JP2015081180A - Constant feeding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constant feeding machine which can realize a constant feeding of a material with a high accuracy without occurrence of pulsation even if the material is a small piece-like material.SOLUTION: A constant feeding machine is so configured that an inner cylinder 5 is connected to an upper part of a cylindrical casing, a machine casing 6 is fixed between opposite inner peripheral surfaces of the cylindrical casing below a lower end of the inner cylinder, a circular bottom board 7 is fixed onto a midship part of the machine casing, an upright rotary shaft 8 is provided on the circular bottom board, plural rotary vanes 9 are provided on the upright rotary shaft, an electric motor 10 for rotationally driving the upright rotary shaft is provided, a material discharge clearance t1 is formed between the lower end of the inner cylinder and the circular bottom board, a material falling space S1 is formed between an outer peripheral edge of the circular bottom board and the inner peripheral surface of the cylindrical casing, a vibration hopper 14 of an inverse conical shape is supported on a lower part of the cylindrical casing, and a material, which is fallen and supplied onto the vibration hopper via the material discharge clearance and the material falling space by rotation of the rotary vanes, can be quantitatively discharged from a discharge port 14' via the vibration hopper.

Description

  The present invention relates to a quantitative feeder using a vibration hopper for quantitatively feeding materials such as wood chips, wood pellets, and waste plastics with high accuracy.

  Conventionally, as an apparatus for quantitatively supplying powder and the like, it is formed by an outer cylinder sharing a center line and two upper and lower inner cylinders, and the upper and lower inner cylinders are connected by an upper annular plate, and the lower outer cylinder The lower inner cylinder is connected to the lower inner cylinder with a lower annular plate, a material passage is formed below the outer periphery of the circular table that closes the upper end of the lower inner cylinder, and the material is discharged between the outer periphery of the table and the lower end of the upper inner cylinder A plurality of rotating blades are provided on an upright rotating shaft protruding from the center of the table with a gap interposed therebetween, and the tip of the rotating blade is connected to the rotating ring disposed in the material passage with a metal fitting, and the rotating ring is connected to the rotating ring. There has been proposed a powder and particle feeder that is provided with a scraper located in the material passage (Patent Document 1).

  In this feeder, the granular material moves outward on the table by the rotation of the rotary blade, falls from the table into the material passage, is guided by the scraper in the material passage, and is discharged out of the passage from the material discharge port. It is the composition which is done.

  Also, a hopper is installed in the lower part of the tank, and the hopper is finely reciprocated, thereby supplying a material such as a granular material from the lower end of the hopper (Patent Document 2). A supply device (Patent Document 3) has been proposed in which a linear vibration conveyor is installed at the lower end and a material such as powder particles falling from the hopper is supplied in a fixed amount via the vibration conveyor.

JP 2003-335422 A JP 2000-255789 A JP 2000-38219 A

  In the supply device of the above-mentioned Patent Document 1, irregular or string-like industrial waste, such as waste plastic and waste rubber, is guided from the table to the material passage and is discharged to the material discharge port while being unraveled by the scraper in the passage. It can be transported smoothly, and a highly accurate quantitative supply can be realized.

  By the way, a small piece of material having a length of, for example, several tens of mm to 150 mm, such as a wood chip and a wood pellet, is discharged from the material discharge port when guided by the plurality of scrapers. In some cases, pulsation may occur in the supplied material, and quantitative supply with higher supply accuracy is desired.

  On the other hand, in the supply device of Patent Document 2, since the supply material is directly supplied from the tank to the vibration hopper, for example, when the material such as the wood chip is agglomerated and falls to the hopper, the inside of the agglomerated material Since there are multiple spaces (voids) between the materials, the vibrations of the hopper are difficult to be transmitted to the individual wood chips that are clumped by these spaces, and as a result, they may be discharged in the lump shape. There is a risk of hindering quantitative supply.

  Moreover, in the supply apparatus of patent document 3, when the pulsation arises in the material supplied to the vibration conveyor from the hopper, the said pulsation cannot be eliminated with the vibration conveyor, and there is a possibility that the quantitative supply accuracy may be lowered.

  The present invention has been made in view of the problems of the above-described conventional apparatus. By using a rotary blade for discharging materials and a vibration hopper in combination, even if it is a small piece of material such as a wood pellet, it is pulsating. It is an object of the present invention to provide a quantitative feeder using a vibration hopper that can realize a quantitative feed with high accuracy without causing any problems.

  It is another object of the present invention to provide a quantitative feeder having a configuration capable of protecting a drive system such as an electric motor from dust and the like accompanying material supply.

  It is another object of the present invention to provide a quantitative feeder capable of smoothly cooling a drive system such as an electric motor.

  Moreover, it aims at providing the fixed quantity feeder which can perform maintenance etc. of an apparatus smoothly.

In order to achieve the above object, the present invention
First, an annular plate sharing the central axis with the cylindrical casing is connected to the upper portion of the cylindrical casing, an inner cylinder sharing the central axis is connected to the inner peripheral edge of the annular plate, and lower than the lower end of the inner cylinder A machine frame is fixed between the opposed inner peripheral surfaces of the cylindrical casing, a circular bottom plate sharing the central axis is fixed to the upper side of the central portion of the machine frame, and an upright rotating shaft is placed on the central axis of the circular bottom plate. A plurality of rotary blades are provided radially on the upright rotating shaft on the upper surface side of the circular bottom plate, and a drive unit for rotating the upright rotating shaft is provided on the lower side of the circular bottom plate, An annular material discharge gap is formed between the upper surface of the circular bottom plate and an annular material fall space is formed between the outer peripheral edge of the circular bottom plate and the inner peripheral surface of the cylindrical casing. While sharing the central axis, A vibration hopper for supporting the inverted conical vibration hopper located below the material dropping space and for vibrating the vibration hopper, and by rotating the rotary blade, the material discharge gap is formed from the upper surface of the circular bottom plate. And a fixed quantity feeder that is configured so that the material dropped onto the vibration hopper via the material drop space can be discharged from the discharge port below the vibration hopper via the vibration hopper. The

