Dust collector

Abstract

To provide a dust collector whose filter less likely to come off.SOLUTION: A dust collector comprises: a first air chamber into which outdoor air is introduced; a filter which is arranged in the first air chamber, separates powder dust from outdoor air, and makes air pass therethrough; a second air chamber into which the air passing through the filter is introduced; a partition plate partitioning the first air chamber and the second air chamber; and a holding member arranged opposing to the partition plate to hold the filter. The filter has a main body extending in a first direction and an end part member provided at and end part in a first direction of the main body. An opening through which the main body is penetrated in the first direction is formed in the holding member. The end part member has an extending part extending to outside of the end part when viewed from the first direction to come into contact with a peripheral edge part of the opening of the holding member. A plurality of holes are formed in the extending part. The holding member has a plurality of claws formed at the peripheral edge part and inserted into the plurality of holes. The plurality of claws include protrusions that are caught by the extending part while being inserted into the plurality of holes.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a dust collector. [Background technology]

[0002] Patent Document 1 discloses a dust collector that removes dust from dust-containing air using a cylindrical filter. This dust collector includes a housing, which is partitioned into a dust chamber and a clean air chamber by a cell plate. A plurality of cylindrical filters are attached to the cell plate via a filter frame. The cylindrical filters are held by the filter frame in a state where they are positioned relative to the filter frame by inserting claws provided on the filter frame into holes provided in an upper plate of the cylindrical filter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 139083 Summary of the Invention [Problem to be solved by the invention]

[0004] In the dust collecting device described in Patent Document 1, the cylindrical filter may come off the filter frame during installation or removal. The present disclosure provides a dust collector in which the filter is less likely to come off. [Means for solving the problem]

[0005] A dust collector according to one aspect of the present disclosure includes a first air chamber into which outside air is introduced, a filter disposed in the first air chamber, which separates dust from the outside air and allows the air to pass, a second air chamber into which air that has passed through the filter is introduced, a partition plate separating the first air chamber from the second air chamber, and a holding member disposed opposite the partition plate and holding the filter. The filter has a main body extending in a first direction and an end member provided at an end of the main body in the first direction. The holding member has an opening that penetrates the main body in the first direction. The end member has an extension portion that extends outward from the end as viewed from the first direction and abuts against a peripheral portion of the opening of the holding member. A plurality of holes are formed in the extension portion. The holding member is provided on the peripheral portion and has a plurality of claws that are inserted into the plurality of holes. The plurality of claws include protrusions that are hooked onto the extension portion when inserted into the plurality of holes. Effect of the Invention

[0006] According to the present disclosure, a dust collector is provided in which the filter is unlikely to come off. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a cross-sectional view showing an overview of a dust collector according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing a filter. [Diagram 3] FIG. 3 is a cross-sectional view showing the filter. [Figure 4] FIG. 4 is a top view showing the upper filter tray. [Diagram 5] FIG. 5 is a partially enlarged view of FIG. [Figure 6] FIG. 6 is a perspective view showing the filter frame. [Figure 7] FIG. 7 is an explanatory diagram showing a method for inserting the nail into the slit. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the packing-equipped filter is attached to the filter frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated description will be omitted. The dimensional ratio of the drawings does not necessarily match that of the description. The terms "upper", "lower", "left" and "right" are based on the illustrated state and are for convenience.

[0009] [Dust collector configuration] A dust collector according to an embodiment is installed in, for example, a factory and collects dust in the air. Dust is a fine powder that can float in the air, and includes fumes generated during laser processing, plasma processing, welding, and the like.

[0010] FIG. 1 is a cross-sectional view showing an overview of a dust collector according to an embodiment. In the figure, the X and Y directions are horizontal directions, and the Z direction is vertical. Hereinafter, the Z direction is also referred to as the up-down direction. As shown in FIG. 1, the dust collector 1 includes a housing 10, an intake duct 11, and an exhaust duct 12. The housing 10 introduces outside air into the interior through an intake port 10a. The intake port 10a is provided with the intake duct 11. The housing 10 exhausts the air from which dust has been removed to the outside of the device through an exhaust port 10b. The exhaust port 10b is provided with the exhaust duct 12.

