Asphalt mixture laying machine

Abstract

To provide a mixture laying machine with a reduced risk of air fan failure.SOLUTION: A mixture laying machine 100 comprises: a traveling body 1; a hopper 2 loaded on the traveling body and for storing the mixture; a cab seat 11 loaded on the traveling body; a movable roof 20 arranged above the cab seat; an air fan 63 for blowing gas; a flexible flow passage member 64 forming a flow passage that is communicated with the air fan and allows gas flow; a discharge port 66 communicated with the flow passage and discharging the gas; a support part 80 fitted to a roof and supporting the discharge port to be able to change its orientation; and a cover 70 for covering the discharge port when the discharge port is at a first height position H1. When the discharge port is at a second height position H2 above the cab seat and higher than the first height position H1, the discharge port is directed to the side opposite to the cab seat.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a composite material laying machine.

Background Art

[0002] There is known a paving machine having a blower and a chimney that diverge upward the gas emitted from asphalt (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a state where gas is not discharged, foreign matter may enter from the gas discharge port and reach the blower. When the blower is operated with foreign matter present inside, there is a risk that the blower may malfunction due to the foreign matter.

[0005] An object of the present disclosure is to provide a composite material laying machine capable of reducing the risk of malfunction in the blower.

Means for Solving the Problems

[0006] The composite material laying machine according to one aspect of the present disclosure includes a traveling body, The aforementioned a hopper mounted on the traveling body and capable of accommodating a composite material, The aforementioned a driver's seat mounted on the traveling body, The aforementioned a movable roof disposed above the driver's seat, a blower for blowing gas, The aforementioned communicating with the blower The aforementioned a channel member having flexibility that forms a flow path through which gas flows, The aforementioned communicating with the flow path The aforementioned an exhaust port for discharging gas, The aforementioned attached to the roof, The aforementioned A support part that supports the direction of the discharge port so that it can be discharged, The aforementioned When the discharge port is located at the first height position, Upward It includes a cover that covers the outlet, The aforementioned It is above the driver's seat. The aforementioned At a second height position higher than the first height position, The aforementioned If an outlet exists, The aforementioned The exhaust outlet is directed away from the driver's seat. [Effects of the Invention]

[0007] This disclosure provides a concrete mix laying machine that can reduce the risk of malfunctions occurring in the blower. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view of an asphalt finisher according to an embodiment. [Figure 2] This is a side view of an asphalt finisher according to an embodiment. [Figure 3] This is a rear view showing the gas exhaust system. [Figure 4] This is a rear view showing the end of the duct, the outlet, and the cover. [Figure 5] This is a side view showing the end of the duct, the outlet, and the cover. [Figure 6] This is a side view showing the end of the duct, the outlet, and the cover, with the upward-facing outlet covered by the cover. [Modes for carrying out the invention]

[0009] Figures 1 and 2 are side views of an asphalt finisher 100 according to an embodiment. The asphalt finisher 100 is an example of an asphalt mixture laying machine. The asphalt mixture laying machine may be a base paver, tack paver, or multi-asphalt paver, etc. The asphalt finisher 100 mainly comprises a tractor 1, a hopper 2, and a screed 3. Hereinafter, the direction of the hopper 2 as seen from the tractor 1 (+X direction) will be considered the front, and the direction of the screed 3 as seen from the tractor 1 (-X direction) will be considered the rear. The tractor 1 is an example of a vehicle. In this specification, "front" and "rear" correspond to the front and rear of the vehicle.

[0010] Tractor 1 is a mechanism for driving the asphalt finisher 100. In this embodiment, tractor 1 moves the asphalt finisher 100 by rotating the rear wheels 5 using a rear-wheel hydraulic motor and rotating the front wheels 6 using a front-wheel hydraulic motor. The rear-wheel hydraulic motor and the front-wheel hydraulic motor rotate by receiving hydraulic fluid from a hydraulic pump. The rear wheels 5 and front wheels 6 may be replaced with crawlers.

[0011] The asphalt paver 100 is equipped with a controller 50. The controller 50 is a control device that controls the asphalt paver 100. In this embodiment, the controller 50 is composed of a microcomputer including a CPU, memory, non-volatile storage device, etc., and is mounted on the tractor 1. The various functions of the controller 50 are realized by the CPU executing a program stored in the non-volatile storage medium.

