JP4242547B2 - Powder and granular quantity supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder and substance quantitative supply apparatus using a roll feeder.
[0002]
[Prior art]
Conventionally, gate feeders, screw feeders, vibration feeders, roll feeders, and the like are known as powder and granular material supply devices.
[0003]
The applicant of the present application is a powder capable of precise quantification using a feed roll as a device that smoothly performs continuous quantification supply of powder particles with different diameter particles previously at the target value set in the continuous system process. Developed a granule quantitative supply device and received a utility model registration (Japanese Utility Model Publication No. 53-6221).
[0004]
That is, the powder quantitative supply apparatus according to the proposal includes a feed roll having a frictional peripheral surface with a supply material such as a powder, and a control gate that forms a flow passage for the supply material between the feed roll and the feed roll. A hopper and a chute for guiding the feed material by an inclined bottom surface that is equal to or greater than the rest angle of the feed material, and the control gate has a length from the center of the feed roll having the radius a to the center of the control gate having the radius b, When the angle of the control gate is α, it is constituted by a semicircular gate having a gate opening h obtained by a predetermined arithmetic expression. The calculation formula for the gate opening degree h is as follows.
h = L−b cos α−√ [a ² − (b sin α) ² ]
[0005]
The powder and granular fixed amount supply device having such a configuration is such that the powder roll contact surface of the feed roll is specially processed, and a control gate capable of stepless adjustment is attached thereto, and the opening degree of the control gate and the rotation of the feed roll By changing the number, it is possible to change the supply capacity of the granular material, and not only the resin pellets and grains, but also the granulated products that are easy to collapse can be supplied and discharged almost as they are in their original form. I have.
[0006]
[Problems to be solved by the invention]
However, in various industrial fields today, the types of powders handled tend to increase more and more, so the demand for powder quantitative supply devices for quantitatively supplying these powders also tends to increase. is there. However, in this type of powder and granular quantitative supply device, the properties of the powder and the properties such as fluidity, cohesiveness, and wearability are changed in particular in the case of fine powder or ultrafine powder. Therefore, there is a need for a powder and granular quantitative supply device having versatility that can appropriately respond to the quantitative supply of powder having various properties.
[0007]
Accordingly, as a result of intensive studies and trial productions, the present inventors are suitable for preventing slip of the granular material along the predetermined width suitable for supplying the granular material on the outer peripheral surface of the feed roll. In addition to providing a knurled or surface-treated granular material transfer zone with a concave-convex shape and a control gate formed in a flat plate shape, the opening can be adjusted with respect to the feed roll. Thus, in handling the granular material having various property changes, the supply capacity can be appropriately changed by adjusting the opening degree by the control gate and adjusting the rotation speed of the feed roll, and the granular material Is obtained on a concavo-convex shape surface of a predetermined width set on the feed roll with a constant thickness and can be supplied and discharged smoothly and accurately. Found out Rukoto.
[0008]
In addition, with respect to the granular material transport zone formed on the outer peripheral surface of the feed roll, the scraper is positioned so that the front end edge thereof is substantially in contact with the granular material transport zone, directed obliquely from below. The scraper is introduced into the discharge chute while scraping off the powder particles on the powder particle transport zone, whereby the supply and discharge of the powder particles can be achieved more appropriately and reliably.
[0009]
Furthermore, in the granular material quantitative supply device having the above-described configuration, the range of the granular material supply capacity is determined by setting the width of the bottom opening of the hopper to the axial length of the feed roll (that is, the granular material transport zone of the feed roll). Therefore, if the maximum width of the feed roll is set to the maximum supply width of the granular material, an appropriate opening width adjusting mechanism is provided at the bottom opening of the hopper to reduce the width of the bottom opening. By making it adjustable so that it can be reduced or enlarged, the supply width (supply amount) of the granular material to the feed roll can be changed.
[0010]
On the other hand, in handling the granular material that tends to cause a cross-linking phenomenon in the above-mentioned powder granular supply device, by providing a cross-linking prevention mechanism such as a stirring blade in the hopper, the feed roll has a uniform bulk density. A stable supply and discharge of the granular material can be achieved.
