JP2018000304A - Floor washing machine - Google Patents

Abstract

An object of the present invention is to prevent splashing of cleaning water around. A floor cleaning machine is attached to an annular pad mounting body 27 having a cleaning pad 25 attached to the lower surface and an engagement portion 30 opened in the center, and the engagement portion 30 of the pad mounting body 27. And a mounting tool 28 that transmits the rotation of the motor to the pad mounting body 27, a circumferential wall 35 that is erected on the upper surface side of the pad mounting body 27 so as to surround the mounting tool 28, and the circumferential wall 35. A water supply means for supplying cleaning water to the inner area 55 and a drain outlet formed at a position lower than the upper end of the circumferential wall 35 in the inner area 55 and allowing the cleaning water supplied from the water supply means to pass therethrough and dripping onto the floor surface 4 41. [Selection] Figure 8

Description

  The present invention relates to a floor cleaning machine for cleaning a floor surface by bringing a cleaning pad rotated by a motor into contact with the floor surface.

  2. Description of the Related Art Conventionally, a floor cleaning machine that cleans a floor while rotating a cleaning pad at high speed with a motor is known. In this type of floor cleaning machine, cleaning water is supplied to the floor surface when the floor surface is cleaned.

  For example, in Patent Document 1, a groove for receiving cleaning water is provided around a mounting hole in the upper central rotating disk of a donut-shaped floor brush, and a horizontal hole is provided on a vertical surface of the outer frame of the groove. In addition, an upper water supply type floor brush is disclosed in which a vertical pipe leading to the brush tip is provided at the end of each horizontal hole.

  Further, in Patent Document 2, a cleaning tool (cleaning pad) is attached to a lower surface of a plate having a drain port via a surface fastener, and the cleaning water supplied to the upper surface of the plate is sprinkled from the drain port to the floor surface. A face washer is disclosed.

  Further, in Patent Document 3, the floor surface is cleaned by rotating the cleaning tool at a high speed with a motor while dripping the cleaning water on the floor surface in the vicinity of the cleaning tool through a water supply hose, and the cleaning water is washed at the time of cleaning. There has been disclosed a floor cleaning machine provided with a splash guard so as not to diffuse around the tool.

JP 2003-299602 A JP 2012-192272 A JP 2012-217626 A

  However, in the structure described in Patent Document 1 described above, when the brush hair is worn, the vertical pipe that supplies the cleaning water to the floor surface is also shaved together. Difficult to supply. Moreover, the structure of the upper water supply type floor brush of patent document 1 cannot be applied to a floor cleaning machine that employs a cleaning pad made of melamine foam or other non-woven fabric.

  In the structure in which the cleaning water supplied to the upper surface of the plate is sprinkled from the drain port to the floor surface as described in Patent Document 2 described above, the cleaning tool (cleaning pad) does not pass through the drain port. There is a possibility that the absorbed cleaning water may be scattered around the cleaning tool by the centrifugal force of high speed rotation. Therefore, since it is necessary to provide a splash guard around the cleaning tool, the structure becomes complicated, which causes an increase in cost. Further, if the periphery of the cleaning tool is covered with the splash guard, there is a problem that it takes time to replace the cleaning tool.

  Furthermore, in the floor surface washer described in Patent Document 3 described above, the floor surface is cleaned by rotating the cleaning tool at high speed while dripping the cleaning water onto the floor surface in the vicinity of the cleaning tool via the water supply hose. It is difficult to prevent splashing of cleaning water. Further, if a splash guard is provided so that the cleaning water does not diffuse around the cleaning tool, there is a problem that the cost may increase.

  Therefore, the present invention has been made to solve the above-described problems, and even if a splash guard is not installed, the cleaning water is not scattered around, and the cleaning water can be efficiently supplied to the floor surface. An object of the present invention is to provide a floor cleaning machine that can easily perform a replacement operation of a cleaning pad.

  In order to achieve the above-described object, the present invention provides a floor cleaning machine for cleaning a floor surface by bringing a cleaning pad rotated by a motor into contact with the floor surface, the cleaning pad being attached to a lower surface, A ring-shaped pad attachment body having an engagement portion opened to the pad attachment body, an attachment device attached to the engagement portion of the pad attachment body and transmitting rotation of the motor to the pad attachment body, and surrounding the attachment device A circumferential wall erected on the upper surface side of the pad mounting body, a water supply means for supplying cleaning water to the inner region surrounded by the circumferential wall, and a position lower than the upper end of the circumferential wall in the inner region And a drain outlet through which the wash water supplied from the water supply means is passed and dropped onto the floor surface.

  By adopting such a configuration, it is possible to prevent the cleaning water supplied to the inner region from being scattered on the upper surface or the like of the pad attachment body by the circumferential wall. Therefore, even if a splash guard is not provided to prevent splashing of the cleaning water, the cleaning water before dripping onto the floor surface due to the centrifugal force caused by the rotation of the cleaning pad does not splash around the cleaning pad or the pad mounting body. . Therefore, the wash water can be used efficiently and water saving can be achieved.

  In the floor cleaning machine according to the present invention, the inner peripheral surface of the circumferential wall is formed to be inclined so that the inner diameter gradually increases downward.

  By adopting such a configuration, even if the cleaning water supplied to the inner region bounces off with a fixture or the like, it flows along the inner surface of the circumferential wall and is dropped from the drain port onto the floor surface. It is possible to reliably prevent scattering on the upper surface of the pad mounting body. In addition, the height of the circumferential wall can be kept low, and the floor surface cleaning pad unit composed of the cleaning pad and the pad mounting body can be made thin.

  In the floor cleaning machine according to the present invention, the floor cleaning machine includes an inlay portion extending on a lower surface side of the pad mounting body so as to be fitted to an inner peripheral surface of the cleaning pad, and the cleaning pad is a lower surface of the pad mounting body The spigot part is attached via a hook-and-loop fastener that is attached to the surface of the cleaning pad, and is formed so as to cover at least a range from the height separated from the lower surface of the cleaning pad to the hook-and-loop fastener.

  By adopting such a configuration, it is possible to prevent the portion where the surface fastener is attached to the pad attachment body from being immersed in the cleaning water by the inlay portion, so that the pad attachment body and the surface fastener are attached. Can be maintained stably.

  In the floor cleaning machine according to the present invention, the spigot part and the circumferential wall are integrally molded with the pad attachment body, and the attachment tool is formed of a metal member.

  By adopting such a configuration, it is possible to reduce the cost without increasing the weight of the pad mounting body while ensuring a predetermined strength in the portion to which the rotational torque is applied.