  The said cylindrical casing can be comprised by a drive part support cylinder (1) and an outer cylinder (3). The annular plate can be constituted by, for example, an annular upper lid (4). The inner peripheral edge can be constituted by an annular inner peripheral opening (4a). The machine frame can be constituted by, for example, a lattice-like support machine frame (6) constituted by fixed plates (6a to 6d) and an enclosure machine frame (6 ') at the center thereof. The driving machine can be constituted by, for example, a reduction gear (10 ') and an electric motor (10) connected to an upright rotating shaft. The said vibrator can be comprised by a vibrator (25), for example. With this configuration, when a material is put into the cylindrical casing from the inner cylinder, the material is stored on the circular bottom plate and flows out from the material discharge gap at the lower end of the inner cylinder toward the outer periphery at a predetermined angle of repose. When the rotating blades are rotated, the material on the circular bottom plate moves in the outer circumferential direction of the circular bottom plate as the rotating blades rotate, and the material falling space is formed almost uniformly from the entire periphery of the circular bottom plate without causing lumps. It will fall down through. The material dropped from the material drop space falls on the vibration hopper, is smoothly guided downward by the vibration of the vibration hopper, and can be discharged quantitatively without causing pulsation from the discharge port of the hopper.

  Secondly, the machine frame includes a surrounding machine frame surrounding the upright rotating shaft at the center thereof, and an upper opening of the surrounding machine frame is closed by the circular bottom plate, and the surrounding machine frame A dust-proof cover that covers the drive unit is provided in a hermetically sealed state at the lower opening, and the drive unit storage space formed by the enclosure frame and the dust-proof cover is a space that is isolated from the material fall space. It is comprised by the fixed_quantity | feed_rate supply apparatus of the said 1st characterized by the above-mentioned.

  The drive unit storage space can be constituted by, for example, an electric motor storage space (S2). With this configuration, the material falling space through which the material passes can be isolated from the drive unit storage space, so that dust generated due to the material falling can enter the drive unit storage space. For example, even a material having a property that generates dust or the like can be used without any influence because the influence of the dust on the drive system is eliminated.

  Third, a ventilation pipe is connected between the enclosure frame and the cylindrical casing, and the inside of the drive unit storage space in the enclosure frame and the cylindrical casing external space are communicated by the ventilation pipe. It can be configured by the above-described quantitative supply machine described in the second aspect.

  If comprised in this way, the heat | fever which generate | occur | produces in the drive part storage space which is isolation space can be discharged | emitted out of a cylindrical casing through a vent pipe, for example, cooling of a drive system can be performed smoothly.

  Fourth, the vibration hopper is suspended and supported by the lower end portion of the cylindrical casing by suspension means provided between the upper end portion of the vibration hopper and the lower end portion of the cylindrical casing. The quantitative feeder according to any one of (1) to (3) above, further comprising an anti-vibration elastic body for preventing the vibration of the vibration hopper from being transmitted to the cylindrical casing side. Consists of.

  The suspension means is, for example, a suspension plate that connects the support plate (17a) provided on the outer periphery of the lower end portion of the cylindrical casing, the support plate (18a) provided on the outer periphery of the upper end portion of the vibration hopper, and the support plates. It can be constituted by a bolt (21). The vibration-proof elastic body can be constituted by, for example, a vibration-proof rubber (23, 24) provided between the suspension bolt (21) and the both support plates (17a, 18a). If comprised in this way, the transmission of the vibration of a vibration hopper to the cylindrical casing side can be prevented, the useless vibration of the apparatus can be prevented, and the apparatus life can be kept long.

  Fifth, the downward inclination angle of the inclined surface of the vibration hopper with respect to the horizontal plane is such that the upper half side has a gentle downward inclination angle and the lower half side having the discharge port is the upper side. It is comprised so that it may become a downward inclination angle larger than the said predetermined downward inclination angle of a half part, It is comprised by the fixed-quantity feeder in any one of said 1st-4th characterized by the above-mentioned.

  The upper half side can be constituted by an upper hopper (14a), and the lower half side can be constituted by a lower hopper (14b). With this configuration, the uneven distribution of the material can be prevented by vibration of the gently inclined surface on the upper half side, and the material can be dispersed and smoothly guided downward, and the steep inclined surface on the lower half side can be obtained. By virtue of this vibration, the divided material can be promptly guided to the discharge port, and the overall vertical height of the vibration hopper can be suppressed and the apparatus can be miniaturized.

  Sixth, the above-described quantitative feeder is characterized in that the upper half side and the lower half side of the vibration hopper are detachably provided.

  If comprised in this way, the lower half part side of a vibration hopper will detach | leave from the upper half part side, and the maintenance inside a fixed quantity feeder can be performed easily.

  Seventh, the cylindrical casing is divided into an upper cylindrical portion and a lower cylindrical portion, and the machine casing and the driving machine are fixed to the lower cylindrical portion, and the inner cylinder is fixed to the upper cylindrical portion. The above-described quantitative supply device according to any one of the first to sixth aspects, wherein the upper cylindrical portion and the lower cylindrical portion are detachable.

  The upper cylindrical part can be constituted by an outer cylinder (3), and the lower cylindrical part can be constituted by a drive part supporting cylinder (1). If comprised in this way, the inside of a cylinder can be easily maintained by detaching | releasing an upper cylinder part from the said lower cylinder part. In addition, the volume of the upper cylindrical portion can be changed as appropriate according to the material conveyance capacity.

