JP2007130603A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector which is light and small as before, which dispenses with a large storage space to store particularly a number of dust collectors, and which is planed to improve maintenance workability such as cleaning and changing a filter. <P>SOLUTION: The dust collector 10 comprises a tubular housing divided into two up and down rooms with a partition 12, one room of which is provided with an intake opening 29 on the side wall and with a cylindrical filter 25 therein, the other room of which is provided with exhaust openings 17 on the side wall, with a vane wheel 16 of a fan and with volute type exhaust paths disposed at the periphery part of the vane wheel 16, the delivery ports of which is communicated with the exhaust openings 17 wherein the cross section of the tubular housing 11 is rectangular with a plural number of the exhaust openings 17, the number of volute type exhaust paths is made to be the same as that of exhaust openings, and each delivery port of the volute type exhaust paths communicates with each exhaust opening. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dust collector that includes a filter and a fan, sucks air through the filter with the fan, removes dust suspended in the air, and exhausts the air from which dust has been removed, and particularly generates a large amount of dust. The present invention relates to a dust collector suitable for removing a large amount of dust floating in the air in a work site such as a construction site.

  FIG. 1 is a diagram showing the configuration of a conventional dust collector of this type. As shown in the figure, the dust collector 100 includes a casing (cylindrical casing) 101 having a circular cross section, and the inside of the casing 101 is divided into a vertical chamber by a partition plate 102, that is, an upper chamber 103 and a lower chamber 104. The inlet port 105 is provided on the side wall of the lower chamber 104, and the exhaust port 106 is provided on the side wall of the upper chamber 103. A cylindrical filter 107 is arranged in the lower chamber 104, and an impeller 109 of the fan unit 108 is made to face the cylindrical suction port 110 provided at the center of the partition plate 103 in the upper chamber 103. Arranged. Reference numeral 111 denotes a motor that rotationally drives the impeller 109.

  When the motor 111 is activated and the impeller 109 is driven to rotate, the air sucked through the intake port 105 passes from the outer peripheral side to the inner peripheral side of the tubular filter 107 and passes through the suction port 110 provided in the partition plate 102 to the fan. It is sucked by the intake portion of the impeller 109 of the portion 108 and is exhausted from the exhaust port 106 through the volute exhaust passage described later from the exhaust portion of the impeller 109. Reference numeral 113 denotes a caster attached to the lower surface of the casing 101.

  FIG. 2 is a view showing a planar shape of the volute type exhaust passage 112 disposed in the upper chamber 103. In FIG. 2, D is the outer diameter dimension (basic vortex diameter) of the impeller 109, A is the end point depth of the volute of the exhaust passage 112, and B is the length of the exhaust port 106. The air sucked into the intake portion of the impeller 109 is exhausted from the exhaust port 106 through the volute exhaust passage 112 from the outer peripheral exhaust port of the impeller 109. Here, the maximum diameter dimension of the housing 101 is Y1 = Y + D + 1.5A, and the outer peripheral length L1 of the housing 101 is L1 = π (D + 1.5A).

  Among the dust collectors 100 configured as described above, a small and lightweight model that is operated with a single-phase 100V power supply places the highest priority on light weight, size reduction, and cost reduction. In maintenance, as shown in FIG. 3, as shown in FIG. 3, the fan unit 108 including the upper chamber 103 is removed from the lower chamber (housing body) 104 of the casing 101, and the cylinder accommodated in the lower chamber 104 is accommodated. The filter 107 is taken out. Daily maintenance at a construction site or the like as a dust collector is performed by cleaning the cylindrical filter 107.

  In recent years, as described above, a large number of dust collectors are owned by rental companies, and there are an increasing number of so-called rental-type usage forms that are lent for a fee each time the dust collector is used. As a dust collector rental company has a large number of dust collectors, there is an increasing demand for dust collectors that have a large storage space and a small storage space. The conventional dust collector including the cylindrical casing 101 has a short outer peripheral length and is advantageous in resistance to negative pressure, and a thin steel plate or the like constituting the casing 101 can be used. However, because of the cylindrical shape, there is a problem that a large storage space is required when storing a large amount of dust collectors.

  Further, during maintenance, as shown in FIG. 3, the fan unit 108 including the upper chamber 103 is disassembled and removed from the lower chamber (housing body) 104 of the housing 101, and the cylindrical filter 107 is taken out to the outside. Therefore, maintenance workability was bad. In particular, the weight of the fan unit 108 including the motor 111 is as heavy as several tens of kg even in a small and lightweight model operated at a single phase of 100 V, and the work of lifting the fan unit 108 separated from the housing body is heavy labor. Further, a large space is required for maintenance work because the fan unit 108 is separately placed in addition to the casing 101 during the cleaning of the filter.