[0012] The hopper 2 is a mechanism for receiving paving material. The hopper 2 includes a container capable of holding paving material. The hopper 2 is installed on the front side of the tractor 1 and is configured to be openable and closable in the Y-axis direction (vehicle width direction) by a hopper cylinder. The asphalt finisher 100 typically receives paving material (e.g., asphalt mixture) from the bed of a dump truck with the hopper 2 fully open. Asphalt is an example of a mixture.

[0013] Figures 1 and 2 show that the hopper 2 is in the fully open state. When the paving material in the hopper 2 decreases, the hopper 2 is closed, and the paving material near the inner wall of the hopper 2 is collected at the central part of the hopper 2. This is to enable the conveyor at the central part of the hopper 2 to feed the paving material to the rear side of the tractor 1. The paving material fed to the rear side of the tractor 1 is spread in the vehicle width direction by the screw SC behind the tractor 1 and in front of the screed 3. In this embodiment, the screw SC is in a state where the extension screws are connected left and right. Figures 1 and 2 show the paving material PV spread on the roadbed RB by the screw SC in a coarse dot pattern. Also, Figures 1 and 2 show the newly constructed pavement NP formed by compacting the paving material PV by the screed 3 in a fine dot pattern.

[0014] The screed 3 is a mechanism for leveling the paving material PV. The screed 3 may include a front screed and a rear screed. The screed 3 is a floating screed pulled by the tractor 1 and is connected to the tractor 1 via a leveling arm 3A.

[0015] On the upper part of the tractor 1, a guide rail 1G that can be used as a handrail by the operator of the asphalt finisher 100 is installed.

[0016] On the upper part of the rear side of the tractor 1, an operator station 10 is provided. The operator station 10 is a section on the tractor 1 used when the operator operates the asphalt finisher 100 and has a driver's seat 11 and a steering wheel 12. The steering wheel 12 is arranged in front of the driver's seat 11.

[0017] A movable roof 20 is provided above the driver's seat 11 and steering wheel 12. The roof 20 is a component that protects the operator from rain or sunlight, and is also called a canopy. The roof 20 can be raised and lowered; Figure 1 shows the roof 20 in the raised position, and Figure 2 shows the roof 20 in the lowered position. The roof 20 is supported by a number of support columns 21 and 22. The support columns 21 and 22 are spaced apart in the front-rear direction of the tractor 1. The support columns 21 are located in front of the operator station 10, and the support columns 22 are located behind the operator station 10. A pair of support columns 21 are spaced apart in the vehicle width direction. Similarly, a pair of support columns 22 are spaced apart in the vehicle width direction. The roof 20 is supported by a total of four support columns 21 and 22.

[0018] The support column 21 has a first portion 21a and a second portion 21b. The first portion 21a is fixed to the tractor 1 and extends upward. The lower end of the second portion 21b is connected to the upper end of the first portion 21a. The second portion 21b is pivotable relative to the first portion 21a. The roof 20 is connected to the upper end of the second portion 21b. The second portion 21b may be connected to, for example, a hydraulic cylinder for raising the support column 21.

[0019] Similarly, the support column 22 has a first portion 22a and a second portion 22b. The first portion 22a is fixed to the tractor 1 and extends upward. The first portion 22a extends diagonally backward. The upper end of the first portion 22a is positioned behind the lower end. The lower end of the second portion 22b is connected to the upper end of the first portion 22a. The second portion 22b is pivotable relative to the first portion 22a. The roof 20 is connected to the upper end of the second portion 22b. For example, a hydraulic cylinder for raising the support column 22 may be connected to the second portion 22b. Note that one of the hydraulic cylinders for raising the support column 21 and the hydraulic cylinder for raising the support column 22 may be omitted.

[0020] In the asphalt paver 100, the operator can raise and lower the roof 20 by swinging the second parts 21b and 22b of the support columns 21 and 22 by driving a hydraulic cylinder. When the operation to lower the roof 20 is performed, the asphalt paver 100 changes from a state in which the roof 20 is raised, as shown in Figure 1, to a state in which the roof 20 is lowered, as shown in Figure 2. Similarly, when the operation to raise the roof 20 is performed, the asphalt paver 100 changes from a state in which the roof 20 is lowered, as shown in Figure 2, to a state in which the roof 20 is raised, as shown in Figure 1.

