JPH07304511A - Continuous fixed volume supply device of powder/grain - Google Patents

Abstract

PURPOSE:To discharge powder/grain stored in a hopper by the uniform, continuous and stable fixed volume without requiring manpower in a continuous fixed volume supply device of the powder/grain. CONSTITUTION:A discharge device 40 has a motor 71 and a screw 72 which is rotated by a motor shaft of this motor 7 and sends out powder/grain 20 received in a hopper 30 toward a hopper discharge port 32. The screw 72 has a screw shaft 75 rotated by the motor shaft and a screw blade 76 formed in a spiral shape around this screw shaft 75, and the sending-out volume per pitch of the screw blade 76 is made gradually increasable in the sending-out direction of the powder/grain 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for continuously feeding powder and granules, and more particularly, to a device for continuously and uniformly sending powder and granules such as uncured concrete discharged from a hopper to the next step. Is.

[0002]

2. Description of the Related Art FIG. 6 is a schematic cross-sectional view showing a conventional powdery- or granular-material feeder, and reference numeral 410 in the drawing denotes a conventional powdery- or granular material feeder. In addition, in the figure, reference numeral 420 denotes a powder or granular material, which is uncured concrete or the like.

Conventionally, as shown in FIG. 6, a supply device 410 for this type of powder or granular material 420 has a conical shape that opens upward,
A hopper 430 for storing the powder or granules 420 therein, and a discharging device 440 located below the hopper 430 for discharging the powder or granules 420 stored inside the hopper 430 to the outside, the hopper 430 and the discharging device. A trolley 45 on which 440 is mounted and can run
0 and a beam 460 on which the carriage 450 can travel.

The hopper 430, as shown in FIG.
A hopper bracket 431 fixed around the hopper 430 and supporting the hopper 430, and a granular material
It has a hopper discharge port 432 that discharges 0 to the outside, and a weighing sensor 433 that is located between the bracket 431 and the carriage 450 and that measures the weight of the powder or granular material 420 stored in the hopper 430.

As shown in FIG. 6, the weighing sensor 433 is a load cell capable of measuring the total weight of the hopper 430, the powder particles 420 stored in the hopper 430, and the discharging device 440, and supports the hopper 430. It is arranged at the four corners of the bracket 431. As shown in FIG. 6, the discharging device 440 includes a screw feeder 470 for discharging the powder or granular material 420 inside the hopper 430 to the outside.

The screw feeder 470 has a motor 471 as a drive source and a screw 472 driven by the motor 471. Also, this screw 472 is
As shown in FIG. 6, the rotational driving force of the motor 471 is the chain 4
It has a screw shaft 475 that is transmitted via 74, and screw blades 476 that are spirally formed around this screw shaft 475 with an equal pitch and an equal diameter.

As shown in FIG. 6, the carriage 450 includes a rectangular frame-shaped vehicle body 451 and a motor 453 mounted on the vehicle body 451.
And a chain 454 that transmits the driving force of this motor 453,
It is driven to rotate via this chain 454 and the body 4
It has wheels 452 provided at the four corners of 51. Beam 4
As shown in FIG. 6, 60 is the wheel 452 on the upper part thereof.
A rail 461 is formed so that the vehicle can travel.

[0008] The conventional feeding device 410 configured as described above
Then, as shown in FIG. 6, the motor 471 that drives the screw shaft 475 is rotated at a constant rotation speed to discharge the powder and granules 420 in the hopper 430. Then, in the cart 450 equipped with the hopper 430, the motor 453 mounted on the vehicle body 451 rotatably drives the wheels 452 via the chain 454, travels horizontally on the rail 461, and discharges from the discharge port 432 of the hopper 430. The powder 420 thus obtained was continuously supplied to the next step.

At this time, the operator operating the supply device 410 adjusts the rotation speed of the motor 453 to increase or decrease the traveling speed of the trolley 450 while observing the discharge state of the granular material 420.
Was adjusted so as to be uniformly supplied to the next step.