  The present invention has been made in view of the above points, eliminates the above-mentioned problems, is light and small in size, and does not require a large storage space particularly for storing a large number of dust collectors, and An object of the present invention is to provide a dust collector that improves maintenance workability such as cleaning and replacement of a filter.

  In order to solve the above problems, the invention described in claim 1 divides the inside of the cylindrical housing into two upper and lower chambers via a partition plate, and provides a suction port on the side wall of one chamber and arranges a cylindrical filter inside. An exhaust port is provided in the side wall of the other chamber, and a fan impeller and a volute type exhaust passage located on the outer peripheral portion of the impeller and having a discharge port communicating with the exhaust port are provided to drive the fan. The air sucked through the intake port by the air passes from the outer peripheral side to the inner peripheral side of the cylindrical filter and is sucked into the intake portion of the impeller of the fan from the suction port provided in the partition plate. In the dust collector configured to be exhausted from the exhaust port through the volute type exhaust passage, the cylindrical housing has a rectangular cross section and a plurality of the exhaust ports. Exhaust port And the same number, and wherein the connected discharge port of the volute type exhaust passage to each of the exhaust ports.

  According to a second aspect of the present invention, in the dust collector of the first aspect, the centers of the plurality of volute type exhaust passages are substantially coincident with the rotation center of the impeller of the fan.

  The invention according to claim 3 is the dust collector according to claim 1 or 2, wherein the dust collector is supported by a rib plate attached to the inner wall of the housing at a position facing the air inlet in the housing and spaced apart by a predetermined distance. A board is arranged.

  According to a fourth aspect of the present invention, in the dust collector according to any one of the first to third aspects, the fan impeller is disposed in an upper chamber of a housing partitioned by the partition plate and the cylindrical shape is provided. A filter is disposed in the lower chamber, an opening / closing door is provided on the bottom side of the casing, and the cylindrical filter can be taken into and out of the lower chamber with the opening / closing door open.

  According to a fifth aspect of the present invention, in the dust collector according to the fourth aspect, the cylindrical filter is pushed up in a state where the cylindrical filter in the lower chamber is housed, and an upper end thereof is brought close to the outer periphery of the suction port of the partition plate. An elevating mechanism for close contact is provided.

  According to a sixth aspect of the present invention, in the dust collector according to any one of the first to third aspects, the fan is disposed in an upper chamber of a housing partitioned by the partition plate, and the cylindrical filter is disposed in the lower part. The drawer is arranged at the bottom of the lower chamber, the cylindrical filter is arranged on the drawer, an opening / closing door is provided on the bottom side of the housing, and the drawer is opened with the opening / closing door open. Is configured to be able to be pulled out to the outside of the housing.

  A seventh aspect of the present invention is the dust collector according to the sixth aspect, wherein the cylindrical filter is disposed on the drawer and the cylindrical filter is pushed up while the drawer is housed in the lower chamber. An elevating mechanism is provided that closely contacts the vicinity of the outer periphery of the suction port of the partition plate.

  According to an eighth aspect of the present invention, in the dust collector according to any one of the first to third aspects, the impeller of the fan is arranged in a lower chamber of a housing partitioned by the partition plate and the cylindrical shape. A filter is disposed in the upper chamber, an opening / closing door is provided on the bottom side of the housing, and the cylindrical filter can be inserted into and removed from the lower chamber with the opening / closing door open.

  According to a ninth aspect of the present invention, in the dust collector according to the eighth aspect, the upper end of the cylindrical filter is pressed in a state where the cylindrical filter is housed in the upper chamber, and the lower end of the dust collector is the outer periphery of the suction port of the partition plate It is characterized by providing a pressing mechanism that closely contacts the vicinity.

  According to the first aspect of the present invention, the cylindrical housing has a rectangular cross section, a plurality of exhaust ports, the same number of volute exhaust passages as the exhaust ports, and the discharge ports of the volute exhaust passages are exhausted. By connecting to the mouth, the air discharged from the fan impeller is discharged through a plurality of volute exhaust passages, and the cross-sectional area of the housing can be reduced as described in detail later. Even if the size of the filter or fan is the same as that of the conventional one, it is possible to provide a dust collector that requires less horizontal area, that is, storage space.

  According to the second aspect of the present invention, since the centers of the plurality of volute exhaust passages are substantially coincident with the rotation center of the fan impeller, the radial mechanical balance is good, and the radial vibration is small. In addition, it is possible to provide a stable dust collector that can improve the bearing life and reduce the temperature rise of the motor.

