JP2012031576A - Fuel tank structure of road paving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel tank structure of a road paving machine capable of securing a tank capacity by effectively utilizing a gap between a carriage process side and a return process side in a chain conveyor by loading a fuel tank in the gap, and surely sucking up fuel inside the tank from a suction pipe even when the situation of the fuel inside the tank is substantially changed accompanying the change of the inclination angle of a machine main body during execution and during loading onto a trailer or the like after the end of the execution.SOLUTION: In the fuel tank structure of the road paving machine, the tank capacity is secured by loading a fuel tank 12 in a gap between a carriage process side 6and a return process side 6in a chain conveyor 6 in a two-line type structure having an inter-line part of an appropriate interval, the fuel tank 12 has a deep bottom part 12a formed by projecting a bottom part corresponding to the inter-line part in the chain conveyor 6 of the two-line type structure, and the suction port of a suction pipe for sucking the fuel inside the fuel tank 12 is made to face the deep bottom part 12a.

Description

  The present invention relates to a fuel tank structure for a road paving machine, and in particular, effectively uses a dead space in the machine main body, and installs a fuel tank in the dead space to secure a tank capacity and at the time of construction and completion of construction. A road that allows fuel in the tank to be reliably sucked up from the suction pipe even when the state of fuel in the tank changes drastically due to changes in the tilt angle of the machine body during loading on a trailer, etc. The present invention relates to a fuel tank structure for a paving machine.

  Conventionally, for example, an arrangement structure of a power unit and an emulsion tank in the following spreader machine is known. In this prior art, the power unit is provided after the composite hopper at the front of the traveling vehicle. An emulsion tank having a height higher than that of the power unit is provided between the power unit and the driver's seat. When the emulsion tank is empty, the position of the center of gravity of the spreading machine is a plan view of the traveling vehicle. It is configured to be set at substantially the center of the front and rear and the left and right of the device. Further, an emulsion spraying mechanism for spraying asphalt emulsion supplied from the emulsion tank on the roadbed is provided behind the traveling vehicle. And since the center of gravity when the emulsion tank is emptied is set at the center of the front and rear and the left and right of the traveling device of the traveling vehicle, it is spread using the inclined plate and the machine is loaded on the trailer or lowered In such a case, it is said that the work can be performed quickly and efficiently without breaking the posture. FIG. 2 of the publication in which the above-described prior art is described further includes a two-story system having inter-space portions with appropriate intervals for transporting the asphalt composite material received by the composite material hopper to the rear side of the traveling vehicle. A structured conveyor is described (see, for example, Patent Document 1).

  As another conventional technique, for example, the following spreader machine is known. This prior art includes a lower hopper mounted on the front side of a self-propelled vehicle for storing asphalt mixture, an upper hopper mounted on the rear side of the lower hopper for storing asphalt mixture, and asphalt supplied from the lower hopper. Lower screw that spreads the mixture left and right, lower screed that spreads the asphalt mixture spread by the lower screw, and upper screw that spreads the asphalt mixture supplied from the upper hopper to the left and right behind the lower screed And an upper screed that spreads the asphalt mixture spread by the upper screw, and further, a water tank or a hydraulic oil tank is disposed as a counterweight in front of the lower hopper. Since the water tank or the hydraulic oil tank is disposed in front of the composite hopper as a counterweight, the center of gravity of the spreading machine acts near the center of the crawler of the self-propelled vehicle. Therefore, the leveling machine can perform leveling work with a stable weight balance. When the counterweight is a water tank, the action as the counterweight can be increased or decreased by increasing or decreasing the water. For example, when loading and unloading machinery on a trailer, water easily obtained at the construction site is appropriately poured into the water tank so that the water tank acts as a counterweight and balances the weight. It can be adjusted accurately. Therefore, it is possible to easily spread and load the machine on the trailer in a stable state or to unload the machine (see, for example, Patent Document 2).

Japanese Patent No. 3522521 JP 2003-119716 A

  In the prior art described in Patent Document 1, an emulsion tank is provided between the power unit and the driver's seat, and an emulsion spray for spraying asphalt emulsion supplied from the emulsion tank on the roadbed is provided behind the traveling vehicle. A mechanism is provided. In addition, the center of gravity when the emulsion tank is emptied after the completion of construction is set at the center of the front and rear of the traveling device and the left and right, so if you use a sloping plate and load the machine on the trailer, It is said that the work can be done quickly and neatly without breaking down.

