JPS6131054Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a telescoping push roller device that is installed at the front of a construction machine such as an asphalt finisher and pushes the rear tire of a vehicle such as a dump truck.

Generally, when performing paving work with an asphalt finisher, if there are obstacles on both sides of the area to be paved, the paving work must be done while avoiding the obstacles, and the overall width of the finisher body must be designed to avoid the obstacles. This results in the minimum pavement width that can be paved. Therefore, in order to enable paving work even in narrow spaces, finishers whose overall width is as small as possible are often used.

By the way, this type of small asphalt finisher has a push roller device fixed to the front part that pushes the rear tires of a dump truck, etc. During paving work, the finisher pushes the dump truck while loading the dump truck. The material is supplied to the hopper at the finisher. However,
As is well known, dump trucks range from large to small, and it is desired that any type of dump truck can be accepted by the push roller device. teeth,
The receiving width of the push roller device must be at least larger than the width (tread) between the left and right rear tires of a large dump truck. For this reason, especially in small asphalt finishers, the receiving width of the push roller device becomes larger than the overall width of the finisher itself, which makes it difficult to keep the overall width down. This results in a reduction in the paving workability and paving ability of the asphalt finisher in narrow spaces.

On the other hand, if the push roller device is kept within the overall width of the finisher in order to reduce the overall width of the finisher, it will be difficult to accept the left and right rear tires of a large dump truck. If it deviates from the surface, it not only damages the tires but also prevents the composite material from being received smoothly, causing problems in paving work.

This invention was made in view of the above points. In other words, this invention makes it possible to make the push roller expandable and retractable so that the minimum width of the push roller can be made smaller than the overall width of the construction machine, thereby suppressing overhang. To provide a telescoping push roller device capable of reliably receiving rear tires of other types of vehicles.

Therefore, in order to achieve this object, the telescoping push roller device of the present invention is a telescoping push roller device that is located at the left and right positions on the front side of the construction machine in the running direction and pushes the rear tires of the vehicle. A support rail fixed to the machine, an engagement member that is engaged with the support rail and can be slid in the left and right directions of the construction machine and can be fixed at any position, and an engagement member that is rotatable on the engagement member. The construction machine is characterized by having a push roller attached to the vehicle to receive the rear tire of the vehicle and push the rear tire as the construction machine travels.

This invention will be explained below with reference to an illustrated embodiment.

Figure 1 shows an asphalt finisher 1 equipped with a telescoping push roller device according to this invention.
FIG. 2 is an enlarged view of the front part of the asphalt finisher 1, and FIGS. 3 and 4 are perspective views of the front part of the asphalt finisher 1. This asphalt finisher 1 has a hopper 2 at the front into which the asphalt mixture AM is charged, and the input mixture AM is sent to the screed 4 at the rear by the mixture feeders 3 in the hopper 2. It's starting to become easier. The hopper 2 has left and right wings 6, 7 that can be lifted freely by lift cylinders 5, 5 in the direction of the arrows in FIGS. 3 and 4, that is, in the left and right directions orthogonal to the running direction. The lateral width D of the hopper 2 is larger than the width d of the body 1a and the chassis frame 8. Furthermore, a left push roller device 9 and a right push roller device 10 are provided at the front end of the chassis frame 8, and are telescopically symmetrical in structure.

The left and right push roller devices 9, 10 are as follows:
Since they have a bilaterally symmetrical structure as described above, the structures of the left and right push roller devices 9 and 10 will be explained using the left push roller device 9 shown in FIGS. 5 and 6 as an example. The left push roller device 9 is engaged with a support rail 11 having a transverse T-shaped cross section fixed to the chassis frame 8, and a C-shaped cross section, and is engaged with the support rail 11 and moves the asphalt finisher 1 along the support rail 11. an engaging member 12 that is slidable in the left-right direction; and a push roller 13 that is rotatably attached via brackets 12a, 12a attached to the front surface of the engaging member 12 to receive and push the rear tires of the dump truck. and fixing bolts 14, 14 for fixing the engaging member 12 to an arbitrary position on the support rail 11.

As shown in FIG. 6, the axial length L of the push roller 13 is set to be at least larger than the width l of the rear double tires BT of a large dump car. When the push rollers 13, 13 of the left and right push roller devices 9, 10 are slid inwardly as shown in FIG. 7, they can receive the left and right rear double tires ST, ST of the smallest dump truck. At the same time, when it is slid to the outermost position, it can accept the left and right rear tires BT, BT of the largest dump truck.

Note that when the push rollers 13, 13 are located at the outermost position, the maximum width M ₁ between the outer ends of these push rollers 13, 13 is as shown in FIG.
is larger than the left-right width D of the hopper 2 in the unlifted state, and in the innermost position, the minimum width M ₂ between the outer ends of the hopper 2 is larger than the width D of the hopper 2 in the unlifted state, as shown in FIG. It is smaller than the horizontal width D of 2. Further, when the left and right wings 6, 7 of the hopper 2 are lifted, as shown in FIG. It's summery.

Next, the operation of the above configuration will be explained.

