JPS6338181Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a powder supply device.

Configuration of Conventional Example and its Problems Conventionally, this type of supply device has been configured as shown in FIG. 1 is a storage tank that temporarily stores powder and granular materials;
It is composed of a large first chamber 2 and a second chamber 4 that communicates with the first chamber 2 via a powder passage 3.
It is being sent sideways to. 7 is an agitator concentric with the screw 5, and like the screw 5, a reduction gear 8
It is rotationally driven by the output shaft of the second chamber 4 to stir the powder and granular material in the second chamber 4 to prevent arching and the like.

As shown in FIG. 8, the agitator 7 rotates in the direction of the arrow to prevent arching, but currently does not actively feed the powder into the screw 5.

However, in the past, the configuration was simplified and the screw
It is expected that cutting will be performed more efficiently by increasing the amount of feed into.

Purpose of the invention The object of the invention is to provide a powder supply device that can be expected to increase the amount of material fed to the screw by using an agitator.

Structure of the Invention The powder supply device of the present invention is configured such that the powder received into a box from above is cut out to the side of the box by a screw, and an agitator that rotates around the screw is installed in the box. The agitator is provided with a first arm whose base end is fixed to a rotary drive shaft and whose other end extends in a direction away from the screw, and from the other end of the first arm along the advancing direction of the screw. a third arm extending from the tip of the second arm in a direction approaching the screw; A protrusion is formed on an inclined surface approaching the inside of the box body toward the inside of the second arm, and a projection body extending from the fixed side of the box body toward the inside of the second arm is provided to prevent arching within the box body by turning the agitator. In addition, the agitator is configured with first to third arms to improve the stirring effect of the powder and granules, and the protrusions prevent the powder and granules from adhering to the second arm, leading to the screw. It is characterized by achieving an increase in the amount of feed.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 6.

FIG. 1 shows the entire powder supply device according to the present invention.

9, 10, and 11 are members constituting the storage tank 12, and the cylindrical body 9 with open ends is the cylindrical body 10 with a bottom.
The cylindrical body 9 is placed on top with the partition wall 13 interposed therebetween.
The relative positions of and 10 are restricted by latches 14 attached at appropriate positions in the circumferential direction, and the partition wall 13 is also held and positioned by the cylindrical bodies 9 and 10. 15 is a first chamber surrounded by the cylindrical body 9 and the partition wall 13; 16 is a second chamber surrounded by the cylindrical body 10 and the partition wall 13; the first chamber 15 and the second chamber 16 are They communicate through a first powder passage 17 bored in the partition wall 13. Reference numeral 18 denotes a third chamber surrounded by a box body 11 that communicates with the second chamber 16 via a second powder passage 19 bored in the bottom of the cylindrical body 10. The screw casings 20 are arranged in series, and the screw 21 is disposed from the third chamber 18 to the screw casings 20. Reference numeral 22 indicates a discharge port bored at the tip of the screw casing 20, and reference numeral 23 indicates an agitator disposed concentrically with the screw 21.

Further, 24 is an umbrella-shaped load support body disposed in the first chamber 15 so as to be close to the partition wall 13 and widen at the base, and 25 is a conveyor blade disposed in the second chamber 16.
The conveyor blade 25 and the load support body 24 are mounted on a rotational output shaft 27 pulled out from a speed reduction device 26 that rotationally drives the screw 21 and the agitator 23.

FIG. 2 shows details of the third chamber 18, and FIG. 3 shows a front view of the agitator 23. I is agitator 2
3 shows the turning direction. The agitator 23 has a first arm whose base end is fixed to a rotational drive shaft 28 and whose other end extends in a direction away from the screw 21.
a ₁ , a ₂ , second arms b ₁ , _{b 2} extending from the other ends of the first arms a 1 , a ₂ respectively along the direction of movement of the screw 21 [direction of the arrow];
The third arm c ₁ , c ₂ extends from the tips of the arms b ₁ , b ₂ in the direction approaching the screw 21 . The blade surface of the agitator 23 is formed into an inclined surface that approaches the inside of the box body from the lower side in the turning direction toward the upper side. Reference numeral 29 denotes a protrusion extending from the fixed side to the vicinity of the second arms b ₁ and b ₂ , as shown in FIGS. 2 and 4.
The proximal end is attached to the part of the screw casing 20 that penetrates into the third chamber 18, and the distal end is attached to the second arm b ₁ , b ₂ of the agitator 23 that rotates as shown in FIG. It is extended to the inner part.

