JP2008154633A - Filter attaching structure of cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter attaching structure of a cleaning apparatus capable of preventing the leakage of dust from a filter part to the outside. <P>SOLUTION: In the filter attaching structure, tightening is performed by a tightening means in the state of airtightly abutting an entrance side filter holding part 52 communicated to a sewage tank 30 to the outer peripheral edge part of the entrance side end face 71d of a pre-filter 71 and abutting the front side filter holding part 57 of an intermediate filter holding member 55 to the outer peripheral edge part of the exit side end face 71e of the pre-filter 71, and tightening is performed by the tightening means in the state of abutting the rear side filter holding part 60 of the intermediate filter holding member 55 to the outer peripheral edge part of the entrance side end face 72d of a HEPA filter 72 and airtightly abutting an exit side filter holding part 36 communicated with a blower case 32 to the outer peripheral edge part of the exit side end face 72e of the HEPA filter 72. Operation air from the side of the sewage tank 30 is introduced through the pre-filter 71 and the HEPA filter 72 into the blower case 32 without leaking out to the outside and the clean operation air with little dust is discharged to the outside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filter mounting structure for a cleaning device, and in particular, a dust collection chamber communicating with a suction passage having a suction port communicates with a blower case through a filter, and suction is performed by applying a negative pressure to the dust collection chamber with a blower device. The present invention relates to a filter mounting structure for a cleaning device that sucks and stores dust from a mouth into a dust collection chamber via a suction passage.

  Generally, the vacuum cleaner is configured to accumulate dust sucked by a blower fan from a suction port in a dust collection chamber. As this type of vacuum cleaner, there is, for example, Patent Document 1. This vacuum cleaner has a blower case connected to a dust collection chamber with an opening through a throttle cylinder, and a blower fan that is driven to rotate using a blower motor in the blower case. A dust collection case is disposed to swingably support a filter housing case in which a filter for fine dust and a filter for fine dust are overlapped, and a disposable bag-like filter, that is, a dust collection bag is provided in the dust collection chamber.

  With this configuration, the working air containing dust sucked from the suction port is guided to the dust collecting chamber and introduced into the dust collecting bag, and the dust is collected by the dust collecting bag and disposed in the dust collecting case. While passing through the coarse dust filter and fine dust filter in the filter housing case, the coarse air and fine dust that have passed through the dust bag are collected, and the working air is discharged outside the machine.

  Further, Patent Document 2 discloses an elastic body in which a dust collection chamber is negatively pressured by an electric blower, that is, a blower device, and dust from a suction opening opened at one end is detachably mounted in the dust collection chamber via a suction passage. A cleaning robot having a cleaning function of sucking into a dust collecting case provided with a filter, and having a function of autonomous driving by mounting a traveling drive motor using a battery as a drive source, various sensors, a control circuit unit, etc. Is disclosed.

  On the other hand, cleaning of clean rooms with controlled air cleanliness such as pharmaceutical company dispensing areas, hospitals, semiconductor factories, etc., discharges a lot of particulate dust from the cleaning device, which deteriorates the environment and causes cross-contamination between drugs. There is a self-propelled cleaning device that reduces the amount of dust discharged as much as possible because it causes quality troubles. As schematically shown in FIG. 11, this cleaning device is a cleaning liquid spraying means for spraying a cleaning liquid on a floor surface from a cleaning liquid tank provided with a self-propelled cleaning device main body through a nozzle 101, and a rotation for polishing the floor surface. The brush 102 and the squeegee unit 103 are arranged in order from the front to the rear. Further, a sewage tank 105 and a blower case 108 communicated with each other through a suction passage 104 having an inlet 104a opened in front of the squeegee portion 103, and a blower device 109 provided with a blower fan 109a and a blower motor 109b in the blower case 108 is provided. In addition, a prefilter 131 and a HEPA filter 132 capable of collecting particulate dust are interposed between the sewage tank 105 and the blower case 108.

  The attachment structure of the pre-filter 131 and the HEPA filter 132 will be described with reference to FIG. 12 showing an enlarged view of part C in FIG.

  A connecting flange 106a formed on the outer periphery of the end of the tubular air suction passage 106 projecting from the sewage tank 105 and an outer periphery 132a of the HEPA filter 132 formed on the blower case 108 are connected to the outer periphery of the open end. A flange 112a is formed, and a connecting member 112 having a filter holding portion 112b formed on the inner peripheral surface of the HEPA filter 132 and contacting the outer peripheral portion of the outlet side end surface 132c, and an annular shape that fits the outer peripheral surface 131a of the prefilter 131. Connecting flanges 111a and 111b are formed on the outer circumferences of both ends, and a connecting member 111 is formed on the inner peripheral surface with a filter holding portion 111c that contacts the outer peripheral edge portion of the end surface 131b of the pre-filter 131. The connecting flange 106a and the connecting flange 111a of the connecting member 111; An annular rubber packing 115 interposed therebetween, and a rubber packing 116 interposed between the coupling flange 111b and the connecting flange 112a formed on the blower case 108 of the connecting member 111.

  The connecting flanges 106a and 111a, and the connecting flanges 111b and 112b, in which the rubber packings 115 and 116 are interposed, are fastened by bolts 121a and 122a and nuts 121b and 122b, respectively.

  A rubber packing in which the outer peripheral surface 131 a of the pre-filter 131 is fitted to the inner peripheral surface of the inlet side connecting member 111 and the outer peripheral edges of the inlet side end surface 131 b and the outlet side end surface 131 c protrude from the inner peripheral surface of the inlet side connecting member 111. 115 and the filter holding part 131c, and the pre-filter 131 is mounted. Similarly, the outer peripheral surface 132a of the HEPA filter 132 is fitted to the inner peripheral surface of the connecting portion 112, and the outer peripheral edge portions of the inlet side end surface 132b and the outlet side end surface 132c are sandwiched between the rubber packing 116 and the filter holding portion 112b. Is installed.

  The self-propelled cleaning device configured as described above sprays the cleaning liquid in the cleaning liquid tank from the nozzle 101 as the vehicle travels, polishes the floor surface with the rotating brush 102 that rotates in the presence of the cleaning liquid, and blowers A negative pressure is applied to the inside of the sewage tank 105 by the device 109, and the cleaning liquid on the floor is sucked into the sewage tank 105 through the sewage suction passage 104 together with the working air and collected. The working air sucked from the sewage tank 105 by the blower device 109 and discharged to the outside from the discharge port 108a of the blower case 108 collects dust and the like by the prefilter 131 and further collects particulate dust by the HEPA filter 132. Collected and released as clean air with very little dust.

JP-A-10-234630 Japanese Patent No. 3356170

  According to Patent Document 1, dust collected from the suction port is collected in a dust collection bag in the dust collection chamber and further collected while passing through the coarse dust filter and the fine dust filter in the filter housing case. After the coarse dust and fine dust that have passed through the bag are collected, the working air is discharged outside the machine. However, since a minute gap is generated between the throttle tube and the dust collecting case, and between the dust collecting case and the filter housing case, dust that is not collected in the dust collecting bag, for example, fine dust containing particulate dust, is in these gaps. There is a concern that the air will be discharged out of the machine together with the working air.

