dropped into the substantially U-shaped groove 109 is caused to flow down from the outer end portion of the lane pulling box 103 to the second zone between the first zone and the third zone by the front screw spreader 111. To be spread. At this time, the end plate 108 partitions the front hopper pavement material and the rear hopper pavement material so as not to be mixed.

  In this way, the asphalt finisher that performs paving while pulling the lane by the lane pulling box 103 and the lane pulling unit 100 separates each paving material from the front hopper and the rear hopper on the road surface behind the machine body by using each conveyor. Is transferred to the lane pulling unit 100 slid and dropped into the substantially U-shaped groove portion 109 and the substantially V-shaped groove portion 110, and the front and rear screw spreaders 111 and 112 receive the respective pavement materials and the width of the road surface. Spreading in the direction. As a result, for example, the pavement material with excellent wear resistance mounted on the front hopper is dropped and leveled on the second zone, which is the two side areas (ridges) of the first zone (center zone) of the road surface. An inexpensive pavement material mounted on the side hopper can be dropped and leveled on the first zone and the third zone of the road surface.

Japanese Patent No. 3471598

  However, as in the above prior art, the groove structure of the lane pulling box where the screw spreader receives the pavement material requires a certain height of ridges so that the pavement material does not spill, so the pavement material is placed above the lane pulling box. The conveyor had to be placed diagonally in order to drop it. For this reason, the conveyor for transporting the paving material and the surrounding structure must be made special, and the bogie and components of the fuselage cannot be shared with a general-purpose asphalt finisher, which contributes to high costs. It was.

  Therefore, in the asphalt finisher, when the pavement material is conveyed to the screw spreader by the general-purpose conveyor horizontally disposed in the hopper, the substantially U-shaped groove portion 109 that needs a certain height for the screw spreader to receive the pavement material is formed. When the lane pulling box 103 having the lane pulling box 103 is also abolished, the pavement material must be reliably conveyed to a predetermined band between the lanes arranged in the left-right direction perpendicular to the traveling direction to be formed by the lane pulling box 103. Technical problems arise, and the present invention aims to solve these problems.

  The present invention has been proposed in order to achieve the above-mentioned object, and the invention according to claim 1 is the invention in which the first and second hoppers dropped from the dropping port of the charging feeder installed in the fuselage. The pavement material is conveyed to the screw spreader at the rear of the machine by a conveyor arranged in each hopper and diffused in the width direction of the road surface, and at the same time, between the lanes arranged in the width direction of the road surface by a lane pulling unit movable with the machine body. In a conveyor transport structure in an asphalt finisher having a screed that forms each zone and spreads the pavement materials simultaneously, at least one of the conveyors arranged in the hopper has two transport paths, Distributing pavement material evenly to the two-way conveyance path A shape inclined cover and two partition plates formed at substantially the same position as the width of the mountain-shaped inclined cover for restricting the conveyance width of each of the two conveying paths to a constant position to the substantially end of the conveyor are provided. The asphalt finisher conveyor transport width regulation structure is provided.

  According to this configuration, a pavement material is formed by disposing a mountain-shaped inclined cover formed in a roof shape directly below the dropping port of the charging feeder above the conveyor conveyance path formed in two lines. Can be evenly distributed to the two conveying paths of the conveyor. The paving material prevents the two strips from falling to the central part of the conveyor by the constant width of the mountain-shaped inclined cover, and extends two partition plates to the approximate end of the conveyor in accordance with the width of the mountain-shaped inclined cover. By doing so, since each conveyance width | variety of a two-way conveyance path is restrict | limited to a desired fixed width | variety, a pavement material can be reliably conveyed to the predetermined zone between the lanes arranged in the left-right direction orthogonal to a running direction. As a result, the lane pulling box can be abolished without changing the conveyor, the carriage of the general-purpose asphalt finisher, and the surrounding structure, and the cost can be reduced, and each of the general-purpose parts Interchangeability can also be expected.