[0011] The dust collector 1 includes a first partition plate 15 (an example of a partition plate), a second partition plate 16, a dust chamber S1, a clean air chamber S2, a plurality of filters 20, and a blower 30. The internal space of the housing 10 is divided by the first partition plate 15 into a dust chamber S1 (an example of a first air chamber) which is a space below the first partition plate 15, and a clean air chamber S2 (an example of a second air chamber) which is a space above the first partition plate 15. The first partition plate 15 is a plate that separates the dust chamber S1 and the clean air chamber S2. The periphery of the first partition plate 15 is connected to the inner wall surface of the housing 10 in an airtight state.

[0012] The dust chamber S1 is a room into which outside air to be collected is introduced. The dust chamber S1 communicates with the outside of the device through the air intake 10a. The filter 20 is accommodated in the dust chamber S1. The filter 20 separates dust from the outside air introduced into the dust chamber S1 and allows the air to pass through. The filter 20 extends in a direction intersecting the lower surface 15a of the first partition plate 15. The filter 20 extends, for example, in a direction perpendicular to the lower surface 15a (Z direction). The filter 20 is, for example, cylindrical with the Z direction as its axial direction, and the upper end of the filter 20 is airtightly connected to an inlet formed in the first partition plate 15. As a result, the filter 20 is arranged in the dust chamber S1 so as to hang down from the first partition plate 15. In this embodiment, nine filters 20 are arranged in three rows in the X direction and the Y direction. The first partition plate 15 is formed with the same number of inlets as the filters 20.

[0013] The clean air chamber S2 is a chamber into which air that has passed through the filter 20 and from which dust has been removed is introduced. The blower 30 is housed in the clean air chamber S2. The blower 30 is, for example, a blower, and includes an impeller blade 30a and a motor 30b. The blower 30 generates an airflow toward the exhaust port 10b in the clean air chamber S2. This creates a negative pressure in the dust chamber S1, and outside air is sent into the dust chamber S1 from the intake port 10a of the dust chamber S1.

[0014] That is, when the impeller blades 30a are rotated by the motor 30b, outside air containing dust is introduced into the dust chamber S1 via the intake duct 11 and the intake port 10a. The air containing dust passes from the outer peripheral surface of the filter 20 to the inner peripheral surface of the filter 20, and is separated into air and dust. The air from which the dust has been removed (clean air) passes from the internal space of the filter 20 through the blower 30, passes through the exhaust port 10b and the exhaust duct 12, and is discharged outside the dust collector 1.

[0015] The clean air chamber S2 may be further divided by the second partition plate 16 into a reduced pressure chamber S21, which is a space below the second partition plate 16, and an exhaust chamber S22, which is a space above the second partition plate 16. The periphery of the second partition plate 16 is airtightly connected to the inner wall surface of the housing 10. The second partition plate 16 is provided with an opening (not shown) for airtight connection to the blower 30. The reduced pressure chamber S21 communicates with the dust chamber S1 through an inlet provided in the first partition plate 15. The exhaust chamber S22 communicates with the reduced pressure chamber S21 through the blower 30 and has an exhaust port 10b. The blower 30 is airtightly provided in an opening formed in the second partition plate 16. The blower 30 creates a negative pressure in the reduced pressure chamber S21 by blowing air from the reduced pressure chamber S21 to the exhaust chamber S22. As a result, the dust chamber S1 communicating with the decompression chamber S21 also becomes negative pressure, and outside air is sent into the dust chamber S1 through the intake port 10a.

[0016] The dust collector 1 includes a dust removal device 31, a dust box 32, and a control unit 36. The dust removal device 31 is disposed in the clean air chamber S2. As an example, the dust removal device 31 is disposed in the decompression chamber S21. The dust removal device 31 removes dust adhering mainly to the outer peripheral surface of the filter 20 by blowing compressed air into the inside of the filter 20 in pulses. The dust removal device 31 operates at predetermined time intervals to periodically remove dust adhering to the filter 20.

[0017] In the dust chamber S1, a dust box 32 is disposed below the filter 20. The dust box 32 is a box body with an open top, and receives dust that falls from the filter 20.

[0018] The clean air chamber S2 is provided with a control unit 36. The control unit 36 ​​is a controller that controls the dust collector 1. The control unit 36 ​​is configured as, for example, a PLC (Programmable Logic Controller). The control unit 36 ​​may be configured as a computer system including a processor such as a CPU (Central Processing Unit), memories such as a RAM (Random Access Memory) and a ROM (Read Only Memory), input / output devices such as a touch panel, a mouse, a keyboard, and a display, and a communication device such as a network card. The control unit 36 ​​operates each component of the dust collector 1 under the control of the processor based on a computer program stored in the memory.

