JPH11322040A - Aggregate carrying device for paving equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the power loss, and to improve the homogenous property of the aggregate density in a aggregate carrying device applied for paving equipment by installing plural carrying plates continuously onto chains wrapped around a driving sprocket and a driven wheel supported with a space in the fore and aft direction of a machine body. SOLUTION: A paving equipment (asphalt finisher) has an aggregate carrying device 5 for receiving the aggregate 3 inside of a hopper arranged in front of a machine body and for carrying the aggregate 3 to a rear pat of a machine 2. The aggregate 3 carried by the aggregate carrying device 5 is laid on a road surface by a conveyor screw. In this case, the aggregate carrying device 5 is formed by continuously installing plural carrying plates 56 between a pair of chains 55 wrapped around driving sprockets 53, which are provided on driving shaft 51 arranged in parallel with each other with a space in the fore and aft direction of the machine body, and driven wheels 54 provided on a driven shaft 52. These carrying plates 56 are arranged without generating a clearance at a straight part of the chain 55 so as to prevent a fall of the aggregate on the way of carrying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite material conveying device applied to a pavement machine such as an asphalt finisher or a concrete finisher.

[0002]

2. Description of the Related Art A pavement machine such as an asphalt finisher or a concrete finisher is used for road paving or the like. This type of paving machine includes a hopper disposed at the front of the machine for receiving the mixture, a mixture transport device for transporting the mixture stored in the hopper to the rear of the machine, and a rear hopper disposed at the rear of the machine. A conveyer screw for spreading the mixed material conveyed by the mixed material conveying device on the road surface, and compacting the mixed material spread behind the conveyer screw and spread on the road surface by the conveyer screw to finish the surface smoothly. And a screed device.

[0003] The above-described composite material transfer device for a paving machine is provided with a drive shaft and a driven shaft arranged in parallel in the front-rear direction of the fuselage, and mounted on the drive shaft at a predetermined interval. A pair of driven sprockets, a pair of driven wheels mounted on the driven shaft at predetermined intervals, a pair of chains respectively wound around the pair of driven sprockets and the pair of driven wheels, And a plurality of bars arranged at a predetermined distance between the chains, and a floor plate arranged below a chain portion passing above the pair of chains. The mixture transport device configured as described above transports the mixture accommodated in the hopper on the floorboard while raking the mixture with a bar.

[0004]

However, the above-mentioned conventional mixture transporting device transports the mixture on the floorboard while collecting the mixture by a bar disposed between a pair of chains. Shear resistance and frictional resistance with the floorboard
These resistances result in very large power losses. This power loss accounts for 20 to 30% of the total horsepower consumed during construction of the pavement machine, and how to reduce the power loss due to each of the resistances is one of the technical issues in the pavement machine. There is also a problem that the bar and the floor plate are worn by the shear resistance and the friction resistance. Also,
If the transport speed of the composite material transport device is increased in order to increase the transport capacity of the composite material, separation of the raw aggregate is likely to occur when the composite material is supplied to the front of the screed. Furthermore, when the bar starts to pass under the fuselage immediately after the mixture is supplied, the mixture deposited on the front side of the conveyor screw is scraped by the bar toward the front of the lower part of the fuselage. In particular, there is a problem that the mixture is concentrated on the chain case portion for driving the conveyor screw), and the density of the mixture is increased only in that portion. In addition, in the case where two composite material transporting devices are arranged, it is necessary to dispose a cover member that covers the chain in the center part, so that the aggregate is concentrated on a portion corresponding to the width of the cover member. There are also problems.

[0005] The present invention has been made in view of the above-mentioned facts, and its main technical problems are to reduce power loss and power consumption, and to reduce aggregate on a pavement surface after leveling. It is an object of the present invention to provide a mixture transporting device for a pavement machine capable of reducing occurrence of uneven stones and unevenness due to separation and improving uniformity of mixture density.

