Rotary machine and apparatus using the same

Abstract

To prevent powder dust generated due to rotation of an instrument involved in machining work from diffusing.SOLUTION: A fan storage part 100 is erected at a position opposed to an output shaft of a motor 2 supported so that an axial direction thereof is along a horizontal direction. A shaft hole is formed at a place positionally shifted to a side closer to a front side than a center position of a bulkhead part 6 erected between the fan storage part 100 and a storage part 101 of the motor 2, and a notched part 70 as an exhaust hole is formed at a back face part of an extending part 7 extending from the bulkhead part 6 to form a space where a centrifugal fan 4 is put. A shaft hole is also formed at a place opposed to a shaft hole of a fan cover mounted on an opening surface of the extending part 7, and an air intake hole is formed at the other place. A driving shaft 5 having a length enough to penetrate through the fan storage part 100 is connected to the motor 2. The centrifugal fan 4 is mounted on a range between the bulkhead part 6 of the driving shaft 5 inserted into the shaft holes and the fan cover, and an instrument involved in machining work is mounted on a portion protruding from the fan cover of the driving shaft 5.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a rotating machine that rotatably supports implements related to machining operations (implements (tools) used in machining operations, and implements for cleaning tools or parts to be machined or items produced by machining operations), and to a cleaning or machining device that uses the rotating machine. [Background technology]

[0002] There are many known examples of machines and implements that process or clean objects by rotating and contacting the objects. The following four patent documents have been selected from these examples and their disclosures are briefly explained below.

[0003] Patent Document 1 discloses a cutting tool in which the outer peripheral surface and one end surface of a rod-shaped body having a shape close to a cylinder are grinding surfaces to which hard particles are brazed, and the other end is connected to the rotating shaft of a rotary drive device of an electric grinder. This cutting tool is used for surface preparation treatment to remove rust, etc.

[0004] Patent Document 2 discloses a tool having a grinding tip with a hard cutting edge provided on the peripheral portion of the circular surface of a flat, disk-shaped cutter body, and an attachment shaft for attaching to the rotary drive shaft of a disk grinder provided in the center of the surface opposite to the grinding tip. This tool is used in a process for removing old coating film applied to the surface of a metal structure and polishing the underlying metal surface.

[0005] Patent Document 3 describes a method in which a brush, with bristles attached to a disk having an axis of rotation, is placed above a polishing plate used to polish a glass substrate so that it can move up and down freely, and the brush is lowered while the polishing plate is rotating, causing the tip of the bristles of the brush to slide against the polishing cloth attached to the top surface of the polishing plate, thereby removing clogging of the polishing cloth.

[0006] Patent Document 4 discloses a cleaning tool in which a brush sheet with adhesive and flexible wire brushes is attached detachably to the outer periphery of a roller rotatably attached to a handle. This cleaning tool is used to manually rotate the roller to remove dust from the surface to be cleaned with the brush. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2019-69482 A [Patent Document 2] Patent No. 7336797 [Patent Document 3] JP 2004-268149 A [Patent Document 4] JP 2014-24036 A Summary of the Invention [Problem to be solved by the invention]

[0008] The electrically-rotating tools and devices described in Patent Documents 1 to 3 are used in large-scale manufacturing sites, but individual people who do manual production such as model making are also very interested in electrically-rotating cleaning tools and processing tools, and are likely to want to obtain a machine with such a function if one were available.

[0009] However, when using rotating electric tools to remove clogs or perform grinding work, it is expected that fine debris detached from the target item will turn into dust and spread over a wide area. Since work done by individuals is often done in places where it is undesirable for dust to spread, such as at home, measures to prevent the spread of dust are necessary.

[0010] The present invention is directed to solving the above-mentioned problems, and has an object to prevent the diffusion of dust generated by a tool used in cleaning or processing work while rotating the tool. [Means for solving the problem]

[0011] In view of the above, the present invention provides a rotating machine having a function of rotatably supporting a tool related to a machining operation and a function of sucking air around the tool, the rotating machine including a motor, a centrifugal fan, a motor support member for supporting the motor with its axial direction aligned horizontally, a drive shaft connected to an output shaft of the motor supported by the motor support member, and a fan housing for housing the centrifugal fan.

[0012] The fan accommodating section includes a partition section erected at a position facing the output shaft of the motor, an extension section extending from the partition section to the opposite side of the motor to form a space for the centrifugal fan, and a fan cover connected to the extension section and facing the partition section. A shaft hole for passing a drive shaft is provided at a position shifted in the width direction from the center position of the partition section, and a shaft hole is also provided in the fan cover at a position facing the shaft hole in the partition section. Furthermore, an intake hole is provided at a position other than the shaft hole in the fan cover, and an exhaust hole is provided in a portion of the extension section along the height direction, away from the shaft hole in the opposite direction to the center position of the partition section (a portion forming the rear portion when the direction from the center position toward the shaft hole is defined as the front).

[0013] The drive shaft connected to the output shaft of the motor is passed through the shaft holes in the partition and the fan cover and protrudes from the fan cover. The shaft of the centrifugal fan is attached to the drive shaft in the area between the partition and the fan cover.

[0014] The portion of the drive shaft protruding from the fan cover (hereinafter referred to as the "protruding portion") is fitted with tools related to the above-mentioned machining operation. For example, a rotating drum for cleaning with brush bristles attached to its outer periphery, a rotating drum for grinding with an outer periphery made uneven by abrasive grains, a work support with a gripper for the work to be processed, a disk-shaped cutter with a cutting edge formed on its outer periphery, etc. can be rotatably attached to the protruding portion of the drive shaft.

[0015] In a rotating machine of the above configuration, as the partition portion and the axial hole of the fan cover are misaligned in the width direction relative to the central position, the drive shaft and the axial portion of the centrifugal fan are also similarly misaligned, and an empty area of ​​a predetermined size is formed between the range in the space defined by the extension portion where the centrifugal fan is positioned and the portion where the exhaust hole is provided.

[0016] When the motor rotates, the centrifugal fan and the appliance attached to the drive shaft rotate in the same direction. At this time, in the fan housing, the air around the fan is pressurized and flows in the direction of rotation due to the centrifugal force generated by the rotation of the centrifugal fan. The pressurized air is released from the pressure at the location facing the above-mentioned open space and is released into the open space, and then crosses the open space and is exhausted to the outside through the exhaust hole.

[0017] The air flow creates a negative pressure in the space inside the fan housing, and as a result, air in front of the fan cover is drawn into the fan housing through the intake holes. The drawn air also travels the same path as above before being exhausted through the opening.

[0018] Dust generated by the use of rotating tools also enters the fan housing with the air and is discharged from the opening together with the air to the outside of the fan housing. Therefore, dust generated by cleaning or processing work can be prevented from spreading to the work site by installing a dust collection box on the outside of the exhaust hole or by directing the exhaust air outdoors.

[0019] In the rotating machine, by providing bearings in the shaft holes of the partition and the fan cover, respectively, the drive shaft can be stably supported and smoothly rotated. Also, by removably attaching the fan cover to the extension, it is possible to remove dust adhering to the fan cover and the centrifugal fan, and dust accumulated in the fan housing, as needed.