  The floor cleaning machine according to the present invention further includes a sleeve that is attached to a rotary shaft that extends downward from the motor and that has a locked portion on an outer peripheral side surface, and the fitting can accommodate the sleeve. And a locking means for locking the sleeve from the recess by locking the sleeve to the locked portion from the side in a state where the sleeve is accommodated in the recess. The means is characterized in that a flat portion is formed in an upper part of a portion passing through the inner region of the circumferential wall.

  By adopting such a configuration, even if cleaning water is dropped on the upper part of the locking means, the cleaning water is not repelled and scattered outside the circumferential wall, and the rotation direction of the floor cleaning pad unit Move along and fall into the inner area. Therefore, even if a splash guard is not provided to prevent cleaning water from splashing, the cleaning water before dripping onto the floor surface due to the centrifugal force generated by the rotation of the floor surface cleaning pad unit will scatter around the floor surface cleaning pad unit. There is no.

  In the floor cleaning machine according to the present invention, a receiving portion is formed on an inner side from an inner peripheral surface of the circumferential wall, and the receiving portion is spaced from the outer circumferential portion of the fixture with the circumferential wall. A flange portion that can be fixed from above is formed, and the drain port is formed in the receiving portion at a portion corresponding to the gap.

  By adopting such a configuration, a large difference in height between the upper end of the circumferential wall and the drainage port can be ensured, so that the washing water can be more reliably prevented from scattering. Moreover, the height of the circumferential wall can be kept low, and the floor cleaning pad unit can be made thin.

  In the floor cleaning machine according to the present invention, a receiving recess is formed in the lower portion of the inner peripheral surface of the pad mounting body, and a flange portion that can be fixed to the receiving recess from below is formed in the outer peripheral portion of the fixture. In the flange portion, the drain port is formed inside a portion corresponding to the receiving recess.

  By adopting such a configuration, the floor cleaning pad unit can be easily manufactured because the floor cleaning pad unit has a shape that can be easily pulled downward with a mold.

  According to the present invention, the cleaning water can be efficiently supplied to the floor without splashing the surroundings without installing the splash guard, and the floor surface cleaning pad unit can be easily replaced. Various excellent effects can be obtained.

It is a perspective view which shows the floor cleaning machine which concerns on embodiment of this invention from the right front. It is a perspective view which shows the front lower part of the floor cleaning machine which concerns on embodiment of this invention from the right front. It is explanatory drawing which shows the principal part of the floor cleaning machine which concerns on embodiment of this invention. It is a disassembled perspective view which shows the connection structure of the motor and floor surface cleaning pad unit in the floor surface cleaning machine which concerns on embodiment of this invention. It is a top view which shows the floor cleaning pad unit of the floor cleaning machine which concerns on embodiment of this invention. It is AA sectional drawing of FIG. It is a perspective view which shows the latching means of the floor cleaning machine which concerns on embodiment of this invention. In the floor cleaning machine which concerns on embodiment of this invention, it is sectional drawing which shows the state which is cleaning the floor surface with a cleaning pad. In the floor cleaning machine which concerns on embodiment of this invention, (a) is explanatory drawing which shows the state in which cleaning water scatters when the plane part is not formed in the upper part of a latching means, (b) It is explanatory drawing which shows the state in which a wash water does not scatter when the plane part is formed in the upper part of a latching means. In the floor cleaning machine which concerns on embodiment of this invention, (a) is sectional drawing which shows the state in the process which is removing the floor cleaning pad unit, (b) is a motor for a floor cleaning pad unit. It is sectional drawing which shows the state isolate | separated from and dropped. It is sectional drawing which shows the floor cleaning pad unit of the floor cleaning machine which concerns on another embodiment of this invention. In the floor cleaning machine which concerns on another embodiment of this invention, (a) is sectional drawing which shows the state in the process which has removed the floor cleaning pad unit, (b) is a floor cleaning pad unit. It is sectional drawing which shows the state which isolate | separated and removed from the motor. It is a disassembled perspective view which shows the floor cleaning pad unit in the floor cleaning machine which concerns on another embodiment of this invention. It is sectional drawing which shows the state which is wash | cleaning the floor surface with a washing | cleaning pad in the floor surface washing machine which concerns on another embodiment of this invention.

  Hereinafter, the floor cleaning machine 1 according to the embodiment of the present invention will be described with reference to FIGS. In the following description, for the sake of convenience, the front-rear and left-right directions are determined with the traveling direction side (the right front side in FIG. 1) of the floor cleaning machine 1 as the front side.

  As shown in FIG. 1, the floor cleaning machine 1 includes a box-shaped main body 2 that is long in the front-rear direction, a motor 3 that is housed in a front lower portion in the main body 2, and a main body 2 that is below the motor 3. A floor surface cleaning pad unit 5 provided between the floor surface 4 (see FIG. 8 and the like), a front cover 6 provided so that the front part of the main body 2 can be opened, and a lifting device 7 provided adjacent to the motor 3. (See FIG. 3), a fresh water tank 8 provided in the main body 2, a squeegee 9 provided in the lower back of the main body 2 and extending in the left-right direction, a recovery tank 10 accommodated in the upper part of the main body, and a main body 2 and a handle 11 provided on the rear upper side.

  As shown in FIG. 3, a main body chassis 12 is provided substantially in parallel with the floor surface 4 at a lower portion in the main body 2. Wheels 13 for traveling (see FIG. 1) are pivotally supported on the front and rear portions of the lower surface of the main body chassis 12, respectively. A battery which is a driving power source (not shown) is supported at the rear portion of the main body chassis 12.

  A pair of base plates (not shown) are fixed to the upper surface of the main chassis 12. The pair of base plates support a rectangular tube-shaped main body frame 14, and the main body frame 14 supports a pair of left and right guide plates 15 so as to be slidable in the vertical direction. A connecting plate 16 is installed on the upper part of the pair of left and right guide plates 15, and a motor base 17 that supports the motor 3 is fixed to the lower ends of the pair of left and right guide plates 15. With such a configuration, the motor base 17 is supported by the main body chassis 12 so as to be movable up and down.

  As shown in FIG. 4, the motor 3 is provided with a motor shaft (not shown) facing downward, and a reduction mechanism (not shown) housed in the housing case 18 is provided on the motor shaft. And connected to a rotating shaft 19 of the motor 3 protruding downward from the storage case 18.

