JP2015021530A - Connection structure of revolving shaft, filter cleaning device and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of a revolving shaft capable of certainly connecting a connection shaft to a drive shaft by arranging a spring at a predetermined position with regard to the drive shaft while structurally preventing the plastic deformation of the spring due to an external force during the connection of the connection shaft to the drive shaft.SOLUTION: A connection structure of a revolving shaft comprises: a drive shaft 70 for transmitting a torque that includes a cylindrical part 73, into which a connection shaft 90 is inserted; the connection shaft 90 connected to the drive shaft 70; and a spring part provided in the drive shaft 70 and including an U-shaped bent part 83 opposing an insertion direction of the connection shaft 90 into the drive shaft 70, in which the connection shaft 90 includes a concave groove part 94 into which the bent part 83 of the spring part is fitted when the connection shaft 90 is inserted into the drive shaft 70.

Description

  The present invention relates to a rotating shaft coupling structure, a filter cleaning device, and an air conditioner having a driving shaft for transmitting rotational force and a coupling shaft coupled to the driving shaft.

  Conventionally, in a connecting structure of a driving shaft for transmitting rotational force and a rotating shaft configured to detachably connect a connecting shaft connected to the driving shaft, the mounting angle of the connecting shaft is set when the connecting shaft is mounted on the driving shaft. A connecting structure of rotating shafts that can be connected without being conscious is known (for example, see Patent Document 1).

FIG. 17 shows a conventional connecting structure of rotating shafts, in which the driving shaft 70 of the driving device is formed in a cylindrical shape, and a spring member 80 protruding from the inner peripheral surface thereof is provided in the slit portion 71 of the driving shaft 70. A concave groove 94 into which the spring is fitted is provided on the outer peripheral surface of the connecting shaft 90 of the rotating brush.
When the connecting shaft 90 is inserted into the cylinder of the drive shaft 70 at an arbitrary angle (without being aware of the position of the concave groove 94), the connection mechanism projects into the drive shaft 70 as shown in FIG. The spring 80 is pressed against the outer periphery of the connecting shaft 90 and pushed out of the slit 71.

In this state, as shown in FIG. 17C, when the drive shaft 70 is driven by the drive device, the drive shaft 70 rotates around the outer periphery of the connecting shaft 90 in the direction of arrow a, for example, and the spring 80 of the drive shaft 70 is connected. When the position of the concave groove 94 of the shaft 90 is reached, it is fitted into the concave groove 94 due to its elasticity.
Thereby, as shown in FIG. 17D, the connecting shaft 90 is automatically connected to the driving shaft 70 via the spring 80, and is driven by the driving device to swing in the direction of the arrow a or b.

JP 2010-65875 A (see paragraphs [0008], [0021]-[0022], FIG. 5 and the like)

The conventional rotating shaft connection structure uses a drive shaft spring that fits into a groove provided in the connection shaft to prevent rotation, and connects the connection shaft and drive shaft without being aware of the angle of the connection shaft. However, when the spring is plastically deformed to the outside of the drive shaft by an external force at the time of connection, there is a problem that the drive shaft is idle and cannot transmit the rotational force.
In addition, when the spring is plastically deformed inside the drive shaft, the spring is crushed at the time of connection, and there is a problem that the rotational force cannot be transmitted similarly.

  The present invention has been made to solve the above-described problems, and structurally prevents the plastic deformation of the spring due to an external force when the connecting shaft and the drive shaft are connected. An object of the present invention is to provide a rotating shaft connecting structure, a filter cleaning device, and an air conditioner that reliably connect the connecting shaft and the drive shaft by being arranged at the positions.

  The rotating shaft connecting structure according to the present invention is a rotating shaft connecting structure including a driving shaft for transmitting a rotational force, a connecting shaft connected to the driving shaft, and a spring portion provided on the driving shaft. The drive shaft has a cylindrical portion into which the connecting shaft is inserted, and the spring portion has a U-shaped bent portion facing the insertion direction in which the connecting shaft is inserted into the drive shaft. The connecting shaft has a concave groove portion into which the bent portion of the spring portion is fitted when the connecting shaft is inserted into the drive shaft.

  According to the rotating shaft connecting structure of the present invention, when the connecting shaft is mounted on the drive shaft, the plastic deformation of the spring due to an external force is structurally restricted, and the spring is arranged at a predetermined position with respect to the drive shaft. Thus, it is possible to provide a rotating shaft that reliably connects the connecting shaft and the drive shaft.

