JP2010089026A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector that suppresses dust from flying in the air during a maintenance work on its filter and makes the dust sticking to the filter easily removable therefrom. <P>SOLUTION: The dust collector for removing dust generated in a laser machine from air includes: a suction fan for sucking air; a filter disposed upstream of the suction fan and for filtering dust in the air sucked by the suction fan; a duct (pretreatment boxes 22a, 22b) disposed upstream of the filter and for introducing the air coming from the laser machine into the filter; and shield plates 26, 27 each equipped with a plurality of through-holes each penetrating the same from the front face to the back face thereof and disposed in the duct (the pretreatment boxes 22a, 22b) in a manner forming gaps to divide the inside of the duct (the pretreatment boxes 22a, 22b). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dust collector, and more particularly to a dust collector that removes dust generated from a laser processing machine from the air.

  When a workpiece such as a steel plate is cut and processed by a leather processing machine, fine cutting waste rises like dust and pollutes the air.

  Therefore, it has been common practice to remove dust from the air by sucking the dust generated from the laser processing machine together with air with a dust collector and filtering the air with a filter of the dust collector.

  The above background art is a general matter, and the applicant of the present application has no particular knowledge of documents describing this background art at the time of filing.

  In the dust collector, the filter is clogged. Therefore, when the dust collection capacity is reduced periodically or when the dust collecting capacity is lowered, the filter maintenance is performed such that the attached dust is removed from the filter.

  Here, the dust generated from the laser processing machine is extremely fine, and powder (powder) dust is attached to the filter. Therefore, in the conventional dust collector, the powdery dust rises at the time of filter maintenance, and it is difficult to maintain the filter. In particular, if an attempt is made to remove dust adhering from the filter by manual work, the work is performed while the dust rises, and maintenance work in a poor environment is forced.

  In addition, the powdery dust gets into the finer eyes of the filter. Therefore, in the conventional dust collector, dust adhered firmly to the filter, and it was difficult to remove the dust adhered from the filter.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a dust machine that makes it difficult for dust to rise during filter maintenance and that easily removes dust adhering to the filter.

The main means taken by the present invention to solve the above problems are as follows:
"It is a dust collector that removes dust generated from a laser processing machine from the air,
An intake fan that sucks in air;
A filter provided on the upstream side of the intake fan, for filtering dust in the air sucked into the intake fan;
A duct provided upstream of the filter, for introducing air from the laser processing machine into the filter;
A dust collector comprising a plurality of through-holes penetrating the front and back, and a shielding plate arranged so as to form a gap in the duct and partitioning the inside of the duct.
It is.

  In the dust collector having the above-described configuration, a duct having an internal space defined by a shielding plate is provided upstream of the filter. Therefore, the air flow from the laser processing machine to the filter is not a straight flow but a turbulent flow. The fine dust in the turbulent flow of air collides with each other and combines to change into large particles. Therefore, the fine and fine dust generated from the laser processing machine becomes a granular dust that is coarser than the powder before reaching the filter. In the dust collector configured as described above, the coarse granular dust is filtered by the filter. . In the filter that filters coarse granular dust, during maintenance, the dust is less likely to rise as compared to the conventional powdery dust, and the attached dust is easily removed.

  In particular, in the dust collector configured as described above, the shielding plate has a large number of through holes, and is arranged so as to form gaps in the duct. The flow that passes through the through hole of the shielding plate and the flow that passes through the gap between the shielding plate and the inner surface of the duct are extremely complicated. Therefore, according to the dust collector of the said structure, a fine dust can be efficiently changed into a big particle only by letting the inside of a duct pass.

  In addition, since the through-hole of a shielding board may be circular or a square, and may be a hole and a mesh, a shielding board can be comprised with a punching board, a net | network, etc.

In the means described above,
“As the shielding plate, provided with a projecting hole shielding plate having a projecting portion projecting around the through hole on at least one side of the front and back sides,
The protruding hole shielding plate is arranged with the protruding portion facing the upstream side of the air flow "
Is preferable.