  The invention according to claim 2 is characterized in that the two partition plates are provided with partition plates that gradually reduce the transport width of the two transport paths toward the rear of the machine body at substantially the end of the conveyor. Provide a conveyor width control structure for asphalt finishers.

  According to this configuration, each conveyance width of the two conveyance paths of the conveyor can be easily changed from a desired constant width, so that a desired band between the lanes arranged in the left-right direction orthogonal to the traveling direction can be obtained. Even when there is a request for changing the width, the operation and effect of the above-mentioned claim 1 that the pavement material can be reliably conveyed can be achieved with a simple structure.

According to the first aspect of the present invention, the mountain-shaped inclined cover having a substantially constant width is disposed immediately below the dropping port of the charging feeder, and two partition plates are provided at substantially the same position as the width of the mountain-shaped inclined cover. Can be transported from the hopper to the end of the conveyor by limiting the transport width to a constant width. This makes it possible to transport the paving material to the required location while regulating the transport width of the two-way transport path formed on the conveyor to the desired width without changing the components of the conveyor in a general-purpose asphalt finisher. It becomes. In other words, by using the mountain-shaped inclined cover for regulating the conveyor conveyance width and the two partition plates, the conveyor structure of the general-purpose asphalt finisher can be used as it is, and the conveyance width of the paving material can be regulated. As a result, the components of the conveyor can be shared, and the risk of failure and the like can be reduced because there are no special components in the conveyor.
In addition, the lane pulling unit is appropriately attached to the front of the lane pulling unit so that the lane pulling box is included. However, since the lane pulling box can be eliminated, the structure can be simplified.

  According to the second aspect of the present invention, the two partition plates are provided with a partition plate that gradually reduces the width of the conveyance path at the substantially end of the conveyor. Even when requested, the paving material can be reliably conveyed to the receiving port of the screw spreader. This makes it possible to reliably spread and level the desired pavement material corresponding to each band between the lanes formed by the lane pulling unit.

1 is a schematic overall side view of an asphalt finisher to which the present invention is applied. The top view of an asphalt finisher same as the above shown in FIG. The partial top view of an asphalt finisher same as the above. The left view of the same asphalt finisher shown in FIG. FIG. 4 is a view taken along line AA in FIG. 3. The BB line arrow directional view of FIG. The CC arrow directional view of FIG. The schematic arrangement structure and operation explanatory drawing of a conveyor, a partition plate, and a partition plate seen from above. The schematic arrangement structure and operation | movement explanatory drawing of a conveyor, a partition plate, and a partition plate seen from the side. The perspective view and operation | movement explanatory drawing which show schematic structure of a partition plate and a partition board. The top view which looked at some rear structures in the conventional asphalt finisher from the upper part. FIG. 12 is a left side view of the rear structure shown in FIG. 11.

  According to the present invention, each pavement material dropped from the dropping port of the charging feeder installed in the airframe to the first hopper and the second hopper is conveyed to the screw spreader at the rear of the airframe by a conveyor disposed in each hopper. Asphalt finisher with screed that spreads each pavement material at the same time by forming each zone between lanes aligned in the width direction of the road surface by a lane pulling unit that can move with the aircraft at the same time In at least one of the conveyors arranged in the hopper, two conveyor paths are provided, and the conveyor is arranged just below the charging feeder drop port for evenly distributing the paving material to the two conveyor paths. And a mountain-shaped inclined cover having a substantially constant width, and the mountain shape for restricting the conveyance width of the two-way conveyance path to a constant value. It was achieved by providing an asphalt finisher conveyor conveying width regulating structure Shah, characterized in that substantially provided two partition plates formed to the end of the conveyor by the width substantially the same position of the inclined cover.

  Hereinafter, the asphalt finisher conveyor width regulation structure of the present invention will be described with reference to FIGS. 1 and 2 show an embodiment of an asphalt finisher to which the present invention is applied, FIG. 1 is a side view of the asphalt finisher, and FIG. 2 is a plan view of the asphalt finisher as viewed from above.