[0021] Next, the gas discharge system 60 will be described with reference to Figures 3 to 6. Figure 3 is a rear view showing the gas discharge system 60. Figure 4 is a rear view showing the end of the duct, the outlet, and the cover. Figure 5 is a side view showing the end of the duct, the outlet, and the cover. Figure 6 is a side view showing the end of the duct, the outlet, and the cover, showing the upward-facing outlet covered by the cover.

[0022] As shown in Figure 3, the asphalt finisher 100 is equipped with a gas discharge system 60. The gas discharge system 60 discharges gases released from the asphalt mixture, which is supplied to the rear of the tractor 1 by a conveyor and dropped onto the roadbed RB, to a position higher than the driver's cab 11. The asphalt mixture is a petroleum distillation product and generates hydrocarbon gases when heated. The gases generated from the asphalt include, for example, nitrogen, sulfur, benzene, and hydrocarbons. The gas discharge system 60 discharges the gases generated from the asphalt mixture to the side opposite the driver's cab 11. In the illustrated example, the gas discharge system 60 discharges the gases generated from the asphalt mixture to the rear.

[0023] The gas exhaust system 60 comprises a hood 61, a hose 62, a fan 63, a hose 64, an exhaust duct 65, and a cover 70. The asphalt finisher 100 comprises multiple gas exhaust systems 60. The multiple gas exhaust systems 60 are spaced apart in the vehicle width direction. The asphalt finisher 100 may also comprise only one gas exhaust system 60.

[0024] The hood 61 is an example of a component for taking in gas rising from the asphalt mixture spread in the vehicle width direction by the screw SC, and is positioned above the screw SC. The intake port of the hood 61 is directed downward. Specifically, the hose 62 is an example of a component for guiding the gas taken in by the hood 61 to the fan 63, and connects the hood 61 and the fan 63. The hose 62 is an example of a flexible flow path component. The hood 61 may be connected to, for example, a hydraulic cylinder for moving the hood 61 up and down. The hood 61 is driven by the hydraulic cylinder and is displaceable in the vertical direction. The hose 62 is deformable according to the position of the hood 61. The hose 62 may expand and contract in the longitudinal direction.

[0025] Fan 63 is an example of a blower that blows gas. Specifically, fan 63 is configured to draw in gas taken in by the hood 61 and blow it out toward the outlet 66 of the exhaust duct 65. A hose 62 is connected upstream of fan 63, and a hose 64 is connected downstream of fan 63. Fan 63 is positioned above the hood 61. As shown in Figures 1 and 2, fan 63 is positioned behind the driver's seat 11. Fan 63 is fixed to the rear part of the tractor 1.

[0026] As shown in Figure 3, the hose 64 is an example of a component that guides the gas blown out by the fan 63 to the exhaust duct 65, connecting the fan 63 and the exhaust duct 65. Specifically, the hose 64 is an example of a flexible flow path component. The flow path component communicates with the blower and forms a flow path through which the gas flows. The hose 64 is deformable according to the height of the exhaust duct 65. The hose 64 bends or expands appropriately according to the distance between the fan 63 and the exhaust duct 65.

[0027] The exhaust duct 65 is an example of a component that guides the gas that has passed through the hose 64 to the outlet 66. Specifically, the exhaust duct 65 is an example of a non-flexible flow path component and may be a short pipe. In the illustrated example, the exhaust duct 65 is formed from a metal pipe. As shown in Figures 3 and 4, the exhaust duct 65 has an outlet 66. The gas that has flowed inside the hose 64 flows inside the exhaust duct 65 and is discharged from the outlet 66. When the gas discharge system 60 is in operation, the outlet 66 is directed away from the driver's seat 11. In the illustrated example, the outlet 66 is located behind the driver's seat 11 and directed towards the rear.

[0028] As shown in Figures 1 to 6, the cover 70 is an example of a component that covers the exhaust duct 65 and is positioned above the exhaust duct 65. In the illustrated example, the cover 70 comprises a top plate 71, a pair of side plates 72, and a back plate 73. The top plate 71 is an example of a component that can cover the upper surface of the exhaust duct 65 when the roof 20 is raised and is positioned above the exhaust duct 65. When the roof 20 is lowered, the top plate 71 can cover the outlet 66 of the exhaust duct 65. The top plate 71 is inclined with respect to the X-axis direction, as shown in Figure 5. The rear end 71b of the top plate 71 is positioned above the front end 71a of the top plate 71.