  According to Patent Document 2, a dust collection case including a filter that is detachably mounted in the dust collection chamber is detachably disposed. However, there is no means for tightly coupling the filter and the dust collection chamber, and the filter There is a possibility that a fine gap is generated between the dust and the dust collecting chamber. In particular, when the filter is worn or deteriorated by use, a gap generated between the filter and the dust collecting chamber becomes prominent, and there is a concern that dust may be discharged outside the machine through this gap.

  On the other hand, according to the cleaning device shown in FIG. 11 and FIG. 12, the working air sucked by the blower device 109 and sucked into the blower case 108 collects dust and the like by the prefilter 131, and further the particulates by the HEPA filter 132. Clean air is collected from the exhaust port 108a, and the amount of mixed dust is collected.

  However, the bolts 121a and 122a and nuts 121b are deteriorated during long-term use, such as deterioration of the rubber packings 115 and 116 interposed between the coupling flanges 106a and 111a, 111b and 112a, assembly, inspection, and maintenance. If the coupling flanges 106a, 111a, 111b, 112a, etc. are deformed due to excessive tightening force due to, for example, 122b, a gap is formed between the rubber packings 115, 116 that are pressed against each other and the coupling flanges 106a, 111a, 111b, 112a. There is a concern that fine dust particles are leaked to the outside together with the working air.

  Therefore, the objective of this invention made | formed in view of this point is providing the filter attachment structure of the cleaning apparatus which can prevent the leakage of the dust from a filter part to the exterior.

  The invention of the filter mounting structure for a cleaning device according to claim 1 that achieves the above object is characterized in that a suction passage having a suction port communicates with a dust collection chamber, and the dust collection chamber has a blower device with a filter interposed therebetween. The blower device communicates with the blower case, and the blower device applies a negative pressure to the dust collection chamber so that dust is sucked and stored in the dust collection chamber through the suction passage and the working air that has passed through the filter is drawn into the dust collection chamber. In the filter mounting structure of the cleaning device that discharges from the discharge port that opens to the blower case, the filter is hermetically covered with the outer peripheral surface and the outer peripheral surface of the filter body having the opposite inlet side end surface and the outlet side end surface, An inlet-side filter holding portion that communicates with the dust collecting chamber and that has the entire outer peripheral edge portion of the inlet-side end surface of the filter main body in airtight contact with the blower case and the filter body An outlet-side filter holding portion in which the entire outer peripheral end portion of the outlet-side end surface abuts in an airtight manner, and the inlet-side filter holding portion is in an airtight contact with the entire outer peripheral edge portion of the inlet-side end surface and Fastening means for fastening the inlet side filter holding part and the outlet side filter holding part in a state in which the outlet side filter holding part is in airtight contact with the entire outer peripheral edge portion of the outlet side end face. Features.

  According to the present invention, the entire outer peripheral edge of the inlet side end face of the filter whose outer peripheral surface is hermetically coated is hermetically pressed against the inlet filter holding portion communicating with the dust collecting chamber, and the outer side of the filter outlet side end face is The entire circumference of the peripheral portion is in airtight contact with the outlet-side filter holding portion communicating with the blower case, and the inlet-side filter holding portion and the outlet-side filter holding portion are connected to the filter at the outer peripheral edge portions of the inlet-side end surface and the outlet-side end surface of the filter. By fastening with fastening means in a state where it is in contact with the entire circumference, work air from the dust collection chamber side is introduced into the blower case via a filter without leaking to the outside, and there is very little dust that is mixed Can be exhausted to the outside.

  In addition, when attaching the filter, there is no problem such as dust leaking out from the gap caused by deformation of the rubber packing or connecting flange, and stable collection of dust etc. by the filter can be secured over a long period of time, and high quality cleaning is possible. It becomes possible.

  Furthermore, since the filter is sandwiched between the inlet-side filter holding portion and the intermediate filter holding member that are separated from each other, a significant weight reduction can be expected as compared with the conventional filter mounting structure that covers and holds the entire outer periphery of the filter.

  According to a second aspect of the present invention, in the filter mounting structure of the cleaning device according to the first aspect, the inlet-side filter holding portion includes an outer peripheral holding portion into which an inlet-side edge portion of the outer peripheral surface of the filter is fitted, and the filter A filter end surface holding portion and a connecting flange portion that are in contact with the entire outer peripheral edge portion of the inlet side end surface, and the outlet side filter holding portion is an outer peripheral holding portion with which the outlet side edge portion of the outer peripheral surface of the filter is fitted. A filter end surface holding portion and a connecting flange portion that are in contact with the entire circumference of the outer peripheral edge portion of the outlet side end surface of the filter, and the fastening means includes: a connecting flange portion of the inlet side filter holding portion; and an outlet side filter holding portion. The connecting flange portion is fastened.

  The present invention is a specific configuration of the inlet-side filter holding portion and the outlet-side filter holding portion according to claim 1, wherein the inlet-side filter holding portion and the outlet-side filter holding portion each include an outer peripheral holding portion and a filter end face holding portion. Therefore, the filter can be held in a stable state. Further, by fastening the connecting flange portion of the inlet side filter holding portion and the connecting flange portion of the outlet side filter holding portion with fastening means, the filter end face holding portion of the inlet side filter holding portion can be completely removed from the outer peripheral edge portion of the inlet side end surface of the filter. The filter end surface holding portion of the outlet side filter holding portion can be maintained in a state of being in airtight contact with the circumference and in a state of being airtightly in contact with the entire outer peripheral edge portion of the outlet side end surface of the filter.

  The invention of the filter mounting structure of the cleaning device according to claim 3 which achieves the above object is characterized in that a suction passage having a suction port communicates with a dust collection chamber, and the dust collection chamber has a blower device with a filter interposed therebetween. The blower device communicates with the blower case, and the blower device applies negative pressure to the dust collection chamber to suck and store dust from the suction port through the suction passage into the dust collection chamber. In a filter mounting structure of a cleaning device that discharges from a discharge port that opens to a case, a first filter in which the outer peripheral surface and the outer peripheral surface of a filter main body having an opposite inlet side end surface and an outlet side end surface are hermetically covered, A second filter whose outer peripheral surface of the filter body having an outer peripheral surface and opposing inlet-side end surfaces and outlet-side end surfaces is hermetically covered, and communicates with the dust collecting chamber, and is formed on the inlet-side end surface of the first filter. Perimeter An inlet-side filter holding portion that hermetically abuts the entire periphery of the edge portion, and an outer peripheral edge portion of the outlet-side end surface of the first filter that is interposed between the first filter and the second filter and communicates with each other. An intermediate filter holding member provided with a front filter holding portion that comes into airtight contact with the periphery, and a rear filter holding portion that comes into airtight contact with the entire outer peripheral edge portion of the inlet side edge surface of the second filter; An outlet-side filter holding portion that communicates with the blower case and hermetically contacts the entire outer peripheral end portion of the outlet-side end surface of the second filter, and the inlet-side filter holding portion is an outer periphery of the inlet-side end surface of the first filter. The inlet side is in a state in which the front filter holding portion of the intermediate filter holding member is in airtight contact with the entire circumference of the outer peripheral edge portion of the outlet side end surface of the first filter. Filter holder And a first fastening means for fastening the front filter holding portion, and the rear filter holding portion of the intermediate filter holding member are in airtight contact with the entire outer peripheral edge portion of the inlet side end surface of the second filter, and Second fastening for fastening the rear filter holding part and the outlet filter holding part in a state in which the outlet filter holding part is in airtight contact with the entire outer peripheral edge portion of the outlet side end face of the second filter. Means.