It is sectional drawing when a connecting shaft is inserted in the drive shaft which concerns on Embodiment 1 of this invention. It is a disassembled perspective view before incorporating a spring member in the drive shaft which concerns on Embodiment 1 of this invention. It is a perspective view of the spring member concerning Embodiment 1 of the present invention. It is a perspective view of the drive shaft which concerns on Embodiment 1 of this invention. It is a figure explaining the process in which the spring member (drive shaft) and connection shaft which concern on Embodiment 1 of this invention are connected. It is sectional drawing of the air conditioner provided with the filter cleaning apparatus which concerns on Embodiment 2 of this invention. It is a perspective view of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is a perspective view when the brush member of the filter cleaning unit which concerns on Embodiment 2 of this invention is removed. It is a perspective view when the brush member of the filter cleaning unit which concerns on Embodiment 2 of this invention is mounted | worn. It is a partial front view of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is the elements on larger scale of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is a perspective view of the cover body of the dust box which concerns on Embodiment 2 of this invention. It is a point figure at the time of attaching the dust box which concerns on Embodiment 2 of this invention to a filter cleaning unit. It is an action | operation figure of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is an action | operation figure of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is an action | operation figure of the filter cleaning unit which concerns on Embodiment 2 of this invention. It is the figure which showed the connection mechanism of the rotating shaft of the conventional filter cleaning apparatus.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view when a connecting shaft is inserted into a drive shaft according to Embodiment 1 of the present invention.
FIG. 2 is an exploded perspective view before the spring member is incorporated into the drive shaft according to Embodiment 1 of the present invention.
FIG. 3 is a perspective view of the spring member according to Embodiment 1 of the present invention.
FIG. 4 is a perspective view of the drive shaft according to Embodiment 1 of the present invention.
FIG. 5 is a diagram illustrating a process of connecting the spring member (drive shaft) and the connection shaft according to Embodiment 1 of the present invention.

1-5, the connection structure of the rotating shaft which concerns on Embodiment 1 is demonstrated.
As shown in FIG. 1, the connecting structure of the rotating shaft according to the first embodiment is configured such that the driving shaft 70 connected to the driving device and the connecting shaft 90 connected to the driven member are connected to each other to rotate the driving device. Is transmitted to the driven member.
Each member will be described below.

[Drive shaft]
The structure of the drive shaft 70 will be described.
The driving shaft 70 includes a substantially columnar driving device connecting portion 75 connected to the driving device, a cylindrical portion 73 into which the connecting shaft 90 is inserted, and a circle connecting the cylindrical portion 73 and the driving device connecting portion 75 on the front and back surfaces. The plate-like bottom portion 78 is configured to be larger.
A slit portion 71 cut out in the axial direction of the cylindrical portion 73 is opened in a part of the cylindrical portion 73 including the bottom portion 78. The slit portion 71 reaching the bottom portion 78 has a shape in which a part of the bottom portion 78 is cut into a U-shape. An abutting flat surface portion 74 is formed on the bottom surface of the slit portion 71 of the bottom portion 78 cut into the U-shape so that the tip of a spring member 80 described later abuts.

[Spring member]
The spring member 80 will be described.
As shown in FIG. 2, the spring member 80 is configured to function while being engaged with the drive shaft 70 from the drive device connecting portion 75 side of the drive shaft 70.
The spring member 80 is largely configured by an annular portion 81 that is inserted through the drive device coupling portion 75, a spring flat portion 82 that is bent at a right angle to the plane of the annular portion 81, and two engagement pieces 86. ing.

  The two engaging pieces 86 are formed with openings 88 that engage with engaging protrusions 76 provided on the outer peripheral surface of the cylindrical portion 73 of the drive shaft 70. When the spring member 80 is pushed in from the drive device connecting portion 75 side of the drive shaft 70, the engagement piece 86 is pushed by the engagement protrusion 76 and elastically deforms outward, and the engagement protrusion 76 is inserted into the opening 88 of the engagement piece 86. The shape is restored by fitting, and the drive shaft 70 and the spring member 80 are integrated.