[0020] Furthermore, in one embodiment of the rotary machine, a pin member is inserted in a position near the axial hole of the partition wall inside the space of the drive shaft in which the centrifugal fan is placed, and in a position near the axial hole of the fan cover outside the space, with the pin member inserted in a direction perpendicular to the axial direction. The pin member inserted in the former position is for supporting the centrifugal fan, and the pin member inserted in the latter position is for supporting a tool attached to the protruding portion of the drive shaft.

[0021] By connecting the pin member to the centrifugal fan and the equipment by means of fitting, welding, adhesive or the like, the centrifugal fan and the equipment can be stably supported at a fixed location on the drive shaft and rotated together with the drive shaft.

[0022] The present invention further provides an apparatus comprising the above-mentioned rotating machine and a rotating drum, the outer circumferential surface of which is provided with brush bristles or an uneven surface formed by abrasive grains.

[0023] A device including a rotating drum with brush bristles attached to its outer periphery can be used to remove clogged files, filters, etc., and to remove dust and debris from other tools, parts to be processed, or finished articles. A device including a rotating drum with abrasive grains on its outer periphery can be used to remove rust, paint, etc., from articles to be processed, to remove burrs, and for finish polishing.

[0024] The present invention further provides an assembly kit for assembling the above-mentioned rotating machine. This assembly kit includes at least the above-mentioned drive shaft, centrifugal fan, fan cover, a plurality of members constituting a main body supporting the motor and centrifugal fan, and a drive unit for the motor. The main body includes a base portion to which a support member for supporting the motor in a horizontal position is connected, and the partition and extension portions configured as described above. The motor and its support members can be included in this assembly kit, but this is not limited thereto. It is also possible to select one of a plurality of sets of motors and support members prepared separately and combine it with the assembly kit to assemble a rotating machine.

[0025] The assembly kit may further include a pair of bearings disposed in the axial holes of the partition and the fan cover. The assembly kit may also include a pair of pin members, and may have pin holes for inserting the pin members formed along a direction perpendicular to the axial direction of the drive shaft at a position adjacent to the axial hole of the partition inside the space of the drive shaft where the centrifugal fan is placed, and at a position adjacent to the axial hole of the fan cover outside the space.

[0026] If a cleaning or processing tool to be attached to the protruding portion of the drive shaft or a kit for assembling the tool is provided separately from the above-mentioned assembly kit, the end user can assemble the intended cleaning or processing device by himself / herself. However, without being limited to this, components of the rotating machine and components of the cleaning or processing tool may be provided together in one kit.

[0027] In either form of kit, the main components are removably connected, so that when it becomes necessary to clean the inside of the rotating machine or replace some of the components, this can be easily done. Effect of the Invention

[0028] According to the present invention, while rotating a cleaning tool or processing tool related to machining work, dust generated by the rotation is sucked into the inside of the fan housing section and discharged from an exhaust opening provided in one place in the fan housing section, and the discharged dust is collected or diffused and directed to a place where it does not cause any problems, thereby preventing dust generated by cleaning or processing work from diffusing into the work site. [Brief description of the drawings]

[0029] [Figure 1] 1 is a perspective view of a cleaning device according to a first embodiment of the present invention, viewed from the left side in a direction in which a cleaning tool can be seen. [Diagram 2] FIG. 2 is a perspective view of the device as viewed from the right side. [Diagram 3] FIG. 2 is a perspective view showing the rear and left side of the device. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] 2A and 2B are a perspective view and a left side view showing the appearance of a rotating machine which is a main part of the above-mentioned device. [Figure 8] 1A and 1B are a perspective view and a left side view of a rotating machine with a fan cover removed; [Figure 9] FIG. 9 is a plan view of the rotary machine in the state shown in FIG. 8. [Figure 10] 2A and 2B are a perspective view and a left side view showing a configuration of a housing main body of the rotating machine. [Figure 11] 4A and 4B are perspective views showing the configuration of the front side and the back side of the fan cover, respectively. [Figure 12] 3A and 3B are perspective views showing the configuration of the front side and the back side of a housing cover, respectively. [Figure 13] This is a three-point perspective view showing the motor, drive shaft, and centrifugal fan configurations and their connection structure. [Figure 14] 3A and 3B are a plan view and a cross-sectional view showing a connection structure between a motor and a drive shaft in a housing main body. [Figure 15] FIG. 2 is a front view of a rotating drum and an enlarged view of a portion thereof. [Figure 16] FIG. 2 is an explanatory diagram showing an example in which the device of the first embodiment is arranged inside a ventilation booth. [Figure 17] FIG. 11 is a perspective view of a cleaning device according to a second embodiment of the present invention, showing a cleaning tool on the left side and a dust box on the rear side. [Figure 18] FIG. 2 is a perspective view of the device as viewed from the right side. [Figure 19] 2A and 2B are a perspective view and a left side view showing the configuration of a housing main body of a rotating machine of the above-mentioned device. [Figure 20] 2 is a perspective view of the housing body, the rear surface of which is visible. FIG. [Figure 21] 3A and 3B are a front view and a rear view of the dust box. [Figure 22] 13 is a cross-sectional view showing air flows in a fan housing portion and a dust box of a rotary machine according to a second embodiment. FIG. [Figure 23] 4A and 4B are a rear view and a perspective view showing air flow in the dust box. [Figure 24] 13 is a perspective view showing an example in which a rectangular plate serving as a connecting member is attached to the bottom surface of the housing main body of the device of the second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] <First Example> Figures 1, 2, and 3 are perspective views of a cleaning device S to which the present invention is applied, each viewed from a different direction. Figures 4, 5, and 6 are front views of one side of the device S. In the following description, the side shown in Figure 4 is the left side, the side shown in Figure 5 is the right side, and the side shown in Figure 6 is the bottom, to represent the front-rear, left-right, and top-bottom relationships of the device S.

[0031] The device S of this embodiment is small enough to be placed in one spot on the top of an office desk, and is composed of a rotating drum D having a brush sheet 210 affixed to the outer peripheral surface of a drum main body 200, and a rotating machine M that supports the rotating drum D for rotation.

[0032] The rotating machine M has a configuration in which a DC motor 2 (hereinafter simply referred to as "motor 2"), a circuit board 3, and a fan 4 are housed inside a rectangular parallelepiped housing with rounded boundaries between the top and front. As will be described later, the fan 4 and the rotating drum D are attached to a drive shaft 5 connected to the output shaft of the motor 2, and both rotate in the same direction in response to the shaft rotation of the motor 2.

[0033] Figures 7(A) and (B) are a perspective view and a left side view of the above-mentioned device S with the rotating drum D removed, showing only the rotating machine M. Figures 8(A) and (B) are a perspective view and a left side view (corresponding to Figures 7(A) and (B)) showing the internal configuration of the rotating machine M, and Figure 9 is a view showing the rotating machine M in the state of Figure 8(A) from above. Figures 10(A) and (B) are a perspective view and a left side view (corresponding to Figures 7 and 8(A) and (B)) showing the configuration of only the housing main body 1 of the rotating machine M.

[0034] The configuration of the rotary machine M will be described in detail with reference to the above-mentioned FIGS. 1 to 10 and subsequent drawings as appropriate.

