JP2002119918A - Supporting device for vibrating grid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting device for a vibrating grid, in which the life is maintained for a long time and maintenance is easily performed and profitability is excellent. SOLUTION: This supporting device for the vibrating grid is constituted of a body 6 of the grid for performing screening operation by vibration, a grid supporting body 2 being freely rockingly provided on a mechanical base 1 of the vibrating grid and capable of being tilted and fixed and a pair of spring members 10 (10a, 10b), in which one end is fixed to the grid supporting body 2 and the other end is fixed to the body 6 of the grid of the vibrating grid, elastically support the body 6 of the grid and are arranged while mutually keeping an angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a device for supporting a vibrating grid. More specifically, the present invention relates to a support device having an elastic body in a support device for a vibrating grid.

[0002]

2. Description of the Related Art Conventionally, remnants and the like generated by civil engineering and construction work have been recycled and reused as much as possible. However, recently, they have attracted attention as a very important problem from the viewpoint of global environmental protection. For this reason, sieving of residual soil and the like by vibrating or the like, removing foreign matters such as large stones and woods, and recycling and using the remaining soil as improved soil are actively performed, and improvements are repeatedly performed accordingly. .

As an example of an apparatus for producing the improved soil, the present applicant has proposed Japanese Patent Application No. 11-141735 "vibrating grid". The device of the prior application is a vibrating grid, which includes a machine, a grid body that is a body mounted on the machine, and a rubber body interposed between the machine and the grid body, and elastically deforms the grid body. Resilient support means for temporarily supporting, and inclining means for inclining the grid body in the direction of flowing the object to be sieved,
It comprises vibration generating means for applying vibration to the grid main body, and a plurality of bar sieves arranged on the grid main body and arranged along a direction in which the object to be sieved flows.

[0004]

However, the above-mentioned prior application filed by the present applicant is effective to some extent, but cannot be said to be complete. The present invention has been made by improving a part of the prior application and further improving the effect. Rubber is applied to the elastic support means for elastically supporting the grid body of the prior application described above. Although this rubber is effective in absorbing vibration, it has problems in the case where the above-mentioned prior application is operated for a long time, in terms of easy replacement of maintenance parts, or in terms of economy. The present invention has been made to solve the above-mentioned conventional problems, and achieves the following objects.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibrating grid which has a long life and is easily maintained by using easily replaceable parts. Another object of the present invention is to provide a supporting device having a highly economical supporting structure by using a device which can be obtained from a company.

[0006]

According to the present invention, there is provided a supporting apparatus for a vibrating grid, which comprises a grid body which performs a sieving operation by vibration, and a swingably mounted tiltably fixed on a base of the apparatus for the vibrating grid. It is composed of a grid support, and a spring member having one end fixed to the grid support and the other end fixed to the grid main body, and elastically supporting the grid main body. Further, the spring member may be a pair of spring members arranged at an angle to each other. Further, the expansion and contraction force of the spring member may be adjusted. Further, it is preferable that the spring member is a compression spring and is arranged in such a configuration that a load is not applied in the tension direction by the vibration. This arrangement is realized by adjusting the mutual angle of the spring members, the swing angle of the grid support, and the magnitude (amplitude, frequency, etc.) of the vibration.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 show the overall structure of a vibrating grid to which the present invention is applied. FIG. 1 shows the entire structure when a grid support 2 (grid support) is horizontally positioned on a machine 1. FIG. 2 is an overall front view of the case where the grid support 2 is inclined and fixed, and FIG. 3 is an overall side view of the vibrating grid. The structure of the vibrating grid is described in detail in Japanese Patent Application No. 11-141735 filed by the same applicant, but has the following general structure.

In the figure, a grid support 2 is arranged above a machine 1. This grid support 2 is the machine 1
And can be fixed at an arbitrary angular position by being inclined at an angle from gravity. The drive for swinging the grid support 2 is performed by two hydraulic cylinders 3 arranged on both side surfaces between the grid support 2 and the machine base 1.