[Shape that drive shaft and spring member are integrated]
Next, a shape in which the drive shaft 70 and the spring member 80 are integrated will be described.
When the drive shaft 70 and the spring member 80 are integrated, the spring flat portion 82 of the spring member 80 is disposed in the slit portion 71 of the drive shaft 70. The horizontal width of the spring plane portion 82 and the horizontal width of the slit portion 71 are substantially the same size.
A U-shaped bent portion 83 that bends to the inner peripheral side of the annular portion 81 is formed at the tip of the spring flat portion 82, and the bent portion 83 is a flat plate-like flat inclined from the axial direction of the drive shaft 70. A surface 84 is provided.
Furthermore, a tip flat portion 85 extending substantially parallel to the spring flat portion 82 is extended at the tip of the spring member 80 folded back at the bent portion 83. The tip flat surface portion 85 comes into contact with a contact flat portion 74 provided on the drive shaft 70.

A pair of convex portions 87 projecting outward are formed on two opposing sides of the spring flat portion 82. When the drive shaft 70 and the spring member 80 are integrated, the convex portion 87 is formed so as to be disposed in a cutout portion 77 formed in a concave shape on the side surface of the slit portion 71.
The convex part 87 and the notch part 77 are provided with a gap that does not contact when the spring flat part 82 is not deformed with respect to the annular part 81, that is, when both members maintain a substantially right angle relationship.

[Connection shaft]
The structure of the connecting shaft 90 will be described.
The connecting shaft 90 is largely composed of a substantially disc-shaped substrate 91, a driven member connecting portion 92 that is connected to the driven member, and a columnar fitting portion 93 that is inserted into the driving shaft 70.
The driven member connecting portion 92 and the fitting portion 93 are respectively formed on the front and back surfaces of the substrate 91.
On the outer peripheral surface of the cylindrical fitting portion 93, a concave groove portion 94 is formed in which the bent portion 83 and the tip flat portion 85 of the spring member 80 are fitted.
The recessed groove portion 94 is formed in a groove shape on the outer peripheral surface of the fitting portion 93 so as to be parallel to the axial direction of the connecting shaft 90.

[Step of connecting spring member (drive shaft) and connecting shaft]
FIGS. 5A to 5D are diagrams illustrating a process in which the spring member 80 (drive shaft 70) and the connection shaft 90 are connected.
First, FIG. 5A shows a state before the connecting shaft 90 is fitted on the drive shaft 70 side.
In this state, the annular portion 81 and the spring flat portion 82 of the spring member 80 are in a substantially right angle state, and the tip flat portion 85 of the spring member 80 protrudes into the cylindrical portion 73 of the drive shaft 70. .
Since the tip flat portion 85 of the spring member 80 is in contact with the contact flat portion 74 of the drive shaft 70, the position of the tip flat portion 85 is determined and the protrusion of the tip flat portion 85 protruding into the cylindrical portion 73 is projected. Dimensions are regulated within a certain value.

With this configuration, when the fitting portion 93 or the like of the connecting shaft 90 is inserted into the cylindrical portion 73 of the drive shaft 70, the bent portion 83 or the tip flat surface portion 85 of the spring member 80 is crushed in the cylindrical portion 73. It is possible to prevent plastic deformation.
Therefore, it becomes possible to prevent the driving force from being transmitted because the tip flat surface portion 85 cannot be fitted into the concave groove portion 94 of the connecting shaft 90.

Next, FIG. 5B shows a state in which the insertion portion 93 of the connecting shaft 90 is inserted into the cylindrical portion 73 of the drive shaft 70. In this state, the distal end side of the cylindrical fitting portion 93 first comes into contact with the flat surface 84 of the bent portion 83, and then the spring flat portion 82 is urged to be deformed so as to push the distal end flat portion 85 in the outer peripheral direction of the slit portion 71.
At this time, the spring flat portion 82 of the spring member 80 is deformed in the slit portion 71 toward the outer peripheral direction. Then, the convex portion 87 of the spring plane portion 82 moves in the outer peripheral direction within the cutout portion 77 of the drive shaft 70, and deformation of the spring plane portion 82 is restricted when it contacts the wall surface of the cutout portion 77. Become.

As described above, since the convex portion 87 of the spring plane portion 82 restricts the deformation of the spring plane portion 82 to the outer peripheral side within a certain value, the spring plane portion 82 is elastically deformed when the connecting shaft 90 is connected. This prevents the shape from being restored due to plastic deformation beyond the yield point toward the outer periphery.
Therefore, it becomes possible to prevent the driving force from being transmitted because the tip flat surface portion 85 cannot be fitted into the concave groove portion 94 of the connecting shaft 90.