  A cylindrical sleeve 20 is attached downward to the lower end of the rotating shaft 19 of the motor. A shaft hole 21 is provided on the upper surface of the sleeve 20, and a screw hole 22 is formed in the upper portion of the sleeve 20 from the outer peripheral surface to the shaft hole 21 in the horizontal direction. Then, with the rotary shaft 19 of the motor 3 fitted in the shaft hole 21 of the sleeve 20, the screw 79 passed through the screw hole 22 is fastened to the rotary shaft 19. It is comprised so that it may be connected. A key (not shown) may be mounted between the rotary shaft 19 and the shaft hole 21.

  Claw portions 23 project radially from the lower portion of the outer peripheral surface of the sleeve 20. A number of claw portions 23 are formed at equal intervals on the circumference of the outer peripheral surface of the sleeve 20. Each claw portion 23 has a shape that is long in the vertical direction, and the lower end portion (boss side end portion) of each claw portion 23 has a tapered shape. An annular groove 24 serving as a locked portion is provided above the claw portion 23 at the center in the vertical direction of the outer peripheral surface of the sleeve 20.

  3 to 6, the floor surface cleaning pad unit 5 includes a cleaning pad 25 that contacts the floor surface 4 (see FIG. 8 and the like), and the upper surface of the cleaning pad 25 via a surface fastener 26. And a pad mounting body 27 that is detachably joined and supported, and a mounting tool 28 that is connected to the sleeve 20 and transmits the rotation of the motor 3 to the pad mounting body 27.

  The cleaning pad 25 is formed with a thickness of about 30 mm using a material such as compressed melamine foam or nonwoven fabric. The cleaning pad 25 has an annular plate shape having a pad side communication hole 29 in the center. The hook-and-loop fastener 26 has the same annular shape as the cleaning pad 25 in a plan view, and is attached to the lower surface of the pad mounting body 27.

  The pad mounting body 27 is integrally molded with resin. The pad attachment body 27 has an annular shape having a pad attachment body side communication hole 30 as an engaging portion at the center, and the attachment tool 28 is fixed so as to close the pad attachment body communication hole 30. The pad mounting body 27 is formed so that the outer peripheral portion of the pad mounting body 27 coincides with the outer peripheral surface 31 of the cleaning pad 25, and the inner peripheral portion 32 of the pad mounting body 27 is inside the inner peripheral surface 33 of the cleaning pad 25. It is formed to protrude.

  An inlay portion 34 extends downward on the lower surface side of the inner peripheral portion 32 of the pad mounting body 27 so as to be fitted to the inner peripheral surface 33 of the cleaning pad 25. The inlay portion 34 is formed so as to cover at least a range from the height separated from the lower surface of the pad mounting body 27 to the inner peripheral surface of the hook-and-loop fastener 26. Specifically, the inlay portion 34 has a height of the pad mounting body 27 so that the end portion of the inlay portion 34 does not contact the floor surface 4 even when the cleaning pad 25 is pressed against the floor surface 4 during the cleaning operation. It protrudes further downward from the lower surface (mounting surface of the hook-and-loop fastener 26).

  A circumferential wall 35 is erected on the upper surface side of the inner peripheral portion 32 of the pad mounting body 27 so as to surround the mounting tool 28 provided in the pad mounting body communication hole 30. The circumferential wall 35 is formed on the upper extension line of the spigot part 34. In addition, it is preferable that the inner peripheral surface of the circumferential wall 35 is formed to be inclined so that the inner diameter gradually increases downward. This is because when the rotational speed of the floor cleaning pad unit 5 is high, the cleaning water supplied to the inner region 55 overflows upward along the inner peripheral surface of the circumferential wall 35 by the action of centrifugal force. It is because it tries to do so. In order to form the inner peripheral surface of the circumferential wall 35 so as to incline so that the inner diameter gradually increases downward, for example, the mold for injection molding is molded even in a so-called undercut state, and the mold is opened. A structure of a slide core that can be formed may be used, and even with a slight undercut, a structure in which the core is forcibly removed at the initial stage of molding can be used. Alternatively, it is not so difficult to taper the inner peripheral surface of the circumferential wall 35 by machining after injection molding. If the rotational speed at the time of cleaning the floor surface cleaning pad unit 5 is suppressed from a medium speed to a low speed, the circumferential wall 35 is at least as large as a normal die-cut taper with an inner diameter not greatly expanding upward. You may have a slope. A slide hole 37 is formed in the circumferential wall 35 along the radial direction, and a notch 38 is formed in an arc shape on the opposite side of the slide hole 37.

  On the inner circumferential surface of the circumferential wall 35, a receiving portion 40 is formed horizontally from the substantially middle position of the circumferential wall 35 toward the inside. The receiving portion 40 has an annular shape, and the inner end portion of the receiving portion 40 is bent downward, and the lower end of the bent portion is formed at the same height as the lower end of the spigot portion 34. In this case, it is desirable that the difference in height between the upper end of the circumferential wall 35 and the receiving portion 40 is as large as possible, including the portion where the notch 38 is formed. Further, six drain outlets 41 are formed at equal intervals in the circumferential direction so as to be in contact with the inner peripheral surface of the circumferential wall 35 on the outer peripheral portion of the receiving portion 40.

  The fixture 28 is formed of a metal member. The fixture 28 is formed with a bottomed cylindrical boss 42 at the center, and the boss 42 is formed with an upward recess 43 into which the sleeve 20 can be inserted and removed. The inner diameter of the boss 42 is set to be slightly larger than the outer diameter of the sleeve 20, and there is some play between the outer peripheral surface of the sleeve 20 and the inner peripheral surface of the boss 42. Claw portions 44 project radially from the inner peripheral surface of the boss 42. A large number of claw portions 44 of the boss 42 are formed at equal intervals on the circumference of the inner peripheral surface of the boss 42. The claw portion 44 of the boss 42 and the claw portion 23 of the sleeve 20 mesh with each other, so that the relative rotation of the boss 42 with respect to the sleeve 20 is restricted, and the rotation of the rotating shaft 19 of the motor causes the sleeve 20 and the boss 42 to move. Via the floor cleaning pad unit 5. Each claw portion 44 of the boss 42 may have a shape that is long in the vertical direction, and the upper end portion (sleeve side end portion) of each claw portion 44 may have a tapered shape. Further, a drain hole or the like may be perforated at the bottom of the bottomed cylindrical boss 42 at the center of the fixture 28.

  A flange 45 is formed on the outer periphery of the boss 42 in the fixture 28. The flange portion 45 is formed so as to be able to be placed on the receiving portion 40 of the pad mounting body 27 with a gap corresponding to the drain port 41 between the inner peripheral surface 39 of the circumferential wall 35. In the outer peripheral portion of the flange portion 45, six cut portions 46 are formed at equal intervals in the circumferential direction, and the attachment tool 28 is padded by attaching screws or the like to the receiving portion 40 through these cut portions 46. It is fixed to the mounting body 27.

