JP2001020214A - Asphalt laying and leveling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying and leveling machine capable of leveling an asphalt mixture into constant thickness in inexpensive and compact constitution by providing an opening and closing plate sliding in the horizontal direction in an outlet opened in the bottom face of a hopper. SOLUTION: An asphalt laying and leveling machine discharges an asphalt mixture stored in a hopper 3 on a pavement surface to be laid and leveled, and an outlet 30 is opened in the bottom face of the hopper 3. An opening and closing plate 27 capable of opening and closing the outlet 30 is provided by sliding the outlet 30 to the horizontal direction. The opening and closing plate 27 is connected to a cylinder 28 or the like, and a discharge amount of the asphalt mixture is adjusted by adjusting a sliding amount of the opening and closing plate 27. Thus, the asphalt mixture can be leveled into constant thickness by the compact and inexpensive asphalt laying and leveling machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt pavement in which when asphalt pavement is carried out on a road surface, the asphalt mixture supplied to a hopper is discharged to a pavement surface and the asphalt mixture is spread by screed. The present invention relates to a spreader, and particularly to a small asphalt spreader capable of spreading an asphalt mixture in a narrow area such as a water pipe work.

[0002]

2. Description of the Related Art Conventionally, pavement machines such as asphalt finishers have been used when performing construction work such as road pavement and road repair. For example, asphalt mixture stored in a hopper of the asphalt finisher is used. After being conveyed to the rear of the fuselage by a conveyor and discharged to a pavement surface, the asphalt mixture was spread by a screed and compacted. In addition, when high-precision pavement with an asphalt finisher is not necessary, such as when temporarily rehabilitating a dug up road, there is no small and simple asphalt finisher for temporary recovery. The material was supplied, and the worker spread the floor manually by rake or the like.

[0003]

However, as described above,
When the asphalt mixture is spread by a worker's hand, the asphalt mixture supplied to the pavement surface has a high temperature and a high viscosity. In particular, in the summer work, the working environment is harsh due to the handling of high-temperature asphalt mix at high temperatures, and in the winter work, the spread of the asphalt mix is apt to drop quickly because the temperature of the asphalt mix tends to decrease. The work load had to be increased. In such a case,
In order to use an asphalt finisher, the asphalt finisher is large, and has a complicated structure and many failures. Therefore, in the present invention, in order to reduce such a work load, an asphalt spreader for spreading the asphalt mixture discharged on the pavement surface is provided compactly and inexpensively.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in claim 1, in an asphalt spreader that discharges and spreads the asphalt mixture stored in the hopper on a pavement surface, a discharge port is opened on a bottom surface of the hopper, and the discharge port is horizontally extended. An opening / closing plate was provided to allow the discharge port to be opened and closed by sliding, and the opening / closing plate was connected to an actuator.

According to a second aspect of the present invention, the lower end portions of the left and right side plates forming the side walls of the hopper are bent in the horizontal direction to form an upper guide portion, and a lower guide plate is disposed below the upper guide portion. The opening and closing plate was slidably interposed between the upper guide portion and the lower guide plate.

According to a third aspect of the present invention, there is provided an asphalt spreader for discharging and leveling an asphalt mixture stored in a hopper disposed at a front portion thereof on a pavement surface. An opening is provided at a lower portion, and an opening / closing plate is provided at the opening so as to be capable of opening and closing the opening by sliding the opening / closing portion upward and downward.

According to a fourth aspect of the present invention, there is provided an asphalt laying machine in which a wing portion capable of widening an input port above a hopper into which an asphalt mixture is input is foldable, wherein a folding position of the wing portion is provided. And a stopper is provided at the folded position by the weight of the wing portion.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side view showing an asphalt spreader of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, FIG. 4 is a rear view, and FIG. 5 is a first and second wing portions of a hopper. FIG. 6 is a front view showing a sliding structure of an opening / closing plate for opening and closing a discharge port of the hopper, and FIG. 7 is a side sectional view showing a hopper configured to be able to open and close a lower portion of a back plate. FIG. 8 and FIG. 8 are side views showing a screed arranging portion at the rear part of the fuselage, and FIG. 9 is a side view showing a posture at the time of spreading the screed.