  According to the third aspect of the present invention, the abutting plate supported by the rib plate attached to the inner wall of the housing is disposed at a position facing the air inlet in the housing and spaced apart by a predetermined distance. A foreign object such as a metal piece abuts against the abutting plate and does not puncture the cylindrical filter, thereby damaging the cylindrical filter.

  According to the fourth aspect of the present invention, the fan impeller is disposed in the upper chamber of the casing partitioned by the partition plate, the cylindrical filter is disposed in the lower chamber, and the opening / closing door is provided on the bottom side of the casing. Since the cylindrical filter can be taken in and out of the lower chamber with the opening and closing door opened, the cylindrical filter can be taken out of the dust collector by opening the opening and closing door, and can be easily stored. A dust collector with easy maintenance work can be provided.

  According to the invention described in claim 5, the cylindrical filter is provided with a lifting mechanism that pushes up the cylindrical filter in a state in which the cylindrical filter in the lower chamber is housed and closely contacts the upper end thereof in the vicinity of the outer periphery of the suction port of the partition plate. The upper end of the filter can be brought into close contact with the vicinity of the outer periphery of the suction port of the partition plate, thereby providing a dust collector capable of sufficiently exhibiting the dust removing function as the filter of the cylindrical filter.

  According to the sixth aspect of the present invention, the drawer (dust receiver) is disposed at the bottom of the lower chamber, and the cylindrical filter is disposed on the drawer, so that the drawer can be pulled out to the outside of the housing with the open / close door opened. Since it did in this way, taking out and storing a cylindrical filter from the said dust collector becomes easy, and a dust collector with easy maintenance work can be provided. Further, it is not necessary to take out an extra space for placing the fan unit 108 as shown in FIG.

  According to the seventh aspect of the present invention, the cylindrical filter is disposed on the drawer and the drawer is housed in the lower chamber, and the cylindrical filter is pushed up and its upper end is near the outer periphery of the suction port of the partition plate. Since the lifting / lowering mechanism is provided to be in close contact with each other, it is possible to provide a dust collector that can perform maintenance work easily and can sufficiently exhibit the dust removing function as a filter of the cylindrical filter.

  According to the invention described in claim 8, the fan impeller is arranged in the lower chamber of the casing partitioned by the partition plate, the cylindrical filter is arranged in the upper chamber, the casing is provided with an opening / closing door, Since the cylindrical filter can be taken in and out of the lower chamber with the door open, the cylindrical filter can be taken out and stored just by opening the door, facilitating maintenance work and the fan at the bottom. Since it is arranged in the chamber, the heavy fan portion including the motor and the impeller is located at the lower part of the housing, so that the center of gravity is lowered and a stable dust collector that is difficult to fall can be provided.

  According to the ninth aspect of the present invention, since the pressing mechanism is provided in which the lower end of the cylindrical filter is pushed down in the state in which the cylindrical filter in the upper chamber is housed and the lower end thereof is brought into close contact with the outer periphery of the suction port of the partition plate. By pressing the upper end of the filter and bringing it close to the vicinity of the outer periphery of the suction port of the partition plate, it is possible to provide a dust collector capable of sufficiently exhibiting the dust removing function as a filter of the cylindrical filter.

  Embodiments of the present invention will be described below with reference to the drawings. 4 to 6 are diagrams showing a configuration example of the dust collector according to the present invention. FIG. 4 (a) is an external front view of the dust collector, and FIG. 4 (b) is an external perspective view of the dust collector with the open / close door opened. 4 (c) is an external perspective view showing a state in which the opening / closing door is opened and the drawer is pulled out, and FIG. 5 is a vertical sectional view of the dust collector (a cross-sectional view taken along the line AA in FIG. FIG. 6 is a diagram showing the air flow during operation of the dust collector.

  As shown in the figure, the dust collector 10 includes a cylindrical casing 11 having a rectangular cross section. A partition plate 12 is provided at a predetermined position in the housing 11, and the interior of the housing 11 is divided into an upper chamber 13 and a lower chamber 14 by the partition plate 12. A cylindrical suction port 15 is provided at the center of the partition plate 12. A fan impeller 16 is disposed in the upper chamber 13 so as to be rotatable on a horizontal plane, and a plurality of exhaust ports 17 are provided on the side wall as will be described in detail later. A cover plate 18 is attached to the upper portion of the upper chamber 13, a motor 19 is mounted on the cover plate 18, and an impeller 16 is connected to a rotating shaft 20 of the motor 19. The motor 19 is covered with a cover 27, and the fan section 28 is constituted by the impeller 16, the motor 19, the cover 27, and the like.

