JP3184759B2 - Asphalt finisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an asphalt finisher.

[0002]

2. Description of the Related Art FIG. 5 shows that a conventional asphalt finisher (hereinafter simply referred to as a finisher) is mounted on a hopper 2 provided at a front portion of a finisher body 1 during paving work, and a vessel 3 of a dump truck (hereinafter simply referred to as a dump) is provided. This shows a situation where the mixture 4 is being supplied.

[0003] At this time, the finisher pushes the rear wheels 7 of the dump with bumper rollers 6 attached to the left and right of the hopper frame 5 at the front end of the hopper, and advances together with the dump. Pave construction while receiving material 4.

In the above-mentioned operation, the dump is restrained at the front part of the finisher for a long time for the following reason.

Usually, the amount of the mixture that can be received at one time by the finisher hopper 2 is smaller than the amount of the mixture loaded in the dump vessel 3, and therefore, the mixture is provided at the bottom of the finisher body 1 and the hopper 2. According to the situation where the mixture 4 is sent to the screed 9 at the rear part of the finisher by the bar conveyor 8 and the inner volume of the hopper 2 becomes empty,
This is because a construction method is adopted in which the mixture 4 is received into the hopper 2 over time from the inclined vessel 3.

As an additional reason, the difference between the height of the rear lower end of the vessel 3 inclined by the dumping operation and the height of the bottom of the hopper 2 cannot be easily increased for both reasons. Since the dump vessel 3 cannot take a convenient dump position with respect to the hopper 2, even if the hopper capacity of the finisher is increased as much as the amount of the mixture in the vessel 3, the mixture 4 remains at the front end of the hopper 2. There is a situation that it is released and does not reach the rear of the hopper 2.

[0007]

As described above, in the conventional finisher, it is necessary to adopt a method of receiving the mixed material 4 from the dump vessel 3 in the hopper 2 at the front of the machine while the finisher advances during the pavement work. However, there is a problem that the operation rate of the dump is not good because the dump is restrained by the front portion of the hopper for a long time to supply the mixture to the finisher.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made to reduce the time required for a vehicle for transporting a mixture to be supplied to an asphalt finisher. It is an object of the present invention to provide an asphalt finisher capable of improving the efficiency.

[0009]

According to the first aspect of the present invention, an inclined guideway body having a slope for pushing up a mixture discharge side of a mixture transport vehicle is rotatable at a front portion of a hopper. It is an asphalt finisher that is pivotally supported. Then, the mixture discharge side of the mixture transport vehicle is pushed up to a height at which the mixture can be received in the entire hopper volume.

According to a second aspect of the present invention, in the asphalt finisher according to the first aspect, a slope is provided by a triangular side plate having an apex at an end on the hopper side and a step board having a slope having a width slightly smaller than the hopper. A gantry frame of the guide path body is formed, and an upper portion of the hopper side end of the gantry frame is rotatably connected to an upper portion of a hopper frame located at a front end of the hopper by a hinge. When the gantry frame is rotated toward the hopper with the hinge as a fulcrum, the gantry frame is stored in the hopper.

According to a third aspect of the present invention, in the asphalt finisher according to the first aspect, wheels are provided via a suspension spring on the ground side of the inclined guide path body.
And, when the mixture transport vehicle rides on the inclined guideway body, the inclined guideway body is grounded by its weight, and when it descends from the inclined guideway body, the resilient force of the suspension spring moves the inclined guideway body from the ground. Float and move the inclined guideway unit with the finisher.

According to a fourth aspect of the present invention, in the asphalt finisher according to the first aspect, the inclined guide path body is moved between a storage position in the hopper and a ground contact position in front of the hopper by a link mechanism operated by a hydraulic cylinder. It turns with.

According to a fifth aspect of the present invention, in the asphalt finisher according to any one of the first to fourth aspects, the inclined guideway body is provided so as to be foldable on the way. When the inclined guideway body is folded, it is stored compactly, and when extended, a gentle slope is ensured by a long slope.