  A guide wall 47 is formed on the fixture 28 concentrically with the circumferential wall 35 above the boss 42. The guide wall 47 has a semicircular shape in plan view so as to cover the outer periphery of the sleeve 20 inserted into the recess 43 about a half circumference, and a slide hole 48 is formed at a position corresponding to the slide hole 37 of the circumferential wall 35. An opening 49 is formed in an arc shape at a position corresponding to the notch 38 of the circumferential wall 35. In this case, the difference in height between the upper end of the guide wall 47 and the receiving portion 40 is desirably as large as possible including the portion where the opening 49 is formed.

  A locking key 50 as a locking means is inserted through the slide hole 37 of the circumferential wall 35 and the slide hole 48 of the guide wall 47 in the radial direction centering on the boss 42. The locking key 50 is provided at a height corresponding to the groove portion 24 of the sleeve 20 in a state where the claw portion 23 of the sleeve 20 and the claw portion 44 of the boss 42 are engaged with each other. A claw piece 51 is provided at the inner end of the locking key 50, and the inner surface of the claw piece 51 is inclined slightly outwardly upward. At the outer end of the locking key 50, a handle portion 52 for advancing and retracting the locking key 50 is provided.

  The locking key 50 is provided so as to be able to advance and retreat with respect to the concave portion 43 of the boss 42, and the claw piece 51 of the locking key 50 is engaged with the claw portion 23 of the sleeve 20 and the claw portion 44 of the boss 42. Is inserted into the recess 43, the claw piece 51 of the locking key 50 is locked in the groove 24, and the sleeve 20 and the boss 42 cannot be separated. On the other hand, when the claw piece 51 of the locking key 50 is retracted from the recess 43, the locking state of the claw piece 51 of the locking key 50 with respect to the groove portion 24 is released, and the sleeve 20 and the boss 42 can be separated. A compression spring 53 is interposed between the fixture 28 and the circumferential wall 35 in the locking key 50. The compression spring 53 urges the locking key 50 inward and acts so that the claw piece 51 of the locking key 50 enters the groove portion 24 of the sleeve 20. Then, the handle portion 52 is slid so that the claw piece 51 is retracted from the groove portion 24 of the sleeve 20 against the urging force of the compression spring 53, or conversely, the claw piece 51 is caused to enter the groove portion 24. It has become. A groove 54 (see FIG. 5) as a mark is formed on the extended line of the handle portion 52 on the outer peripheral portion of the pad mounting body 27 of the floor cleaning pad unit 5. Thereby, it is comprised so that position alignment of the nail | claw part 23 of the sleeve 20 is possible. Further, as shown in FIG. 7, the locking key 50 is formed with a flat portion 56 on the upper portion of the portion passing through the inner region 55 surrounded by the circumferential wall 35.

  As shown in FIGS. 1 and 2, the front cover 6 is a cover that is provided so as to be rotatable up and down about a cover shaft 57 (see FIG. 3) fixed to the main body chassis 12 in front of the motor 3. A connecting portion 58; a pad cover portion 59 formed to cover the upper and outer peripheral portions of the floor cleaning pad unit 5; and a cover lid 60 formed to be openable and closable on the upper surface of the pad cover portion 59. Yes. The cover connecting portion 58 and the pad cover portion 59 are integrally formed. When the front cover 6 is rotated upward with the cover shaft 5 as a fulcrum, the floor cleaning pad unit 5 is placed on the floor at the front bottom of the main body 2. A space 80 (see FIG. 10B) for sliding along 4 is formed.

  As shown in FIG. 3, the lifting device 7 includes a cylinder 61 supported on the upper surface of the main body chassis 12, and a rod 62 that protrudes downward from the cylinder 61. A lift shaft 63 is connected to the lower end of the rod 62, and a lift plate (not shown) protruding from the motor base 17 is supported on the lift shaft 63. When the cylinder 61 is operated to raise the rod 62, the lift shaft 63 connected to the rod 62 lifts the lift plate, and accordingly, the motor base 17 and the motor 3 are raised. . Further, when the cylinder 61 is operated to lower the rod 62, the lifting of the lift plate by the lift shaft 63 connected to the rod 62 is released, and the motor base 17 and the motor 3 are lowered by their own weight. .

  One end of an operating arm 64 is attached to the lift shaft 63, and the other end of the operating arm 64 is pivotally supported by a bracket 66 via an attachment shaft 65. A traction spring 67 is stretched between the operating arm 64 and the connecting plate 16. When the cylinder 61 is operated to lower the rod 62, the operating arm 64 rotates in one direction about the mounting shaft 65, and the operating arm 64 pulls the connecting plate 16 downward via the pulling spring 67. It is configured as follows. Then, the motor base 17 is lowered with this pulling, and the cleaning pad 25 of the floor cleaning pad unit 5 is configured to be pressed against the floor surface.

  A water supply means is connected to the fresh water tank 8, and as shown in FIGS. 3 and 4, the water supply means includes a water supply pump, a water supply pipe (not shown), and a water supply nozzle attached to the tip of the water supply pipe. 68. Since the water supply nozzle 68 is fixed to the main body chassis 12, regardless of the operation of the cylinder 61 during the replacement work of the cleaning pad 25, the water supply nozzle 68 has an accuracy in the inner region 55 surrounded by the circumferential wall 35 of the floor cleaning pad unit 5. Well positioned. Thereby, the wash water stored in the fresh water tank 8 is reliably supplied to the inner region 55 through the water supply nozzle 68.

  As shown in FIG. 1, the squeegee 9 is provided with a suction port 69 at the center in the left-right direction, and this suction port 69 communicates with the inside of the collection tank 10 via a suction hose 70. Yes. Then, the sewage sucked from the suction port 69 through the suction hose 70 by operating the suction blower (not shown) can be introduced into the recovery tank 10.

  In the vicinity of the handle 11, an operation unit 71 is provided on the upper rear side of the main body 2. The operation unit 71 is provided with various switches such as an operation switch, a main switch, a pad pressure changeover switch for performing a cleaning operation, and a display unit for displaying a battery remaining amount display and an error display. The main switch of the operation unit can be switched among a power ON mode, a power OFF mode, and a pad replacement mode (floor cleaning pad unit replacement mode). When the main switch is switched from the power ON mode or the power OFF mode to the pad replacement mode, the cylinder 61 is operated and the rod 62 is lowered, and the sleeve 20 is lowered to the lowest position (the tip of the sleeve 20 is the boss 42). The position reaches the lowest end of the recess 43). Further, when the main switch is switched from the pad replacement mode to the power ON mode or the power OFF mode, the cylinder 61 is operated to raise the rod 62 and the sleeve 20 is at the highest position (the lower end of the sleeve 20 is the opening of the guide wall 47). It rises to a position slightly higher than 49).