  An opening / closing door 22 is provided on the front side of the housing 11, and a drawer (dust receptacle) 23 described in detail later is provided on the bottom of the lower chamber 14. As shown in FIG. 4B, the drawer 23 can be pulled out of the housing 11 with the open / close door 23 open. An elevating mechanism 24 having a configuration described in detail later is provided at the bottom of the drawer 23, and a cylindrical filter 25 is arranged on the elevating mechanism 24. When the cylindrical filter 25 is pushed up by the elevating mechanism 24, the upper end portion of the cylindrical filter 25 comes into close contact with the vicinity of the outer periphery of the suction port 15 provided in the partition plate 12 via a seal member 26 such as rubber packing. ing. Further, one intake port 29 is provided on the side wall of the lower chamber 14.

  In the dust collector having the above configuration, when the motor 19 is started and the impeller 16 is rotated, the air sucked from the air inlet 29 flows into the lower chamber 14 and flows to the outer periphery of the cylindrical filter 25, and the cylindrical filter It flows from the outer peripheral side of 25 through the cylindrical filter 25 to the inner peripheral side. When passing through the cylindrical filter 25, dust in the air is captured, accumulated on the outer peripheral surface of the filter paper of the cylindrical filter 25, and dropped into the drawer 23 and collected. The air from which dust has been removed flows into the inner periphery. The air flowing into the inner peripheral side of the cylindrical filter 25 is sucked into the intake portion of the impeller 16 through the suction port 15 provided in the partition plate 12, and the impeller described in detail later from the discharge portion of the impeller 16. The air is exhausted from the exhaust port 17 through a plurality of volute type exhaust passages arranged on the outer periphery of 16. At this time, by making the upper end of the cylindrical suction port 15 as close as possible to the impeller 16 and providing the flange portion 15a on the outer periphery of the upper end, backflow from the discharge side can be prevented and fan efficiency can be improved.

  Casters 30 are provided at the four corners of the bottom surface of the casing 11. Here, since the cross section of the casing 11 is rectangular, the casters 30 can be provided at the four corners of the bottom surface of the casing 11, and the casters 30 have a casing as compared with the conventional example in which the cross section of the casing is circular. Since it does not protrude from the bottom surface of the body 11 or the amount of protrusion can be reduced, the storage space for the dust collector 10 can be reduced as compared with the case where the casing is cylindrical. Note that a flexible duct 31 is connected to the air inlet 29 so that air floating in a large amount of dust in a region intended for a construction site or the like can be sucked.

  FIG. 7 is a diagram illustrating a planar configuration example of a volute type exhaust passage disposed on the outer periphery of the impeller 16 of the upper chamber 13 of the housing 11. As shown in the figure, two volute type exhaust passages 32-1 and 32-2 are arranged on the outer periphery of the impeller 16, and the center of the two volute type exhaust passages 32-1 and 32-2 is the fan impeller 16. Arranged so as to coincide with the rotation center O, the discharge ports of the volute type exhaust passages 32-1 and 32-2 communicate with the exhaust port 17. Thus, by arranging the two volute type exhaust passages 32-1 and 32-2 on the outer periphery of the impeller 16, the lengths of two orthogonal sides of the housing 11 become D + A and D + 0.5A, respectively. In FIG. 7, D is the outer diameter of the fan impeller 16 (basic vortex diameter), A is the end point depth of the volute type exhaust passages 32-1 and 32-2, and B is the length of the exhaust port 17. Show.

  FIG. 8 is a diagram illustrating a planar configuration example of a volute type exhaust passage disposed on the outer periphery of the impeller 16 of the upper chamber 13 of the housing 11. As shown in the figure, four volute exhaust passages 32-1, 32-2, 32-3, and 32-4 are provided on the outer periphery of the impeller 16, and the four volute exhaust passages 32-1, 32-2, The centers of 32-3 and 32-4 are arranged so as to coincide with the rotation center O of the impeller 16 of the fan, and each of the volute exhaust passages 32-1, 32-2, 32-3, and 32-4 is discharged. The opening communicates with the exhaust port 17. Thus, by arranging the four volute type exhaust passages 32-1, 32-2, 32-3, and 32-4 on the outer periphery of the impeller 16, the lengths of two orthogonal sides of the casing 11 are respectively set. D + 0.5A and D + 0.5A. In FIG. 8, D is the outer diameter dimension (basic vortex diameter) of the fan impeller 16, A is the end point depth of the volute type exhaust passages 32-1, 32-2, 32-3, and 32-4, and B Indicates the length of the exhaust port 17.

