JP3169101B2 - Front cover mechanism for road scraping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front cover mechanism of a device for scraping a road surface such as an asphalt pavement for regeneration or other purposes supported by a traveling means such as a vehicle.

[0002]

2. Description of the Related Art As is well known, a road surface scraping device scrapes a road surface with a cutter drum provided with a cutter bit and is mounted in a machine frame. 2. Description of the Related Art A conveyor device that carries waste material is connected, and the waste material is transferred to the conveyor device by the rotational force of a cutter drum, and is discharged to a traveling truck or the like.

In a road surface scraping apparatus, a front cover, a rear cover, and a side cover for preventing scattering of waste materials to the outside are arranged between the machine frame and the road surface to prevent the waste materials from scattering outside the device. Preventing. In particular, since it is a device that scrapes off the road surface as it progresses, the rear cover slides the scraping plate on the scraping surface to scrape off the waste material so that the waste material does not remain at that location. There are also things.

[0004] As a front cover of such a road surface scraping device, for example, the applicant of the present invention has previously disclosed a real open flat 2-1294.
There is a front cover mechanism of a road scraping device disclosed in Japanese Patent Publication No. In the front cover mechanism according to the present invention, the front cover is attached to the machine frame so as to be openable and closable, and an opening and closing means (a wire rope in the embodiment) for opening and closing the front cover is connected to the front cover. By opening and closing the front cover, the waste material placed in front of the apparatus is smoothly accommodated in the apparatus.

[0005]

However, since the front cover of the conventional road scraping device is fixed to the front side of the machine frame, the road surface before scraping is not flat to some extent. In the case, the front cover cannot follow the change in the height of the road surface, and when changing from a high position to a low position, waste material remains on the road surface, and when changing from a low position to a high position, There is a gap between the cover and the road surface, and there is a problem that scattering and remaining of the waste material cannot be prevented.

When the front cover is appropriately raised by the opening / closing means, it is possible to cope with a change in the height of the road surface to some extent. However, any known technique such as a wire rope and a hydraulic cylinder is applied as the opening / closing means. However, some manual operation is required, the work is troublesome, and the work efficiency is reduced. The present invention can solve the above-mentioned problem, and its object is to appropriately follow the height of a road surface to be scraped and to provide a front cover mechanism of a road surface scraping device that prevents scattering of waste material after scraping. To provide.

[0007]

According to the present invention, the front cover mechanism of the road scraping device according to the present invention has the following features.
A front cover for rotatably supporting a cutter drum provided with a cutter bit for scraping the road surface on the outer peripheral surface to the machine frame, supporting the machine frame on traveling means, and further slidingly contacting the road surface to prevent scattering of waste material. A road surface scraping device disposed between a road surface and a front side of the machine frame, wherein a front end of an arm in a front-rear direction is pivotally supported by a horizontal axis at a front side of the machine frame, and It is characterized in that the front cover is attached to an end.

[0008] According to the second aspect, the first aspect is the first aspect.
, A frame is attached to a front side of the machine frame so as to be movable in a vertical direction, and the horizontal axis is attached to the frame. A frame is attached to the front side of the machine frame movably in the vertical direction, and the arm is supported by the frame.

[0009] The third aspect of the present invention is the second aspect of the present invention.
Wherein the rear end of a conveyor for carrying out scraped scraps is supported by the frame.

[0010]

According to the front cover mechanism of the road surface scraping device of the present invention, according to the first aspect, the front cover is attached to the rear end of the arm pivotally supporting the front end on the front side of the machine frame. Pivots vertically at its front end. As a result, when the position of the road surface before scraping becomes high, the front cover pushed up on the road surface turns the arm upward, and conversely, when the position becomes low, the arm turns downward by its own weight, so the front cover Is always in an appropriate sliding contact with the road surface regardless of the height of the road surface before scraping, and the scraped scrap material does not scatter outside. In addition, the front end of the arm in the front-rear direction is pivotally supported on the front side of the machine frame, so that the front cover is pulled by the arm as the traveling vehicle advances, and the arm can easily turn following the road surface. At the same time, the front cover surely comes into sliding contact with the road surface.

According to the second aspect of the present invention, the frame supporting the arm is movable in the vertical direction, and when the position of the road surface before scraping is increased, the frame is pushed up by the road surface and the frame is pushed up. When it moves upward and conversely, its position becomes lower, it moves downward due to its own weight of the frame and the arm. This prevents the force from concentrating on the front end of the arm when the arm is turned upward, and allows the arm itself to move in the vertical direction, so that the front cover follows the road surface more appropriately. I do.