In this state, as shown in FIG. 5C, when the drive shaft 70 is rotationally driven by the drive device, the cylindrical portion 73 of the drive shaft 70 rotates around the outer periphery of the connecting shaft 90 in the direction of the arrow a, for example. When the leading end flat portion 85 of 80 reaches the position of the concave groove portion 94 provided on the outer periphery of the fitting portion 93 of the connecting shaft 90, it fits into the concave groove portion 94 due to its elasticity.
As a result, as shown in FIG. 5D, the connecting shaft 90 and the driving shaft 70 are connected so as to transmit the driving force in the rotational direction of the shaft, and the driven member that rotates integrally with the connecting shaft 90 is driven. It is connected to the shaft 70 and can be rotated in the direction of arrow a or b by being driven to rotate by a driving device.

  For example, when the driving shaft 70 is driven by the driving device, the connecting shaft 90 of the driven member is integrated with the driving shaft 70 via the spring member 80 so that the driven member is It is connected to the drive shaft 70.

  As described above, the drive shaft 70 and the spring member 80 are integrated, and the distal end flat portion 85 of the spring member 80 is released from elastic deformation during the rotation of the drive shaft 70 and fits into the concave groove portion 94 of the connecting shaft 90. Therefore, it becomes possible to insert the fitting portion 93 of the connecting shaft 90 with respect to the drive shaft 70 at an arbitrary angle in the circumferential direction, and it is possible to mount the driven member without worrying about the mounting angle.

  As described above, the spring member 80 has a configuration in which the bent portion 83 is provided at the tip of the spring flat portion 82 and the tip flat portion 85 that is folded back at the bent portion 83 and substantially parallel to the spring flat portion 82. At the same time, since the spring flat portion 82 is prevented from plastically deforming beyond the regulation value of the deformation amount to the inner peripheral side and the outer peripheral side of the drive shaft 70 in the slit portion 71, the tip flat portion 85 is recessed in the connecting shaft 90. It is possible to prevent the driving force from being not transmitted because the groove portion 94 cannot be fitted.

Embodiment 2. FIG.
Next, an embodiment when the rotating shaft coupling structure according to the second embodiment is adopted for the rotating shaft of the filter cleaning device will be described.
FIG. 6 is a cross-sectional view of an air conditioner including a filter cleaning unit according to Embodiment 2 of the present invention.
FIG. 7 is a perspective view of a filter cleaning unit according to Embodiment 2 of the present invention.
FIG. 8 is a perspective view when the brush member of the filter cleaning unit according to Embodiment 2 of the present invention is removed.
FIG. 9 is a perspective view when the brush member of the filter cleaning unit according to Embodiment 2 of the present invention is mounted.
FIG. 10 is a partial front view of the filter cleaning unit according to Embodiment 2 of the present invention.
FIG. 11 is a partially enlarged view of the filter cleaning unit according to Embodiment 2 of the present invention.

6-11, the structure of the air conditioner provided with the filter cleaning unit which concerns on Embodiment 2 is demonstrated.
A front plate 2 that can be opened and closed is provided on the front side of the main body case 1 of the air conditioner, and an integrally formed filter cleaning unit 60 is built in the main body case 1.
A grill-like air suction port 3 is provided on the upper surface of the filter cleaning unit 60. A heat exchanger 4 is disposed on the downstream side (inside) of the air suction port 3, and a blower 5 that sucks air from the air suction port 3 is installed on the downstream side thereof. An air outlet 7 is provided on the downstream side of the blower 5 through a duct 6.

  Inside the front plate 2 and the air suction port 3, an outer guide rail 8 a and an inner guide rail 8 b are provided so as to face each other from the upper part on the front side of the filter cleaning unit 60 to the rear part on the upper side. . Further, a central guide 9 is provided between the outer guide rail 8a and the inner guide rail 8b from the front surface side to the upper surface side of the filter cleaning unit 60 so that the distance between both guide rails is increased. The distance between the guide rails is narrowed from the upper surface side to the rear part.

  Filter passages 10a and 10b are formed between the outer guide rail 8a and the central guide 9, and between the inner guide rail 8b and the central guide 9, respectively. 10b is integrated, and a filter passage 10c is formed between the outer guide rail 8a and the inner guide rail 8b. A rear end portion of the inner guide rail 8b is formed in a substantially U shape (hereinafter referred to as a groove-like portion 8c), and a limit switch such as a micro switch connected to the control unit (both not shown) is provided near the bottom portion. Is provided.