[0010]

However, the above-mentioned conventional powdery- or granular-material feeder has the following problems. (A) In the screw feeder 470, the pitch and outer diameter of the screw blades 476 formed in a spiral shape are constant, and the screw volume per pitch, that is, the feeding amount is the same, so the powder stored in the hopper 430 is Granules 420 are
The screw was sequentially sent out from the inlet side, that is, the side opposite to the hopper discharge port 432, by the screw 472, and the discharge side, that is, the one closer to the hopper discharge port 432, was discharged later.

Therefore, the granular material 4 in the hopper 430 is
The upper surface of 20 is a slope that is low on the inlet side and high on the discharge side,
The distribution of bulk specific gravity became non-uniform, and the discharged weight varied.
Further, in the case of the granular material 420 that has solidification property or adhesive property over time such as uncured concrete, the part discharged late is hardened, causing a void phenomenon and making continuous discharge impossible. There was a chance In this case, not only labor and time are required for the work to eliminate the defective portion, but also a defective product is caused. (B) The weighing sensor 433 is mounted between the bracket 431 of the hopper 430 and the carriage 450 while supporting the hopper 430, and weighs the weight of the hopper 430 and the weight of the granular material 420 put into the hopper 430. Since it is designed to measure the total of the above, a large-capacity weighing sensor 433 was required.

For this reason, the weighing sensor 433 becomes expensive, and the weighing sensor 433 having a large capacity is used for the small-sized powder particles 4.
It was decided to measure 20. Therefore, the measurement accuracy of the granular material 420 itself is deteriorated, and it is difficult to control the quantitative discharge. (C) The traveling speed of the carriage 450 for moving the hopper 430 in the horizontal direction is increased or decelerated or stopped while the operator observes the discharge state of the powder and granules 420, and is continuously and uniformly supplied to the next process. I had to adjust it so that I could.

Therefore, in addition to requiring manpower, these operations are difficult and require skill, resulting in poor productivity. Therefore, the invention according to claim 1 is made in view of the problems of the above-described conventional technology, and the purpose thereof is to eliminate the need for manpower for the granular material stored in the hopper, An object of the present invention is to provide a continuous quantitative supply device for powder and granules capable of uniform and continuous stable quantitative discharge.

In addition to the above-mentioned object, the invention according to claim 2 is to provide a continuous constant quantity supply device for powder and granular material capable of continuous constant quantity supply. The invention according to claim 3 is
By gradually increasing the pitch of the screw blades in the feeding direction, the powder particles are taken in over the entire length in the longitudinal direction of the screw, so that the powder can be continuously and stably supplied.

According to the fourth aspect of the present invention, by gradually increasing the outer diameter of the screw blade in the feeding direction, the powder particles can be taken in over the entire length in the longitudinal direction of the screw, and continuous and stable supply can be achieved. It was done like this. In the invention according to claim 5, the outer diameter of the screw shaft is gradually reduced in the feeding direction, so that the powder and granules can be taken in over the entire length in the longitudinal direction of the screw to continuously and stably supply the powder. It is a thing.

[0016]

The present invention is to achieve the above-mentioned object, and the contents thereof will be described below with reference to the embodiments shown in the drawings. In the invention according to claim 1, the discharging device (40) is rotated by the motor (71) and the motor shaft of the motor (71), and the powder or granular material (20) received in the hopper (30) is discharged into the hopper. The screw (72) is equipped with a screw (72) that is sent toward the outlet (32), and the screw (72) includes a screw shaft (75) rotated by a motor shaft and the screw shaft (75).
(75) is provided with a screw blade (76) formed in a spiral shape, and the delivery volume per pitch of the screw blade (76) is gradually increased in the delivery direction of the granular material. Is characterized by.

According to a second aspect of the present invention, a conveyor (80) for conveying the powder or granular material (20) discharged from the hopper discharge port (32) by the screw (72), and a conveyor (80) for conveying the granular material (20). The weighing sensor (85) that outputs the weighing signal and the rotation detector (7) that detects the rotation speed of the screw (72) and outputs the rotation detection signal while measuring the weight of the granular material (20)
3), the weighing signal from the weighing sensor (85) and the rotation detector (7
And a drive control unit for controlling the rotation speed of the motor (71) according to the rotation detection signal from 3).