  Next, a method for cleaning the floor surface 4 by the floor surface cleaning machine 1 having the above-described configuration will be described with reference mainly to FIGS. 8 and 9.

  First, the floor cleaning machine 1 is turned on, and the operator pushes or pulls the handle 11 of the floor cleaning machine 1 to run. At the same time, the cleaning water stored in the clean water tank 8 is mixed with a detergent or the like as appropriate, and then supplied into the inner region 55 of the floor cleaning pad unit 5 through the water supply nozzle 68. Since the cleaning water supplied into the inner region 55 is dropped onto the floor surface 4 through the drain port 41, the floor surface 4 is cleaned by rotating the floor surface cleaning pad unit 5 at high speed by the motor 3. be able to.

  Thereafter, the sewage generated by washing the floor surface 4 is collected in the center by the squeegee 9 located on the rear side of the main body, and is collected by suction through the suction port 69 through the suction hose 70 and stored in the collection tank 10. The

  In this case, even if the cleaning water supplied to the inner region 55 bounces off at the receiving portion 40 or the like, it can be prevented from being scattered by the circumferential wall 35 onto the upper surface of the pad mounting body 27 or the like. Further, since the flat portion 56 is formed on the upper portion of the locking key 50, even if the cleaning water is dropped on the upper portion 56 of the locking key 50, the cleaning water is related as shown in FIG. As shown in FIG. 9 (b), the inner region 55 moves along the rotational direction of the floor cleaning pad unit 5 without being bounced to the top of the stop key and scattered outside the circumferential wall 35. Fall into. Therefore, even if a splash guard is not provided for preventing splashing of the cleaning water, the cleaning water before dripping onto the floor surface 4 by the centrifugal force due to the rotation of the floor surface cleaning pad unit 5 is around the floor surface cleaning pad unit 5. There is no scattering. Therefore, the wash water can be used efficiently and water saving can be achieved.

  Moreover, since the range from the height separated from the lower surface of the pad attachment body 27 to the inner peripheral surface of the hook-and-loop fastener 26 is covered by the inlay portion 34, the portion where the hook-and-loop fastener 26 is attached to the pad attachment body 27 is washed water. The pad attachment body 27 and the hook-and-loop fastener 26 can be stably adhered.

  Furthermore, the floor cleaning pad unit 5 can secure a predetermined strength by forming the fixture 28 to which rotational torque is applied from a metal member, and the circumferential wall 35 and the spigot portion 34 can be connected to the pad attachment body 27. By integrally molding the resin, the cost can be reduced without increasing the weight of the pad mounting body 27.

  Next, a procedure for replacing the floor cleaning pad unit 5 in the floor cleaning machine 1 having the above-described configuration will be described with reference mainly to FIGS. 10 (a) and 10 (b).

  First, when the operation of the floor cleaning machine 1 is stopped by switching the main switch of the operation unit 71 from the power ON mode to the power OFF mode, the floor cleaning pad unit 5 rotates as shown in FIG. Is stopped, the cylinder 61 is driven, the rod 62 is raised, and the sleeve 20 is raised to the raised position. When the cover cover 60 of the pad cover portion 59 is opened in this state, the state of the floor cleaning pad unit 5 can be visually recognized. Therefore, the operator grasps the handle portion 52 of the locking key 50 and pulls it forward. Slide forward.

  10B, the claw piece 51 of the locking key 50 is retracted from the groove 24 of the sleeve 20, and the sleeve 20 and the boss 42 are separated, together with the fixture 28, the floor cleaning pad unit. 5 falls off to the floor surface 4 by its own weight. Therefore, when the main switch is switched to the pad replacement mode, the sleeve 20 is raised to the highest position, and accordingly, the front cover 6 is rotated upward with the cover shaft 57 as a fulcrum by the raising operation of the operating arm 64 described above. Thus, the dropped floor surface cleaning pad unit 5 can be slid forward along the floor surface 4 through the space 80 and pulled out to the outside. Thereby, the removal work of the floor surface cleaning pad unit 5 is completed.

  Next, the used cleaning pad 25 is removed from the pad mounting body 27, and a new cleaning pad 25 for replacement is mounted on the same pad mounting body 27. Then, the floor surface cleaning pad unit 5 is slid rearward along the floor surface 4 from the front of the main body 2 through the space 80 to below the rotating shaft 19 of the motor 3 inside the main body 2, and the claw portion of the sleeve 20. 23, the guide wall 47 of the boss 42 is brought into contact with the boss 42, and the boss 42 and the sleeve 20 are aligned.

  Next, when the main switch of the operation unit 71 is switched from the pad replacement mode to power ON or OFF, the cylinder 61 is driven, the rod 62 is lowered, and the sleeve 20 is lowered to the lowest position. Then, the claw portion 23 of the sleeve 20 and the claw portion 44 of the boss 42 are engaged with each other, and the claw piece 51 of the locking key 50 is engaged with the groove portion 24 of the sleeve 20, so that the rotating shaft 19 of the motor 3 and the floor cleaning pad are engaged. Units 5 are connected. Thereby, the installation work of the floor surface cleaning pad unit 5 provided with the new cleaning pad 25 is completed. When the main switch is turned off, the sleeve 20 immediately rises to the raised position, and as a result, the cleaning pad 25 stops in a state of being separated from the floor surface 4 (the state shown in FIG. 10A). ).

  In this case, since it is not necessary to provide a splash guard for preventing splashing of cleaning water, a space for opening the splash guard when replacing the cleaning pad 25 is not necessary, and the front cover 6 is at the highest position of the sleeve 20. Since the front automatically rises to form a replacement space 80, it is not necessary to open and close the splash guard, and the floor surface cleaning pad unit 5 can be easily replaced.

  Next, a floor cleaning machine according to another embodiment of the present invention will be described with reference to FIGS. 11 and 12. In addition, in the following description, detailed description is abbreviate | omitted about the structure equivalent to the floor cleaning machine 1 which concerns on above-described embodiment.

  As shown in FIG. 11, the floor cleaning pad unit 81 of the floor cleaning machine 1 according to this embodiment is detachably joined to the cleaning pad 25 and the upper surface of the cleaning pad 25 via a surface fastener 26. The pad mounting body 82 and the mounting tool 83 that connects the sleeve 20 and the pad mounting body 82 are provided.