  According to the present invention, the inlet filter holding portion communicating with the dust collecting chamber is in airtight contact with the outer peripheral edge portion of the inlet side end surface of the first filter whose outer peripheral surface is hermetically covered, and the outlet side end surface of the first filter. Fastened by the first fastening means in a state in which the front filter holding portion of the intermediate filter holding member is in contact with the outer peripheral edge portion of the second filter, and the outer peripheral surface of the second filter whose outer peripheral surface is hermetically covered With the second fastening means, the rear filter holding portion in contact with the rear filter holding portion in contact with the blower case is in airtight contact with the outer peripheral edge portion of the outlet side end surface of the second filter. By tightening, the working air from the dust collection chamber side is introduced into the blower case via the first filter and the second filter without leaking to the outside, and a clean operation with very little dust is present. It is possible to discharge the air to the outside.

  According to a fourth aspect of the present invention, in the filter mounting structure of the cleaning device of the third aspect, the inlet-side filter holding portion is an outer peripheral holding portion into which an inlet-side edge portion of the outer peripheral surface of the first filter is fitted, A filter end surface holding portion and a connecting flange portion that are in contact with the entire circumference of the outer peripheral edge portion of the inlet side end surface of the first filter, wherein the front filter holding portion of the intermediate filter holding member is an outlet of the outer peripheral surface of the first filter; The rear filter of the intermediate filter holding member includes an outer peripheral holding portion to which a side edge portion is fitted, a filter end surface holding portion that contacts the entire outer peripheral portion of the outlet side end surface of the first filter, and a connecting flange portion. The holding portion includes an outer peripheral holding portion into which an inlet side edge portion of the outer peripheral surface of the second filter is fitted, a filter end surface holding portion that contacts the entire outer peripheral edge portion of the inlet side end surface of the second filter, and a connecting flange. The outlet side filter holding portion includes an outer peripheral holding portion to which an outlet side edge portion of the outer peripheral surface of the second filter is fitted, and a filter end surface holding portion that is in contact with the entire outer peripheral edge portion of the outlet side end surface of the filter. The first fastening means fastens the connecting flange part of the inlet filter holding part and the connecting flange part of the front filter holding part, and the second fastening means holds the rear filter holding part. The connection flange part of the part and the flange part of the outlet side filter holding part are fastened.

  The present invention is a specific configuration of the inlet-side filter holding portion, the front-side filter holding portion and the rear-side filter holding portion of the intermediate filter holding member, and the outlet-side filter holding portion. Each of the front filter holding portions of the filter holding member includes an outer peripheral holding portion and a filter end face holding portion, and the connection flange portion of the inlet side filter holding portion and the connection flange portion of the front side filter holding portion are fastened by the first fastening means. The filter end surface holding portion of the filter holding portion is hermetically in contact with the entire outer peripheral edge portion of the inlet side end surface of the first filter, and the filter end surface holding portion of the front and rear filter holding portion is the outlet side end surface of the first filter. It can maintain in the state which contact | abutted airtight to the outer periphery edge part whole periphery. Further, the rear filter holding part and the outlet side filter holding part of the intermediate filter holding member respectively include an outer peripheral holding part and a filter end face holding part, and a connecting flange part of the rear filter holding part and a connecting flange part of the outlet side filter holding part are provided. The filter end face holding part of the rear filter holding part is in airtight contact with the entire outer peripheral edge part of the inlet side end face of the second filter by fastening by the second fastening means, and the outlet side filter holding part The filter end surface holding portion can be maintained in an airtight contact with the entire outer peripheral edge portion of the outlet side end surface of the second filter.

  The invention of the filter mounting structure of the cleaning device according to claim 5 which achieves the above object is characterized in that a suction passage having a suction port communicates with a dust collection chamber, and the dust collection chamber has a blower device with a filter interposed therebetween. The blower device communicates with the blower case, and negative pressure is applied to the dust collection chamber by the blower device, so that dust is sucked and stored in the dust collection chamber through the suction passage, and working air that has passed through a plurality of filters is collected. In the filter mounting structure of a cleaning device that discharges from a discharge port that opens in the blower case, the inlet side filter that communicates with the dust collecting chamber and that the entire outer peripheral edge of the inlet side end surface of the first filter abuts hermetically. Between the holding part, the outlet side filter holding part that communicates with the blower case and the outer peripheral end portion of the outlet side end face of the second filter abuts hermetically, and the first filter and the second filter. A front filter holding portion in which the entire outer peripheral edge portion of the outlet side end surface of the adjacent filter is in airtight contact and a rear filter in airtight contact along the outer peripheral edge portion of the inlet side end surface of the filter One or a plurality of filters arranged via an intermediate filter holding member provided with a holding portion, and each of the filters has an outer peripheral surface and an inlet side end face and an outlet side end face facing each other. The outer peripheral surface is hermetically covered.

  According to this invention, the inlet filter holding portion communicating with the dust collecting chamber is hermetically abutted along the outer peripheral edge portion of the inlet side end surface of the first filter, and the outer peripheral edge portion of the second filter on the outlet side end surface thereof Along the outlet side filter holding part communicating with the blower case along the airtight side, and the outlet side end face of the adjacent filter between the outlet side end face of the first filter and the inlet side end face of the second filter. By providing one or a plurality of filters via an intermediate filter holding member provided with a front filter holding portion that comes into contact and a rear filter holding portion that comes into contact with the inlet side end face of the filter, The working air is introduced into the blower case through three or more filters without leaking to the outside, and clean working air with very little dust can be discharged to the outside.

  According to the present invention, the suction passage provided with the suction port communicates with the dust collection chamber, the dust collection chamber communicates with the blower case provided with the blower device via the filter, and the blower device applies a negative pressure to the dust collection chamber. In the cleaning device that sucks and stores dust from the suction port into the dust collection chamber through the suction passage and discharges the work air that has passed through the filter from the discharge port that opens in the blower case, the work air from the dust collection chamber side is It can be introduced into the blower case via the filter without leaking outside, and dust or the like is collected by the filter, so that clean working air with very little dust can be discharged to the outside.

  Hereinafter, an embodiment of the filter mounting structure of the cleaning device of the present invention will be described by taking a self-propelled cleaning device as an example.

(First embodiment)
A first embodiment will be described with reference to FIGS. 1 is a front view of the self-propelled cleaning device 1, FIG. 2 is a side view of the self-propelled cleaning device 1, FIG. 3 is a bottom view of the self-propelled cleaning device 1, and FIG. It is a perspective view which shows roughly arrangement | positioning of an internal structure.