The invention according to claim 3 is characterized in that the pitch of the screw blades (76) of the screw (72) is formed so as to gradually increase in the feeding direction. The invention according to claim 4 is characterized in that the screw blade (76) of the screw (72) is formed such that the outer diameter of the screw blade (76) gradually increases in the feeding direction.

The invention according to claim 5 is characterized in that the outer diameter of the screw shaft (75) of the screw (72) is formed so as to become gradually smaller in the feeding direction.

[0020]

Therefore, according to the invention described in claim 1, in the lower part of the hopper (30) in which the granular material (20) is stored,
It is equipped with a motor (71) and a screw (72).
2) is a screw shaft (75) rotated by a motor shaft,
A screw blade (76) formed in a spiral shape around the screw shaft (75) is provided.

Since the screw (72) is located in the lower portion of the hopper (30), the powder or granules (20) enter between the screw blades (76) due to the weight of the powder or granules (20). And
When the screw shaft (75) is rotated by the rotational driving force of the motor (71), the screw blades (76) formed around the screw shaft (75) also rotate, and the powder particles (2
0) is pushed by the slope of the screw blade (76) and transferred to the hopper discharge port (32).

At that time, the screw blade of the screw (72)
The delivery volume per pitch of (76) is formed so as to gradually increase in the delivery direction of the powder or granular material (20). That is, as it gets closer to the hopper discharge port (32), a space for newly taking in the granular material (20) is generated. Therefore, the powder or granular material (20) can be taken in between the screw blades (76) over the entire length of the screw shaft (75) in the longitudinal direction.

As a result, the granular material (2) inside the hopper (30) is
(0) is sequentially sent from the granular material 20 previously charged into the hopper (30) toward the hopper discharge port (32) by the screw (72), and is discharged uniformly and continuously without deviation. The entire upper surface of the granular material (20) descends at the same time.
Therefore, since the granular material (20) always flows downward in the hopper (30) and there is no stagnant portion, the distribution of the bulk specific gravity of the granular material (20) in the hopper (30) is Even if the powder (20) can be made uniform and has a solidification property and an adhesive property over time, problems such as a void phenomenon and clogging do not occur.

According to the invention of claim 2, the hopper (3
Granules (20) charged inside (0) are screw shafts (75)
Is rotated and is sent toward the hopper discharge port (32) and discharged onto the transfer conveyor (80). At this time,
The weighing sensor (85) provided on the conveyor (80)
The discharged weight of 0) is detected, and the weight detection signal is transmitted to the drive control unit (not shown).

On the other hand, the rotation detector (73) attached to the screw feeder (70) detects the rotation speed of the screw shaft (75) and sends the rotation speed detection signal to a drive control unit (not shown). . In the drive control section (not shown) to which the weight detection signal and the rotation speed detection signal are input, the relationship between the rotation speed of the screw shaft (75) and the discharged weight is calculated by these signals, and the hopper discharge port (32 )), The motor (71) that drives the screw shaft (75) so that the discharge weight per unit time of the granular material (20) discharged onto the conveyor (80) is always constant.
Automatically controls the rotation speed of.

As a result, it is possible to continuously discharge the granular material (20) having a constant discharge weight per unit time on the transfer conveyor (80). Therefore, the granular material (20) is
Equivalent amounts can be continuously supplied from the transfer conveyor (80) to the next step without requiring manpower. According to the third aspect of the invention, the pitch of the screw blades (76) of the screw (72) is formed so as to gradually increase in the feeding direction.

Therefore, the delivery volume per pitch can be gradually increased in the delivery direction of the powder or granular material (20). That is, as it gets closer to the hopper discharge port (32), a space for newly taking in the granular material (20) is generated. As a result, in the entire length of the screw shaft (75) in the longitudinal direction, the powder or granular material (20) is screwed into the screw blade (7
6) Granules that can be taken in between and inside the hopper (30)
(20) can be discharged uniformly and continuously without bias.

