JPH07109705A - Intensive compacter - Google Patents

Abstract

PURPOSE:To obtain a sufficiently compacted pavement in which the upper bed is stuck to the lower bed well, by dividing the thick pavement into two and compacting them separately. CONSTITUTION:A lower bed compacter 5 and an upper bed compactor 6 are disposed back and forth in the working direction and these are connected to each other detachably by a connector 7. The connector has a three-directional rotary degree of freedom but has not a vertical degree of freedom and a front and behind degree of freedom. The load of compacter 5 acts on the compacter 6. The paving material 11 fed to the compacter 5 drops from a feeder 13 and it is compacted by a leveling device 14 to form the lower bed 3 of pavement 2. The feeder conveys the paving material to the upper compacter 6 and the paving material is compacted on the lower bed by an upper bed leveling device 33 to form the upper bed. Both compacters 5, 6 are synchronously operated through the connector 7 and the upper and lower beds are continuously and securely compacted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high compaction construction machine for forming a pavement having a large pavement thickness. For example, the present invention is useful for obtaining reliably compacted thick pavement in roller compaction concrete pavement, roadbed material pavement, and the like.

[0002]

2. Description of the Prior Art Roller compaction In concrete pavement or roadbed material pavement, for example, when attempting to construct a thick pavement of 25 cm or more at one time, even if it is compacted with rollers after paving with a finisher, it will be uniformly compacted to the inside. Is difficult
Even if a TTV (double tamper + vibrator) type compaction device is applied to strengthen compaction, the compaction occurs only near the surface and it is difficult to compact the interior (deep part).

Experience has shown that if the pavement thickness is 15 cm or less, the interior can be compacted almost uniformly. Therefore, in order to solve the above-mentioned difficulties during thick pavement construction,
A method of paving the pavement by dividing it into upper and lower two layers has been conventionally considered.

FIG. 12 shows a case where the lower layer portion 101 and the upper layer portion 102 of the pavement are divided into two portions and sequentially finished by using one finisher 100. The finisher 100 receives the paving material 104 from the dump 103, and the screed 10
The lower layer portion 101 is laid by 5. After laying the lower layer portion 101, the finisher 100 is
The pavement material 104 is received from the dump 103 loaded on the upper part, and the upper layer portion 102 is laid on the lower layer portion 101.

FIG. 13 shows two finishers 100a,
100b is used to form the lower layer portion 101 and the upper layer portion 102 of the pavement.
The case of paving each of them is shown almost continuously. The preceding one finisher 100a receives the paving material 104 from the dump 103a and spreads the lower layer portion 101.
The other subsequent finisher 100b receives the paving material 104 from the dump 103b that has been loaded onto the lower layer portion 101, and spreads the upper layer portion 102 on the lower layer portion 101.

[0006]

According to the method using one finisher 100 shown in FIG. 12, the lower layer portion 10
It takes a considerable time from laying 1 to laying the upper layer portion 102, and during this time, the upper surface of the lower layer portion 101 begins to harden. Therefore, the lower layer portion 101 and the upper layer portion 1
The adhesive strength or adhesiveness of 02 is weakened, resulting in a weak pavement as a whole. Further, when the upper layer portion 102 is constructed, the dump 103 that supplies the pavement material for the upper layer portion is placed on the lower layer portion 101, so the pavement of the lower layer portion 101 may be destroyed by the tire of the dump 103. .

The two finishers 100 shown in FIG.
According to the method of arranging a and 100b in front and back,
Among the problems of the method using the single finisher shown in FIG. 12 described above, the problem that the construction of the lower layer portion 101 and the upper layer portion 102 is performed at a considerable time interval is solved. However, the dump 103b that supplies the paving material 104 to the finisher 100b for the subsequent upper layer portion.
Had to be placed on the lower layer portion 101, and the lower layer portion 101 could be destroyed as in the method of FIG.

An object of the present invention is to provide a high compaction construction machine capable of forming a pavement having a high degree of compaction and a large pavement thickness by dividing the pavement into two layers.

[0009]

A high-compacting construction machine of the present invention sends a pavement material to a lower portion for laying a pavement material to form a lower layer portion of a pavement and a pavement material in a construction direction rearward. A lower layer construction machine having a supply means, and an upper layer part leveling that forms an upper layer part of the pavement by laying the pavement material supplied by the supplying means from the lower layer part construction machine on the lower layer part. And an upper layer construction machine disposed behind the lower layer construction machine in the construction direction.

