JPH0687027B2 - Powder and granular material feeder - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to powders or granules such as cereal powders, cereal grains, seasonings, detergents, chemicals, dyes, sand, gravel, cement, ceramic powders, plastic powders, plastic particles (hereinafter referred to as powders). Granules) for supplying a specified amount.

[0002]

2. Description of the Related Art Conventionally, a screw feeder (for example, Japanese Unexamined Patent Publication No. 62-1746) has been used as a device for supplying powder of this type.
17, actual development 61-63535), table feeder (for example, Japanese Patent Publication 51-45862, actual development 61-707).
35), a vibration feeder (for example, JP-A-62-15371).
8), a belt feeder (for example, actual development Sho 62-15222)
8), a device provided with a valve type feeder or the like, or a powdery or granular material feeder for combining these feeders (for example, Japanese Patent Laid-Open No. 62-174617).

However, in the above feeder or feeding device,
Since the range of supply of powder and granules is narrow, it has been difficult to accurately supply a large amount of powder and granules to a small amount of powder and granules. In order to solve this point, the present inventor has provided a belt feeder below the hopper so as to be vertically movable, and the lower end of the hopper continuously regulates the layer thickness of the powder or granular material on the belt, and the lower end of the hopper. There has been proposed a powder and granular material supply device capable of continuously performing rough supply when the distance between the section and the belt is wide, and fine supply when the distance is narrow (Japanese Patent Laid-Open No. 2-159523).

[0004]

The above-mentioned powder and granular material supply device has a wide range of supply amount of the powder and granular material, and in addition, the powder of the set weight is set in a short time without increasing the size of the supply amount device. Has the feature that it can be supplied with high precision. However, this device has a problem that the mechanism for moving the belt feeder up and down and the structure of the lower end of the hopper are complicated, and the supply amount becomes more difficult as the supply target becomes finer powder. The object of the present invention is to accurately supply a large amount of powders to a small amount of powders, without increasing the size of the supply device, and to have a simple mechanism and to easily supply even fine powders. The object of the present invention is to provide a powder and granular material supply device that can be controlled.

[0005]

According to the present invention, as shown in FIG. 1, a granular material storage hopper 10 having a discharge port 10b formed at its lower end is connected to a side portion of the discharge port 10b so as to communicate with each other. A powder and granular material supply device which is attached to a hopper 10 at a predetermined angle with respect to a horizontal line, and has a supply pipe 16 having a supply port 16a at its lower end, and is rotatable inside the supply pipe 16. A stirring rod 17 provided, a stirring motor 18 for rotating the stirring rod 17, and a gate 23 provided at the lower end of the supply pipe 16 and capable of adjusting the opening degree of the supply port 16a.
And an opening degree adjusting motor 21 for driving the gate 23. The inclination angle of the supply pipe 16 is preferably 10 degrees or more and 60 degrees or less with respect to the horizontal line. If it exceeds 60 degrees, the outflow rate of the powder or granules from the supply port 16a becomes too high, and it is difficult to finely supply it. If it is less than 10 degrees, the outflow rate becomes too small and much time is required for the supply.

[0006]

The powder and granules stored in the hopper 10 enter the supply pipe 16 through the discharge port 10b by gravity. When supplying the powder or granules, the stirring rod 17 is rotated by the stirring motor 18 to make the powder or granules in a fluid state, while the gate 23 is driven according to the supply amount to adjust the opening of the supply port 16a.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 1 to 5, the powder and granular material storage hopper 10 is a hopper for storing the fine powder A,
A charging pipe 11 for putting the powder A therein and a stirring frame 12 are provided inside thereof. A rotating shaft 14 of a stirring motor 13 is rotatably inserted through a central portion of an upper lid 10a of the hopper 10, and an upper portion of a stirring frame 12 is fixed to a lower end of the rotating shaft 14 with its center offset from the rotating shaft 12. It The stirring frame 12 is rotated in the hopper 10 by driving the motor 13 to facilitate the flow of the powder A.

A discharge port 10 formed at the lower end of the hopper 10.
A side portion of the supply pipe 16 is connected to and connected to b. Since the substance stored in the hopper 10 is a fine powder which is hard to flow, the supply pipe 16 is attached to the lower end of the hopper 10 with a predetermined angle α with respect to the horizontal line H, in this example, 30 °. , About 70% of the side portion communicates with the discharge port 10b. A supply port 16a is formed at the lower end of the supply pipe 16.
In this example, the hopper 10 has a diameter of 250 mm and the supply pipe 16 has a diameter of 50 mm. Inside the supply pipe 16, a stirring rod 17 is provided which faces the discharge port 10b and extends to the supply port 16a.