According to the invention of claim 4, the screw
The outer diameter of the screw blade (76) of (72) is formed so as to gradually increase in the feeding direction. Therefore, the delivery volume per pitch can be gradually increased in the delivery direction of the granular material (20). That is, as it gets closer to the hopper discharge port (32), a space for newly taking in the granular material (20) is generated.

As a result, the powder or granules (20) can be taken in between the screw blades (76) over the entire length of the screw shaft (75) in the longitudinal direction, and the powder or granules (20) inside the hopper (30).
Can be discharged uniformly and continuously without bias. According to the fifth aspect of the invention, the outer diameter of the screw shaft (75) of the screw (72) is formed so as to become gradually smaller in the feeding direction.

Therefore, the delivery volume per pitch can be gradually increased in the delivery direction of the granular material (20). That is, as it gets closer to the hopper discharge port (32), a space for newly taking in the granular material (20) is generated. As a result, in the entire length of the screw shaft (75) in the longitudinal direction, the powder or granular material (20) is screwed into the screw blade (7
6) Granules that can be taken in between and inside the hopper (30)
(20) can be discharged uniformly and continuously without bias.

[0031]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view showing a continuous quantitative supply device for powder and granular material, and FIG. 2 is a side view thereof. . In FIG. 1, reference numeral 10 denotes a powdery or granular material continuous quantitative supply device according to a first embodiment of the present invention, and reference numeral 20 denotes powdery or granular material handled in the continuous powdery quantitative supply device 10.

As shown in FIGS. 1 and 2, the continuous quantitative supply device 10 for the powder and granules 20 comprises a hopper 30 for storing the powder and granules 20.
A discharge device 40 for discharging the powder or granular material 20 stored in the hopper 30 to the outside, a trolley 50 on which the hopper 30 and the discharge device 40 are mounted and which can travel in the horizontal direction, and this trolley 50 can travel. And has a beam 60 connected to the foundation.

As shown in FIGS. 1 and 2, the hopper 30 has a hollow inside and is formed in a triangular prism shape having an upward opening. In addition, as shown in FIGS. 1 and 2, the hopper 30 includes a hopper bracket 31 that supports the entire weight of the hopper 30 at the upper end thereof, and a hopper bracket 30 that is the lower portion of the hopper bracket 31 and that stores the powder particles 20 stored therein. Hopper outlet 32 for discharging to the outside of
It has and.

As shown in FIGS. 1 and 2, the discharging device 40 is disposed in the lower part of the hopper 30, and is provided with a screw feeder 70 for discharging the granular material 20 received in the hopper 30 downward from the hopper discharging port 32. , This screw feeder
A conveyor 80 that is located below 70, receives the granular material 20 discharged downward from the hopper discharge port 32, and conveys it to the outside of the continuous fixed amount supply device 10, and a screw feeder 70.
Calculates the relationship between the number of revolutions of the powder and the weight of the powder 20 conveyed by the conveyor 80, and the discharge weight per unit time of the powder 20 discharged from the hopper discharge port 32 onto the conveyor 80 is always constant. Therefore, a drive control unit (not shown) that controls the rotation drive of the screw feeder 70 is provided.

The screw feeder 70 is shown in FIGS.
As shown in, a motor 71 that applies a rotational driving force, a screw 72 that is rotated by the rotational driving force of the motor 71,
It has a rotation detector 73 that detects the number of rotations of the screw 72 and outputs a rotation detection signal. As shown in FIGS. 1 and 2, the motor 71 has a chain 74 that is hung on its motor shaft and transmits a rotational driving force.

As shown in FIGS. 1 and 2, the screw 72 has a columnar shape, and a screw shaft 75 that rotates when a rotational driving force is transmitted through a chain 74 and an outer periphery of the screw shaft 75. And a screw blade 76 formed in a spiral shape. The screw blade 76 is shown in FIG.
As shown in FIG. 5, the pitch, which is the interval between the screw blades 76, and the outer diameter thereof are formed so as to gradually increase toward the hopper discharge port 32. That is, the delivery volume per pitch of the screw blades 76 is set to gradually increase toward the hopper discharge port 32.