On the grid support 2, a grid body 6
Is mounted. Further, a grid body 6 of a vibrating grid provided with a hopper 5 at an upper portion is supported via the elastic support mechanism 4. The elastic support mechanism 4 is a buffer mechanism for supporting the grid body 6 so as to be able to move up and down, and is constituted by a pair of springs 10 described later. The pair of springs 10 includes a spring 10a and a spring 10b.

On the other hand, a vibrating device 7 and a motor 8 for driving the vibrating device 7 are arranged on a side surface of a grid body 6 which is a main portion of the vibrating grid. The hopper 5 is mounted on the upper part of the grid body 6 as described above. Although not shown, one-stage or two-stage upper and lower sieves are provided inside the grid body 6.
In the case of the two-stage sieve, the lower-stage sieve is to re-sieve the material to be sieved that has passed through the upper-stage sieve. In the present invention, it does not matter whether the sieve has one stage or two stages.

In the vibrating grid having such a configuration, when the material to be sieved is put into the hopper 5,
The grid body 6 is vibrated vertically by a vibration device 7,
The object to be sieved is sieved in one or more stages. What passed through this sieve falls and is used for reuse as improved soil. Those that do not pass are discharged from the discharge port.

The vibrating grid body 6 is supported by an elastic support mechanism 4. Since the conventional elastic support mechanism 4 is made of rubber as described above, if the inclination angle of the grid body 6 is increased, a load in the torsion direction is applied by a load from above the object to be sieved, and the durability is deteriorated. For this reason, it is necessary to be as vertical as possible,
When the grid support 2 is inclined at a frequently used angle, the rubber is vertical, and when the grid body 6 is horizontal, the rubber of the elastic support mechanism 4 is arranged at an angle. ing.

FIG. 4 shows a vibration device 2 when the eccentric body is a single body.
FIG. 3 is a diagram schematically illustrating a basic configuration of a zero. This basic configuration is known and is applied to a vibrating grid. As the rotation shaft 21 of the vibration device 20 rotates from the motor 8 via the belt, the eccentric body 22 also rotates. The eccentric body 22 has a center of gravity G at an eccentric position S away from the position of the rotation shaft 21.

Since the center of gravity G rotates around the rotation axis 21, the center of gravity G makes a circular motion while being swung by centrifugal force. Rotating shaft 21
Are rotatably supported by the grid body 6 together with the eccentric body 22. Therefore, the screen of the grid body 6 is the eccentric body 2
Vibration is performed by the rotation of No. 2 to perform the sieving operation. Although the position of the rotation shaft 21 is changed by a minute amount by vibration, the belt is not detached from the pulley because it is set within an allowable range.

As another example, the rotating shaft 21 is rotatably supported on the fixed side together with the motor, and the eccentric body is rotatably supported on the grid body 6 in an eccentric state, and only the grid body 6 is vibrated. There are ways. FIG. 5 shows a case in which vibration is applied to the grid body 6 by arranging two eccentric bodies in parallel and rotating them in conjunction with each other. In this case, vibration is generated only in the X direction in the drawing by a balanced vibration generation method.

The two eccentric bodies 7b are symmetrically rotated via the two rotating shafts 7a, and vibration is generated in the X direction by the eccentric load in the same direction. In the case shown in the figure, two eccentric bodies 7b are arranged to face each other along a line Y connecting the motor 8 axis and the rotating shaft 7a. Therefore, when the eccentric body 7b rotates, the eccentric body 7b is perpendicular to the line Y connecting the two axes. Vibration occurs in the direction X.

The generation of the vibration in the direction X perpendicular to the line Y connecting the motor 8 axis and the rotary shaft 7a is effective in preventing the belt from falling off due to the rotational vibration. This is because the deviation of the distance between the axes when vibrating in the X direction can be minimized. The motor 8
Since the base on which the belt is mounted swings, the tension of the belt can be adjusted to an appropriate state by changing the swing position.