As shown in the figure, the asphalt finisher 10 includes a pair of left and right crawlers 11, 11.
And an engine 13 is mounted on the airframe 12. When the asphalt finisher 10 is self-propelled, the traveling motor 14 constituting the traveling device is rotated by the engine output of the engine 13, and the crawler 11 is driven to cause the airframe 12 to self-propel.

  The asphalt finisher 10 is provided with a plurality of hoppers for storing pavement materials and a pavement construction surface at the rear of the vehicle body so that two different types of pavement materials can be spread simultaneously in one pavement operation. And a leveling device are provided. That is, as shown in FIG. 1, a first hopper (hereinafter referred to as “front hopper”) 15 on which a pavement material having excellent wear resistance is mounted, for example, is provided at the front portion (left portion in the drawing) of the vehicle body 12. A second hopper (hereinafter referred to as “rear hopper”) 16 on which a normal inexpensive pavement material is mounted is provided at the rear upper portion of the front hopper 15.

  Further, on the front side of the machine body 12, an endless chain 20 wound through sprockets 19, 19 is provided at the front end of the pavement receiving hopper 17 and the upper end of the charging feeder 18. An endless chain 20 wound around a thrust plate 19a is provided at the lower end. These endless chains 20 are driven by a hydraulic motor constituting the feeder device by the engine output of the engine 13 to rotate the charging feeder 18 upward (right rotation in FIG. 1), and receive hoppers from a dump truck (not shown). The pavement material thrown into 17 is transferred above the charging feeder 18.

  Further, the charging feeder 18 is provided with a discharge port 21a that can be opened and closed in the middle of the transfer path. When the discharge port 21a is closed, all the pavement material transferred from the receiving hopper 17 is provided. It is transferred to the upper end of the charging feeder 18, and the pavement material is discharged from the discharge portion 21 b provided at the upper end and supplied to the rear hopper 16. On the other hand, when the discharge port 21a provided in the middle is opened, the pavement material transferred from the receiving hopper 17 is accommodated in the front hopper 15 from the discharge port 21a.

  Further, the charging feeder 18 is supported by the body 12 by a pivot pin 22 so as to be rotatable in the vertical direction. In addition, the folding portion 18a positioned above the portion connected by the pivot pin 22 is formed so as to be able to fall down by rotating downward. The charging feeder 18 is rotated in the vertical direction by the expansion and contraction of a rotating hydraulic cylinder 23 attached between the front upper portion of the fuselage 12 and the front lower portion of the charging feeder 18, and the folding portion 18a. The vertical rotation is operated by expansion and contraction of the upper-end folding hydraulic cylinder 24 attached between the main body 18b and the folding portion 18a.

  Then, as shown by the solid line in FIG. 1, the charging feeder 18 is held so that the folding portion 18a and the main body portion 18b are substantially straight by contracting the upper end side folding + hydraulic cylinder 24 as shown by a solid line in FIG. At the same time, the rotating hydraulic cylinder 23 is contracted until the front end roller 40 contacts the road surface, and the rear end side of the charging feeder 18 is lifted upward and held in an inclined state. On the other hand, when self-propelled on the road, as shown by a two-dot chain line in FIG. 1, the rotating hydraulic cylinder 23 is extended and inclined so that the front end side is largely lifted upward, and the upper end side folding hydraulic cylinder is 24 can be extended and folded down so that the folding portion 18a can be folded downward until it is substantially parallel to the road surface with respect to the main body portion 18b, thereby reducing the vehicle height so as not to hinder road driving. It can be done.