As shown in FIGS. 1 and 2, the transfer conveyor 80 is a motor which is located below the transfer conveyor 80 and applies a rotational driving force.
81 and a drive roller 82 that is rotationally driven by this motor 81.
A conveyor belt 83 wound around the drive roller 82, an intermediate roller 84 inside the conveyor belt 83 for supporting the conveyor belt 83, and one of the intermediate rollers 84 for supporting the conveyor belt 83. It has a weighing sensor 85 that measures the weight of the granular material 20 conveyed from 83 and outputs a weighing signal.

Although not shown, the drive control section includes a rotation detection signal from the rotation detector 73 and the weighing sensor 85.
From the hopper discharge port 32 to the conveyor 80 to calculate the relationship between the number of revolutions of the screw shaft 75 and the discharge weight of the granular material 20, and the unit of the granular material 20 to be discharged per unit time. It is set so that the discharge weight of is constant.

As shown in FIGS. 1 and 2, the carriage 50 has a rectangular plate shape, and has a vehicle body 51 to which the hopper 30 and the like are fixed, and wheels 52 fixed to the lower four corners of the vehicle body 51. And have. The vehicle body 51, as shown in FIGS.
A motor 53 that applies a rotational driving force, a chain 54 that is hung on the rotation shaft of the motor 53 and that transmits the rotational driving force, and a drive shaft 55 that transmits the rotational driving force through the chain 54 and that rotates. It has a vehicle body bracket 56 for fixing the drive shaft 55 to the vehicle body, and a disc-shaped pinion 57 having teeth formed on the outer periphery, which are mounted on both ends of the drive shaft 55 on the same axis.

As shown in FIG. 2, the wheels 52 are set to support the weight of the vehicle body and rotate so that they can travel in the horizontal direction. As shown in FIG. 2, the beam 60 has an I-shaped cross-section, the longitudinal direction of which is horizontal, and two beams 52 are fixed in parallel on the foundation of the building at the positions corresponding to the wheels 52. Further, the beam 60 is on the upper portion thereof, on which the wheels 52 are placed, and on which the vehicle body 51 can run, and on the inner side surface which is the upper end of the rail 61 and which opposes each other, the longitudinal direction is horizontal. It has a square rod shape placed in the direction, has teeth formed on the lower surface, and a rack 62 with which the pinion 57 is engaged.

The operation and effect of the continuous fixed amount supply device 10 for the powder or granular material 20 configured as described above will be described. The continuous quantitative supply device 10 of the granular material 20 according to the present embodiment, as shown in FIGS. 1 and 2, the granular material 20 such as concrete in an uncured state that has been put into the hopper 30, due to its own weight. , Hopper 30
It enters between the screw blades 76 of the screw 72 arranged at the lower part.

When the screw shaft 75 is rotated via the chain 74 by the rotational driving force of the motor 71, the screw blades 76 formed around the screw shaft 75 are also rotated, and the powder particles entering between the screw blades 76 are rotated. 20 is screw blade 76
It is pushed by the slope of and is transferred to the hopper discharge port 32. At that time, the delivery volume per pitch of the screw blades 76 of the screw 72 is formed so as to gradually increase in the delivery direction of the powder or granular material 20, as shown in FIG.
As it gets closer to the hopper discharge port 32, powder particles are newly added.
There is a space that can capture 20.

Therefore, the powder particles 20 can be taken in between the screw blades 76 over the entire length of the screw shaft 75 in the longitudinal direction, and the powder particles 20 inside the hopper 30 can be uniformly and continuously distributed. The particles 20 can be discharged, the entire surface of the particles 20 can be lowered at the same time, and the particles 20 can be discharged in the order of being charged into the hopper 30. Therefore, the granular material 20 always flows downward in the hopper 30, and since there is no stagnant portion, it is possible to make the distribution of the bulk specific gravity of the granular material 20 in the hopper 30 uniform, and also to uncured. Even when using a granular material 20 that has a solidifying property or an adhesive property over time, such as concrete in a state, the part discharged later in the hopper 30 is cured, and by forming a shelf inside the hopper 30. Therefore, it is possible to prevent the occurrence of defects such as the occurrence of cavities, which makes continuous discharge impossible.