  As described above, by arranging a plurality of (two or four in the figure) volute type exhaust passages 32 on the outer periphery of the fan impeller 16, the length of two orthogonal sides of the housing 11 is reduced. Thus, the storage space can be reduced as compared with the conventional dust collector having the cylindrical casing shown in FIG. FIG. 9 is a diagram showing a planar configuration example in the case where one volute type exhaust passage 32 is arranged on the outer periphery of the impeller 16 of the upper chamber 13 of the casing 11 having a rectangular cross section. As shown in FIG. 9, even when a single volute-type exhaust passage 32 is used, the lengths of two orthogonal sides are D + 1.5A and D + A, respectively, and the conventional dust collector having the cylindrical casing shown in FIG. In comparison, the storage space is slightly reduced. Further, since the dust collector 10 has the center O of the fan impeller 16 and the center of each of the volute exhaust passages 32-1 to 32-4 aligned, the position of the center of gravity of the device becomes the center of rotation, and the radial direction during operation ( The balance in the radial direction is good, and the life of the bearing (not shown) can be improved and the temperature rise of the motor 19 can be reduced.

  10 and 11 are diagrams showing the configuration of the drawer (dust receiving) and the lifting mechanism, FIG. 10 (a) is a plan view of the drawer 23 and the lifting mechanism 24, and FIG. 10 (b) is A in FIG. 10 (a). FIG. 11A is a plan view of the elevating mechanism 24, and FIGS. 11B and 11C are A arrow views of FIG. 11A. As shown in the drawing, an elevating mechanism 24 is provided at the bottom of the drawer 23, and a cylindrical filter 25 is mounted on the elevating mechanism 24. In the elevating mechanism 24, a plurality of (two in the figure) cam members 24-2 are fixed to the rotating shaft 24-1 at a predetermined interval, and an elevating operation lever 24 is provided near one end of the rotating shaft 24-1. -3 is a fixed configuration. Both ends of the rotation shaft 24-1 are rotatably supported by support members 24-4 provided on the inner wall surfaces of the drawer 23 facing each other.

  Two elevating mechanisms 24 having the above-described configuration are arranged so that the rotation shafts 24-1 and 24-1 are parallel to each other. As shown in FIGS. 11B and 11C, when the cam member 24-2 and the lifting operation lever 24-3 are tilted to the bottom surface of the drawer 23, the lifting operation lever 24-3 is rotated in the arrow B direction. When the rotating shaft 24-1 and the cam member 24-2 are rotated 90 ° in the same direction by moving, the mounting surface of the cylindrical filter 25 of the cam member 24-2 rises by the dimension U, and the cylinder As shown in FIG. 5, the upper end of the filter 25 is in close contact with the vicinity of the outer periphery of the suction port 15 provided in the partition plate 12 through a seal member 26 such as rubber packing.

  12A and 12B are diagrams illustrating a configuration example of a cylindrical filter, in which FIG. 12A is a plan view (partially cross-sectional view), and FIG. 12B is a side view (partially cross-sectional view). As shown in the figure, the cylindrical filter 25 includes an inner cylinder 25-2 in which a plate body such as a punching metal having a large number of small holes 25-1 formed on the side surface is formed in a cylindrical shape. End plates 25-4 and 25-5 are attached to the upper and lower ends of the plate 2, filter paper 25-3 folded in a zigzag shape is disposed on the outer periphery, and the upper and lower ends of the filter paper 25-3 are bonded to the end plate 25-4 with an adhesive. The structure is bonded to 25-5. The upper end plate 25-4 has an annular shape with an opening at the center, and a seal member 26 such as rubber packing is mounted on the upper surface thereof. The lower end plate 25-5 is disc-shaped and closes the lower ends of the inner cylinder 25-2 and the filter paper 25-3.

  With the cylindrical filter 25 having the above-mentioned configuration facing the upper end plate 25-4 upward, as shown in FIG. 4C, the cylindrical filter 25 is placed on the lifting mechanism 24 disposed in the drawer 23 drawn out from the housing 11. After mounting, as shown in FIG. 4B, the drawer 23 is accommodated in the housing, and the cylindrical filter 25 is raised by operating the elevating operation lever 24-3, and the end plate 25-4 at the upper end thereof is illustrated. As shown in FIG. 5, after the seal member 26 is brought into close contact with the vicinity of the outer periphery of the suction port 15 provided in the partition plate 12, the door 22 is closed and the motor 19 is started as shown in FIG. When the impeller 16 is rotated, the air sucked from the air inlet 29 flows into the inner cylinder 25-2 through the filter paper 25-3 of the cylindrical filter 25. At this time, the end plate 25-4 at the upper end of the cylindrical filter 25 is in close contact with the vicinity of the outer periphery of the suction port 15 provided in the partition plate 12 via the seal member 26, so that air does not pass through this portion reliably. Since it passes through the filter paper 25-3, dust in the air is also reliably captured.