First, the configuration of the asphalt spreader of the present invention will be described. As shown in FIGS. 1 to 4, the vehicle body 1 is configured to be able to travel with crawler-type traveling devices 2 on the left and right lower ends, and a hopper 3 for receiving asphalt mixture at a front portion of the vehicle body 1. It is arranged. A screed 5, which is a plate member for spreading and spreading asphalt mixture discharged from the hopper 3 to the pavement surface, is provided below the rear end of the vehicle body 1. The asphalt spreader includes, for example, a hopper 3 instead of the packing box in a packing box portion of a crawler-type transport vehicle in which packing boxes are arranged on one side in front of and behind the body. A screed 5 as a plate member for spreading and spreading the asphalt mixture can be attached to the three side ends.

An engine 6 for driving the crawler-type traveling device 2 is installed inside the vehicle body 1, and a driving force from the engine 6 is transmitted through a drive belt 9 to a hydraulic continuously variable transmission disposed behind the engine 6. It has been input to the device 7. The drive belt 9 is provided with a tension clutch 10 to turn on and off the input of the driving force to the hydraulic continuously variable transmission 7. The driving force after steplessly shifting by the hydraulic stepless transmission 7 is transmitted to the drive sprocket 11 of the crawler type traveling device 2 after being shifted by a transmission (not shown), whereby the crawler type traveling device 2 travels. Being driven.

A hydraulic oil tank 12 is disposed above the hydraulic continuously variable transmission 7, and various operation levers such as an accelerator lever 13, a brake lever 14, and a steering lever 15 are provided from the body 1. It is erected. An operation step 17 is provided at the rear end of the screed 5, and an operator stands on the operation step 17 to run and operate the asphalt spreader while riding. I have. Then, after charging the asphalt mixture into the hopper 3 of the asphalt spreader configured as described above,
While running the asphalt spreader, the hopper 3
The asphalt mixture is discharged to the pavement surface from a discharge port 30 opening at the bottom of the asphalt mixture, and the discharged asphalt mixture is spread by the screed 5. As described above, when the asphalt spread work is performed by the asphalt spreader, the worker performs minor work such as operating various operation levers while riding on the driving step 17. With only this, the asphalt spreader spreads the asphalt mixture while running on its own, so that the work load on the worker is light and the spread work can be performed quickly.

Next, the configuration of the hopper 3 will be described. The hopper 3 includes a lower hopper 21 and a wing portion,
The lower hopper 21 is provided with left and right side plates 21 b
21b, a back plate 21c erected at the rear end, and a bottom plate 21 inclined downward from the front end to the rear.
a of the lower hopper 21
Is disposed between the left and right crawler traveling devices 2. A range from the rear end of the bottom plate 21a to the back plate 21c in the lower part of the lower hopper 21 is opened to form a discharge port 30. The discharge port 30 is opened and closed by a switchable plate 27 configured to be slidable back and forth. It is configured to be possible. Lower hopper 21
A cylinder 28 is disposed below the front portion as an actuator. A front end of the cylinder 28 is attached to a bracket 29 fixed to the lower hopper 21, and a rear end of the piston rod of the cylinder 28 is an opening / closing plate 27. Attached to. The opening and closing plate 27 is opened and closed by driving the cylinder 28 to expand and contract. The opening and closing of the opening and closing plate 27 by the expansion and contraction driving of the cylinder 28 is performed by operating the opening and closing lever 16 provided at the rear of the body.

Above the lower hopper 21, the lower hopper 2
First wing portion 2 extending left and right outward from left and right ends of 1
A second wing part 23 is attached to the first wing part 22 so as to extend left and right outward from the left and right end of the first wing part 22. I have. At the front and rear ends above the lower hopper 21, horizontal frames 25 are arranged, and between the horizontal frames 25, support shafts 24 are extended in the front-rear direction. The first wing portion 22 is rotatably supported by the support shaft 24. The second wing portion 23 is rotatably supported by the support portions 22a of the first wing portion 22.

When the asphalt mixture is put into the hopper 3 from a dump truck or the like, the first wings 22 are pivoted outward to open.
The second wing portions 23 are pivoted outward to open, and the width of the input port of the hopper 3 into which the asphalt mixture is charged is widened so that the asphalt mixture falling from the dump truck or the like is not leaked. And a large amount of asphalt mixture can be stored in the hopper. The first wing section 22
The left-right width W1 of the hopper 3 when the second wing portion 23 and the second wing portions 23 are opened is equal to or larger than the left-right width of a dump truck or the like for charging asphalt mixture into the hopper 3. When the asphalt spreader moves or transports, the first wings 22 are pivoted inward and closed, and the second wings 23 are closed.
Is rotated inward and closed, so that the left and right width of the hopper 3 is reduced. Left and right width W2 of the hopper 3 when the first wings 22 and the second wings 23 are closed.
Is configured to be smaller than the left-right width W of the asphalt spreader so that the hopper 3 does not become an obstacle when the asphalt spreader is mounted on a vehicle that carries the spreader.