[0035] The housing of the rotating machine M of this embodiment is formed by combining a housing main body 1 and a housing cover 10. The housing main body 1 is configured such that a fan accommodating section 100 is integrally provided on the left side of a motor accommodating section 101 formed by four walls 110, 120, 130, and 140. The motor accommodating section 101 is open from the top surface to the upper half of the front surface, and the housing cover 10 is attached to the opening.

[0036] The fan accommodating section 100 has as its main elements a partition section 6 which is integral with the left side wall section 140 (shown in Figure 9) of the motor accommodating section 101, an extension section 7 which is connected to the partition section 6 and extends with a certain width in the opposite direction (left side) from the motor accommodating section 101 to form a space for accommodating the fan 4 and has an open left side surface, and a fan cover 8 which is attached to the open side surface of the extension section 7.

[0037] The outer surfaces of the partition wall 6 and the extension portion 7 are integral with each other, and their front and back surfaces are also integral with the front and back surfaces of the motor accommodating portion 101. The top surfaces of the partition wall 6 and the extension portion 7 are higher than the upper end surfaces of the walls 110, 120, 130, and 140 of the motor accommodating portion 101, and by attaching the housing cover 10 to the motor accommodating portion 101, the surface of the housing cover 10 and the top surfaces of the partition wall 6 and the extension portion 7 become flush with each other.

[0038] The left side wall 140 of the motor housing 101 also functions as a part of the partition 6. The partition 6, including the left side wall 140, is provided with a shaft hole 60 for passing the drive shaft 5 therethrough (see FIGS. 10(A) and 10(B)). The shaft hole 60 is offset toward the front side with respect to the center position of the wall surface of the partition 6.

[0039] An inner wall portion 71 including an arc-shaped surface 71a centered on the axial hole 60 of the partition portion 6 is formed on the inside of the range from the top to the bottom of the extension portion 7 via the front portion (see Figs. 8(A)(B) and 10(A)(B)). A protruding piece 72 protruding to the left with a certain width and thickness is integrally formed on the left edge of this inner wall portion 71.

[0040] In addition to the arc-shaped surface 71a, the inner wall portion 71 includes a flat surface 71b that is connected to the lower edge of surface 71a and extends horizontally to the rear portion of the extension portion 7, and a curved surface 71c that is connected to the upper edge of surface 71a and extends to the rear portion of the extension portion 7.

[0041] The arc-shaped surface 71a of the inner wall portion 71 is formed in a range from a predetermined height position rearward and lower than the shaft hole 60 to immediately above the shaft hole 60 so as to surround the fan 4 passed through the drive shaft 5. As the shaft hole 6 through which the drive shaft 5 passes is shifted forward from the center of the partition portion 6, the area in which the fan 4 is disposed is also biased toward the front side in the space formed by the inner wall portion 71 of the extension portion 7, and the space behind it (the space above the flat surface 73c) FS is an empty space (see FIGS. 8(A) and (B)).

[0042] The curved surface 71c is a gently sloping surface close to flat, but the curvature increases toward the rear portion, and the end portion curves along the lower edge of the circular hole 73a at that position. The protruding piece 72 leaves the inner wall portion 71 only at the end portion on the top surface side and curves along the upper edge of the circular hole 73a.

[0043] In the back portion of the extension 7 where the inner wall portion 71 is not provided, a cutout is made over the entire width from a height position corresponding to the flat surface 71b of the inner wall portion 71 to a height position corresponding to the edge of the curved surface 71c. This cutout portion is indicated by the reference numeral 70, and hereinafter will be referred to as the cutout portion 70.

[0044] Two rectangular prisms 61, 61 are provided in the area corresponding to the notch 70 at the rear end edge of the partition wall 6, protruding along the width direction of the notch 70. The length of these rectangular prisms 61 is matched to the width of the notch 70, and the back surface of the rectangular prisms 61 is integrally connected to the back surface of the motor accommodating section 101.

[0045] At the four corners of the extension 7 outside the inner wall 71, circular holes 73a, 73b, 73c, and 73d for connecting the fan cover 8 are provided. Inside each of the circular holes 73a to 73d, a step is provided such that the diameter of the portion deeper than the middle position (the partition 6 side) is smaller than the diameter of the front side. The symbols dn in Fig. 8(B) and 10(B) indicate the surface (the end face of the portion with the smaller diameter) formed at the middle position of the circular holes 73a to 73d by the step.

[0046] Figure 11(A) is an oblique view showing the front surface (the surface that becomes the left side surface of the rotating machine M) of the fan cover 8 attached to the extension portion 7, and Figure 11(B) is an oblique view showing the back surface of the fan cover 8.

[0047] The outer shape of the fan cover 8 is close to a rectangle to correspond to the side of the extension 7. A groove 85 having a contour shape similar to that of the protruding piece 72 of the extension 7 is formed on the back side of the fan cover 8, and a boss portion 81 having an axial hole 80 and a through hole 82 (with circular inner and outer edges) concentrically surrounding the boss portion 81 are provided in the area surrounded by this groove 85. The axial hole 80 is provided in a location facing the axial hole 60 of the partition wall portion 6, and the boss portion 81 protrudes to the front side. The through hole 82 around the boss portion 81 widens toward the front side, and a tapered surface 84 is formed between the edge on the back side and the edge on the front side, and a guard portion 83 is provided between the edge on the back side of the hole 82 and the boss portion 81. The area outside the tapered surface 84 on the front side and the center part including the axial hole 80 of the boss portion 81 are included in the same imaginary plane.

[0048] At the locations corresponding to the circular holes 73a, 73b, 73c, and 73d of the extension portion 7 at the four corners of the fan cover 8, circular holes 86a, 86b, 86c, and 86d having the same diameter as the circular holes 73a to 73d are formed. These holes 86a to 86d are also through holes, and cylindrical protrusions 87a, 87b, 87c, and 87d are continuously formed on the opening end faces on the back side of each of them. The outer periphery of the cylindrical protrusions 87a to 87d is set to a size that fits into the range from the opening end faces of the circular holes 73a to 73d of the extension portion 7 to the surface dn, and the diameter of the hole inside is adjusted to the diameter of the part of the circular holes 73a to 73d deeper than the surface dn.

[0049] The surface near the boundary between the end surface and the main surface, which is the top surface and the front surface of the front side of the fan cover 8, is a convex curved surface, and the circular hole 86b on the front side of the top part is formed at a position that overlaps the ridge of this curved surface.

[0050] With the above configuration, the cylindrical protrusions 87a, 87b, 87c, and 87d on the back side of the fan cover 8 are fitted into the corresponding circular holes 73a, 73b, 73c, and 73d of the extension portion 7, and the holes of the cylindrical protrusions 87a to 87d are connected to the portions of the circular holes 73a to 73d that are deeper than the surface dn. The circular holes 86a to 86d of the fan cover 8 are also aligned with the corresponding circular holes 73a to 73d of the extension portion 7, and the circular protrusions 87a to 87d are connected to the deeper portions of the circular holes 73a to 73d by tapping screws 91a to 91d (shown in Figs. 4 and 7(B)) that are inserted through the circular holes 86a to 86d and abut against the end faces of the cylindrical protrusions 87a to 87d.