[0006]

According to the present invention, in order to attain the above-mentioned main technical objects, a mixture accommodated in a hopper arranged at a front portion of a body is replaced with a screed arranged at a rear portion of the body. In a mixture transport device for a pavement machine for transporting to a front side of a device, a drive shaft and a driven shaft disposed in parallel with a space in a front-rear direction of the body, a drive sprocket mounted on the drive shaft, and A driven wheel mounted on the shaft,
A composite material transporting device for a pavement machine, comprising: the drive sprocket; a chain wound around the driven wheel; and a plurality of transport plates continuously mounted on the chain. .

[0007] The width of the transport plate is set to a size corresponding to the interval between the pins connecting the link plates constituting the chain. In addition, a chain guide plate is provided between the driving sprocket and the driven wheel below a chain portion passing above the chain. It is desirable that the transport plate has a double-sided portion at both ends, and that both end portions of adjacent transport plates overlap each other. The transport plate has both ends in the width direction mounted on a pair of chains. The transport plate may be attached to a single chain at the center in the width direction.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of an apparatus for transporting a mixture for a pavement machine according to the present invention.

FIG. 1 shows an asphalt finisher as a paving machine equipped with a mixture transport device constructed according to the present invention. The asphalt finisher as the illustrated paving machine includes a hopper 4 arranged at the front of the machine of the machine body 2 for receiving the mixture 3 and a hopper 4 for transporting the mixture 3 contained in the hopper 4 to the rear of the machine 2. A conveyor screw 6 disposed at the rear of the body 2 to spread the mixture 3 conveyed by the mixture transport device 5 on the road surface; and a conveyor screw 6 disposed behind the conveyor screw 6. And a screed device 7 for compacting the mixture spread on the road surface and smoothing the surface. At the center of the machine 2, an engine 8 as a drive source for operating the mixture transport device 5, the conveyor screw 6, the screed device 7, and the like is disposed above the mixture transport device 5. At the rear of the machine 2, operator seats 9, 9 are disposed above the conveyor screw 6.

The hopper 4 is a container for receiving a mixture discharged from a dump or the like, and a mixture adjusting gate 41 is provided at a rear end (lower end in FIG. 1). The mixture feed amount adjusting gate 41 is disposed above the mixture transport device 5 and is provided with a predetermined switch in a control panel 90 disposed in front of one (right side in FIG. 1) of the worker seat 9. By operating a hydraulic jack (not shown) for a gate by a not-shown, the gate is moved up and down so that the distance between the lower end thereof and the mixture transporting device 5 is adjusted. The composite material transfer device 5 will be described later in detail. The conveyor screw 6 is arranged in the width direction of the body 2 (the left-right direction in FIG. 1).
And is operatively connected to the engine 8 via a power transmission mechanism (not shown). The conveyor screw 6 is driven to rotate by the power of the engine 8 and diffuses the mixture 3 conveyed by the mixture conveying device 5 in the left and right direction on the road surface. The screed device 7 includes a tamper device, a vibrator device, and the like (not shown). The screed device 7 compacts the mixture spread on the road surface by the conveyor screw 6 and smoothes the surface.

Next, the composite material conveying device 5 will be described with reference to FIGS. The mixture transport device 5 in the illustrated embodiment is disposed in the front-rear direction (vertical direction in FIG. 1) of the body 2. The composite material transfer device 5 includes
Drive shafts 51 arranged in parallel at an interval in the front-rear direction
And a driven shaft 52. A pair of drive sprockets 5 mounted at a predetermined interval are mounted on the drive shaft 51.
3, 53 are mounted. A pair of driven wheels 54, 54 are mounted on the driven shaft 52 at the same interval as the interval between the pair of driving sprockets 53, 53. A pair of chains 55, 55 are wound around the pair of driving sprockets 53, 53 and the pair of driven wheels 54, 54, respectively.
A plurality of transport plates 56 are placed on the pair of chains 55, 55.
Are mounted continuously. The transport plate 56 has a pair of chains 55, 5 at both ends as shown in FIGS.
5, all the link plates 551, 5
51, and the link plate 55 is welded.
1,551 are attached. The transport plate 56 may be attached to the link plates 551 and 551 by fixing means such as bolts. The transport plate 56 has a width L set to a dimension corresponding to a distance S between the pins 552 connecting the link plates 551, 551, and is continuously mounted on the link plates 551, 551. ing. Therefore, the transport plate 56 is disposed without any gap in the linear portion of the chain, and the placed mixture does not drop during transport. In order to prevent the mixture from entering the gaps between the transport plates 56, overlapping portions 561 and 562 are provided at both ends of each transport plate 56 as shown in FIG. May be configured so that both end portions thereof overlap each other.