  Here, the pavement material dropped from the discharge port 21 a to the front hopper 15 by driving the charging feeder 18 is sent to the front screw spreader 25 by driving bar feeder conveyors 35, 35 disposed in the front hopper 15. It is diffused to the second zone outside the first zone at the center of the road pavement construction surface. The pavement material accommodated in the rear hopper 16 is sent to the rear screw spreader 28 by the drive of the screw conveyors 27 and 27 (see FIG. 2) and diffused in the width direction. It flows down from the central opening to the first zone in the center of the road pavement construction surface, and then flows down from the outer edge of the lane pulling unit 30 to the third zone outside the second zone, which will be described later, on the road surface. Can be spread. Then, the pavement material diffused in the second zone and the pavement material diffused in the first zone and the third zone are spread by the rear screeds 29 and 29 at the same time.

  Further, the lane pulling unit 30 described above is attached to the front surface of the rear screed 29 in the asphalt finisher 10 configured as described above, and the front hopper 15 is opened by an openable side plate provided in the lane pulling unit 30. The paving material and the paving material of the rear hopper 16 are partitioned so as not to be mixed.

  3 to 7 are views showing a main configuration of the asphalt finisher 10 to which the lane pulling unit 30 is attached, particularly a main configuration around the conveyor conveyance width regulating structure. FIG. 3 is a partial plan view of the asphalt finisher. 4 is a left side view of the asphalt finisher shown in FIG. 3, FIG. 5 is a view taken along the line AA in FIG. 3, FIG. 6 is a view taken along the line BB in FIG. 3, and FIG. FIG.

  As shown in FIG. 3, the conveyors 35, 35 for conveying the pavement material of the front hopper 15 to the rear of the machine body are the central zone (first zone) of the road surface zones arranged in the left-right direction perpendicular to the traveling direction of the asphalt finisher 10. ) And the left and right second zones (i.e., the heel zone) of the central zone, two strips are arranged at regular intervals in the left-right direction of the airframe 2 so as to drop the pavement material. Thereby, the positions of the left and right second bands of the pavement material spread by the front screw spreader 25 substantially coincide with the band positions regulated by the lane pulling unit 30, and the band forming work can be facilitated.

  Here, in order to limit the two conveying widths of the conveyors 35, 35, as shown in FIG. 5, near the lower central portion of the front hopper 15, that is, directly below the outlet of the charging feeder 18, the gable roof of the house In this way, a mountain-shaped inclined cover 61 that is inclined in the shape of a “he” in both the left and right directions is arranged. The mountain-shaped inclined cover 61 regulates the falling width so that the pavement material from the first hopper 15 slides down the inclined portion of the mountain-shaped inclined cover 61 and falls into the two conveying width regions of the conveyors 35 and 35. doing. As shown in FIG. 3, the mountain-shaped inclined cover 61 is disposed between a and c in the flow direction of the conveyors 35 and 35 in the opening region of the front hopper 15, and from the a side to the c side. It is inclined and arranged so as to be higher.

Furthermore, as shown in FIG. 6, in the vicinity of the lower central part of the conveyors 35, 35, while the pavement material is being transported by the conveyors 35, 35, the conveyors are maintained at a constant width. The partition plates 62 and 62 are provided with a width substantially equal to the width of the bottom surface of the mountain-shaped inclined cover 61 with the central region of 35 and 35 interposed therebetween. As shown in FIG. 3, the partition plates 62, 62 have a width ab along the conveyors 35, 35 on both sides of the central region of the conveyors 35, 35 and the same width as the bottom surface width of the mountain-shaped inclined cover 61. It is provided in between.
In addition, since the space between c and b is a tunnel space constituting the airframe formed behind the hopper 15, the composite material does not fall, so the mountain-shaped inclined cover 61 is not necessary between c and b.
Further, the partition plates 62, 62 are provided at the end portions of the partition plates 62, 62, that is, the front portion of the front screw spreader 25, which is substantially the end of the conveyors 35, 35, as shown in FIGS. As shown in FIG. 4, partition plates 63 and 63 are provided for gradually reducing the transport width of the two transport paths toward the rear of the machine body 12.

  8 and 9 schematically show the arrangement structure of the conveyors 35, 35 and the partition plates 62, 62 and the partition plates 63, 63, and FIG. 10 shows the schematic arrangement structure of the partition plates 62, 62 and the partition plates 63, 63. It is a perspective view shown.