[0029] The pair of side plates 72 are examples of components for covering at least a portion of the left and right sides of the exhaust duct 65, and are positioned on both sides of the exhaust duct 65 in the vehicle width direction, as shown in Figure 4. The thickness direction of the side plates 72 is aligned with the vehicle width direction. The side plates 72 extend downward from the top plate 71. The rear plate 73 is an example of a component that can cover the rear of the exhaust duct 65 when the roof 20 is raised. In the state shown in Figure 4, the rear of the exhaust duct 65 refers to the surface opposite (front) the outlet 66. In the state shown in Figure 4, the front of the exhaust duct 65 refers to the surface on the side (rear) to which the outlet 66 is directed. The rear plate 73 is positioned in front of the exhaust duct 65. With respect to the cover 70 and the exhaust duct 65, the side closer to the driver's seat 11 may be considered the rear side, and the side further from the driver's seat 11 may be considered the front side.

[0030] The cover 70 is attached to the rear portion of the roof 20. The cover 70 is fixed to the rear frame 20a of the roof 20. The cover 70 may be welded to the roof 20 or joined via supports such as mounting brackets. The cover 70 moves as a unit with the roof 20.

[0031] Next, a support portion 80 that pivots (rotates) the exhaust duct 65 relative to the cover 70 will be described. As shown in Figures 3 to 6, the gas discharge system 60 includes a support portion 80 that rotatably supports the exhaust duct 65. The support portion 80 rotatably supports the exhaust duct 65 relative to the cover 70. The support portion 80 supports the exhaust duct 65 so that the orientation of the outlet 66 can be changed. The support portion 80 may directly support the exhaust duct 65, or it may support the exhaust duct 65 via other members connected to the exhaust duct 65. The support portion 80 may, for example, support the upper end of the hose 64, thereby supporting the exhaust duct 65 connected to the upper end of the hose 64. The orientation of the outlet 66 is changed as the posture of the exhaust duct 65 supported by the support portion 80 changes. In Figures 3 to 5, which show the state when the roof 20 is raised, the outlet 66 is facing rearward. In Figure 6, which shows the state when the roof 20 is lowered, the discharge port 66 is facing upwards.

[0032] As shown in Figure 4, the support portion 80 has a rotating shaft 81 and supports 82 and 83. The rotating shaft 81 is the rotating shaft of the exhaust duct 65, which is rotatable relative to the cover 70, and extends in the Y-axis direction. Both ends of the rotating shaft 81 are rotatably supported by a pair of side plates 72. Through holes are formed in the side plates 72. The rotating shaft 81 is inserted through the through holes in the side plates 72. The rotating shaft 81 is inserted, for example, by a flanged sleeve, and the sleeve is held in place by the side plates 72. In the illustrated example, the flanged sleeve functions as a retaining member to prevent the rotating shaft 81 from falling out of the pair of side plates 72. The rotating shaft 81 may also be supported non-rotatably relative to the pair of side plates 72.

[0033] Support 82 is an example of a member fixed to the side of the exhaust duct 65, and extends along the central axis L64 of the hose 64, as shown in Figures 4 and 5. Support 82 may be, for example, a plate having a predetermined width and length. Support 82 is positioned on both sides of the exhaust duct 65 in the Y-axis direction, as shown in Figure 4. The outlet 66 is positioned between the pair of supports 82. As shown in Figure 5, the lower end of the support 82 is joined to the exhaust duct 65, and the upper end of the support 82 extends above the exhaust duct 65.

[0034] As shown in Figure 4, support 83 extends in the Y-axis direction and connects the upper ends of the pair of supports 82. Supports 82 and 83 can be formed by bending a strip of sheet metal into a U-shape. Support 83 connects the pair of supports 82 outside the exhaust duct 65.