  Further, as shown in FIGS. 4B and 5, a seal member 33 such as rubber packing is provided on the portion of the casing 11 with which the inner surface of the outer peripheral portion of the open / close door 22 abuts. Air does not enter the housing 11. In particular, when the fan is started, the inside of the housing 11 becomes a negative pressure, so that pressure is applied to the open / close door 22 from the outside, and the sealing performance is improved. When cleaning the cylindrical filter 25, from the state of FIG. 4 (a), the door 22 is opened as shown in FIG. 4 (b), and the lift control lever 24-3 is further operated to lower the cylindrical filter 25. Then, as shown in FIG. 4C, the drawer 23 is pulled out and the cylindrical filter 25 is taken out.

  When the fan is activated as described above and the inside of the housing 11 becomes negative pressure, external pressure is applied to the side wall of the housing 11. Here, since the cross section of the housing | casing 11 is rectangular shape, the problem that a side wall is dented inward generate | occur | produces. Therefore, here, as shown in FIG. 13, a reinforcing member 34 bent in a U-shaped cross section is joined to the inner wall surface 11 a of the housing 11 in the vertical direction by welding or the like to reinforce the side wall of the housing 11. . 13A is a view showing a part of the inner wall surface 11a of the housing 11, FIG. 13B is a cross-sectional view taken along the line AA of FIG. 13A, and FIG. It is BB sectional drawing.

  Further, in the dust collector having the above-described configuration, when a foreign object having a sharp edge portion such as a metal piece is mixed in the air sucked from the air inlet 29, this pierces the filter paper 25-3 of the cylindrical filter 25 and the filter paper 25. −3 may not only damage the tubular filter 25, but also dust may enter the inner peripheral side of the tubular filter 25 through the tear and the filter function of the tubular filter 25 may be impaired. Therefore, here, as shown in FIG. 14, the abutting plate 35 is provided at a position spaced apart from the air inlet 29 in the housing 11 by a predetermined distance and opposed to the air inlet 29. The corresponding plate 35 is supported by a rib plate 36 arranged in a cross shape attached to the inner wall surface 11a of the housing 11 by welding or the like. The rib plate 36 arranged in a cross shape also functions to reinforce the strength of the side wall of the housing. By providing the abutting plate 35 at a position opposite to the intake port 29 in this way, the foreign matter having a sharp edge portion sucked from the intake port 29 hits the abutment plate 35 and directly contacts the filter paper 25-3 of the cylindrical filter 25. There is no piercing and the cylindrical filter 25 is not damaged. 14A is a view showing the inside of the casing 11 of the abutment portion, FIG. 14B is a side view of the abutment plate and the rib plate, and FIG. 14C is a front view of the abutment plate and the rib plate. It is.

  15 to 17 are views showing another configuration example of the dust collector according to the present invention, FIG. 15 is a longitudinal sectional view of the dust collector, FIG. 16 is a longitudinal sectional view showing a state during cleaning of the cylindrical filter, and FIG. FIG. 3 is a longitudinal sectional view showing a state where a cylindrical filter is removed. As shown in the figure, the dust collector 10 includes a cylindrical casing 11 having a rectangular cross section. A partition plate 12 is provided at a predetermined position in the housing 11, and the housing 11 is divided into an upper chamber 13 and a lower chamber 14 by the partition plate 12. A cylindrical suction port 15 is provided at the center of the partition plate 12.

  A fan impeller 16 is disposed in the lower chamber 14 so as to be rotatable on a horizontal plane, and a volute exhaust passage similar to that shown in FIG. 7 or 8 is provided on the outer periphery of the impeller 16. An exhaust port (not shown) communicating with the volute type exhaust passage discharge port is provided on the side wall. A cover plate 18 is attached to the bottom of the lower chamber 14, and a motor 19 is attached to the cover plate 18. An impeller 16 is connected to a rotating shaft 20 of the motor 19. The motor 19 is covered with a cover 27, and the impeller 16, the motor 19, the cover 17, and the like constitute a fan unit 28. Casters 30 are attached to the squares of the cover 27 via angle members 38. The casing 11 and the fan unit 28 are the same as the casing 11 and the fan unit 28 that constitute the dust collector shown in FIGS. 4 and 5, and the cylindrical filter 25 is the same as the cylindrical filter 25 shown in FIG. 12. Something is used.