  In the present invention, as described above, the material is dropped and supplied from the entire region of the annular outer periphery of the circular bottom plate to the inverted conical vibration hopper through the material dropping space in a discrete manner without forming a lump. Therefore, vibration can be efficiently transmitted to each material dropped on the vibration hopper, and even a small piece of material such as a wood chip generates pulsation through the vibration hopper. And can be discharged smoothly from the outlet without any problems.

  In addition, since the material falling space through which the material passes and the drive unit storage space can be isolated, it is possible to prevent dust generated due to the material falling from entering the drive unit storage space, For example, even a material having a property that generates dust or the like can be used without any problem without affecting the dust driving system.

  Further, heat generated in the drive unit storage space, which is an isolation space, can be discharged to the outside of the cylindrical casing through the vent pipe, and for example, the drive system can be cooled smoothly.

  Further, the vibration-proof elastic body can prevent the vibration of the vibration hopper from being transmitted to the cylindrical casing side, thereby preventing unnecessary vibration of the apparatus and keeping the apparatus life long.

  Further, the uneven distribution of the material can be prevented by the vibration of the gently inclined surface on the upper half side of the vibration hopper, and the material can be dispersed and guided smoothly downward. Due to the vibration of the inclined surface, the divided material can be promptly guided to the discharge port, and thereby the overall height of the inverted conical vibration hopper can be suppressed, and the device can be downsized. it can.

  In addition, for example, the lower half side of the vibration hopper can be detached from the upper half side, so that maintenance inside the metering feeder can be easily performed.

  Further, by removing the upper cylindrical portion from the lower cylindrical portion of the cylindrical casing, maintenance inside the cylinder can be easily performed. In addition, the volume of the upper cylindrical portion can be changed as appropriate according to the material conveyance capacity.

It is side surface sectional drawing (longitudinal sectional drawing of FIG. 2) of the fixed quantity feeder which concerns on this invention. It is the sectional view on the AA line of FIG. It is a top view of the vibration hopper of a fixed amount feeder same as the above. It is side surface sectional drawing (longitudinal sectional view of Drawing 2) in the state where the vibration hopper of the fixed amount feeder was removed. FIG. 6 is a view taken along line DD in FIG. 4. It is an expanded side sectional view of the vibrator vicinity in the fixed amount feeder same as the above. It is an expanded side sectional view of the vicinity of the suspension bolt in the same quantitative feeder. It is a bottom view (the EE arrow view figure of FIG. 1) of the discharge port in a fixed amount feeder same as the above. It is a perspective view which shows the related structure of the enclosure frame and ventilation pipe in a fixed_quantity | feed_rate supply apparatus same as the above. It is a figure which shows a small piece-like material.

Hereinafter, the quantitative feeder according to the present invention will be described in detail.
FIG. 1 is a side cross-sectional view of the above-described metering feeder, and FIG. 2 is a cross-sectional view taken along line AA of FIG. In these drawings, reference numeral 1 denotes a drive part support cylinder having an upper and lower opening, which has a cylindrical shape centered on a common central axis (center axis) C. The drive part support cylinder 1 has an angle of 90 degrees on its outer peripheral surface. The column support plates 2 are horizontally fixed at four positions that are separated from each other (FIG. 2 and the like), and four columns 2a are fixed to the four column support plates 2 vertically, and the drive unit The support cylinder 1, and thus the metering feeder, is horizontally supported by the four columns 2a.

  The upper annular flange 1a of the drive unit support cylinder 1 is centered on the common central axis C (the center axis C is shared), and an outer cylinder 3 having an upper and lower opening having the same diameter as the drive unit support cylinder 1 is formed in the lower ring The outer peripheral edge of the annular upper lid (annular plate) 4 centered on the common central axis C is secured to the upper annular flange 3b of the outer cylinder 3 by the bolt B with a flange 3a. It is fixed. Therefore, the drive unit support cylinder 1 and the outer cylinder 3 are configured to be detachable for maintenance and the like.

  Furthermore, the outer peripheral surface of the inner cylinder 5 having an upper and lower opening smaller than the outer cylinder 3 around the common central axis C is fixed to the annular inner peripheral opening 4a which is the inner peripheral edge of the annular upper lid 4. On the upper surface of the inner cylinder 5, an opening 5a for material charging is formed. Further, the lower end 5b of the inner cylinder 5 is disposed close to a circular bottom plate 7 described later, and a material discharge gap t1 is formed between the lower end 5b and the circular bottom plate 7. A flow rate adjusting ring 27 is provided concentrically on the inner cylinder 5 on the outer periphery of the inner cylinder 5. The flow rate adjusting ring 27 has a horizontal mounting plate 27a fixed at three locations on its outer peripheral surface (see FIG. 2), and an adjusting bolt 28 is screwed onto the mounting plate 27a vertically from above the annular upper cover 4. Yes. Therefore, by rotating the adjusting bolt 28 and adjusting the position of the lower end 27b of the flow rate adjusting ring 27, the interval of the material discharge gap t1 can be adjusted. 1 and 4, the uppermost position and the lowermost position of the lower end 27b of the adjustment ring 27 are shown.

  In FIG. 2, the lower side is defined as “front”, the upper method is defined as “rear”, and the left and right directions when viewed from the front toward the rear are defined as “left and right direction”.

  Inside the drive unit support cylinder 1 (see FIG. 2), a reinforcing thin-width vertical plate linear fixing plate 6a parallel to the front-rear direction at a position spaced apart from the common central axis C by a certain distance in the left-right direction. 6b is fixedly arranged horizontally across the inner peripheral surface 1c rear side and the inner peripheral surface 1c front side of the cylinder 1, and is parallel to the left-right direction at a position spaced apart from the common central axis C by a certain distance in the front-rear direction. Thin reinforcing vertical thin plate 6c and 6d for fixing are horizontally fixed to the right side of the inner peripheral surface 1c and the left side of the inner peripheral surface 1c of the cylinder 1, thereby A support frame 6 in the form of a cross-girder (rectangular lattice) that is assembled vertically and horizontally with the common central axis C as the center is formed at the center inside the drive support cylinder 1 (see FIGS. 5 and 9).

