Dust collector

Abstract

The present invention relates to a dust collector comprising: a first air chamber into which external air is introduced; a filter that is disposed in the first air chamber, separates dust from outside air, and allows air to pass therethrough; a second air chamber into which the air that has passed through the filter is introduced; a partition plate that partitions the first air chamber and the second air chamber; and a holding part which is arranged opposite to the partition plate and holds 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. An opening through which the main body passes in the first direction is formed in the holding member. The end member has an extension portion that extends outward of the end portion when viewed from the first direction, and that comes into contact with the peripheral edge portion of the opening of the holding member. A plurality of holes are formed in the extension portion. The holding member has a plurality of claws provided on the peripheral portion and inserted into the plurality of holes. The plurality of claws include protrusions that are hooked to the extension portions in a state of being inserted into the plurality of holes.

Description

Technical Field

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

[0002] International Publication No. 2018 / 139083 discloses a dust collecting device for removing dust from dust-containing air through a cylindrical filter. The dust collecting device includes a housing, which is divided into a dust chamber and a clean air chamber by a unit plate. A plurality of cylindrical filters are mounted on the unit plate through a filter frame. The cylindrical filter is inserted into a hole portion of an upper disk of the cylindrical filter through a claw provided on the filter frame, thereby being held in the filter frame in a state of being positioned relative to the filter frame. Summary of the invention

[0003] In the above dust collecting device, the cylindrical filter may fall off from the filter frame during the installation and removal operations of the cylindrical filter. The present invention provides a dust collector in which the filter is not easily fallen off.

[0004] The dust collector involved in one aspect of the present disclosure comprises: a first air chamber for introducing external air; a filter arranged in the first air chamber to separate dust from external air and allow air to pass through; a second air chamber for introducing air that has passed through the filter; a partition to separate the first air chamber from the second air chamber; and a retaining member arranged opposite to the partition to retain the filter. The filter has a main body extending in a first direction and an end member arranged at the end of the main body in the first direction. An opening is formed in the retaining member so that the main body passes through in the first direction. The end member has an extension portion, which extends toward the outside of the end portion when viewed from the first direction and abuts against the peripheral portion of the opening of the retaining member. A plurality of holes are formed in the extension portion. The retaining member has a plurality of claws, which are arranged at the peripheral portion and are inserted into the plurality of holes. The plurality of claws include protrusions that are hooked on the extension portion when inserted into the plurality of holes.

[0005] According to the present disclosure, a dust collector is provided in which a filter is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a cross-sectional view schematically showing a dust collector according to one embodiment.

[0007] Figure 2 It is a perspective view showing a filter.

[0008] Figure 3 is a cross-sectional view showing a filter.

[0009] Figure 4 It is a top view showing the filter upper plate.

[0010] Figure 5 yes Figure 1A partial enlarged view of .

[0011] Figure 6 It is a perspective view showing a filter frame.

[0012] Figure 7 This is an explanatory diagram regarding a method of inserting a claw into a slit.

[0013] Figure 8 It is a cross-sectional view showing a state where the filter with a seal is mounted on the filter frame.

[0014] Description of Reference Numerals

[0015] 1…dust collector; 13…seal; 14…guide member; 15…first partition (an example of a partition); 20…filter; 21…main body; 21a…upper end (an example of an end); 22…filter upper plate (an example of an end member); 25…extension portion; 26…slit (an example of a hole); 40…filter frame (an example of a retaining member); 40a…first surface; 40b…second surface; 41…opening; 41a…peripheral portion; 42…claw; 43, 44…protrusions; 51…gripping portion; 52…limiting portion; S1…dust chamber (an example of a first air chamber); S2…clean air chamber (an example of a second air chamber). DETAILED DESCRIPTION

[0016] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the accompanying drawings, the same elements are marked with the same reference numerals, and repeated descriptions are omitted. The dimensional ratios of the accompanying drawings are not necessarily consistent with the contents of the description. The terms "upper", "lower", "left" and "right" are based on the states shown in the drawings and are for convenience.