[0019] FIG. 2 is a perspective view showing the filter. FIG. 3 is a cross-sectional view showing the filter. FIG. 4 is a top view showing the filter upper tray. The filter 20 shown in FIGS. 1 to 4 is a replaceable cartridge filter. The filter 20 is replaced, for example, by removing the side wall 10c of the housing 10. The filter 20 has a cylindrical main body 21, a filter upper tray (an example of an end member) 22 provided at an upper end (an example of an end) 21a of the main body 21, and a filter lower tray 23 provided at a lower end 21b of the main body 21. The upper end 21a and the lower end 21b are each an end of the main body 21 in the Z direction.

[0020] The main body 21 is formed by pleating a material such as paper or cloth. In this embodiment, the main body 21 is made of nonwoven fabric. The main body 21 is, for example, cylindrical. The main body 21 is placed in the dust chamber S1 with the longitudinal direction aligned with the Z direction. The outer peripheral surface of the main body 21 faces the dust chamber S1, and the internal space of the main body 21 communicates with the clean air chamber S2.

[0021] The filter upper tray 22 is an annular plate member with an opening 22a formed in the center. The filter upper tray 22 is, for example, annular. The filter upper tray 22 is formed of metal, resin, or the like. The filter upper tray 22 has a covering portion 24 that covers the upper end portion 21a of the main body 21, and a flange-shaped extending portion 25. When viewed from the direction along the central axis of the main body 21 (Z direction), the extending portion 25 extends outside the upper end portion 21a of the filter 20. The extending portion 25 has a groove shape and surrounds the upper end portion 21a along the side surface of the main body 21. Such a groove shape increases the strength of the extending portion 25, so that the filter 20 can be reliably supported by the extending portion 25.

[0022] The extension portion 25 includes an inner wall 25a covering the side surface of the upper end portion 21a, an outer wall 25b facing the inner wall 25a, and a bottom wall 25c connecting the lower end of the inner wall 25a to the lower end of the outer wall 25b. A plurality of slits 26 (an example of holes) are formed in the bottom wall 25c. The slits 26 are elongated holes extending along the side surface of the main body 21. The plurality of slits 26 have the same shape as one another.

[0023] The shapes of the multiple slits 26 are rotationally symmetric with respect to the central axis of the main body 21. In this embodiment, the number of slits 26 is two. The two slits 26 are arranged, for example, at an angular interval of less than 180 degrees. That is, when viewed from the direction along the central axis of the main body 21, the two slits 26 are arranged such that the angle formed by the line segment connecting the slits 26 and the central axis of the main body 21 is less than 180 degrees. In this way, the multiple slits 26 are arranged so as not to be point-symmetric with respect to the central axis, so that the position of the filter 20 around the central axis can be identified by the position of the slit 26.

[0024] The filter lower tray 23 is a plate member that seals the entire lower end portion 21b. The filter lower tray 23 has, for example, a circular shape. The filter lower tray 23 is made of metal, resin, or the like.

[0025] Fig. 5 is a partially enlarged view of Fig. 1. In Fig. 5, the rail member 14 on the front side is omitted. As shown in Fig. 1 and Fig. 5, the dust collector 1 includes packings 13, rail members 14, and a filter frame 40 (an example of a holding member). In this embodiment, the dust collector 1 includes the same number of packings 13 as the number of filters 20, three pairs of rail members 14, and three filter frames 40.

[0026] The packing 13 is attached on the filter upper tray 22 and airtightly seals the gap between the filter upper tray 22 and the first partition plate 15. The packing 13 is an annular plate member with an opening formed in the center. The packing 13 is, for example, annular. The packing 13 is made of rubber, resin material, or the like. The packing 13 is attached to the covering portion 24 by, for example, adhesion.

[0027] The rail members 14 support the filter frame 40 and allow the filter frame 40 to slide along the first partition plate 15. In this embodiment, a pair of rail members 14 is provided for each filter frame 40. That is, the dust collector 1 includes three pairs of rail members 14. The pair of rail members 14 extend along the Y direction and are attached to the first partition plate 15 so as to sandwich the corresponding filter frame 40 in the X direction. The rail members 14 include parallel sliding surfaces 14a and inclined sliding surfaces 14b.