According to the third aspect of the present invention, since the rear end of the conveyor is supported by the vertically movable frame, the conveyor itself can be moved vertically, and the road surface can be scraped. It is possible to always maintain the optimum height of the rear end of the conveyor with respect to the depth, and to improve the transfer efficiency of the waste material due to the rotating force of the cutter drum.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show an embodiment of a front cover mechanism of a road scraping device according to the present invention. In these drawings, a front view of the road scraping device 1 is shown in FIG. 1 and a top view is shown in FIG. Show.

The road surface scraping device 1 rotatably supports a cutter drum 3 on a machine frame 2, and has a number of cutter bits 4 protruding from an outer peripheral surface of the cutter drum 3. Is connected to a rotary drive source (not shown) so that the cutter bit 4 scrapes the road surface 5 by the rotation of the cutter drum 3. The machine frame 2 is suspended by a traveling vehicle so as to be able to move up and down by a suspension device (not shown) such as a hydraulic cylinder, and moves along the road surface 5. Side covers (not shown) are mounted on the left and right sides of the machine frame 2 so as to be able to ascend and descend so as to shield between the road surface 5 and the inside and outside, respectively. Similarly, a scraping plate (not shown) is attached to the front cover 6 made of the same, and also to the rear side. The scraping plate is generally made of a metal plate, and is attached to the lower rear end of the machine casing 2.

The device 1 for scraping a road surface is well known for the above-described configuration. In this embodiment, the device 1 for scraping a road surface is provided, in particular, on the front side of a machine frame 2 so as to be in contact with a road surface. The front cover 10 that shields the inside and outside and the conveyor device 20 that carries out scraped scraps are configured to be movable in the vertical direction. That is, the fixed frame 11, which is individually fixed by bolts and nuts so as to extend forward from the machine frame 2 on the left and right sides from the center in the width direction on the front side of the machine frame 2, has a vertically long slot. 12 are formed, and each fixed frame 1 is
A shaft 13 is supported over one space.
Is movable in the vertical direction along the elongated hole 12. A moving frame 14 supported by the shaft 13 is provided inside each fixed frame 11.

The moving frame 14 is a moving frame 1
The shaft 13 is inserted through a through hole formed in the shaft 4 and is prevented from falling off by a pin or a key. Note that when the moving frame 14 is at the movement limit position in the downward direction, it is assumed that the lower end is a position separated from the road surface 5 by a predetermined distance.

A horizontal shaft 15 is attached to the outer surface of each moving frame 14 so as to extend horizontally from the moving frame 14 to the left and right sides. The horizontal shaft 15 has a disk-shaped flange portion 15 at one end.
a is fixed, and a plate 15b for reinforcing the fixing
Are fixed to the horizontal shaft 15 and the flange portion 15a in a cross shape.
The horizontal shaft 15 is attached by being connected to 5a with a bolt.

The left and right horizontal axes 15 are
An arm 16 is attached so as to be able to pivot vertically. The arm 16 has two bent portions and two support portions 16a arranged in parallel with each other, and a cylindrical portion which is individually fixed to one end of each of the support portions 16a and can be fitted to the horizontal shaft 15. 16b and a first plate portion 16c parallel to the horizontal axis 15 and fixed across the other end of the support portion 16a.
A first reinforcing portion 16d fixed to a bent portion of the support portion 16a in parallel with the horizontal axis 15, and a cylindrical portion 16b, a first reinforcing portion 16d and a first reinforcing portion inside and parallel to the support portion 16a. A second reinforcing portion 16e fixed parallel to each other between the reinforcing portion 16d and the first plate portion 16c, and a second reinforcing portion 16e between the cylindrical portion 16b, the first reinforcing portion 16d, and each support portion 16a. And a second plate portion 16f fixed to the upper side of the first plate.

Further, after the cylindrical portion 16b is fitted to the horizontal shaft 15, a stopper 17 is provided at a position between the cylindrical portions 16b.
Is arranged. The stopper 17 is connected to the second plate 16
The lower part of the arm 16 is in contact with the lower surface to prevent the arm 16 from turning downward at a predetermined position. The cylindrical part 17a is fixed to the horizontal shaft 15 by bolts, and the predetermined position is freely set by loosening the bolts. You can do it. On the other end of the horizontal shaft 15, that is, on the end surface on which the flange portion 15 a is not provided, an end plate 18 that prevents the arm 16 from moving parallel to the outside of the cylindrical portion 16 b is fixedly provided by bolts. .