[0017] [Structure of dust collector]

[0018] The dust collector according to one embodiment is placed in a factory, for example, to collect dust in the air. Dust refers to powder that is so fine that it can float in the air, including smoke generated during laser processing, plasma processing, welding, and the like.

[0019] Figure 1 1 is a cross-sectional view showing an overview of a dust collector according to an embodiment. The X direction and the Y direction in the figure are horizontal directions, and the Z direction is a vertical direction. The Z direction is also referred to as the up-down direction hereinafter. Figure 1 As shown, the dust collector 1 includes a housing 10, an air intake duct 11 and an exhaust duct 12. The housing 10 introduces external air into the interior through an air intake port 10a. An air intake duct 11 is provided at the air intake port 10a. The housing 10 discharges the air from which dust has been removed to the outside of the device through an exhaust port 10b. An exhaust duct 12 is provided at the exhaust port 10b.

[0020] 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) as a space below the first partition plate 15 and a clean air chamber S2 (an example of a second air chamber) as a space above the first partition plate 15. The first partition plate 15 is a plate that separates the dust chamber S1 from 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.

[0021] The dust chamber S1 is a compartment for introducing external air that is the object of dust collection. The dust chamber S1 is connected to the outside of the device through the air inlet 10a. The filter 20 is accommodated in the dust chamber S1. The filter 20 separates dust from the external air introduced into the dust chamber S1 and allows air to pass through. The filter 20 extends in a direction intersecting the lower surface 15a of the first partition 15. The filter 20 extends, for example, in a direction (Z direction) orthogonal to the lower surface 15a. The filter 20 is, for example, cylindrical with the Z direction as the axial direction, and the upper end of the filter 20 is airtightly connected to the inlet formed on the first partition 15. Thus, the filter 20 is arranged in the dust chamber S1 in a manner hanging from the first partition 15. In the present embodiment, 9 filters 20 are arranged in 3 rows each along the X direction and the Y direction. The first partition 15 is formed with the same number of inlets as the filter 20.

[0022] The clean air chamber S2 is a compartment for introducing air that has passed through the filter 20 and has been free of dust. The blower 30 is housed in the clean air chamber S2. The blower 30 is, for example, a blower, and is provided with an impeller blade 30a and a motor 30b. The blower 30 generates an air flow toward the exhaust port 10b in the clean air chamber S2. As a result, the dust chamber S1 becomes negative pressure, and external air is sent into the dust chamber S1 from the air inlet 10a of the dust chamber S1.

[0023] That is, when the impeller blades 30a are rotated by the motor 30b, the external air containing dust is introduced into the dust chamber S1 through the air intake duct 11 and the air 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 (clean air) from which dust is removed passes through the air blower 30 from the internal space of the filter 20, and is discharged to the outside of the device of the dust collector 1 through the exhaust port 10b and the exhaust duct 12.

[0024] The clean air chamber S2 can also be further divided into a decompression chamber S21 as a space on the lower side of the second partition 16 and an exhaust chamber S22 as a space on the upper side of the second partition 16 by the second partition 16. The periphery of the second partition 16 is connected to the inner wall surface of the housing 10 in an airtight state. An opening (not shown) for airtight connection with the blower 30 is provided in the second partition 16. The decompression chamber S21 is connected to the dust chamber S1 through the inlet provided in the first partition 15. The exhaust chamber S22 is connected to the decompression chamber S21 through the blower 30 and has an exhaust port 10b. The blower 30 is airtightly provided at the opening formed in the second partition 16. The blower 30 blows air from the decompression chamber S21 to the exhaust chamber S22, thereby making the decompression chamber S21 a negative pressure. As a result, the dust chamber S1 connected to the decompression chamber S21 also becomes a negative pressure, and the external air is sent to the dust chamber S1 from the air inlet 10a.

[0025] 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 dusts off the dust mainly attached to the outer peripheral surface of the filter 20 by blowing compressed air into the filter 20 in a pulsed manner. The dust removal device 31 operates at a predetermined time interval to regularly remove the dust attached to the filter 20.