As a result, it is possible to continuously discharge the homogeneous and stable powdery or granular material 20, reduce the occurrence of product defects, and reduce the manpower and time required for the work to eliminate the defects. You can Then, the granular material 20 inside the hopper 30 is, as shown in FIGS.
Is rotated, and is discharged toward the hopper discharge port 32, and is discharged from the hopper discharge port 32 onto the conveyor 80.

As shown in FIGS. 1 and 2, the transfer conveyor 80 includes a drive roller 82 to which a rotational drive force of a motor 81 is transmitted.
When the roller rotates, the conveyor belt 83 hung on the drive roller 82 and the intermediate roller 84 circulates between them. At this time, the weighing sensor 85 provided on one of the intermediate rollers 84 of the transport conveyor 80 detects the discharged weight of the granular material 20,
The weight detection signal is transmitted to a drive control unit (not shown).

At this time, since the weighing sensor 85 is attached to the lower portion of the intermediate roller 84 as shown in FIG. 1, the weight of the hopper 30 does not act on the weighing sensor 85 and is continuously fed. It is possible to measure a nearly net weight of the granular material 20. Therefore, the accuracy of weighing the powder 20 itself becomes better than when the self-weight of the hopper 30 is added, and the discharged weight can be easily quantified and controlled. It is possible to reduce the equipment cost.

On the other hand, the rotation detector 73 attached to the screw feeder 70 detects the rotation speed of the screw shaft 75,
The rotation speed detection signal is transmitted to a drive control unit (not shown). In the drive control unit (not shown) to which the weight detection signal and the rotation speed detection signal are input, the relationship between the rotation speed of the screw shaft 75 and the discharged weight is calculated based on both of these signals, and the hopper discharge port 32 conveys the conveyor. The rotation speed of the motor 71 that drives the screw shaft 75 is automatically controlled so that the discharge weight of the powder or granular material 20 discharged onto the unit 80 is always constant.

Therefore, the powder particles 20 put into the hopper 30 are continuously conveyed by a fixed amount without any manpower.
Emitted over 80. Then, the powder or granular material 20 is placed on the conveyor 80 and sent, and is supplied to the next step. On the other hand, the trolley 50 to which the hopper 30 and the conveyor 80 are attached has a rotational driving force chained by the forward / reverse rotation of the motor 53.
It is transmitted to the drive shaft 55 via 54, and the pinions 57 fixed to both ends of the drive shaft 55 rotate. This pinion 57 is a rack
By rotating and moving on the wheel 62, the wheels 52 rotate and move on the rail 61, and the carriage 50 travels in the horizontal direction at a constant speed.

Therefore, from the hopper 30 to the conveyor
The granular material 20 discharged onto the 80 is continuously and evenly supplied onto the process equipment of the next step while moving in the horizontal direction. In addition, as described above, the screw feeder 70
The rotational drive of the motor uses a variable speed motor 71, and the rotation speed is automatically controlled by the drive control unit based on the weighing signal, so that the discharge weight per unit time on the conveyor 80 is a constant powder particle. The body 20 can be continuously discharged.

Therefore, even when the hopper 30 or the process equipment of the next process is run, it is not necessary to manually adjust the running speed in order to supply the powder 20 in a fixed amount, which is a great labor saving effect. is there. Next, a continuous quantitative supply device for powder and granules according to a second embodiment of the present invention will be described.

FIG. 3 is a vertical cross-sectional view showing a screw of a powdery granular material continuous quantitative supply device according to a second embodiment of the present invention. In this embodiment, only the shape of the screw 72 in the above-described first embodiment is different, and the other configurations are the same as those in the first embodiment. In the figure, 172 is a screw, a conical screw shaft 175 formed so that its diameter is gradually reduced toward the direction of sending out the granular material 20, and a spiral around the outer periphery of this screw shaft 175. And the formed screw blade 176.