  If a protrusion is provided around the hole on the upstream surface of the shielding plate, the air flowing into the through hole collides with the protrusion and changes in a complicated manner. Therefore, according to the dust collector of the said structure, the flow of the air which passes a through-hole can be made more complicated, and fine dust can be changed into a big particle more efficiently.

In the means described above,
“As the shielding plate, comprising a plurality of flat hole shielding plates in which the periphery of the through hole is flat on both the front and back surfaces,
Each flat hole shielding plate is erected from the bottom of the duct so that a gap is formed in the upper part of the duct, and from the top surface of the duct so that a gap is formed in the lower part of the duct. A dust collector characterized by being alternately arranged in a suspended state.
Is preferable.

  In the dust collector having the above configuration, the gap between the inner surface of the duct and the shielding plate is arranged in a zigzag manner in the duct, and the air flow path in the duct defined by the shielding plate is zigzag-shaped. Therefore, according to the dust collector, the flow of air passing through the duct can be made more complicated, and fine dust can be changed into large particles more efficiently.

In the means described above,
“As the shielding plate, a projecting hole shielding plate having a projecting portion projecting around the through hole on at least one surface side of the front and back, and a plurality of flat hole shielding plates in which the periphery of the through hole is flat on both the front and back surfaces; Comprising
Each flat hole shielding plate is erected from the bottom surface of the duct so that a gap is formed in the upper part of the duct, and from the top surface of the duct so that a gap is formed in the lower part of the duct. It is arranged alternately with the suspended state where it is suspended,
The projecting hole shielding plate is disposed in an inclined state from the lower end of the suspended flat hole shielding plate to the upper end of the standing flat hole shielding plate, and the projecting portion has an air flow. Dust collector characterized by being arranged toward the upstream side "
Is preferable.

  According to the dust collector of the said structure, as above-mentioned, the flow of the air which flows into a through-hole can be changed intricately, and the air flow itself in the duct divided by the shielding board is also changed intricately. be able to. Therefore, fine dust can be changed into large particles even more efficiently.

  As described above, according to the present invention, it is possible to provide a dust machine that makes it difficult for dust to rise during filter maintenance and easily removes dust adhering to the filter.

  Hereinafter, an example as an embodiment of a dust collector concerning the present invention is explained in detail according to a drawing.

  1 and 2 show an example of the dust collector 100 according to the present invention.

  The dust collector main body 10 is formed in a box shape, and the inside of the dust collector main body 10 includes a duct chamber 20, filter chambers 30a and 30b, a dusting drive chamber 40a and b, an intake chamber 50a and b, and a dust collection chamber 60a and b. It is divided into. Further, in this example, the first dust collecting unit and the second dust collecting unit are provided, and one dust collecting unit is operated as a low-capacity dust collector 100 by operating alone. The two dust collecting units can be used as a high-capacity dust collector 100 by operating them simultaneously. In the drawing, the first dust collection unit side member and the second dust collection unit side are marked with a symbol “a” on the first dust collection unit side and “b” on the second dust collection unit side. The member on the dust unit side can be clearly distinguished.

  A connection port 11 to which a duct routed from the laser processing machine is connected is provided at the lower side of the side surface of the dust collector main body 100, and air from the laser processing machine is provided in the upper intake chambers 50a and 50b. The exhaust fan 51 is sucked into the dust collector main body 10 from the connection port 11 by the intake fan 51, and is opened to the upper part of the intake chambers 50a and 50b through the duct chamber 20, the filter chambers 20a and 20b, and the discharge drive chambers 40a and 40 Is omitted). Here, the dust generated from the laser processing machine is filtered by the filter 32 of the filter chambers 30a and 30b, and clean air from which the dust has been removed is discharged from the exhaust port.

  Next, the detailed structure of the dust collector 100 of this example is demonstrated.