That is, the first wing section 22.2 of the hopper 3
2 and the second wing portions 23 are configured to be expandable and contractible, and the first wing portions 22
When the folds 3 and 23 are folded inward and closed, the left and right width of the hopper 3 is configured to be smaller than the left and right width W of the asphalt spreader. The second wing portion 23 can be folded so that the bottom surface of the second wing portion 23 is substantially perpendicular to the bottom surface of the first wing portion 22, and the left and right first wing portions 22 Is folded inward, the bottom surfaces of the first wing portions 22 have a substantially V shape in a front view. As described above, the hopper 3 is configured to have the first and second wing portions 22 and 23 that can be folded in two stages.

Stoppers 31 are attached to the left and right ends of the vertical plate 26 standing upright behind the hopper 3, and when the first wings 22 are folded inward, the stoppers 31 are used. The first wing portions 22 are supported to maintain the folded state. As shown in FIG. 5, the stopper 31 is slidably fitted in a stopper hole 26a formed in the vertical plate 26, and is supported by a spring 32 so that the support portion 31a projects forward of the vertical plate 26. Being energized. When folding the first wing portion 22 in the open state, the handle portion 31b is pulled backward so that the support portion 21a of the stopper 31 does not protrude forward than the vertical plate 26. When the first wing portion 22 is folded until is positioned inside the stopper 31, the handle portion 31 b is released and the support portion 21 a is projected forward from the vertical plate 26. Then, the first wing portion 22, which is going to open downward and outward by its own weight, is locked and supported by the support portion 31 a of the stopper 31.

As described above, the stopper 31 is provided, and the first wing portion 22 is supported by being locked to the stopper 31 by its own weight, so that the lock by the stopper 31 is released. The opening of the first wing portion 22 can be prevented, and the first wing portion 22 can be prevented from opening.
Can be stably stored in a folded state. Further, the stopper 31 is provided with the stopper hole 26 of the vertical plate 26.
Since it is a simple configuration that only fits into the a and is urged by the spring 32, it can be configured at low cost and can easily perform operations such as locking and releasing the folded state of the first wing portion 22.

As described above, the discharge port 30 of the hopper 3 closed by the opening and closing plate 27 can be opened and closed by moving the opening and closing plate 27 back and forth by the expansion and contraction driving of the cylinder 28. By adjusting the opening / closing degree of the opening / closing plate 27 to change the opening area of the discharge port 30, it is possible to adjust the discharge amount of the asphalt mixture input into the hopper 3 from the discharge port 30. I have. in this way,
The discharge port 30 is opened and closed with a simple configuration such that the flat opening and closing plate 27 is slid in the front-rear direction by the cylinder 28, and the degree of opening and closing of the discharge port 30 is changed by adjusting the sliding amount of the opening and closing plate 27. Since the discharge amount of the asphalt mixture is adjusted, the discharge amount of the asphalt mixture can be surely adjusted without a failure, and the configuration can be made inexpensive and compact.

On the left and right sides of the lower hopper 21, side plates 35, 35 extending downward to the vicinity of the ground contact surface are disposed, and the side plates 35, 35 are disposed in the front-rear direction to discharge the lower hopper 21. Crawler traveling device 2 from the outlet 30 forming part
To the vicinity of the rear end. Thus, the side plate 3
By providing 5.35 on the left and right sides of the lower hopper 21, the asphalt mixture discharged from the discharge port 30 is prevented from spreading to the left and right and flowing out to the crawler type traveling device 2.2, and the asphalt mixture is prevented. Can be reliably spread by the screed 5.

As shown in FIG. 6, the lower guide plates 36 project inward from the side plates 35 below the opening / closing plate 27,
Right and left side plates 21b and 21 of the lower hopper 21
b is bent in the horizontal direction at the lower end to form an upper guide 21d.
21d is formed, and the open / close plate 27 is slidably sandwiched between the upper guide portions 21d and 21d and the lower guide plates 36. The opening / closing plate 27 moved back and forth by the cylinder 28 slides between the upper guide portion 21d and the lower guide plate 36 to open and close the discharge port 30. In this manner, the opening / closing plate 27 slides between the upper guide portion 21d formed by bending the lower end portions of the left and right side plates 21b in the horizontal direction and the lower guide plate 36 disposed below the upper guide portion 21d. By doing so, it is possible to make the asphalt mixture difficult to penetrate into the sliding portion of the opening and closing plate 27, to ensure smooth opening and closing of the opening and closing plate, and to prevent failure of the sliding portion of the opening and closing plate. can do.

