JP3222829B2 - Matting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leveling machine such as an asphalt finisher for leveling paving materials such as asphalt mixture.

[0002]

2. Description of the Related Art A flattening machine shown in FIG. 7 has been proposed (Japanese Patent Publication No. 9-505370). This leveling machine includes a front running hopper 82 and a rear hopper 83 for accommodating a paving material and a paving material Ha such as asphalt mixture sent from a front hopper 82 by a feeder (not shown) to a self-propelled vehicle 81. Spreading screw 8 to spread left and right
5, a rear spreading screw 87 for spreading the paving material Hb sent from the rear hopper 83 by the feeder 86 to the left and right, and a front spreading device for spreading the paving material Ha spread by the front spreading screw 85. 88 and a rear spreading device 89 for spreading the paving material Hb spread by the rear spreading screw 87 on the road surface. The front spreading device 88 is supported by a member 90 extending rearward below the feeder 86, and the rear spreading device 89 is attached to a self-propelled vehicle 81 by a pivot 91 so as to be rotatable up and down. It is suspended on a pair of left and right leveling arms 92 (only the front side is shown in FIG. 7).

According to the leveling machine described above, two types of paving materials Ha and Hb can be piled up and down at the same time and spread on the road surface in one paving operation.

[0004]

However, the front leveling device 88 is supported by a member 90 separately from the rear leveling device 89 suspended by the leveling arms 92, 92. The upper layer paving material Hb spread by the rear spreading device 89 on the paving material Ha spread by the device 88
However, there is a problem that the pavement thickness cannot be accurately controlled.

[0005] It is an object of the present invention to provide a leveling machine capable of accurately controlling the pavement thickness of an upper-layer pavement material spread by a rear-side spreading device.

[0006]

According to a first aspect of the present invention, there is provided a motor vehicle in which a first hopper and a second hopper accommodating a pavement material and a first hopper are provided. A front spreading screw for spreading the supplied pavement material to the left and right, a rear spreading screw for spreading the pavement material supplied from the second hopper to the left and right, and a pavement material spread by the front spreading screw. In a leveling machine equipped with a front leveling device and a rear leveling device for spreading the paving material spread by the rear spreading screw, the front leveling device and the rear leveling device are used. ,
A pair of left and right leveling arms attached to the self-propelled vehicle so as to be rotatable up and down by a pivot are shifted from each other back and forth and are respectively suspended vertically up and down.

In the above means, the front spreading device and the rear spreading device move up and down around the pivot of the leveling arm in tandem with each other while maintaining a predetermined height difference, and spread the paving material. Level. The pavement thickness of the upper layer pavement material spread by the rear-side spreading device is adjusted by changing the height difference between the front-side spreading device and the rear-side spreading device relatively up and down.

[0008] In the above leveling machine, it is preferable that at least one of the front leveling device and the rear leveling device is configured to be able to expand and contract left and right (claim 2). In this configuration, the paving width is adjusted by expanding and contracting the spreading device. In the case of a leveling device that is not made to be stretchable, the pavement width is changed by attaching and detaching an auxiliary screed and the like.

[0009] The second hopper may be provided with a pavement material drop port disposed above the rear spreading screw. With this configuration, the pavement material can be dropped from the second hopper by its own weight and supplied to the rear spreading screw.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a self-propelled vehicle, to which a front hopper 2 for accommodating the paving material Ha, a rear hopper 3 for accommodating the paving material Hb, and a bar feeder 4 sent from the front hopper 2. A front spreading screw 5 for spreading the paving material Ha left and right, a rear spreading screw 7 for spreading the paving material Hb discharged from the rear hopper 3 right and left, and a front spreading screw 5.
A front side spreading device 8 for spreading the paving material Ha spread by
Paving material Hb spread by rear spreading screw 7
And a loading feeder 16 for loading the paving material supplied from the dump truck T into the receiving hopper 17 into the front hopper 2 and the rear hopper 3. The self-propelled vehicle 1 has a pair of right and left crawlers 11 and 12 and runs by driving them.