On the other hand, a plate-shaped front cover 10 is attached to the first plate portion 16c of the arm 16 by bolts and nuts. One surface of the front cover 10 is opposed to the outer peripheral surface of the cutter drum 3, and the lower end of the front cover 10 needs to be disposed at a position where it contacts the road surface 5. The stopper 17 is appropriately set so that the lower end of the front cover 10 is in contact with the road surface 5 even when the vehicle is at the lower turning limit. The front cover 10 may be a flexible material such as a rubber material or a rigid material such as a metal material as long as the front cover 10 has appropriate strength to prevent scattering of waste materials. The material is not limited.

Further, between the moving frames 14, a rear end of the conveyor device 20 is arranged. It is assumed that the rear end of the conveyor device 20 is located at a position where the waste material jumped up in the machine frame 2 is transferred, so that the rear end faces the machine frame 2. Further, the conveyor device 20 includes:
It extends forward, and its front end faces above the loading platform of a dump truck or the like running forward. The rear ends of the main frames 20a on both sides thereof are supported by each moving frame 14, and the shaft 13 and the moving frame 14 It moves up and down simultaneously with the movement.

A plow (guard) is provided below the conveyor device 20 and over the front sides of both moving frames 14.
19 is attached with bolts and nuts. This plow 19 is to prevent the obstacle from colliding with the conveyor device 20 when there is an obstacle ahead of the road surface scraping device 1 in the traveling direction. In FIGS. 1 and 2, bolts and nuts for connecting the members are not shown to avoid obscuring the drawings.

Next, the operation of the road surface scraping apparatus 1 having the above configuration will be described. In FIG. 3, a road scraping device 1 is suspended by a traveling vehicle 21, and a dump truck 22 loaded with waste material on the road surface scraped by the road scraping device 1 in front of the traveling vehicle 21 runs at the same speed. I have. The traveling vehicle 21 is provided with a conveyor device 23 that is continuous with the conveyor device 20, and the loading platform of the dump truck 22 faces below the distal end thereof. Behind the traveling vehicle 21, a sweeper 24 is running, and cleans and stores the powdery and granular waste material remaining on the scraping surface 5a scraped by the road scraping device 1. This sweeper 24
When the granular waste material becomes full, it moves to the road surface 5 in front of the traveling vehicle 21 and discards the waste material. Reference numeral 5b denotes the discarded powdery and granular waste material.

While the road surface 5 is scraped off by the cutter drum 3 of the road surface scraping device 1, the traveling vehicle 21
When the vehicle reaches the position of the granular waste material 5b during the forward movement in the direction of the arrow X, the front cover 10, which has initially slidably contacted the road surface 5, slides the arm 16 from the road surface 5 to the granular waste material 5b constantly.
Swings upward, thereby following a change in height from the road surface 5 to the granular waste material 5b.

In this case, the movement of the entire front cover mechanism differs depending on the material forming the front cover 10. That is, when the front cover 10 is made of a material having high rigidity such as a metal material, a force is smoothly transmitted from the front cover 10 to the arm 16 with respect to a change in the position from the road surface 5 to the granular waste material 5a. The cover 10 includes the road surface 5 and the powdery and granular waste material 5.
The arm 16 is turned upward while slid to a. When the change from the low position to the high position on the road surface 5 is large and the maximum position is higher than the lower end of the moving plate 14, the front cover 10
Pivots the arm 16 upward, and at the same time, the lower ends of the moving plate 14 and the plow 19 move upward while sliding on the road surface 5.

When the front cover 10 is made of a material having low rigidity such as a rubber material, the front cover 10 itself is appropriately bent and deformed to follow a change in the position from the road surface 5 to the granular waste material 5a, The arm 16 does not pivot or pivots slightly. When the highest position of the road surface 5 is higher than the lower end of the moving plate 14, the lower ends of the moving plate 14 and the plow 19 move upward while sliding on the road surface 5 while the front cover 10 slides on the road surface 5. As described above, when the height change of the road surface 5 is large, the moving cover 14 moves upward while sliding on the road surface 5 to prevent the force from being concentrated on the arm 16.

