JPH0432367Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for quantitatively cutting out granular materials, which is suitable for use in quantitatively cutting out granular materials, particularly hard granular materials such as metal grains.

<Prior art and its problems> Conventionally, there has been no quantitative cutting method for soft materials such as powders and grains, hard materials with fine grains such as sand, or uniformly shaped materials such as medicines. Many technologies have been developed and are in practical use. However, there are few methods for quantitatively cutting out raw materials that are irregular in shape, hard, and have a larger particle size than powder, sand, etc., that are excellent in quantitative performance.

Description will be made by taking as an example a conventional technique related to quantitative cutting of hard metal particles (hereinafter simply referred to as "metal particles") with a relatively large particle size (for example, particle size of about 3 mm or more).

FIG. 6 is a partially sectional side view of a conventional quantitative cutting device 20, and FIG. 7 is a sectional view taken along the - line in FIG. As shown in these figures, the conventional powder material cutting-out device 20 has a hopper 2.
1, a casing 22, a rotor 23, and a drive device 15' for rotating the rotor 23.

An opening 210 is formed in the lower part of the hopper 21 and communicates with the upper part of the casing 22. On the other hand, a discharge port 220 for discharging the metal particles 17 is provided in the lower part of the casing 22 . Casing 22
A rotor 23 is rotatably housed inside the rotor 23, which is composed of four blades 24 formed symmetrically on all sides of a rotating shaft 26, and side plates 25, 25 provided on both sides of the blades 24. . The rotor 23 includes two adjacent blades 24, 24, side plates 125,
25 forms a space 27 into which a certain amount of metal particles 17 can be placed.

The rotating shaft 26 of the rotor is rotatably supported by bearings 13, 13, and is further connected via a coupling 14 to a drive device 15' that includes a transmission gear train, a power source, etc.
is connected to.

In the quantitative cutting device 20 having such a configuration, when the rotor 23 is rotated counterclockwise in the figure by the operation of the drive device 15', a portion of the metal particles 17 stored in the hopper 21 is moved into the opening 210.
When the metal particles 17 filling the space 27 quantitatively enter the space 27 located at the upper side of the rotor 23 and further rotate the rotor, the metal particles 17 filling the space 27 are discharged from the discharge port 2.
20, and quantitative cutting is performed.

However, such a conventional quantitative cutting device 20 has the following drawbacks.

When the rotor 23 rotates counterclockwise in the figure and the blades 24 pass through the edge part 28 at the lower end of the hopper, the hard metal grains 17 are caught between the tip of the blade 24 and the edge part 28, and the blade 24 ga etsuji part 2
8 or the rotor 23 may become unable to rotate. In this case, the material to be cut out is powder,
If the material is soft such as grains or sand, or if it is a fine powder, the above trouble will hardly occur.
Since the above-mentioned trouble often occurs with relatively large and hard materials such as metal particles, the quantitative cutting device having the above structure cannot be used for quantitative cutting of such materials.

Furthermore, since metal grains have a higher specific gravity than powders (food powder such as wheat flour, drug powder, etc.) or grain grains, the weight of the metal grains 17 in the hopper 21 is
Considering that the rotor 23 is applied to the rotating shaft 26 of the rotor through the rotor 10, the strength of the rotor 23 must be increased, that is, the size must be increased.

Also, when the weight of the metal grains 17 is applied, the rotor 2
Since the torque required to rotate the drive device 15' also increases, the output of the drive device 15' must also be increased, resulting in an increase in the size of the device and an increase in the manufacturing cost and running cost of the device.

By the way, as a device with an improved structure of the edge part of the quantitative cutting device 20, there is a device disclosed in Japanese Patent Application Laid-Open No. 58-2134.
There is a powder cutting device disclosed in the publication.

That is, this device includes a cutting chamber that is connected to the lower side of an upright rectangular container and has a bottom plate that can be opened and closed at the downward opening of the lower end, and a cutting chamber that can freely prevent powder and granular material from falling inside the container. A cylindrical or approximately semi-cylindrical shutter with an axis horizontally installed in the cutting chamber and a slit-like opening parallel to the axis at a predetermined position, and a reciprocating shaft at a predetermined angle around the axis. This apparatus is characterized in that it has a drive mechanism that provides rotation, and is capable of cutting out a quantity of powder in an airtight manner by synchronously driving the bottom plate of the cutting chamber and the shutter.

However, in this device, as shown in FIG. 6 of the above-mentioned publication, the pellet slitting action occurs between the seal 16 and the shutter 5, but at this time, the edge of the mouth portion 13 and the end face of the seal 18 The pellets get stuck and the cutting operation cannot be performed smoothly.