  In the prior art described in Patent Document 2, a lower layer hopper and an upper layer hopper are mounted on the front side of the self-propelled vehicle, and a lower layer screw and a lower layer screed, and an upper layer screw and an upper layer screed are disposed on the rear side of the self-propelled vehicle. Equipped. Furthermore, when the leveling machine is loaded onto the trailer using an inclined plate after the construction is completed, the work is performed in a stable state by adjusting the weight balance by appropriately pouring water into a water tank as a counterweight. You can do that.

  As described above, in the prior arts described in Patent Documents 1 and 2, after the completion of construction, it is stabilized by adjusting the weight balance of the traveling device when spreading the machine using the inclined plate and loading the machine onto the trailer. You can work in the state.

  By the way, in addition to adjusting the weight balance of the traveling device as described above, in order to perform the work of loading the leveling machine after the completion of construction into the trailer in a stable state, the engine that is the power source of the traveling device It is important that the required amount of remaining fuel is secured in the fuel tank so that the remaining fuel in the fuel tank is sucked up and supplied to the engine. It is.

  However, in addition to the basic functions as a road paving machine, the special road paving machine has an emulsion spreading mechanism described in Patent Document 1, a lower layer hopper, an upper layer hopper, a lower layer screw, an upper layer screw, and a lower layer screed described in Patent Document 2. In addition, special machine-specific mechanisms such as upper-layer screed are installed. For this reason, the space inside the vehicle body is narrowed, a sufficient fuel tank space cannot be obtained, and it is difficult to secure the capacity of the fuel tank.

  On the other hand, for example, as shown in FIGS. 7 (a) and 7 (b) and FIGS. 8 (a) and 8 (b), the transport stroke side and the return stroke that have not been used so far in a chain conveyor (not shown). It is conceivable that a sub fuel tank 16 is mounted in the gap by effectively utilizing a gap (dead space) between the sides, and a required tank capacity is secured by the sub fuel tank 16 and the main fuel tank 15. . The sub fuel tank 16 is formed in a thin shape so as to be mounted in the gap between the transport stroke side and the return stroke side of the chain conveyor, and as shown in FIGS. 7A and 7B, the chain conveyor 16 It is mounted with a slight forward tilt at an angle corresponding to the tensioning mode. The main fuel tank 15 and the sub fuel tank 16 formed in a thin shape are mounted inside the vehicle body with the main fuel tank 15 positioned on the upper side and the sub fuel tank 16 positioned on the lower side, and integrated with the communication pipe 17. The fuel tanks 15 and 16 function as one fuel tank.

  Then, the remaining fuel when the spreader is loaded on the trailer using the inclined plate after the completion of construction is accommodated in the sub fuel tank 16 located on the lower side, as shown in FIG. 7 (b). Is done. However, in the structure in which the sub fuel tank 16 is thin and is formed in an ordinary simple box shape, and the suction pipe 18 for sucking the fuel in the tank is merely inserted, the leveling machine is flat. The inclination angle during construction (states (a) and (b) in FIG. 7) and the inclination angle when loading the trailer after construction (states (a) and (b) in FIG. 8) If the situation of the fuel in the sub fuel tank 16 changes and the suction port of the suction pipe 18 is brought forward in the fuel tank 16 so that the fuel suction does not become insufficient during construction on flat ground ((a in FIG. 7 ), (B)), when loading on the trailer after completion of construction ((a), (b) in FIG. 8), the fuel sucking is insufficient, and the leveling machine is tilted during loading. Sometimes it is dangerous to run out of fuel to the engine.

  In addition, if the intake port of the suction pipe 18 is brought behind the fuel tank 16 in consideration of the time of loading on the trailer after the completion of construction, a large amount of fuel cannot be sucked from the fuel tank 16 during normal flat ground construction. As a result, the number of times of refueling increases, the necessity of refueling on the way of construction at the construction site, and the like, leading to deterioration in operating efficiency.