As the moving plate 14 moves upward, the rear end of the conveyor device 20 disposed between the moving plates 14 also moves upward. The conveyor device 20 includes:
In order to improve the efficiency with which waste materials scraped off by the cutter drum 3 are transferred, it is ideal that the rear end is located as low as possible, but in fact, the maximum of the road surface 5 by the cutter drum 3 It must be located above the scraping depth. Therefore, the conveyor device 20
Is supported by the moving plate 14 which moves in the vertical direction according to the height position of the road surface 5, so that the rear end of the conveyor device 20 always has an optimum height with respect to the maximum scraping depth of the road surface 5. I have.

Further, as the traveling vehicle 21 advances, when the position of the particulate waste material 5a changes from the road surface 5 to the road surface 5, that is, from the high position to the low position, the front cover 10 slides on the powder and granular waste material 5a and the road surface 5. Meanwhile, the arm 16 turns downward by its own weight. At this time, if the lowermost position of the road surface 5 is known in advance and the downward turning of the arm 16 is prevented at the predetermined position by the stopper 17, the front cover 10 may be slid on the road surface 5 without any difficulty. Absent. Also, plow 19
And when the moving plate 14 has moved upward,
Similarly, it moves downward by its own weight, and along with the downward movement of the moving plate 14, the rear end of the conveyor device 20 also moves downward.

By the movement of the front cover mechanism,
The road surface scraping device 1 moves with the traveling vehicle 21,
Waste materials are jumped up to the conveyor device 20 by the cutter drum 3. The waste material is loaded on the dump truck 22 via the conveyor devices 20 and 23. Thus, the road surface 5
Is not flat, the front cover 10 is
The arm 16 pivots up and down in a state where it is always in sliding contact with the moving plate 14, and the moving plate 14 moves up and down and
Follows changes in the altitude position. Thus, it is possible to prevent the waste material from being scattered without any manual operation. Further, the rear end of the conveyor device 20 supported by the moving plate 14 also moves in the vertical direction following the change in the height of the road surface 5 and keeps a suitable height. The transfer efficiency of the waste material can be improved.

[0030]

As is apparent from the above description, the following effects can be obtained according to the front cover mechanism of the road scraping device of the present invention. According to the first aspect of the present invention, since the arm to which the front cover is attached follows a change in the height position of the road surface before turning and scraping in the vertical direction, the front cover is mounted on the road surface before scraping. Irrespective of the height position, it is always in sliding contact with the road surface, so that the scraped waste material can be prevented from being scattered to the outside without requiring any manual operation.

According to the second aspect of the present invention, the frame on which the horizontal shaft supporting the arm is mounted follows the change in the vertical position of the road surface before moving up and down and scraping. When turning the arm upward, force is prevented from being concentrated on the front end of the arm, and the arm itself can be moved in the vertical direction, so that the front cover can more suitably follow changes in the height of the road surface. it can.

According to the third aspect of the present invention, since the rear end of the conveyor is supported by the vertically movable frame, the conveyor itself can be moved vertically, and the road surface is scraped. It is possible to always maintain the optimum height of the rear end of the conveyor with respect to the depth, and to improve the transfer efficiency of waste material due to the rotating force of the cutter drum.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a front cover mechanism of a road surface scraping device according to the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is an explanatory diagram illustrating a use state of the road surface scraping device in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road surface loosening apparatus 2 Machine frame 3 Cutter drum 4 Cutter bit 5 Road surface 10 Front cover 14 Moving frame (frame) 15 Horizontal axis 16 Arm 20 Conveyor device 21 Traveling vehicle (traveling means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E01C 23/12 E01C 23/09

Claims (3)

(57) [Claims] 1. A cutter drum provided with a cutter bit for scraping a road surface on an outer peripheral surface thereof is rotatably supported on a machine frame, and the machine frame is supported by a traveling means. In a road surface scraping device in which a front cover to be prevented is disposed between a road surface and the front side of the machine frame, the front end of the arm in the front-rear direction is pivotally supported by a horizontal axis on the front side of the machine frame. A front cover mechanism of a road scraping device, wherein the front cover is attached to a rear end of the arm. 2. A front surface scraping device according to claim 1, wherein a frame is attached to a front side of the machine frame so as to be movable in a vertical direction, and the horizontal shaft is attached to the frame. Cover mechanism. 3. The front cover mechanism of a road surface scraping device according to claim 2, wherein a rear end of a conveyor for carrying the scraped scrap material is supported by the frame.