[0010]

[Operation] The lower layer construction machine and the upper layer construction machine move in the same construction direction. Part of the pavement material supplied to the lower layer construction machine arranged in the front of the construction direction is spread by the lower layer spreader to form the lower layer part of the pavement. The other part is sent to the rear upper layer construction machine by the supply device and laid on the lower layer portion by the upper layer laying device to become the upper layer portion, whereby the pavement is completed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external view showing the entire structure of a high compaction construction machine 1 of one embodiment, and FIG. 2 is a schematic view showing the structure and action. The high compaction construction machine 1 is an apparatus for continuously constructing a pavement body 2 having a large pavement thickness into two layers of a lower layer portion 3 and an upper layer portion 4 to obtain a thick pavement having a high compaction degree.

As shown in FIGS. 1 and 2, the high compaction construction machine 1 includes a lower layer construction machine 5 arranged ahead of the construction direction A and a rear layer construction machine 5 arranged rearward of the construction direction A. It has the upper layer construction machine 6 arranged. Both construction machines 5 and 6 are connected by a detachable connection means 7 and can move in conjunction with the same construction direction A.

As shown in FIGS. 2 to 4, the lower layer construction machine 5
Is a hopper 12 that can run by the front wheels 8 and the rear wheels 9 and stores the pavement material 11 supplied from the dump truck 10.
And a bar feeder 13 as a supply means for conveying the pavement material 11 in the hopper 12 to the rear upper layer construction machine 6, a lower layer flattening device 14, and the like.

The conveying surface of the paving material 11 by the bar feeder 13 is a drag pan 1 in which a plurality of plate materials are arranged in the same plane.
It is composed of 5. The drag pan 15 doubles as the bottom surface of the hopper 12, and is inclined and extended rearward so that the rear end of the upper layer construction machine 6 side is higher. The rear end of the drag pan 15 is the hopper 31 of the upper layer construction machine 6. Is located above.

A drive shaft 16 having a length corresponding to the width of the drag pan 15 is provided at the rear end of the drag pan 15. The drive shaft 16 is connected to a hydraulic motor 1 via a chain 17.
It is interlockingly connected to 8. Sprockets 19, 19 are fixedly mounted on both ends of the drive shaft 16, respectively. Further, an idler shaft 20 having a length corresponding to the width of the drag pan 15 is provided at the front end of the drag pan 15.

Block chains 22 and 22 are respectively wound around the sprockets 19 and 19 provided at both ends of the drive shaft 16 and the idler shaft 20, respectively. A bar 23 is connected between the pair of block chains 22 at a predetermined interval, and when the block chain 22 moves as the drive shaft 16 rotates, each bar 23 slides on the upper surface of the drag pan 15 and moves forward. It is configured to move backward from.

A supply port 24 for the paving material 11 is formed in the drag pan 15. The position of this supply port 24 is
It is next to the exit of the hopper 12 and between the front wheel 8 and the rear wheel 9 of the lower layer construction machine 5. This supply port 24 is used for paving material 11
The gate device 25 is elongated in a direction orthogonal to the transport direction of and is opened and closed by a gate device 25 operated by a driving unit (not shown).

A lower layer laying device 14 is provided between the supply port 24 and the rear wheel 9 to compact the pavement material 11 dropped from the supply port 24.

As shown in FIGS. 1 and 2, the upper layer construction machine 6 can be self-propelled by an endless track (crawler) 30 having a small surface pressure on the pavement surface. A hopper 31 is provided at the front of the upper layer construction machine 6. The hopper 3
1, a rear end portion of the bar feeder 13 is arranged above the bar feeder 1 so that the pavement material 11 can be supplied from the front lower layer construction machine 5. A second bar feeder 32, which is a means for supplying the paving material 11, is horizontally arranged from the bottom of the hopper 31 to the rear of the upper layer construction machine 6.

At the rear end of the upper layer construction machine 6, an upper layer laying device 33 is provided, and the pavement material 11 dropped from the bar feeder 32 is compacted, and the upper layer portion is placed on the lower layer portion 3. 4 are formed.

Next, the connecting means 7 for connecting the lower layer construction machine 5 and the upper layer construction machine 6 will be described. The basic function of the connecting means 7 of this embodiment is to reliably connect both the front and rear construction machines 5 and 6 so that they can be interlocked, and the construction machines 5 and 6 can be relative to each other with a certain degree of freedom. It is to connect them so that they can exercise.

