JP2010184750A - Powder material supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder material supply device capable of smoothly supplying a powder material to various apparatuses, by preventing a bridge phenomenon in a case member in which a transfer screw is rotatingly driven, by simplifying a structure as the whole device. <P>SOLUTION: When rotatingly driving the transfer screw 3, when an oscillating member 6 is push-moved toward the upright surface 12 side of an input hopper 5 and is impactively stopped by an upright surface 12, an upward turning external force component acts on respective disk parts 6a and 6a by a rotating leaf 3b, and the oscillating member 6 is pushed upward in the outer diameter direction of the transfer screw 3 in a receiving space 10. When further rotating the transfer screw 3, the respective disk parts 6a and 6a get over an outer peripheral end part of the leaf 3b, and the oscillating member 6 is dropped from there, and impactively strikes an outer peripheral surface of a shaft body 3a of the transfer screw 3, and generates vibration in the transfer screw 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a powder material supply device for supplying powder material to various devices.

  The powder material supply device is a device for supplying the powder material to various devices. For example, by rotating and driving a transfer screw having a spiral blade plate formed on a shaft body, the powder material is supplied by the transfer screw. There has been proposed one that transports and supplies it to various devices. In addition, with regard to the powder material supply device, it is indispensable for smooth powder material supply and supply operation to eliminate the bridging phenomenon, which is a phenomenon that the powder material is clogged in the case member in which the transfer screw is accommodated and hinders the flow. Various proposals have been made to eliminate or avoid such a bridging phenomenon.

  For example, according to the powder container storage blockage prevention device described in Patent Document 1 described below, the blockage prevention device includes a vibrator, a vibration transmission member, and a vibration isolation device. Is placed in the powder storage tank, and the vibration generated by the vibrator is transmitted to the vibration transmission member, so that the vibration transmission member is vibrated and the vibration is transferred to the powder in the powder storage tank. By transmitting, the bridge of the powder is broken, the fluidity of the powder is improved, and the powder is smoothly discharged.

Japanese Patent Laid-Open No. 2002-347885

  However, in the above-described blocking prevention device, when eliminating the bridging phenomenon of the powder material (powder), a vibrator is necessary separately from the drive means for driving the transfer screw to rotate. In addition, a mechanism for transmitting vibrations to the body, a vibration isolator for preventing the vibrations from reaching the powder storage tank itself, and the like are also required. For this reason, a complicated structure must be adopted as the entire apparatus, and there is a problem that maintenance is complicated and a risk that a failure occurs is increased. In addition, since a complicated structure is adopted, there is a problem that the space space occupied by the entire apparatus increases.

  Therefore, the present invention has been made to solve the above-described problems, and while simplifying the structure of the entire apparatus, it is possible to prevent the bridging phenomenon in the case member in which the transfer screw is rotationally driven, It aims at providing the powder material supply apparatus which can supply a powder material smoothly with respect to various apparatuses.

  In order to achieve this object, the powder material supply device according to claim 1 is for supplying powder material to various devices, and includes a transfer screw in which a spiral blade plate is formed around a shaft body. A case member that is formed in a substantially cylindrical shape that is fitted on the outer periphery of the transfer screw and rotatably accommodates the transfer screw, and is provided on one end side in the axial direction of the case member to supply the powder material into the case member A case supply port, a case discharge port that is provided on the other end side in the axial direction of the case member with respect to the case supply port, and discharges the powder material from within the case member. Drive means for driving the transfer screw to rotate about the shaft as a center of rotation for transferring from the case supply port side, and further engaging between the spiral blades of the transfer screw When the transfer screw is rotated by the driving means, it is pushed upward by the blade plate and is dropped over the outer peripheral end of the blade plate to strike the shaft body or the case member. An oscillation member that generates vibration in the transfer screw, and the oscillation member is prohibited from moving in the powder material transfer direction by the transfer screw, and the oscillation member can be moved up and down in the outer diameter direction of the transfer screw. Holding means for holding.