[0014]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. The same parts as those of the conventional asphalt finisher shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 1, during a paving operation of an asphalt finisher (hereinafter, simply referred to as a finisher), a dump truck (hereinafter, simply referred to as a dump) as a mixture transport vehicle is restrained at a front portion of a hopper 2. In order to reduce the time, the capacity of the hopper 2 at the front of the finisher is improved to a size commensurate with the amount of the mixture in the vessel 3 of the dumper, and the movable inclined guideway body ( (Hereinafter referred to as guideway) 11.

That is, in response to the discharge of the mixture 4 from the inclined vessel 3 of the dump, the mixture discharge side of the dump (the rear portion of the dump) has a height such that the mixture 4 can be effectively received in the entire hopper volume. In order to push up, a movable guideway 11 having an inclined slope is rotatably supported at the front of the hopper 2.

The guideway 11 forms a gantry frame 12 by a triangular side plate having an apex at an end on the hopper side and a step board having a hill having a width slightly smaller than that of the hopper 2. The upper end is rotatably connected to the upper portion of a hopper frame 13 located at the front end of the hopper by a hinge 14.

That is, a hydraulic cylinder is operated between the hopper frame 13 and the gantry frame 12 so that the guideway 11 rotates between the storage position in the hopper 2 and the ground contact position in front of the hopper. A link mechanism (FIG. 2) is provided.
During the pavement construction, the guideway 11 is installed so as to protrude to the ground contact position.

A plurality of moving wheels 15 are arranged in the traveling direction (front-rear direction) on the left and right sides of the guide frame 11 in the gantry frame 12 with respect to the traveling direction. Each of these wheels 15 is connected to a gantry frame 12 via a suspension spring 16.
Mounted on

As shown in FIG. 2, the link mechanism is provided with a guide means 21 such as a long hole or a long groove in the vertical direction on the upper part of the hopper frame 13, and is fitted on the upper part of the gantry frame 12 by the guide means 21. The hinge pin 14a is vertically movable within a limited range, and the rod end of the hydraulic cylinder 22 is connected to the lower part of the hopper frame 13 by a pin 23.
The other ends of one link 25 are connected to the hopper frame 13 by pins 27, and the other end of the other link 26 is connected to the gantry frame 12 by pins 28.

Therefore, by extending the rod of the hydraulic cylinder 22, one of the links 25 is rotated around the pin 27 and the other is rotated while pushing up the other link 26, as shown by a two-dot chain line. Then, the gantry frame 12 can be inverted into the hopper 2 by the link 26.

Next, a description will be given of a method of reducing the restraint time of the dump with respect to the front of the hopper in the above embodiment.

When the finisher performs paving work,
Guideway 11 stored in hopper 2 at the front of the machine
Is driven by a hydraulic cylinder 22 which is activated by a button operation, and is turned forward with the hinge 14 as a fulcrum, and is installed on the ground in front of the hopper.

In this state, the wheels 15 of the guideway 11 are in contact with the ground, but the gantry frame 12 of the guideway 11 is separated from the ground by the repulsive force of the suspension spring 16, and the guideway 11 is also smoothly moved with the advance of the finisher. To move forward.

The mixture 4 is supplied from the dump vessel 3 to the hopper 2
The finisher temporarily stops paving work and stops when receiving it. The dump goes up the slope while moving backward on the guideway 11, and the trailing end of the dump can have a height and a position sufficient to effectively discharge the mixture 4 with respect to the entire volume of the hopper.

When the dump is on the guideway 11, the suspension spring 16 is compressed by the weight of the dump, and the frame 12 of the guideway 11 is grounded, so that the weight of the dump can be received directly on the ground.

On the other hand, when the dump falls from the guideway 11, the gantry frame 12 of the guideway 11 floats from the ground due to the repulsive force of the suspension spring 16, so that it can move freely with the finisher.

At the end of the work, the gantry frame 12 is
Is pivoted toward the hopper with the fulcrum as a fulcrum, and is stored in the hopper 2.

FIGS. 3 and 4 show another embodiment of the present invention, in which the frame of the guideway 11 is a folding type in view of the size and volume of the hopper 2 to be stored.

That is, as shown in FIG. 3, the gantry frame 12b on the tip end side is
A hinge 31 provided between them makes it freely foldable on the way.