  The pad mounting body 82 is integrally formed of a resin member and has an annular shape. The inner peripheral portion 84 of the pad mounting body 82 is formed so as to protrude inward from the inner peripheral surface 33 of the cleaning pad 25. The inner peripheral portion 84 of the pad mounting body 82 has an inlay portion 78 extending downward so as to be fitted to the inner peripheral surface 33 of the cleaning pad 25, and so as to surround the mounting tool 82. A peripheral wall 85 is erected. The circumferential wall 85 is preferably formed on the upper extension line of the spigot part 78, and the inner circumferential surface of the circumferential wall 85 is preferably formed to be inclined so that the inner diameter gradually increases downward, but at least above As long as the inner diameter does not increase greatly toward the center, the inclination may be as long as a normal die-cut taper.

  A receiving portion 87 is formed horizontally on the inner peripheral portion 84 of the pad mounting body 82 from the boundary portion between the circumferential wall 84 and the spigot portion 78 toward the inside. In this case, the difference in height between the upper end of the circumferential wall 85 and the receiving portion 87 is desirably as large as possible. Further, six drain outlets 89 are formed at equal intervals in the circumferential direction so as to be in contact with the inner peripheral surface of the circumferential wall 85 on the outer peripheral portion of the receiving portion 87.

  The fixture 83 is formed of a metal member. The fixture 83 is formed with a bottomed cylindrical boss 90 at the center, and the boss 90 is formed with an upward recess 91 into which the sleeve 20 can be inserted and removed. A number of claw portions 92 project radially from the inner peripheral surface of the boss 90, and the claw portions 92 of the boss 90 and the claw portions 23 of the sleeve 20 mesh with each other, whereby the boss 90 rotates relative to the sleeve 20. The rotation of the sleeve 20 is transmitted to the floor cleaning pad unit 81 via the boss 90. Further, a drain hole or the like may be drilled in the bottom of the bottomed cylindrical boss 90 at the center of the fixture 83.

  A flange portion 93 is formed on the outer periphery of the boss 90 in the fixture 83. The flange portion 93 is formed so as to be able to be placed on the receiving portion 87 of the pad mounting body 82 with a gap corresponding to the drainage port 89 between the circumferential wall 85.

  A guide wall 94 is formed on the fixture 83 concentrically with the circumferential wall 85 above the boss 90. The guide wall 94 has a semicircular shape in plan view so as to cover the outer periphery of the sleeve 20 inserted into the recess 91 about a half circumference, and an engagement hole 95 is formed at the center position in the circumferential direction of the guide wall 94. An opening 96 is formed in an arc shape on the opposite side of the engagement hole 95. In this case, the difference in height between the upper end of the guide wall 94 and the receiving portion 87 is desirably as large as possible including the portion where the opening 96 is formed.

  A locking lever 97 as a locking means is engaged with the engagement hole 95 of the guide wall 94. The locking lever 97 is engaged with a lower end portion pivotally supported with respect to the boss 90, an upper end portion 99 formed by bending forward, and projecting rearward from the upper and lower intermediate portions. And a claw piece 100 that engages with the hole 95. The locking lever 97 is provided so as to be able to advance and retreat with respect to the groove portion 24 of the sleeve 20. The claw piece 100 of the locking lever 97 is engaged with the claw portion 23 of the sleeve 20 and the claw portion 92 of the boss 90. When entering the groove portion 24, the sleeve 20 and the boss 90 cannot be separated. On the other hand, when the claw piece 100 of the locking lever 97 is retracted from the groove 24, the sleeve 20 and the boss 90 can be separated. Although not shown, a torsion spring is wound around the lower end portion of the locking lever 97 and biases the claw piece 100 of the locking lever 97 to enter the engagement hole 95.

  When the floor surface 4 is cleaned by the floor cleaning machine having the above-described configuration, the cleaning water supplied into the inner region 101 of the floor surface cleaning pad unit 81 through the water supply nozzle 68 passes through the drain port 89. Therefore, the floor surface 4 can be cleaned by rotating the floor surface cleaning pad unit 81 at a high speed.

  In this case, even if the cleaning water supplied to the inner region 101 bounces off at the receiving portion 87 or the like, it is possible to prevent the circumferential wall 84 from scattering onto the upper surface of the pad attachment body 82 or the like. Therefore, even if a splash guard is not provided for preventing splashing of cleaning water, the cleaning water before dripping onto the floor surface 4 due to the centrifugal force due to the rotation of the floor surface cleaning pad unit 81 is placed around the floor surface cleaning pad unit 81. There is no scattering. Therefore, the wash water can be used efficiently and water saving can be achieved. In addition, since the inlay portion 78 can prevent the portion where the surface fastener 26 is attached to the pad attachment body 27 from being immersed in the cleaning water, the attachment state of the pad attachment body 27 and the surface fastener 26 is stabilized. Can be maintained. Further, the locking lever 97 is pivotally supported by the boss 90, and the receiving portion 87 is formed from the lowest possible position per boundary portion between the circumferential wall 84 and the spigot portion 78, thereby preventing the washing water from being scattered. The thickness of the surface cleaning pad unit 81 can be reduced overall. In addition, there is no portion corresponding to the cutout portion 38 formed in the arc shape in the previous embodiment, and the upper end portion of the circumferential wall 84 has a complete cylindrical shape. It is not easy to overflow.

  Next, a procedure for replacing the cleaning pad 25 in the floor cleaning machine having the above-described configuration will be described mainly with reference to FIGS. 12 (a) and 12 (b).

  First, as shown in FIG. 12 (a), after the rotation of the floor cleaning pad unit 81 is stopped by a predetermined operation, the cover lid 60 of the cover connecting portion 58 is in a state where the sleeve 20 is raised to the highest position. Is opened, the state of the floor cleaning pad unit 81 can be visually confirmed, and the groove as a mark can also be visually recognized from the outside of the pad cover part 59. Therefore, after the operator adjusts the phase of the floor cleaning pad unit 81, The upper end 99 of the locking lever 97 is grasped and tilted downward.

  As a result, as shown in FIG. 12B, the claw piece 100 of the locking lever 97 is retracted from the groove portion 24 of the sleeve 20, so that the sleeve 20 and the boss 90 are separated, and the floor cleaning pad unit together with the fixture 83. 81 falls to the floor surface 4 due to its own weight. Therefore, when the main switch of the operation unit 71 is switched to the pad replacement mode, the sleeve 20 is raised to the highest position, and accordingly, the front cover 6 uses the cover shaft 57 as a fulcrum by the raising operation of the operating arm 64 described above. The floor cleaning pad unit 81 that has been dropped and slid down is slid forward along the floor surface 4 through the space 80 and pulled out to complete the removal operation of the floor cleaning pad unit 81. .