[0051] Due to the connection between the cylindrical protrusions 87a-87d and the circular holes 73a-73d, the peripheral portions of the circular protrusions 87a-87d of the fan cover 8 overlap the four corners of the extension portion 7, and the protruding portions of the protruding pieces 72 of the extension portion 7 fit into the grooves 85 of the fan cover 8, so that the open side surface of the extension portion 7 is blocked by the fan cover 8. The center of the shaft hole 80 of the fan cover 8 is also precisely aligned with the center of the shaft hole 60 of the partition portion 6.

[0052] The left edge of the notch 70 on the rear side of the extension 7 is also covered by the fan cover 8, and as shown in Fig. 3, a rectangular hole 70a partitioned by the rectangular columns 61, 61 is formed on the rear side of the housing body 1 in an area corresponding to the fan accommodating section 100. This rectangular hole 70a serves as an exhaust hole for drawing air out of the fan accommodating section 100, and the through-hole 82 around the boss section of the fan cover 8 serves as an intake hole for drawing air into the fan accommodating section 100. Therefore, hereinafter, the rectangular hole 70a will be referred to as the "exhaust hole 70a" and the through-hole 82 will be referred to as the "intake hole 82". The rectangular columnar body 61 functions as a guard to prevent fingers from being inserted into the inside of the fan housing portion 100 through the exhaust hole 70a.

[0053] Bearings 9A and 9B are fitted into the shaft holes 60 and 80 of the partition wall 6 and the fan cover 8, respectively (see FIG. 14(B)). In order to stably support the bearing 9A, the shaft hole 60 of the partition wall 6 is provided with a step so that the diameter of the portion not integrated with the extension 7 (left side wall 140) is smaller than the diameter of the portion integrated with the extension 7 (see FIGS. 10(A)(B) and 14(B)). The diameter of the opening edge of the shaft hole 80 of the fan cover 8 on the front side (outside the fan housing portion 100) is also smaller than the diameter of the opening edge on the back side (see FIGS. 11(B) and 14(B)). As described above, the centers of the shaft holes 60 and 80 are precisely aligned, so that the precision of the centering of the bearings 9A and 9B is ensured, and the drive shaft 5 can be rotated smoothly.

[0054] A support plate 111 having pillars 11L, 11R, each having a cylindrical long hole 13L, 13R, is provided on the inner surface of a wall 110 on the rear side of the motor housing section 101 of the housing main body 1 (see Figs. 8(A), 9, and 10(A)). The width of the support plate 111 is equal to the width of the inner surface of the wall 110, but the height of the support plate 111 is smaller than that of the wall 110.

[0055] A support plate 121 is also provided on the inner surface of the wall 120 on the front side of the motor housing section 101, and is integral with the pillars 12L, 12R including cylindrical long holes 14L, 14R (shown in FIG. 6) (see FIGS. 8(A), 9, and 10(A)). The width of this support plate 121 is set to be equal to the width of the inner surface of the wall 120, but its height is higher than the wall 120, and the front end faces of the left and right side walls 130, 140 are connected to the front of the part protruding from the wall 120. Furthermore, cylindrical protrusions 15L, 15R are provided integrally on the upper surfaces of the pillars 12L, 12R, which are connected to the open end faces of the long holes 14L, 14R and protrude upward.

[0056] The range of the long holes 13L, 13R in the pillars 11L, 11R on the rear side is limited to the range necessary for screwing the inside of the pillars 11L, 11R, but the long holes 14L, 14R in the pillars 12L, 12R on the front side are through holes that pass through the pillars 13L, 13R and further through the bottom plate 150 of the housing main body 1.

[0057] As shown in Fig. 6, rectangular frames w1, w2, w3, and w4 are provided at the four corners of the outer surface of the bottom plate 150 of the housing main body 1. The long hole 14R opens in the rectangular frame w2 at the right end of the front side, and the long hole 14L opens at a position shifted to the right from the rectangular frame w1 at the left end of the front side. As shown in Figs. 4 and 5, rubber feet g are fitted into each of the rectangular frames w1 to w4. Instead of the rectangular frames w1 to w4, fitting portions in which the respective frame portions are changed to grooves may be formed on the outer surface of the bottom plate 150, and the rubber feet g may be fitted into these fitting portions.

[0058] Fig. 12(A) shows the configuration of the front side of the housing cover 10, and Fig. 12(B) shows the configuration of the back side of the housing cover 10. The front surface of the housing cover 10 is shaped to be flush with the top and front surfaces of the fan accommodating section 100 when the housing cover 10 is placed over the opening of the housing main body 1, but as shown in Fig. 12(A), a rectangular recess 160 is provided at the end on the rear side, and circular holes 16L, 16R are formed at both ends inside the recess 160. These circular holes 16L, 16R are also through holes, and have the same diameter as the long holes 13L, 13R of the pillars 11L, 11R of the housing main body 1.

[0059] 12B, a connected body of two cylindrical protrusions 17pL and 17qL, one large and one small, is attached to a location corresponding to the circular hole 16L on the rear surface of the housing cover 10, with the larger protrusion 17pL aligned with the opening end face of the circular hole 16L. A similar connected body of cylindrical protrusions 17pR and 17qR is attached to a location corresponding to the circular hole 16R on the rear surface of the housing cover 10, with the larger protrusion 17pR aligned with the opening end face of the circular hole 16R. The length of the cylindrical protrusions 17pL and 17pR is matched to the length of the step between the wall portion 110 on the rear side of the housing main body 1 and the support plate 111, and the outer circumferential surface of the cylindrical protrusions 17qL and 17qR is set to a size that fits into the long holes 13L and 13R of the pillars 11L and 11R of the support plate 111.

[0060] A support plate 181 having a similar shape to the support plates 111, 121 of the motor accommodating section 101 is provided on the front side of the rear surface of the housing cover 10. The elongated holes 19L, 19R of the pillars 18L, 18R on both sides of this support plate 181 are set to a size that allows the cylindrical protrusions 15L, 15R of the pillars 12L, 12R on the front side of the housing main body 1 to fit therein.

[0061] The housing cover 10 having the above configuration is placed on the support plate 111 and the upper end surface of the front wall 120 by fitting the cylindrical protrusions 17qL, 17qR on the rear side into the long holes 13L, 13R of the pillars 11L, 11R on the rear side of the housing body 1 and fitting the cylindrical protrusions 15L, 15R of the pillars 12L, 12R on the front side of the housing body 1 into the long holes 19L, 19R of the pillars 18L, 18R on the front side. The circular protrusions 17qL, 17qR are connected to the pillars 11L, 11R by tapping screws (not shown) inserted from the circular holes 16L, 16R on the front side, and the pillars 18L, 18R are connected to the pillars 12L, 12R by tapping screws 92L, 92R (shown in FIG. 6) inserted from the open end faces of the long holes 14L, 14R on the bottom surface of the housing body 1 and protruding from the cylindrical protrusions 15L, 15R.

[0062] After the above connection, a rectangular plate 162 having a shape corresponding to the recess 160 is fitted into the recess 160 of the housing cover 10 (see Figs. 1, 2 and 7(A)). This rectangular plate 162 is used as a nameplate on which the name of the product or the manufacturer is written.