  An opening / closing door 22 is provided on the front side of the housing 11. A cylindrical filter 25 is disposed in the upper chamber 13 with its disk-shaped end plate 25-5 on top and an annular end plate 25-4 on its bottom. Further, the annular end plate 25-4 is in close contact with the vicinity of the outer periphery of the suction port 15 of the partition plate 12 via the seal member 26 so that the central opening thereof faces the suction port 15 of the partition plate 12. It is arranged. Reference numeral 37 denotes a pressing mechanism for bringing the end plate 25-4 at the lower end of the cylindrical filter 25 into close contact (pressure contact) with the partition plate 12 via the seal member 26. The pressing mechanism includes a disk-shaped plate 37-1, a nut 37-2 provided at the center of the plate 37-1, and a bolt 37-3 screwed into the nut 37-2.

  The opening / closing door 22 is opened, the cylindrical filter 25 is inserted and disposed in the upper chamber 13, the plate 37-1 of the pressing mechanism 37 is attached so as to close the upper hole 11 a (see FIG. 16) of the housing 11, and the bolt 37 3 is screwed into the nut 37-2 and lowered, and its tip (lower end) is brought into contact with and pressed against the end plate 25-5 of the cylindrical filter 25, thereby being attached to the lower end plate 25-4. The seal member 26 is in close contact with the vicinity of the outer periphery of the suction port 15 of the partition plate 12. The pressing mechanism 37 is not limited to the above-described configuration. For example, the elevating mechanism 24 as shown in FIG. 11 is provided on the upper inner wall surface of the housing 11, and the open / close door 22 is opened, and the cylindrical filter 25. Then, the cylindrical filter 25 may be pressed downward by operating the lifting operation lever 24-3 of the lifting mechanism.

  In the dust collector having the above configuration, when the motor 19 is started and the impeller 16 is rotated, the air sucked from the intake port 29 flows into the upper chamber 13 and flows to the outer periphery of the cylindrical filter 25, and the cylindrical filter It flows from the outer peripheral side of 25 through the cylindrical filter 25 to the inner peripheral side. The dust in the air is captured when passing through the cylindrical filter 25, and the air from which the dust has been removed flows into the inner peripheral side. The air flowing into the inner peripheral side of the cylindrical filter 25 is sucked into the intake portion of the impeller 16 through the suction port 15 provided in the partition plate 12, and is discharged from the discharge portion of the impeller 16 to the outer periphery of the impeller 16. The gas is exhausted from an exhaust port (not shown) through a plurality of arranged volute exhaust passages.

  When cleaning the cylindrical filter 25, as shown in FIG. 16, the pressing mechanism 37 is removed from the upper part of the housing | casing 11, the opening-and-closing door 22 is opened, and the cylindrical filter 25 is taken out and cleaned. Moreover, when cleaning the inside of the housing | casing 11, as shown in FIG. 17, the suction opening 15 provided in the partition plate 12 is obstruct | occluded with the press mechanism 37, and it does so that dust does not enter into the lower chamber 14. FIG. Note that the dust collectors shown in FIGS. 15 to 17 also employ a configuration in which a side wall is reinforced as shown in FIG. 13 and a contact plate is provided facing the air inlet as shown in FIG.

  FIG. 18 is a diagram showing the performance evaluation of the dust collector according to the present invention and the conventional dust collector. Curve A shows the performance of the dust collector according to the present invention, and curve B shows the performance of the conventional dust collector. Curve C shows the filter loss curve of the dust collector according to the present invention. As is apparent from the figure, the dust collector according to the present invention is excellent in terms of performance evaluation.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

It is a front view which shows the structural example of the conventional dust collector. It is a figure which shows the example of a plane structure of the exhaust passage of the conventional dust collector. It is a figure which shows the state which the conventional dust collector decomposed | disassembled. 4A and 4B are diagrams illustrating a configuration example of a dust collector according to the present invention, in which FIG. 4A is an external front view, FIG. 4B is an external perspective view showing a state in which the open / close door is opened, and FIG. It is an external appearance perspective view which shows the state which opened and pulled out the drawer (dust receptacle). It is a longitudinal section showing an example of composition of a dust collector concerning the present invention. It is a figure which shows the flow of the air of the dust collector which concerns on this invention. It is a figure which shows the plane structural example of the exhaust passage of the dust collector which concerns on this invention. It is a figure which shows the plane structural example of the exhaust passage of the dust collector which concerns on this invention. It is a figure which shows the example of a plane structure of the exhaust passage of a dust collector. It is a figure which shows the example of a structure of the drawer | drawing-out and raising / lowering mechanism of a dust collector which concerns on this invention, Fig.10 (a) is a top view, FIG.10 (b) is an AA cross-sectional arrow view of (a). It is a figure which shows the structural example of the raising / lowering mechanism of the dust collector which concerns on this invention, Fig.11 (a) is a top view, FIG.11 (b) and (c) are A arrow directional views of (a). It is a figure which shows the structural example of the cylindrical filter of the dust collector which concerns on this invention, Fig.12 (a) is a partial cross section top view, FIG.12 (b) is a partial cross section side view. FIG. 13A is a diagram showing a part of the inner wall surface of the dust collector according to the present invention, FIG. 13A is a diagram showing a part of the wall surface, FIG. 13B is a cross-sectional view taken along the line A-A in FIG. (C) is BB sectional drawing of (a). FIG. 14A is a side view, FIG. 14B is a side view of the suction plate and the rib plate, and FIG. 14B is a side view of the dust collector according to the present invention. It is a front view of this board and a rib board. It is a longitudinal cross-sectional view which shows the other structural example of the dust collector which concerns on this invention. It is a longitudinal cross-sectional view which shows the state at the time of the cleaning of the cylindrical filter of the dust collector which concerns on this invention. It is a longitudinal cross-sectional view which shows the state which removed the cylindrical filter of the dust collector which concerns on this invention. It is a figure which shows the performance evaluation of the dust collector which concerns on this invention, and the conventional dust collector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dust collector 11 Case 12 Partition plate 13 Upper chamber 14 Lower chamber 15 Suction port 16 Impeller 17 Exhaust port 18 Cover plate 19 Motor 20 Rotating shaft 22 Opening door 23 Drawer 24 Lifting mechanism 25 Cylindrical filter 26 Seal member 28 Fan part 29 Intake port 30 Caster 31 Flexible duct 32 Volute type exhaust passage 33 Seal member