[0011]
And, the various powder particles in the hopper are easily discharged because the entire amount is smoothly discharged without slipping by the uneven shape of the powder particle transfer zone formed on the outer peripheral surface of the feed roll, Advantages such as the ability to change the type of the granular material to be handled in a short time and the stable operation over a long time even during continuous operation can be obtained.
[0012]
Therefore, the object of the present invention is to adjust the supply amount in advance for all types of powder and to smoothly discharge the entire amount in an appropriate state without slipping. An object of the present invention is to provide an apparatus for quantitatively supplying a granular material capable of supplying a granular material having a uniform width continuously and stably over a long time.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the powder and granular fixed amount supply device according to claim 1 of the present invention continuously feeds the powder and granular material stored in the hopper to a feed roll that rotationally drives the powder according to a preset supply amount. A knurl or surface suitable for stable supply and prevention of slipping of the granular material on the outer peripheral surface of the feed roll while being configured to transfer and supply and continuously discharge a predetermined amount of granular material through the discharge chute A granular material transport zone in which uneven shapes are engraved with a predetermined width by processing is provided, and a granular material having a feed roll at the tip edge at the bottom opening of the hopper directed to the granular material transport zone at the top of the feed roll provided with a plate-shaped control gate that is positioned to close to the transfer zone, the while scraping the tip edges of the granular material supplied to the particulate material transporting band of the feed roll In granular material dispensing device formed by providing a scraper to be introduced into the output chute,
The flat control gate has an opening adjusting main shaft that pivotally supports the base so that the opening can be adjusted by reversible turning with respect to the rotation direction of the feed roll, and one end of the opening adjusting main shaft. An opening adjustment operation member formed by gearing a rotation operation knob via a worm gear shaft, a protrusion piece that can pivot integrally with the opening adjustment main shaft at the other end of the opening adjustment main shaft, An opening degree limiting member formed by fixedly arranging a pair of stoppers for limiting the rotation range of the opening adjustment main shaft with respect to the protrusion piece turning method, and adjusting the rotational speed of the feed roll Configure to adjust the opening by the control gate,
Further, on the bottom opening side of the hopper, a pair of symmetrically arranged opening / closing plates each having an adjustable opening / closing angle, and these opening / closing plates are set so as to be able to move forward and backward from the outside of the hopper. A wide opening powder adjusting mechanism configured to adjust an opening width of the bottom opening of the hopper with respect to a width direction of the feed roll. Constructed to accommodate the granular transport bandwidth ,
The scraper has a flat plate shape and is directed in a tangential direction from obliquely below to the granular material transport zone on the side from the top to the bottom due to the rotation of the feed roll, and the tip edge thereof is transported to the granular material. The powder particles positioned so as to be substantially in contact with the band and scraped off at the front edge thereof are arranged so as to reach the discharge chute through the upper surface of the scraper .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the powder and granular constant supply device according to the present invention will be described in detail with reference to the accompanying drawings.
[0018]
FIG. 1 and FIG. 2 show an embodiment of a powder and granular constant supply device according to the present invention. 1 and 2, reference numeral 10 is a hopper, 12 is a feed roll, 14 is a discharge chute, and 20 is a support housing that supports the entire apparatus.
[0019]
However, the feed roll 12 is configured to continuously transfer and supply the granular material stored in the hopper 10 and to continuously discharge a predetermined amount of granular material through the discharge chute 14. Therefore, in the feed roll 12 of the present embodiment, the granular material transport zone 12a in which the concavo-convex shape is engraved with a predetermined width w by knurling or surface treatment suitable for the stable supply of the granular material and slip prevention on the outer peripheral surface thereof. Is provided.
[0020]
The upper part of the feed roll 12 thus configured is located at the bottom opening 10a of the hopper 10, and the tip edge 16a of the bottom opening 10a of the hopper 10 is close to the granular material transport zone 12a. A control gate 16 having a flat plate shape is provided, and the control gate 16 is configured so as to be reversibly swivel with respect to the rotation direction of the feed roll 12 (see the arrow in FIG. 1). The opening degree h for supplying the granular material is configured to be adjustable.