First, to explain the case where the mixed material AM is supplied by a large dump truck, as shown in FIGS. 5, 8, and 9, the engaging members 12, 12 of the left and right push roller devices 9, 10 are After positioning the left and right rear wheel double tires BT, BT of the large dump truck and the left and right push rollers 13, 13 by extending and sliding them in the left and right outward directions, tighten the fixing bolts 14, 14 to remove the push roller 13. , 13 slides are fixed. Then, a large dump truck is positioned in front of the asphalt finisher 1, and the left and right rear wheels have double tires BT.
The BT is received by push rollers 13, 13, and the driving force of the asphalt finisher 1 pushes the large dump truck to move forward, and the mixed material AM is supplied into the hopper 2 from the large dump truck. The supplied composite material AM is sent to the screed 4 by the composite material feeders 3, 3, and is paved on the ground.

At this time, the left and right rear wheel double tires BT, BT are
Positioned and fixed according to the tires BT, BT,
In addition, since it is reliably accepted by a wide range of push rollers 13, 13, even if it curves during paving construction, it will not fall off from the push rollers 13, 13, and there will be no damage to the tires.
Furthermore, there is no risk of hindrance to the supply of composite material AM to the hopper 2.

On the other hand, to explain the case where the mixed material AM is supplied by a small dump truck, as shown in FIGS. After deflating and sliding, position the small dump truck's left and right rear double tires ST, ST so that they match the left and right push rollers 13, 13, and then tighten the fixing bolts 14, 14 to fix the slides of the push rollers 13, 13. . Then, as in the case of the large dump truck described above, the small dump truck is positioned in front of the asphalt finisher 1, the left and right rear double tires ST, ST are received by push rollers 13, 13, and the small dump truck is dumped by the driving force of the asphalt finisher 1. While pushing the dump truck forward, the hopper 2 is supplied with composite material AM from a small dump truck.

Furthermore, as shown in FIG. 10, if the paving construction site is in a corner or narrow place where there are obstacles such as walls, lift the right or left wings 7, 6 of the hopper 2 and move the left and right push rollers. If the push rollers 13, 13 are slid inward and fixed, there is no possibility that the push rollers 13, 13 will hit an obstacle and not be able to pave every corner. Therefore, even in this case, as in Fig. 7, the left and right rear wheels of the small dump truck have double tires ST,
By receiving and pushing the ST into the push rollers 13, 13, the composite material AM can be smoothly supplied and paving can be carried out to every corner.

In addition, if the distance between the left and right rear double tires of the dump truck to be used is known in advance, if scales corresponding to the respective distances are provided on the support rails 11, 11, positioning as the push rollers 13, 13 expand and contract becomes easier. It becomes easier. Further, the left and right push roller devices are not limited to the telescopic structure of the above-described embodiment, and various types can be considered, and the present invention can be applied not only to small asphalt finishers but also to other construction machines.

As explained above, according to this invention, an engaging member that can be slid in the left-right direction of the construction machine and can be fixed at any position is attached to the support rail fixed to the front side of the construction machine in the running direction. Since the push roller is rotatably attached to the construction machine, the minimum width of the push roller can be kept smaller than the overall width of the construction machine by expanding and contracting the push roller as appropriate.This eliminates the need for the push roller to protrude sideways from the construction machine. I can do it,
Therefore, it is possible to work in every corner even in narrow spaces, and by expanding and contracting the push roller, it can accept the rear tires of any type of vehicle, so even if the machine turns around a curve while working, the rear tires will not come off. Therefore, compared to the conventional fixed push roller device, there is an effect that the workability and capacity of a construction machine of the type that works while pushing a vehicle can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an asphalt finisher equipped with a telescoping push roller device according to this invention, Fig. 2 is an enlarged view of the front part of the asphalt finisher, and Fig. 3 is an enlarged view of the asphalt finisher. A perspective view showing the front part and showing a state in which the left and right rear tires of the small dump truck are received;
FIG. 4 is a perspective view showing a state in which the left and right rear tires of a large dump truck are received; FIG. 5 is an enlarged perspective view of the left push roller device showing a state in which the left rear tires of a small dump truck are received; 6
The figure is an enlarged perspective view of the left push roller device showing a state in which the left rear tire of a large dump truck is received, FIG. 7 is a plan view showing a state in which the left and right rear tires of a small dump truck are received, and FIG. 9 is a plan view showing a state in which the left and right rear tires of a large dump truck are received, FIG. 9 is an explanatory view showing a state in which a large dump truck is received, and FIG.
The figure is an explanatory diagram when performing pavement construction while avoiding obstacles. 2...Hotsupa, 3...Shashi frame, 9,
10... Left and right push roller devices, 11...
Support rail, 12... Engagement member, 13... Push roller, ST... Double left and right rear tires of a small dump truck, BT... Double left and right rear tires of a large dump truck.

Claims (1)

[Scope of utility model registration request] A telescoping push roller device is located at the left and right positions on the front side of the construction machine in the running direction and pushes the rear tires of the vehicle, and the push roller device is constructed by being engaged with a support rail fixed to the construction machine and being engaged with the support rail. an engaging member that is extendable and expandable to slide in the left and right directions of the machine and can be fixed at any position; A telescoping push roller device comprising a push roller that pushes a rear tire.