Claims (9)

The inside of the cylindrical housing is divided into two upper and lower chambers via a partition plate, an intake port is provided on the side wall of one chamber, a cylindrical filter is disposed inside, an exhaust port is provided on the side wall of the other chamber, and an inside is provided. A fan-type impeller and a volute-type exhaust passage which is located on the outer peripheral portion of the impeller and whose discharge port communicates with the exhaust port are provided, and air sucked through the intake port by driving of the fan is supplied to the cylindrical filter. The air is sucked from the suction port provided in the partition plate from the outer peripheral side to the inner peripheral side into the intake portion of the fan impeller, and is exhausted from the exhaust port through the volute exhaust passage from the exhaust portion of the impeller. In a dust collector configured to
The cylindrical casing has a rectangular cross section, a plurality of exhaust ports, the same number of the volute exhaust passages as the exhaust ports, and the discharge ports of the volute exhaust passages connected to the exhaust ports, respectively. Dust collector characterized by. The dust collector according to claim 1,
A dust collector characterized in that the centers of the plurality of volute type exhaust passages substantially coincide with the rotation center of the fan impeller. The dust collector according to claim 1 or 2,
A dust collector, wherein a contact plate supported by a rib plate attached to an inner wall of the housing is disposed at a position facing the air inlet in the housing and spaced apart by a predetermined distance. The dust collector according to any one of claims 1 to 3,
The fan impeller is disposed in the upper chamber of the casing partitioned by the partition plate, the cylindrical filter is disposed in the lower chamber, an opening / closing door is provided on the bottom side of the casing, and the opening / closing door is opened. A dust collector configured to allow the cylindrical filter to be taken into and out of the lower chamber in a state of being in a closed state. The dust collector according to claim 4, wherein
A dust collector comprising a lifting mechanism that pushes up the cylindrical filter in a state in which the cylindrical filter in the lower chamber is housed and closes the upper end thereof to the vicinity of the outer periphery of the suction port of the partition plate. The dust collector according to any one of claims 1 to 3,
The fan is disposed in the upper chamber of the casing partitioned by the partition plate, the cylindrical filter is disposed in the lower chamber, a drawer is disposed at the bottom of the lower chamber, and the cylindrical filter is disposed on the drawer. A dust collector characterized in that the dust collector is disposed and provided with an opening / closing door on a bottom side of the housing, and the drawer can be pulled out to the outside of the housing with the opening / closing door opened. The dust collector according to claim 6,
An elevating mechanism is provided in which the cylindrical filter is disposed on the drawer, and the upper end of the cylindrical filter is pushed up in the vicinity of the outer periphery of the suction port of the partition plate while the drawer is housed in the lower chamber. Dust collector characterized by that. The dust collector according to any one of claims 1 to 3,
The fan impeller is disposed in the lower chamber of the housing partitioned by the partition plate, the cylindrical filter is disposed in the upper chamber, the door is provided in the housing, and the door is opened. A dust collector characterized in that the cylindrical filter can be taken into and out of the lower chamber. The dust collector according to claim 8, wherein
A dust collector, comprising: a pressing mechanism that presses an upper end of the cylindrical filter in a state in which the cylindrical filter is housed in the upper chamber and closes a lower end of the cylindrical filter to the vicinity of the outer periphery of the suction port of the partition plate.

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