[0063] A support base 20 (shown in FIG. 14(B) described later) that supports a support portion of the motor 2 is provided at a midpoint in the depth direction (left-right direction) on the inner surface of the bottom plate 150 of the motor housing section 101. A motor mount 21 is connected to the support base 20, and the motor 2 is placed thereon with the output shaft 23 facing the partition wall section 6 (see FIGS. 8(A) and 9). A protective cover 22 is placed on the motor 2 from above, and the protective cover 22 is connected to the motor mount 21 by screws (reference numbers omitted).

[0064] Two rectangular holes, one large and one small, 131, 132 are formed in the lower part of the right side wall 130 of the motor accommodating section 101 (see FIG. 10(A)). In addition, cylindrical protrusions 151, 152 of the same length are provided in the vicinity of the pillars 11R, 12R on the inner surface of the bottom plate 150 (see FIG. 10(A), 14(A) and (B)).

[0065] The circuit board 3 is mounted with a switch 31 and a DC jack 32 for operating the motor 2 (see Fig. 8(A) and Fig. 9). The circuit board 3 is placed on each of the cylindrical protrusions 151, 152 and aligned so that the operating surface of the switch 31 and the opening surface of the DC jack 32 enter the rectangular holes 131, 132 of the right side wall portion 130, and is connected to the holes of these protrusions 151, 152 with screws (reference numbers omitted).

[0066] Figure 13(A) is a diagram showing the configuration of the motor 2 and the drive shaft 5, Figure 13(B) is a diagram showing the connection structure of the motor 2 and the drive shaft 5 in the rotating machine M, and Figure 13(C) is a diagram showing the state in which the fan 4 is attached to the drive shaft 5.

[0067] As shown in Fig. 13(A) and the following Fig. 14, a coupling 24 having a rectangular mounting hole 24a is connected to an output shaft 23 of a motor 2. The drive shaft 5 is cylindrical except for one end that corresponds to the mounting hole 24a, and a screw hole 50 is formed in the range from the tip surface of the cylindrical portion to a predetermined position in the longitudinal direction. Furthermore, a pair of pin holes 51A, 51B are formed in the intermediate portion in the longitudinal direction of the drive shaft 5 along a direction perpendicular to the axial direction.

[0068] As shown in Figure 13(B), the drive shaft 5 is connected to the coupling 24 and is supported by bearings 9A, 9B at positions on the right hand side of each pin hole 51A, 51B of the drive shaft 5. These bearings 9A, 9B are disposed inside each shaft hole 60, 80 of the partition wall portion 6 and the fan cover 8, so that when the drive shaft 5 connected to the motor 2 is passed through the bearings 9A, 9B of each shaft hole 60, 80, each pin hole 51A, 51B is located near the left hand side of the shaft holes 60, 80. Pin members 52A, 52B of a predetermined length are inserted into these pin holes 51A, 51B.

[0069] 13(C), the fan 4 of this embodiment is a centrifugal fan made up of a disk-shaped base 40, a boss 41 provided integrally with the center of the base 40, and a number of blades 42 each having a surface whose tip portion is bent in a clockwise direction. Each blade 42 is connected to the outer circumferential surface of the boss 41 and the surface of the base 40 with its surface direction aligned with the axial direction of the boss 41, and the position of each blade 42 relative to the boss 41 and the base 40 is adjusted so that the tip portions of the blades are disposed at regular angles relative to the center of rotation. Although not shown in the figure, a pair of rectangular recesses (similar in shape to the recesses 205, 206 of the rotating drum D shown in Figure 15) facing each other across the axial hole of the boss portion 41 are formed on the back surface of the base 50 in order to fit the pin member 52A, and an arc-shaped protrusion (similar in shape to the protrusions 201b, 201c shown in Figure 15) is provided in the area where no recesses are formed on the outer peripheral edge of the axial hole to abut against the inner ring of the bearing 9A to assist in the rotation of the inner ring.

[0070] Fig. 14(A) is a plan view of the rotating machine M with the housing cover 10 removed (from Fig. 8(B) above, without the circuit board 3), and Fig. 14(B) is a cross-sectional view taken along line AA of the plan view. Since these figures aim to show a specific connection structure between the drive shaft 5 and the fan 4 in the rotating machine M, Fig. 14(B) omits illustration of the motor mount 21 and protective cover 22 and shows only the cross-sectional shape of the motor 2 and the support base 20 to which the motor mount 21 is attached.

[0071] 14(B), drive shaft 5 connected to motor 2 via coupling 24 is passed through bearings 9A, 9B in shaft holes 60, 80 of partition section 6 and fan cover 8, and is supported in a state protruding to the left of fan accommodating section 100. Pin member 52A passed through pin hole 51A is located near the opening edge of shaft hole 60 in partition section 6 inside the accommodating space for fan 4, and pin member 52B passed through pin hole 51B is located near the opening edge of shaft hole 80 in fan cover 8 outside the accommodating space for fan 4.

[0072] The fan 4 is disposed in a range surrounded by the arc-shaped surface 71a of the inner wall 71 of the fan housing 100 by passing the boss portion 41 over the drive shaft 5 (see FIGS. 8(A) and 8(B)). In this position, the pin member 52A fits into a recess on the back surface of the base 40 of the fan 4, preventing the fan 4 from shifting in the axial direction, and the fan 4 can be held in a fixed position on the drive shaft 5 while rotating.

[0073] Figure 15(A) is a diagram showing the side (right side) of the rotating drum D that faces the fan accommodating section 100 when attached to the rotating machine M, and Figure 15(B) is an enlarged view of the area within the dotted line frame in Figure 15(A).

[0074] The rotating drum D of this embodiment is composed of a drum body 200 in which a boss portion 201 including a rotation center and a cylindrical peripheral wall portion 202 are connected via a plurality of spoke portions 203, and a brush sheet 210 attached to the surface of the peripheral wall portion 202. The brush sheet 210 is composed of a strip-shaped base sheet 211 made of cloth or flexible resin, on one side of which a large number of brush bristles 212 are planted, and on the other side of which an adhesive layer (not shown) is provided, and is attached to the entire surface of the peripheral wall portion 202 by the adhesive layer. The adhesive strength of the adhesive layer is adjusted so that the brush sheet 210 does not easily come off the peripheral wall portion 202, but can be removed from the peripheral wall portion 202 by applying a certain amount of tensile force. It is also possible to attach the brush sheet 210 to the peripheral wall portion 202 by means of a double-sided tape or the like, without providing an adhesive layer on the base sheet 211.

[0075] A pair of recesses 205, 206 for fitting the pin member 52B are provided on the surface of the boss portion 201 facing the fan accommodating portion 100, sandwiching the central shaft hole 201a, and arc-shaped protrusions 201b, 201c extending forward of the shaft hole 201a are provided in the area of ​​the outer circumferential edge of the shaft hole 201a of the boss portion 201 where the recesses 205, 206 are not formed. The rotating drum D is connected to the area protruding from the fan cover 8 of the drive shaft 5 with the pin member 52B fitted in the recesses 205, 206 and the left side surface of the boss portion 201 fastened to the screw hole 50 of the drive shaft 5 by the fastening screw 95 (see Figs. 1, 3, 4, and 6). When in this connected state, the protrusions 201a, 202b come into contact with the inner ring of the bearing 9B to assist the rotation of the inner ring.