  The self-propelled cleaning device 1 controls a traveling device 10 that travels on the floor surface to be cleaned while detecting and avoiding obstacles in the cleaning range, a cleaning device 20 that cleans the floor surface, and the like. A control device 80 is provided.

  The traveling device 10 is provided at the lower part of the self-propelled cleaning device 1, and is provided respectively on the front and rear driving wheels 11 provided on the left and right of the center position in the front-rear direction as shown in FIGS. A front caster 12 and a rear caster 13 are provided that can swing according to the traveling of the self-propelled cleaning device 1. As shown in FIG. 3, the left and right drive wheels 11 are connected to a drive motor 14 via a speed reducer. The traveling steering of the self-propelled cleaning device 1 is performed by the difference in the rotational speeds of the left and right drive wheels 11, and the direction change is performed by rotating the left and right drive wheels 11 in the opposite directions. In addition, an obstacle sensor 15 that detects an obstacle in the forward direction and the left-right direction is provided at a front position from the front caster 12, and an obstacle sensor 16 that detects an obstacle on the side of the vehicle body at a rear position of the rear caster 13. Is provided.

  Next, the cleaning device 20 will be described with reference to FIGS. 1 to 4 and FIG.

  The cleaning device 20 is rotated by a brush motor 24 behind the cleaning liquid spraying means 21 for spraying the cleaning liquid stored in the cleaning liquid tank 22 to the floor surface from the nozzle 23 arranged at the lower part of the self-propelled cleaning apparatus 1. Three rotating brushes 25 that are driven to polish the floor surface and a squeegee portion 26 that sucks cleaning liquid including dust on the floor surface together with working air are arranged in order from the front to the rear. As shown in FIGS. 3 and 4, the squeegee portion 26 is provided with a rubber wiper portion 28 in contact with the floor surface at the lower end of the squeegee main body 27 curved in a substantially semicircular arc shape at the rear lower position of the self-propelled cleaning device 1. In addition, a suction passage 29 in which a suction port 29a is opened is provided in front of the central portion of the wiper portion 28.

  The suction passage 29 is connected to a sewage tank 30 serving as a dust collection chamber, and a blower case 32 is continuously formed in the sewage tank 30 via an air suction passage 31, and a blower fan formed in the blower case 32 with a relatively large diameter. And a blower device 40 in which a blower motor 40B, which is formed in a relatively small diameter and rotationally drives a blower fan, is unitized. Between the air suction passage 31 connected to the sewage tank 30 and the blower case 32, a pre-filter 71 that extends in the axial direction as a first filter and a rectangular cross-section that can collect particulate dust is a shaft. A HEPA filter 72 as a second filter extending in the direction is interposed.

  The prefilter 71 includes a block-shaped filter body 71A having a rectangular annular outer peripheral surface 71a, an inlet-side end surface 71d and an outlet-side end surface 71e as shown in FIG. The outer peripheral edge portion of the surface 71a, the inlet side end surface 71d and the outer peripheral edge portion of the outlet side end surface 71e are hermetically covered with a covering material 71B made of, for example, an aluminum alloy and a resin coating. Similarly, the HEPA filter 72 has a block-shaped filter body 72A having a rectangular annular outer peripheral surface 72a, an inlet-side end surface 72d, and an outlet-side end surface 72e. The outer peripheral surface 72a, the outer peripheral portion of the inlet-side end surface 72d, and The outer peripheral edge portion of the outlet side end face 72e is airtightly covered with a covering material 72B made of, for example, an aluminum alloy and a resin coating.

  The blower case 32 is formed in a hollow shape by the blower cover 33 and the motor cover 45. The blower cover 33 has a rectangular hollow cross-sectional shape and extends in the axial direction in a box shape. The cover body 34 is formed with a discharge port 34a, and an inlet portion 35a is formed in one end surface portion 35 of the cover body 34 in a rectangular tube shape. And a flange portion extending along the other end edge of the cover body 34 and bent outward so as to have a mounting hole 39a. 39.

  The outlet side filter holding part 36 is formed of a flange-like connecting flange part 37 formed outwardly along an edge of a cylindrical inlet part 35 a formed on the end face part 35, and a rectangular cylinder from the connecting flange part 37. A filter edge outer periphery holding portion 38a is formed which has an outer periphery holding portion 38 that protrudes in the shape of an outer periphery and the outlet side edge portion 72c of the outer peripheral surface 72a of the HEPA filter 72 is fitted to the inner peripheral surface of the outer periphery holding portion 38. In addition, a filter end surface abutting portion 37 a is formed that is hermetically abutted along the entire outer peripheral edge portion of the outlet side end surface 72 e of the HEPA filter 72 along the inner periphery of the end surface of the connecting flange portion 37. A mounting hole 37 b extending in the axial direction is formed in the end edge of the coupling flange portion 37. A blower device attachment portion 35 b that holds the blower device 40 is formed on the end surface portion 35.

  The partition wall 41 has an opening 41a having a slightly larger diameter than the blower housing 40A of the blower device 40 and can be overlapped with a connecting flange portion 37 formed on the blower cover 33 on the outer periphery. The partition wall 41 corresponds to the mounting hole 37b. Is drilled. The motor cover 45 is a bottomed cylindrical shape having a cylindrical outer peripheral surface 46 and a bottom portion 47 that cover a space 49 allowing diffusion of cooling air between the motor cover 45 and the blower motor 40B. A partition wall 41 is interposed at the opening end. The connecting flange 48 is opposed to the connecting flange 39 and has a mounting hole 48a.

  Then, the front surface of the blower housing 40A is bolted to the blower device mounting portion 35b of the blower cover 33 to attach the blower device 40 to the blower cover 33, and the outer peripheral edge of the rear surface of the blower housing 40A and the peripheral edge portion of the opening 41a of the partition wall 41. The blower device 40 is attached by bolting with an annular seal member 50 interposed therebetween, and the rear outer peripheral edge of the blower housing 40A and the opening 41a are hermetically sealed.

  Then, the connecting flange 39 of the blower cover 33 and the connecting flange 48 of the motor cover 45 are fastened by bolts 51a and nuts 51b with the partition wall 41 interposed therebetween.

  As a result, the blower case 33 is formed by the blower cover 33 and the motor cover 45, and the blower case 32 is hermetically partitioned by the partition wall 41, the seal member 50, and the rear portion of the blow housing 40A, and the working air continues from the inlet portion 35a to the discharge port 34a. A blower chamber I in which a blower housing 40A for accommodating a blower fan and a blower motor chamber II in which a blower motor 40B is disposed are formed.

  On the other hand, when the blower motor 40B disposed in the blower motor chamber II is driven, an air flow that flows and diffuses along the motor cover 45 is generated, and the heat generated by the blower motor 40B is radiated through the motor cover 45. Cooling is performed by working air passing through the blower chamber I through the partition wall 41 and the blower housing 40A. Further, the blower motor chamber II is airtightly separated from the blower chamber I by the partition wall 41, and the blower motor 40B is housed in the blower motor chamber II maintained in a sealed state. Therefore, carbon dust generated by driving the blower motor 40B and Dust generated due to wear or the like of the rotating part is accumulated in the blower motor chamber II formed by the motor case 45 and is not discharged outside.

