JPH093821A - Finisher - Google Patents

Abstract

PURPOSE: To pave both a lower layer and an upper layer at the same time by installing a lower layer construction screed and an upper layer construction screed to a chassis so that they may be independent from each other. CONSTITUTION: A lower layer construction screed 4a is mounted on a frame of track links 9 by way of a leveling arm 4d. An upper layer construction screed 4b is mounted on a chassis 1 and a rib 8 rigidly connected to the chassis 1 by way of a leveling arm 3b. A very consistency concrete material (RCC) supplied to a hopper 2 is distributed to a front stage screw 6a and a rear stage screw 6b respectively by means of a lower layer construction feeder 7a and an upper layer construction feeder 7b. After the RCC material spreads to both sides from the central part of the chassis 1, the concrete is consolidated with the screed 4a so that the lower layer may be paved. At the same time, after the RCC material spreads from both ends of the chassis 1 to the inside, the concrete is consolidated with the screed 4b so that the upper layer may be paved.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an RCC (Roller Compa
cted Concrete: A finisher that is applied when paving railway tracks by laying cted concrete on a roadbed.

[0002]

2. Description of the Related Art FIG. 2 is an explanatory view of a conventional finisher used when paving a road by laying an asphalt mixture on a roadbed. In the figure, the finisher includes a hopper 2 for containing and storing the asphalt mixture, a feeder for transferring the asphalt mixture (paving material) in the hopper 2, a screw 6 for spreading the asphalt mixture sent by the feeder to the left and a right, and a screw 6. A tamper that spreads and spreads the spread asphalt mixture, a screed 4 that spreads it evenly, and the like is a floating type that is attached to the tip of a leveling arm 3 that is vertically swingably provided on the traveling vehicle body 1. The leveling arm 3 has its base end supported by the vehicle body 1 and extends rearward of the vehicle body 1, and is attached with the screed 4 suspended from the swinging tip portion. A certain amount of surface pressure is applied to the material to spread it.

[0003]

In the conventional finisher as described above, when paving a railroad track using RCC material, a thickness of about 25 cm is required. However, using the conventional finisher, RCC material is required. When laying and hardening, the construction thickness is limited to about 15 cm, and in order to obtain the required strength and accuracy as a railroad track, it is necessary to divide it into upper and lower layers. Therefore, the time required for paving is doubled, and the supply of materials and transportation by other working machines cannot be accessed from one direction. In addition, the finisher dedicated to concrete has a large tampering noise, and cannot be used in terms of noise and vibration for track construction performed near a private house at night.

[0004]

SUMMARY OF THE INVENTION A finisher according to the present invention is intended to solve the above-mentioned problems, and includes a screed for constructing a lower layer portion suspended from a vehicle body via a first bearing arm, and the lower layer portion. A screed for construction of an upper layer, which is located behind the screed for construction and suspended by a second bearing arm on the vehicle body, and a means for supplying and leveling paving material to each of the screeds. It is characterized by the structure provided.

The finisher according to the present invention includes a screed for construction of a lower layer portion suspended from the vehicle body through a first bearing arm, and the screed for construction of the lower layer portion located behind the screed for construction of the lower layer portion. A screed for upper layer construction suspended via a second bearing arm, and means for supplying and leveling a paving material to each of the screeds, and the central portion of the screed for upper layer construction is The construction is characterized in that the pavement material is projected from the lower side and is supplied from both sides to the screed for constructing the upper layer portion.

[0006]

That is, in the finisher according to the present invention, the screed for construction of the lower layer is suspended from the vehicle body via the first bearing arm, and the screed for construction of the upper layer from the vehicle body is constructed via the second bearing arm. The screed is positioned behind the screed for construction of the lower layer and is suspended so that the paving material is supplied to each screed and leveled, and the screed for construction of the lower layer and the construction of the upper layer are constructed on the vehicle body. The screeds are provided independently of each other, and the pavement material is supplied to the screeds for constructing the upper and lower layers to be leveled, whereby the pavement of the lower layer and the pavement of the upper layer are simultaneously performed.