A rotating shaft 19 of a stirring motor 18 is rotatably inserted through the upper lid 16b of the supply pipe 16, and an upper end of a stirring rod 17 is connected to the lower end of the rotating shaft 19 while being offset from the rotating shaft 19. The stirring rod 17 is rotated in the supply pipe 16 by driving the motor 18 to facilitate the flow of the powder A. As shown in FIG. 3, an opening adjustment motor 21 is provided near the lower end of the supply pipe 16, and a plate-shaped gate 23 is fixed to a tip of a rotary shaft 22 of the motor 21 with a bolt 24. . The motor 21 is a stepping motor and is controlled by the controller 26. The output of the electronic balance 27 installed below the supply port 16a is connected to the input of the controller 26. When the motor 21 rotates, the gate 23
Moves from the fully closed state in which the supply port 16a is closed (FIG. 2) to the fully open state in which the opening degree of the supply port 16a is continuously increased and all the supply ports 16a are opened. As shown in FIG. 4 and FIG. 5, the gate 23 is located below the supply port 16a from the supply port 16a.
Is configured to open.

The operation of the feeding device having such a configuration will be described. First, the powder A is charged into the hopper 10 from the charging pipe 11 with the supply port 16a of the supply pipe 16 sealed by the gate 23. The powder A is filled in the supply pipe 16 through the hopper 10 by gravity. Next, the stirring motors 13 and 1
When 8 is driven and the stirring frame 12 and the stirring rod 17 are respectively rotated, air enters around the powder A and the powder easily flows. In this state, the opening adjusting motor 21 is driven in accordance with the designated powder supply amount to move the gate 23 in the direction of the solid arrow in FIGS. 1 and 2, and initially as shown in FIG. Widely open the mouth 16a. When the designated supply amount is approached, the motor 21 reversely rotates and the gate 23 is gradually moved in the direction of the broken line arrow in FIG. 1 to make the supply amount very small as shown in FIG. 5, and when the designated supply amount is reached, the supply port 16a is opened. Close.

6 to 10 show a powder and granular material feeder according to another embodiment of the present invention. 6 to 10, the same components as those of the above embodiment are shown by adding 20 to the reference numerals of the above embodiment. In this example, the granular material B having a relatively large particle diameter is stored in the powder and granular material storage hopper 30. Therefore, the hopper 30 is not provided with the stirring frame and the stirring motor shown in the above embodiment. The characteristic configuration of this example is that a cylindrical body 48 connected to the supply pipe 36 is rotatably provided outside the supply port 36a, and a cylindrical body rotation shaft 49 penetrating the inside of the supply pipe 36 is inserted into the cylindrical body 48. The lower end of is connected. That is, a rod-shaped stay 48b is installed inside the cylindrical body 48, and the lower end of the shaft 49 is connected to the center of the stay 48b. The upper end of the shaft 49 is the cylinder rotation motor 3
8 is connected to a rotary shaft 39. Further, since the substance stored in the hopper 30 is a granular material having a large particle size that easily flows, the supply pipe 36 is inclined by a predetermined angle β with respect to the horizontal line H, and in this example, it is inclined by 15 degrees, which is gentler than the above embodiment. Then, it is attached to the lower end of the hopper 30, and about 100% of the side part is the outlet 3.
Connect to 0b. As shown in FIGS. 9 and 10, the gate 43 is configured to open the cylinder outlet 48a from the upper portion of the cylinder outlet 48a.

The operation of the supply device having such a configuration will be described. First, the granules B are charged into the hopper 30 from the charging pipe 31 with the cylinder outlet 48 a of the cylinder 48 sealed by the gate 43. Grain B is gravitated by the hopper 30 and the supply pipe 36.
It is filled into the cylindrical body 48 through. Then, the opening adjusting motor 41 is driven in accordance with the supply amount of the granular material designated in this state to move the gate 43 in the direction of the solid arrow in FIGS. 6 and 7. When supplying a large amount, the cylinder outlet 48a is largely opened as shown in FIG. 10 while the cylinder 48 is stopped. The granules B continuously drop from the tube outlet 48a due to their fluidity, and the container C placed on the electronic balance 47 below.
It is continuously dropped and supplied.

