JPH0633614B2 - Gravel sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field The present invention is used to improve the land containing gravel, and to separate or utilize the gravel in the earth and sand. The present invention relates to a device that is attached to a type work machine and performs gravel sorting while moving earth and sand from one end of a sieve to the other end.

(Prior art) For example, when improving a wasteland containing gravel to an agricultural land such as an orchard or a ranch, or removing gravel from an agricultural land containing a lot of gravel, conventionally, a relatively small-scale land improvement In the case of, the excavator bucket of the hydraulic excavator is equipped with a bucket having a separating device such as a sieve, etc., but a large debris removal device is used to improve vast land. . As this debris removing device, for example, a tubular rotary sieve is used. This tubular rotary sieve has a structure in which a wire mesh or the like is formed in a tubular shape and is rotated, and earth and sand containing gravel are introduced into the tubular rotary sieve, and the earth and sand fall downward from between the wire mesh and the like. Then, the gravel is separated from the gravel by dropping or removing it from the rear of the sieve.

However, in this conventional tubular rotary sieve, when performing gravel separation, in order to move the earth and sand backward, it is necessary to lift the front portion of the tubular rotary sieve and perform the work in an inclined posture, For example, when carrying out the work by attaching the tubular rotary sieve to a work machine such as a hydraulic excavator, the position of the earth and sand introducing hopper attached to the front part of the tubular rotary sieve becomes high, and the discharge position of the bucket becomes high. Therefore, there is a problem that work efficiency becomes poor. Also, in order to lower the soil discharging position by the bucket, it is sufficient to install a conveyor for introducing sand that can lower the front end, but if a conveyor is installed, the device will be large and heavy, and the device price will be high. However, it is expensive.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, an object of the present invention is to provide a gravel sorting apparatus which can be made small and lightweight and can perform gravel sorting work efficiently.

(Means for Solving Problems) In order to achieve this object, the present invention is an apparatus attached to a self-propelled working machine and performing gravel sorting while moving from one end of a sieve of earth and sand to the other end. , Two or more rotating bodies are installed on each of the left and right side frames of the fixed frame, and the receiving portion provided on the side frame of the movable sieve is eccentrically rotated with respect to the rotating body or the combined body attached to the rotating body. The movable sieve is freely and eccentrically aligned with respect to all the rotating bodies, and is coupled to the side frame of the fixed frame by rotating at least one of the rotating bodies at a speed of 5 c / min to 30 c / min. Install a motor to move the upper sediment,
An oscillating device for vibrating the screen in a cycle shorter than the rotation of the rotating body is mounted on the movable screen, and a vibration absorbing member is provided in a device for transmitting the rotational force of the motor to the movable screen. .

(Operation) The motor rotates the rotating body at the above speed to make a circular motion on the sieve, thereby sending the sediment on the sieve and simultaneously vibrating the sediment on the sieve to increase the separation efficiency of the gravel and to move it. The vibrating device mounted on the screen further vibrates the screen at a frequency higher than that of the motor to further improve the separation efficiency of the screen. The vibration absorbing member prevents the vibration of the screen caused by the vibration generator or the like from being transmitted to the motor side.

(Embodiment) FIGS. 1 to 4 show an embodiment of the gravel sorting apparatus according to the present invention, in which 1 is a rectangular solid frame and 2 is the fixed frame 1.
It is a movable sieve in the form of a slightly smaller rectangle, and has a screening body 2c such as a wire mesh and a grid through which earth and sand can pass and gravel cannot pass.

The left and right side frames 1a and 1b of the fixed frame 1 have two left and right sides, respectively.
One or more (two in the illustrated example) rotating bodies 3 are attached. Each rotating body 3 of the present embodiment has a disk shape, and as shown in FIG. 2, a shaft 6 is rotatably mounted through a bearing 5 in holes 4 formed in the left and right side frames 1a and 1b of the fixed frame 1. The center of the rotating body 3 is fixed to the inner end of the shaft 6 so that the rotating body 3 does not rotate.
A rod-shaped coupling body 7 is planted in each of the rotating bodies 3 at a position eccentric from the center of rotation, and a rubber disc 9 for impact absorption is fitted to the coupling body 7 via a bush 8 to form a rubber disc. 9 for movable sieve 2
Are rotatably fitted in the circular holes 12 provided in the left and right side frames 2a, 2b via the bearing 10. Further, as shown in FIG. 3, the eccentric direction of the combined body 7 with respect to the shaft 6 of the rotating body 3 (the shaft 6
All angles formed by the lines connecting the coupling body 7 and the coupling body 7 with respect to the horizontal line and the like are the same, and the distances between the shaft 6 and the coupling body 7 are all the same length.