As shown in FIG. 3, the screw blades 176 are formed so that the distance between the screw blades 176, that is, the pitch, is gradually increased in the direction in which the powder or granular material 20 is sent out. The outer diameter of the screw blade 176 is set to be constant in the longitudinal direction.

Therefore, the screw in the first embodiment
Compared with 72, only the shaft diameter of the screw shaft 175 and the outer diameter of the screw blade 176 are different, and all other parts are formed similarly. Therefore, as shown in FIG.
The pitch of the screw blades 176 is gradually increased in the direction of feeding the
In the present embodiment, the delivery volume per pitch of the screw blades 176 can be gradually increased in the direction of delivering the granular material 20 by gradually reducing the diameter of the first embodiment. Similarly to the above, the homogeneous and stable powder 20 can be continuously discharged, and the same effect can be obtained.

Next, a continuous quantitative supply device for powder and granules according to the third embodiment of the present invention will be described. FIG. 4 is a vertical cross-sectional view showing a screw of a powdery or granular material continuous quantitative supply device according to a third embodiment of the present invention. This embodiment is different in the shape of only the screw 72 in the above-mentioned first embodiment,
Others are all formed in the same structure as the first embodiment.

In the figure, 272 is a screw,
It has a conical screw shaft 275 formed so that its diameter becomes gradually smaller in the direction of sending 0, and a screw blade 276 spirally formed on the outer periphery of this screw shaft 275. The screw blade 276 is
As shown in FIG. 4, the outer diameter of the screw blade 276 is formed so as to gradually increase in the direction in which the powder or granular material 20 is sent out.

The distance between the screw blades 276, the so-called pitch, is set to be constant in the longitudinal direction. Therefore, as compared with the screw 72 in the first embodiment, only the shaft diameter of the screw shaft 275 and the pitch of the screw blades 276 are different, and everything else is formed in the same manner.

Therefore, as shown in FIG.
In the present embodiment, the outer diameter of the screw blade 276 is gradually increased and the diameter of the screw shaft 275 is gradually reduced, in the present embodiment.
The delivery volume per pitch of the screw blades 276 can be gradually increased in the direction of delivering the powder / granular material 20. As with the first embodiment, the homogeneous and stable powder / granular material can be obtained.
20 can be continuously discharged, and the same effect can be obtained.

Next, a continuous quantitative supply device for powder and granules according to a fourth embodiment of the present invention will be described. FIG. 5 is a vertical cross-sectional view showing a screw of a continuous constant-quantity feeder for powder and granules according to a fourth embodiment of the present invention. This embodiment is different in the shape of only the screw 72 in the above-mentioned first embodiment,
Others are all formed in the same structure as the first embodiment.

In the figure, 372 is a screw,
It has a conical screw shaft 375 formed so that its diameter becomes gradually smaller in the direction of sending 0, and a screw blade 376 spirally formed on the outer periphery of this screw shaft 375. In the present embodiment, as shown in FIG. 5, the outer diameter and pitch of the screw blades 376 are set to gradually increase in the direction in which the powder or granular material 20 is sent out, and the shaft diameter of the screw shaft 375 is set to Granule 2
It is set so that it becomes gradually smaller in the direction of sending 0.

That is, as compared with the screw 72 in the first embodiment, the screw shaft 375 has a different shaft diameter. Therefore, as shown in FIG. 5, the outer diameter and pitch of the screw blade 376 are gradually increased and the diameter of the screw shaft 375 is gradually reduced toward the direction in which the powder or granular material 20 is sent out. The delivery volume per pitch can be gradually increased in the direction of delivering the powder or granular material 20 at a rate larger than that of the first embodiment, and is more homogeneous and stable than that of the first embodiment. The granular material 20 can be continuously discharged.

In the above-described first to fourth embodiments, the hopper 30 and the conveyer conveyor 80 provided below the hopper 30 are mounted on the carriage 50 that travels in the horizontal direction, and the process equipment for the next process is placed at a fixed position. Although the case where the hopper 30 is fixed is shown as an example, the present invention is not limited to this, and the hopper 30 and the transfer conveyor 80 provided below the hopper 30 may be fixed at a fixed position and the process equipment of the next step may be moved.