  The duct chamber 20 is provided with pre-processing boxes 22a and 22b constituting part of the duct for introducing air from the laser processing machine into the filter chambers 30a and 30b. Here, in this example, two pretreatment boxes 22a and 22b, such as a pretreatment box 22a for the first dust collection unit and a pretreatment box 22b for the second dust collection unit, are arranged side by side. A branch duct 21 that branches the air flowing in from the connection port 11 to the respective pretreatment boxes 22a and 22b is connected to the upstream side of the treatment boxes 22a and 22b. In addition, an on-off valve (not shown) is provided between each pretreatment box 22a, b and the branch duct 21, and when the first dust collection unit is operated alone, it is for the first dust collection unit. The on / off valve of the pretreatment box 22a is opened, while the on / off valve of the pretreatment box 22b for the second dust collection unit is closed. When both the first dust collection unit and the second dust collection unit are operated, the opening / closing valves of the pretreatment boxes 22a and 22b for the first dust collection unit and the second dust collection unit are opened.

  As shown in FIGS. 3 and 4, the pretreatment boxes 22a and 22b are formed in a rectangular parallelepiped shape, and are provided with an inflow port 24 for introducing air into one end side and an outflow port 25 for flowing out air at the other end side, respectively. The box main body 23 and a plurality of shielding plates 26 and 27 partitioning the box main body 23 are provided.

  Here, in this example, as the shielding plates 26 and 27, the flat hole shielding plate 26 having a large number of through-holes having a flat periphery, and the protruding hole having a large number of through-holes provided with projecting portions around the holes. Two types of shielding plates 26 and 27 of the shielding plate 27 are used.

  The flat hole shielding plate 26 is made of punch metal in which a large number of circular through holes having a diameter of 1 mm are formed in a staggered pattern with a pitch of 2 mm. Further, as shown in FIG. 5, the protruding hole shielding plate 27 is constituted by a metal plate in which a protruding portion 27 b is formed around the through hole 27 a on one surface side by burring processing. The holes 27a have a circular shape with a diameter of 3.5 mm and are arranged in a lattice pattern with a pitch of 20 mm. Thus, in this example, a plurality of types (two types) of shielding plates 26 and 27 having different hole sizes and arrangement positions are employed.

  As shown in FIGS. 3 and 4, a plurality of flat hole shielding plates 26 are provided, and each flat hole shielding plate 26 has a gap between the inner side of the box body 23 and the side portion in the box body 23. On the other hand, the upper and lower portions are alternately arranged in a standing state rising from the bottom surface of the box body 23 and a hanging state hanging from the top surface of the box body 23 so that a gap is formed at the upper or lower portion. Yes.

  On the other hand, the protruding hole shielding plate 27 is disposed in an inclined state from the lower end of the flat hole shielding plate 26 in the suspended state to the upper end of the flat hole shielding plate 26 in the standing state. Further, the protruding hole shielding plate 27 is disposed so that a gap is not formed between the side portion and the inner surface of the box body 23 while a gap is formed at the upper portion. Further, the protruding hole shielding plate 27 is arranged with the protruding portion around the through hole facing the upstream side of the air flow.

  Furthermore, in this example, an introduction shielding plate 28 is disposed in the most upstream portion of the box body 23. The introduction shielding plate 28 has a protruding portion around the through hole on the one surface side like the protruding hole shielding plate 27 described above, but is arranged with the protruding portion facing downstream. In addition, the introduction shield plate 28 is in an inclined state so that it contacts the upper end of the most upstream flat hole shield plate 26, the lower end contacts the lower portion of the inlet 24, and the upper end contacts the top surface of the box body 23. It is arranged by. The introduction shield plate 28 is disposed so that a gap is formed between the introduction shield plate 28 and the inner surface of the box body 23 on both sides of the introduction shield plate 28.

  Further, at the four corners of the box main body 23, additional members 29 having a triangular cross section are arranged so that air does not stagnate due to the vortex.