In addition, since the fully automatic operation of pellets 2 in the shaft furnace A is directly applied to the shutter 5, the strength of the shutter body, central shaft 11, bearing 12, etc. must be increased, which increases the size of the device and increases equipment costs. do. Furthermore, along with this, the torque required to be generated by the drive mechanism also increases, and the equipment cost and running cost of the drive mechanism also increase.

Therefore, even the invention described in Japanese Unexamined Patent Publication No. 58-2134 cannot fundamentally eliminate the drawbacks of the above-mentioned prior art.

<Purpose of the invention> The purpose of the invention is to eliminate the drawbacks of the prior art described above, to eliminate the problem of particulates getting caught, to enable smooth quantitative cutting of particulates, and to reduce the load on the rotor due to the weight of the particulates. An object of the present invention is to provide a device for quantitatively cutting out particulate matter, which can reduce the amount of granules and reduce the size and cost of the device.

<Structure of the invention> In order to achieve this purpose, the inventor of the present invention has conducted intensive research and found that the granules (metal particles) in the hopper
We have discovered a structure that prevents the rotor's own weight from directly applying to the rotor, and also ensures a space for the particulate matter to escape when the rotor scrapes the particulate matter, leading to the present invention.

That is, the present invention provides a hopper having a bottom plate provided substantially horizontally, a supply port for granular material provided directly above the bottom plate on a side surface of a lower end, means for adjusting the opening degree of the supply port, and A rotor is installed facing the rotor, and has a groove having a substantially fan-shaped cross section, and a rotor having an outer cylinder close to the end surface of the hopper bottom plate of the supply port in a portion other than the groove, and a rotor for storing the rotor, and a groove having a substantially fan-shaped cross section. a casing having a discharge port; and a drive means for rotating the rotor in reverse, and the drive means rotates the rotor to a position where the groove faces the supply port and granules are taken into the groove. The object of the present invention is to provide a device for quantitatively cutting out particulate matter, which is configured to rotate in the opposite direction to a position where the particulate matter in the groove is discharged to the discharge port.

In order to achieve the above-mentioned object, the present invention is based on the following technology.

In addition to setting the bottom plate of the hopper approximately horizontally,
An opening for supplying granules is installed directly above the bottom plate on the side of the lower end of the hopper, and adjacent to the side of this opening,
By installing the rotors facing each other, the weight of the granules in the hopper is not applied directly to the rotors.

A means (for example, an adjustment gate having an adjustment plate) for controlling the amount of granular material supplied by adjusting the opening degree of the opening is installed in the opening of the hopper.

The particulate matter naturally flows out from the opening adjusted to a predetermined opening degree by the adjustment gate, etc., and is deposited in the groove that is the scooping part of the rotor at a state close to the angle of repose, and the particulate matter is deposited near the top of the opening. By forming a space for objects to escape, particulate objects are prevented from being caught during the scooping operation of the rotor.

When the granules are cut out by the rotation of the rotor, the rotor is skimmed to prevent the granules from flowing out randomly from the opening of the hopper and to maintain the quantitative quality of the amount cut out during the next cutting. Preferably, an outer cylinder having a cylindrical surface is formed in a portion other than the groove (groove), and the structure is such that this outer cylinder covers the opening.

Below, the device for quantitatively cutting out granular materials of the present invention is described below.
Reference will now be made in detail to preferred embodiments illustrated in the accompanying drawings.

FIG. 1 is a partial cross-sectional side view of the device for quantitatively cutting out particulate matter according to the present invention, and FIG. 2 is a -
The cross-sectional view along the line, FIG. 3, is - in FIG. 1.
FIG. As shown in these figures, the device 1 for quantitatively cutting out granular materials includes a hopper 2 that stores granular materials 17 such as metal grains having a diameter of 2 to 3 mm, and has a supply port 3 on the side surface of the lower end thereof; a casing 11 that communicates with the hopper 2 via the supply port 3 and has a discharge port 12 for the granular material 17; a rotor 5 that is rotatably (oscillatably) housed in a predetermined position within the casing 11; It is constituted by a driving means 15 that rotates the rotor 5 in reverse at a predetermined timing.

The hopper 2 has a capacity capable of storing a predetermined amount of granular material 17, and the bottom plate 2' is provided approximately horizontally, and the particulate material is cut out (supplied) directly above the bottom plate 2' on the side surface of the lower end. A supply port 3 is formed.