  The attachment structure of the pre-filter 71 and the HEPA filter 72 will be described with reference to the perspective views shown in FIGS.

  The inlet side filter holding part 52 formed in the air suction passage 31 connected to the sewage tank 30, the intermediate filter holding member 55 disposed between the prefilter 71 and the HEPA filter 72, and the blower case 32 are formed. The outlet side filter holding part 36 is provided.

  The inlet-side filter holding portion 52 is formed to protrude in a rectangular cylindrical shape from a flange-like connection flange portion 53 that is bent outward along the edge of the expanded air suction passage 31 and the connection flange portion 53. A filter edge outer periphery holding portion 54a is formed on the inner peripheral surface of the outer periphery holding portion 54, and the inlet edge portion 71b of the outer peripheral surface 71a of the prefilter 71 is fitted to the inner peripheral surface of the outer periphery holding portion 54. A filter end surface holding portion 53a is formed that is hermetically in contact with the entire outer periphery of the inlet side end surface 72d of the prefilter 71 along the inner periphery of the end surface of the portion 53. An attachment hole 53b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 53.

  The intermediate filter holding member 55 includes a front filter holding portion 57 and a rear filter holding portion 60 that are connected by a hollow communication portion 56. The front filter holding portion 57 has a flange-like connecting flange portion 58 bent outward along the edge of the communication portion 56 and an outer peripheral holding portion 59 that is formed to protrude from the connecting flange portion 58 into a rectangular cylindrical shape. A filter edge outer periphery holding portion 59a is formed on the inner peripheral surface of the outer peripheral holding portion 59, and the outlet end edge portion 71c of the outer peripheral surface 71a of the prefilter 71 is fitted to the inner peripheral surface of the connecting flange portion 58. A filter end surface holding portion 58a is formed along the periphery of the outer peripheral edge portion of the outlet side end surface 71d of the prefilter 71 in an airtight manner. An attachment hole 58b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 58.

  Similarly, the rear filter holding part 60 is formed in a rectangular tube shape from the flange-like connecting flange part 61 and the connecting flange part 61 that are bent outward along the edge of the communication part 56, and the outer peripheral holding part. 62 is formed on the inner peripheral surface of the outer peripheral holding portion 62, and the filter edge outer peripheral holding portion 62 a into which the inlet side edge portion 72 b of the outer peripheral surface 72 a of the HEPA filter 72 is fitted. A filter end surface holding portion 61a is formed along the inner periphery of the end surface in a hermetic contact with the entire outer peripheral edge portion of the inlet side end surface 72d of the HEPA filter 72. A mounting hole 61 b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 61. Further, the intermediate filter holding member 55 is provided with a mounting bolt for fixing the intermediate filter holding member 55 to the frame or the like of the traveling device, but the illustration and description are omitted for the sake of simplicity.

  The inlet side edge 71b of the outer peripheral surface 71a of the prefilter 71 is fitted into the filter edge outer peripheral holding portion 54a formed on the inner peripheral surface of the outer peripheral holding portion 54 of the inlet side filter holding portion 52 thus configured. While the outer peripheral edge portion of the side end surface 71d is brought into contact with the filter end surface holding portion 53a, the outer periphery of the filter edge formed on the inner peripheral surface of the outer peripheral holding portion 59 of the front filter holding portion 57 formed on the intermediate filter holding member 55 The holding portion 59a is fitted to the outlet side edge portion 61c of the outer peripheral surface 71a of the prefilter 71, and the filter end surface holding portion 58a is brought into contact with the outer peripheral edge portion of the outlet side end surface 71d.

  An attachment hole 53b formed in the connection flange portion 53 of the inlet-side filter holding portion 52 fitted to both ends of the prefilter 71 and an attachment hole 58b formed in the connection flange portion 58 of the intermediate filter holding member 55. The inlet side filter holding member 52 and the intermediate filter holding part 55 are fastened by applying tension by the first fastening means by the mounting bolt 65a to be inserted and the nut 65b screwed to the mounting bolt 65a, and the inlet side filter holding member 52 The prefilter 71 is sandwiched and fixed between the intermediate filter holding portion 55. As a result, the prefilter 71 can be held in a stable state, and the filter end surface holding portion 53a of the inlet side filter holding portion 52 is in airtight contact with the entire outer peripheral edge portion of the inlet side end surface 71d of the prefilter 71. In addition, the filter end surface holding portion 60 of the front filter holding portion 57 can be maintained in an airtight contact with the entire outer peripheral edge portion of the outlet side end surface 71e of the prefilter 71.

  Similarly, the inlet side edge of the outer peripheral surface 72a of the HEPA filter 72 is formed on the inner peripheral surface of the outer peripheral holding portion 62 of the rear filter holding portion 60 formed on the intermediate filter holding member 55 and is formed on the filter edge outer peripheral holding portion 62a. 72b is inserted so that the outer peripheral edge portion of the inlet side end face 72d is brought into contact with the filter end face holding part 61a, while the inner peripheral face of the outer peripheral holding part 38 formed in the outlet side filter holding part 36 formed in the blower case 32. The filter edge outer periphery holding portion 38a formed on the outer peripheral surface 72a of the HEPA filter 72 is fitted to the outlet side edge portion 72c, and the filter end surface holding portion 37a is brought into contact with the outer peripheral edge portion of the outlet side end surface 72d. .

  The mounting hole 61b formed in the connecting flange portion 61 of the rear filter holding portion 60 of the intermediate filter holding member 55 fitted to both ends of the HEPA filter 72 and the outlet side filter holding portion 36 formed in the blower case 32. Tension is applied by the second fastening means by the mounting bolt 66a inserted into the mounting hole 37b drilled in the connecting flange portion 37 and the nut 66b screwed into the mounting bolt 66a, and the rear filter holding portion 60 and the outlet are provided. The side filter holding part 36 is fastened and the HEPA filter 72 is sandwiched and fixed between the rear filter holding part 60 and the outlet side filter holding part 36 of the intermediate filter holding member 55.

  As a result, the HEPA filter 72 can be held in a stable state, and the filter end surface holding portion of the rear filter holding portion 60 is in airtight contact with the entire outer peripheral edge portion of the inlet side end surface 72d of the HEPA filter 72. In addition, the filter end surface holding portion of the outlet filter holding portion 36 can be maintained in an airtight contact with the entire outer peripheral edge portion of the outlet side end surface 72e of the HEPA filter 72.