  The flow of air passing through such pretreatment boxes 22a and 22b becomes a very complicated flow as follows, and fine dust contained in the air collides with each other and changes to dust of large particles.

  As shown in FIG. 3, first, the air flowing in from the inflow port 24 flows around the lower sides of the introduction shield plate 28 (arrow a) and flows around the upper sides of the introduction shield plate 28 (arrow b). And a flow (arrow c) passing through the through-hole of the introduction shielding plate 28. Then, a part of the flow of the arrow a and the flow of the arrow c becomes a flow (arrow d) passing through the through hole of the flat hole shielding plate 26 in the standing state.

  The flow of the arrows b, c, and d then flows through the through hole in the lower part of the protruding hole shielding plate 27 (arrow e) and flows through the through hole of the flat hole shielding plate 26 in the suspended state (arrow). f). Then, the flow of the arrow f becomes a flow (arrow g) passing through the upper through hole of the protruding hole shielding plate 27 and a flow (arrow h) getting over the upper end of the protruding hole shielding plate 27. Moreover, the flow of the arrows e and g becomes a flow (arrow i) passing through the through hole of the flat hole shielding plate 26 in the standing state thereafter.

  Thus, the flow of air passing through the pretreatment boxes 22a and 22b becomes a very complicated flow, and the fine dust contained in the air collides with each other and efficiently changes into dust of large particles. In addition, the air passing through the through hole of the protruding hole shielding plate 27 becomes a complicated flow due to the protruding portion before entering the through hole, and from this point, fine dust is further transformed into large particle dust. Change more efficiently.

  Since the air flow in the pretreatment boxes 22a, 22b is complicated, dust easily adheres to the inner surface of the box body 23 and the shielding plates 26, 27, 28 in the pretreatment boxes 22a, 22b. . Therefore, in this example, although not shown, a hammer device that is driven by an appropriate actuator to hit the outer surface of the box body 23 is provided, and by applying an impact to the box body by the operation of the hammer device, The attached dust drops off. In addition, for the dust that has fallen off, a recovery port may be provided on the bottom surface of the box body 23 and recovered from the recovery port. However, when the dust collector 100 itself has sufficient dust collection capability. The dust that has fallen off in the pretreatment boxes 22 a and 22 b can be filtered by the filter 32 by operating the dust collector 100.

  As shown in FIGS. 1 and 2, the air containing the dust that has changed into large particles in the pretreatment boxes 22 a and b passes through the pretreatment boxes 22 a and b for the first dust collection unit and the second dust collection unit. Through dedicated connection ducts (not shown) individually connected to the outlet 25, the dust is filtered through the inlets 31a and 31b into the filter chambers 30a and 30b by the filter 32 provided in the filter chambers 30a and 30b. As a result, the air becomes clean air and is discharged from the exhaust port through the drive chambers 40a and 40b and the intake chambers 50a and 50b.

  In addition, dust collection chambers 60a and 60b are provided below the filter chambers 30a and 30b, and the dust removed from the filter 32 is collected by the collection container 62 placed in the dust collection chambers 60a and 60b. Is done. Here, the bottom surfaces of the filter chambers 30a and 30b are inclined so as to incline downward toward the waste outlet 61 communicating with the dust collection chambers 60a and 60b. The discard port 61 is provided with an on-off valve (not shown). The dust removed from the filter 32 accumulates above the closed disposal port 61, but the accumulated dust can be dropped by opening the opening / closing valve of the disposal port.

  In this example, a collection container 62 configured using a 20-liter general-purpose steel can is placed on a container base 63 that can be pulled out from the dust collection chambers 60a and 60b (see arrow A in FIG. 1). In addition, by raising the container base 63, the opening at the top of the collection container 62 can be brought into close contact with the waste outlet 61. Thereby, the dust can be always dropped to the collection container 62 by opening the opening / closing valve of the disposal port 61 while the dust collector 100 is in operation. On the other hand, when the dust accumulated in the collection container 62 is discarded, the open / close valve of the disposal port 61 is closed, the container base 63 is lowered and pulled forward, and the collection container 62 accumulated with dust is taken out from the dust collector 100. be able to. Moreover, since the filter chambers 30a and 30b can be shut off from the outside by closing the disposal port 61, the dust collector 100 can be kept operating even when the collection container 62 is taken out.