Further, in the finisher according to the present invention, the screed for constructing the lower layer is suspended from the vehicle body via the first bearing arm, and the central portion of the vehicle body is lowered downward from the vehicle body via the second bearing arm. The projecting screed for construction of the upper layer is positioned behind the screed for construction of the lower layer and suspended, and paving material is supplied to each screed and leveled, and to the screed for construction of the upper layer from both sides. Pavement material is supplied, and a screed for construction of the lower layer and a screed for construction of the upper layer are provided independently of each other on the vehicle body, and the screed for construction of the upper and lower layers is supplied with the pavement material and leveled. As a result, the lower layer pavement and the upper layer pavement are simultaneously performed. Further, since the central portion of the screed for constructing the upper layer projects downward and the pavement material is supplied to the screed for constructing the upper layer from both sides, a groove can be easily created during paving of the upper layer.

[0008]

1 is an explanatory view of a finisher according to an embodiment of the present invention. In the figure, the finisher according to the present embodiment is used for laying an RCC (Roller Compacted Concrete) material on a roadbed to pave a railway track, for example, for lower layer construction and upper layer construction. By installing the two screeds 4a and 4b for partial construction on the vehicle body 1 in a suspended state, the roadbed is paved to a predetermined thickness by running in only one direction without folding back, and a groove for installing sleepers at the time of construction. Is also created. That is, as shown in the figure, the screed 4a is attached to the frame portion of the crawler belt 9 via the leveling arm 3a in the lower layer construction portion of the finisher, and the screed cylinder 5a for adjusting the surface pressure is attached therebetween. . A screed 4b is attached to the vehicle body 1 and a rib 8 rigidly connected to the vehicle body 1 via a leveling arm 3b in the upper layer construction portion, and a screed cylinder 5b for adjusting the surface pressure is attached therebetween. The feeder of this finisher is composed of three rows, the feeder 7a for lower layer construction is provided in the center of the vehicle body 1, and the feeder 7b for upper layer construction is provided on both sides of the feeder 7a for lower layer construction.
In addition, the screw that spreads the paving material is two screws 6
The front stage screw 6a rotates so as to spread the RCC material from the center of the vehicle body 1 to both sides, and the rear stage screw 6b rotates so as to spread the RCC material from both sides of the vehicle body 1 to the center. Screed 4b for the upper portion construction is divided into three so as to be able to create a groove for sleepers installed at time of construction, the center of the screed 4b ₁ is lower by a predetermined height. Reference numeral 4b ₂ in the figure denotes screeds at both ends, and 10 denotes wheels.

The RCC material supplied to the hopper 2 is a feeder 7a for lower layer construction and a feeder 7 for upper layer construction.
It is distributed to the front and rear screws 6a and 6b by b. The front-stage screw 6a rotates so as to spread the RCC material from the center to both ends of the railroad track, and the rear-stage screw 6b rotates so as to spread from both ends to the center, so that the RCC material is uniformly supplied in the width direction in each of the upper and lower layers. Then, the screeds 4a and 4b for constructing the lower layer portion and the upper layer portion are independently compacted from this RCC material, and a groove for installing sleepers is also created at the time of constructing the upper layer portion. That is, in the pavement of the lower layer portion, the RCC material sent from the center of the hopper 2 is spread from the center of the vehicle body 1 to both sides by the front stage screw 6a, and then compacted by the screed 4a for construction of the lower layer portion. Further, in the pavement of the upper layer portion, the RCC material fed from both ends of the hopper 2 is spread inward from both ends of the vehicle body 1 by the rear stage screws 6b, and then compacted by the screed 4b for constructing the upper layer portion. Further, the pressure of the screed cylinders 5a, 5b is adjusted by adjusting the pressure of the screed cylinders 5a, 5b during paving so that the surface pressure of the screeds 4a, 4b is adjusted via the leveling arms 3a, 3b. In addition, in order to construct the groove for installing the sleepers, after the RCC material is spread inward from both ends of the vehicle body 1, the screed 4b for constructing the upper layer is divided into three, and the screed 4b at the center is provided low.
_1. Compact while making a groove. The RCC material supplied to the hopper 2 is distributed by the feeder 7a for construction of the lower layer and the feeder 7b for construction of the upper layer to the pre- and post-stage screws 6a, 6b in an amount necessary for construction of the upper and lower layers.