Since at least one of the rotating bodies 3 is used as a driving rotating body, as shown in FIGS. 1 and 2, a hydraulic pressure is applied to one fixed frame side frame 1a of the rotating body 3 via a mounting base 14. Alternatively, the electric motor 15 is provided, and the sprocket 16 fitted to the output shaft of the motor 15 and the sprocket chain 17 fitted to the shaft 6 of the rotating body 3 are hooked with the sprocket chain 17, and the motor 15 is driven to rotate the rotating body 3. It is configured to rotate.

According to this configuration, when the motor 15 is rotated in the direction of the arrow a in FIG. 3, the rotating body 3 rotates and the combined body 7 rotates, so that the rubber disk 9 centers the shaft 6 of the rotating body 3. As a result, the side frames 2a and 2b of the movable sieve 2 are moved accordingly, and the other rotating bodies 3 are also moved accordingly, and the movable sieve 2 vibrates. Due to this vibration, the soil is sorted while moving in the direction indicated by the arrow b.

FIG. 4 is a diagram for explaining the movement of the sediment accompanying this vibration. As shown in FIG. 4A, when the movable sieve 2 moves obliquely upward as shown by the arrow d, the sediment 19 including the gravel 18 is Sorting body 2
It is moved relative to c as indicated by arrow b while being pressed relatively as indicated by arrow e. Next, as shown in (B), when the movable sieve 2 moves as indicated by the arrow f, the earth and sand 19 relatively floats as indicated by the arrow g, during which the sorting body 2c moves in the h direction ( Since it moves in the direction opposite to b), the earth and sand 19 will move in the direction of arrow b with respect to the sorting body 2c in any case. This movable sieve 2
The vibration frequency of the motor 15 is preferably about 5 c / min to 30 c / min.

As described above, the vibration of the movable sieve 2 by the motor 15 not only causes the movement of the earth and sand 19 but also vibrates the earth and sand 19 to enhance the gravel separation effect, but further improves the gravel separation efficiency. A cycle much shorter than the vibration cycle of the movable sieve 2 by the motor 15 (vibration frequency is 1 c / sec ~
It is preferably about 5 c / sec. ), An oscillating device 20 for vibrating the movable frame 2 is provided. The vibration device 20 is
An electric or hydraulic motor 21 is installed on a side frame 2b of the movable sieve 2 via a base 24, eccentric weights 22 and 23 are provided in the vicinity thereof, and a grooved belt is provided between toothed wheel bodies 25 and 26 provided at the ends thereof. Two
The eccentric weights 22 and 23 are linked so as to face in the same direction by applying 7, and a belt 29 is also applied between one wheel 25 and the output wheel 28 of the motor 21 for driving. . If a gear is used instead of the power transmission belt 27 between the eccentric weights 22 and 23, the rotation directions of the eccentric weights 22 and 23 are reversed, so that vibrations only in the vertical direction can be obtained. By arranging 23 in the vertical direction, horizontal vibration can be obtained.

5 and 6 are side views showing a state in which the gravel sorting apparatus B of the above embodiment is attached to the hydraulic excavator A. The present invention can also be used in a stationary or traveling type debris-dedicated machine in the case where the excavator and the debris machine are separately configured. However, the debris machine of this embodiment is a hydraulic excavator A. By attaching the gravel sorting device B to one side frame 31 in a detachable manner (attaching the weight 34 to the other side frame), it is possible to perform excavation and gravel separation by one operator. The hydraulic excavator A can be used as an original excavator if the gravel sorting device B is removed.

The structure of the gravel sorting apparatus B will be described. Two front and rear mounting beams 32 and 33 are detachably mounted by bolts or the like so as to project laterally in the front and rear of the one side frame 31. The gravel sorting apparatus B has a fixed frame 1
The hopper 37 for introducing earth and sand is attached to the front part of the
At the rear end, to carry the separated gravel to a truck,
If necessary, a gravel transfer conveyor 39 is attached. The gravel transfer conveyor 39 may be mounted sideways as shown in FIG. 6A, or may be operated without mounting the conveyor 39.

In this gravel sorting apparatus B, a fixed frame 1 and a front beam 32 are rotatably connected by a pin 40, a hydraulic cylinder 41 is interposed between a rear beam 33 and the fixed frame 1, and a hydraulic cylinder 41 is provided. By extending, it is possible to incline the rear of the gravel sorting apparatus B so as to be lifted,
The moving speed of earth and sand can be changed according to the inclination angle.

