JP2010031534A - Paving material gate mechanism of charging feeder - Google Patents

Abstract

An object of the present invention is to prevent one of a lower pavement material and an upper pavement material from mixing with the other and improve pavement finish.
In the charging feeder 18, a transport chain 22 to which a flight bar 25 is attached is provided, and a gate member 34 is attached to a second drop port 27 of the charging feeder 18 so as to be opened and closed. Further, the vertical cross-sectional shape of the gate member 34 is formed in a substantially J-shape having an arc portion that follows the outer peripheral edge of the rotating portion of the transport chain 22 hung around the upper sprocket wheel 24. Further, the gap between the gate member 34 and the transport chain 22 is set to be approximately equal to the height dimension of the flight bars 25, 25... So that the paving material does not stay and accumulate in the gap.
[Selection] Figure 3

Description

  The present invention relates to a paving material gate mechanism for a charging feeder, and more particularly to a paving material gate mechanism for a charging feeder mounted on a self-propelled paving machine that spreads two kinds of paving materials in two layers. It is.

  Conventionally, when two types of pavement material are spread simultaneously on the upper and lower two layers in a single pavement operation, a multi-asphalt paver equipped with a receiving hopper, two types of hoppers and a leveling device (self-propelled paving machine) ) Is used. The multi-asphalt paver is mounted with a charging feeder for transferring the pavement so as to incline upward in the rearward direction, and the front end of the charging feeder is connected to a receiving hopper. The pavement material thrown into the receiving hopper is transferred to the rear of the machine body by the charging feeder, and loaded on the front hopper for the lower pavement material or the rear hopper for the upper pavement material.

  Thus, the pavement material loaded in the front hopper or the rear hopper is conveyed to the rear of the machine body by the screw conveyor, and then diffused to the construction surface by the front screw spreader or the rear screw spreader, and the front screed or rear Leveled by side screed.

  In the charging feeder, a transport chain is provided between the lower sprocket wheel and the upper sprocket wheel. Further, a first dropping port and a second dropping port are formed in the vicinity of the middle and upper end portions of the charging feeder, respectively, and the first dropping port and the second dropping port are upper portions corresponding to the front hopper and the rear hopper. It is arranged at each position.

Thus, when the transport chain is driven to rotate, the pavement material in the receiving hopper is transferred to the first drop port or the second drop port of the charging feeder, and the pavement material is transferred from the first drop port or the second drop port. Falls and is accommodated in the front hopper or the rear hopper (see, for example, Patent Document 1).
Japanese Patent No. 2994617

  As a charging feeder according to the above prior art, a lowering method in which the pavement material is scratched along the lower plate of the charging feeder and transferred to the dropping port, or the upper end of the charging feeder along the upper plate of the charging feeder An uplifting method has been developed in which the pavement material is transported to the drop opening after it has been transported.

  FIG. 5 shows a paving material gate mechanism provided at the upper part of the rear end side of the upper charging charging feeder 1. As shown in the figure, inside the charging feeder 1 is provided an endless transport chain 3 in which a plurality of flight bars 2, 2... Are suspended at a predetermined interval, and the transport chain 3 is connected to the lower sprocket wheel ( (Not shown) and the upper sprocket wheel 4.

  A second drop port 5 is formed in the lower plate near the upper end of the charging feeder 1, and the second drop port 5 is disposed at an upper position corresponding to the rear hopper (not shown). .

  Further, a gate member 6 for an upper pavement material is attached to the second drop port 5 so as to be openable and closable, and the vertical cross-sectional shape of the gate member 6 is formed in an L shape having a right angle portion. Therefore, between the inner surface of the gate member 6 and the outer periphery of the rotating portion of the transport chain 5, a substantially wedge-shaped or right-angled triangular space portion is generated in a longitudinal sectional view.

  As a result, when the transport chain 3 is rotationally driven in one direction (clockwise direction R in FIG. 5) during the transfer of the pavement material, there is a region where the flight bars 2, 2. Therefore, the pavement material H stays in the region and the pavement material H is deposited on the gate member 6.

  Therefore, for example, when the upper pavement material is transferred, if the gate member 6 of the second drop port 5 is opened, the lower pavement material H deposited on the upper surface of the gate member 6 falls from the second drop port 5 as shown in FIG. Then, it is accommodated in the rear hopper for the upper pavement material. As a result, the lower pavement material is mixed into the upper pavement material in the rear hopper.