The front spreading device 8 includes a pair of left and right frames 2.
Each arm 21a (FIG. 3) of FIG. 1 (FIGS. 3 and 5) is rotatable up and down on a pair of left and right leveling arms 14 on a support shaft 23 in a vertical plane in the traveling direction (front-back direction) of the self-propelled vehicle 1. And the front part of each frame 21 is connected to the leveling arms 14, 14 by a turnbuckle 24, respectively, and intermediate parts before and after the leveling arms 14, 14, more specifically, the front spreading screw 5 and the rear spread screw 5. It is suspended between dengue screws 7. As is well known, each leveling arm 14 is pivotally mounted on a pivot 27 which is moved up and down by an up-and-down cylinder 26 (FIG. 3) provided on the vehicle 1. As shown in FIG. It is rotatable up and down in the plane.

The left and right frames 21 and 21 are vertically and vertically inclinable by a connecting shaft 29 (FIG. 5) in a substantially vertical plane in the right and left direction perpendicular to the traveling direction of the vehicle 1. In addition, the upper part of the distance
(FIG. 5). The spacing adjusting mechanism 30 adjusts the inclination angle of the frames 21 and 21 having the connecting shaft 29 as the apex by changing the spacing between the upper portions of the frames 21 and 21. An extendable turnbuckle in which a nut member 30c is screwed to 30a, 30b is used.

Each frame 21 has a fixed guide member 32
(FIG. 5) are provided substantially horizontally so as to be shifted from each other back and forth, and each fixed guide member 32 is provided with a movable guide member 34 having a screed 33 attached to a lower end thereof by shifting the positions of the screeds 33 and 33 back and forth. Each is inserted. Each movable guide member 34 is fixed guide member 32
The pavement is movable in the left and right directions with respect to the pavement width, and is expanded and contracted to the left and right by the telescopic cylinder 36 to change the pavement width. Each fixed guide member 32 includes a pair of left and right vertical mechanisms 37.
Are attached to each frame 21 so as to be adjustable up and down.

Each of the up-and-down mechanisms 37 is formed by screwing a screw rod 37a attached to the fixed guide member 32 into a rotation nut 37b rotatably attached to the frame 21.
A sprocket 38 is fixed to each of the rotation nuts 37b. When one of the rotation nuts 37b is rotated, the other rotation nut 37b is rotated via an interlocking chain 39 wound around the sprockets 38, 38, and the fixed guide member is rotated. 32 moves up and down together with the movable guide member 34 and the screed 33. The basic structure is the same, except that the left and right frames 21, the two guide members 32, 34, etc. are symmetrical only.

On the other hand, the rear spreading device 9 supports the front portions of the pair of right and left frames 41 (FIGS. 3 and 4) so as to be rotatable up and down on the support shaft 23 in the front-rear vertical plane. At the same time, it is connected to the frame 21 of the front spreading device 8 by a connecting shaft 43 (FIGS. 3 and 6) at the same position as the support shaft 23, and the upper part of each frame 41 is leveled by a turnbuckle 44. And is suspended behind the rear spreading screw 7 while being connected to the rear ends of the respective screws. The other structure is basically the same as that of the front spreading device 8, and the screeds 53, 53 provided at different positions in front and rear are expanded and contracted to change the pavement width and to change the inclination angle of the screeds 53, 53. Each screed 53 can be moved up and down with respect to the frame 41.

The frames 21 and 41 of the front spreading device 8 and the rear spreading device 9 are connected to each other by a support shaft 23 and a connecting shaft 43, so that the front spreading device 8 and the rear spreading device 9 are connected to each other. 9 screeds 33, 33, 53, 53, the upper and lower crown rotations about the connecting shaft 29 are interlocked with each other,
Either the front spreading device 8 or the rear spreading device 9 (generally, for the front spreading device 8), the interval adjusting mechanism 30 can be omitted to simplify the structure and operation. Further, a structure may be employed in which the vertical mechanism 37 is operated by a motor 66 (FIG. 5) supported by the frames 21 and 41 via a transmission mechanism such as a chain. In the case of the leveling machine shown in which both the front leveling device 8 and the rear leveling device 9 are provided with the gap adjusting mechanism 30, the connecting shaft 43 may be omitted.