[0035] Furthermore, the pair of supports 82 have through holes through which the rotating shaft 81 is inserted. The rotating shaft 81 passes through the pair of supports 82 and the side plate 72. The supports 82 and 83 rotate around the rotating shaft 81. In other words, the exhaust duct 65 and the outlet 66 rotate around the rotating shaft 81. In Figure 6, which shows the state when the roof 20 is lowered, the supports 82 extend in the X-axis direction, and the outlet 66 is facing upward. When the outlet 66 is facing upward, the outlet 66 is covered from above by the top plate 71.

[0036] Next, the orientation of the hose 64 and the direction of the outlet 66 will be described. The orientation of the hose 64 and the direction of the outlet 66 change depending on the height of the roof 20 (exhaust duct 65). The orientation of the exhaust duct 65 shown in Figures 4 and 5 corresponds to the orientation of the exhaust duct 65 when the roof 20 is raised, as shown in Figure 1. The orientation of the exhaust duct 65 shown in Figure 6 corresponds to the orientation of the exhaust duct 65 when the roof 20 is lowered, as shown in Figure 2.

[0037] The position of the exhaust duct 65 shown in Figure 2 is designated as the first height position H1, and the position of the exhaust duct 65 shown in Figure 1 is designated as the second height position H2. The second height position H2 is higher than the first height position H1. The reference position for the heights of the first height position H1 and the second height position H2 may be the position of the road surface, a specific position on the tractor 1, or the position of the fan 63. The heights of the first height position H1 and the second height position H2 may also be the distance between the position of the fan 63 and the position of the exhaust port 66 of the exhaust duct 65 in the Z-axis direction.

[0038] As shown in Figure 1, when the exhaust duct 65 is located at the second height position H2, the hose 64 is positioned to extend upward from the fan 63. The lower portion of the hose 64 is positioned along the first portion 22a of the support column 22. The upper portion of the hose 64 extends above the first portion 22a.

[0039] When the exhaust duct 65 is located at the second height position H2, the outlet 66 is directed towards the rear of the tractor 1, as shown in Figures 4 and 5. In this state, the gas discharge system discharges gas. The direction in which the central axis L65 of the exhaust duct 65 extends is inclined with respect to the direction in which the central axis L64 of the hose 64 extends. The gas flowing through the exhaust duct 65 flows diagonally upward. The gas discharged from the outlet 66 is discharged diagonally upward.

[0040] In the asphalt finisher 100, when laying the asphalt mixture, the roof 20 can be raised, as shown in Figure 1, to direct the discharge port 66 towards the rear of the tractor 1. At this time, the discharge port 66 is positioned at a second height position H2, which is above the driver's seat 11.

[0041] In the gas discharge system 60, in this state, the fan 63 is rotated to draw in the gas generated from the asphalt mixture through the hood 61. The gas drawn in from the hood 61 flows through the hose 62, fan 63, hose 64, and exhaust duct 65 and is discharged from the outlet 66. The gas generated from the asphalt mixture is discharged to the rear at the second height position H2. The gas discharge system can discharge the gas generated from the asphalt mixture above the driver's seat 11 and on the opposite side from the driver's seat 11.

[0042] In the asphalt finisher 100, when the machine is not operating and not laying asphalt, the roof 20 can be lowered as shown in Figure 2. By lowering the roof 20, the cover 70 moves closer to the fan 63 and forward. In conjunction with this movement, the hose 64 deforms to curve, so that the portion of the hose 64 closest to the exhaust duct 65 is positioned along the X-axis. Since the exhaust duct 65 is rotatably supported relative to the cover 70, it changes to the position shown in Figure 6. At this time, the discharge port 66 is positioned at the first height position H1 shown in Figure 2.

[0043] In the gas exhaust system 60, with the roof 20 lowered, the exhaust port 66 is covered by the top plate 71, as shown in Figure 6. By covering the upward-facing exhaust port 66 with the top plate 71, the entry of foreign matter into the flow path in the hose 64 is suppressed. This suppresses the entry of foreign matter into the fan 63. Therefore, the occurrence of malfunctions in the fan 63 when it is in operation is suppressed. As a result, the reliability of the gas exhaust system 60 can be improved.

[0044] [Conventional technology] Next, I will explain the problems with conventional technology. Conventional asphalt finishers include fixed-type models where the exhaust port is fixed to the roof and its position does not change. In the case of fixed-type models, since the position of the exhaust duct does not change, a problem arises in that the length of the hose must be increased in order to follow the movement of the roof. A problem arises in that the pressure loss of the gas flowing through the flow path increases when the hose is long. As a result, the efficiency of the gas discharge system is reduced.