  Another factor that causes one of the upper pavement material and the lower pavement material to mix with the other is the phenomenon of the pavement adhering to the transport chain. That is, for example, the upper pavement material staying in the space between the gate member 6 for the upper pavement material and the transport chain 5 adheres to the transport chain 5 and is transferred to the first drop port for the lower pavement material. 1 The upper pavement material falls from the drop opening, and the upper pavement material is mixed into the lower pavement material in the front hopper.

  In this way, if one of two pavement materials with different particle sizes or properties is mixed with the other, the lower pavement material with a larger particle size is mixed with the upper pavement material with a smaller particle size, leading to poor pavement and paving finish. There was a problem that decreased.

  Therefore, a technical problem to be solved in order to prevent one of the lower pavement material and the upper pavement material from being mixed with the other and improve the paving finish, and the present invention solves this problem. For the purpose.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a receiving hopper installed in a self-propelled paving machine that spreads two kinds of pavement materials in two upper and lower layers, The front end portion of the charging feeder that is inclined upward toward the rear is connected, and the lower side of the first and second drop ports formed in the vicinity of the middle portion and the upper end portion of the charging feeder are for lower layer pavement materials. In the paving material gate mechanism of the charging feeder, in which the front hopper and the rear hopper for the upper pavement material are respectively disposed, and the gate member is attached to the second drop port so as to be opened and closed. The vertical cross-sectional shape is formed in a curved shape having an arc portion that follows the outer peripheral edge of the rotating portion of an endless transport chain that is wound around the upper sprocket wheel in the charging feeder, and the gate The gap between the arc portion of the material and the outer peripheral edge of the rotating portion of the transport chain is set to be substantially equal to the height dimension of the flight bar attached to the transport chain, and the paving material is transferred when the paving material is transferred. Provides a paving material gate mechanism for a charging feeder configured so as not to stay in the gap.

  According to this configuration, the gate member for the upper pavement material attached to the second dropping port of the charging feeder is formed in a curved shape having an arc portion that follows the outer peripheral edge of the rotating portion of the transport chain with the flight bar, and By setting the gap between the arc part of the gate member and the outer peripheral edge of the rotating part of the transport chain to be substantially the same as the height dimension of the flight bar, the pavement material stays in the gap when the pavement is transferred. Is prevented. Therefore, for example, since the lower layer pavement material does not accumulate on the inner surface of the gate member, when the gate member is opened, there is no possibility that the lower layer pavement material falls from the second drop port and is accommodated in the rear hopper.

  Since the invention according to claim 1 can prevent the pavement material from staying and accumulating in the gap between the gate member and the transport chain, it can reliably prevent one of the lower layer pavement material and the upper layer pavement material from being mixed into the other. Therefore, the paving finish can be remarkably improved as compared with the conventional example.

  In order to achieve the object of improving the paving finish by preventing one of the lower pavement material and the upper pavement material from mixing with the other, the present invention spreads two types of pavement materials in two upper and lower layers. A receiving hopper installed on the self-propelled paving machine is connected to a front end portion of a charging feeder that is inclined upward toward the rear, and a first dropping port and a first outlet formed in the vicinity of an intermediate portion and an upper end portion of the charging feeder, respectively. (2) A front hopper for a lower pavement material and a rear hopper for an upper pavement material are disposed below the drop opening, and a gate member is attached to the second drop opening so as to be openable and closable. In the feeder paving material gate mechanism, the vertical cross-sectional shape of the gate member follows the outer periphery of the rotating portion of the endless transport chain that is wound around the upper sprocket wheel in the charging feeder. It is formed in a curved shape having an arc portion, and the gap between the arc portion of the gate member and the outer peripheral edge of the rotating portion of the transport chain is substantially equal to the height dimension of the flight bar attached to the transport chain. This was realized by configuring so that the paving material does not stay in the gap during the transfer of the paving material.

  A preferred embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view showing a multi-asphalt paver 10 having a paving material gate mechanism of a charging feeder. The multi-asphalt paver 10 has a lower pavement material H1 so that two types of lower pavement material H1 and upper pavement material H2 (asphalt mixture) can be laid simultaneously in two upper and lower layers in one paving operation. Each hopper and a leveling device for accommodating the upper pavement material H2 are provided.

