JP2000202269A - Material feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material feeder which sufficiently improves a refuse sending rate to a plasticizing extruder and prevention of refuse retention in a hopper. SOLUTION: An agitator 15 is arranged in a hopper 1, and the agitator 15 is fitted to a vertical screw 7 freely rotatably installed hung in the hopper 1 so that its moving up and down can be adjusted and turns linked with the rotational actuation of the screw 7, and movement of an agitating arm part 22 of the agitator 15 toward an inclined hopper inner peripheral wall 4 can be adjusted. And the agitating arm part 22 has flexibility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to refuse (eg, garbage, plastic trash, paper trash, etc.) in a heating cylinder.
Is melted and kneaded, and is connected to a garbage inlet of a plasticizing extruder for reducing and solidifying the volume through a front extrusion port and discharging the material, and a material supply device constituting a garbage reducing and solidifying apparatus together with the plasticizing extrusion apparatus. About.

[0002]

2. Description of the Related Art Reuse of garbage is an important issue from the viewpoints of recent environmental problems and resource recycling problems.

Therefore, as a means of reusing garbage, Refuse Derived Fuel (RDF), which reduces garbage into solids and uses it as fuel, has recently attracted attention. Various devices have been provided as devices for achieving this.

[0004] However, this type of apparatus conventionally provided has the following disadvantages. Relied solely on the melt-kneading action of the plasticizing extrusion device consisting of the heating cylinder and the screw provided in the cylinder, it was insufficient to melt-knead the refuse sent from the hopper, and the volume reduction rate was low. Is not good. Some screws are arranged biaxially to increase the volume reduction rate, but such a configuration has led to an increase in cost. In the case of dust having a small specific gravity, feeding from the inside of the hopper to the heating cylinder side was poor.

In order to solve such a problem, the present applicant has provided the following material supply apparatus.

[0006] To explain the outline of the above-mentioned material supply device, this device is provided with an auxiliary screw for kneading dust in a hopper beforehand and feeding it into a heating cylinder of a plasticizing extrusion device in order to improve the volume reduction rate. In order to improve the feeding rate by providing the dust at the position of the discharge port of the hopper and improving the feed rate of the trash into the auxiliary screw, a vertical screw with its tip facing the auxiliary screw is vertically installed in the hopper. Adopted (Japanese Patent Application No. 10-283568)

[0007]

However, even with the material supply apparatus which has solved the problems of the prior art as described above, further improvements have been left.

That is, the hopper for introducing dust is generally formed in a substantially funnel shape having an inclined inner peripheral wall. Under such circumstances, dust having a small specific gravity, such as styrofoam, adheres to the inner wall (inclined wall) of the hopper due to factors such as static electricity and does not bite into the vertical screw. This can occur even if the inner peripheral wall has a vertical inner peripheral wall, but is a problem that tends to occur particularly in the case of an inclined inner peripheral wall.

[0009] In this case, not only the feed rate of the dust to the plasticizing extrusion device side is reduced, but also a situation is considered in which the dust is accumulated in the hopper.

Therefore, the applicant of the present application has focused on the point that the above problem can be solved by increasing the efficiency of dust stirring in the hopper, and made intensive studies.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to improve the rate of sending dust to the plasticizing extrusion device and to prevent dust from staying in the hopper. An object of the present invention is to provide a material supply device that can be sufficiently achieved.

[0012]

Means for Solving the Problems In order to solve the above problems, the technical means of the present invention is to provide a hopper having at least a material input port and a discharge port, and a rotatable rotatable inside the hopper. A vertical screw that feeds the refuse introduced into the hopper to the discharge communication port, and a stirring device that is rotatably disposed in the hopper and stirs the refuse introduced into the hopper. The stirrer is attached to a rotating member vertically suspended in the hopper so as to be able to adjust up and down movement and to adjust back and forth movement.

[0013] The agitating device has a mounting portion mounted on the rotating member so as to be vertically movable, a connecting arm portion mounted on the mounting portion so as to be adjustable in the front-rear direction, and a continuous portion from the connecting arm portion. And a vertically arranged stirring arm.

Further, the stirring arm may have flexibility.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the material supply apparatus of the present invention will be described below with reference to the drawings. The figure shows one embodiment of the material supply device of the present invention, and is not particularly limited, and the configuration may be appropriately changed within the scope of the present invention.