[0026] In the dust chamber S1, a dust box 32 is disposed below the filter 20. The dust box 32 is a box having an open top surface, and contains dust dropped from the filter 20.

[0027] A control unit 36 ​​is provided in the clean air chamber S2. The control unit 36 ​​is a controller that centrally controls the dust collector 1. The control unit 36 ​​is configured as a PLC (Programmable Logic Controller), for example. The control unit 36 ​​may also be configured as a computer system including a processor such as a CPU (Central Processing Unit), a memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), an input / output device such as a touch panel, a mouse, a keyboard, a display, and a communication device such as a network card. The control unit 36 ​​operates the various components of the dust collector 1 under the control of a processor based on a computer program stored in the memory.

[0028] Figure 2 It is a perspective view showing a filter. Figure 3 is a cross-sectional view showing a filter. Figure 4 It is a top view showing the filter upper plate. Figure 1 to Figure 3The filter 20 shown is a replaceable cartridge filter. The filter 20 can be replaced, for example, by removing the side wall 10c of the housing 10. The filter 20 includes a cylindrical body 21, a filter upper plate (an example of an end member) 22 provided at an upper end (an example of an end) 21a of the body 21, and a filter lower plate 23 provided at a lower end 21b of the body 21. The upper end 21a and the lower end 21b are ends of the body 21 in the Z direction, respectively.

[0029] The main body 21 is formed by pleating a material such as paper or cloth. In the present embodiment, the main body 21 is formed of a nonwoven fabric. The main body 21 is, for example, cylindrical. The main body 21 is arranged in the dust chamber S1 in a state where the longitudinal direction is 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 is connected to the clean air chamber S2.

[0030] The filter upper plate 22 is an annular plate member having an opening 22a formed in the central portion. The filter upper plate 22 is, for example, in the shape of a circular ring. The filter upper plate 22 is formed of metal, resin, or the like. The filter upper plate 22 has a covering portion 24 covering the upper end portion 21a of the main body 21 and a flange-shaped extension portion 25. When viewed from the direction along the central axis of the main body 21 (Z direction), the extension portion 25 extends to the outside of the upper end portion 21a of the filter 20. The extension portion 25 has a groove shape and surrounds the upper end portion 21a along the side of the main body 21. According to such a groove shape, the strength of the extension portion 25 is increased, so that the filter 20 can be reliably supported by the extension portion 25.

[0031] The extension portion 25 includes an inner wall 25a covering the side surface of the upper end portion 21a, an outer wall 25b opposite to the inner wall 25a, and a bottom wall 25c connecting the lower end of the inner wall 25a and the lower end of the outer wall 25b. A plurality of slits 26 (an example of a hole) are formed in the bottom wall 25c. The slits 26 are long holes extending along the side surface of the main body 21. The plurality of slits 26 have the same shape as each other.

[0032] The shapes of the plurality of slits 26 are rotationally symmetric with respect to the central axis of the main body 21. In the present embodiment, the number of the slits 26 is 2. The two slits 26 are arranged, for example, at an angle 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 so 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 plurality of slits 26 are arranged so as not to be point-symmetrical with respect to the central axis, so that the position around the central axis of the filter 20 can be determined by the position of the slits 26.

[0033] The filter lower disk 23 is a plate member that seals the entire lower end portion 21b. The filter lower disk 23 has, for example, a circular shape. The filter lower disk 23 is formed of metal, resin, or the like.

[0034] Figure 5 yes Figure 1 A partial enlarged view of the Figure 5 In the figure, the guide rail member 14 near the front side is omitted. Figure 1 and Figure 5 As shown, the dust collector 1 includes a seal 13 , a rail member 14 , and a filter frame 40 (an example of a holding member). In this embodiment, the dust collector 1 includes the same number of seals 13 , three pairs of rail members 14 , and three filter frames 40 as the number of filters 20 .

[0035] The seal 13 is mounted on the filter upper plate 22 to hermetically seal the filter upper plate 22 and the first partition plate 15. The seal 13 is an annular plate member having an opening formed in the center. The seal 13 is, for example, in the shape of a circular ring. The seal 13 is formed of a rubber, resin material, etc. The seal 13 is mounted on the covering portion 24, for example, by bonding.