[0028] The parallel sliding surface 14a extends parallel to the first partition plate 15 and moves the filter frame 40 parallel to the first partition plate 15. The inclined sliding surface 14b inclines upward toward the first partition plate 15 and guides the filter frame 40 to the lower surface of the first partition plate 15. The inclined sliding surface 14b is provided at one end of the rail member 14 in the Y direction. The inclined sliding surface 14b faces a side wall 10d located on the opposite side of the side wall 10c that is removed when replacing the filter 20.

[0029] FIG. 6 is a perspective view showing the filter frame. As shown in FIG. 1, FIG. 5, and FIG. 6, the filter frame 40 is disposed in the dust chamber S1 facing the first partition plate 15 in the Z direction and holds the filter 20. The filter frame 40 has a first surface 40a facing the first partition plate 15 in the Z direction and a second surface 40b facing the opposite side of the first surface 40a. The filter frame 40 has an opening 41 that penetrates the main body 21 in the Z direction. The opening 41 is formed to a size that allows the main body 21 and the filter lower plate 23 to penetrate, but does not allow the filter upper plate 22 to penetrate. The opening 41 is circular and has an inner diameter that matches the outer diameter of the main body 21. In this embodiment, the dust collector 1 includes three filter frames 40 in the form of a rectangular plate. In each filter frame 40, three openings 41 are formed side by side at regular intervals in the long side direction of the filter frame 40.

[0030] The filter frame 40 has a plurality of claws 42 provided on the periphery 41a of the opening 41 on the first surface 40a. The plurality of claws 42 protrude from the first surface 40a. The plurality of claws 42 are provided at positions corresponding to the plurality of slits 26. In this embodiment, the number of claws 42 is two, which is the same as the number of slits 26. The two claws 42 are arranged, for example, at an angular interval of less than 180 degrees, like the two slits. When the filter frame 40 holds the filter 20, the plurality of claws 42 are inserted into the plurality of slits 26, and the periphery 41a of the opening 41 abuts against the extension portion 25 of the filter 20. The filter 20 is positioned with respect to the filter frame 40 by inserting the plurality of claws 42 into the plurality of slits 26.

[0031] 7 is an explanatory diagram of a method for inserting the claw into the slit. As shown in FIG. 7, the claw 42 is a so-called barbed claw, and includes a plurality of protrusions 43, 44 that hook onto the extending portion 25 when inserted into the slit 26. The plurality of protrusions 43, 44 protrude in opposite directions from each other along the peripheral portion 41a. The plurality of protrusions 43, 44 are at different height positions from the peripheral portion 41a (first surface 40a). Since the claw 42 thus includes a plurality of protrusions 43, 44 that hook onto the extending portion 25, the filter 20 is even less likely to come off the filter frame 40.

[0032] The protrusion 43 has an opposing portion 43a that faces the first surface 40a. When the claw 42 is fully inserted into the slit 26, the extension portion 25 is disposed in the space between the first surface 40a and the opposing portion 43a. Therefore, the protrusion 43 is caught by the extension portion 25. The protrusion 44 has an opposing portion 44a that faces the first surface 40a. When the claw 42 is partially inserted into the slit 26, the extension portion 25 is disposed in the space between the first surface 40a and the opposing portion 44a. Therefore, the protrusion 44 is caught by the extension portion 25.

[0033] The protrusion 44 is provided at the top of the claw 42. The claw 42 further has a protrusion 45 provided at the base of the claw 42. The protrusion 45 protrudes in the same direction as the protrusion 44. There is no space between the protrusion 45 and the first surface 40a in which the extension portion 25 is disposed. Therefore, the protrusion 45 is not caught by the extension portion 25. The protrusion 43 is provided at an intermediate portion located between the top and base of the claw 42. That is, in the height direction of the claw 42, the protrusion 43 is located between the protrusion 44 and the protrusion 45. The top of the claw 42 has a tapered shape that narrows as it moves away from the first surface 40a. The claw 42 has an inclined portion 46 that connects the top of the claw 42 and the tip of the protrusion 43. The shapes of the multiple claws 42 are rotationally symmetrical with respect to the central axis of the filter 20.