In this way, since the gravel sorting apparatus B has a function of moving the earth and sand by the vibration mechanism of the motor 25, as compared with the case where the front portion is inclined like a cylindrical rotary sieve, In the case of the present invention, the height of the hopper 37 is much lower and the height of the soil discharged by the bucket 42 is lower, so that the work efficiency can be increased. Further, in the case of the present invention, since the work can be performed in a state where the gravel discharge side (rear part) is lifted, the gravel discharge position becomes high and even if the conveyor 39 for transferring gravel to a truck or the like is short, the conveyor 3
Since the upper end of 9 can be made high, the conveyor 39 can be short, which realizes economic efficiency and enables the work to be performed in a narrow space where the truck and the working machine are close to each other.

7 to 9 show another application example of the present invention, in which the center frame 43 of the hydraulic excavator A is provided with a space portion 44 as a tall structure, and the fixed frame 1 and the movable sieve 2 are provided in the space portion 44. It is inserted and attached. According to this embodiment,
When the excavated soil is introduced into the hopper 37 from the bucket 42A (showing a bottom tampering bucket), no turning operation is required, so that the gravel sorting operation can be performed more quickly.

In the above embodiment, the rotating body 3 has a circular shape,
It can have other shapes such as a lever shape. Also,
A structure in which the rotating body 3 is circular and the shaft 6 is mounted at an eccentric position, and the rotating body 3 is rotatably fitted to a circular hole receiving portion provided in the side frames 2a and 2b via a rubber plate or the like can also be adopted. .

(Effects of the Invention) As described above, in the present invention, two or more rotating bodies are installed on each of the left and right side frames of the fixed frame, and the movable body is movable to the rotating body or the combined body attached to the rotating body. The receiving portion provided on the side frame of the sieve is eccentrically and rotatably coupled, and the eccentric directions of all the rotating bodies are aligned and joined, and the side frame of the fixed frame is
Since the motor that rotates at least one of the rotating bodies is installed, it is possible to perform work in an inclined posture in which the rear part of the gravel sorting device is lifted. For example, by mounting the gravel sorting device on a working machine such as a hydraulic excavator. When performing work, the position of the earth and sand introducing portion is lowered, and the position for discharging soil such as a bucket is increased, so that the front operation amount is reduced and the work efficiency is improved. Further, since the work can be performed by raising the gravel discharge position, the gravel transfer conveyor can be downsized and the work can be performed even when the work space including the truck and the like is narrow.

Further, according to the present invention, a conveyor for introducing earth and sand is not necessary, and the vibrating device required in the present invention can be small, so that the device can be made small and lightweight, and can be provided at low cost.

Further, in the present invention, since the vibrating device is provided and the sieve is vibrated at a frequency higher than the frequency of rotation by the motor by the vibrating device, the separation efficiency is further improved as compared with the case of simply rotating the sieve. Further, the vibration absorbing member prevents the vibration of the screen from being transmitted to the motor side, and prevents damage to the drive unit such as the motor.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the gravel sorting apparatus according to the present invention, FIG. 2 is an enlarged sectional view taken along the line EE of FIG. 1, and FIG.
FIG. 4A is a sectional view taken along line F-F of FIG. 4, FIGS. 4A and 4B are explanatory views of the operation of the present invention, and FIG. 5 is a side view of a debris removing machine using the embodiment.
6 is a plan view thereof, FIG. 7 is a side view showing another example of the debris removing machine using the embodiment, FIG. 8 is a plan view thereof, and FIG. 9 is an enlarged rear view thereof.

Claims (1)

[Claims] 1. A device attached to a self-propelled working machine for sorting gravel while moving soil from one end of a sieve to the other end, wherein two or more rotations are provided on each of left and right side frames of a fixed frame. The body is installed, and on the rotating body or the combined body attached to the rotating body,
The receiving part provided on the side frame of the movable sieve is eccentrically and rotatably coupled, and the eccentric directions of all the rotating bodies are matched, and at least one of the rotating bodies is attached to the side frame of the fixed frame by 5c. /
A motor for moving the earth and sand on the movable sieve by rotating at a speed of min to 30 c / min is installed, and the movable sieve is equipped with a vibrating device that vibrates the sieve in a cycle shorter than the rotation of the rotating body. A gravel sorting apparatus characterized in that a vibration absorbing member is provided in a device for transmitting the rotational force of the motor to the movable sieve.