[0036] The guide rail member 14 supports the filter frame 40 and slides the filter frame 40 along the first partition plate 15. In the present embodiment, a pair of guide rail members 14 is provided for each filter frame 40. That is, the dust collector 1 has three pairs of guide rail members 14. A pair of guide rail members 14 extends along the Y direction and is mounted on the first partition plate 15 in a manner of clamping the corresponding filter frame 40 in the X direction. The guide rail member 14 includes a parallel sliding surface 14a and an inclined sliding surface 14b.

[0037] 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 is inclined 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 guide rail member 14 in the Y direction. The inclined sliding surface 14b is opposite to the side wall 10d located on the opposite side of the side wall 10c that is removed when the filter 20 is replaced.

[0038] Figure 6 is a three-dimensional diagram showing the filter frame. Figure 1 , Figure 5 and Figure 6As shown, the filter frame 40 is opposite to the first partition plate 15 in the Z direction and is arranged in the dust chamber S1 to hold the filter 20. The filter frame 40 has: a first surface 40a opposite to the first partition plate 15 in the Z direction; and a second surface 40b facing the opposite side of the first surface 40a. An opening 41 is formed in the filter frame 40 so that the main body 21 can pass through in the Z direction. The opening 41 is formed to a size that the main body 21 and the filter lower plate 23 can pass through and the filter upper plate 22 cannot pass through. The opening 41 is circular and has an inner diameter suitable for the outer diameter of the main body 21. In the present embodiment, the dust collector 1 has three filter frames 40 in the shape of rectangular plates. Three openings 41 are formed in each filter frame 40 arranged at constant intervals in the long side direction of the filter frame 40.

[0039] The filter frame 40 has a plurality of claws 42 provided on the first surface 40a at the peripheral portion 41a of the opening 41. 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 the present embodiment, the number of claws 42 is two, which is the same as the number of slits 26. The two claws 42 are arranged at an angle interval of less than 180 degrees, for example, like the two slits 26. When the filter frame 40 holds the filter 20, the plurality of claws 42 are inserted into the plurality of slits 26, and the peripheral portion 41a of the opening 41 abuts against the extension portion 25 of the filter 20. The plurality of claws 42 are inserted into the plurality of slits 26, so that the filter 20 is positioned relative to the filter frame 40.

[0040] Figure 7 This is an explanatory diagram regarding the method of inserting the claw into the slit. Figure 7 As shown, the claw 42 is a so-called barbed claw, and includes a plurality of protrusions 43, 44 hooked on the extension portion 25 when inserted into the slit 26. The plurality of protrusions 43, 44 protrude in opposite directions along the peripheral portion 41a. The height positions of the plurality of protrusions 43, 44 from the peripheral portion 41a (first surface 40a) are different from each other. In this way, the claw 42 includes the plurality of protrusions 43, 44 hooked on the extension portion 25, so that the filter 20 is less likely to fall off from the filter frame 40.

[0041] The protrusion 43 has an opposing portion 43a that is opposed to the first surface 40a. When the claw 42 is completely inserted into the slit 26, the extension portion 25 is arranged in the space between the first surface 40a and the opposing portion 43a. Therefore, the protrusion 43 is hooked on the extension portion 25. The protrusion 44 has an opposing portion 44a that is opposed to the first surface 40a. When the claw 42 is inserted into the slit 26 halfway, the extension portion 25 is arranged in the space between the first surface 40a and the opposing portion 44a. Therefore, the protrusion 44 is hooked on the extension portion 25.

[0042] The protrusion 44 is provided at the top of the claw 42. The claw 42 also 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 such as the extension portion 25 between the protrusion 45 and the first surface 40a. Therefore, the protrusion 45 is not hooked on the extension portion 25. The protrusion 43 is provided at the middle portion between the top and the 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 becomes narrower 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 to the front end of the protrusion 43. The shapes of the plurality of claws 42 have rotational symmetry with respect to the central axis of the filter 20.