  The self-propelled cleaning device 1 configured in this manner disperses the cleaning liquid in the cleaning liquid tank 22 from the nozzle 23 as the vehicle travels, and then polishes the floor surface with a rotating brush 25 that rotates in the presence of the cleaning liquid. In addition, the inside of the sewage tank 30 is negatively pressured by the blower device 40 and the working air is sucked from the suction port 29a of the sewage suction passage 29 together with the cleaning liquid containing dust accumulated by the squeegee portion 26, and the cleaning liquid is sucked and stored in the sewage tank 30. And collect. The air sucked from the sewage tank 30 by the blower device 40 and sucked into the blower case 32 and discharged to the outside from the discharge port 34a is collected with dust etc. by the prefilter 71, and further dust particles are collected by the HEPA filter 72. Is collected, and clean air with very little dust is released from the outlet.

  Therefore, according to the filter mounting structure configured as described above, the air suction passage 31 connected to the sewage tank 30 on the inlet side end surface 71d side of the prefilter 71 whose outer peripheral surface 71a is hermetically covered by the covering material 71 is provided. The inlet filter holding part 52 formed in the air discharge port 31a is fitted, the front filter holding part 56 of the intermediate filter holding member 55 is fitted to the outlet side end face 71e side, and tension is applied by the coupling bolt 65a and the nut 65b. Further, the rear filter holding portion 60 of the intermediate filter holding member 55 is fitted to the inlet side end portion 72d of the HEPA filter 72 whose outer peripheral surface 72a is hermetically covered by the covering material 72A, and the outlet side end surface 72e. The outlet side filter holding part 36 formed in the blower case 32 is fitted to the side, and tension is applied by the coupling bolt 66a and the nut 66b. It has been given to the pressure.

  Thereby, the inlet filter holding part 52 formed in the air discharge port 31a of the air suction passage 31 around the entire outer peripheral edge portion of the inlet side end surface 71d of the prefilter 71 whose outer peripheral surface 71a is hermetically covered by the covering material 71. The front filter holding portion of the intermediate filter holding member 55 is hermetically sealed around the entire outer peripheral edge portion of the outlet side end surface 71e of the prefilter 71 whose outer peripheral surface 72a is hermetically covered by the covering material 72. At the same time, the rear filter holding portion 60 is hermetically pressed against the entire outer periphery of the inlet end surface 72 d of the HEPA filter 72, and the entire outer periphery of the outlet end surface 72 e of the HEPA filter 72 is blower case 32. Formed on the outlet side filter holding part 36 and airtightly contacted with the outlet side filter holding part 36 so that the air from the air communication passage 31 side, that is, the working air is not leaked to the outside. Cleaner is introduced into the blower case 32 via the filter 71 and the HEPA filter 72, dust is collected by the pre-filter 71, and particulate dust is collected by the HEPA filter 72. Fresh air is discharged from the outlet 34a.

Further, when attaching the pre-filter 71 and the HEPA filter 72, rubber packings (not shown) are provided on the outer periphery of the inlet-side end face and the outlet-side end face of the pre-filter, and the inlet-side end face and the outlet-side end face are sandwiched between the filter holding members. The fixed structure eliminates problems such as dust leaking from gaps caused by deterioration of the rubber packing and deformation of the connecting flange, ensuring that the prefilter 71 and the HEPA filter 72 can collect dust and the like for a long period of time. Quality cleaning becomes possible.

  Further, the prefilter 71 is sandwiched between the inlet-side filter holding part 52 and the intermediate filter holding member 55 which are separated from each other, and the HEPA filter 72 is sandwiched between the intermediate filter holding member 55 and the outlet-side filter holding part 35 which are separated from each other. 71, since the HEPA filter 72 is held, a significant weight reduction can be expected compared to the filter mounting structure that covers and holds the entire outer periphery of the prefilter 71 and the HEPA filter 72.

  Next, desorption of the prefilter 71 and the HEPA filter 72 such as replacement of the prefilter 71 and the HEPA filter 72 will be described.

  The pre-filter 71 and the HEPA filter 72 are removed after the coupling bolt 65 a and the nut 65 b installed between the inlet-side filter holding portion 52 and the front-side filter holding member 56 of the intermediate filter holding member 55, and the intermediate holding member 55. The coupling bolt 66a and the nut 66b installed between the side filter holding member 60 and the outlet side filter holding part 36 are removed.

  After that, the air suction passage 31 is slightly bent to separate the inlet side filter holding part 52 from the outlet side filter holding part 36, and the outer peripheral holding part 54 of the inlet side filter holding part 52 is moved to the inlet side end face 71d side of the prefilter 71. The prefilter 71, the intermediate filter holding member 55, and the HEPA filter 72 are integrally carried out by extracting from the outer peripheral holding part 36 of the outlet side filter holding part 35 while extracting from the outlet side end face 72e side of the HEPA filter 72. Thus, the pre-filter 71 and the HEPA filter 72 can be easily removed.

  On the other hand, the prefilter 71 and the HEPA filter 72 are attached by slightly bending the air suction passage 31 to separate the inlet side filter holding part 52 from the outlet side filter holding part 36, The prefilter 71, the intermediate filter holding member 55, and the HEPA filter 72 are inserted between the outlet side filter holding portions 35.

  The inlet side end face 71d side of the prefilter 71 is inserted into the outer peripheral holding part 54 of the inlet side filter holding part 52, and the outlet side end face 72e side of the HEPA filter 72 is inserted into the outer peripheral holding part 37 of the outlet side filter holding part 36. A coupling bolt 65a and a nut 65b are installed between the inlet-side filter holding part 52 and the front-side filter holding member 56 of the intermediate filter holding member 55, and the rear-side filter holding member 60 and the outlet-side filter holding part of the intermediate holding member 55 35, the pre-filter 71 and the HEPA filter 72 can be easily attached by installing the coupling bolt 66a and the nut 66b.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. 9 and 10, the same reference numerals are given to the portions corresponding to those in FIGS. 1 to 8, and detailed description of the portions will be omitted.

  FIG. 9 is a cross-sectional view corresponding to FIG. 7 of the first embodiment showing the mounting structure of the pre-filter 71 and the HEPA filter 72, and FIG. 10 is a perspective view of the portion.

  Similar to the first embodiment, it is disposed between the inlet filter holding portion 52 formed at the air outlet 31 a of the air suction passage 31 connected to the sewage tank 30, and the prefilter 71 and the HEPA filter 72. An outlet filter holding part 36 formed in the intermediate filter holding member 55 and the blower case 32 is provided, and an intermediate connecting member 75 is further provided. The inlet side filter holding part 52, the intermediate filter holding member 55, and the outlet side filter holding part 36 have the same configuration as in the first embodiment.

  The intermediate connecting member 75 includes a hollow rectangular cross-section main body 76 that surrounds the outer peripheral surface 72a of the HEPA filter 72, a connecting flange portion 77 that faces the connecting flange portion 61 of the intermediate filter holding portion 55 on both sides of the main body 76, and an outlet side. A connecting flange portion 78 that faces the connecting flange portion 37 of the filter holding portion 36 is provided.

  An attachment hole 77 b corresponding to the attachment hole 61 b of the connection flange portion 61 formed in the intermediate filter holding member 55 is formed in the connection flange portion 77, and the connection flange formed in the outlet side filter holding portion 35 in the connection flange portion 78. A mounting hole 78b corresponding to the mounting hole 36b of the portion 36 is formed.