Each of the chain guide plates 5 is provided below the chain portion passing above the pair of chains 55, 55.
7, 57 are provided. This chain guide plate 57
The chain 55 is disposed between the driving sprocket 53 and the driven wheel 54 and attached to the lower chassis 21 of the body 2 by a suitable fixing means. The slack is prevented and the movement of the chain 55 is guided. Note that a cover member 10 that covers both ends of the chains 55, 55 and the transport plate 56 is disposed above both ends of the plurality of transport plates 56 that are continuously attached to the pair of chains 55, 55. It is fixed to the lower chassis 21 of the body 2 by appropriate fixing means. The drive shaft 51 of the composite material transporting apparatus 5 configured as described above has a sprocket 1 attached to one end thereof.
11, the engine 112 via a power transmission mechanism 11 such as a chain 112, a sprocket 113, and a transmission shaft 114.
Transmission connection.

The composite material transporting device 5 in the illustrated embodiment is configured as described above, and its operation and effect will be described below. The power of the engine 8 is transmitted to the power transmission mechanism 11.
When the drive shaft 51 is transmitted to the drive shaft 51 via the
Is driven to rotate in the direction indicated by the arrow. As a result,
A pair of drive sprockets 5 mounted on the drive shaft 51
3 and 53 are also rotated in the direction of the arrow, and the pair of chains 55, 55 and the plurality of transport plates 56 mounted on the chains 55, 55 are moved in the direction indicated by the arrow. When the plurality of transport plates 56 move in the direction of the arrow, a part of the composite material 3 accommodated in the hopper 4 moves on the transport plate 56 and moves by a predetermined amount when passing through the composite material feed amount adjustment gate 41. Is regulated. Then, the mixture on the transport plate 56 is further moved in the direction of the arrow, and is discharged onto the conveyor screw 6 disposed at the rear of the machine 2.

In the above-described composite material transporting apparatus 5, since the plurality of transport plates 56 only move while receiving the static load of the composite material, the shear resistance between the bar and the composite material and the friction between the bar and the floor plate described above. Horsepower consumption is greatly reduced as compared with a conventional bar-type composite material transfer device in which resistance occurs. Further, in the composite material transporting apparatus 5 according to the illustrated embodiment, since the composite material is transported on a plurality of transport plates 56, the composite material remains on the floor plate as in the conventional bar-type composite material transport apparatus. And the transport efficiency can be theoretically improved to 100%. Further, in the composite material transporting device 5 according to the illustrated embodiment, since there are no worn parts such as bars and floor plates in the conventional bar-type composite material transporting device, maintenance costs such as component replacement can be reduced. Further, in the mixture transporting device 5 according to the illustrated embodiment, a pair of chains 5
5 and 55 are covered by the plurality of transport plates 56, and the mixture spilled from the cover member 10 does not bite into the chains 55, 55, so that the chain is prevented from being broken due to biting of the mixture. can do.

Next, another embodiment of the composite material conveying apparatus constituted by the present invention will be described with reference to FIG. It should be noted that members that are substantially the same as those of the embodiment shown in FIGS. 1 to 4 are given the same reference numerals, and detailed descriptions thereof are omitted. In the embodiment shown in FIG. 6, a chain guide plate 57 is provided between the lower chassis 21 of the body 2. Two mixture transporting devices are disposed above the chain guide plate 57. Each transfer plate 56,
Reference numeral 56 denotes a lower portion in the center in the width direction, which is attached to the chain 55. With this configuration, the transport plate 56 can be supported and moved by one chain 55. In addition,
In the case of arranging two mixture transporting devices as in the embodiment shown in FIG. 6, the cover member 10 is disposed on the upper side where the transporting plates 56 and 56 are opposed to each other. This cover member 10
It is not necessary to provide a large cover member for covering the entire chain unlike the conventional one, and a small cover member for preventing intrusion of the mixture through the gap between the transport plates 56 may be provided.