[0043] An example of a method for inserting the claw 42 into the slit 26 is described. First, after the slit 26 is arranged on the claw 42, as shown in FIG. Figure 7 As shown in (a), the slit 26 is moved toward the peripheral portion 41a along the inclined portion 46. As a result, the top of the claw 42 provided with the protrusion 44 passes through the slit 26. Next, the slit 26 is moved toward the peripheral portion 41a. As a result, Figure 7 As shown in (b), the middle portion of the claw 42 provided with the protrusion 43 passes through the slit 26. Figure 7 In the state (b), the protrusion 44 is hooked on the extension portion 25 .

[0044] Finally, if Figure 7 As shown in (c), the slit 26 is moved along the peripheral portion 41a in the protruding direction of the protrusion 45. As a result, the base of the claw 42 provided with the protrusion 45 is arranged in the slit 26, and the extension portion 25 abuts against the peripheral portion 41a. Figure 7 In the state (c), the protrusion 43 is hooked on the extension portion 25. When the claw 42 is pulled out from the slit 26, the slit 26 can be moved in the opposite direction to the direction when the claw 42 is inserted into the slit 26. As described above, the shapes of the plurality of claws 42 have rotational symmetry with respect to the central axis of the filter 20, so that the filter 20 can be rotated together with the filter upper plate 22 to simultaneously insert the plurality of claws 42 into the plurality of slits 26 or pull them out from the plurality of slits 26.

[0045] Figure 8 2 is a cross-sectional view showing a state where a filter with a seal is installed in a filter frame. Figure 6 and Figure 8 As shown, a seal 13 is provided on the filter upper plate 22. The seal 13 can be provided before the filter 20 is installed on the filter frame 40, or after the filter 20 is installed on the filter frame 40.

[0046] The filter frame 40 has a holding portion 51, a limiting portion 52, a pair of reinforcing portions 53 and a plurality of reinforcing portions 54. The holding portion 51 is provided at one end of the long side direction of the second surface 40b and protrudes in a direction opposite to the claw 42. The holding portion 51 is a plate member extending in the short side direction of the second surface 40b. The holding portion 51 is a portion that is held by hand when the filter frame 40 is moved. The holding portion 51 is located near the side wall 40c and is opposite to the side wall 40c. A cutout 51a may be provided in the holding portion 51. In this case, even if there is not enough space below the holding portion 51, it is easy to put a hand under the holding portion 51.

[0047] 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 compression amount of the seal 13. According to the limiting portion 52, the seal 13 can be prevented from being damaged by excessive compression. As a result, the reduction in sealing performance is suppressed. The limiting portion 52 is provided between the holding portion 51 and the opening 41 closest to the holding portion 51.

[0048] A pair of reinforcing portions 53 are provided on the second surface 40b. The pair of reinforcing portions 53 are formed by bending a pair of end portions in the long side direction of the second surface 40b 90 degrees to the side opposite to the claw 42. The reinforcing portion 53 is a plate member extending along the long side direction of the second surface 40b. A plurality of reinforcing portions 54 are provided on the second surface 40b. The plurality of reinforcing portions 54 are ribs extending along the short side direction of the second surface 40b. In the present embodiment, the plurality of reinforcing portions 54 are provided in the same number as the plurality of openings 41. One reinforcing portion 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 portions 54 are provided between adjacent openings 41.

[0049] The filter frame 40 is provided with a hole 55 and a notch-shaped recess 56 used when the filter frame 40 is mounted on the first separator 15. The hole 55 penetrates the filter frame 40 between the gripping portion 51 and the restricting portion 52. The recess 56 is provided at the other end of the filter frame 40 in the longitudinal direction.

[0050] [How to replace the filter]

[0051] An example of a method for replacing the filter 20 is described below. The filter 20 is replaced while the dust collector 1 is stopped. When the filter 20 is installed, first, Figure 7As described above, the filter 20 is installed on the filter frame 40 by passing the claws 42 of the filter frame 40 through the slits 26 of the filter upper plate 22. 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 guide rail members 14. The side wall 10c of the present embodiment constitutes the side wall of the dust chamber S1 and the decompression chamber S21, and thus the dust chamber S1 and the decompression chamber S21 are opened by removing the side wall 10c, but any structure is sufficient as long as at least the dust chamber S1 is opened.