  Further, in this example, a dusting device that can automatically dust off the dust adhering to the filter 32 is adopted, and the dusting device can be used at regular intervals or when the dust collecting ability is reduced. By operating it, the dust adhering to the filter 32 can be removed without relying on manual work.

  Next, details of the pay-off device will be described.

  As shown in FIGS. 6 and 7, the filter 32 is configured to have a cylindrical filter material 36 having a bellows shape in the circumferential direction and an inner bellows portion exposed in an inner hollow portion. Here, the filter material 36 is formed in a star-shaped cross section by bending a sheet material made of thickly crumpled paper, a non-woven fabric having sufficient rigidity, or the like into a zigzag shape and bending it into an annular shape. An annular first cap 38 is provided at the upper end of the filter material 36, and a saucer-shaped second cap 37 is provided at the lower end of the filter material 36, and the filter material 36 is provided by the first cap 38. The shape of the lower end portion of the filter material 36 is held by the second cap 37.

  The dropping device includes a rotating shaft 33 that is inserted into a hollow portion of the filter material 36 that is an axial portion of the cylindrical filter 32, and a protruding piece 35 that protrudes in the radial direction of the rotating shaft 33. It is configured. A sprocket 34 (see FIGS. 1 and 2) is attached to the upper portion of the rotary shaft 33. The rotary shaft 33 is chained (not shown) by a motor installed in the drive-off drive chambers 40a and 40b. It is rotationally driven through.

  In this example, one filter unit is constituted by a total of eight filters 32 arranged in four rows in two rows on the left and right sides, and the filter chamber 30a of the first dust collecting unit and the second dust collecting unit. Two sets of filter units are arranged in the filter chamber 30b of the unit. Further, the rotary shaft 33 provided in each filter 32 is dropped at the upper portion and supported on the bottom surfaces of the drive chambers 40a and 40b so as to be rotatable but not movable up and down, and is driven to rotate in units of filter units. .

  The filter 32 is fixed to the top surfaces of the filter chambers 30a and 30b via the upper first cap 38, and is suspended from the filter chambers 30a and 30b. Here, in the conventional filter having a star-shaped cross section, in order to hold the bellows on the inner surface side of the filter material, a cylindrical core member is required in the hollow portion, but in the filter 32 of this example, The lower end portion of the rotating shaft 33 is supported by the lower second cap 37 so as to be rotatable but cannot be moved up and down. The rotating shaft 33 ensures sufficient rigidity as the filter 32.

  The protrusion 35 of the rotating shaft 33 slightly touches the bellows portion 36a on the inner side of the filter material 36 (specifically, so as to strike and bounce the bellows portion exposed to the inside of the filter material 36 as the rotating shaft 33 rotates). 1 to 5 mm). Further, the projecting piece 35 is made of a resin such as urethane rubber, and is configured to have sufficient wear resistance and appropriate elastic force.

  The rotating shaft 33 is rotated and the bellows portion 36a on the inner side of the filter material 36 is struck by the projecting piece 335, whereby the dust attached to the filter 32 can be accurately removed. Further, the filter 32 of the present example filters dust by circulating air from the outside to the inside on the peripheral surface of the filter material 36. The valley portion of the bellows as viewed from the outside (the bellows as viewed from the inside). A lot of dust adheres to the back of the mountain). Therefore, by adhering and playing the bellows portion 36a on the inner side of the filter material 36 with the projecting piece 35, the attached dust can be efficiently removed. Furthermore, in the dust collector 100 of this example, the fine dust is changed into large particles by the pre-processing boxes 22a and 22b, and the dust of the large particles is attached to the filter 32. Therefore, the dust adhering to the filter 32 can be satisfactorily dropped by hitting and flipping the filter material 36 with the projecting piece 35.