  According to the powder material supply apparatus of the first aspect, when the powder material is supplied into the case member from the case supply port, the transfer screw is rotationally driven in the case member around the shaft body by the driving means. Then, the powder material is transferred from the case supply port side to the case discharge port side by the blades of the transfer screw, discharged from the case discharge port, and supplied to various devices. The transfer screw for transferring the powder material is engaged with an oscillating member that generates vibration in the transfer screw between the spiral blade plates. The oscillating member is driven by the holding screw by the holding means. It is prohibited to move in the powder material transfer direction (powder material transfer direction), and is held so as to be movable up and down in the outer diameter direction of the transfer screw.

  For this reason, by rotating the transfer screw, the oscillating member is pushed upward by the blade of the transfer screw without being flowed in the powder transfer direction together with the powder by the blade of the transfer screw. When the outer end of the blade plate is overcome by pushing up, it falls and strikes the shaft body or case member of the transfer screw to generate vibration in the transfer screw. In addition, a series of operations of the oscillating member is repeated as long as the transfer screw continues to be rotationally driven. As a result, vibrations by the oscillating member are intermittently and periodically applied to the transfer screw. Then, this vibration causes the powder material adhering to the inside of the case member and the transfer screw to be peeled off, or the powder material is clogged in the case member and the mass (bridge) that impedes the flow is broken, so that the fluidity of the powder material is reduced. In addition, the bridge phenomenon itself is prevented from occurring.

  The powder material supply device according to claim 2 is the powder material supply device according to claim 1, wherein the holding means is provided in the case member, and a substantially hopper-shaped receiving space into which the powder material is charged communicates with the case supply port. A feeding hopper formed and accommodated in the receiving space so that the oscillating member is movable up and down; and the transfer screw is accommodated in the case member, and at least a part of the blade is in the case The oscillating member is exposed from the bottom of the receiving space through the supply port, and the oscillating member is housed in the receiving space of the charging hopper, and the spiral blades of the transfer screw through the case supply port It is engaged between the plates and strikes the shaft body of the transfer screw, the case member, or the charging hopper provided on the case member.

  According to the powder material supply device of claim 2, the powder material is operated in the same manner as that of the powder material supply device of claim 1, and the powder material is charged into the charging hopper so that a substantially hopper-shaped receiving space of the charging hopper is formed. It passes and is supplied to the case supply port. In addition, the oscillating member can be moved up and down in the outer diameter direction of the transfer screw while being prohibited from moving in the transfer direction of the powder material by the transfer screw by being accommodated in the receiving space of the charging hopper as a holding means. Retained.

  The powder material supply device according to claim 3 is the powder material supply device according to claim 1 or 2, wherein the oscillating members are opposed to each other with an interval corresponding to substantially an integral multiple of the pitch of the blades and are substantially in the same shape. A pair of disk portions formed, and formed in a substantially dumbbell shape having a neck portion that is formed in a smaller diameter than the disk portion, and the disk portions are coaxially connected to both end portions in the axial direction, Further, both of the pair of disk portions are engaged with each other between the spiral blades of the transfer screw in a posture substantially parallel to the transfer screw, and the shaft body of the transfer screw is formed by the pair of disk portions. Or the case member is hit.

  According to the powder material supply device of this third aspect, in addition to acting in the same manner as the powder material supply device of the first or second aspect, the oscillation member is formed in a substantially dumbbell shape by a pair of disk portions and a neck portion, and this Since the distance between the pair of disk parts is set to be approximately an integral multiple of the pitch of the blades of the transfer screw, both of the pair of disk parts can be simultaneously engaged between the spiral blades of the transfer screw. For this reason, when the transfer screw is driven to rotate, each disk portion of the oscillation member is pushed up and dropped by the blades of the transfer screw at approximately the same timing, and hits the shaft or case member of the transfer screw. It is made to hit. That is, intermittent and periodic vibrations are applied to the transfer screw by the pair of disk portions.

  In addition, when this powder material supply apparatus of Claim 3 is equipped with a charging hopper similarly to Claim 2, it is a charging screw shaft, a case member, or a charging member provided on the case member by a pair of disk portions. You may comprise so that a hopper may be hit.

  The powder material supply device according to claim 4 is the powder material supply device according to claim 3, wherein the thickness of the pair of disk portions is gradually reduced from the axial center portion to the outer peripheral portion of the pair of disk portions. It is formed in a substantially abacus bead shape having a tapered surface that is substantially V-shaped in cross section.