As described above, the present invention has been described based on the illustrated embodiments. However, the present invention is not limited to the above-described embodiments, but can be variously modified or modified within the scope of the present invention. is there.

[0017]

As described above, the composite material transfer device for a pavement machine according to the present invention has the following functions and effects.

That is, according to the present invention, the plurality of transport plates mounted on the pair of chains only move while receiving the static load of the mixture, so that the horsepower consumption is greatly reduced. In addition, in the composite material transporting device according to the present invention, the composite material is transported with the composite material placed on a plurality of transport plates, so that the transport efficiency can be theoretically improved to 100%. Therefore,
Since the transport speed can be reduced, the coarse aggregate is less likely to be separated when the mixture is supplied to the front of the screed. Further, in the composite material transporting device according to the present invention, since there are no wear parts such as bars and floor plates in the conventional bar-type composite material transporting device, maintenance costs such as replacement of components can be reduced. Further, in the mixture transport device according to the present invention,
Since the pair of chains is covered with the plurality of transport plates, and the mixture does not bite into the chains, it is possible to prevent the chain from being damaged due to biting of the mixture. Further, in the mixture transport device according to the present invention,
A large cover member that covers the entire chain becomes unnecessary, and a small cover member may be provided to prevent the intrusion of the mixture from the gap between the transport plates. Therefore, even when two mixture transport devices are arranged, The concentration of coarse aggregate in the center can be reduced to the utmost. Further, in the composite material transporting device according to the present invention, the composite material is transported by placing it on a plurality of transport plates. Picking is also prevented. Therefore, on the pavement surface after leveling, the occurrence of uneven stones and unevenness due to the separation of aggregates is reduced, and the homogeneity of the mixture density in the direction across the pavement surface is improved. One of the most important items that determines the overall performance is the improvement in finishability.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of an asphalt finisher as a pavement machine equipped with a mixture transport device configured according to the present invention.

FIG. 2 is a perspective view of the mixture transport device shown in FIG.

FIG. 3 is a side view of a main part of the mixture transport device shown in FIG. 2;

FIG. 4 is a side view of a main part showing another embodiment of the transport plate constituting the composite material transport device shown in FIG. 2;

FIG. 5 is a sectional view of a main part of the mixture transporting device shown in FIG. 2;

FIG. 6 is a cross-sectional view of a principal part showing another embodiment of the mixture transporting device configured according to the present invention.

[Explanation of symbols]

 2: Airframe 3: Mixing material 4: Hopper 5: Mixing material transfer device 6: Conveyor screw 7: Screed device 8: Engine 9: Worker seat 10: Cover member 11: Power transmission mechanism 41: Mixing material feed amount adjustment gate 51: drive shaft 52: driven shaft 53: drive sprocket 54: driven wheel 55: chain 56: transport plate 57: chain guide plate

Claims (6)

[Claims] An apparatus for transporting a mixture accommodated in a hopper arranged at a front part of a machine body to a front side of a screed device arranged at a rear part of the machine body. A drive shaft and a driven shaft disposed in parallel at intervals, a drive sprocket mounted on the drive shaft, a driven wheel mounted on the driven shaft, and wound around the drive sprocket and the driven wheel. And a plurality of transport plates mounted continuously on the chain, and a mixture transport device for a paving machine. 2. The material transport of a pavement machine according to claim 1, wherein the width of the transport plate is set to a size corresponding to a distance between pins connecting the link plates constituting the chain. apparatus. 3. The apparatus according to claim 1, wherein a chain guide plate is provided between the driving sprocket and the driven wheel, below a chain portion passing above the chain. 4. The apparatus according to claim 1, wherein the conveying plate has overlapping portions at both ends thereof, and both end portions of the adjacent conveying plates overlap each other. 5. The apparatus according to claim 1, wherein both ends of the conveying plate in the width direction are attached to the pair of chains. 6. The apparatus according to claim 1, wherein the transport plate is attached to a single chain at a central portion in a width direction.