  At the center of the support machine frame 6, a rectangular enclosure machine frame 6 ′ surrounding the upright rotating shaft 8 described later and having the common central axis C as a center is formed. The vertical widths of the fixing plates 6 a to 6 d constituting the enclosure frame 6 ′ are such that the upper end portion is positioned in the vicinity of the upper end portion of the drive unit support cylinder 1 and the lower end portion is the lower end portion of the drive unit cylinder 1. Each having a width t2 located slightly on the inner side from 1b, and located between the four corners of the envelope frame 6 ′ at the intersections 6 ″ (eight locations) to the inner peripheral surface 1c of the cylinder 1 The fixed plates 6a to 6d are configured to have a width t2 ′ (<t2) formed with a narrow upper width (see FIGS. 1 and 9).

  And the circular bottom board 7 centering on the said common central axis C is horizontally fixed to the upper part (upper side opening part 6e) of the said enclosure frame 6 'of the said width | variety t2. The level position of the upper surface of the circular bottom plate 7 is substantially the same as that of the upper annular flange 1a of the driving unit supporting cylinder 1, and a certain range in the outer peripheral edge of the circular bottom plate 7, that is, the inner surface in the outer periphery of the bottom plate 7. Outside the vicinity of the position where the position of the lower end 5b of the cylinder 5 is extended vertically downward, a downwardly inclined portion 7 ′ for smoothly extruding the material is formed over the entire circumference of the circular bottom plate 7.

  The diameter of the circular base 7 is smaller than the inner diameter of the drive unit support cylinder 1, and the outer peripheral edge 7 ″ (the outer peripheral edge 7 ″ of the downward inclined portion 7 ′) of the circular base plate 7 and the drive unit support cylinder 1. An annular material drop space S1 is formed between the inner peripheral surface 1c (see FIGS. 1 and 2).

  On the circular bottom 7, an upper end portion 8 ′ of an upright rotating shaft 8 protrudes on the common center line C, and a plurality (four in this embodiment) of rotating blades 9 are provided on the upper end portion 8 ′. Radially provided on the circular bottom 7 (see FIG. 2). The rotary blades 9 extend radially around the common central axis C every 90 degrees, and a narrow gap t3 is formed between each rotary blade 9 and the upper surface of the circular bottom 7. (See FIG. 1). Each rotary blade 9 rotates in the direction of arrow a about the common central axis C, and each rotary blade 9 is curved in an arc shape in the direction opposite to the rotation direction as a whole. An arcuate front edge 9 'is formed on the side. Accordingly, each rotary blade 9 has a configuration in which the distal end portion 9b side on the material drop space S1 side retreats with respect to the rotation direction a from the base end portion 9a side on the common central axis C side.

  The tip 9b of the rotary blade 9 is formed longer than the outer peripheral edge 7 ″ of the circular bottom 7 and the front end 9b is connected to the outer peripheral edge 7 ″ in the material drop space S1 and the inner cylinder 3 inside. It is comprised so that it may be located in the substantially middle position between the surrounding surfaces 3c (inner peripheral surface 1c of the drive part support cylinder 1). With this configuration, the material guided in the outer peripheral direction of the circular bottom 7 by the rotary blade 9 can be smoothly dropped and supplied via the downward inclined portion 7 '. On the back surface side of the circular bottom 7, a reduction gear 10 ′ and an electric motor 10 for rotationally driving the upright rotating shaft 8, and thus the rotary blade 9, are attached to the bolt B with a reduction gear mounting seat 10 ″. The reduction gear 10 ′ and the electric motor 10 are located on the common central axis C and are located in the center of the surrounding frame 6 ′ of the support machine frame 6.

  The lower end (lower opening 6h) of the surrounding machine frame 6 'is positioned substantially on the side of the speed reducer 10', and a central opening closing plate 6f is fixed to the lower opening 6h. (See FIGS. 1, 5, and 9). A circular central opening 6g of the central opening closing plate 6f is provided with a dust-proof cover 11 that covers the electric motor 10 and the speed reducer 10 'in a sealed state, and is constituted by the enclosure frame 6' and the dust-proof cover 11. The motor storage space S2 thus formed is configured to be a space isolated from the material drop space S1. The dust cover 11 has a cylindrical shape with an upper opening, and is fixed to the central opening closing plate 6f by a bolt B with a mounting flange 11 ′ provided at the upper edge (FIGS. 1 and 5). reference).

  Further, a round pipe having a circular cross section is provided between the central part of each of the fixing plates 6a, 6b, 6c, 6d constituting each surface of the enclosure frame 6 'and the outer peripheral surface 1c of the driving unit supporting cylinder 1. Are provided with four vent pipes 12a, 12b, 12c, and 12d (see FIGS. 2 and 9). The inner ends of the vent pipes 12a to 12d are opened 12 'in the enclosure frame 6', and the outer ends of the vent pipes 12a to 12d penetrate the outer peripheral surface of the drive unit support cylinder 1. Thus, an opening 12 ″ is opened to the outside. As a result, an inner space (motor housing space) S2 of the dust-proof cover 11 and an outer space of the driving unit supporting cylinder 1 in the enclosure frame 6 ′ where the electric motor 10 exists. S3 is communicated so that each of the vent pipes 12a to 12d can be used as a cooling passage for the electric motor 10. The electric wire 10a of the electric motor 10 passes through the vent pipe 12c, for example, and is connected to an electric wire relay box. 13 is also used as a wire for the electric motor 10 (see FIG. 2).