In the figure, 1 is a hopper, 7 is a vertical screw (also called a pushing screw), 15 is a stirrer (also called a bridge prevention member), 8 is a pushing screw motor, and 14 is a material cutting detecting device. Is shown. It should be noted that the plasticizing extruder and other components that constitute the refuse reduction solidifying device together with the material supply device of the present invention are not particularly illustrated, but various configurations are freely combined within the applicable range of the present invention. Used.

Although the overall shape of the hopper 1 is not particularly limited, the hopper 1 is formed in a cylindrical shape (a well-known hopper shape) having at least a material input port 2 and a discharge communication port 3. Vertical screw (push screw)
7 and a stirrer 15 are installed.

The structure of the hopper 1 is not particularly limited, and may have any capacity and shape (for example, the inner peripheral wall 4 having an inclined shape or a straight wall shape).

It is to be noted that components other than the illustrated structure can be freely provided inside and outside the hopper 1. For example, by providing a heater to the outer wall 5 of the hopper to apply heat to the refuse introduced into the hopper 1 and melting the refuse or heating the refuse in the hopper 1 in advance, the efficiency of the melt-kneading operation to be kept down afterwards Is also effective.

In the present embodiment, the hopper 1 is formed in a substantially funnel shape in which the discharge communication port 3 is formed to have a smaller diameter than the input port 2. The inclination of the inner peripheral wall 4 is not particularly limited, and the inclination state can be arbitrarily set within the scope of the present invention. Also, it is within the scope of the present invention whether the inner peripheral wall 4 has a mirror finish or a non-mirror finish.

The vertical screw (push screw) 7 is rotatably suspended in the hopper 1 and has a function of sequentially forcibly sending dust put into the hopper 1 to the discharge connection port 3.

In this embodiment, the screw proximal end 9 is connected to a push screw motor (drive source) 8 provided outside the hopper 1 so as to be rotatable, and the center of the hopper 1 is connected to the discharge communication port 3. It is suspended so that the screw tip 11 faces.

The vertical screw 7 may have any length and diameter of the screw portion 10, and the screw pitch may be uniform throughout or may gradually become narrower or wider toward the tip. There is no limitation. Further, the screw rotation rpm is not limited.

In the illustrated example, the cylinder 6 near the tip 11 of the vertical screw 7 and the discharge connection port 3 of the hopper 1 is made smaller in diameter so that dust to be sent is compressed. The six diameters are not limited.

Further, although not particularly limited,
The vertical screw 7 may be controlled to be rotatable forward and backward. That is, at the time of the forward rotation, the dust in the hopper 1 is forcibly pushed into the discharge communication port 3 sequentially, while at the time of the reverse rotation, the dust around the auxiliary screw 24 to be described later flows back into the hopper 1. This is because when a rotational load is applied to the auxiliary screw 24, the dust loaded around the auxiliary screw 24 is once returned to the hopper 1 by the reverse rotation of the vertical screw 7 so that the rotational load is eliminated (zero). This is a configuration for smooth continuous operation.

The stirrer 15 is rotatably disposed in the hopper 1 and stirs the dust put into the hopper 1, and has an effect of improving the penetration of dust into the vertical screw 7.

The stirrer 15 is attached to a rotating member (rotary shaft) vertically suspended in the hopper 1 so as to be adjustable up and down, and is arranged so as to be adjustable back and forth.

In the present embodiment, a stirrer 15 is provided on the shaft 13 between the upper end 12 of the screw portion 10 of the vertical screw 7 and the base end 9 connected to the motor 8 so as to be able to adjust the vertical movement. I have.

A specific embodiment will be described. The stirrer 15 includes a mounting portion 16 that is mounted on the shaft portion 13 of the vertical screw 7 so as to be vertically movable and adjustable.
6 is provided with an agitating section 20 provided to be adjustable in forward and backward movement.

The stirrer 20 includes, for example, a connecting arm 21 which is attached to the mounting part 16 so as to be able to move back and forth horizontally, and a stirring arm 22 which is continuously suspended from the connecting arm 21. As shown in the figure, it is integrally formed of a steel material in a substantially inverted L-shape in a side view.

The structures of the connecting arm portion 21 and the stirring arm portion 22 are not particularly limited, and the length of the arm portion 22 is not limited.
The stirring arm portion 22 has such a length that the stirring arm portion 22 can contact or approach the inner peripheral wall 4. That is, it is preferable to provide a movable adjustment range in which the stirring arm 22 can come into contact (approach) with the inclined inner peripheral wall 4 over a wide range.