  Then, the outer peripheral edge portion of the inlet side end face 71d is formed by fitting the inlet side edge 71b of the outer peripheral face 71a of the pre-filter 71 into the outer peripheral holding part 54a formed on the outer peripheral holding part 54 of the inlet side filter holding part 52. While contacting the filter end surface holding portion 53a, the filter edge outer peripheral holding portion 59a formed on the inner peripheral surface of the outer peripheral holding portion 59 of the front filter holding portion 57 of the intermediate filter holding member 55 is used as the outer peripheral surface 71a of the prefilter 71. The outlet end edge portion 61c is fitted, the filter end surface holding portion 58a is brought into contact with the outer peripheral edge portion of the outlet side end surface 71d, and is inserted into the attachment hole 53b of the connection flange portion 53 and the attachment hole 58b of the connection flange portion 58. The inlet-side filter holding member 52 and the intermediate filter are tensioned by applying a tension by a mounting bolt 65a and a fastener by a nut 65b screwed to the mounting bolt 65a. The pre-filter 71 sandwiched and fixed between the holding portion 55.

  Similarly, the inlet side edge 72b of the outer peripheral surface 72a of the HEPA filter 72 is fitted into the filter edge outer peripheral holding portion 67a formed on the inner peripheral surface of the outer peripheral holding portion 67 of the rear filter holding portion 60 of the intermediate filter holding member 55. Then, the outer peripheral edge portion of the inlet side end surface 72d is brought into contact with the filter end surface holding portion 61a, while being formed on the inner peripheral surface of the outer peripheral holding portion 37 formed in the outlet side filter holding portion 36 formed in the blower case 32. The filter edge outer periphery holding portion 37a is fitted into the outlet side edge portion 72c of the outer peripheral surface 72a of the HEPA filter 72, and the filter end surface holding portion 38a is brought into contact with the outer peripheral edge portion of the outlet side end surface 72d.

  The attachment hole 61b formed in the connection flange portion 61 of the rear filter holding portion 60 of the intermediate filter holding member 55 and the attachment flange portion 77 of the intermediate connection member 75 fitted to the HEPA filter 72 are attached to each other. The mounting bolt 67a inserted into the hole 77b and a nut 67b screwed into the mounting bolt 67a apply tension, and the mounting hole 78b drilled in the connecting flange portion 78 and the connecting flange portion of the outlet side filter holding portion 36 Tension is applied by a mounting bolt 68a inserted through the mounting hole 37b drilled in 37 and a nut 66b screwed into the mounting bolt 68a to hold the rear filter holding portion 60 and the outlet filter holding of the intermediate filter holding member 55. The HEPA filter 72 is sandwiched between the unit 35 and fixed.

  Thus, the HEPA filter 72 is interposed between the rear filter holding part 60 and the outlet side filter holding part 36 of the intermediate filter holding member 55 with the intermediate connecting member 75 surrounding the HEPA filter 72 and the mounting bolt 67a nut 67b interposed therebetween. By sandwiching and fixing, the intermediate portion of the inlet side end surface 72d and the outlet side end surface 72e of the HEPA filter 72 is held by the intermediate connecting member 75, and the HEPA filter 72 is held in a more stable state in addition to the first embodiment. can do. In particular, it is effective for mounting and holding the HEPA filter 72 having a long distance between the inlet side end face 72d and the outlet side end face 72e.

  The present invention is not limited to the first embodiment and the second embodiment, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the example in which the two filters of the pre-filter 71 and the HEPA filter 72 are provided has been described, but it is also possible to attach one filter. In this case, the intermediate filter holding member is omitted, and the inlet side edge of the outer peripheral surface of the filter is fitted into the filter edge outer peripheral holding portion 54a formed on the inner peripheral surface of the outer peripheral holding portion 54 of the inlet side filter holding portion 52. The filter edge formed on the inner peripheral surface of the outer peripheral holding portion 38 formed on the outlet side filter holding portion 36 formed on the blower case 32 while the outer peripheral edge portion of the side end surface is brought into contact with the filter end surface holding portion 53a. The outer peripheral holding portion 38a is fitted to the outlet side edge portion of the outer peripheral surface of the filter, and the filter end surface holding portion 37a is brought into contact with the outer peripheral edge portion of the outlet side end surface. Further, a mounting bolt inserted into a mounting hole drilled in the connecting flange of the inlet side filter holding portion and a mounting hole 37b drilled in the connecting flange portion 37 of the outlet side filter holding portion 36, and screwed into this mounting bolt. Tension is applied by the second fastening means with a nut to fasten the inlet side filter holding part and the rear side filter holding part, and the filter is sandwiched and fixed between the inlet side filter holding part and the rear side filter holding part. .

  It is also possible to attach three or more filters. In the case of a watering type cleaning device as in the present embodiment, it is also possible to provide a mist separator upstream of the prefilter and the HEPA filter. In this case, the outer periphery of the outlet side end face of the adjacent filter between the filter having the inlet side end attached to the inlet side filter holding part 52 and the filter having the outlet side end attached to the outlet side filter holding part. An intermediate filter holding member provided with a front filter holding portion that comes in airtight contact along the edge portion and a rear filter holding portion that comes in airtight contact along the outer peripheral edge portion of the outlet side edge surface of the filter. And one or more filters. Moreover, when attaching a filter, in order to hold | maintain between each junction part, it is also possible to provide rubber packing etc. in the outer periphery of the entrance side end surface of a filter, and an exit side end surface.

It is a front view of the self-propelled cleaning device provided with the filter attachment structure concerning a 1st embodiment of the present invention. It is a side view of a self-propelled cleaning device. It is a bottom view of a self-propelled cleaning device. It is a perspective view which shows roughly arrangement | positioning of the internal structure of a self-propelled cleaning apparatus. It is a figure which shows a cleaning apparatus typically. It is the A section enlarged view of FIG. It is the B section enlarged view of FIG. It is a perspective view of a pre filter and a HEPA filter attachment part. It is a figure which shows the filter attachment structure which concerns on 2nd Embodiment of this invention. It is a perspective view of a pre filter and a HEPA filter attachment part. It is a figure which shows the conventional cleaning apparatus typically. It is the B section enlarged view of FIG.