  As described above, the material supplied into the inner cylinder 5 is supplied to the vibration hopper 14 below from the outer peripheral edge 7 ″ of the circular bottom plate 7 via the material dropping space S 1. Since the electric motor 10 and the speed reducer 10 'are covered with the surrounding machine frame 6' and the dust cover 11, the dust accompanying the material drop supply does not enter the electric motor storage space S2. On the other hand, the electric motor housing space S2 is sealed by the dust cover 11 and the surrounding machine frame 6 ′, so that the fixing plates 6a to 6d of the surrounding machine frame 6 ′ of the supporting machine frame 6 The vent pipes 12a to 12d are respectively connected between the drive unit support cylinder 1 and the motor housing space S2 communicates with the drive unit support cylinder 1 external space S3. Ensure air ventilation Doing, it has a driving unit such as a motor 10 configured to be cooled.

  A vibration hopper 14 is provided below the drive unit support cylinder 1 (see FIG. 3). The vibration hopper 14 as a whole has an inverted conical shape (inverted conical shape) centered on the common central axis C, and a circular discharge port (discharge port) centered on the common central axis C at the lower end. ) 14 'is formed (see FIG. 8).

  The vibration hopper 14 has an upper hopper portion 14a having a gradual inclined surface 14a 'centered on the common central axis C, and an inclined surface 14b' centered on the common central axis C, which is sharper than the upper hopper portion 14a. The lower hopper portion 14b is provided, and the lower annular flange 15a of the upper hopper portion 14a and the upper annular flange 16a of the lower hopper portion 14b are connected by a bolt B. That is, the upper hopper portion 14a and the lower hopper portion 14b are detachable for maintenance and the like. The downward inclination angle of the inclined surface of the vibration hopper 14 with respect to the horizontal plane is such that the upper hopper portion 14a on the upper half side has a gentle predetermined downward inclination angle θ1 degree, and the discharge port 14 ′ is The lower hopper portion 14b on the lower half side is configured to have a downward inclination angle θ2 degrees (> θ1) larger than the predetermined downward inclination angle θ1 degrees of the upper half portion (see FIG. 1). .

  With such a configuration, the uneven distribution of the material can be prevented by the vibration of the gently inclined surface 14a ′ in the upper half of the vibration hopper 14, and the material can be dispersed and smoothly guided downward. The divided material can be quickly guided to the discharge port 14 ′ by the vibration of the steep inclined surface 14b ′.

  There are four suspension support plates 17a for supporting the vibration hopper 14 at positions every 90 degrees along the outer periphery centered on the common central axis C on the outer peripheral surface of the drive unit support cylinder 1. It protrudes horizontally at the place (see FIG. 2). Further, reinforcing ribs 17b and 17b are provided between the support plate 17a and the outer peripheral surface of the cylinder 1 so as to be orthogonal to the support plate 17a. A through hole 19 is provided in the center of each plate surface of these support plates 17a (see FIG. 7).

  On the other hand, the vibration hopper 14 has an upper cylindrical portion 14c having a slightly larger diameter than the driving portion supporting cylinder 1 and centering on the common central axis C at the upper end portion of the inclined surface 14a ′. On the outer peripheral surface of the upper cylindrical portion 14c, support plates 18a are horizontally projected at four positions along the outer periphery centered on the common central axis C (see FIG. 3). ). Reinforcing ribs 18b and 18b are provided between the respective support plates 18a and the upper cylindrical portion 14c so as to be orthogonal to the support plate 18a. A through hole 20 having the same diameter as the through hole 19 is provided in the center of each plate surface of the support plate 18a (see FIG. 7).

  The vibration hopper 14 has the upper cylindrical portion 14 c directed to the lower surface side of the drive unit support cylinder 1, and the four support plates 17 a of the drive unit support cylinder 1 and the four portions of the vibration hopper 14. The support plates 18a are aligned, the positions of the through holes 19 of the support plate 17a and the through holes 20 of the support plate 18a are aligned, and each of the four support plates 17a and the four support plates 18a. Are connected by the following configuration.

  That is, as shown in FIG. 7, suspension bolts 21 (four pieces) having a diameter smaller than the diameters of the through holes 19 and 20 are prepared, and nuts 23 and 23 are screwed into the center portions thereof, and Annular vibration-proof rubbers 22 and 22 having a diameter larger than the diameter of the through holes 19 and 20 are inserted, and the upper end and the lower end of the suspension bolt 21 are inserted into the through holes 19 and 20 from the inside, respectively. An annular anti-vibration rubber 24 having an outer diameter larger than the diameter of the through hole 19 is inserted into the upper end portion of the bolt 21 projecting on the support plate 17a, and a nut 23 is screwed into the support plate. The anti-vibration rubber 24 having an outer diameter larger than the diameter of the through hole 20 is inserted into the lower end portion of the bolt 21 protruding downward 18a, and the nut 23 is screwed.

  Thereafter, by tightening the nut 23 on the upper side of the support plate 17a and the nut 23 on the lower side of the support plate 17a, the support plate 17a is sandwiched between the upper and lower vibration isolating rubbers 24 and 22, and similarly the support plate 18a. By tightening the upper and lower nuts 23, 23, the support plate 18 a is sandwiched between the anti-vibration rubbers 22, 24, so that the vibration hopper 14 is suspended and supported on the lower surface side of the drive unit support cylinder 1.

  Thereby, the vibration hopper 14 is minutely laterally formed in a state where a gap is formed between the through hole 20 by the four suspension bolts 21 on the lower side of the drive unit support cylinder 1. While being supported so as to be able to vibrate, the vibration isolating rubbers 22, 24 absorb the vibration of the vibration hopper 14, and the vibration of the vibration hopper 14 passes through the suspension bolt 21 to the upper drive unit support cylinder 1. It is configured so that it is difficult to communicate directly.