  The powder material supply apparatus according to claim 5 is the powder material supply apparatus according to claim 3 or 4, wherein the charging hopper according to claim 2 is provided, and the charging hopper is a part of an inner peripheral surface of the receiving space. And a sliding surface formed along the axial direction of the transfer screw, circumscribed by the pair of disk parts and supporting the oscillating member, and the sliding surface A part of the inner peripheral surface of the receiving space is formed from the edge of the case supply port on the case discharge port side, formed along the axis crossing direction of the transfer screw, and the axial direction of the oscillation member And a regulating surface that prohibits movement of the oscillating member in the powder material transfer direction by stopping the end.

  According to the powder material supply device of claim 1, the powder material can be transferred toward the case discharge port by rotating the transfer screw, and vibration for eliminating the bridging phenomenon caused by the oscillation member by the rotation of the transfer screw. It can be generated intermittently and periodically. That is, there is no need to separately provide a power source for oscillation, so that the structure of the entire apparatus can be simplified. Therefore, it is possible to reduce the labor of maintenance by adopting a complicated structure, reduce the frequency of failure, and further achieve downsizing of the entire apparatus.

  In addition, since the portion hit by the oscillation member is the shaft body or case member of the transfer screw that can be designed more robustly than the blade plate of the transfer screw, damage to the blade plate due to the impact of the oscillation member is prevented. At the same time, as in the conventional powder supply device described above, it is not a weak vibration considering the strength of the blades, but can generate sufficient vibration to peel off the powder material adhering to the transfer screw and the case member. There is an effect that can be done.

  According to the powder material supply device of claim 2, in addition to the effect of the powder material supply device of claim 1, the charging hopper for charging the powder material into the case supply port serves as a holding means for holding the oscillation member. Since it is also used, there is no need to separately provide means for holding the oscillation member so as to be movable up and down while prohibiting movement to a predetermined position with respect to the transfer screw, and the effect of further simplifying the structure of the entire apparatus can be achieved. is there. In addition, since the oscillation member strikes the transfer screw, the oscillation member itself is also vibrated, so that the powder material is also peeled off from the oscillation member in the charging hopper where the powder material is likely to adhere. There is an effect that can be.

  According to the powder material supply device of claim 3, in addition to the effect of the powder material supply device of claim 1 or 2, the engagement of the oscillation member and the blade of the transfer screw is performed via two disk parts. Therefore, when climbing over the crests of the blades of the transfer screw, it is possible to prevent the oscillation member that is likely to become unstable only by being accommodated in the receiving space from being rattled, and the oscillation member is raised and lowered to hit the transfer screw. There is an effect that the operation can be repeated in a stable state. In addition, for example, if the respective disk portions have substantially the same weight, the stability during the raising / lowering operation of the oscillation member is further improved. In addition, since the two disc portions are arranged so that different portions of the shaft body or the case member of the transfer screw are hit, the impact force applied to the transfer screw by the oscillation member can be distributed to each disc portion. There is an effect that the impact received by each hit location can be reduced.

  Even when the powder material supply device according to claim 3 is provided with a charging hopper as in claim 2, the two disk portions can separate the shaft of the transfer screw, the case member, or the separate portions in the charging hopper. Therefore, the impact force applied to the transfer screw by the oscillating member can be distributed to each disk portion, and the impact received by each hit location can be reduced accordingly.

  According to the powder material supply device of claim 4, in addition to the effect of the powder material supply device of any one of claims 1 to 3, each disk of the oscillation member respectively engaged between the spiral blade plates of the transfer screw When the portion is pushed up by the rotational movement of the blade plate, the disk portion is formed in a substantially abacus bead shape having a tapered surface, so that the blade plate is in contact with the tapered surface of each disk portion. The effect that the pushing-up operation of the oscillation member can be performed smoothly by generating a force to push each disk part upward in the outer diameter direction of the transfer screw by pushing each disk part in the powder material transfer direction by the plate. There is.

  According to the powder material supply device of claim 5, in addition to the effect of the powder material supply device of claim 3 or 4, each disk portion of the oscillation member is supported by the sliding surface, and the axial end portion of the oscillation member Can be held so that it can move up and down in the outer diameter direction of the transfer screw, and the transfer direction of the powder material by the transfer screw And the oscillation member can be held by an extremely simple structure.