Further, in this embodiment, a description will be given of a case where the side view is formed in a substantially inverted L-shape.
The agitating arm 22 and the agitating arm 22 may be separated from each other and may have a structure in which the agitating arm 22 is pivotally mounted in a vertically swingable manner. In particular, it is preferable to have a durable material in consideration of heat resistance, impact resistance, and the like, in anticipation that various dusts will be introduced. Further, in this embodiment, only one stirring device 15 is provided in one hopper, but a plurality of stirring devices may be provided. Further, in the present embodiment, only one stirring arm is suspended from the connecting arm 21, but it is within the scope of the present invention that a plurality of stirring arms are suspended in the arm length direction.

The mounting portion 16 has a shaft insertion hole 17 through which the shaft portion 13 is inserted, and an arm portion insertion hole 18 through which the connecting arm portion 21 is inserted. 19,
For example, a screw or the like is provided, and by loosening the fixing mechanism 19, the fixing operation to the shaft portion 13 is released to enable vertical movement, and the fixing operation to the connecting arm portion 21 is released to enable the front-rear movement. On the other hand, by tightening each fixing mechanism 19,
The mounting portion 16 can be fixed at a predetermined position in the height direction of the shaft portion 13, and the connecting arm portion 21 is fixed after being moved back and forth by an arbitrary distance.

The overall shape of the mounting portion 16 is not particularly limited, and includes a portion which is mounted to be movable up and down with respect to the shaft portion 3 and a portion which is mounted so that the connecting arm portion 21 can be moved back and forth. Any configuration can be selected as long as the configuration is provided. Further, the fixing mechanism 19 is not limited to the screwing as shown, and other well-known fixing mechanisms can be applied within the scope of the present invention.

In the present embodiment, the vertical movement adjustment and the front-back movement adjustment of the stirring device 15 are of the manual type in which the fixing mechanism 19 is operated as needed, respectively, but these movements are automatically performed at predetermined time intervals. It is also possible to make it perform. The operating mechanism at that time is arbitrary, such as using a cylinder or other vertical operating mechanism (front-back operating mechanism), and a well-known control mechanism is also applied.

In this embodiment, the stirrer 15 is attached to the shaft portion 13 of the vertical screw 7 so as to be able to move up and down with respect to the shaft portion 13. It is also within the scope of the present invention to have a structure in which a rotating shaft is vertically installed and the stirring device 15 is mounted on the rotating shaft.

In this embodiment, the agitator 15 is provided at an upper position, and a second agitator (also referred to as a second bridge preventing member) 23 is provided below the agitator.

The second stirrer 23 comprises a mounting portion 23a and a stirrer 23b similarly to the stirrer 15 described above. The stirring arm 2 is fixed to the screw 7 by a desired means such as a screw, and extends substantially perpendicularly from the tip of the connecting arm 23b 'extending horizontally from the mounting portion 23a.
The stirring arm 23b "is provided in an elongated shape substantially in parallel with the vertical screw 7.

Accordingly, the second stirring device 23 rotates together with the stirring device 15 in accordance with the forward and reverse rotation of the vertical screw 7 to stir the dust in the hopper 1. By the rotation of the second stirring device 23, there is also an advantage that the dust in the hopper 1 can be successfully bitten into the vertical screw 7 and sent to the plasticizing extrusion device side.

The second stirring device 23 is provided with the stirring device 1
Since a desired fixing mechanism is provided similarly to 5, the fixing position can be freely selected and determined in the vertical range of the vertical screw 7.

In this embodiment, the respective stirring devices 15 and 23 are rotated by utilizing the rotation of the vertical screw 7. However, the present invention is not limited to this. It is also possible to rotate each of the agitating devices 15 and 23 within the scope of the present invention.

In this embodiment, an auxiliary screw 24 is provided below the hopper 1 so as to cross the discharge communication port 3 while leaving the front end portion 25 and the rear end portion 26 outside. After kneading, the refuse is fed into the heating cylinder of the plasticizing extrusion apparatus. However, the discharge communication port 3 of the hopper 1 is directly connected to the heating cylinder without passing through such an auxiliary screw 24. Even those are within the scope of the present invention.

The auxiliary screw 24 uses a hydraulic motor or a torque motor as the drive source 27 connected to the rear end 26,
It is preferable that the pressure is always kept constant.
The auxiliary screw 24 is provided within the scope of the present invention.
The screw shape, screw length, screw pitch, blade width, etc., or screw rotation rpm, etc., can also be arbitrarily selected.