  A vibrator (vibrator) 25 for applying vibration to the vibration hopper 14 is fixed to a part of the outer peripheral surface of the upper hopper portion 14 a of the vibration hopper 14 by vertical support plates 26 and 26. The vibrator 25 houses an electric motor having a vertical rotating shaft, and an unbalanced weight is provided on the output shaft of the electric motor. The amplitude of vibration (lateral vibration while making circular motion) generated by the rotation of the electric motor (for example, 3600 rpm) is about 0.4 mm to 0.6 mm in the left-right direction in FIG. The micro-vibration) can be transmitted to the vibration hopper 14 (see FIG. 6).

  Accordingly, when the vibrator 25 is driven to rotate, the vibration is transmitted to the vibration hopper 14, and the vibration hopper 14 has a lateral direction with an amplitude of about 0.4 mm to 0.6 mm (see FIG. 1). It will vibrate slightly in the horizontal direction.

  Reference numeral 29 denotes an annular connection seal fixed by a plurality of fixtures 30 along the outer periphery of the lower end of the drive unit support cylinder 1 (see FIGS. 1 and 6), and is configured in a cylindrical shape by an elastic body such as rubber. Yes. The connection seal 29 is arranged so that the upper end periphery thereof is in close contact with the outer periphery of the lower end of the drive unit support cylinder 1, and the lower end periphery is in contact with the upper surface (inclined surface 14a ′) of the upper hopper portion 14a (see FIG. 6). In this way, the annular connection seal 29 closes the lower end portion 1b of the drive unit support cylinder 1 and the upper end portion of the inclined surface 14a ′ of the upper hopper portion 14a, so that the direction from the material drop space S1 to the vibration hopper 14 direction. The material falling into the device is prevented from being scattered from the gap between the upper cylindrical portion 14c and the lower end portion 1b of the driving portion supporting cylinder 1 to the device external space S3.

  Since the present invention is configured as described above, the operation of the metering feeder according to the present invention will be described next. Note that, as an example, the material to be quantitatively supplied in the present embodiment is a wood chip having a length of 10 mm to 30 mm (see FIG. 10). The fixed quantity feeder is installed upright horizontally as shown in FIG. 1 by the support column 2a, and is a material storage bag or a straight conveyance for transferring the material to the next process under the discharge port 14 ′. Assume that a conveyor is installed. Further, the flow rate adjusting ring 27 is fixed at a predetermined position by the adjusting bolt 28.

  First, a material (wood chip) R is introduced into the outer cylinder 3 from the upper surface opening 5 a of the inner cylinder 5. The upper end level position of the charged material R is indicated by a virtual line in FIG. Then, the material R charged into the inner cylinder 5 is directed from the entire peripheral area of the lower end 27b of the flow rate adjusting ring 27 at the lower end of the inner cylinder 5 toward the outer peripheral edge 7 ″ of the circular bottom 7 through the material discharge gap t1. Then, it flows out onto the downwardly inclined portion 7 ′, for example, at a predetermined angle of repose θ3 (see the two-dot chain line in FIG. 4).

  Thereafter, the electric motor 10 is driven to rotate the rotary blade 9 in the direction of arrow a at a constant speed (for example, 1 rpm to 5 rpm), and the vibrator 25 is driven to vibrate the vibration hopper 14. Then, the rotary blade 7 starts to rotate in the direction of arrow a, and at the same time, the vibration hopper 14 starts a slight vibration with a lateral amplitude of about 0.4 mm.

  When the rotary blade 9 rotates, the material R on the circular bottom plate 7 starts to move in the direction of the arrow a as the rotary blades 9 rotate. While being pushed in the rotational direction (arrow a direction) by the arcuate front edge portion 9 ′ of the blade 9, the blade 9 is gradually pushed toward the outer peripheral edge 7 ″ of the circular bottom 7. Gradually moves in the direction of the outer peripheral edge 7 ″ while rotating in the direction of arrow a as a whole (see the directions of arrows b in FIGS. 1 and 2).

  Since the arc of the arcuate front end portion 9 ′ is in the direction opposite to the rotation direction of the rotary blades 9 and the distal end portions 9b of the rotary blades 9 are retracted from the base end portions 9a, the material R is the rotary blade 9 Is smoothly moved in the outer peripheral direction (arrow b direction) by the arcuate front end portion 9 ′.

  As a result, the material R is uniformly guided in the outer peripheral direction of the bottom plate 7 over the entire circumference of the circular bottom plate 7 and reaches the downward inclined portion 7 ′ of the circular bottom plate 7. The material R that has reached the downward inclined portion 7 ′ smoothly falls downward while rotating in the direction of arrow a from the circular peripheral area of the outer peripheral edge 7 ″ due to the inclination of the inclined portion 7 ′. Can do.

  Therefore, the material R that has flowed out from the inner cylinder 5 to the outside of the entire peripheral region through the annular material discharge gap t1 becomes a lump from the entire peripheral region of the downward inclined portion 7 ′ of the circular bottom plate 7. In a dispersive state (in a dispersive state), the entire bottom of the outer peripheral edge 7 ″ of the circular bottom 7 is continuously rotated downward in the direction of the arrow a through the material drop space S1. The liquid is dropped and supplied (in the direction of arrow b in FIG. 1).

  The material R that has fallen downward through the material dropping space S1 is uniformly dropped and supplied to the annular supply area M (hatched portion in FIG. 3) of the upper hopper portion 14a of the vibrating hopper 14 that is slightly vibrating ( FIG. 1 arrow b direction). In addition, when falling from the material drop space S1 to the vibration hopper 14, the vent pipes 12a to 12d exist in the material drop space S1, but since these vent pipes are round pipes, the material stays on the vent pipe. There is no. Moreover, although the said fixed plates 6a-6d exist in the said material fall space S1, since the width | variety of each fixed plate is thin, it does not affect the fall of the said material R. FIG.