[0034] An example of a method for inserting the claw 42 into the slit 26 will be described. First, the slit 26 is placed on the claw 42, and then the slit 26 is moved along the inclined portion 46 toward the peripheral portion 41a as shown in FIG. 7(a). This causes the top of the claw 42 on which the protrusion 44 is provided to pass through the slit 26. Next, the slit 26 is moved toward the peripheral portion 41a. This causes the middle portion of the claw 42 on which the protrusion 43 is provided to pass through the slit 26 as shown in FIG. 7(b). In the state of FIG. 7(b), the protrusion 44 is caught by the extension portion 25.

[0035] Finally, as shown in FIG. 7(c), the slit 26 is moved in the protruding direction of the protrusion 45 along the peripheral portion 41a. As a result, the base of the claw 42 on which the protrusion 45 is provided is disposed in the slit 26, and the extension portion 25 comes into contact with the peripheral portion 41a. In the state of FIG. 7(c), the protrusion 43 is caught by the extension portion 25. When the claw 42 is to be removed from the slit 26, the slit 26 is moved in the opposite direction to the direction in which the claw 42 is inserted into the slit 26. As described above, the shapes of the multiple claws 42 are rotationally symmetrical with respect to the central axis of the filter 20, so that the multiple claws 42 can be inserted into and removed from the multiple slits 26 simultaneously while rotating the filter 20 together with the filter upper plate 22.

[0036] Fig. 8 is a cross-sectional view showing the state in which the filter with packing is attached to the filter frame. As shown in Fig. 6 and Fig. 8, the packing 13 is provided on the filter upper tray 22. The packing 13 may be provided before the filter 20 is attached to the filter frame 40, or may be provided after the filter 20 is attached to the filter frame 40.

[0037] The filter frame 40 has a gripping portion 51, a limiting portion 52, a pair of reinforcing portions 53, and a plurality of reinforcing portions 54. The gripping portion 51 is provided at one end of the long side direction of the second surface 40b, and protrudes in the opposite direction to the claws 42. The gripping portion 51 is a plate member extending in the short side direction of the second surface 40b. The gripping portion 51 is a portion that is gripped by hand when moving the filter frame 40. The gripping portion 51 is located closer to the side wall 40c and faces the side wall 40c. The gripping portion 51 may be provided with a notch 51a. In this case, even if there is not enough space below the gripping portion 51, it is easy to insert a hand under the gripping portion 51.

[0038] The limiting portion 52 is provided on the first surface 40a and protrudes toward the first partition plate 15. The limiting portion 52 is a rib-shaped plate member extending in the short side direction of the first surface 40a. The limiting portion 52 abuts against the first partition plate 15 to limit the amount of compression of the packing 13. The limiting portion 52 prevents the packing 13 from being damaged due to excessive compression. As a result, a decrease in sealing performance is suppressed. The limiting portion 52 is provided between the gripping portion 51 and the opening 41 closest to the gripping portion 51.

[0039] The pair of reinforcing parts 53 are provided on the second surface 40b. The pair of reinforcing parts 53 are formed by bending a pair of ends in the long side direction of the second surface 40b 90 degrees to the opposite side to the claw 42. The reinforcing parts 53 are plate members extending along the long side direction of the second surface 40b. The multiple reinforcing parts 54 are provided on the second surface 40b. The multiple reinforcing parts 54 are ribs extending in the short side direction of the second surface 40b. In this embodiment, the multiple reinforcing parts 54 are provided in the same number as the multiple openings 41. One reinforcing part 54 is provided between the other end in the long side direction of the second surface 40b and the opening 41 closest to the other end. The remaining reinforcing parts 54 are provided between adjacent openings 41.

[0040] The filter frame 40 is provided with a hole 55 used when attaching the filter frame 40 to the first partition plate 15, and a notch-shaped recess 56. The hole 55 penetrates the filter frame 40 between the gripping portion 51 and the limiting portion 52. The recess 56 is provided at the other end of the filter frame 40 in the long side direction.

[0041] [How to replace the filter] An example of a method for replacing the filter 20 will be described. The replacement of the filter 20 is performed with the operation of the dust collector 1 stopped. When attaching the filter 20, first, as described above with reference to FIG. 7, the claws 42 of the filter frame 40 are passed through the slits 26 of the filter upper tray 22, and the filter 20 is installed on the filter frame 40. Next, the side wall 10c of the housing 10 is removed, and the filter frame 40 holding the filter 20 is inserted between the pair of rail members 14. Since the side wall 10c of this embodiment constitutes the side walls of the dust chamber S1 and the reduced pressure chamber S21, the dust chamber S1 and the reduced pressure chamber S21 are opened by removing the side wall 10c, but it is sufficient that at least the dust chamber S1 is opened.