A substantially arc-shaped lower guide rail 11 is disposed between front end portions on the front side of the outer guide rail 8a and the inner guide rail 8b (below the central guide 9). A filter passage 10 d is formed along the lower guide rail 11.
The air filter 15 for removing dust is provided on a flexible frame, and racks 16 are provided on the inner side (back side) on both sides in the width direction. The front end of the air filter 15 is located in the vicinity of the lower guide rail 11, the rear end is located in the groove 8c, and moves in the filter passages 10a, 10b, 10c, and 10d along the outer guide rail 8a. It is arranged to be possible.

On the inner side of the lower guide rail 11 (between the central guide 9), gear-like filter driving units 20 are rotatably provided on both sides of the shaft 21, and mesh with the rack 16 of the air filter 15.
The filter cleaning unit 60 is provided with a drive unit 25 for the filter drive unit 20 to drive the filter drive unit 20 and simultaneously drive a cylindrical drive shaft 70 that drives a brush member 50 described later. The filter drive unit 20 and the drive shaft 70 of the brush member 50 are driven by a single motor via a gear mechanism or the like, but may be driven by different motors.

[Dust box]
Next, the structure of the dust box of the filter cleaning unit according to the second embodiment will be described with reference to FIGS.
FIG. 10 is a partial front view of the filter cleaning unit according to Embodiment 2 of the present invention.
FIG. 11 is a partially enlarged view of the filter cleaning unit according to Embodiment 2 of the present invention.
FIG. 12 is a perspective view of a dust box lid according to Embodiment 2 of the present invention.
FIG. 13 is a schematic diagram for attaching the dust box according to Embodiment 2 of the present invention to the filter cleaning unit.

Below the outer guide rail 8a and the inner guide rail 8b of the filter cleaning unit 60 (below the lower guide rail 11), a dust box 30 that is detachably mounted on the filter cleaning unit 60 is mounted.
The width of the dust box 30 in the left-right direction is substantially equal to the width of the air filter 15, and the thickness in the front-rear direction is formed to be substantially equal to the distance between the outer guide rail 8a and the inner guide rail 8b. It consists of a box 31 and a lid 32 detachably attached to the dust collection box 31.

  A brush member 50 is detachably attached to the lid 32. The brush member 50 includes a brush holder 51 and a brush 52 having a length substantially equal to the width of the air filter 15 provided on the brush holder 51. At one end of the brush holder 51, a disc-shaped flange 53 having a protrusion 54 on the outer periphery (opposite the brush 52) is provided. On the outer surface side of the flange portion 53, a columnar connecting shaft 90 is provided that is concentric with the flange portion 53 and has a smaller diameter than the flange portion 53 and is fitted and connected to the drive shaft 70 of the drive device 25. A support shaft 56 is provided at the other end of the brush holder 51.

  The lid 32 of the dust box 30 has a front plate 33 and a rear plate 34 as shown in FIGS. 11 and 12, and an arcuate bottom 35 corresponding to the lower guide rail 11 is formed between them. An opening 36 is provided in the longitudinal direction of the central portion of 35. In the longitudinal direction on both sides of the opening portion 36 of the bottom portion 35, a large number of claw portions 37 a and 37 b that are provided downward and scrape off dust adhering to the brush 52 are formed. Note that a substantially U-shaped filter passage 10 d is formed between the lower guide rail 11 and the bottom 35.

  Filter guides 38a and 38b are provided on both sides of the front plate 33, and attachment portions 39a and 39b of the dust collection box 31 provided on both sides of the front plate 33 and the rear plate 34 are formed. An attachment stopper 40 is provided in the vicinity of one filter guide 38b, and includes a stopper shaft 40a that is engaged with an engaging portion 60a (see FIG. 13) provided in the filter cleaning unit 60.

  One mounting portion 39a has a holding hole 41 having a bearing function through which the connecting shaft 90 of the brush member 50 is inserted, and protrusions 54 of the brush member 50 abut on both sides thereof to restrict the rotation range. Stoppers 42a and 42b are provided. A bearing portion 43 that supports the support shaft 56 of the brush member 50 is opened in the other attachment portion 39b. The bearing 43 also has a role of positioning when the dust box 30 is attached to the filter cleaning unit 60.