  As shown in the figure, an engine 13 is mounted on the front portion of a vehicle body 12 that is self-propelled by a crawler 11, and a front hopper 15 is provided on the front side (left side in the figure) of the engine 13. A rear hopper 16 is provided behind the front hopper 15 in the vehicle body 12, and the rear hopper 16 is disposed at a position higher than the front hopper 15 by a predetermined dimension.

  As shown in FIG. 2, a receiving hopper 17 is provided in front of the front hopper 15 of the vehicle body 12, and a lower pavement material H1 or an upper pavement material H2 is input into the receiving hopper 17 by a dump truck or the like. Further, a charging feeder 18 is disposed behind the receiving hopper 17, and a front portion of the charging feeder 18 is connected to a lower portion of the receiving hopper 17. The charging feeder 18 is installed so as to incline upward at a predetermined angle from the front end portion toward the rear end portion.

  An intermediate lower portion of the charging feeder 18 is supported by the vehicle body 12 by a pivot pin 19 and is provided so as to be able to tilt up and down around the pivot pin 19 as a rotation center. Further, the connecting portion of the pivot pin 19 is provided so as to be exposed to the outside of the house cover 20 disposed above the engine 13. Therefore, the charging feeder 18 can be easily detached from the vehicle body 12 by pulling out and inserting the pivot pin 19 outside the house cover 20.

  The charging feeder 18 is provided with an endless transport chain (charging chain) 22 that functions as a flight conveyor. The transport chain 22 includes a driven-side lower sprocket wheel 23 and a drive-side upper sprocket wheel 24. It is spanned between. Further, a large number of flight bars 25, 25... Are fixed to the transport chain 22 at a substantially right angle, and the flight bars 25, 25. Therefore, when the transport chain 22 is rotationally driven by the drive motor 14, the lower pavement material H <b> 1 or the upper pavement material H <b> 2 in the receiving hopper 17 is transferred upward along the charging feeder 18.

  Further, a first drop port 26 is formed in a lower surface portion (lower plate portion) in the vicinity of the central portion of the charging feeder 18 in the front-rear direction, and the first drop port 26 is disposed at an upper position corresponding to the front hopper 15. ing. Further, a second drop port 27 is formed in the lower surface portion near the rear upper end of the charging feeder 18, and the second drop port 27 is disposed at an upper position corresponding to the rear hopper 15.

  Accordingly, when the upper pavement material H2 is put into the receiving hopper 17, the first drop port 26 is closed, and the second drop port 27 is opened, the transport chain 22 is rotationally driven. Is transferred to the second drop port 27 on the upper end side of the charging feeder 18, discharged downward from the second drop port 27, and accommodated in the rear hopper 16.

  On the other hand, when the lower pavement material H1 is introduced into the receiving hopper 17, the second drop port 27 is closed, and the first drop port 26 is opened, the transport chain 22 is rotationally driven. H1 is transferred to the first drop port 26 in the middle of the charging feeder 18, discharged downward from the first drop port 26, and accommodated in the front hopper 15.

  Further, a first screw conveyor (not shown) and a second screw conveyor 29 are provided in the lower part of the vehicle body 12, and the first screw conveyor and the second screw conveyor 29 are respectively connected to the front hopper 15 and the rear hopper 16. It is arranged at the corresponding location.

  Further, a leveling means for the lower layer pavement material is disposed on the rear end side of the first screw conveyor, and the leveling means includes a front screw spreader 30 for diffusing the lower level pavement material H1 to the construction surface, It consists of a front screed 31 that spreads and spreads the diffused lower layer pavement material H1 on the construction surface.

  Therefore, the lower layer pavement material H1 accommodated in the front hopper 15 is conveyed to the front screw spreader 30 by the rotational drive of the first screw conveyor, diffuses to the construction surface of the road, and is spread by the front screed 31.

  Further, a leveling means for the upper pavement material is disposed on the rear end side of the second screw conveyor 29, and the leveling means includes a rear screw spreader 32 that diffuses the upper pavement material H2 on the construction surface, and And a rear screed 33 that spreads and spreads the diffused upper pavement material H2 on the construction surface.

  Therefore, the upper pavement material H2 accommodated in the rear hopper 16 is transported to the rear screw spreader 32 by the rotational drive of the second screw conveyor 29, diffused to the construction surface of the road, and constructed by the rear screed 33. It is spread on the surface.

  FIG. 3 shows a specific example of the paving material gate mechanism of the charging feeder 18. As shown in the figure, a second drop port 27 is formed in the vicinity of the lower corner of the rear end of the charging feeder 18, and a gate member 34 for an upper pavement material is formed in the second drop port 27. It is attached so that it can be opened and closed.