This supply port 3 is provided with means for adjusting its opening degree, so that the amount of cut-out particulate matter 17 can be controlled.

That is, as shown in FIG.
2 is slidably attached to the side of the hopper 2, and by adjusting the height h of the supply port 3, the opening area of the supply port 3 h x i (h: height of the supply port,
i: Width of the supply port) can be adjusted.

A rotor 5 rotatably installed within the casing 11 has a groove 6 that scoops out particulate matter 17. As shown in FIG. 4, this groove 6 is limited by two blades 8a, 8b installed with a predetermined opening angle α and side plates 7, 7 installed on both sides of the rotor, and its traverse The shape of the surface is approximately fan-shaped with an opening angle α, as shown in FIG. Note that α is appropriately determined depending on the intended cutting amount per time, and is preferably set to, for example, approximately 90 to 135°.

On the other hand, an outer cylinder 9 forming a cylindrical surface is formed in a portion of the rotor 5 other than where the groove 6 is formed.

When the rotor 5 rotates to the state shown in FIG. 5c when the granular material 17 is cut out, the outer cylinder 9 blocks the supply port 3 and the granular material 17 flows out from the supply port 3 in a disorderly manner. This has the effect of preventing this and maintaining quantitative performance during the next cutting.

Such a rotor 5 is installed facing the supply port 3, and as shown in FIG. 1, a space 16 for escape of particulate matter is formed near the upper edge of the supply port 3, that is, the lower end of the adjustment plate 4. Therefore, no particulate matter is caught between the tip of the rotor blade 8a and the lower end of the adjustment plate 4 during cutting.

A rotating shaft 10 is formed at the center of the rotor 5,
As shown in FIG. 2, both ends of the rotating shaft 10 are connected to bearings 1
3 and 13, and one end of the rotating shaft 10 is connected to a drive device 15 via a joint 14.

The drive device 15 includes a power source such as a motor or an engine, a speed change gear train, a reversing mechanism for changing the direction of rotation of the rotor 5, a control device for controlling the operation of the device, and the like.

The casing 11 is provided to prevent the granules from scattering when the granules 17 are cut out, and below the casing 11 is a discharge port 1 for discharging the granules.
2 is formed.

In addition, in the present invention, the granules to be cut out are not limited to metal particles, but can be applied to granules and powders of all kinds, particle sizes, and hardnesses.

<Operation of the invention> The operation of the quantitative cutting device of the invention will be explained below.

Figures 5a to 5d are diagrammatic cross-sectional side views showing changes over time in the operation of the quantitative cutting device 1 of the present invention.

Note that in these figures, the portion of the rotor 5 covered by the outer cylinder 9 is shown with a sloped surface for easy understanding. This sloped portion is called the outer cylinder portion 9.

First, as shown in FIG. 5a, the rotor 5 is stopped at a position where the outer cylindrical portion 9 of the rotor 5 shields the supply port 3, which has been adjusted to a predetermined opening degree by the adjustment plate 4, and Fill with granules. Since the supply port 3 is shielded by the outer cylindrical portion 9, the particulate matter 17 does not flow out from the supply port 3.

Next, as shown in FIG. 5b, the rotor 5 is rotated clockwise in the figure by the operation of the drive device 15, so that the rotor groove 6 is continuous with the supply port 3, that is, the rotor blade 8a is located at the hopper. Stop at a position that matches the bottom of No. 2 (approximately horizontal).

In this state, a predetermined amount of particulate matter 17 flows into the groove 6 of the rotor from the supply port 3 whose opening degree is adjusted to a predetermined degree.

At this time, the particulate matter 17 that has flowed into the groove 6 is
As shown in FIG. 5B, the deposition state is close to the corner of repose, and the amount of the granules 17 to be cut out is determined in conjunction with the scooping operation of the granules 17 by the groove portion 6 in the next step shown in FIG. 5C.

In addition, in the quantitative cutting device 1 of the present invention, since the granules 17 flow into the groove 6 from the supply port 3 provided on the side surface of the lower end of the hopper 2, the load applied to the rotor 5 is equal to the amount that flows into the groove. The weight of the granules 17 is only the weight of the granules 17, and all the granules 17 in the hopper are
The weight of the rotor is not applied directly to the rotor.

Next, as shown in FIG. 5c, the drive device 15 is operated to rotate the rotor 5 counterclockwise in the figure to scoop out the particulate matter 17 in the groove 6.

Since a space 16 is formed near the lower end of the adjustment plate 4 through which particulate matter can escape, the tips of the rotor blades 8a and the adjustment plate 4 are
The granules 17 will not be caught between the lower ends of the .