  As shown in FIG. 13A, the dust box 30 is inserted on one side (left side in the figure) between the filter cleaning unit 60 and the driving device 25, and obliquely pressed in the direction of the arrow X to The connecting shaft 90 is fitted into the drive shaft 70. Next, as shown in FIG. 13B, the other side (right side in the figure) of the dust box 30 is pushed up in the arrow Y direction, and the stopper shaft 40a of the mounting stopper 40 is locked to the locking portion 60a of the filter cleaning unit 60. . In this way, the dust box 30 is held at a predetermined position of the filter cleaning unit 60, and the attachment is completed. In addition, you may make it fix the cover body 32 to the filter cleaning unit 60 as needed.

  At this time, the connecting shaft 90 provided at one end of the brush member 50 passes through the holding hole 41 of the lid body 32, and the flange 53 provided integrally with the connecting shaft 90 is held in the holding hole 41 having a bearing function, Since the support shaft 56 provided at the other end is supported by the bearing portion 43, positioning at the time of attaching the dust box 30 is easy. In addition, the brush member 50 is provided with no special parts or the like, and the lid body 32 is provided. Is supported rotatably.

[Operation of filter cleaning unit]
Next, the effect | action of the air conditioner provided with the filter cleaning unit 60 is demonstrated in FIGS.
14 to 16 are operation diagrams of the filter cleaning unit according to the second embodiment.
In the initial state, as shown in FIGS. 1 and 6, the filter cleaning unit 60 is located in the filter passages 10c and 10a from the inside (downstream side) of the air suction port 3 to the upper part on the front side. The rack 16 near the front end on the front side is engaged with the filter driving unit 20. The dust box 30 is attached to the main body case 1 below the lower guide rail 11, and the tip of the brush 52 of the brush member 50 is located in the filter passage 10d from the opening 36 of the lid 32 of the dust box 30. .

  In the air conditioner as described above, the air sucked from the air suction port 3 by the blower 5 is cleaned by the dust 58 contained therein being captured by the air filter 15 and cooled or heated by the heat exchanger 4. Then, it becomes cold air or warm air, and is blown out into the room from the air outlet 7.

  When a certain period of time has elapsed, the blower 5 is stopped by a command from a control unit (not shown), and then the filter drive unit 20 is driven by the drive unit 25 as shown in FIG. As a result, the air filter 15 meshing with the filter drive unit 20 moves in the direction of the arrow e in the filter passages 10a and 10c (hereinafter sometimes referred to as advance), and as shown in FIG. It is sent to the filter passages 10b and 10c through a U-shaped filter passage 10d formed between the bottom 35 of the lid 32 of the dust box 30.

  During this time, as shown in FIG. 14, the brush 52 of the brush member 50 contacts the surface of the air filter 15, scrapes dust 58 adhering thereto and drops it into the dust collection box 31, and also drives the driving device 25. 15 and 16, as shown in FIG. 15 and FIG. 16, it rotates constantly or intermittently in the range of about 180 ° in the direction of the arrow a or the direction of the arrow b (hereinafter, this action is shaken). It is called).

  As a result, the dust 58 adhering to the brush 52 is scraped off by the claw portions 37 a or 37 b provided on the lid body 32, and falls and accumulates in the dust collection box 31. The swing range of the brush member 50 at this time is regulated by the protrusion 54 provided on the flange 53 contacting the stopper 42a or 42b provided on the lid 32.

When the air filter 15 moves in the filter passage 10c and its tip reaches the groove-like portion 8c and contacts the limit switch, the drive device 25 is stopped by a command from the control unit, and the air filter 15 moves accordingly. Also stop.
Next, as shown in FIG. 16, the filter drive unit 20 is rotationally driven in the opposite direction (arrow d direction) by the command of the control unit, and the air filter 15 is moved in the arrow f direction opposite to the previous time (hereinafter, reverse) That is). And when the front-end | tip part reaches the groove-shaped part 8c of the filter channel | path 10c and contacts a limit switch, the filter drive part 20 will stop again.

  During this time, as in the forward movement, the brush 52 of the brush member 50 contacts the surface of the air filter 15 and scrapes off the dust 58 remaining on the air filter 15 and swings in the direction of arrow a or b to move the claw. Dust 58 attached to the brush 52 is scraped off by the portions 37a and 37b. As a result, the clean air filter 15 from which the dust 58 has been removed returns to the state shown in FIG. 1 and is located downstream of the air suction port 3.

  When the dust 58 accumulated in the dust collection box 31 of the dust box 30 is discarded, the stopper shaft 40a of the mounting stopper 40 is moved from the state shown in FIG. ), The dust box 30 is moved obliquely in the opposite arrow X direction while moving the mounting stopper 40 downward, the connecting shaft 90 of the brush member 50 is pulled out from the drive shaft 70, and the dust box 30 is taken out downward.