As shown in FIG. 4, the hopper frame 13 and the gantry frame 12a on the hopper side are rotated so that the guideway 11 rotates between the storage position in the hopper 2 and the ground contact position in front of the hopper. A link mechanism operated by the hydraulic cylinder 22 is provided therebetween. Since this link mechanism is the same as that shown in FIG. 2, the same reference numerals are given and the description is omitted.

At the time of non-construction, the gantry frames 12a and 12b of the guideway 11 are folded and stored compactly in the hopper 2 as shown in FIG. 3, and when used, the gantry frames 12a and 12b are driven by cylinder power. It is extended and installed on the ground in front of the hopper,
By means of the sloping road continuously formed by a and 12b, the mixture discharge side of the dump is pushed up to a height at which the mixture 4 can be received in the entire hopper volume.

As a means for rotating the guideway 11, a rotary actuator may be used. However, by using the link mechanism combined with the hydraulic cylinder as described above, it is possible to cope with the floating / grounding operation of the guideway 11. There is an advantage that is easy to do.

[0034]

According to the first aspect of the present invention, the material discharge side of the material transport vehicle is pushed up by the inclined guide path body which is rotatably supported at the front of the hopper, so that the vehicle can be removed from the transport vehicle. A large amount of mixture can be supplied to the entire hopper volume at a time, eliminating the need for the transport vehicle to be continuously restrained by the asphalt finisher under construction, and improving the operation rate of the transport vehicle.

According to the second aspect of the present invention, the upper end of the hopper side of the gantry frame formed by the triangular side plate and the step board having the slope slightly narrower than the hopper is attached to the upper part of the hopper frame by the hinge. Since the frame is rotatably connected, the gantry frame can be housed in the hopper by rotating the gantry frame to the hopper side with the hinge as a fulcrum when not working.

According to the third aspect of the present invention, when the mixture transporting vehicle rides on the inclined guideway, the inclined guideway can be grounded by its weight and stabilized on the ground,
Further, when the mixture transporting vehicle descends from the inclined guide path body, the inclined guide path body is lifted from the ground by the suspension spring, and the smooth movement of the inclined guide path body can be secured.

According to the fourth aspect of the present invention, the inclination guide path body is rotated by the link mechanism operated by the hydraulic cylinder, thereby storing the inclination guide path body in the hopper and guiding the inclination forward of the hopper. The road body can be easily grounded.

According to the fifth aspect of the present invention, when the inclined guideway body is folded, it can be stored compactly, and when the inclined guideway body is extended, a gentle slope can be ensured by the long sloping road. The vehicle can be easily climbed on the inclined guideway body.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an asphalt finisher according to the present invention.

FIG. 2 is an enlarged view of a link mechanism for rotating an inclined guideway body of the finisher.

FIG. 3 is a front view showing another embodiment of the same finisher.

FIG. 4 is an enlarged view of a link mechanism for rotating the inclined guideway body of the finisher.

FIG. 5 is a front view showing a conventional asphalt finisher.

[Explanation of symbols]

 2 Hopper 11 Inclined guideway (guideway) 12 Mounting frame 13 Hopper frame 14 Hinge 15 Wheel 16 Suspension spring 22 Hydraulic cylinder

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E01C 19/48

Claims (5)

(57) [Claims] 1. An asphalt finisher wherein an inclined guide path body having a slope for pushing up a mixture discharge side of a mixture transport vehicle is rotatably supported at a front portion of a hopper. 2. A gantry frame of an inclined guideway body is formed by a triangular side plate having an apex at a hopper side end and a step board having a sloping road slightly narrower than the hopper, and the hopper side end of the gantry frame is formed. The asphalt finisher according to claim 1, wherein the upper portion is rotatably connected to an upper portion of a hopper frame located at a front end of the hopper by a hinge. 3. The asphalt finisher according to claim 1, wherein wheels are provided on a ground contact side of the inclined guideway body via a suspension spring. 4. The asphalt finisher according to claim 1, wherein the inclined guideway body is rotated between a storage position in the hopper and a ground contact position in front of the hopper by a link mechanism operated by a hydraulic cylinder. 5. The asphalt finisher according to claim 1, wherein the inclined guideway body is provided so as to be foldable on the way.