Explanation of symbols

20 Cleaning device 29 Suction passage 30 Sewage tank (dust collection chamber)
31 Air suction passage 32 Blower case 34a Discharge port 36a Inlet portion 36 Outlet side filter holding portion 39 Flange 39a Mounting hole 37 Connecting flange portion 37a Filter end surface abutting portion 37b Mounting hole
38 outer periphery holding portion 38a filter edge outer periphery holding portion 40 blower device 52 inlet side filter holding portion 53 connecting flange portion 53a filter end surface holding portion 53b mounting hole 54 outer periphery holding portion 54a filter edge outer periphery holding portion 55 intermediate filter holding member 56 communication Part 57 front filter holding part 58 connecting flange 58a filter end face holding part 58b mounting hole 59 outer peripheral holding part 59a filter edge outer peripheral holding part 60 rear filter holding part 61 connecting flange part 61a filter end face holding part 61b mounting hole 62 outer peripheral holding part 62a Filter edge outer periphery holding part 65a Mounting bolt (first fastening means)
65b Nut 66a Mounting bolt (second fastening means)
66b Nut 71 Pre-filter (first filter)
71A Filter body 71B Coating material 71a Outer peripheral surface 71d Inlet side end surface 71e Outlet side end surface 72 HEPA filter (second filter)
72A Filter body 72B Coating material 72a Outer peripheral surface 72d Inlet end surface 72e Outlet end surface

Claims (5)

A suction passage having a suction port communicates with the dust collection chamber, and the dust collection chamber communicates with a blower case provided with a blower device through a filter, and the blower device applies a negative pressure to the dust collection chamber. In the filter mounting structure of the cleaning device that sucks and accommodates dust from the suction port into the dust collecting chamber through the suction passage and discharges the working air that has passed through the filter from the discharge port that opens in the blower case.
The filter is hermetically coated on the outer peripheral surface and the outer peripheral surface of the filter main body having the opposite inlet side end surface and the outlet side end surface,
An inlet-side filter holding portion that communicates with the dust collecting chamber and that the entire outer peripheral edge portion of the inlet-side end surface of the filter body abuts hermetically;
An outlet-side filter holding portion that communicates with the blower case and that the outer peripheral end portion of the outlet-side end surface of the filter body abuts hermetically.
The inlet-side filter holding portion is in airtight contact with the entire outer peripheral edge portion of the inlet-side end surface, and the outlet-side filter holding portion is in airtight contact with the entire outer peripheral edge portion of the outlet-side end surface. And a fastening means for fastening the inlet-side filter holding portion and the outlet-side filter holding portion in a state. The inlet-side filter holding portion includes an outer peripheral holding portion to which an inlet-side end edge portion of the outer peripheral surface of the filter is fitted, a filter end surface holding portion and a connecting flange portion that are in contact with the entire outer peripheral edge portion of the inlet-side end surface of the filter. With
The outlet-side filter holding portion includes an outer peripheral holding portion that fits an outlet-side edge portion of the outer peripheral surface of the filter, a filter end-surface holding portion that contacts the entire outer peripheral portion of the outlet-side end surface of the filter, and a connecting flange portion With
2. The filter mounting structure for a cleaning device according to claim 1, wherein the fastening means fastens the rolling flange portion of the inlet side filter holding portion and the connecting flange portion of the outlet side filter holding portion. A suction passage having a suction port communicates with the dust collection chamber, and the dust collection chamber communicates with a blower case provided with a blower device through a filter, and the blower device applies a negative pressure to the dust collection chamber. In the filter mounting structure of the cleaning device that sucks and accommodates dust from the suction port into the dust collecting chamber through the suction passage and discharges the working air that has passed through the filter from the discharge port that opens in the blower case.
A first filter in which the outer peripheral surface of the filter body having an outer peripheral surface and opposing inlet-side end surfaces and outlet-side end surfaces is hermetically covered;
A second filter in which the outer peripheral surface of the filter main body having an outer peripheral surface and opposing inlet-side end surfaces and outlet-side end surfaces is hermetically covered;
An inlet-side filter holding portion that communicates with the dust collection chamber and that hermetically contacts the entire outer peripheral edge portion of the inlet-side end surface of the first filter;
A front filter holding portion that is interposed between the first filter and the second filter and that hermetically contacts the entire outer peripheral edge portion of the outlet side end surface of the first filter that communicates with each other, and the second filter An intermediate filter holding member having a rear filter holding portion that hermetically abuts the entire outer peripheral edge portion of the inlet side edge surface;
An outlet-side filter holding portion communicating with the blower case and hermetically contacting the entire outer peripheral end portion of the outlet-side end surface of the second filter;
The inlet-side filter holding portion is in airtight contact with the entire outer peripheral edge portion of the inlet-side end surface of the first filter, and the front-side filter holding portion of the intermediate filter holding member is an outer periphery of the outlet-side end surface of the first filter. First fastening means for fastening the inlet-side filter holding portion and the front-side filter holding portion in a state of being in airtight contact with the entire periphery of the edge portion;
The rear filter holding portion of the intermediate filter holding member is in airtight contact with the entire outer peripheral edge portion of the inlet side end surface of the second filter, and the outlet side filter holding portion is an outlet side end surface of the second filter. And a second fastening means for fastening the rear filter holding portion and the outlet filter holding portion in a state of being in airtight contact with the entire outer peripheral edge portion of the filter. Mounting structure. The inlet-side filter holding portion includes an outer peripheral holding portion in which an inlet-side end edge portion of the outer peripheral surface of the first filter is fitted, and a filter end surface holding portion that is in contact with the entire outer peripheral edge portion of the inlet-side end surface of the first filter. And the front filter holding portion of the intermediate filter holding member includes an outer peripheral holding portion into which an outlet side edge portion of the outer peripheral surface of the first filter is fitted, and an outlet side end surface of the first filter. A filter end surface holding portion and a connecting flange portion that are in contact with the entire circumference of the outer peripheral edge portion are provided, and the inlet side edge portion of the outer peripheral surface of the second filter is fitted to the rear filter holding portion of the intermediate filter holding member. An outer periphery holding portion, a filter end surface holding portion that contacts the entire outer periphery of the inlet side end surface of the second filter, and a connecting flange portion;
The outlet-side filter holding portion includes an outer peripheral holding portion in which an outlet-side edge portion of the outer peripheral surface of the second filter is fitted, a filter end surface holding portion that contacts the entire outer peripheral edge portion of the outlet-side end surface of the filter, and a connection With a flange,
The first fastening means fastens the connection flange part of the inlet filter holding part and the connection flange part of the front filter holding part, and the second fastening means includes the connection flange part and the outlet side of the rear filter holding part. The filter mounting structure for a cleaning device according to claim 3, wherein a flange portion of the filter holding portion is fastened. A suction passage having a suction port communicates with the dust collection chamber, and the dust collection chamber communicates with a blower case provided with a blower device through a filter, and the blower device applies a negative pressure to the dust collection chamber. In the filter mounting structure of the cleaning device that sucks and accommodates dust from the suction port into the dust collecting chamber through the suction passage and discharges the working air that has passed through the plurality of filters from the discharge port that opens in the blower case.
An inlet-side filter holding portion that communicates with the dust collecting chamber and that the entire outer peripheral edge portion of the inlet-side end surface of the first filter abuts hermetically;
An outlet-side filter holding portion that communicates with the blower case and that the entire outer periphery of the outlet-side end surface of the second filter abuts hermetically;
A front filter holding portion that is interposed between the first filter and the second filter and in which the entire outer peripheral edge portion of the outlet side end surface of the adjacent filter abuts hermetically and the outer peripheral end of the inlet side end surface of the filter One or a plurality of filters arranged via an intermediate filter holding member provided with a rear filter holding portion that comes into airtight contact along the edge portion,
A filter mounting structure for a cleaning device, wherein each of the filters has an outer peripheral surface and an outer peripheral surface of a filter main body having an inlet-side end surface and an outlet-side end surface facing each other.

Images