Then, the lid 32 having the brush member 50 is rotated and opened from the dust collection box 31, the dust 58 in the dust collection box 31 is discarded, and the lid 32 is mounted again. The lid 32 may be removed as necessary, or the brush 52 may be removed from the lid 32 and cleaned by washing or the like.
When the dust box 30 is removed from the main body case 1, the drive shaft 70 and the spring member 80 that is easily deformed attached to the drive shaft 70 remain on the filter cleaning unit 60 side. The spring member 80 will not be deformed or damaged when it is discarded or when the brush member 50 is cleaned, and will not be lost.

  When the dust 58 is discarded, the dust box 30 is attached to the filter cleaning unit 60 again. The procedure for attaching the dust box 30 to the filter cleaning unit 60 is as described above. In this case, the dust box 30 may be fitted into the drive shaft 70 without worrying about the angular position of the connecting shaft 90 of the brush member 50. Mounting to the filter cleaning unit 60 is very easy.

  In the above description, the case where the drive shaft 70 provided in the drive device 25 of the filter cleaning unit 60 is formed in a cylindrical shape and the connecting shaft 90 of the brush member 50 fitted thereto is formed in a cylindrical shape is shown. The drive shaft 70 may be formed in a columnar shape to provide the recessed groove portion 94, the connecting shaft 90 may be formed in a cylindrical shape that fits to the outer periphery of the drive shaft 70, and the slit portion 71 may be provided.

  In the above description, the case where the filter cleaning unit 60 is operated after a certain period of time has elapsed after the air conditioner has been operated has been shown. The filter cleaning unit 60 may be operated by operating the built-in filter cleaning mode, and the air filter 15 may be cleaned.

  Furthermore, although the case where the filter cleaning unit 60 which concerns on this invention was integrated in the illustrated air conditioner was shown, it is not limited to this, It can incorporate also in the air conditioner of another structure. Further, the filter cleaning unit 60 according to the present invention can be incorporated in other devices such as an air cleaning device.

  According to the present invention configured as described above, when the dust box 30 including the brush member 50 for cleaning the air filter 15 is attached to the main body case 1, the connection is made without being aware of the angular position of the brush member 50. Since the shaft 90 can be fitted and connected to the drive shaft 70 of the drive device 25, the mounting operation is extremely easy.

  Further, since the holding body 41 having a bearing function for holding the flange 53 provided in the brush member 50 is provided in the lid 32 of the dust box 30 to which the brush member 50 is mounted, the connecting shaft 90 is fitted to the drive shaft 70. Positioning at the time of joining is easy, and the brush member 50 can be reliably supported by the flange portion 53 and the support shaft 56 without using other fixing parts.

  Further, when the dust 58 attached to the air filter 15 is removed by the brush 52 of the brush member 50, the brush 52 is swung constantly or intermittently within a range of about 180 ° and is moved to the brush 52 by the claw portions 37a and 37b. Since the adhering dust 58 is removed, the brush 52 can always be kept clean, and thereby the cleaning ability of the air filter 15 can be enhanced.

Moreover, according to the air conditioner provided with the filter cleaning unit 60 as described above, dust attached to the air filter 15 can be reliably removed, so that an increase in air resistance due to dust on the air filter 15 is prevented. Thus, energy saving can be improved.
Moreover, since the air filter 15 with low air resistance is obtained, the amount of air flowing into the heat exchanger 4 can be increased, so that the heat exchange performance can be improved, and thus the performance of the air conditioner can be improved.

  Although it has been described that the rotating shaft coupling structure of the present invention can be applied to the filter cleaning apparatus as in the second embodiment, for example, rotation of a paper feed mechanism such as an electronic copying machine, various printers, and a facsimile machine. A variety of applications, such as a rotating shaft of a rotary brush provided on a suction head of a vacuum cleaner, a rotating shaft of a wind direction plate rotating an air conditioner, a rotating shaft of a blower, etc. The applicable range is not limited to the above embodiment.