  Therefore, the material R is continuously supplied from the annular material drop space S1 to the annular supply area M of the vibration hopper 14 while being rotated in a dispersed state without causing pulsation. The vibration of the vibration hopper 14 can be efficiently transmitted to each material R (wood chip) that has fallen on the annular supply area M of the vibration hopper 14.

  Therefore, the material R that has fallen into the annular supply area M of the upper hopper portion 14a is caused to vibrate along the inclined surface 14a ′ (arrow a) by the vibration (fine vibration) of the vibration hopper 14. Direction) (smoothly in the direction of arrow d in FIG. 3), and smoothly moves downward in the direction of the central axis C (see FIGS. 1 and 3 arrow d), and the lower hopper part is steeper than the upper hopper part 14a. Move to 14b. In the lower hopper portion 14b, vibration is effectively transmitted to the individual materials R. Therefore, the material R moved to the lower hopper portion 14b rotates in the rotation direction of the rotary blade 9 (see FIG. 1, the direction of arrow e in FIG. 3), the vibration hopper 14 is continuously guided to descend in the direction of the central axis C by the vibration of the vibration hopper 14, and is dropped and supplied downward from the discharge port 14 ′ at the lower end of the vibration hopper 14 (FIG. 1 arrow). f).

  As described above, the material falling from the circular bottom 7 to the vibration hopper 14 does not cause pulsation, and the entire circumference of the outer peripheral edge 7 ″ of the circular bottom 7 through the annular material dropping space S1. Since even a small piece of material R such as a wood chip is dropped on the vibration hopper 14, the vibration of the vibration hopper 14 is individually reflected. Since the material R is effectively transmitted to the material R, the material dropped on the vibrating hopper 14 is smoothly guided down and discharged from the discharge port 14 'in a fixed amount (a fixed amount at a fixed time) without causing pulsation. can do.

  Further, when the material R falls from the material drop space S1 to the vibration hopper 14, the electric motor storage space S2 is isolated from the material drop space S1 by the enclosure frame 6 'and the dust cover 11, so that dust or the like Does not enter the electric motor storage space S2. Further, since the annular connection seal 29 is located on the outer peripheral side of the annular supply area M, the material R does not scatter from the material drop space S1 to the external space S3.

  Further, during the supply of the material R, the heat in the motor housing space S2 can be released to the cylindrical casing outer space S3 through the openings 12 'and 12 "of the vent pipes 12a to 12d. The system can be cooled.

  Further, the vibration of the vibration hopper 14 can be damped by the vibration proof rubbers 22 and 24 fixed to the support plates 18a and 17a, and directly transmitted to the drive unit support cylinder 1 and other parts of the quantitative supply device. Never do.

  Moreover, various maintenance inside the apparatus can be performed by detaching the lower hopper portion 14b of the vibration hopper 14 from the upper hopper portion 14a or by detaching the outer cylinder 3 from the drive unit support cylinder 1.

  In the present invention, as described above, the material R is dropped from the entire circumference of the outer peripheral edge 7 ″ of the circular base 7 to the vibrating hopper 14 through the material drop space S1 in a discrete manner without forming a lump. Since it can be supplied, vibrations can be efficiently transmitted to the individual materials dropped on the vibration hopper 14. For example, even a small piece of material R such as a wood chip is passed through the vibration hopper 14. Thus, it is possible to smoothly and quantitatively discharge from the discharge port 14 ′ without causing pulsation.

  Further, the material R in a dispersed state is supplied to the annular supply area M of the vibration hopper 14 from the entire circumference area of the annular material fall space S1 while the material R is rotated in the rotation direction of the rotary blades 9 and supplied evenly. Therefore, when the material R is supplied onto the vibration hopper 14, the pulsation of the material R is already prevented, so that the vibration of the vibration hopper 14 is efficiently transmitted to the individual materials R. be able to.

  Further, the vibration hopper 14 has an inverted conical shape, and the material R can be uniformly dropped and supplied to the annular supply area M of the hopper 14, and the material R is also rotated downward on the vibration hopper 14 while rotating the material R. Therefore, while efficiently transmitting vibration to the material R, it can be smoothly guided downward.

  Further, since the material falling space S1 through which the material R passes and the electric motor storage space S2 can be isolated, it is possible to prevent dust or the like generated when the material R falls from entering the electric motor storage space S2. For example, even if the material R has properties that generate dust or the like, the influence of the dust on the drive system can be eliminated and used without any trouble.

  Further, the heat generated in the electric motor storage space S2 that is an isolation space can be discharged to the outside of the cylindrical casing (driving unit support cylinder 1) through the vent pipes 12a to 12d, and the cooling of the driving system such as the electric motor 10 can be smoothly performed. Can be done.

  Further, the vibration isolating rubbers 22 and 24 can effectively prevent the vibration of the vibration hopper 14 from being transmitted to the cylindrical casing (driving unit supporting cylinder 1) side, thereby preventing unnecessary vibrations of the device. The device life can be kept long.

  Further, the uneven distribution of the material R can be prevented by the vibration of the gently inclined surface 14 a ′ in the upper half of the vibration hopper 14, and the material R can be dispersed and smoothly guided downward. The divided material R can be quickly guided to the discharge port 14 ′ by the vibration of the steep inclined surface 14 b ′, thereby suppressing the vertical height of the inverted cone type vibration hopper 14 as a whole. Therefore, it is possible to reduce the size of the entire apparatus, particularly by suppressing the height in the vertical direction.

  Further, for example, the lower half side (lower hopper portion 14b) of the vibration hopper 14 can be detached from the upper half side (upper hopper portion 14a), so that maintenance inside the fixed quantity feeder can be easily performed.