[0076] The motor 2 of the rotating machine M having the above-mentioned configuration is set to rotate counterclockwise. In accordance with this rotation, the fan 4 and the rotating drum D also rotate counterclockwise. In the fan housing section 100, the air around the fan 4 is pressurized and flows in the direction of rotation due to centrifugal force generated by the rotation of the fan 4. The pressurized air is released from pressure at a location facing the free space FS where the fan 4 is not arranged, and is forcefully released into the free space FS, and then travels across the free space FS and is exhausted to the outside of the housing main body 1 through the exhaust hole 70a formed by the cutout section 70.

[0077] The air flow creates a negative pressure in the internal space of the fan housing section 100, and as a result, the air around the rotating drum D is drawn into the fan housing section 100 through the gaps 204 (shown in FIGS. 15(A) and (B)) between the spokes 203 and the intake holes 82 of the fan cover 8. The drawn-in air also travels along a path similar to that described above and is exhausted to the outside from the exhaust holes 70a of the housing body 1.

[0078] When a clogged file or other object to be cleaned is brought into contact with the tips of the brush bristles 212 on the outer periphery of the rotating drum D, the dirt stuck in the file is scraped out by the brush bristles 212, and turns into fine dust that leaves the rotating drum D. This dust is also sucked into the fan housing section 100 together with the air, and then discharged from the exhaust hole 70a on the rear side.

[0079] Therefore, for example, by installing the above-mentioned device S near a window with the rear face of the housing body 1 facing the window and performing cleaning work with the window open, dust generated during the work can be taken into the fan housing part 100 and then discharged outside through the exhaust hole 70a. Furthermore, by arranging a dust collecting device such as a dust box 300 of a second embodiment described later on the rear side of the rotating machine M, the dust discharged from the fan housing part 100 can be quickly collected.

[0080] The device S having the above configuration is mainly used for removing clogging from bar files and sandpaper, but it can also be used for removing fine dust and debris from tools other than files and from the workpiece to be processed. There may be a demand for cleaning during the processing work, not just after the processing work is completed.

[0081] FIG. 16 shows an example in which a cleaning device S is arranged in a ventilation booth BT used for processing work in order to meet the above demand. The ventilation booth BT in this example mainly comprises a box-shaped housing 400 with an open front, two rectifying plates 401, 402 supported inside the housing 400, and a ventilation unit 403 including a fan 404. The housing 400 is large enough to be installed on the top surface of an office desk. The rectifying plates 401, 402 are arranged in a row in front and behind with a backward inclination that lowers toward the back of the housing 400, and gaps that serve as air passages are formed between the front rectifying plate 401 and the inner top surface and inner front surface of the housing 400, between the rear rectifying plate 402 and the inner bottom surface and inner back surface of the housing 400, and between the rectifying plates 401, 402. A through hole (not shown) of a size corresponding to the intake port of ventilation unit 403 is provided on the top of housing 400, and ventilation unit 403 is attached to the top of housing 400 by aligning its intake port with this through hole. A duct hose 405 extending to the outdoors is attached to the exhaust port of ventilation unit 403.

[0082] With the above-mentioned configuration, the housing 400 is divided into front and rear by the straightening vanes 401, 402, and the space BR on the rear side of the straightening vanes 401, 402 (hereinafter referred to as the "rear space BR") becomes a static pressure chamber that is made negative pressure as the ventilation unit 403 is operated, and the space FR on the front side of the straightening vanes 401, 402 (hereinafter referred to as the "front space FR") becomes the user's work space.

[0083] In the example of FIG. 16, the cleaning device S of the first embodiment is disposed in the front space FR of the housing 400 with its back surface facing the straightening plates 401, 402.

[0084] When the ventilation unit 403 of the ventilation booth BT is driven, the air in the rear space BR of the housing 400 is sucked into the ventilation unit 403 and discharged to the outside through the duct hose 405, and the rear space BR is made negatively pressurized. Accordingly, the air in the front space FR of the housing 400 flows into the rear space BR through the above-mentioned gap, and further, outside air enters the front space FR from the opening on the front side, and similarly moves from the front space FR to the rear space BR, and this air is also discharged to the outside, and the air flows in the same direction.

[0085] For example, when grinding small parts with sandpaper, the cleaning device S is placed inside the ventilation booth BT in the position shown in Fig. 16, and the grinding work is performed in the front space FR while moving both the ventilation unit 403 and the rotating machine M. Dust generated by the grinding work is carried by the air current inside the housing 400 due to the action of the ventilation unit 403, moves from the front space FR to the rear space BR, and is further discharged outside through the ventilation unit 403 and duct hose 405.

[0086] When sandpaper that has become clogged due to grinding work is brought into contact with the brush bristles 212 of the rotating drum D, the suction force of the nearby fan housing 100 causes most of the dust removed from the sandpaper to be sucked into the fan housing 100. The sucked-in dust is then released from the exhaust hole 70a on the rear side, and is then carried by the air current inside the housing 400 to the rear space BR, where it is discharged outside along with the dust from the grinding work.

[0087] Therefore, by placing the device S at a location outside the user's dominant hand holding the sandpaper and moving the ventilation unit 403 of the ventilation booth BT and the rotating machine M, dust generated by the rotation of the rotating drum D can be taken into the fan housing part 100 of the rotating machine M and sent outside via the above-mentioned route without scattering in front of the user (the space where the grinding work is performed). In this way, dust generated by the cleaning work can be prevented from entering the user's field of vision, and dust can also be prevented from adhering to the parts to be ground.

[0088] Therefore, the user can take measures to ensure that the small areas to be ground are not overlooked, such as placing a finger near the area to be ground, while performing grinding, and can also clean the sandpaper as necessary to restore the performance of the sandpaper that has deteriorated due to clogging.

[0089] <Second Example> Fig. 17 and Fig. 18 are perspective views showing the appearance of the device S1 according to the second embodiment, Fig. 19(A) and (B) are a perspective view and a left side view showing the configuration of the housing body 1 of the rotating machine M1 of the device S1 from the same direction as Fig. 10(A) and (B), and Fig. 20 is a perspective view showing the housing body 1 from a direction where the back surface is visible.

[0090] In the second embodiment, the components common to the first embodiment in these figures are given the same reference numerals as in the first embodiment, and explanations of the components that have not changed from the first embodiment are omitted, and the explanation focuses on the changed configuration.

[0091] The device S1 of the second embodiment is a cleaning device provided with a rotating drum D having the same configuration as in the first embodiment. The basic configuration of the rotating machine M1 is also the same as in the first embodiment, but a dust box 300 for collecting dust discharged from the exhaust hole 70a is attached to the rear side of the housing main body 1 of this rotating machine M1.

[0092] 20, a rectangular recess 170 is formed on the outer surface of the wall 110 on the rear side of the housing main body 1 of this embodiment, the recess 170 having the same width and at the same height as the notch 70 of the extension 7 and continuing to the notch 70. A main surface 171 in the recess 170 and end surfaces 172, 173 continuing above and below the main surface 171 are all flat surfaces.