[0045] Conventional asphalt finishers include a rotating type in which the discharge port is rotatably supported relative to the roof. In the case of the rotating type, when the gas discharge system is stopped, the discharge port is positioned facing upwards, which could allow foreign objects to enter the hose from the discharge port and potentially reach the flow path inside the blower. When the high-speed rotating blower is operated, there was a risk that the foreign objects could damage the blades.

[0046] Conventional asphalt finishers include types that attach and detach exhaust ducts in conjunction with the raising and lowering of the roof. This type of attachment and detachment presents a challenge: it increases the workload for the operator.

[0047] [Effects and benefits of Asphalt Finisher 100] In the asphalt finisher 100 according to this embodiment, when the discharge port 66 is located at a second height position H2, which is above the driver's seat 11 and higher than the first height position H1, the discharge port 66 is directed away from the driver's seat 11. This allows the asphalt finisher 100 to discharge gas above the driver's seat 11 and away from the driver's seat 11, thereby preventing the gas generated from the asphalt mixture from hitting the operator. In other words, the asphalt finisher 100 can suppress the effects of gas on the operator.

[0048] In the asphalt finisher 100, the direction of the discharge port 66 can be changed according to the height of the roof 20. By changing the direction of the discharge port 66, it is not necessary to excessively deform the hose 64, so the length of the hose 64 can be shortened. As a result, the asphalt finisher 100 can suppress pressure loss of the gas flowing through the hose 64 and suppress the decrease in efficiency of the gas discharge system 60. In addition, the asphalt finisher 100 is equipped with a cover 70 to prevent foreign matter from entering the hose 64 from the discharge port 66. Therefore, damage to the fan 63 can be suppressed.

[0049] In the asphalt finisher 100, the cover 70 has a top plate 71 that covers the discharge port 66 from above, and a pair of side plates 72 that are positioned on both sides of the discharge port 66 in the vehicle width direction of the tractor 1. With this configuration of the asphalt finisher 100, when the roof 20 is lowered, the upward-facing discharge port 66 is covered by the top plate 71, thereby preventing foreign matter from entering the inside of the hose 64 from the discharge port 66. The asphalt finisher 100 can prevent foreign matter from entering the fan 63, thereby preventing malfunctions in the fan 63.

[0050] In the asphalt finisher 100, when the discharge port 66 is located at the second height position H2, the top plate 71 extends further back than the discharge port 66. With this configuration of the asphalt finisher 100, the top plate 71 can straighten the airflow so that the external airflow does not obstruct the discharge of gas.

[0051] In the asphalt finisher 100, as shown in Figure 5, when viewed in the width direction (Y-axis direction) of the tractor 1, the top plate 71 is inclined with respect to the horizontal direction (X-axis direction), and the rear end 71b of the top plate 71 is positioned higher than the front end 71a of the top plate 71. In the asphalt finisher 100 with this configuration, the gas discharged from the discharge port 66 flows easily along the top plate 71, improving the gas discharge efficiency in the gas discharge system 60.

[0052] In the asphalt finisher 100, the support section 80 includes a rotating shaft 81 extending in the width direction of the tractor 1, and a support 82 extending in the radial direction (Z-axis direction) of the rotating shaft 81 and connecting the rotating shaft 81 and the exhaust duct 65. With this configuration of the asphalt finisher 100, the direction of the discharge port 66 can be easily changed by rotating the support 82 and the exhaust duct 65 around the rotating shaft 81. In other words, the direction of the discharge port 66 can be changed by changing the posture of the exhaust duct 65 to follow the movement of the roof 20. Therefore, in the asphalt finisher 100, the routing of the hose 64 is easy, eliminating the need for a longer hose 64 and reducing pressure loss.