[0052] Next, the filter frame 40 is pushed into the depth of the housing 10 by holding the holding portion 51. After the front end of the filter frame 40 slides on the parallel sliding surface 14a to move parallel to the first partition 15, it slides on the inclined sliding surface 14b to move upward. The filter frame 40 is pushed in until the recess 56 of the filter frame 40 hits the stopper 58 provided on the first partition 15. Next, the holding portion 51 side of the filter frame 40 is lifted toward the first partition 15, and the filter frame 40 is pushed up using 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 15. As a result, the seal 13 is pressed against the first partition 15, and the sealing between the filter upper plate 22 and the first partition 15 can be ensured.

[0053] When removing the filter 20, remove the side wall 10c of the housing 10, loosen the knob nut 57 and remove it. As a result, the gripping portion 51 side of the filter frame 40 is lowered to the parallel sliding surface 14a due to the weight of the filter 20 and the filter frame 40. When the seal 13 adheres to the first partition 15, a downward force is applied to the filter frame 40 to peel the seal 13 from the first partition 15, so that the gripping portion 51 side of the filter frame 40 is lowered to the parallel sliding surface 14a. The claw 42 is hooked on the extension 25, and the filter 20 is not easy to fall off the filter frame 40. Therefore, if a force is applied to the filter 20 through the filter frame 40 in this way, the seal 13 can be easily peeled from the first partition 15.

[0054] Next, the filter frame 40 is pulled forward by holding the holding portion 51, and the filter frame 40 with the filter 20 mounted thereon is pulled out of the housing 10. Finally, as described above, the slit 26 is moved in the opposite direction to the direction in which the claw 42 is inserted into the slit 26, and the claw 42 is pulled out from the slit 26, and the filter 20 is removed from the filter frame 40.

[0055] [Summary of implementation methods]

[0056] As described above, in the dust collector 1, the plurality of claws 42 provided at the peripheral portion 41a of the opening 41 of the filter frame 40 holding the filter 20 include protrusions 43 and 44 hooked on the extension portion while being inserted into the plurality of slits 26 provided at the extension portion 25 of the filter upper plate 22 covering the upper end portion 21a of the filter 20. Thus, the filter 20 is not easy to fall off from the filter frame 40.

[0057] [Modifications]

[0058] Various exemplary embodiments have been described above, but they are not limited to the exemplary embodiments described above, and various omissions, substitutions and changes may also be made. For example, the main body 21 of the filter 20 may also be a multi-sided cylindrical shape such as an elliptical cylindrical shape or a square cylindrical shape with the Z direction as the axial direction. If the upper end 21a is opened, the main body 21 may also be a bottomed cylindrical shape that blocks the lower end 21b. In this case, the filter 20 may not have a filter lower plate 23. As long as the main body 21 extends at least along the Z direction in a manner that hangs down from the first partition 15, it may also be a flat plate with a rectangular main surface, for example. The flat plate-shaped main body 21 may also be formed into a bag-like shape in which one side of the upper end 21a is opened and three sides are closed. In this case, the filter 20 may not have a filter lower plate 23. As long as the claw 42 includes at least the protrusion 43, it may not include the protrusion 44, and it may also include a protrusion hooked on the extension 25 in addition to the protrusions 43 and 44. The clean air chamber S2 may not be divided by the second partition 16.

[0059] [Modes included in the present disclosure]

[0060] The present disclosure includes the methods described in the following items.