  Next, the used cleaning pad 25 is removed from the pad mounting body 82, and a new cleaning pad 25 for replacement is mounted on the same pad mounting body 82. Then, the floor cleaning pad unit 82 is slid rearward along the floor surface 4 through the space 80, the guide wall 94 of the boss 90 is brought into contact with the claw portion 23 of the sleeve 20, and the positions of the boss 90 and the sleeve 20 are positioned. Align.

  Next, when the sleeve 20 is lowered to the lowest position by a predetermined operation, the claw portion 23 of the sleeve 20 and the claw portion 92 of the boss 90 are engaged with each other, and the claw piece 100 of the locking lever 97 is engaged with the groove portion 24 of the sleeve 20. And the installation work of the floor cleaning pad unit 81 having the new cleaning pad 25 is completed.

  In this case, it is not necessary to provide a splash guard for preventing splashing of the cleaning water, so that a space for opening the splash guard when replacing the cleaning pad 25 is not required, and it is not necessary to open and close the splash guard. Further, by reducing the thickness of the floor cleaning pad unit 81 as described above, the floor cleaning pad unit 81 can be removed and removed even when the rising height of the sleeve 20 is lowered when the cleaning pad 25 is replaced. It is possible to perform the attachment work, and it is possible to reduce the thickness and simplify the structure of the floor cleaning machine 1 itself. Furthermore, since the locking lever 97 can be easily operated and the operability can be enhanced, the floor surface cleaning pad unit 81 can be removed and attached more simply.

  Next, a floor cleaning machine according to still another embodiment of the present invention will be described with reference to FIGS. 13 and 14. In addition, in the following description, detailed description is abbreviate | omitted about the structure equivalent to the floor cleaning machine 1 which concerns on above-described embodiment.

  As shown in FIG. 13, the floor cleaning pad unit 111 of the floor cleaning machine according to this embodiment is detachably joined to the cleaning pad 25 and the upper surface of the cleaning pad 25 via a surface fastener 26. And a mounting tool 113 that connects the sleeve 20 and the pad mounting body 112 to each other.

  The pad attachment body 112 is integrally formed of a resin member and has an annular shape. A circumferential wall 115 is erected on the inner peripheral portion of the pad mounting body 112 so as to surround the mounting tool 113. The inner peripheral surface of the circumferential wall 115 is formed to be inclined so that the inner diameter gradually increases downward. A receiving recess 117 is formed below the circumferential wall 115, and an inlay portion 118 is formed outside the receiving recess 117. The inlay portion 118 extends downward so as to be fitted to the inner peripheral surface 33 of the cleaning pad 25.

  The fixture 113 is formed of a metal member. The fixture 113 is formed with a bottomed cylindrical boss 119 at the center, and the boss 119 is formed with an upward recess 120 into which the sleeve 20 can be inserted and removed. On the inner peripheral surface of the boss 119, a large number of claw portions 121 project radially, and the claw portions 121 of the boss 119 and the claw portions 23 of the sleeve 20 mesh with each other, whereby the boss 119 rotates relative to the sleeve 20. The rotation of the sleeve 20 is transmitted to the floor cleaning pad unit 111 via the boss 119. Further, a drain hole or the like may be perforated at the bottom of the bottomed cylindrical boss 119 at the center of the fixture 113.

  A flange portion 120 is formed on the outer peripheral portion of the mounting tool 113 so as to be fitted to the receiving recess 117 from below. The fitting 113 is fixed to the pad attachment body 112 by fitting the flange portion 120 into the concave portion 117 from below and screwing the screw 129. Six drain outlets 121 are formed at equal intervals in the circumferential direction on the inner side of the receiving recess 117 of the flange portion 120. In this case, the difference in height between the upper end of the circumferential wall 115 and the drain port 121 is desirably as large as possible.

  A guide wall 122 is formed on the fixture 113 concentrically with the circumferential wall 115 above the boss 119. The guide wall 122 has a semicircular shape in plan view so as to cover the outer periphery of the sleeve 20 inserted into the recess 120 about a half circumference, and an engagement hole 123 is formed at the center of the guide wall 112 in the circumferential direction. An opening 124 is formed in an arc shape on the opposite side of the engagement hole 123. In this case, it is desirable that the difference in height between the upper end of the guide wall 122 and the drain port 121 is as large as possible including the portion where the opening 124 is formed.

  A locking lever 125 as a locking means is engaged with the engagement hole 123 of the guide wall 122. The locking lever 125 includes a lower end 126 that is pivotally supported with respect to the boss 119 so as to be able to swing back and forth, an upper end 127 that is formed by bending forward, and a rearward projecting from the upper and lower intermediate portions. And a claw piece 128 that engages with the joint hole 123. The locking lever 125 is provided so as to be able to advance and retract with respect to the groove portion 24 of the sleeve 20. The claw piece 128 of the locking lever 125 is engaged with the claw portion 23 of the sleeve 20 and the claw portion 121 of the boss 119. When entering the groove portion of the sleeve 20, the sleeve 20 and the boss 119 cannot be separated. On the other hand, when the claw piece 128 of the locking lever 125 is retracted from the groove, the sleeve 20 and the boss 119 can be separated. Note that a torsion spring is wound around the lower end portion 126 of the locking lever 125 and urges the claw piece 128 of the locking lever 125 to enter the engagement hole 123.

  When the floor surface 4 is cleaned by the floor cleaning machine having the above-described configuration, it is supplied into the inner region 129 of the floor surface cleaning pad unit 111 via the water supply nozzle 68 as shown in FIG. Since the washed water is dropped onto the floor surface 4 through the drain port 121, the floor surface 4 can be washed by rotating the floor surface washing pad unit 111 at a high speed.

  In this case, even if the cleaning water supplied to the inner region 129 bounces around the drain port 121, it can be prevented that the circumferential wall 115 scatters on the upper surface of the pad attachment body 112. Therefore, even if a splash guard is not provided for preventing splashing of cleaning water, the cleaning water before dripping onto the floor surface 4 due to the centrifugal force caused by the rotation of the floor surface cleaning pad unit 111 is placed around the floor surface cleaning pad unit 111. There is no scattering. Therefore, the wash water can be used efficiently and water saving can be achieved. Further, since the inlay portion 118 can prevent the portion where the surface fastener 26 is attached to the pad attachment body 112 from being immersed in the cleaning water, the attachment state of the pad attachment body 27 and the surface fastener 26 is stabilized. Can be maintained. Further, the locking lever 125 is pivotally supported by the boss 119, and the drainage port 121 is formed as low as possible, thereby preventing the cleaning water from splashing and reducing the thickness of the floor cleaning pad unit 111 as a whole. can do.