Further, the back plate 21c of the lower hopper 21 is of a fixed type in this embodiment, but may be configured to be vertically openable and closable as follows. That is, as shown in FIG. 7, an opening 21e is opened below the back plate 21c at the rear end of the lower hopper 21, and a rear opening / closing plate 37 for closing the opening 21e is provided. The rear opening / closing plate 37 is configured to be vertically movable, and a cylinder 38 is interposed between the rear opening / closing plate 37 and the vertical plate 26. The opening and closing of the opening 21e is performed by moving the rear opening and closing plate 37 up and down by driving the cylinder 38 to expand and contract, and the asphalt mixture put into the hopper 3 is transferred from the opening 21e to the pavement surface. It is possible to discharge. Also, by adjusting the opening / closing degree of the rear opening / closing plate 37 to change the opening area of the opening 21e, it is possible to adjust the discharge amount of the asphalt mixture from the opening 21e.

In this manner, the opening / closing portion 21e of the back plate 21c is opened and closed to adjust the discharge amount of the asphalt mixture with a simple structure in which the flat rear opening / closing plate 37 is vertically moved by the cylinder 38. By doing
The discharge amount of the asphalt mixture can be surely adjusted without failure, and the configuration can be made inexpensive and compact. In addition, by adjusting the discharge amount of the asphalt mixture in combination with the adjustment by the opening and closing plate 27 of the discharge port 30 and the adjustment by the rear opening and closing plate 37 of the opening 21e, the range of the adjustment of the discharge amount can be increased. Becomes possible.

Next, the structure of the screed 5 at the rear of the body 1 will be described. As shown in FIGS. 1, 2, 4, and 8, the screed 5 is formed in a box shape having an open top, and as shown in FIG.
It is configured such that the asphalt mixture is spread and leveled by the bottom surface 5a in a posture inclined only by that.

Also, the leveling arms 51, 51 extend rearward from the middle of the left and right crawler traveling devices 2, 2.
Are extended, and the front end 5 of the leveling arm 51 is
1a is rotatably supported by the crawler traveling device 2. The left and right leveling arms 51, 51 are arranged outside the crawler type traveling device 2, with a width substantially equal to the vehicle width of the asphalt spreader, and the leveling arms 51, 51 are also provided. Are connected by a connecting pipe 55 so as to be integrally rotatable up and down.

Cylinder brackets 56 project rearward from substantially right and left centers of the rear end of the body 1, and the cylinder brackets 56 allow the height adjusting cylinder 54 composed of an electric power cylinder or the like to rotate freely. I support it. A lower end of the height adjusting cylinder 54 is connected to the front end of the screed 5 at a substantially right and left center through a cross joint 59 so as to be rotatable back and forth and left and right, and a connecting pipe for connecting the left and right leveling arms 51. 55.

An angle adjusting screw 57 is attached to each of the rear ends of the leveling arms 51. The lower ends of the angle adjusting screws 57
The rear end is connected to the left and right ends. The angle adjusting screw 5
The screed 5 is connected to the screed 5 via a plurality of shackles 58 connected in series. The screed 5 is configured to be rotatable in the front-rear and left-right directions with respect to the angle adjusting screw 57. I have.

As described above, the screed 5 is supported by the leveling arms 51 via one height adjusting cylinder 54 and the angle adjusting screw 57, and by driving the height adjusting cylinder 54 to expand and contract, The screed 5 is rotated up and down around the front end 51a of the leveling arm 51 so that the level of the asphalt mixture spread by the screed 5 can be adjusted. Also, a handle 57a of the left and right angle adjusting screws 57
By rotating the screed 5, the angle adjusting screw 57 can be expanded and contracted to adjust the vertical height of the left and right ends of the screed 5. That is, by adjusting the vertical height of the left and right ends of the screed 5, the inclination angle of the screed 5 in the front-rear direction, that is, the inclination angle α, and the inclination angle in the left-right direction can be adjusted.