The auxiliary screw 24 is configured to be rotatable forward and backward for the following reasons. When the dust in the hopper 1 is fed into the plasticizing and extruding device, the auxiliary screw 24 is rotated forward, and for example, foreign matter mixed in the hopper 1 may bite into the auxiliary screw 24 or plasticize from the hopper 1 (auxiliary screw). If a rotational load is applied to the auxiliary screw 24 due to an excessive amount of dust being fed to the chemical extrusion device, the auxiliary screw 24 may be hindered in continuous operation. did.

This reverse operation is controlled so as to be automatically performed by detecting the rotational load, but it is also within the scope of the present invention that it can be performed manually. The detection of the rotational load state is performed by a known means, for example, a rotary encoder or the like.

It is preferable that the auxiliary screw 24 is controlled so as to alternately repeat the forward / reverse rotation operation every predetermined time so as not to hinder the continuous operation. For example, an example is shown below.

In the case of general urban waste, 133r
After forward rotation for 2 minutes at pm or more, reverse rotation for 3 seconds, further forward rotation for 1 minute, and then reverse rotation for 3 seconds. This is repeated as one cycle.

Thus, the hopper 1 can be operated continuously.
The feed amount of dust from the side to the plasticizing extrusion device side becomes intermittent, and no rotational load is applied to the auxiliary screw 24. still,
The rotation speed of the auxiliary screw 24 and the respective times of normal rotation and reverse rotation can be arbitrarily changed, and the setting of the cycle is not particularly limited.

FIG. 4 shows a main part of an embodiment of the material supply device according to the third aspect, which is a modification of the agitating section 20 in the agitating device 15 described above.

The stirrer 20 of this embodiment is an improvement of the stirrer arm 22.
2a is suspended, and a ball 22b having a desired diameter is integrally attached to the tip of the chain 22a to form the stirring arm 22.

According to the embodiment of the present invention, when dust having a large specific gravity is put into the hopper 1, there is a possibility that the stirring device 15 may stop during the stirring, which may cause trouble. In such a case, it is an object to avoid dust having a large specific gravity and to perform smooth stirring.

That is, when dust having a large specific gravity is put into the hopper 1 and the ball 22b comes into contact with the dust, the hanging chain 22a bends to avoid the dust. Therefore, the stirring device 15 was not subjected to a large load due to the dust and the smooth stirring operation was obtained. The configuration of the suspension chain 22a and the configuration of the balls 22b are not particularly limited, and other configurations can be adopted within the scope of the present invention.

[0053]

As described above, the present invention provides a material supply device capable of sufficiently improving the dust feeding rate to the plasticizing extrusion device and preventing dust from staying in the hopper because of the above-described structure. did it.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a material supply device of the present invention.

FIG. 2 is a plan view of a main part partially cross-sectioned;

FIG. 3 is a side view of an essential part shown in a longitudinal section.

FIG. 4 is a schematic diagram showing a main part in the embodiment of the present invention described in claim 3;

[Explanation of symbols]

 1: Hopper 7: Vertical screw (pushing screw) 15: Stirring device 16: Mounting unit 20: Stirring unit 21: Connecting arm 22: Stirring arm 22a: Hanging chain 22b: Ball 24: Auxiliary screw

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B09B 3/00 301W (72) Inventor Yasuo Murase 1 Kiyohakucho, Kuki-shi, Saitama F-term in Matsuda Manufacturing Co., Ltd. Reference) 3F075 AA10 BA01 CA03 CA04 CA09 CC03 CC04 CC05 DA03 DA04 4D004 AA03 AA07 AA12 BA03 CA15 CA29 CA45 CB16 CB27 CB28 CB42 CB50 4F301 AA15 BA21 BE01 BE18 BF16 BF31 BG16 BG45 4G078 AB20 BA05 DA01

Claims (3)

[Claims] 1. A hopper having at least a material input port and a discharge communication port, and is rotatably suspended in the hopper,
A vertical screw that feeds the dust put into the hopper to the discharge connection port; and a stirrer that is rotatably disposed inside the hopper and stirs the dust thrown into the hopper. A material supply device, which is attached to a rotating member vertically suspended in a hopper so as to be adjustable up and down and back and forth. 2. A mounting part which is mounted on the rotating member so as to be adjustable in vertical movement, a connecting arm which is mounted on the mounting part so as to be adjustable in forward and backward movement, and which is continuously provided from the connecting arm. The material supply device according to claim 1, wherein the stirring device comprises a stirring arm. 3. The material supply device according to claim 2, wherein the stirring arm has flexibility.