Further, as shown in FIG. 2, in this embodiment, there is a rear wheel 9 of the lower layer construction machine 5 behind the lower layer leveling device 14, and the rear wheel 9 passes over the lower layer section 3. . Therefore, in this embodiment, most of the weight of the rear portion of the lower layer construction machine 5 is borne by the upper layer construction machine 6 instead of the rear wheel 9 by the connecting means 7.

The structure of the connecting means 7 will be described with reference to FIGS. First, at the center of the front end of the frame 40 of the upper layer construction machine 6, the swing bracket 42 is in the horizontal plane via the fixing pin 41 arranged in a substantially vertical direction at a position on the center line CL of the main construction machine 1. It is attached so that it can swing freely. This movement is called rotation (yawing).

A connecting plate 43 is fixed to the center of the swing bracket 42 so as to face horizontally forward. The connecting plate 43 is formed with a circular connecting hole 43a. Also,
At both ends of the swing bracket 42, rollers 44 are rotatably provided in parallel with the longitudinal direction of the bracket 42. The roller 44 is used to push the rear wheel of the dump truck while keeping a certain distance from the dump truck when receiving the paving material from the dump truck.

At the center of the rear end of the frame 50 of the lower layer construction machine 5, a bearing 51 is attached so as to be rotatable about the center line CL. This movement is called rolling. The bearing 51 has a pair of flange portions 52, 52 sandwiching the connecting plate 43. The flange portions 52 are formed with holes 53 having the same shape as the connecting holes 43a of the connecting plate 43. Further, a rear end portion of a hydraulic cylinder 54, which is an operating means, is rotatably connected to one flange portion 52 of the bearing 51. Also, the bearing 51
The other flange portion 52 is provided with a guide plate 55 having a guide hole 55a.

A connecting pin 57 is attached to the lower end of the rod 56 of the hydraulic cylinder 54 in a balanced state below the rod 56. The connecting pin 57 can be inserted into and removed from the guide hole 55a of the guide plate 55 and the holes 53, 53 of the flange portions 52, 52 by driving the hydraulic cylinder 54. Further, if the flange portion 52 of the bearing 51 and the connecting plate 43 inserted between the flange portions 52 are parallel to each other, the flange portion 52 and the connecting plate 43 can be rotatably connected by the connecting pin 57. . The rotational movement of each member around the connecting pin 57 is called pitching.

On the lower surface of the frame 50 of the lower layer construction machine 5, springs 5 as biasing means are provided on both sides of the bearing 51.
8 are provided respectively. One end of each spring 58 is fixed to the frame 50, and the other end is connected to the upper side of the corresponding side surface of the bearing 51. When the connecting pin 57 is pulled out, a force in the rotation direction is applied to the bearing 51 about the center line CL, but the springs 58 maintain the balance of the bearing 51 and set the bearing 51 to the neutral position in the rolling direction. To be done.

At this neutral position, the connecting plate 43 whose position in the yawing direction matches the center line CL is
Flange portion 5 of the bearing 51 set to the neutral position
When inserted between the two 52, the center of the connecting hole 43a of the connecting plate 43 and the hole 53 of the flange 52 are aligned. Therefore, if the hydraulic cylinder 54 is driven here, the connecting pin 57 can be inserted into each hole to connect the connecting plate 43 and the bearing 51.

A pair of arms 60 are swingably attached to a frame (not shown) of the lower layer construction machine 5. The rear wheel 9 of the lower layer construction machine 5 is attached to the tip of each arm 60.
Are provided respectively. On the other hand, the above-mentioned frame 50 of the lower layer construction machine 5 has side plates 61 fixed to both ends thereof. The rear end of the hydraulic cylinder 62 is rotatably connected to the upper end of the side plate 61. The tip of the rod 63 of the hydraulic cylinder 62 is rotatably connected to the arm 60. The hydraulic cylinder 62 is an adjusting means for adjusting the ground pressure of the rear wheel 9, and is connected to a hydraulic circuit configured to change the hydraulic pressure.