  The structure of the partition plates 63, 63 will be further described with reference to FIGS. 8 to 10. The partition plates 63, 63 protrude toward the conveyors 35, 35 (second band side) at the end portions of the partition plates 62, 62. It is formed in a wedge shape in a plan view in which a maximum projecting portion is provided at the end portion and the conveyor conveyance width is gradually reduced toward the rear. Further, on the partition plates 63 and 63, guide members 64 and 64 that guide the pavement material that is sent to the end portions of the conveyors 35 and 35 and falls on the road surface G are surfaces and end surfaces that face the conveyors 35 and 35. It hangs down toward the road surface G.

  In the partition plates 63 and 63 and the guide members 64 and 64 configured as described above, the pavement material is the end of the conveyors 35 and 35 as indicated by arrows in FIGS. 8 to 10. When it is sent to the vicinity of the part, the pavement material is brought closer to the second zone due to the restriction by the inclined surfaces of the partition plates 63, 63, and the pavement material is not allowed to flow toward the first zone by the guides of the guide members 64, 64. To the second zone of the road surface G.

Therefore, in the conveyor conveyance regulation structure of the present embodiment, the two conveyance widths of the conveyors 35, 35 are limited by the mountain-shaped inclined cover 61 and the partition plates 62, 62, and further the partition plates 63, 63 are added. By restricting more greatly, the paving material can be transported with a transport width adapted to the bandwidth of the kite using the conventional conveyor as it is without changing the conveyor structure of the general-purpose asphalt finisher 10.

  In addition, if the conveyor transport regulation structure of the present embodiment is applied to an asphalt finisher, it is possible to use an asphalt finisher in which each component (part) of the conveyor portion of the general-purpose asphalt finisher 10 can be used, and to draw lanes. Since the box 103 can be abolished, the special structures of the conveyors 35 and 35 are eliminated, and the cost of the asphalt finisher 10 can be reduced. In addition, the risk of failure and the like can be reduced.

  As mentioned above, although the Example of the structure and operation | movement of the conveyor conveyance width control structure in the asphalt finisher concerning this invention was demonstrated in detail, this invention is not limited to the said Example, unless it deviates from the mind of this invention. It will be appreciated that various modifications can be made and that the invention extends to such modifications.

  The present invention can also be applied to an asphalt finisher not equipped with a charging feeder.

10 asphalt finisher 15 front hopper 16 rear hopper 17 receiving hopper 18 charging feeder 25 front screw spreader 27 screw conveyor 28 rear screw spreader 29 rear screed 30 lane drawing unit 43 side plate 45 substantially V-shaped groove 61 mountain shape Inclined cover 62 Partition plate 63 Screen plate

Claims (2)

In the width direction of the road surface, each pavement material that has fallen from the dropping port of the charging feeder installed in the airframe to the first hopper and the second hopper is conveyed to the screw spreader at the rear of the airframe by a conveyor disposed in each hopper. Conveyor transport structure in asphalt finisher with screed that spreads and leveles each pavement material at the same time by forming each zone between lanes aligned in the width direction of the road surface by lane pulling unit that can be diffused and moved with the aircraft at the same time In
At least one of the conveyors arranged in the hopper is provided with two conveying paths, and a mountain having a substantially constant width disposed immediately below the dropping port of the charging feeder that evenly distributes the paving material to the two conveying paths. Shape-inclined cover,
An asphalt finisher comprising two partition plates formed substantially at the same position as the width of the mountain-shaped inclined cover for restricting the conveyance width of the two-way conveyance path to a substantially final end of the conveyor. Conveyor transport width regulation structure. Wherein the two partition plates, asphalt finisher according to claim 1, wherein the substantially at the end of the conveyor provided with a partition plate for gradually reducing toward the conveying width of the conveying path of the two articles in the machine body backward Conveyor transport width regulation structure.