[0021]
Therefore, in the present embodiment, the opening adjusting means 17 of the control gate 16 includes a rotatable opening adjusting main shaft 17a, an opening adjusting operation member 18, and an opening limiting member 19. That is, the base of the control gate 16 is coupled and fixed to a part of the opening adjustment main shaft 17a [see FIG. 2 (a)], and an opening adjustment operation is performed at one end of the opening adjustment main shaft 17a. A member 18 is provided (see FIG. 2B), and an opening restriction member 19 is provided at the other end of the opening adjusting main shaft 17a (see FIG. 2C).
[0022]
As shown in FIG. 2B, the opening adjustment operation member 18 includes a rotation operation knob 18a and a worm gear shaft 18b coaxially coupled to the rotation operation knob 18a. It is configured to mesh with a gear portion formed at one end of the opening adjustment main shaft 17a. Therefore, by rotating the rotary operation knob 18a in a certain direction, the opening adjustment main shaft 17a can be rotated and the control gate 16 can be rotated to perform a required opening adjustment.
[0023]
On the other hand, as shown in FIG. 2 (c), the opening restriction member 19 includes a protrusion piece 19a that is turnably coupled to the other end of the opening adjustment main shaft 17a, and a turning direction of the protrusion piece 19a. It is comprised from a pair of stopper 19b, 19b fixedly arranged with respect to. Therefore, when the opening adjustment is performed by the opening adjustment operating member 18, the rotation range of the opening adjustment main shaft 17a can be limited by the action of the turning protrusion piece 19a and the stoppers 19b and 19b. Thereby, the extreme opening degree adjustment of the control gate 16 can be regulated.
[0024]
Furthermore, in this embodiment, as shown in an enlarged view in FIG. 3 and FIG. 4, with respect to the granular material transport zone 12 a formed on the outer peripheral surface of the feed roll 12, directed obliquely from below and tangentially, A scraper 15 is provided that is positioned so that the tip edge portion 15a is substantially in contact with the granular material transport zone 12a. Then, the rear end portion 15b of the scraper 15 is arranged to be directed to the discharge chute 14.
[0025]
The constituent members of the powder quantitative supply apparatus of the present embodiment having the above-described configuration, that is, the hopper 10, the feed roll 12, the discharge chute 14, the scraper 15, and the control gate 16 are respectively coupled and supported by the support housing 20. The In addition, an electric motor 22 is fixedly arranged in a part of the support housing 20, and the power of the electric motor 22 is coupled to one end of the support shaft 13 of the feed roll 12 with respect to a sprocket or pulley 23 a. The feed roll 12 is appropriately rotated via a chain or belt 23b and is driven to rotate at a required rotational speed n.
[0026]
In the granular material quantitative supply device of the present embodiment configured as described above, by adjusting the opening degree h by the control gate 16 and adjusting the rotational speed n of the feed roll 12, the handling granular material Due to the supply ability according to the properties, the granular material can be supplied and discharged smoothly and accurately.
[0027]
Moreover, in the granular material fixed amount supply apparatus of this invention, the width | variety of the bottom part opening part 10a of the hopper 10 and the length of the axial direction of the feed roll 12 (width | variety of the granular material transfer zone 12a of the feed roll 12) are set. The maximum width, that is, the maximum supply width of the granular material is set, and the opening width adjusting mechanism 26 is appropriately provided on the bottom opening 10a side of the hopper 10 so as to be wide within the range of the maximum supply width w ′. It can set so that the supply width | variety of the granular material with respect to feed roll 12 'may be changed (refer FIG. 5).
[0028]
In this case, as shown in FIG. 5, corresponding to the wide feed roll 12 ', the control gate and the opening adjustment means are also configured as a wide control gate 16' and a wide opening adjustment means 17 ', respectively. Is done. When the maximum feed width w ′ of the granular material transfer zone 12 a is variably set for the wide feed roll 12 ′, the opening width adjusting mechanism 26 is placed on the bottom opening 10 a side of the hopper 10. A pair of symmetrically arranged opening and closing plates 27 and 27 configured so that the opening and closing angles can be freely adjusted respectively, and the opening and closing plates 27 and 27 can be moved forward and backward from the outside of the hopper 10 and can be positioned. The opening width can be adjusted by providing the drive operation means 28 and 28 composed of a feed screw mechanism or the like. In this case, if the end portions of the open / close plates 27, 27 are made to be, for example, a double plate or multiple plate structure that can be stretched so that the end portions of the open / close plates 27, 27 are always close to the feed roll 12 '. Is preferred.