Next, the operation of the above configuration will be described. As shown in FIGS. 2, 3, and 4, the pavement material 11 put into the hopper 12 of the lower layer construction machine 5 is the drag pan 1.
5, and is fed backward by the bar 23 of the bar feeder 13 driven by the block chain 22. Depending on the opening / closing status of the gate device 25 or the set width of the supply port 24,
A part of the pavement material 11 falls from the drag pan 15, and the pavement material 11 is compacted by the lower layer part leveling device 14 to become the lower layer part 3 of the pavement 2. The other part of the pavement material 11 is sent to the rear upper layer construction machine 6 by the bar feeder 13.

The pavement material 11 put into the hopper 31 of the upper layer construction machine 6 is conveyed backward by the second bar feeder 32, dropped from the rear end of the upper layer construction machine 6 and supplied onto the lower layer section 3. To be done. Then, it is compacted by the upper layer spreader 33 to form the upper layer portion 4 of the pavement 2.

In the above-described series of operations, the lower layer construction machine 5 and the upper layer construction machine 6 are integrally coupled by the coupling means 7 which does not allow relative movement in the front-back direction and the vertical direction. You can move in the same direction synchronously. However, this connecting means 7 has a degree of freedom in the three directions of pitching, rolling, and yawing indicated by the arrows in FIGS. Even if there is a slight inclination or the construction direction is bent, the above-mentioned synchronized interlocking will not be hindered.

Further, as shown in FIG. 2, in this embodiment, the rear wheel 9 of the lower layer construction machine 5 passes over the lower layer portion 3 laid flat.
However, the aforementioned connecting means 7 transfers the load on the front side to the rear side, and the ground pressure of the rear wheel 9 is kept below a certain value by the relief pressure of the hydraulic cylinder 62 shown in FIG.
It is possible to prevent the rear wheel 9 from applying an excessive load to the lower layer portion 3. As a result, when an excessive ground pressure is applied to the rear wheel 9, the rod 63 of the hydraulic cylinder 62 retracts and no pressure is applied to the lower layer portion 3 on which the rear wheel 9 is placed.

In this way, the pressure of the hydraulic cylinder 62 is set so that the ground contact pressure on the lower layer portion 3 of the rear wheel 9 becomes a certain value or less, and most of the load from the lower layer construction machine 5 side is in the vertical direction. If the rear wheel 9 is added to the side of the upper layer construction machine 6 through the connecting means 7 having no degree of freedom of relative movement, the rear wheel 9 will not be damaged.

Thus, according to the construction machine 1 of this embodiment,
Since the time interval for constructing the lower layer portion 3 and the upper layer portion 4 is short, the adhesion of both layers is good, and it is possible to obtain the pavement body 2 which is reliably compacted and has a large pavement thickness.

FIG. 9 shows another embodiment of the present invention. The present embodiment is different from the above-described one embodiment in that the gate device 25 and the lower layer spreader 14 are behind the rear wheel 9 of the lower layer construction machine 5 and the configuration of the connecting means 70 is different. is there. Other configurations and operations are the same as those in the first embodiment, and the same reference numerals as those in FIG.

10 and 11 show the connecting means 70 of the construction machine 1a of this embodiment shown in FIG. At the center of the rear end of the frame 71 of the lower layer construction machine 5, a connecting device 72 is mounted so that it can be rolled. The coupling device 72 has a pair of flanges 73, 73 facing each other, and a fixing pin 74 is provided between the flanges 73, 73.

The fixing pin 74 is connected to the connecting bracket 75.
One end of is slidably inserted. Connecting bracket 75
Can be yawed in the circumferential direction of the fixed pin 74, and can also be moved in the axial direction of the fixed pin 74. And
The other end of the connecting bracket 75 is connected to the frame 77 of the upper layer construction machine 6 by the connecting pin 76 arranged in the horizontal direction.
Is connected to a bracket 78 provided at the center of the front end of the so as to be freely pitched.

The connecting pin 76 is connected to a rod 79 of a hydraulic cylinder (not shown), which is an operating means, so that the connecting pin 76 can be inserted into and removed from the bracket 78 and the connecting bracket 75 of the frame 77.

The connecting means 70 of this embodiment is used for pitching
In addition to the freedom of rolling and yawing in three directions,
Further, the fixing pin 74 and the connecting bracket 75 are fixed pins 7
Relative movement is also possible in the vertical direction along 5. However, it cannot move relative to the front-back direction.
According to such a configuration of the connecting means 70, the above-mentioned first
Similar to the embodiment, the front and rear construction machines 5 and 6 can move in the same direction synchronously on the construction surface.