When paving a railroad track using RCC materials, a thickness of about 25 cm is required. However, when laying and hardening RCC materials using a conventional finisher, the construction thickness is about 15 cm. In order to obtain the required strength and accuracy as a railroad track, it is necessary to construct it by dividing it into upper and lower two layers. Therefore, the time required for paving is doubled, and the supply of materials and transportation by other working machines cannot be accessed from one direction. The dedicated finisher for concrete has a large tampering noise and cannot be used in terms of noise, vibration, etc. for track construction etc. that is performed near a private house at night, but with this finisher, the screed of the conventional finisher is used. Two screeds 4a and 4b for lower layer construction and upper layer construction are made using the same screed, and are attached to the vehicle body 1 in a suspended state via the leveling arms 3a and 3b, so that the screed can be constructed once. The screed 4b for construction of the upper layer is divided into three parts so that the groove for installing sleepers can be created at the same time as paving the roadbed to a predetermined thickness, and the screed 4b ₁ at the center is the screed 4b at both ends. and a predetermined height than ₂ low and two screed 4a, R that 4b is supplied from the hopper 2 as independently perform compaction CC
The feeders 7a, 7b, 7b are arranged in three rows so that the material can be distributed and supplied to the screed 4a for constructing the lower layer of the preceding stage and the screed 4b for constructing the upper layer of the latter stage, and the RCC from the feeders 7a, 7b is used. The directions to spread the material are opposite 2
The RCC material is evenly distributed in the width direction by the one front-stage screw 6a and the rear-stage screw 6b, and the upper and lower layers can be paved by the single construction by the two screeds 4a and 4b for constructing the lower layer and the upper layer. Moreover, since the screed 4b for constructing the upper layer is divided into three, a groove for installing sleepers can be constructed at the same time.

[0011]

The finisher according to the present invention is constructed as described above, and the pavement of the lower layer portion and the pavement of the upper layer portion are performed at the same time, so that the pavement of the upper and lower layers is completed by one-time construction.

[Brief description of drawings]

FIG. 1 (a) is a front view of a finisher according to an embodiment of the present invention, and FIG. 1 (b) is B- in FIG. 1 (a).
A sectional view taken in the direction of the arrow B, (c) is a front view of a screed for constructing an upper layer thereof.

FIG. 2 is a front view of a conventional finisher.

[Explanation of symbols]

1 vehicle body 2 hopper 3a leveling arm for lower layer construction 3b leveling arm for upper layer construction 4a screed for lower layer construction 4b screed for upper layer construction 4b ₁ sleeper groove construction screed 4b ₂ upper layer both ends construction Screed 5a Screed cylinder for lower layer construction 5b Screed cylinder for upper layer construction 6a Pre-stage screw 6b Rear stage screw 7a Feeder for lower layer construction 7b Feeder for upper layer construction 8 Rib 9 Tracks 10 Wheels

Claims (2)

[Claims] 1. A screed for constructing a lower layer portion suspended from a vehicle body via a first bearing arm, and a second bearing arm located behind the screed for constructing the lower layer portion on the vehicle body. A finisher comprising: screeds for constructing an upper layer suspended via the above-mentioned screeds; and means for supplying and leveling a paving material to each of the screeds. 2. The pavement material is supplied from both sides to the screed for constructing the upper layer portion while the central portion of the screed for constructing the upper layer portion projects downward. Finisher.