It is a longitudinal cross-sectional view of the powder material supply apparatus which is 1st Example of this invention. It is a longitudinal cross-sectional view in the II-II line | wire of FIG. It is a component diagram regarding an oscillating member, (a) is a front view of the oscillating member, (b) is a side view of the oscillating member, and (c) is a disk on the CC line of (b). It is a longitudinal cross-sectional view of a part, (d) is a longitudinal cross-sectional view of the neck in the DD line of (a). It is explanatory drawing regarding the raising / lowering operation | movement of the oscillation member by rotation of a transfer screw. It is a longitudinal cross-sectional view of the powder material supply apparatus of 2nd Example of this invention, Comprising: The vertical cross section is seen in the same location as the II-II line of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view of a powder material supply apparatus 1 according to a first embodiment of the present invention. As shown in FIG. 1, the powder material supply device 1 is a device for supplying powder material to various devices (not shown), and mainly includes a case member 2, a transfer screw 3, and a drive device 4. And a charging hopper 5 and an oscillation member 6. The case member 2 is formed in a substantially cylindrical shape in which both axial end surfaces thereof are closed, and is formed so as to be able to accommodate the transfer screw 3 in a rotatable state.

  The case member 2 is provided with a case supply port 7 facing upward on one end side in the axial direction (right side in FIG. 1), and the opposite end to the case supply port 7, that is, the other end in the axial direction of the case member 2. The case discharge port 8 is opened downward on the side (left side in FIG. 1). The case supply port 7 is an opening for supplying the powder material into the case member 2, and the case discharge port 8 is an opening for discharging the powder material from the case member 2 to various devices. . Further, a part of the transfer screw 3 for transferring the powder material is exposed to the outside from the case supply port 7 and the case discharge port 8.

  The drive device 4 includes an electric motor (not shown) for rotating the transfer screw 3 for transferring the powder material around the shaft 3a of the transfer screw 3 as a rotation center, and the rotation shaft of the electric motor is a chain. It is connected to one axial end portion of the shaft body 3a of the transfer screw 3 via a transmission mechanism (not shown) such as a mechanism. Therefore, according to the driving device 4, the rotational force generated by the electric motor is transmitted to the shaft body 3a of the transfer screw 3 via the transmission mechanism, and the shaft 3a is rotated, so that the transfer screw 3 is moved to the case. Rotated within member 2.

  The transfer screw 3 transfers the powder material by rotating in the case member 2, and includes one substantially cylindrical shaft body 3 a extending in the same direction as the axial direction of the case member 2. The shaft body 3a is impacted by an oscillation member 6 described later, and is made of a material having impact resistance and corrosion resistance against moisture and other mixed components contained in the powder material, such as a stainless steel round bar material. Is formed.

  Further, on the outer periphery of the shaft body 3a of the transfer screw 3, a blade plate 3b protruding in the radial direction of the shaft body 3a is integrated in a spiral shape from one end side to the other end side in the axial direction of the shaft body 3a. Is formed. This vane plate 3b is used to push the powder material in the case member 2 from the case supply port 7 side to the case discharge port 8 side, and welds a plate material of the same material as the shaft body 3a to the outer periphery of the shaft body 3a. It is formed by that. Since the shaft 3a of the transfer screw 3 is hit by the oscillating member 6, the shock resistance is greater than that of the blade plate 3b, and the shaft 3a is formed more robustly.

  Further, the transfer screw 3 is rotatably supported at both axial ends of the shaft body 3a at both axial ends of the case member 2 via bearings (not shown). The case member 2 is inserted into the case member 2 in such a state that the case member 2 is fitted on the outer periphery of the plate 3b. In addition, the case member 2 that accommodates the transfer screw 3 is integrally provided with a charging hopper 5 as a part of the case member 2 at the opening edge of the case supply port 7.

  The charging hopper 5 is a member for guiding the powder material charged therein to the case supply port 7. Inside the charging hopper 5, a substantially hopper-shaped receiving space 10 having an open top is formed. ing. The receiving space 10 of the charging hopper 5 is a space for receiving the powder material charged into the charging hopper 5, and the bottom portion thereof is formed to communicate with the case supply port 7, and the transfer described above from the bottom of the receiving space 10. A part of the blade 3b of the screw 3 is exposed.