[0061] (Item 1)

[0062] A dust collector according to an embodiment of the present disclosure includes: a first air chamber for introducing external air; a filter arranged in the first air chamber to separate dust from the external air and allow air to pass through; a second air chamber for introducing the air that has passed through the filter; a partition to separate the first air chamber from the second air chamber; and a holding member arranged opposite to the partition to hold the filter, wherein the filter includes 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 is provided with an opening through which the main body passes in the first direction, the end member includes an extension portion, the extension portion extends toward the outside of the end portion when viewed from the first direction, and abuts against a peripheral edge portion of the opening of the holding member, a plurality of holes are formed in the extension portion, the holding member includes a plurality of claws, the plurality of claws are provided at the peripheral edge portion, and are inserted into the plurality of holes, and the plurality of claws include protrusions that are hooked on the extension portion when inserted into the plurality of holes.

[0063] According to the dust collector, the plurality of claws provided at the peripheral portion of the holding member for holding the filter include projections hooked on the extension portion while being inserted into the plurality of holes provided in the extension portion of the end member covering the end of the filter. Thus, the filter is not easily removed from the holding member.

[0064] (Item 2)

[0065] The dust collector described in item 1 may also include a seal, which is mounted on the end member to seal between the end member and the partition, and the retaining member has a limiting portion, which is arranged on the surface opposite to the partition and abuts against the partition to limit the compression of the seal. In this case, even if the seal adheres to the partition, since the filter is not easy to fall off from the retaining member, if a force is applied to the filter in a direction away from the partition by the retaining member, the seal can be easily peeled off from the partition. In addition, the seal can be prevented from being damaged by excessive compression. As a result, the reduction in sealing performance can be suppressed.

[0066] (Item 3)

[0067] In the dust collector described in item 1 or 2, the main body may be cylindrical with the first direction as the axial direction, and the shapes of the plurality of claws are rotationally symmetric with respect to the central axis of the filter. In this case, the filter can be rotated together with the end member to simultaneously insert the plurality of claws into the plurality of holes or remove them from the plurality of holes.

[0068] (Item 4)

[0069] In the dust collector described in any one of items 1 to 3, the plurality of claws may include a plurality of protrusions, the plurality of protrusions having different height positions from the peripheral edge portion and protruding in opposite directions. In this case, the filter is further less likely to fall off from the holding member.

[0070] (Item 5)

[0071] The dust collector described in any one of items 1 to 4 may further include: a guide rail member that supports the holding member and allows the holding member to slide along the partition, and the holding member has a gripping portion that is provided on the surface opposite to the partition. In this case, the holding member can be moved by the guide rail member to install and remove the filter. In addition, even in a structure where there is not enough space between the holding member and the partition, the operator can easily grip the gripping portion.

Claims

1. A dust collector, characterized in that: have: The first air chamber is used for introducing external air; a filter, disposed in the first air chamber, to separate dust from the external air and allow the air to pass through; A second air chamber for introducing the air that has passed through the filter; a partition, separating the first air chamber from the second air chamber; as well as a holding member disposed opposite to the partition plate and holding the filter, The filter comprises 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 is provided with an opening which penetrates the main body along the first direction. The end member has an extension portion, the extension portion extends outward from the end portion as viewed from the first direction and abuts against a peripheral edge portion of the opening of the holding member, A plurality of holes are formed in the extension portion, The holding member has a plurality of claws, the plurality of claws being provided on the peripheral portion and being inserted into the plurality of holes. The plurality of claws include protrusions hooked on the extending portion in a state of being inserted into the plurality of holes.

2. The dust collector according to claim 1, characterized in that: Also available: A sealing member is installed on the end member to seal between the end member and the partition. The holding member includes a restriction portion provided on a surface facing the partition plate and contacting the partition plate to restrict a compression amount of the seal.

3. The dust collector according to claim 1 or 2, characterized in that: The main body is in a cylindrical shape with the first direction as the axial direction, The shapes of the plurality of claws have rotational symmetry with respect to a central axis of the filter.

4. The dust collector according to claim 1 or 2, characterized in that: The plurality of claws include a plurality of protrusions, and the plurality of protrusions are located at different heights from the peripheral edge portion and protrude in opposite directions.

5. The dust collector according to claim 1 or 2, characterized in that: Also available: a guide rail member that supports the holding member and enables the holding member to slide along the partition, The holding member has a gripping portion provided on a surface facing the opposite side to the partition plate.

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