The rear hopper 3 is provided on the self-propelled vehicle 1 with the pavement material dropping port 3a (FIG. 3) disposed above the rear spreading screw 7, and the pavement material is moved from the dropping port 3a by its own weight. It falls on the side spreading screw 7. In addition, each spreading screw 5, 7
Drive motors 61 and 62 (FIG. 3) for rotating them are connected to each other via transmission means 63 and 64 such as chains. Each spreading screw 5, 7 is supported by the vehicle 1.

Reference numeral 21b in FIG. 3 denotes a roll prevention pin provided on the arm 21a, which is inserted into the long hole 14a of the leveling arm 14 to prevent the front spreader 8 from rolling.

Next, the operation of the flattening machine having the above configuration will be described. Paving work of paving materials such as asphalt mixture,
While the self-propelled vehicle 1 is moving forward, for example, a normal paving material Ha of the front hopper 2 is sent by the bar feeder 4 to the front of the front spreading screw 5, and the spreading screw 5 is moved.
The screed 33 of the front spreading device 8
33, and at the same time, the expensive pavement material Hb having excellent wear resistance, for example, is spread laterally by rotating the rear spreading screw 7 of the rear hopper 3, and the screeds 53, 53 of the rear flattening device 9 are spread. And spread it on the paving material Ha. At this time, the paving thickness of the paving material Hb is constant because the two flattening devices 8 and 9 move up and down around the pivot 27 and do not change the height difference therebetween.

As described above, the supply of the paving material Hb to the rear spreading screw 7 is performed by the drop port 3 a of the rear hopper 3.
, The pavement material Hb is simply dropped by gravity. Therefore, a feeder is not required, the structure is simplified, and the operating cost can be reduced.

In the above-mentioned pavement work, when changing the pavement thickness of the pavement material Hb, two pairs (a total of four) of the up-and-down mechanisms 37 are used.
To move the front spreading device 8 up and down with respect to the rear spreading device 9 or the up and down mechanism of the rear spreading device 9 (as described above,
By moving the rear leveling device 9 up and down with respect to the front leveling device 8 by the same structure as the vertical mechanism 37, the two leveling devices 8,
The height difference between the screeds 33 and 53 is adjusted. In this case, it is possible to change the pavement thickness of the paving material Hb by moving one leveling device upward and the other leveling device downward, or by changing the amount of vertical movement of the two leveling devices 8 and 9. The pavement thickness of the pavement material Hb can also be changed. The pavement thickness of the pavement material Ha is
As in the conventional case, the attack angle of the spreading device is changed and changed.

When changing the pavement width of the pavement material, the screeds 33, 33, 53, 53 of the two flattening devices 8, 9 are expanded and contracted by a telescopic cylinder. The adjustment of the crown angle of the pavement is performed by changing the inclination angle of the screed by the interval adjusting mechanism.

The present invention can be variously modified as follows in addition to the configuration shown in the drawings. (1) Either one or both of the leveling devices 8 and 9 have a structure that cannot be expanded or contracted. In this case, the pavement width is changed by attaching and detaching the auxiliary screed to and from the leveling device. (2) The front screed 53 of the rear spreader 9 is a fixed screed integrally formed with each frame 41, and a pair of left and right telescopic screeds 53 is provided behind each frame 4.
1 to make the screed 53 extendable and contractible in the width direction. (3) The pavement material Hb of the rear hopper 3 is transferred to the rear spreading screw 7 by a bar feeder in the same manner as the front hopper 2. (4) The two types of pavement materials Ha and Hb are spread in contact in the left-right direction without overlapping vertically. In this configuration, the two-sided flooring device 8,
9 is the same height and the paving materials Ha and Hb are spread and leveled. (5) The up-and-down mechanism 37 is vertically adjustable by a turn buckle, and the pair of turn buckles are connected to each other by a chain and a sprocket.

[0024]

As described above, in the flattening machine according to the first aspect, the first hopper and the second hopper accommodating the pavement material and the pavement material supplied from the first hopper are provided in the self-propelled vehicle. Front spreading screw that spreads left and right, a rear spreading screw that spreads the paving material supplied from the second hopper left and right, and a front spreading device that spreads the paving material spread by the front spreading screw. And a rear leveling device equipped with a rear leveling device for spreading the paving material spread by the rear spreading screw, wherein the front leveling device and the rear leveling device are mounted on the self-propelled vehicle. A pair of left and right leveling arms that are pivotally mounted on the left and right pivots are shifted from each other back and forth, and are suspended vertically so that they can be adjusted vertically. Dress With the screed screed and the rear ShikiHitoshi device swings up and down fulcrum axis of leveling arm with a predetermined height difference. Therefore, the pavement thickness of the pavement material in the upper layer can be controlled with high accuracy, and good pavement can be performed.