[0041]

According to the high compaction construction machine of the present invention, the following effects can be obtained. (B) Since the dump truck that supplies the material to the rear upper layer construction machine does not need to be placed on the pavement surface of the lower layer portion that was executed by the preceding lower layer construction machine, the shape of the top and side surfaces of the pavement surface is distorted. Absent. In order for the dump truck to reach the pavement surface, there is a preceding construction machine on the front side, so that the dump truck can be raised from the side surface of the lower layer portion, but according to the present invention, it is not necessary.

(B) It is not necessary to provide a space for the dump truck to pass laterally. When paving with two separate front and rear construction machines, the material is supplied to the rear construction machine either through the side of the front construction machine or the rear through the side of the rear construction machine. Either, and at least the width of the construction machine plus the width of the dump truck is required.

(C) Since the upper layer can be constructed immediately after the lower layer is laid, the adhesion of the upper and lower layers is improved.

(D) By mechanically connecting the two construction machines for the upper and lower layers, the speeds of the front and rear construction machines can be easily synchronized. Depending on the conditions of the construction site, it is a structure that can be constructed without connecting, so it is easy to work. At the construction start part and the construction end part, the height difference between the construction surface and the non-construction surface is large in many cases, and it is often difficult to mechanically connect the construction surface. It can be freely connected or disconnected according to the usage state.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a lower layer construction machine according to an embodiment of the present invention.

FIG. 4 is a plan view of a lower layer construction machine according to an embodiment of the present invention.

FIG. 5 is a plan view of the connecting means in the embodiment of the present invention.

FIG. 6 is a side view of the connecting means in the embodiment of the present invention.

FIG. 7 is a front view of the connecting means in the embodiment of the present invention.

8 is a cross-sectional view of the connecting means at the center line of FIG.

FIG. 9 is a schematic structural diagram of another embodiment of the present invention.

FIG. 10 is a plan view of a connecting means according to another embodiment of the present invention.

11 is a cross-sectional view of the connecting means taken along the line AA in FIG.

FIG. 12 is a diagram showing an example of conventional compaction construction.

FIG. 13 is a diagram showing another example of the conventional compaction construction.

[Explanation of symbols]

 1,1a High-compacting construction machine 2 Pavement 3 Lower layer 4 Upper layer 5 Lower layer construction machine 6 Upper layer construction machine 7,70 Connecting means 11 Paving material 13 Bar feeder as supply means 14 Lower layer leveling device 33 Top layer leveling device

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshihiko Sasaki 1-3-1 Otemachi, Chiyoda-ku, Tokyo Kanto Regional Construction Bureau (72) Inventor Shuichi Mochimaru 1-3-1 Otemachi, Chiyoda-ku, Tokyo Construction Ministry of Construction Kanto Regional Construction Bureau (72) Hiromichi Kotake 7-1 Hattomichi, Matsudo City, Chiba Prefecture Kanto Regional Construction Bureau Kanto Technical Office (72) Inventor Takemi Inoue 3-32-34 Higashishinagawa, Shinagawa-ku, Japan (72) Inventor Hitoshi Yasumatsu 6-70 Mitsuhashi, Omiya-shi, Saitama Japan Tadoido Stock Company General Engineering Department (72) Koichi Sakata 2-11-20 Tamagawa, Ota-ku, Tokyo Nippon Road Co., Ltd. (72) Inventor Shuichi Kokubun 2-12-36 Numakage, Urawa-shi, Saitama Obayashi Road Co., Ltd. Technical Research Institute (72) Inventor Fumio Goto, 730, Mitsutaka, Gunma-cho, Gunma-gun, Gunma Prefecture, Engineering Department, Construction Machinery Division, Niigata Iron Works Co., Ltd. (72) Inventor Tetsuro Kaku, 730, Gunma-cho, Gunma-gun, Gunma Prefecture, Technology, Construction Machinery Division, Niigata Iron Works Department

Claims (1)

[Claims] 1. A lower layer construction machine comprising a lower layer laying device for laying a pavement material to form a lower layer portion of a pavement and a supply means for feeding the pavement material backward in a construction direction, and the lower layer. A pavement material supplied by the supply means from the part construction machine is laid on the lower layer part to form an upper layer part leveling device that forms an upper layer part of the pavement, and a construction direction of the lower layer part construction machine. A high compaction construction machine consisting of an upper layer construction machine arranged at the rear.