  Therefore, the gap between the transfer stroke side and the return stroke side in the chain conveyor is effectively used, and a fuel tank is installed in the gap to secure the tank capacity and the machine at the time of construction and loading into the trailer after completion of construction, etc. There arises technical problems to be solved in order to ensure that the fuel in the tank can be sucked up from the suction pipe even when the fuel condition in the tank changes significantly with the change in the inclination angle of the main body. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above-mentioned object, and the invention according to claim 1 is a two-row structure having an inter-space portion with an appropriate interval received by a composite hopper at the front of the machine body. A fuel tank structure for a road pavement machine that spreads asphalt mixture conveyed to the rear of the machine main body with a chain conveyor on a roadbed with a screed while spreading with a screw, and includes a transfer stroke side and a return stroke on the chain conveyor. A fuel tank is installed in a gap between the sides to secure a tank capacity, and the fuel tank projects a bottom portion corresponding to the inter-strip portion in the chain conveyor having the two-row structure to form a deep bottom portion, Provided is a fuel tank structure for a road pavement machine in which a suction port of a suction pipe that sucks up fuel in a fuel tank faces the deep bottom portion.

  According to this configuration, as a dead space in the machine body, the gap between the transport stroke side and the return stroke side in the chain conveyor that has not been used so far is effectively used, and a fuel tank is mounted in this gap. The required tank capacity is secured. Since the fuel tank is mounted in the gap between the transport stroke side and the return stroke side in the chain conveyor, the shape is thin. For this reason, due to changes in the inclination angle of the machine body during construction of road paving machines and when loading on trailers using inclined plates after completion of construction, the state of fuel suction in the tank by the suction pipe is greatly increased. Easy to change. On the other hand, the fuel tank has a bottom portion that protrudes from the bottom portion that does not interfere with the chain conveyor to form a deep bottom portion, and the suction port of the suction pipe faces the deep bottom portion. In this way, even when the road pavement machine is loaded into the trailer using the inclined plate after the construction is completed, even if the remaining fuel is reduced, the remaining fuel is accumulated in the deep bottom and can be reliably sucked up from the suction pipe. The engine can be operated.

  According to a second aspect of the present invention, there is provided a fuel tank structure for a road pavement machine according to the first aspect of the invention, wherein the fuel tank is inclined forward at an angle corresponding to a tensioning mode of the chain conveyor.

  According to this configuration, even when the fuel tank is tilted forward at an angle corresponding to the tensioning state of the chain conveyor during construction of the road paving machine, the fuel in the tank is reliably secured by the suction pipe with the suction port facing the deep bottom. It is possible to suck up. In addition, when the road paving machine is loaded on the trailer using the inclined plate after the construction is completed, the fuel tank is corrected in its forward leaning posture, so that the remaining fuel can be removed even if the remaining fuel is reduced. It is possible to reliably suck up from the suction pipe.

  The invention according to claim 1 ensures the required tank capacity by effectively using the gap between the transfer stroke side and the return stroke side in the chain conveyor that has not been used until now, and mounting a fuel tank in this gap. can do. In addition, the fuel tank has a deep bottom that protrudes from the bottom part that does not interfere with the chain conveyor, and the suction port of the suction pipe faces the deep bottom. There is an advantage that even if the remaining fuel is reduced, for example, when the vehicle is loaded on the trailer, the remaining fuel is collected in the deep bottom portion, so that it can be reliably sucked up by the suction pipe.

  In addition to the effect of the invention of the first aspect, the invention described in claim 2 further corrects the forward leaning posture of the fuel tank when the road paving machine is loaded onto the trailer using the inclined plate after completion of construction. Thus, there is an advantage that even if the remaining fuel is reduced, the remaining fuel can be reliably sucked up from the suction pipe.

The side view of the road paving machine carrying the fuel tank structure which concerns on the Example of this invention. The top view of FIG. The enlarged side view of the fuel tank structure part mounted in the road paving machine of FIG. The expanded sectional view which follows the XX line in FIG. It is a figure which shows the state of the fuel-tank structure part at the time of the road pavement machine of FIG. It is a figure which shows the state of the fuel-tank structure part at the time of construction of the inclined surface of the road paving machine of FIG. 1, or the loading work to a trailer, (a) is an enlarged side view, (b) is a partial cross section enlarged side view. . It is a figure which shows the state of the conventional fuel tank structure part when a road paving machine is construction of a flat ground, (a) is an enlarged side view, (b) is a partial cross section enlarged side view. It is a figure which shows the state of the conventional fuel tank structure part at the time of construction of the inclined surface of a road paving machine, or the loading operation to a trailer, (a) is an enlarged side view, (b) is a partial cross section enlarged side view.