  The receiving space 10 is also used as a space for accommodating the oscillation member 6. In other words, the charging hopper 5 is a member that functions as a holding unit that houses and holds the oscillation member 6 in the receiving space 10, and in the receiving space 10, the oscillation member 6 transfers the powder material by the transfer screw 3. Movement in the direction (arrow X direction in FIG. 1) is prohibited, and the transfer screw 3 is held so as to be movable up and down in the outer diameter direction.

  Here, with reference to FIG.1 and FIG.2, the structure of the injection | throwing-in hopper 5 is demonstrated. 2 is a longitudinal sectional view taken along line II-II in FIG.

  As shown in FIGS. 1 and 2, the inner peripheral surface of the receiving space 10 of the charging hopper 5 is mainly composed of four surfaces. Of the four surfaces constituting the inner peripheral surface of the receiving space 10, both sides of the transfer screw 3 in the axis crossing direction (perpendicular to the paper surface in FIG. 1, left-right direction in FIG. 2) are directed to the case supply port 7. The inclined surfaces 11, 11 that are inclined downward are provided one by one, and each of the inclined surfaces 11, 11 is along the axial direction of the transfer screw 3 (the left-right direction in FIG. 1, the direction perpendicular to the paper surface in FIG. 2). It is formed in a wide shape.

  Each of the inclined surfaces 11 and 11 of the charging hopper 5 functions as a chute (sliding surface) that allows the powder material charged into the charging hopper 5 to be slid into the case supply port 7 and dropped. In the first embodiment, the oscillating member 6 is also used as a support surface for supporting the oscillating member 6 accommodated in the receiving space 10 while being circumscribed with the outer peripheral ends of the disk portions 6a, 6a. Is.

  In addition, upright surfaces 12 and 13 that rise substantially vertically are provided on both ends in the width direction of each inclined surface 11 and 11 (the left-right direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2). The upright surfaces 12 and 13 are formed in a wide and substantially fan shape along the axis crossing direction of the transfer screw 3. Of these two upright surfaces 12 and 13, the upright surface 12 erected from the edge of the case supply port 7 on the case discharge port 8 side (the left side of FIG. 1) is the axial end of the oscillation member 6. It functions as a regulating surface that stops and prohibits the oscillation member 6 from moving in the powder material transfer direction.

  Returning to FIG. 1, the oscillating member 6 is engaged with a portion (hereinafter referred to as “valley”) between the blade hills and the blade hills in the spiral blade plate 3 b of the transfer screw 3. When the transfer screw 3 is rotated by the drive device 4, the oscillation member 6 is pushed upward by the blade plate 3 b corresponding to the gear teeth when the transfer screw 3 functions as a worm gear. 3, the shaft 3 a of the transfer screw 3 is hit by falling after the outer peripheral end of the vane plate 3 b is overcome after being temporarily removed from the valley portion of the 3 blade plate 3 b, and the transfer screw 3 is vibrated. Is.

  The oscillating member 6 has an interval W (= A × P) (where A is 0), which is substantially an integral multiple of the pitch of the blade plate 3b of the transfer screw 3 (the interval width between the outer peripheral ends of the blade plate 3b) P. A pair of disk portions 6a, 6a opposed to each other with an integer except for))), and a neck portion 6b connecting the pair of disk portions 6a, 6a to each other. The pair of disk parts 6a and 6a are disk bodies having substantially the same shape, the same size and the same weight, and are, for example, a synthetic resin material that is lighter than the material of the neck part 6b and has impact resistance. It is made of some ABS resin.

  Moreover, since each disk part 6a, 6a of the oscillation member 6 is formed of a synthetic resin material having a small frictional resistance such as an ABS resin, the frictional resistance of the transfer screw 3 with respect to the blade plate 3b is reduced. For this reason, when the oscillating member 6 is pushed up by the blade plate 3b, the load acting on the driving device 4 is also reduced, and accordingly, the electric motor of the driving device 4 can be reduced in output or reduced in size.

  3A and 3B are component diagrams relating to the oscillating member 6. FIG. 3A is a front view of the oscillating member 6. FIG. 3B is a side view of the oscillating member 6. FIG. ) Is a longitudinal sectional view of the oscillating member 6 taken along the line CC of FIG. 3B, and FIG. 3D is a longitudinal sectional view of the neck 6b taken along the line DD of FIG. 3A. is there.