[0053] In the asphalt finisher 100, the roof 20 is movable up and down. When the roof 20 is lowered, the discharge port 66 is at a first height position H1 and faces upward. When the roof 20 is raised, the discharge port 66 is at a second height position H2 and faces away from the driver's seat 11. With this configuration, the asphalt finisher 100 can discharge gas away from the driver's seat 11 at the second height position H2 during operation. In the asphalt finisher 100, the roof 20 can be lowered and stored, and in this state, the discharge port 66 can be positioned at the first height H1 and face upward. When the roof 20 is stored, the discharge port 66 is covered by the cover 70, so the cover 70 can prevent foreign matter from entering the inside of the hose 64. Furthermore, when the roof 20 is raised and upright, the discharge port 66 can be positioned at a second height, and the direction of the discharge port 66 can be directed away from the driver's seat 11.

[0054] In the asphalt finisher 100, when the discharge port 66 is at the second height position H2, the discharge port 66 is positioned behind (diagonally upward and backward) the driver's seat 11 and directed backward. With this configuration of the asphalt finisher 100, when the gas discharge system 60 is in operation, the roof 20 is raised to position the discharge port 66 at the second height position H2, and with the discharge port 66 positioned behind (diagonally upward and backward) the driver's seat 11, the gas can be discharged to the rear of the tractor 1, reducing the risk of gas flowing into the driver's seat 11. Therefore, the impact of gas on the operator is further suppressed.

[0055] Preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications, substitutions, etc., can be applied to the embodiments described above without departing from the scope of the present invention. Furthermore, features described separately can be combined as long as no technical inconsistencies arise.

[0056] In the above embodiment, the case in which the cover 70 and exhaust duct 65 are installed at the rear end of the roof 20 is illustrated, but the cover 70 and exhaust duct 65 may be positioned on the outside in the Y-axis direction of the roof 20, or at other positions. Also, the exhaust port 66 may be directed toward the rear of the vehicle 1, for example, toward the opposite side from the driver's seat 11 in the Y-axis direction. [Explanation of Symbols]

[0057] 100...Asphalt finisher (aerosol laying machine), 1...Tractor (vehicle), 2...Hopper, 11...Driver's cab, 20...Roof, 63...Fan (blower), 64...Hose (flow channel component), 66...Discharge port, 70...Cover, 71...Top plate, 72...Side plate, 80...Support section, 81...Rotating shaft, 82...Support, SC...Screw, H1...First height position, H2...Second height position, X...X-axis direction, Y...Y-axis direction (width direction), Z...Z-axis direction

Claims

1. The vehicle and A hopper mounted on the aforementioned traveling body and capable of containing asphalt, The driver's seat mounted on the aforementioned vehicle, A movable roof positioned above the driver's seat, A blower that blows gas, A flexible flow channel member is provided, which is connected to the blower and forms a flow channel through which the gas flows. An outlet that communicates with the aforementioned flow path and discharges the gas, A support part attached to the roof and supporting the direction of the discharge port so that it can be changed, When the discharge port is located at a first height position, the system includes a cover that covers the upward-facing discharge port, Asphalt mix laying machine, wherein, when the discharge port is located at a second height position that is above the driver's seat and higher than the first height position, the discharge port is directed away from the driver's seat.

2. The cover fixed to the roof is A top plate that covers the upward-facing discharge port from above, The asphalt mixture laying machine according to claim 1, further comprising a pair of side plates arranged on both sides of the discharge port in the width direction of the traveling body.

3. The asphalt mixture laying machine according to claim 2, wherein, when the discharge port is located at the second height position, the top plate extends further back than the discharge port.

4. When viewed in the width direction of the aforementioned traveling body, the top plate is inclined with respect to the horizontal direction. The asphalt mixture laying machine according to claim 2, wherein the rear end of the top plate is positioned higher than the front end of the top plate.

5. The aforementioned support portion is A rotating shaft extending in the width direction of the aforementioned traveling body, The asphalt mixture laying machine according to claim 1, further comprising a support extending radially in the direction of the rotating shaft and connecting the rotating shaft and the flow channel member.

6. The aforementioned roof is movable up and down. The aforementioned outlet changes direction in conjunction with the raising and lowering of the roof. When the roof is lowered, the discharge port is located at the first height position and faces upward. The asphalt mixture laying machine according to claim 1, wherein, when the roof is raised, the discharge port is located at the second height position and is directed away from the driver's seat.

7. The asphalt mixture laying machine according to claim 1, wherein, when the discharge port is located at the second height position, the discharge port is positioned behind the driver's seat and directed towards the rear.

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