  The present invention effectively uses the gap between the transport stroke side and the return stroke side in the chain conveyor, and installs a fuel tank in the gap to secure the tank capacity and at the time of construction and when loading the trailer after completion of construction, etc. In order to achieve the object of enabling the fuel in the tank to be reliably sucked up from the suction pipe even when the state of the fuel in the tank greatly changes with the change in the inclination angle of the machine body in The asphalt composite material received by the composite material hopper at the front part of the machine main body and transported to the rear part of the machine main body with a two-strand structure chain conveyor having inter-space portions with appropriate intervals is spread with a screw while spreading with a screed. A fuel tank structure for a road pavement machine spread on the road, wherein a fuel tank is mounted in the gap between the transport stroke side and the return stroke side of the chain conveyor. The capacity of the fuel tank is ensured, and the bottom of the fuel tank is protruded from the bottom corresponding to the space between the two-type chain conveyor to form a deep bottom, and the suction pipe sucks up the fuel in the fuel tank. This was realized by having the mouth face the deep bottom.

  A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 6A and 6B. First, the structure of the fuel tank structure of the road paving machine according to the present embodiment will be described with reference to FIGS. 1 to 5 (a) and (b). 1 and 2, left and right front wheels 3 a and 3 b serving as traveling wheels are provided on the front side of the lower part of the machine body 2 in the road paving machine 1, and the left and right rear wheels serving as driving wheels are provided on the rear side. Wheels 4 are provided.

  On the front side of the upper part of the machine body 2, a composite hopper 5 that receives asphalt composite from a dump truck (not shown) is provided. The asphalt composite material received by the composite material hopper 5 is placed in the rear part of the machine main body 2 by a chain conveyor 6 having a two-row type 6a and 6b structure having inter-space portions d as shown in FIG. The transported asphalt mixture is spread and spread by the screed 8 while being spread in the width direction of the machine body 2 by a screw (not shown) on the roadbed on which the asphalt emulsion is sprayed by the emulsion spraying mechanism 7. Has been. The screed 8 is supported by a leveling arm 9 and is extendable in the width direction of the machine body 2.

Further, a power unit 10 equipped with an engine or the like (not shown) serving as a power source for the road pavement machine 1 is installed on the upper side of the central portion of the machine body 2. In this embodiment, a fuel tank for supplying fuel to the engine is configured as follows. That is, as shown in FIG. 3, a gap between the transport stroke side 6 _CARY and the return stroke side 6 _RTRN that has not been used in the chain conveyor 6 is effectively used, and a sub fuel tank 12 is mounted in the gap. Thus, a required tank capacity is secured by the sub fuel tank 12 and the main fuel tank 11.

The sub fuel tank 12 is mounted in the gap between the transport stroke side 6 _CARY and the return stroke side 6 _{RTRN in the} chain conveyor 6, so that the shape thereof is formed thin. It is mounted tilted forward at an angle. The sub fuel tank 12 is mounted in such a shape and manner, and at the bottom thereof, a portion corresponding to the inter-strip portion d in the chain conveyor 6 having the two-row type 6a and 6b structure is protruded downward and deep. A bottom 12a is formed. As shown in FIG. 5 (b), the suction pipe 13 for sucking up the fuel in the sub fuel tank 12 is provided at substantially the center of the sub fuel tank 12 in a plan view, and its suction port 13a Even when the remaining fuel reaches the deep bottom portion 12a, the remaining fuel can be reliably sucked up from the suction pipe 13.

  The main fuel tank 11 and the thinly formed sub fuel tank 12 are mounted in the machine main body 2 with the main fuel tank 11 positioned on the upper side and the sub fuel tank 12 positioned on the lower side, and a communication pipe. The two fuel tanks 12 and 13 function as one fuel tank.

Next, the operation of the fuel tank structure of the road paving machine configured as described above will be described with reference to FIGS. 5A and 5B and FIGS. As a dead space in the machine body 2, the gap between the transport stroke side 6 _CARY and the return stroke side 6 _RTRN in the chain conveyor 6 that has not been used so far is effectively used, and a sub fuel tank 12 is mounted in this gap. This ensures the required tank capacity.

Since the sub fuel tank 12 is mounted in the gap between the transport stroke side 6 _CARY and the return stroke side 6 _{RTRN in the} chain conveyor 6, the shape of the sub fuel tank 12 becomes thin, and a slight amount corresponding to the stretched state of the chain conveyor 6 is obtained. It is mounted tilted forward at an angle. The main fuel tank 11 and the thinly formed sub fuel tank 12 are mounted in the machine main body 2 with the main fuel tank 11 positioned on the upper side and the sub fuel tank 12 positioned on the lower side, and a communication pipe. The two fuel tanks 12 and 13 function as one fuel tank. Then, after the construction is finished, the remaining fuel when the road paving machine 1 is loaded on the trailer using the inclined plate is accommodated in the sub fuel tank 12 located on the lower side.