  In the floor cleaning machine having the above-described configuration, the procedure for replacing the cleaning pad 25 is the same as that of the floor cleaning machine 1 according to the above-described embodiment, and thus the description thereof is omitted.

  In the floor cleaning machine according to the above-described embodiment, the inner peripheral surface of the circumferential wall 115 has a shape opened downward, and the receiving recess 117 is formed below the circumferential wall 115, and the floor Since the surface cleaning pad unit 111 has a shape that is easy to be pulled out downward with a mold, it can be easily manufactured. Further, since the inner peripheral surface of the circumferential wall 115 is inclined so that the inner diameter gradually increases downward, the cleaning water is scattered by the circumferential wall 84 on the upper surface of the pad mounting body 112 and the like. It can prevent more reliably. Therefore, even if the floor cleaning pad unit 111 is rotated at a considerably high speed, the cleaning water is not scattered or blown out around the floor cleaning pad unit 111 due to the centrifugal force of the rotation, and the cleaning water is efficiently supplied. It can be used for cleaning the floor surface 4. In addition, the inner diameter of the hook-and-loop fastener 26 is set to an inner diameter larger than the inner diameters of the inlay portion 118 and the cleaning pad 25 without being fitted into the inlay portion 118. This is because by providing a gap between the inner diameter of the inlay portion 118 and the hook-and-loop fastener 26, it is possible to minimize the contact of the cleaning water with the surface of the hook-and-loop fastener 26 and the pad attachment body 112, so The pasted state is kept stable. Further, the cleaning pad 25 described in the embodiment of the present invention does not necessarily have an annular shape. A case where a plurality of fan-shaped cleaning pads obtained by dividing the annular cleaning pad 25 in the circumferential direction is mounted as an application of the present invention. Furthermore, in addition to the cleaning pad 25 made of nonwoven fabric or compressed melamine foam, the technique of the present invention is applied when used in an apparatus for processing other than floor surface cleaning using pads or sponges of various materials. It is also possible.

  In addition, since description of embodiment of this invention mentioned above has demonstrated the preferred embodiment in the floor-cleaning machine which concerns on this invention, it may attach various technically preferable restrictions. However, the technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention. That is, the present invention can be appropriately changed without departing from the spirit or concept of the invention that can be read from the claims and the entire specification, and the floor cleaning machine and the floor cleaning pad unit with such a change Is also included in the technical idea of the present invention.

The technology of the present invention can be suitably used for a commercial walk-and-push floor cleaning machine, an automatic traveling floor cleaning machine, an automatic traveling floor cleaning robot, and the like.

DESCRIPTION OF SYMBOLS 1 Floor surface washing machine 3 Motor 4 Floor surface 5 Floor surface washing pad unit 19 Rotating shaft (of motor) 20 Sleeve 24 Groove part (locked part)
25 Cleaning Pad 26 Surface Fastener 27 Pad Mounting Body 28 Mounting Tool 30 Pad Mounting Body Side Communication Hole (Engagement Section)
34 Inlay portion 35 Circumferential wall 26 Sleeve 41 Drainage port 43 Concave portion 45 Flange portion 50 Locking key (locking means)
55 Inner area 56 Plane portion 68 Water supply nozzle (water supply means)
83 Fixing tool 85 Circumferential wall 87 Receiving part 89 Drain port 93 Flange part 97 Locking lever (locking means)
112 Pad mounting body 113 Mounting tool 117 Receiving recessed part 120 Flange part 121 Drain outlet 125 Locking lever (locking means)

Claims (7)

A floor cleaning machine for cleaning a floor surface by bringing a cleaning pad rotated by a motor into contact with the floor surface,
The cleaning pad is attached to the lower surface, and an annular pad mounting body having an engagement portion opened in the center,
An attachment that is attached to the engagement portion of the pad attachment and transmits the rotation of the motor to the pad attachment;
A circumferential wall erected on the upper surface side of the pad mounting body so as to surround the mounting tool;
Water supply means for supplying cleaning water to the inner region surrounded by the circumferential wall;
A drain outlet that is formed at a position lower than the upper end of the circumferential wall in the inner region, and allows the washing water supplied from the water supply means to pass through and dripping onto the floor surface;
A floor cleaning machine characterized by comprising:   The floor cleaning machine according to claim 1, wherein the inner peripheral surface of the circumferential wall is formed to be inclined so that the inner diameter gradually increases downward. An inlay portion extending on the lower surface side of the pad mounting body so as to be fitted to the inner peripheral surface of the cleaning pad;
The cleaning pad is attached via a hook-and-loop fastener attached to the lower surface of the pad mounting body,
The floor cleaning machine according to claim 1 or 2, wherein the inlay portion is formed so as to cover at least a range from a height separated from a lower surface of the cleaning pad to the hook-and-loop fastener.   The floor cleaning machine according to claim 3, wherein the spigot part and the circumferential wall are integrally molded with the pad attachment body, and the attachment is made of a metal member. A sleeve attached to a rotating shaft extending downward from the motor and further provided with a locked portion on the outer peripheral side surface,
The fixture includes a recess that can receive the sleeve, and a latch that prevents the sleeve from being separated from the recess by being laterally locked to the locked portion while the sleeve is received in the recess. And stopping means,
The floor cleaning machine according to any one of claims 1 to 4, wherein a flat portion is formed on an upper portion of a portion of the locking means that passes through an inner region of the circumferential wall. .   A receiving portion is formed on the inner side from the inner peripheral surface of the circumferential wall, and a flange portion that can be fixed to the receiving portion from above with a gap between the circumferential wall and the outer peripheral portion of the fixture is formed. The floor cleaning machine according to any one of claims 1 to 5, wherein the drain port is formed in a portion of the receiving portion corresponding to the gap. A receiving recess is formed in the lower part of the inner peripheral surface of the pad mounting body, a flange portion that can be fixed to the receiving recess from below is formed in the outer peripheral portion of the mounting tool, and the receiving recess is formed in the flange portion. The floor cleaning machine according to any one of claims 1 to 5, wherein the drain outlet is formed on the inner side of the portion corresponding to.

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