  As shown in FIG. 3, the pair of disk portions 6a, 6a are gradually reduced in thickness from the axial center portion (center portion) toward the outer peripheral portion, and the outer peripheral portion has a substantially V-shaped tapered surface in sectional view. It is formed in a substantially abacus bead shape having 6c. Further, the disk portion 6a formed in a substantially abacus bead shape as described above is configured to be pushed toward the upright surface 12 side in a state where the tapered surface 6c is in contact with the blade plate 3b of the transfer screw 3. (See FIG. 1).

  Thus, if the blade plate 3b is pushed in contact with the tapered surface 6c of the disk portion 6a, the axial end of the oscillation member 6 is bumped to the upright surface 12 as shown in FIG. When it becomes impossible to move further in the powder material transfer direction, the substantially horizontal external force component toward the upright surface 12 acting on each of the disk portions 6a, 6a is canceled by the reaction from the upright surface 12, and the transfer screw The oscillating member 6 is smoothly lifted upward in the receiving space 10 by a substantially vertical external force component directed upward in the outer diameter direction of the three blade plates 3b.

  Moreover, the shape of the outer peripheral end of the substantially abacus disk 6a, 6a is formed in a substantially trapezoidal shape, and the outer peripheral end of the disc 6a, 6a is a hit location (this first part). In the embodiment, it can be in surface contact with the outer peripheral surface of the shaft 3a of the transfer screw 3, and is formed so as to reduce the pressure applied to the hit location at the time of hitting and prevent damage to the hit location. Yes. In addition, since the shaft body 3a of the transfer screw 3 is hit at different locations by the two disk portions 6a and 6a, the impact force applied to each hitting location of the shaft body 3a of the transfer screw 3 is also dispersed.

  Further, it is possible to design the hitting portion of the transfer screw 3 hit by the disk portions 6a, 6a of the oscillation member 6 more robustly than the blade plate 3b which must be thin and weak. Since the shaft 3a is adopted, the blade plate 3b can be prevented from being damaged by being struck, and moreover, compared with the case where the blade plate 3b is struck, the powder material bridged in the case member 2 It is possible to generate a sufficiently large vibration to break down.

  The neck portion 6b of the oscillating member 6 is formed of a cylindrical rod material having a smaller diameter than each of the disk portions 6a and 6a and having anticorrosion and rigidity, for example, a round rod material made of resin or stainless steel. The axial center portions (center portions) of the disk portions 6a and 6a are coaxially connected and fixed to both ends of the neck portion 6b in the axial direction by bolts or the like. The oscillating member 6 is formed by the pair of disk portions 6a and 6a and the neck portion 6b so that the appearance thereof is substantially dumbbell-shaped.

  Thus, since the oscillation member 6 is formed in a substantially dumbbell shape, the center of gravity of the oscillation member 6 can be positioned substantially on the neck portion 6b corresponding to the intermediate portion between the disk portions 6a and 6a. Even when the unstable operation of moving up and down over the blade plate 3b is repeated, the stability of the oscillation member 6 can be improved. For this reason, even if the oscillating member 6 is simply housed in the receiving space 10 of the charging hopper 5 in a free state, the occlusal state of the transfer screw 3 with respect to the blade plate 3b is difficult to come off.

  Returning to FIG. 1, the oscillation member 6 configured as described above is accommodated in a position substantially parallel to the transfer screw 3 at the bottom in the receiving space 10 of the charging hopper 5 described above. Both of the disk portions 6 a and 6 a are engaged with the valley portions of the spiral blade plate 3 b of the transfer screw 3 through the case supply port 7.

  In this way, the oscillation member 6 is engaged with the blade plate 3b of the transfer screw 3 at two locations simultaneously via the two disk portions 6a and 6a, so that the oscillation member 6 gets over the blade plate 3b. Even if the operation becomes unstable when the ascending / descending operation is repeated, the occlusal state of the transfer screw 3 with respect to the blade plate 3b is more difficult to come off. For this reason, even if the oscillating member 6 is simply accommodated in the receiving space 10 of the charging hopper 5, the raising and lowering operation of the oscillating member 6 for hitting the transfer screw 3 is performed in the receiving space of the charging hopper 5. 10 can be repeated in a stable state.