  DESCRIPTION OF SYMBOLS 1 Main body case, 2 Front plate, 3 Air inlet, 4 Heat exchanger, 5 Blower, 6 Duct, 7 Air outlet, 8a Outer guide rail, 8b Inner guide rail, 8c Groove part, 9 Central guide, 10a- 10d filter passage, 11 lower guide rail, 15 air filter, 16 rack, 20 filter drive unit, 21 shaft, 25 drive unit, 30 dust box, 31 dust collection box, 32 lid, 33 front plate, 34 rear plate, 35 bottom 36 Opening, 37a, 37b Claw, 38a, 38b Filter guide, 39a, 39b Mounting part, 40 Mounting stopper, 40a Stopper shaft, 41 Holding hole, 42a, 42b Stopper, 43 Bearing part, 50 Brush member, 51 Brush Holder, 52 brush, 53 collar, 54 protrusion, 56 support shaft, 58 dust , 60 Filter cleaning unit, 60a Locking part, 70 Drive shaft, 71 Slit part, 73 Cylindrical part, 74 Abutting plane part, 75 Drive device connecting part, 76 Engaging projection, 77 Notch part, 78 Bottom part, 80 Spring member , 81 Annular part, 82 Spring flat part, 83 Bent part, 84 Flat face, 85 Tip flat part, 86 Engagement piece, 87 Convex part, 88 Opening, 90 Connecting shaft, 91 Base part, 92 Driven member connecting part, 93 Insertion part, 94 concave groove part.

Claims (13)

A rotating shaft coupling structure comprising a driving shaft for transmitting rotational force, a coupling shaft coupled to the driving shaft, and a spring portion provided on the driving shaft,
The drive shaft has a cylindrical portion into which the connecting shaft is inserted,
The spring portion has a U-shaped bent portion facing the insertion direction in which the connecting shaft is inserted into the drive shaft,
The connecting shaft has a concave groove portion into which a bent portion of the spring portion is fitted when the connecting shaft is inserted into the drive shaft. The spring part has one end fixed to the drive shaft and arranged parallel to the central axis of the cylindrical part, and a second plane located in the cylindrical part substantially parallel to the first flat part. And the bent portion connecting the other end of the first plane portion and the second plane portion,
The rotating shaft coupling structure according to claim 1, wherein the coupling shaft is provided with a concave groove portion into which the second flat surface portion is fitted when the coupling shaft is inserted into the drive shaft.   A pair of convex portions that abut against the drive shaft and restrict deformation when the first planar portion is deformed in the outer peripheral direction of the cylindrical portion on the side portions of the spring portion facing the first planar portion. The rotating shaft coupling structure according to claim 1, wherein the rotating shaft coupling structure is provided.   2. The drive shaft is provided with a contact flat surface portion that abuts a second flat portion of the spring portion and restricts deformation of the spring portion into a cylindrical portion of the drive shaft. The connection structure of the rotating shaft of any one of -3. The bent portion of the spring portion has a flat plate-like flat surface with which the connecting shaft comes into contact when the connecting shaft is inserted into the drive shaft.
The rotating shaft coupling structure according to any one of claims 1 to 4, wherein the flat surface has an angle inclined with respect to a central axis of the cylindrical portion.   6. The rotating shaft connection according to claim 1, wherein the cylindrical portion of the drive shaft has a slit portion that opens, and the spring portion is accommodated in the slit portion. Construction.   The connection shaft is detachable in an axial direction in a state where the connection shaft inserted into the cylindrical portion of the drive shaft presses the spring portion outward. The connecting structure of the rotating shaft according to the item.   An air filter that moves along an air suction port, a brush member that has the connecting shaft at one end and swings to remove dust adhering to the air filter, and the connecting shaft of the brush member is inserted into the brush The filter cleaning apparatus provided with the connection structure of the rotating shaft of any one of Claims 1-7 which has a drive shaft.   The filter cleaning apparatus according to claim 8, wherein a dust box to which the brush member is attached is detachably attached.   The dust box includes a dust collection box and a lid, and a holding hole into which the connecting shaft of the brush member is inserted is provided on one side of the lid, and the brush member is supported on the other side of the lid. The filter cleaning apparatus according to claim 9, further comprising a bearing that supports the portion.   11. The filter cleaning device according to claim 9, wherein the dust box has a claw portion that removes dust attached to the swinging brush member along both longitudinal sides of the brush member.   The connecting shaft of the brush member provided on one side of the dust box is connected to the drive shaft, and the mounting stopper provided on the other side of the dust box is locked to the locking portion of the filter cleaning device, The filter cleaning device according to any one of claims 9 to 11, wherein a dust box is attached to the filter cleaning device.   An air conditioner comprising the filter cleaning device according to any one of claims 8 to 12.

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