[0042] Next, the gripping portion 51 is gripped and the filter frame 40 is pushed to the back of the housing 10. The tip of the filter frame 40 slides on the parallel sliding surface 14a to move parallel to the first partition plate 15, and then slides on the inclined sliding surface 14b to move upward. The filter frame 40 is pushed to a position where the recess 56 of the filter frame 40 abuts on the stopper 58 provided on the first partition plate 15. Next, the gripping portion 51 side of the filter frame 40 is lifted toward the first partition plate 15, and the filter frame 40 is pushed up by the knob nut 57. The knob nut 57 is inserted into the hole 55 of the filter frame 50. The filter frame 40 is pushed up until the limiting portion 52 abuts against the first partition plate 15. As a result, the packing 13 is pressed against the first partition plate 15, and the sealing between the filter upper plate 22 and the first partition plate 15 is ensured.

[0043] When removing the filter 20, the side wall 10c of the housing 10 is removed, and the knob nut 57 is loosened and removed. As a result, the weight of the filter 20 and the filter frame 40 lowers the gripping portion 51 side of the filter frame 40 to the parallel sliding surface 14a. If the packing 13 is attached to the first partition plate 15, a downward force is applied to the filter frame 40 to peel off the packing 13 from the first partition plate 15, and the gripping portion 51 side of the filter frame 40 is lowered to the parallel sliding surface 14a. Since the claws 42 are caught on the extensions 25 and the filter 20 is difficult to remove from the filter frame 40, applying force to the filter 20 via the filter frame 40 in this manner allows the packing 13 to be easily peeled off from the first partition plate 15.

[0044] Next, gripping portion 51 is gripped and filter frame 40 is pulled towards the user, and filter frame 40 with filter 20 attached thereto is pulled out of housing 10. Finally, as described above, slits 26 are moved in the opposite direction to the direction in which claws 42 were inserted into slits 26, and claws 42 are pulled out of slits 26, thereby removing filter 20 from filter frame 40.

[0045] [Summary of the embodiment] As described above, in the dust collector 1, the multiple claws 42 provided on the peripheral portion 41a of the opening 41 of the filter frame 40 that holds the filter 20 include the projections 43, 44 that are hooked onto the extended portion when inserted into the multiple slits 26 provided in the extended portion 25 of the filter upper tray 22 that covers the upper end portion 21a of the filter 20. Therefore, the filter 20 is unlikely to come off the filter frame 40.

[0046] [Variations] Although various exemplary embodiments have been described above, various omissions, substitutions, and modifications may be made without being limited to the above-described exemplary embodiments. For example, the main body 21 of the filter 20 may be an elliptical cylinder with the Z direction as the axial direction, or a polygonal cylinder such as a square cylinder. The main body 21 may be a bottomed cylinder with the lower end 21b closed as long as the upper end 21a is open. In this case, the filter 20 may not have a filter lower plate 23. The main body 21 may be, for example, a flat plate having a rectangular main surface as long as it extends at least in the Z direction so as to hang down from the first partition plate 15. The flat plate-shaped main body 21 may be, for example, formed in a bag shape with one side forming the upper end 21a open and three sides closed. In this case, the filter 20 may also not have a filter lower plate 23. The claw 42 may not include the protrusion 44 as long as it includes at least the protrusion 43, or may further include a protrusion that hooks onto the extension portion 25 in addition to the protrusions 43 and 44. The clean air chamber S2 does not have to be partitioned by the second partition plate 16.

[0047] [Forms included in this disclosure] The present disclosure includes the aspects described in the following clauses.

[0048] (Clause 1) A dust collector according to one embodiment of the present disclosure comprises a first air chamber into which outside air is introduced, a filter disposed in the first air chamber, which separates dust from the outside air and allows air to pass through, a second air chamber into which the air that has passed through the filter is introduced, a partition plate separating the first air chamber and the second air chamber, and a retaining member disposed opposite the partition plate and holding the filter, wherein the filter has a main body extending in a first direction and an end member provided at an end of the main body in the first direction, the retaining member has an opening formed therein that penetrates the main body in the first direction, the end member has an extension portion that extends outward from the end when viewed from the first direction and abuts against a peripheral portion of the opening of the retaining member, a plurality of holes are formed in the extension portion, the retaining member is provided on the peripheral portion and has a plurality of claws that are inserted into the plurality of holes, and the plurality of claws include protrusions that hook onto the extension portion when inserted into the plurality of holes.