  In the oscillation member 6, the outer peripheral end portions of the disk portions 6a and 6a that are engaged with the transfer screw 3 are in contact with the outer peripheral surface of the shaft body 3a of the transfer screw 3, and in this state, the oscillation member 6 The neck 6b is spaced apart from the outer peripheral end of the blade 3b of the transfer screw 3. Therefore, when the disk portions 6a and 6a of the oscillation member 6 strike the shaft body 3a of the transfer screw 3, the neck portion 6b of the oscillation member 6 does not collide with the shaft body 3a of the transfer screw 3, and this It is prevented from being damaged.

  Next, with reference to FIG. 4, the operation | movement and usage method of the powder supply apparatus 1 comprised as mentioned above are demonstrated. FIG. 4 is an explanatory diagram regarding the raising / lowering operation of the oscillation member 6 by the rotation of the transfer screw 3.

  According to the powder material supply apparatus 1 of the first embodiment, when powder material is introduced into the receiving space 10 from the upper opening of the charging hopper 5, the powder material is applied to the inclined surfaces 11, 11 of the receiving space 10. Then, it slides down or falls in the air in the receiving space 10 and is supplied into the case member 2 through the case supply port 7.

  On the other hand, when the electric motor of the driving device 4 is operated, the transfer screw 3 is rotationally driven in the case member 2 through the transmission mechanism, and the powder material is supplied to the case supply port 7 by the blade plate 3b of the transfer screw 3. It passes through the inside of the case member 2 from the side, is transferred toward the case discharge port 8 side, is discharged from the case discharge port 8, and is supplied to various devices.

  When the transfer screw 3 is driven to rotate, the oscillating member 6 is pushed toward the upright surface 12 side of the making hopper 5 by the spiral blade 3b meshed with the disk portions 6a, 6a. . Then, as shown in FIG. 1, when the axial end portion of the oscillation member 6 is stopped by the upright surface 12 by this pushing, the rotating blade plate 3 b moves upward with respect to the disk portions 6 a and 6 a. The external force component heading acts.

  Then, as shown in FIG. 4A, the oscillating member 6 is pushed upward in the outer diameter direction of the transfer screw 3 in the receiving space 10, and then when the transfer screw 3 is further rotated, FIG. As shown in (b), each disk part 6a, 6a gets over the outer peripheral end part of the blade 3b. Then, as shown in FIG. 4 (c), the oscillating member 6 falls from there and strikes the outer peripheral surface of the shaft body 3a of the transfer screw 3 to generate vibrations in the transfer screw 3. The vibration is also propagated to the case member 2.

  However, when the oscillation member 6 is dropped by the rotation of the transfer screw 3, even if the shaft body 3a of the transfer screw 3 is not necessarily hit by the oscillation member 6, the inclined surface 11 of the case member 2 is impacted by the oscillation member 6. If hit, vibrations can be generated in the case member 2 and the transfer screw 3.

  A series of raising / lowering operations in which the transfer screw 3 is hit by the oscillation member 6 in this manner are repeated as long as the transfer screw 3 is continuously driven to rotate. As a result, intermittent and periodic vibration is applied to the transfer screw 3, so that the powder material adhering to the case member 2 and the transfer screw 3 is peeled off or the powder material is clogged in the case member 2 and flows. The bridging phenomenon that hinders the prevention is prevented, and the fluidity of the powder material is enhanced.

  Next, a modification of the first embodiment will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of the powder material supply device 20 of the second embodiment, and is a longitudinal sectional view taken along the line II-II in FIG. The powder material supply device 20 of the second embodiment is obtained by changing the hitting position by the oscillation member 6 with respect to the powder material supply device 1 of the first embodiment described above. In the following, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  As shown in FIG. 5, in the powder material supply device 20 of the second embodiment, the charging hopper 21 is formed integrally with the case member 2 as in the first embodiment. Compared to the case, the opening angle θ between the inclined surfaces 11 and 11 of the charging hopper 21 is formed small. For this reason, each disk part 6a, 6a of the oscillation member 6 is mounted in a state of circumscribing each of the inclined surfaces 11, 11, and in this state, it is sufficiently from the outer peripheral surface of the shaft body 3a of the transfer screw 3. It is held at a separated upper position.