As described above, the both ends of the screed 5 extending from the crawler-type traveling device 2 on the vehicle body 1 side are supported by the leveling arms 51 so as to be vertically movable, and the screed 5 is held at substantially the right and left central portions. A pavement for restoring the leveling height of the screed 5 with a simple and inexpensive configuration by allowing the vertical height of the screed 5 to be adjustable by the expansion and contraction operation of one supporting height adjusting cylinder 54. It is possible to easily and stably adjust according to the surface. Also, the left and right leveling arms 51, 51 and the screed 5
And the left and right ends are connected by angle adjusting screws 57
By expanding and contracting the angle adjusting screws 57 by rotating the handle 57a, the inclination of the screed 5 in the front-rear direction and the inclination in the left-right direction can be adjusted.
With a simple and inexpensive configuration, it is possible to easily adjust the leveling height of the screed 5 according to the inclination and condition of the pavement surface. Further, since the leveling arms 51 and 51 are disposed with the same width interval as the left and right width of the vehicle body 1, the asphalt spreader can be made compact.

A plate heater 52 constituted by a gas heater is disposed in the screed 5, and the screed 5 can be heated by the plate heater 52. The plate heater 52 is disposed over substantially the entire width of the screed 5 in the left and right direction.
Is heated uniformly throughout. As shown in FIG. 2, the plate heater 52 is connected to, for example, a gas cylinder 61 provided in the front part of the body 1 and receives a supply of fuel gas from the gas cylinder 61.

By using the plate heater 52 to heat the entire screed 5, the asphalt mixture discharged from the hopper 3 onto the pavement surface is spread by the screed 5. , Asphalt mixture does not solidify without lowering the temperature. Thereby, it is possible to prevent the asphalt mixture from coming into contact with the screed in the low-temperature portion as in the case where the screed is locally heated, and to prevent the temperature of the asphalt mixture in that portion from lowering. It is possible to finish neatly.

The extension plates 60 are detachably attached to the left and right end surfaces of the screed 5. The extension plate 60 is a box-shaped member having the same side surface shape as that of the screed 5 and having an open top. By attaching the extension plate 60 to both left and right end surfaces of the screed 5, the spread width of the screed 5 can be increased. Therefore, in this asphalt spreader, the extension plate 60 can be attached to and detached from the screed 5 in accordance with the width of the left and right pavement surfaces, and the spread width can be adjusted. . The extension plate 60 is attached to the screed 5 using, for example, bolts.

Further, on the outer surfaces of the extension plates 60, 60 attached to the left and right end surfaces of the screed 5, side guide plates 53, which are plate-like members whose front ends are bent obliquely outward, are attached. ing. The side guide plate 53 protrudes forward from the screed 5 to prevent the asphalt mixture discharged on the pavement surface from spreading outside the left and right widths of the screed 5 and the extension plates 60. The spread width of the material is limited to the left and right widths of the screed 5 and the extension plates 60. Thereby, the spread width of the asphalt mixture can be made uniform, and the pavement surface can be finely finished. When the extension plates 60 are not attached to the screed 5, the side guide plate 53 can be attached to the outer surface of the screed 5.
The spread width can be limited to the left and right width of the screed 5.

In addition, the asphalt spreader includes a hopper 3 for discharging the stored asphalt mixture to a pavement surface at one of the front and rear sides of a vehicle body 1 having a crawler type traveling device 2. Since the screed 5 for spreading the asphalt mixture can be attached to the end of the vehicle body 1 on the side opposite the hopper 3, the asphalt mixture can be used for temporary restoration of the pavement surface. The asphalt spreader configured to be adjustable in thickness can be configured simply, compactly and inexpensively, and the work load on the operator can be reduced. In addition, since it can be configured with a simple structure, there are few failures, work can be performed quickly, and maintenance is simple.

[0034]

As described above, the present invention has the following advantages. That is, as in claim 1,
In an asphalt spreader that discharges asphalt mixture stored in a hopper onto a pavement surface and spreads it, an outlet is opened at the bottom of the hopper, and the outlet is slid horizontally to open and close the outlet. Since the opening and closing plate is provided and the opening and closing plate is connected to the actuator, it is possible to adjust the discharge amount of the asphalt mixture with a simple configuration,
It is possible to equalize the thickness to a certain thickness, and it is possible to adjust the discharge amount of asphalt mixture without failure and to make the asphalt spreader cheaper and more compact. Thus, the burden on the operator can be reduced. Further, since the discharge amount can be adjusted by opening and closing by the actuator, the operation force is small and fine adjustment can be easily performed.