Next, when supplying a small amount to a small amount, the motor 4
1 reversely moves the gate 43 as shown by the broken line arrow in FIG. 10, narrows the opening of the cylinder outlet 48a as shown in FIG. 9, and rotates the cylinder 48. As a result, a small amount to a minute amount can be continuously supplied. That is, the cylinder outlet 48a
When the tubular body 48 is stopped with the opening of the
At the angle of repose peculiar to the particles in 8, the particles stop falling,
When the cylinder 48 is rotated, the particles are lifted in the cylinder and continuously fall from the cylinder outlet 48a. When the designated supply amount is reached, the motor 41 is further rotated in the reverse direction to move the gate 43 and
The cylinder outlet 48a is closed as shown in FIG.

[0014]

As described above, according to the present invention, the discharge port of the hopper is provided with the inclined supply pipe, and the supply port or the cylinder outlet of the cylinder is opened according to the supply amount of the granular material. Since the degree is adjusted by the gate, the mechanism is simple, and it is possible to accurately supply a large amount of powder or a small amount of powder without increasing the size of the supply device. In particular, there is an advantage that even a fine powder or granule that is hard to flow can be smoothly supplied and the supply amount can be easily controlled by rotating the stirring rod or the cylinder.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a powder and granular material supply device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a gate with its supply port fully closed.

FIG. 3 is a diagram showing an opening degree adjusting motor for driving the gate.

FIG. 4 is a diagram showing a gate with its supply port fully opened.

FIG. 5 is a diagram showing the gate with its supply port slightly opened.

FIG. 6 is a configuration diagram of a powder and granular material supply device according to another embodiment of the present invention.

FIG. 7 is a view showing the gate in a state in which the cylinder outlet is fully closed.

FIG. 8 is a diagram showing an opening degree adjusting motor for driving the gate.

FIG. 9 is a view showing the gate in a state in which its cylinder outlet is slightly opened.

FIG. 10 is a view showing the gate in a state in which the cylinder outlet is fully opened.

[Explanation of symbols]

 10, 30 Powder storage hopper 10b, 30b Discharge port 16,36 Supply pipe 16a, 36a Supply port 17 Stirring rod 18 Stirring motor 21,41 Opening adjustment motor 23,43 Gate 38 Cylindrical rotation motor 48 Cylinder 48a Cylinder outlet 49 Cylinder rotation shaft

Claims (6)

[Claims] 1. A hopper for powder and granular material storage (10) having a discharge port (10b) formed at a lower end thereof, and a side portion communicating with and connected to the discharge port (10b). A powder and granular material supply device that is inclined and attached to the hopper (10), and has a supply pipe (16) having a supply port (16a) at the lower end, and is provided inside the supply pipe (16). Rotatable stir bar (17)
And a stirring motor (18) for rotating the stirring rod (17),
A gate (23) provided at the lower end of the supply pipe (16) and capable of adjusting the opening of the supply port (16a), and an opening adjustment motor (21) for driving the gate (23). A powder and granular material feeder. 2. The powdery or granular material supply device according to claim 1, wherein the inclination angle of the supply pipe (16) is 10 degrees or more and 60 degrees or less with respect to the horizontal line. 3. The gate (23) is a supply port (16a) of a supply pipe (16).
The powdery or granular material supply device according to claim 1, wherein the supply port (16a) is opened from the lower part of the. 4. A granular material storage hopper (30) having a discharge port (30b) formed at a lower end thereof, and a side portion communicating with and connected to the discharge port (30b) at a predetermined angle with respect to a horizontal line. A powder and granular material supply device that is inclined and attached to the hopper (30), and has a supply pipe (36) having a supply port (36a) at the lower end, and is provided outside the supply port (36a). A cylindrical body (48) that is rotatably provided and communicates with the supply pipe (36), and a cylindrical body that penetrates the inside of the supply pipe (36) and has the lower end to which the cylindrical body (48) is connected. Shaft (49), a cylinder rotation motor (38) for rotating the shaft (49), and provided at the lower end of the cylinder (48),
Gate that can adjust the opening of the cylinder outlet (48a) of the cylinder (48)
(43) and an opening adjustment motor (4) for driving the gate (43)
1) A powder and granular material supply device comprising: 5. The powdery or granular material supply device according to claim 4, wherein the inclination angle of the supply pipe (36) is 10 degrees or more and 60 degrees or less with respect to the horizontal line. 6. The powdery or granular material supply device according to claim 4, wherein the gate (43) is configured to open the cylinder outlet (48a) from an upper portion of the cylinder outlet (48a) of the cylinder (48).