  Since the sub fuel tank 12 is formed in a thin shape, the inclined plate after the construction of the road pavement machine 1 on the flat ground (the state of (a) and (b) of FIG. 5) and the slope construction or after the construction is finished. Substituting by the suction pipe 13 with the change in the inclination angle of the machine body 2 in the state (e.g., the inclination state of about 10 [deg.] In the state of FIGS. 6A and 6B) during loading on the used trailer The fuel suction state in the fuel tank 12 is likely to change greatly.

  On the other hand, in the sub fuel tank 12, a bottom portion that does not interfere with the chain conveyor 6 protrudes downward to form a deep bottom portion 12a, and the suction port 13a of the suction pipe 13 faces the deep bottom portion 12a. As a result, when the road paving machine 1 is loaded on the trailer using the inclined plate after the completion of the construction, as shown in FIG. In combination with this, even if the remaining fuel is reduced, the remaining fuel is accumulated in the deep bottom portion 12a of the sub fuel tank 12 and can be reliably sucked up from the suction pipe 13 so that the engine can be operated. .

As described above, in the fuel tank structure of the road paving machine according to the present embodiment,
The gap between the transport stroke side 6 _CARY and the return stroke side 6 _RTRN in the chain conveyor 6 that has not been used until now is effectively used, and the required tank capacity is secured by installing the sub fuel tank 12 in this gap. can do.

  The sub fuel tank 12 has a bottom portion 12a formed by projecting a bottom portion that does not interfere with the chain conveyor 6 downward, and the suction port 13a of the suction pipe 13 faces the deep bottom portion 12a. Even when the road pavement machine 1 is loaded on a trailer using an inclined plate, the remaining fuel is collected in the deep bottom portion 12a of the sub fuel tank 12 even when the remaining fuel is reduced. Suction can be performed and the engine can be operated.

  When the road paving machine 1 is loaded on the trailer using the inclined plate after the completion of the construction, the sub fuel tank 12 is corrected in the forward leaning posture, so that the remaining fuel is reduced even if the remaining fuel is reduced. Can be sucked up from the suction pipe 13 more reliably.

  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 gap between the transport stroke side and the return stroke side of the chain conveyor is effectively used, and a fuel tank is installed in the gap to secure the tank capacity, and at the time of construction and loading on the trailer after completion of construction, etc. Asphalt with and without an emulsion spraying function that makes it possible to reliably suck up the fuel in the tank from the suction pipe even when the state of the fuel in the tank changes significantly with the change in the inclination angle It can be widely applied to spreader machines including finishers. Further, the tank is not limited to the fuel tank, and can be applied to an inclined tank such as an emulsion tank, a decomposing agent tank, a cleaning liquid tank, a chemical tank, a water tank, and a hydraulic oil tank.

_{DESCRIPTION OF SYMBOLS} 1 Road pavement machine 2 Machine main body 3a, 3b Front wheel 4 Rear wheel 5 Composite hopper 6 Chain conveyor 6 _CARY conveyance process side 6 _RTRN return process side 7 Emulsion spreading mechanism 8 Screed 9 Leveling arm 10 Power unit 11 Main fuel tank 12 Sub Fuel tank 12a Deep bottom 13 Suction pipe 14 Communication pipe

Claims (2)

A screed while spreading the asphalt mixture transported to the rear part of the machine body with a screw conveyor, which is received by a composite hopper at the front part of the machine body and has a space part with an appropriate interval between the two parts. A fuel tank structure for road paving machines spread on the roadbed,
A fuel tank is installed in the gap between the transport stroke side and the return stroke side of the chain conveyor to secure the tank capacity, and the fuel tank has a bottom portion corresponding to the gap portion in the chain conveyor having the two-row structure. A fuel tank structure for a road pavement machine, characterized in that a deep bottom portion is formed so that a suction port of a suction pipe for sucking up fuel in the fuel tank faces the deep bottom portion.   2. The fuel tank structure for a road pavement machine according to claim 1, wherein the fuel tank is inclined forward at an angle corresponding to an extending mode of the chain conveyor.

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