Further, the lower end portions of the left and right side plates constituting the side wall of the hopper are bent in the horizontal direction to form an upper guide portion, and a lower guide plate is disposed below the upper guide portion. Since the opening and closing plate is slidably interposed between the upper guide portion and the lower guide plate, it is possible to make the asphalt mixture difficult to penetrate into the sliding portion of the opening and closing plate. The smooth opening and closing of the opening / closing plate can be ensured, and failure of the sliding portion of the opening / closing plate can be prevented.

Further, in the asphalt spreader which discharges the asphalt mixture stored in the hopper disposed at the front part on the pavement surface and spreads the same, the back plate constituting the rear end face of the hopper is further characterized by the following features. An opening is provided at the lower part, and an opening / closing plate is provided at the opening so as to be able to open and close the opening by sliding vertically, and the amount of sliding of the opening / closing plate is adjustable. It is possible to open and close the opening of the asphalt mixture and adjust the discharge amount of asphalt mixture, and it is possible to adjust the discharge amount of asphalt mixture without failure and to make the asphalt laying machine inexpensive In addition, it can be configured compactly, and the burden on the operator can be easily reduced. In addition, by adjusting the discharge amount of the asphalt mixture in combination with the adjustment of the degree of opening and closing of the discharge port opening at the bottom of the hopper and the adjustment of the degree of opening and closing of the opening part, the range of discharge amount adjustment can be increased. It becomes possible.

Further, the asphalt laying machine according to claim 4, wherein a wing portion capable of widening an inlet above the hopper into which the asphalt mixture is introduced is foldable, wherein a folding position of the wing portion is provided. The wing portion is provided with a stopper, and the wing portion is held at the folded position by its own weight, so that the wing portion can be stably stored in a folded state by the stopper. In addition, since the wing portion is rotated and maintained in a stable direction by its own weight, it does not open due to vibration or the like, the configuration of the stopper can be simplified, components for locking can be omitted, and an inexpensive configuration can be achieved. can do.

[Brief description of the drawings]

FIG. 1 is a side view showing an asphalt spreader according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is a side view showing a stopper that locks the first and second wing portions of the hopper in a folded state.

FIG. 6 is a front view showing a slide structure of an opening and closing plate for opening and closing a discharge port of the hopper.

FIG. 7 is a side cross-sectional view illustrating a hopper configured to be able to open and close a lower portion of a back plate.

FIG. 8 is a side view showing a screed arranging portion at a rear portion of the machine body.

FIG. 9 is a side view showing a posture during a screed spreading operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Crawler type traveling apparatus 3 Hopper 5 Screed 17 Operation step 21 Lower hopper 21a Bottom plate 21b Side plate 21c Back plate 21d Upper guide part 21e Opening 22 First wing part 23 Second wing part 27 Opening / closing plate 28 Cylinder 30 Discharge port DESCRIPTION OF SYMBOLS 31 Stopper 37 Rear opening / closing plate 38 Cylinder 51 Leveling arm 52 Plate heater 53 Side guide plate 54 Height adjusting cylinder 57 Angle adjusting screw 60 Extension plate

Claims (4)

[Claims] 1. An asphalt spreader that discharges asphalt mixture stored in a hopper onto a pavement surface and spreads the asphalt mixture, opening a discharge port on a bottom surface of the hopper, and sliding the discharge port in a horizontal direction. An asphalt spreader comprising an opening / closing plate capable of opening and closing the discharge port, and the opening / closing plate being connected to an actuator. 2. A lower guide plate is formed by bending lower end portions of left and right side plates forming side walls of the hopper in a horizontal direction, and a lower guide plate is disposed below the upper guide portion. 2. The asphalt spreader according to claim 1, wherein the opening / closing plate is slidably interposed between a portion and a lower guide plate. 3. An asphalt spreader that discharges and spreads asphalt mixture stored in a hopper disposed at a front portion on a pavement surface, wherein an opening is provided at a lower portion of a back plate that constitutes a rear end surface of the hopper. An asphalt spreader, characterized in that an opening / closing plate is provided in the opening so as to be able to open and close the opening by sliding in the vertical direction, and the amount of sliding of the opening / closing plate is adjustable. 4. An asphalt laying machine capable of folding a wing portion capable of widening an input port above a hopper into which asphalt mixture is introduced, wherein a stopper is provided at a folding position of the wing portion, An asphalt laying machine characterized in that it is configured to be held at a folded position by its own weight of a wing portion.