Furthermore, in this state, the supply port 3 is shielded by the outer cylindrical portion 9 as described above, so that the particulate matter 17 does not flow out from the supply port 3 in a disorderly manner.

When the rotor 5 is further rotated counterclockwise from the state shown in FIG. 5c, as shown in FIG. 5d,
The particulate matter 17 in the groove 6 falls out from the groove 6 and is discharged from the outlet 1.
It is discharged from 2.

With the above operations, one quantitative cutout is completed. For the second and subsequent cuttings, the rotor 5 may be returned from the state shown in FIG. 5d to the state shown in FIG. 5b, and the above-described operation may be repeated.

<Example> Using a device for quantitatively cutting out granular material having the structure shown in Figs. 1 to 3, the height h of the supply port was variously changed to perform quantitative cutting of metal particles with a particle size of about 5 to 7 mm. Ivy.

The relationship between the height of the supply port and the amount of cutout per time was investigated. The results are shown in the graph of FIG.

The dimensions of the quantitative cutting device used are as follows.

Width of supply port i = 10cm Height of supply port h = 5~9cm Rotor diameter (outer diameter) = 15cm Rotor width = 10cm Opening angle of rotor groove α = 135° As can be seen from the graph in Figure 8 It can be seen that the cutting amount increases linearly in proportion to the height h of the supply port (area of the supply port), indicating that the quantitative cutting performance of the device of the present invention is excellent.

Further, when cutting out a fixed amount using the device of the present invention, there was no problem of metal particles getting caught between the rotor and the adjustment plate, and smooth cutting was performed. Moreover, the rotor was not subjected to any load due to the weight of the metal grains in the hopper, and the drive device could be driven at low output.

<Effects of the invention> According to the device for quantitatively cutting out granular materials of the present invention,
Even granules, especially metal particles, which have a relatively large particle size (for example, 3 mm or more) and have high hardness,
Smooth cutting can be performed without causing any jamming, and cutting can be performed with excellent quantitativeness of the cutting amount.

In addition, unlike conventional equipment, the weight of the granules in the hopper is not applied to the rotor, so it is possible to reduce the size of the rotor, etc. in the design, contributing to the downsizing of the equipment, reducing equipment costs, and driving the rotor. Running costs can be reduced by reducing the output required.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing a preferred example of a device for cutting out a granular material in a quantitative manner according to the present invention. FIG. 2 is a sectional view taken along the - line in FIG. 1.
FIG. 3 is a sectional view taken along the - line in FIG. 1. FIG. 4 is a perspective view of a rotor used in the device of the present invention. Figures 5a to 5d are diagrammatic cross-sectional side views showing the operation of the quantitative cutting device of the present invention. FIG. 6 is a partially sectional side view of a conventional quantitative cutting device. FIG. 7 is a sectional view taken along the - line in FIG. 6. FIG. 8 is a graph showing the relationship between the height of the supply port and the amount of metal particles cut out per one time when metal particles are cut out in a fixed amount using the apparatus of the present invention in an example. Explanation of symbols, 1... Device for quantitatively cutting out granular material, 2... Hopper, 3... Supply port, 4... Adjustment plate, 41... Long hole, 42... Bolt/nut, 5
...Rotor, 6...Groove, 7...Side plate, 8a, 8
b...Blade, 9...Outer tube, 10...Rotating shaft, 11
... Casing, 12 ... Discharge port, 13 ... Bearing, 14 ... Joint, 15, 15' ... Drive device,
16...Space, 17...Particles (metal grains), 20
... Conventional quantitative cutting device, 21 ... hopper, 210 ... opening, 220 ... discharge port, 22 ...
...Casing, 23...Rotor, 24...Blade, 25...Side plate, 26...Rotating shaft, 27...Space, 28...Edge portion.

Claims (1)

[Claims for Utility Model Registration] A hopper having a bottom plate provided substantially horizontally and a supply port for granular material provided directly above the bottom plate on the side surface of its lower end; means for adjusting the opening degree of the supply port; a rotor that is installed facing the supply port and has a groove having a substantially fan-shaped cross section, and has an outer cylinder in a portion other than the groove portion that is close to the end surface of the hopper bottom plate of the supply port; a casing having a material discharge port; and a driving means for reversing and rotating the rotor, the driving means driving the rotor to a position where the groove faces the supply port and the particulate material is taken into the groove. A device for quantitatively cutting out particulate matter, the device being configured to rotate in the opposite direction to a position where the particulate matter in the groove is discharged to the discharge port.