[0093] The upper and lower end faces 172, 173 of the recess 170 extend to the left edge of the extension 7, so that the recess 170 and the cutout 70 are connected in series. The area where these are connected (indicated by reference numeral 175) becomes the fitting portion that supports the dust box 300.

[0094] With the formation of the fitting portion 175, the two rectangular columns 61, 61 that protruded from the partition wall 6 along the end face of the cutout portion 70 in the first embodiment are changed to cylindrical columns 62, and are disposed inside the end edge on the back side (at a position above the center of the flat surface 71b of the inner wall portion 71). The positions of both ends of the protruding pieces 72 of the inner wall portion 71 have also been changed to be forward of the cylindrical columns 62, and the grooves 85 on the back side of the fan cover 8 (not shown) have also been changed to a shape that corresponds to the protruding pieces 72.

[0095] Fig. 21(A) shows the front side of the dust box 300 (which becomes the back side when attached to the fitting portion 175), and Fig. 21(B) shows the surface that becomes the back side of the dust box 300. As shown in these figures and Figs. 17 and 18, the dust box 300 of this embodiment is composed of a rectangular main part 301 with gently curved edge parts, and four sub parts 302, 303, 304, and 305 that are integrally provided on each side of the main part 301. Each of the sub parts 302 to 305 is a rectangular body of a constant width in which the corners on the main part 301 side are rounded to match the main part 301, and a rectangular opening surface of a size corresponding to the fitting portion 175 is formed by the end faces of the sub parts 302 to 305 opposite to the main part 301. The width of each of the sub-portions 302 to 305 is set to be sufficiently wider than the width of the upper and lower end faces 172, 173 of the recess 170, and the opening surface of each of the sub-portions 302 to 305 is a flat surface.

[0096] Six rectangular holes 306 are formed in the side of the main part 301 facing the secondary part 304, arranged in two rows and three columns along the secondary part 304 and the secondary part 302. A dust collection filter 307 is attached to the area where these rectangular holes 306 are formed from the inner surface side of the main part 301. This dust collection filter 307 is detachably attached to the main part 301 by means of a double-sided tape or the like having a suitable adhesive strength.

[0097] Of the two sub-sections 302, 303 that form the width portion on the long side, two rectangular plates 311, 312 are integrally provided on the inner surface of the sub-section 302 close to the arrangement of the rectangular holes 306, with the surface direction perpendicular to the sub-section 302. The short sides of these rectangular plates 311, 312 continuing to the sub-section 302 are set to be equal to the width of the inner surface of the sub-section 302, and the long sides extending from the sub-section 302 are set to be approximately half the length of the sub-sections 304, 305.

[0098] Rectangular plate 312 is provided slightly to the left of the arrangement of rectangular holes 306, and the other rectangular plate 311 is provided at a predetermined distance from sub-section 305. The distance between rectangular plate 311 and sub-section 305 is set to be wider than the width of cutout section 70 of fan accommodating section 100.

[0099] On the inner surface of the sub-part 303 at a position corresponding to the midpoint between the rectangular plates 301, 302, a rectangular plate 313 of the same size as the rectangular plates 311, 312 is integrally provided on the sub-part 303 with its surface direction perpendicular to the sub-part 303.

[0100] The dust box 300 configured as described above is fitted into the fitting portion 175 of the housing body 1 with the sub-portion 302 facing upward and the arrangement of the rectangular holes 306 facing the right side surface. The left edge of the notch portion 70 of the fitting portion 175 is blocked by the fan cover 8, and an exhaust hole 70a similar to that of the first embodiment is formed in the rear portion of the housing body 1, and this exhaust hole 70a is connected to the internal space of the dust box 300. The end faces on the opening side of each of the rectangular plates 311, 312, 313 also come into contact with the main surface 171 of the recess 170.

[0101] Fig. 22 is a cross-sectional view of the housing body 1 of the rotating machine M1 to which the dust box 300 is attached, cut along a horizontal plane passing through the center of rotation of the drive shaft 5, and shows the air flow that occurs when the fan 4 is rotated (as in Fig. 14(B) above, the circuit board 3 is omitted). Fig. 23(A) is a rear view of the same dust box 300 as Fig. 21, and Fig. 23(B) is a perspective view of the dust box 300, showing the air flow inside the dust box 300.

[0102] In the rotating machine M1 of the second embodiment, the motor 2 and the fan 4 also rotate counterclockwise, and the air around the fan 4 flows along the rotation direction of the fan 4 and is pushed out toward the exhaust hole 70a, and then released from the exhaust hole 70a into the inside of the dust box 300.

[0103] The air released from the pressurization by the fan 4 rushes out from the exhaust hole 70a with force, and first hits the inner surface of the main part 301 and changes its direction of travel to the right. Most of the air flowing in the space above the center in the height direction hits the rectangular plates 311, 313, and 312 in order and proceeds to the right side where the rectangular hole 306 is located. Most of the air flowing in the space below the center in the height direction also hits the rectangular plates 313 and 312 in order and proceeds to the right side. The air that reaches the location of the rectangular hole 306 is exhausted from the rectangular hole 306 to the outside.

[0104] The air flows described above create negative pressure in the internal spaces of both the fan housing section 100 and the dust box 300, and as a result, air around the rotating drum D is sucked into the fan housing section 100 through the gaps 204 between the spokes 203. This air is also guided to the dust box 300 and discharged to the outside through the rectangular hole 306.

[0105] Dust generated by contacting the object to be cleaned with the rotating drum D rotating together with the fan 4 is sucked into the fan housing section 100 together with the air, enters the inside of the dust box 300, and moves to the right. However, when the air collides with the rectangular plates 311-313 provided midway along the path of movement, the impact of the collision causes the dust in the air to fall to the bottom (secondary section 303) of the dust box 300.

[0106] Since the actual air flow inside the dust box 300 is more complicated than described above, it is considered that some of the dust moves forward without hitting the rectangular plates 313-313, and some of the dust does not fall even if it hits the rectangular plates 313-313. However, the dust that does not fall and reaches the right end of the dust box 300 together with the air is also captured by the dust collection filter 307.

[0107] In this way, according to the cleaning device S1 of the second embodiment, dust generated by the cleaning work can be accumulated inside the dust box 300, and the cleaning work can be performed without worrying about the handling of the dust released from the exhaust hole 70a. Also, the dust box 300 can be appropriately removed from the housing body 1 to remove the accumulated dust, and the dust collection filter 307 can be removed and reinstalled after cleaning, or replaced with a new dust collection filter 307, thereby maintaining the dust collection effect of the dust box 300.

[0108] The device S1 of the second embodiment can also be installed and used in the front space FS of the ventilation booth BT shown in Fig. 16. In that case, if the device S1 is installed in the same posture as the device S shown in Fig. 16, the dust taken in the fan housing section 100 can be discharged from the exhaust hole 70a into the housing 400 of the ventilation booth BT without attaching the dust box 300 to the housing main body 1, and the dust can be carried by the air flow of the housing 400 and discharged to the outside.

[0109] <Method of assembling the device of each embodiment> The cleaning device S of the first embodiment can be assembled by installing the motor 2 and the circuit board 3 in the motor accommodating section 101 of the housing main body 1 shown in FIG. 10, and then attaching the drive shaft 5, the fan 4, the fan cover 8, the housing cover 10, and the rotating drum D in that order.