[0029]
As an alternative, the opening width adjusting mechanism 26 has a structure in which, for example, the entire side plates of the hopper 10 facing each other in the width direction of the feed roll 12 ′ are slid in the horizontal direction as they are and approached and separated. Thus, the opening width can be configured to be displaceable. Although not shown, the scraper 13 and the discharge chute 14 shown in FIGS. 3 and 4 are respectively the same as the wide control gate 16 'and the wide opening adjusting means 17'. What is necessary is just to attach the thing comprised widely so that it may respond | correspond with roll 12 '.
[0030]
Furthermore, in the granular material quantitative supply device of the present embodiment, when handling the granular material that is likely to cause a crosslinking phenomenon, the feed roll 12 is uniformly provided by providing a crosslinking prevention mechanism such as a stirring blade 24 in the hopper 10. It is possible to achieve stable supply and discharge of the granular material with a high bulk density (see FIGS. 1 and 2A).
[0031]
Note that in the granule dispensing apparatus of the present embodiment, with respect to particulate material transfer band 12a formed on the outer peripheral surface of the feed roll 12, for example, a scraper 15 to the bottom opening 10a of the back hopper 10 from the provided position In the outer periphery, a conventionally known guide cover is extended to be supplied to the granular material transfer zone 12a of the feed roll 12, and guides the residual of the granular material that could not be completely scraped off by the scraper 15. And it can comprise so that it may re-feed to the granular material transfer zone 12a of the feed roll 12 sequentially.
[0032]
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and many design changes can be made without departing from the spirit of the present invention.
[0033]
【The invention's effect】
As is clear from the above-described embodiment, the powder and granular fixed amount supply device according to the present invention can continuously transfer and supply the powder stored in the hopper and continuously discharge a predetermined amount of powder and particles. it can. In addition, at the bottom opening of the hopper directed to the granular material transfer zone at the top of the feed roll, there is provided a flat control gate positioned so that the front edge thereof is close to the granular material transfer zone of the feed roll. Since the opening degree can be adjusted by reversing the rotation of the feed roll with respect to the rotation direction of the feed roll, it is possible to always stably and continuously discharge the granular material having a uniform thickness. Moreover, by adjusting the opening by the control gate and adjusting the rotation speed of the feed roll, the powder can be supplied and discharged smoothly and accurately according to the properties of the powder handled. .
Furthermore, in the granular material quantitative supply device according to the present invention, the maximum width of the feed roll is set to be the maximum supply width of the granular material, and an appropriate opening width adjustment mechanism is provided at the bottom opening of the hopper, By making it adjustable so that the width of the bottom opening can be reduced or enlarged, the supply width (supply amount) of the powder particles to the feed roll can be changed. In particular, in the present invention, a flat control gate is provided, and an opening adjusting main shaft is provided to pivotally support the base so that the opening can be adjusted by reversible turning with respect to the rotation direction of the feed roll. An opening adjustment member is provided at one end of the degree adjustment main shaft, and a rotation operation knob is gear-coupled via a worm gear shaft, and the other end of the opening adjustment main shaft is integrated with the opening adjustment main shaft. Provided with an opening restricting member formed by fixedly arranging a pair of stoppers for restricting the rotation range of the opening adjusting main shaft with respect to the turning direction of the protruding piece. By this, the outstanding advantage that adjustment with respect to the change of the supply width | variety (supply amount) of the granular material with respect to the feed roll mentioned above can be performed simply is acquired.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view showing an embodiment of a powder and granular material supply device according to the present invention.
2 (a) is a partial cross-sectional front view of the granular material quantitative supply device in FIG. 1, and FIG. 2 (b) is an opening adjustment means of a control gate in the granular material quantitative supply device shown in FIG. The principal part cross-sectional side view seen from (c) is the principal part cross-sectional side view which looked at the opening adjustment means of the control gate in the granular material fixed quantity supply apparatus shown to (a) from the C direction.