With this configuration, the first chamber 15 is
The powder is fed from the second powder path 19 to the third chamber 16 via the
The powder filled in the third chamber 18 is fed laterally through the screw casing 20 to the discharge port 22 by the screw 21, and the arching of the powder in the third chamber 18 is broken by the rotating agitator 23.
The agitator 7 is made up of third arms _a1 , _a2 , _b1 , _b2 , _c1 , and _c2 . The agitator 7 has third arms _c1 and _c2 that are not found in the conventional agitator 7.
a ₁ , a ₂ and the second arm b ₁ , b ₂ and the third arm
The powder in the space 30 surrounded by _c1 and _c2 rotates with the rotation of the agitator 23, and the third arm
The powder particles in the box 11 can be stirred up over a wider area than in the conventional device that does not have _c1 and _c2 .
It is possible to feed more powder to the screw 21 than in the past.

Note that when the agitator 23 is configured with the first, second, and third arms a _{1 , a 2 .} Particles tend to adhere to the inside of arms b ₁ and b ₂ of 2, but in the present invention, the protrusions 29 actively scrape them off, so stable operation can be expected over a long period of time.

In the above embodiment, there was only one protrusion 29, but two protrusions 29, 29 may be arranged in parallel as shown in FIG.
A similar effect can be obtained by connecting the tips of the arms 9 so as to be close to the second arms b ₁ and b ₂ over a wide range.

Effects of the Invention As explained above, according to the powder supply device of the present invention, the powder and granular material received into the box from above is cut out to the side of the box by the screw, and the screw is inserted into the box. An agitator that rotates around the circumference is provided, and the agitator is connected to a first arm whose base end is fixed to a rotary drive shaft and whose other end extends in a direction away from the screw, and from the other end of the first arm to the A second arm extends along the advancing direction of the screw, and a third arm extends from the tip of the second arm in a direction approaching the screw. The projecting body is formed on an inclined surface that approaches the inside of the box body from the lower side toward the upper side, and extends from the fixed side of the box body toward the inside of the second arm. The agitator blade surface prevents arching inside the box, and the effect of stirring the powder over a wider range than before, and the blade surface of the agitator allows more powder and granules to be fed into the screw than before, allowing efficient cutting. It is possible. Also,
Providing the third arm increases the adhesion of powder and granules to the second arm, but since it is configured to scrape off this with the protrusion, stable operation can be achieved over a long period of time. can be expected.

[Brief explanation of the drawing]

FIG. 1 is an overall view of an embodiment of the powder supply device according to the present invention, in which a is a vertical sectional view, b is a horizontal sectional view,
Figure 2 is a vertical sectional view of the main part of Figure 1, Figure 3 is a front view of the agitator in Figure 1, and Figure 4 is A-A in Figure 2.
5 and 6 are longitudinal sectional views of other embodiments of Fig. 2, Fig. 7 is a longitudinal sectional view of a conventional powder supply device, and Fig. 8 is a front view of a conventional agitator. It is a diagram. 11...Box body, 12...Storage tank, 15, 16,
18...First, second, and third chambers, 17, 19...First and second powder and granule paths, 20...Screw casing, 21...Screw, 22...Discharge port,
23... Agitator, 28... Rotation drive shaft, 29
...Protrusion, a ₁ , a ₂ ... First arm, b ₁ , b ₂ ...
... second arm, c ₁ , c ₂ ... third arm.

Claims (1)

[Scope of utility model claims] The powder and granular material received into the box body from above is cut out to the side of the box body by a screw, and an agitator that rotates around the screw is provided in the box body, and the base end of the agitator is connected to a rotary drive shaft. a first arm that is fixed to the screw and whose other end extends in a direction away from the screw; a second arm that extends from the other end of the first arm along the advancing direction of the screw; a third extending from the tip of the screw in a direction approaching the screw;
The blade surface of this agitator is formed into an inclined surface that approaches the inside of the box body from the lower side to the upper side in the turning direction, and the blade surface of the agitator is formed as an inclined surface approaching the inside of the box body from the fixed side of the box body. A powder or granular material supply device that is provided with a protrusion extending inward, and the protrusion breaks the powder or granule adhered to the second arm.