  Further, by removing the upper cylindrical portion (outer cylinder 3) from the lower cylindrical portion (driving unit support cylinder 1) of the cylindrical casing, maintenance inside the cylinder can be easily performed.

  Further, the volume of the upper cylindrical portion (outer cylinder 3) can be appropriately changed according to the material conveyance capacity.

  Using the quantitative feeder according to the present invention, a wood chip having a length of 10 mm to 50 mm is used as the material R, the rotary blade 9 is driven to rotate, and the vibration hopper 14 vibrates in the left-right direction with an amplitude of about 0.41 mm. The weight of the material discharged from the discharge port 14 ′ of the vibration hopper 14 was measured (sampled) at 10 second intervals, and the variation rate of each measured value was measured.

  As a comparative example, the conventional quantitative feeder of Patent Document 1 that does not use a vibration feeder is used, the same material R is used, and the weight of the material R discharged from the discharge port under the same conditions as described above is set at an interval of 10 seconds. (Sampling), and the variation rate of each measured value was measured.

  As a result, in the conventional quantitative feeder of the comparative example, the supply accuracy (the fluctuation rate of the discharged weight every 10 seconds of the material) was 15% to 20%, but in the quantitative feeder according to the present invention, the supply accuracy (The fluctuation rate of the discharged weight every 10 seconds of the material) was 5% to 10%, and it was confirmed that the supply accuracy was greatly improved. In FIG. 1, 31 is a maintenance opening / closing plate for the annular upper lid 4, and 32 is a cap mounted on the upright rotating shaft 8.

  According to the quantitative feeder according to the present invention, for example, as wood chips, wood pellets, pellets such as RDF (Refuse Delivered Fuel), waste plastics and other small pieces of material with high precision Can be widely used.

1 Drive support cylinder (lower cylinder)
1c Inner peripheral surface 1e Lower end 3 Outer cylinder (upper cylindrical part)
3c Inner peripheral surface 4 Annular upper lid (annular plate)
4a annular inner periphery opening (inner periphery)
5 Inner cylinder 5b Lower end 6 'Enclosure frame 6a-6d Fixed plate (machine frame)
6e upper opening 6h lower opening 7 circular bottom 7 "outer peripheral edge 8 upright rotating shaft 9 rotary blade 10 motor 11 dustproof cover 12a-12d vent pipe 14 vibration hopper 14 'discharge port 14a upper hopper 14b lower hopper 21 suspended Lower bolt 22 Anti-vibration rubber (elastic body for anti-vibration)
24 Anti-vibration rubber (anti-vibration elastic body)
25 Vibrator
t1 Material discharge gap C Central axis S1 Material drop space S2 Motor storage space (drive unit storage space)
θ1, θ2 Downward tilt angle

Claims (7)

An annular plate sharing the central axis with the cylindrical casing is connected to the upper portion of the cylindrical casing, and an inner cylinder sharing the central axis is connected to the inner peripheral edge of the annular plate,
A machine frame is fixed between the opposed inner peripheral surfaces of the cylindrical casing below the lower end of the inner cylinder, and a circular bottom plate sharing the central axis is fixed to the upper center part of the machine frame,
An upright rotating shaft is provided on the central axis of the circular bottom plate, a plurality of rotary blades are provided radially on the upright rotating shaft on the upper surface side of the circular bottom plate, and a drive machine for rotating the upright rotating shaft is provided in the circular shape. Provided on the bottom side of the bottom board,
An annular material discharge gap is formed between the lower end of the inner cylinder and the upper surface of the circular bottom plate, and an annular material falling space is formed between the outer periphery of the circular bottom plate and the inner peripheral surface of the cylindrical casing,
A lower part of the cylindrical casing shares the central axis, supports an inverted conical vibration hopper located below the material dropping space, and provides a vibration exciter for vibrating the vibration hopper.
Due to the rotation of the rotating blades, the material dropped onto the vibrating hopper from the upper surface of the circular bottom plate via the material discharge gap and the material dropping space is discharged from the discharge port below the vibrating hopper via the vibrating hopper. A metering feeder that is configured to discharge. The machine frame comprises an enclosure machine frame that surrounds the upright rotating shaft at the center thereof,
The upper opening of the enclosure frame is closed by the circular bottom plate, and a dust-proof cover that covers the drive unit is provided in a sealed state at the lower opening of the enclosure frame,
2. The quantitative feeder according to claim 1, wherein the drive unit storage space constituted by the enclosure frame and the dust cover is a space isolated from the material drop space.   A vent pipe is connected between the envelope frame and the cylindrical casing, and the inside of the drive unit storage space in the envelope frame and the cylindrical casing external space are communicated by the vent pipe. The fixed-quantity supply machine of Claim 2. The vibrating hopper is suspended and supported by the lower end of the cylindrical casing by means of suspension provided between the upper end of the vibrating hopper and the lower end of the cylindrical casing.
The said suspension means is equipped with the vibration-proof elastic body for preventing transmission of the vibration of the said vibration hopper to the said cylindrical casing side, The any one of Claims 1-3 characterized by the above-mentioned. The metering feeder described in 1.   The downward inclination angle of the inclined surface of the vibrating hopper with respect to the horizontal plane is such that the upper half side has a gentle predetermined downward inclination angle, and the lower half side having the discharge port is the upper half portion. The metering feeder according to any one of claims 1 to 4, wherein the metering feeder is configured to have a downward inclination angle larger than a predetermined downward inclination angle.   6. The quantitative feeder according to claim 5, wherein the upper half side and the lower half side of the vibration hopper are detachably provided. The cylindrical casing is divided into an upper cylindrical part and a lower cylindrical part, and the machine casing and the driving machine are fixed to the lower cylindrical part, and the inner cylinder is fixed to the upper cylindrical part. ,
The quantitative feeder according to any one of claims 1 to 6, wherein the upper cylindrical part and the lower cylindrical part are detachable.

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