3 is an enlarged cross-sectional side view of a main part showing a coupling portion between a feed roll and a discharge chute of the powder and granular fixed amount supply device in FIG. 1;
FIG. 4 is an enlarged front view of a main part showing a coupling portion between a feed roll and a discharge chute of the powder and granular constant supply device in FIG.
FIG. 5 is a partial cross-sectional front view of a powder quantitative supply apparatus similar to FIG. 2 (a) showing another embodiment of the powder quantitative supply apparatus according to the present invention using a wide feed roll. is there.
[Explanation of symbols]
10 ... Hopper,
10a ... bottom opening,
12 ... feed roll,
12 '... wide feed roll,
12a ... granular material transfer zone,
13 ... Feed roll support shaft,
14 ... discharge chute,
15 ... scraper,
15a ... the edge of the tip,
15b ... rear end,
16 ... Control gate,
16 '... wide control gate,
16a ... tip edge,
17 ... Opening adjustment means,
17 '... Wide opening adjustment means,
17a ... opening adjustment spindle,
18 ... Opening adjustment operation member,
18a: rotary operation knob,
18b ... Worm gear shaft,
19: Opening restriction member,
19a ... turning protrusion,
19b ... stopper,
20: Support housing,
22 ... Electric motor,
23a ... sprocket,
23b ... chain,
24 ... stirring blade,
26 ... opening width adjusting mechanism,
27 ... Opening and closing plate,
28: Driving operation means,
w ... powder transport bandwidth ,
w '... Wide powder transport bandwidth

Claims (1)

The granular material stored in the hopper (10) is continuously transferred and supplied to a feed roll (12) that is rotationally driven according to a preset supply amount, and a predetermined amount of granular material is supplied via the discharge chute (14). In addition to a continuous discharge, the outer surface of the feed roll has a knurled shape or surface treatment suitable for stable supply of powder and slip prevention, and a concavo-convex shape with a predetermined width (w). A granule transport zone (12a) is provided so that the tip edge is close to the powder transport zone of the feed roll at the bottom opening (10a) of the hopper directed to the powder transport zone at the top of the feed roll. provided with a positioning the plate-shaped control gate (16) to the exhaust while scraping the granules supplied to the particulate material transporting band of the feed roll by the leading edge (15a) In granular material dispensing device formed by providing a scraper (15) to be introduced into the chute,
The flat control gate (16) has an opening adjustment main shaft (17a) that pivotally supports the base so that the opening can be adjusted by reversible turning with respect to the rotation direction of the feed roll, and the opening adjustment. An opening adjusting operation member (18) formed by gear-connecting a rotary operation knob (18a) to one end of the main shaft through a worm gear shaft (18b), and the opening at the other end of the opening adjusting main shaft. A protrusion piece (19a) that can turn integrally with the adjustment main shaft, and a pair of stoppers (19b, 19b) for restricting the rotation range of the opening adjustment main shaft with respect to the method of turning the protrusion piece. A fixed opening degree opening member (19), and configured to adjust the opening degree by the control gate together with the adjustment of the rotation speed of the feed roll,
Furthermore, on the bottom opening side of the hopper, a pair of symmetrically arranged opening and closing plates (27, 27) each having an adjustable opening and closing angle, and these opening and closing plates can be moved forward and backward from the outside of the hopper. An opening width adjusting mechanism (28, 28) comprising a feed screw mechanism set to be positionable and configured to be able to adjust the opening width in the width direction of the feed roll at the bottom opening of the hopper. 26), and configured to correspond to the wide granular material transfer bandwidth (w ′) in the feed roll ,
The scraper has a flat plate shape and is directed in a tangential direction from obliquely below to the granular material transport zone on the side from the top to the bottom due to the rotation of the feed roll, and the tip edge thereof is transported to the granular material. The granular material quantitative supply characterized in that the granular material positioned so as to be substantially in contact with the zone and scraped off at the edge of the tip end is disposed so as to reach the discharge chute through the upper surface of the scraper. apparatus.

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