  Further, the vertical cross-sectional shape of the gate member 34 is formed in a substantially J shape in the horizontal direction, and an arc portion 34a corresponding to the arc portion of the outer peripheral edge of the rotating portion of the transport chain 22 wound around the upper sprocket wheel 24; The straight portion 34b is continuous with the lower end of the portion, and the straight portion 34b extends in parallel to the inclined direction of the transport chain 22 (see FIG. 4).

  Further, the gap between the inner surface of the gate member 34 and the outer peripheral edge of the transport chain 22 is set to be approximately equal to the height dimension of the flight bars 25, 25. Therefore, substantially the entire space of the space between the upper pavement gate member 34 and the transport chain 22 becomes a passage region for the flight bars 25, 25... That move as the transport chain 22 rotates.

  Therefore, for example, when the lower layer pavement material H1 is transferred by rotating the conveyance chain 22 clockwise (clockwise direction R in FIG. 3), the lower layer pavement material H1 does not stay in the space portion. There is no possibility that the lower pavement material H1 is deposited on the gate member 34.

  As described above, according to the present invention, since the lower layer pavement material H1 does not stay and accumulate on the gate member 34, for example, loading of the lower layer pavement material H1 into the front hopper 15 is completed, as shown in FIG. Thereafter, when the upper layer pavement material H2 is loaded on the rear hopper 16, even if the gate member 34 of the second drop port 27 is opened, the lower layer pavement material H1 may fall from the second drop port 27 as in the conventional example. Is prevented.

  Further, since the upper pavement material H2 or the lower pavement material H1 does not stay in the gap between the gate member 34 and the transport chain 22, for example, there is no possibility that the upper pavement material H2 adheres to the transport chain 22. Accordingly, the upper pavement material H2 together with the lower layer pavement material H1 from the first drop opening 26 is prevented from falling and being accommodated in the front hopper 15.

  Thus, it is possible to reliably prevent one of the lower pavement material H1 and the upper pavement material H2 from being mixed with the other in the front hopper 15 or the rear hopper 16, and remarkably improve the pavement finish.

  It should be noted that 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.

The partially cutaway side view of the multi asphalt paver provided with the paving material gate mechanism of the charging feeder according to one embodiment of the present invention. The top view which shows the various hoppers, screw conveyor, etc. which were mounted in the multi asphalt paver of FIG. The side view which shows the rear-end part of the charging feeder of the state by which the 2nd fall opening which concerns on one Example of this invention was closed. The side view which shows the charging feeder rear end part of the state by which the 2nd fall opening of FIG. 3 was open | released. The side view which shows the charging feeder rear end part of the state by which the 2nd fall port which concerns on a prior art example was closed. The side view which shows the rear-end part of the charging feeder of the state by which the 2nd drop port which concerns on a prior art example was open | released.

Explanation of symbols

10 Multi-asphalt paver (self-propelled paving machine)
15 Front hopper (Lower pavement hopper)
16 Rear hopper (hopper for upper pavement material)
17 receiving hopper 18 charging feeder 22 transport chain 23 lower sprocket wheel 24 upper sprocket wheel 25 flight bar 26 first drop port 27 second drop port 29 second screw conveyor 30 front screw spreader 31 front screed 32 rear screw spreader 33 rear Side screed 34 Gate member for upper pavement material 34a Arc part

Claims (1)

A receiving hopper installed on a self-propelled paving machine that spreads two types of pavement materials in two layers, upper and lower, is connected to the front end portion of the charging feeder that is inclined upward toward the rear, and an intermediate portion of the charging feeder and A front hopper for a lower pavement material and a rear hopper for an upper pavement material are respectively disposed below the first drop port and the second drop port formed in the vicinity of the upper end, respectively, and the second drop In the paving material gate mechanism of the charging feeder, which has a gate member attached to the mouth so that it can be opened and closed,
The vertical cross-sectional shape of the gate member is formed in a curved shape having an arc portion that follows the outer peripheral edge of the rotating portion of the endless transport chain that is wound around the upper sprocket wheel in the charging feeder,
The gap between the circular arc part of the gate member and the outer peripheral edge of the rotating part of the transport chain is set to be substantially equal to the height dimension of the flight bar attached to the transport chain, and when the paving material is transferred, A paving material gate mechanism for a charging feeder, wherein the paving material does not stay in the gap.

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