Further, both the hopper 30, the conveyor 80 provided below the hopper 30, and the process equipment for the next step,
It may be fixed in place.

[0063]

Since the present invention is constituted as described above, it has the following effects. Claim 1
According to the above-described invention, it is possible to provide a continuous quantitative supply device for powder and granules, which can discharge the stored powder and granules uniformly and continuously and stably without requiring manpower.

In addition to this, according to the second aspect of the present invention, it is possible to provide a continuous quantitative supply device for powdery granules capable of continuous quantitative supply. In addition to this, according to the invention described in claim 3, by gradually increasing the pitch of the screw blades in the feeding direction, the powder particles are taken in over the entire length in the longitudinal direction of the screw, and a continuous and stable supply is achieved. it can.

In addition to this, according to the invention of claim 4, by gradually increasing the outer diameter of the screw blade in the feeding direction, the powder particles are taken in continuously over the entire length of the screw in the longitudinal direction, A stable supply is possible. In addition to this, according to the invention of claim 5, by gradually reducing the outer diameter of the screw shaft in the feeding direction, the powder particles are taken in over the entire length in the longitudinal direction of the screw to continuously and stably supply the powder. can do.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a powdery or granular material continuous quantitative supply device according to a first embodiment of the present invention.

FIG. 2 is a side view showing a continuous constant-quantity supply device for powder and granules according to the first embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing a screw of a continuous constant-quantity feeder for powder and granules according to a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a screw of a powdery or granular material continuous quantitative supply device according to a third embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing a screw of a continuous constant-quantity feeder for powder and granules according to a fourth example of the present invention.

FIG. 6 is a vertical cross-sectional view showing a conventional powder and granular material supply device.

[Explanation of symbols]

10,410 Supply device 20,420 Granules 30,430 Hopper 32,432 Hopper Discharge port 40,440 Discharge device 50,450 Truck 70,470 Screw feeder 71,471 Motor 72,172,272,372,472 Screw 73 Rotation detector 75,175,275,375,475 Screw shaft 76,176,276,37
6,476 Screw blade 80 Conveyor conveyor 85 Weighing sensor

Claims (5)

[Claims] 1. A powdery- or granular-material supplying device comprising: a hopper for storing the powdery or granular material; and a discharging device which faces a hopper discharge port of the hopper and discharges the powdery or granular material stored in the hopper to the outside. The discharge device includes a motor and a screw that is rotated by the motor shaft of the motor and that discharges the powder or granular material received in the hopper toward the hopper discharge port, and the screw is a screw that is rotated by the motor shaft. A shaft and a screw blade spirally formed around the screw shaft are provided, and the delivery volume per pitch of the screw blade is configured to gradually increase in the delivery direction of the powder or granular material. Continuous quantitative supply device for powder and granules. 2. A conveyor for conveying the powder or granules discharged from the hopper discharge port by a screw, a weighing sensor for measuring the weight of the powder or granules conveyed by the conveyor, and outputting a weighing signal. A rotation detector that detects the rotation speed of the screw and outputs a rotation detection signal, and a drive control unit that controls the rotation speed of the motor by the measurement signal from the measurement sensor and the rotation detection signal from the rotation detector. The continuous fixed-quantity supply device of the powdery or granular material according to claim 1, which is provided. 3. The continuous fixed-quantity supply device for a powder or granular material according to claim 1, wherein the pitch of the screw blades of the screw is formed so as to gradually increase in the feeding direction. 4. The outer diameter of the screw blade of the screw is
The continuous fixed-quantity supply device for a powder or granular material according to any one of claims 1 to 3, wherein the continuous fixed-quantity supply device is formed so as to be gradually larger in a delivery direction. 5. The continuous fixed-quantity supply device for a powder or granular material according to claim 1, wherein the screw shaft of the screw is formed so that the outer diameter of the screw shaft becomes gradually smaller in the feeding direction.