  As mentioned above, although an example of the dust collector 100 which concerns on this invention was demonstrated, the dust collector 100 which concerns on this invention is not restricted to the above-mentioned example, In the range which does not deviate from the summary of this invention, an appropriate change is possible.

  For example, the duct having a shielding plate (flat hole shielding plate 26, protruding hole shielding plate 27) inside the pretreatment boxes 22a, 22b is not limited to the one disposed in the duct chamber 20 in the dust collector body 10, It may be installed outside the dust collector main body 10 and connected to the dust collector main body 10. Further, it may be provided around the laser processing machine or in the frame of the laser processing machine and connected to the dust collector main body 10 through an appropriate connection duct. Thus, even if a duct having a shielding plate (flat hole shielding plate 26, protruding hole shielding plate 27) inside is disposed outside the dust collector main body 10, the present invention is entirely included including the duct and the dust collector main body 10. The dust collector 100 which concerns on can be comprised.

It is a front view which shows the outline inside the dust collector which concerns on this invention. It is a left view which shows the outline inside the dust collector shown in FIG. It is a longitudinal cross-sectional rear view of a pre-processing box. It is AA sectional drawing in FIG. It is a principal part cross-sectional front view of a protrusion hole shielding board. It is a partially broken perspective view of a filter. It is a cross-sectional top view of the filter shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dust collector body 11 Connection port 20 Duct chamber 21 Branch duct 22 (a, b) Pre-processing box 23 Box body 24 Inlet 25 Outlet 26 Flat hole shielding plate 27 Protruding hole shielding plate 27a Through hole 27b Protruding portion 28 Introducing shielding plate 30 (a, b) Filter chamber 31 (a, b) Inlet port 32 Filter 33 Rotating shaft 34 Sprocket 35 Projection piece 36 Filter material 36a Inner bellows portion 37 Second cap 38 First cap 40 (a, b) Drive chamber 50 (a, b) Intake chamber 51 Intake fan 60 (a, b) Dust collection chamber 61 Disposal port 62 Collection container 63 Container stand 100 Dust collector

Claims (4)

A dust collector that removes dust generated from a laser processing machine from the air,
An intake fan that sucks in air;
A filter provided on the upstream side of the intake fan, for filtering dust in the air sucked into the intake fan;
A duct provided upstream of the filter, for introducing air from the laser processing machine into the filter;
A dust collector comprising: a plurality of through holes penetrating the front and back surfaces, and a shielding plate arranged so as to form a gap in the duct and partitioning the duct. As the shielding plate, provided with a projecting hole shielding plate having a projecting portion projecting around the through hole on at least one side of the front and back,
2. The dust collector according to claim 1, wherein the protruding hole shielding plate is disposed with the protruding portion facing an upstream side of an air flow. As the shielding plate, comprising a plurality of flat hole shielding plates around the through hole on both the front and back surfaces,
Each flat hole shielding plate is erected from the bottom of the duct so that a gap is formed in the upper part of the duct, and from the top surface of the duct so that a gap is formed in the lower part of the duct. The dust collector according to claim 1 or 2, wherein the dust collector is alternately arranged in a suspended state. As the shielding plate, a projecting hole shielding plate having a projecting portion projecting around the through hole on at least one surface side of the front and back, and a plurality of flat hole shielding plates in which the periphery of the through hole is flat on both the front and back surfaces Equipped,
Each flat hole shielding plate is erected from the bottom surface of the duct so that a gap is formed in the upper part of the duct, and from the top surface of the duct so that a gap is formed in the lower part of the duct. It is arranged alternately with the suspended state where it is suspended,
The projecting hole shielding plate is disposed in an inclined state from the lower end of the suspended flat hole shielding plate to the upper end of the standing flat hole shielding plate, and the projecting portion has an air flow. The dust collector according to claim 1, wherein the dust collector is disposed toward the upstream side.

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