  Therefore, when the oscillating member 6 moves up and down by the rotational drive of the transfer screw 3, each disk portion 6 a, 6 a does not hit the transfer screw 3, and each inclined surface 11 of the receiving space 10 in the charging hopper 21. , 11 is hit and vibration is propagated to the case member 2 and the transfer screw 3.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the first and second embodiments described above, it has been described that the hit location by the oscillating member 6 is the outer peripheral surface of the shaft body 3a of the transfer screw 3 or the inclined surfaces 11 and 11 of the charging hopper 5. However, the hit location is not necessarily limited to these, and for example, the case member itself may be hit by the oscillation member.

1,20 Powder material supply device 2 Case member 3 Transfer screw 3a Shaft body 3b Blade plate 4 Drive device (drive means)
5,21 Input hopper (input hopper, holding means)
6 Oscillating member 7 Case supply port 8 Case discharge port 10 Receiving space 11, 11 Inclined surface (sliding surface)
12 Upright surface (regulatory surface)

Claims (5)

A powder material supply apparatus for supplying powder material to various devices, a transfer screw in which a spiral blade plate is formed around a shaft body, and a substantially cylindrical shape that is fitted around the outer periphery of the transfer screw A case member that is rotatably formed and accommodates the transfer screw, a case supply port that is provided on one end side in the axial direction of the case member and supplies powder material into the case member, and the case supply port A case discharge port provided on the other axial end side of the case member for discharging the powder material from the case member, and the transfer screw for transferring the powder material from the case supply port side toward the case discharge port. In the powder supply apparatus comprising a driving means for rotationally driving the shaft body as a rotation center,
When it is engaged between the spiral blades of the transfer screw and the transfer screw is rotated by the driving means, the transfer screw is pushed upward by the blades to get over the outer peripheral end of the blades and drop. An oscillation member that strikes the shaft body or the case member to generate vibration in the transfer screw;
The oscillating member is provided with holding means that prohibits the oscillating member from moving in the powder material transfer direction by the transfer screw and holds the oscillating member so as to be vertically movable in the outer diameter direction of the transfer screw. Powder material supply device. The holding means is provided in the case member, a substantially hopper-shaped receiving space for charging powder material is formed in communication with the case supply port, and the oscillating member is accommodated in the receiving space so as to be movable up and down. Hopper,
In the state where the transfer screw is accommodated in the case member, at least a part of the blade is exposed from the bottom of the receiving space through the case supply port,
The oscillation member is engaged between the spiral blades of the transfer screw through the case supply port in a state of being accommodated in the receiving space of the charging hopper, and the shaft body and the case member of the transfer screw. 2. The powder material supply apparatus according to claim 1, wherein the charging hopper provided in the case member is struck.   The oscillating member is opposed to each other with an interval corresponding to substantially an integral multiple of the pitch of the blades and is formed in a substantially same shape with a pair of disk parts having a smaller diameter than the disk parts. Is formed in a substantially dumbbell shape having neck portions that are coaxially connected to both ends in the axial direction, and further, the spiral blade of the transfer screw in a posture substantially parallel to the transfer screw. The pair of disk parts are respectively engaged between plates, and the shaft body or case member of the transfer screw is hit by the pair of disk parts. Powder material supply device.   The pair of disk parts are formed in a substantially abacus bead shape having a taper surface having a substantially V-shaped cross-sectional view in the outer peripheral part with a gradually decreasing thickness from the axial center part to the outer peripheral part of the disk part. The powder material supply apparatus according to claim 3. The charging hopper according to claim 2 is provided,
The charging hopper forms a part of the inner peripheral surface of the receiving space, is inclined downward toward the case supply port, is formed along the axial direction of the transfer screw, and circumscribes the pair of disk portions. A sliding surface that supports the oscillating member, and a part of the inner peripheral surface of the receiving space together with the sliding surface, and is erected from an edge on the case discharge port side of the case supply port, And a regulating surface that is formed along an axis crossing direction and that is blocked at an axial end portion of the oscillation member to prohibit the oscillation member from moving in the powder material transfer direction. The powder material supply apparatus according to 3 or 4.

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