Next, the elastic support mechanism 4 of the present invention will be described. As shown in FIGS. 1 and 2, the grid support 2
Is provided with a support fixture 9 for attaching a spring 10, and one end of each of a pair of springs 10 is fixed to the support fixture 9. A pair of respective springs 10a and 10b
Are mounted face to face at an angle, and the other end is attached to the side wall of the grid body 6 by the second support fixture 1.
Attached via 1. This attachment allows the expansion and contraction force of the spring 10 to be adjusted.

This expansion and contraction adjustment is performed by the nut 12.
Therefore, a balanced and optimal expansion / contraction state can be set by individually performing the expansion / contraction force of each of the springs 10a and 10b. Also, the mounting angle of the pair of springs 10 can be adjusted. This can be achieved by preparing several support fixtures 9 and second support fixtures 11 having different angles in advance, and selectively using the optimal one. It is also possible to prepare a fixture that can adjust the angle alone.

Therefore, it is possible to adjust the angle for balancing the loads of the two springs 10a and 10b so as to reduce the application of the force in the pulling direction to one of the springs as described later. By doing so, the spring can be prevented from jumping up. The pair of springs 10 are coil springs of the same shape, and two pairs of springs 10 are attached to both sides of the grid body 6 in total.

When an object to be sieved is put in from the hopper 5 and sieved with vibration, the grid body 6 is vibrated by the operation of the vibrating device 7. The grid body 6 is supported by a pair of springs 10 in an elastically supported state. In the case of a vibration operation by two eccentric bodies, the direction of the force is specified, and the force relationship in this supporting state will be described in detail below using this as an example.

FIGS. 6 and 7 are explanatory views showing the distribution of the load applied to the spring 10 when the object to be sieved is thrown and the vibration is caused in a state where the grid body 6 is inclined. FIG. 6 shows a case where the load is downward in the vibration direction. F
Assuming that 1 is a downward force generated due to vibration and F2 is its own weight, F3 is applied downward to the spring as a combined force. The component force in the tilt direction is F4. If the force in the vibration direction is downward, the spring will always receive a downward compressive force.

FIG. 7 shows a case where the force in the vibration direction is directed upward. F1 is an upward force contrary to the above. Assuming that the own weight is F2, the resultant force F3 is applied in the lateral direction. Therefore, the force generated due to the vibration changes F3 between FIG. 6 and FIG. FIG. 8 shows this more schematically.

That is, when a force is applied to the spring 10 in the lateral direction, the position of the spring 10 changes as shown in FIG. The grid body 6 is vibrated in the X direction by the vibrating device 7 as described above. However, since the grid body 6 is inclined, the spring 10 is not only compressed but also laterally caused by twisting or the like. Force is also applied in the direction. This means that the object to be sifted through the hopper 5 is shifted laterally along the inclined surface while being sieved by vibration.

A force is always applied in the compression direction and the spring 1
When 0 is deformed, even if the position of the spring 10 is shifted laterally, both the springs 10a and 10b only deform in the compression direction. However, when F3 occurs in the lateral direction as shown in FIG. 7, if the position of the spring 10 shifts when the spring 10 is fully extended, a force is applied to the spring 10b in the compression direction.
It is assumed that a force is applied to 0a in the pulling direction. This has been confirmed by simulation calculations.

FIG. 9 shows an example of this calculation. FIG. 9 is an assumed calculation example in the case where the opening angle の of the pair of springs 10 is changed. However, when the opening angle の of the pair of springs 10 is small, it is assumed that the spring 10a receives a pulling force. Is shown. That is, in FIG. 8, (a) and (b)
When the opening angle の of the spring 10 is small,
(B) of 0b shows the load distribution state of the spring 10a. The vertical axis in the figure shows the load applied to the spring, and the horizontal axis shows the inclination angle θ of the grid support 2.