[0049] According to this dust collector, a plurality of claws provided on the peripheral edge of the holding member that holds the filter include protrusions that catch on the extension portion when inserted into a plurality of holes provided on the extension portion of the end member that covers the end portion of the filter, so that the filter is less likely to come off the holding member.

[0050] (Clause 2) The dust collector described in clause 1 further includes a packing that is attached to the end member and seals between the end member and the partition plate, and the holding member may have a limiting portion that is provided on a surface facing the partition plate and abuts against the partition plate to limit the amount of compression of the packing. In this case, even if the packing sticks to the partition plate, the filter is unlikely to come off the holding member, so that the packing can be easily peeled off from the partition plate by applying a force to the filter via the holding member in a direction away from the partition plate. In addition, the packing is prevented from being damaged due to excessive compression. As a result, deterioration of sealing performance is prevented.

[0051] (Clause 3) In the dust collector described in clause 1 or 2, the main body may be cylindrical with an axial direction parallel to the first direction, and the shapes of the claws may be rotationally symmetrical with respect to a central axis of the filter. In this case, the claws can be inserted into and removed from the holes simultaneously while rotating the filter together with the end member.

[0052] (Clause 4) In the dust collector described in any one of clauses 1 to 3, the claws may include a plurality of the projections that are located at different heights from the peripheral edge and that project in opposite directions from each other. In this case, the filter is even less likely to come off the holding member.

[0053] (Clause 5) The dust collector described in any one of clauses 1 to 4 may further include a rail member that supports the holding member and slides the holding member along the partition plate, and the holding member may have a grip portion provided on a surface facing the opposite side of the partition plate. In this case, the holding member can be moved by the rail member to attach or detach a filter. Also, even in a configuration in which there is not enough space between the holding member and the partition plate, an operator can easily grip the grip portion. [Explanation of symbols]

[0054] 1...dust collector, 13...gasket, 14...rail member, 15...first partition plate (an example of a partition plate), 20...filter, 21...main body, 21a...upper end portion (an example of an end portion), 22...filter upper tray (an example of an end member), 25...extension portion, 26...slit (an example of a hole), 40...filter frame (an example of a holding member), 40a...first surface, 40b...second surface, 41...opening, 41a...periphery, 42...claws, 43, 44...protrusions, 51...gripping portion, 52...restriction portion, S1...dust chamber (an example of a first air chamber), S2...clean air chamber (an example of a second air chamber).

Claims

1. a first air chamber into which outside air is introduced; A filter disposed in the first air chamber, the filter separating dust from the outside air and allowing air to pass through; a second air chamber into which the air that has passed through the filter is introduced; a partition plate separating the first air chamber and the second air chamber; a holding member disposed opposite the partition plate and holding the filter, The filter has a main body extending in a first direction and an end member provided at an end of the main body in the first direction, The holding member has an opening formed therein through which the main body passes in the first direction, the end member has an extension portion that extends outward from the end when viewed from the first direction and abuts against a peripheral portion of the opening of the holding member, The extension portion has a plurality of holes formed therein, the holding member is provided on the peripheral portion and has a plurality of claws to be inserted into the plurality of holes, The plurality of claws includes a protrusion that is hooked onto the extension portion when inserted into the plurality of holes. Dust collector.

2. Further, a packing is attached on the end member to seal between the end member and the partition plate, The retaining member has a limiting portion provided on a surface facing the partition plate and abutting against the partition plate to limit a compression amount of the packing. The dust collector of claim 1.

3. The main body has a cylindrical shape with an axial direction aligned in the first direction, The shapes of the plurality of claws are rotationally symmetrical with respect to the central axis of the filter.

3. A dust collector according to claim 1 or 2.

4. The plurality of claws include a plurality of the protrusions that are located at different height positions from the peripheral edge portion and protrude in opposite directions to each other.

3. A dust collector according to claim 1 or 2.

5. a rail member that supports the holding member and allows the holding member to slide along the partition plate; The holding member has a gripping portion provided on a surface facing the opposite side to the partition plate.

3. A dust collector according to claim 1 or 2.

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