In the above leveling machine, when at least one of the front leveling apparatus and the rear leveling apparatus is made expandable and contractable to the left and right, the pavement width can be easily adjusted. Further, if the second hopper has a structure in which the dropping hole of the pavement material is provided above the rear spreading screw, there is no need to attach a feeder to the second hopper, and the structure becomes simpler. , Driving costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of the leveling machine of FIG. 1;

FIG. 3 is a side view showing a relationship between a front flattening device and a rear flattening device.

FIG. 4 is a plan view of the same.

FIG. 5 is a cross-sectional view of the front side spreading device.

FIG. 6 is a cross-sectional view showing a coupling structure between frames of a front side spreading device and a rear side spreading device.

FIG. 7 is a side view of a conventional leveling machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Self-propelled vehicle 2 Front hopper (1st hopper) 3 Rear hopper (2nd hopper) 3a Drop port 5 Front spreading screw 7 Rear spreading screw 8 Front leveling device 9 Rear leveling device 14 Leveling arm 21 Frame 27 Axis 33 Screed 36 Cylinder for telescopic movement 37 Vertical mechanism 41 Frame 53 Screed Ha, Hb Paving material

Continued on the front page (73) Patent holder 000201515 Maeda Road Co., Ltd. 1-13-1 Osaki, Shinagawa-ku, Tokyo (73) Patent holder 000003931 Niigata Ironworks Co., Ltd. 1-1-10 Kamata Honcho, Ota-ku, Tokyo (72) Inventor Hideyasu An An Obayashi Road, 1-24-1 Minami-Aoyama, Minato-ku, Tokyo (72) Inventor Tatsuoki Inagaki 2-9-3, Shiba Park, Minato-ku, Tokyo Inside Tokyu Industrial Co., Ltd. (72) Inventor Sou Sugata 3-13-1 Kyobashi, Chuo-ku, Tokyo Taisei Rotec Co., Ltd. (72) Inventor Chiaki Matsuura 3-13-1 Kyobashi, Chuo-ku Tokyo, In Taisei Rotec Co., Ltd. (72) Inventor Katsuo Hasebe 7-3-7 Roppongi, Minato-ku, Tokyo Toa Road Industry Co., Ltd. (72) Inventor Ryuji Izawa 7-3-7 Roppongi, Minato-ku, Tokyo Toa Road Industry Co., Ltd. (72) Inventor Akio Mori Tokyo (14) Inventor Nobuyuki Watanabe 3-14 Kamiosaki, Shinagawa-ku, Tokyo 12 Inside Maeda Road Co., Ltd. Niigata Iron Works Co., Ltd. Takasaki Factory (56) References Japanese Utility Model Sho 61-89006 (JP, U) Japanese Utility Model Hei 2-29908 (JP, U) Japanese Utility Model Hei 4-77607 (JP, U) Registered utility model 3028816 ( JP, U) Jikken 46-7601 (JP, Y1) Table 9-505370 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01C 19/48

Claims (3)

(57) [Claims] A first hopper and a second hopper for accommodating pavement material, a front spreading screw for expanding a pavement material supplied from the first hopper left and right, and a supply from the second hopper. A rear spreading screw that spreads the paving material left and right, and a front spreading device that spreads the paving material spread by the front spreading screw,
A flattening machine equipped with a rear spreading device for spreading the paving material spread by the rear spreading screw, wherein the front spreading device and the rear spreading device are pivotally mounted on the self-propelled vehicle. A leveling machine characterized in that it is suspended on a pair of left and right leveling arms, which are rotatably mounted up and down so as to be shifted back and forth, and can be adjusted up and down relatively. 2. The flattening machine according to claim 1, wherein at least one of the front flattening device and the rear flattening device can be expanded and contracted right and left. 3. The leveling machine according to claim 1, wherein the second hopper is provided with a pavement material dropping port disposed above the rear spreading screw.