In this figure, when the spring 10a of (b) has a large inclination angle θ of the grid support 2, the load is negative. This means that a tension force is applied to the spring 10a. Similarly, (c) shows the spring 10b, (d) shows the spring 10a, and shows the load distribution state of each spring 10a and spring 10b when the opening angle の of the spring 10 is large. Even if the angle θ increases, neither spring is negative.

Since the result of this calculation varies depending on the setting conditions, a definitive result cannot be presented.
a, The tendency of the load applied to the spring 10b does not change. Depending on the condition setting, it can be assumed that the spring is laterally shifted by the vibration operation of the grid with respect to the spring 10a, and a force in the pulling direction is applied. In each of the two springs 10a and 10b, it is necessary to calculate in advance and set optimal conditions so that the load distribution is balanced.

As described above, it is assumed that a complicated force other than compression is generated in the elastic support mechanism 4 supporting the grid body 6. For this reason, in the case of rubber, the durability is poor and the deterioration is apt to occur. However, since the present invention is a spring, a configuration with sufficient durability is possible even in the above-mentioned assumption, and it can withstand a long operation. In the case of one eccentric body, the vibration is a circular motion as described above, but the vibration in the X direction changes continuously, and it is not necessarily illustrated in a steady state.

However, although the force direction tends to be complicated, the same effect can be expected by setting the vibration in the X direction, which is the most important for the sieving operation, under the optimum setting conditions. Even with one eccentric, the use of a spring is durable in any direction and is economically very effective. As mentioned above, although the embodiment of the present invention has been described with respect to the coil spring, the object of the present invention is not limited to this,
It may be a leaf spring.

[0031]

As described above, in the vibrating grid, the elastic support mechanism is constituted by a pair of springs, so that a long life can be maintained, the maintenance is easy, and the economy is excellent. It became a support configuration.

[Brief description of the drawings]

FIG. 1 is an overall view showing a horizontal state of a vibrating grid to which the present invention is applied.

FIG. 2 is an overall view showing an inclined state of a vibrating grid to which the present invention is applied.

FIG. 3 is an overall side view of a vibrating grid to which the present invention is applied.

FIG. 4 is an explanatory diagram showing a basic configuration of a vibration device having one eccentric body.

FIG. 5 is an explanatory diagram showing a basic configuration of a vibration device having two eccentric bodies.

FIG. 6 is an explanatory diagram showing a load distribution assuming a case where a force is applied in a downward direction of a spring due to vibration of a grid body.

FIG. 7 is an explanatory diagram showing a load distribution assuming a case where a force is applied in an upward direction of a spring due to vibration of a grid body.

FIG. 8 is an explanatory diagram illustrating a state in which a spring is deformed and moved by vibration.

FIG. 9 is a graph showing a calculation example of a load applied to a spring.

[Description of Signs] 1 ... Machine 2 ... Grid Support 3 ... Hydraulic Cylinder 4 ... Elastic Support Mechanism 6 ... Grid Main Body 7,20 ... Vibration Device 8 ... Motor 9 ... Support Fixture 10, 10a, 10b ... Spring

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenichiro Dan Dan 2246, Amakyu, Asahimachi, Takeo-shi, Saga F-term in Nakayama Iron Works Co., Ltd. (Reference) 4D021 AA01 AB03 CA04 DA03 DA05 DA20 EA10

Claims (4)

[Claims] 1. A grid body of a vibrating grid that performs a sieving operation by vibration; a grid support that is swingably provided on a base of the vibrating grid and that can be fixed at an angle; And a spring member fixed at the other end to the grid body and elastically supporting the grid body. 2. The vibrating grid support device according to claim 1, wherein the spring members are arranged at an angle to each other, and one end is attached to the grid support and the other end is attached to the grid body. A support device for a vibrating grid. 3. A supporting device for a vibrating grid according to claim 2, wherein said pair of spring members are configured to be able to adjust a stretching force. 4. The vibrating grid support device according to claim 2, wherein the spring member is a compression spring, and a load is not applied in a tension direction by the vibration. Grid support device.