[0110] 14(B), the motor 2 is installed on the motor mount 21 with the output shaft 23 facing the partition wall 6, and then the protective cover 22 is placed from above and the cover 22 and the motor mount 21 are screwed together. Through this series of operations, the motor 2 is fixed in a predetermined position in the motor housing 101.

[0111] The circuit board 3 is also fixed to the right side of the motor accommodating section 101 by aligning the screw holes (not shown) provided in advance in two places on the board 3 with the circular protrusions 151, 152 and screwing them in, with the switch 31 and DC jack 32 facing towards the right side wall section 130. This brings the operating surface of the switch 31 and the opening surface of the DC jack 32 into the rectangular frames 131, 132.

[0112] It is not important to first install the motor 2 or the circuit board 3. After the installation of both is completed, the motor 2 is connected to a connector (not shown) of the circuit board 3 by a cord, so that the motor 2 becomes rotatable.

[0113] After this, the bearing 9A is fitted into the shaft hole 60 of the partition wall 6, the drive shaft 5 is passed through the hole of the bearing 9A, and the drive shaft 5 is connected to the output shaft 23 of the motor 2 via the coupling 24. The pin member 52A is passed through the pin hole 51A of the drive shaft 5, the boss portion 41 of the fan 4 is passed through the drive shaft 5 and moved towards the partition wall 6, and the pin member 52A is fitted into the recess on the back surface of the base 40. The boss portion 81 of the fan cover 8 is passed through the drive shaft 5, and the cylindrical protrusion on the back surface is inserted into the boss portion 81. By sequentially performing the steps of fitting 87a-87d into the circular holes 73a-73d of the extension portion 7, and then inserting tapping screws 91a-91d through the circular holes 86a-86d of the fan cover 8 and connecting the circular holes 73a-73d to the circular holes 73a-73d with the screws 91a-91d, the rotating machine M can be assembled to the state in which the fan cover 8 is attached to the housing main body 1 as shown in Figures 8(A)(B) and 9.

[0114] Next, the housing cover 10 is fitted to the housing body 1 so that the cylindrical protrusions 17qL, 17qR on the back surface of the housing cover 10 enter the long holes 13L, 13R of the pillars 11L, 11R on the rear side of the housing body 1, and the cylindrical protrusions 15L, 15R on the front side of the housing body 1 enter the long holes 19L, 19R of the pillars 18L, 18R of the housing cover 10. Then, tapping screws (not shown) are inserted into the opening end faces of the circular holes 16L, 16R of the housing cover 10 to fasten the cylindrical protrusions 17qL, 17qR to the long holes 13L, 13R, completing the connection between the housing body 1 and the housing cover 10 on the rear side. In addition, tapping screws 92L, 92R are inserted from the opening end faces of the long holes 14L, 14R on the bottom surface of the housing main body 1, and their heads are abutted against the inner top surfaces of the pillars 12L, 12R so that the screws 92L, 92R protrude from the circular protrusions 15L, 15R connected to the long holes 14L, 14R, and the screws 92L, 92R are tightened, completing the connection between the housing main body 1 and the housing cover 10 on the front side.

[0115] Furthermore, a rectangular plate 162 which will serve as a nameplate is fitted into the recess 160, rubber feet g are fitted into each of the frames w1 to w4 on the bottom surface, and the pin member 52b is inserted into the pin hole 51b exposed in the portion of the drive shaft 5 which protrudes from the fan cover 8, thereby completing the rotating machine M shown in Figures 7(A) and (B).

[0116] Thereafter, the boss portion 201 of the rotating drum D is inserted from the tip of the drive shaft 5, the pin member 52B is fitted into the aforementioned recesses 205, 206, a washer 96 is passed through the drive shaft 5, and a fastening screw 95 is inserted into the screw hole 50, thereby connecting the left side surface of the boss portion 201 to the tip surface of the drive shaft 5, thereby completing the cleaning device S shown in Figures 1 to 6.

[0117] After the assembly is completed, the rotating drum D, fan cover 8, fan 4, drive shaft 5, motor 2, and rotating base plate 3 can be removed by reversing the above procedure. Therefore, if any of the components malfunction while the device S is in use, the device S can be continued to be used by replacing only that component. If the fan 4 or fan cover 8 become dirty with dust, they can be removed, washed, and then reinstalled. The inner surfaces of the extension 7 and partition 6 can also be exposed and cleaned in a similar manner. The brush sheet 210 of the rotating drum D can also be removed as appropriate, and a washed sheet or a new sheet can be installed.

[0118] The device S1 of the second embodiment is assembled in the same manner as the device of the first embodiment, but an additional step is to fit a dust box 300 into a fitting portion 175 consisting of a notch 70 and a recess 170 on the rear of the housing body 1 of the rotating machine M.

[0119] The dust box 300 of the second embodiment can be easily fitted into the fitting portion 175 by aligning the outer edge of the opening end face of the auxiliary portion 303 with the boundary position between the bottom end face 173 of the fitting portion 175 and the main surface 171, and then rotating the other portions from a position away from the fitting portion 175 towards the fitting portion 175 around the outer edge as an axis; or by aligning the outer edge of the opening end face of the auxiliary portion 302 with the boundary position between the top end face 172 of the fitting portion 175 and the main surface 171, and similarly rotating the other portions towards the fitting portion 175 around the outer edge as an axis.

[0120] The fitted dust box 300 can be removed from the fitting part 175 by rotating the other part in a direction away from the fitting part 175, using the outer edge of the opening side of the sub-part 302 or 303 as an axis. Therefore, the exhaust function and dust collection function of the dust box 300 can be maintained by removing the dust box 300 from a place where some dust does not matter or inside a garbage bag, removing the dust accumulated inside, and cleaning the dust collection filter 307 or replacing it with a new one.

[0121] <Modification> In the first and second embodiments described above, the extension portion 7 of the fan accommodating section 100 is formed in a form in which the entire width of the rear portion is cut out, and the fan cover 8 is attached to the extension portion 7 to block the open side edge of the cutout portion 70 to form the exhaust hole 70a, but this is not limited to the above, and a through hole with a completely closed periphery may be formed in the rear portion of the extension portion 7 and used as the exhaust hole.

[0122] In the first and second embodiments, the shaft hole 60 in the partition wall 6 is hardly shifted from the center position of the partition wall 6 in the height direction, but the shaft hole 60 may be shifted from the center position of the partition wall 6 in both the height direction and the width direction by changing the height of the partition wall 6 without changing the height of the drive shaft 6. In this case, the height of the extension portion 7 and the fan cover 8 do not necessarily need to match the partition wall 6, but it is necessary to secure a space or free space FS inside the extension portion 7 for the fan 4 to fit in, and to form the shaft hole 80 of the fan cover 8 in a position opposite the shaft hole 60.

[0123] A connecting member may be attached to the bottom surface of the housing body 1 of each embodiment or to the bottoms of the walls 110, 120, 130 of the housing body 1, and the housing body 1 may be fixed to the upper surface of the workbench via this connecting member. An example of the connecting member is shown in FIG.

[0124] 24, the rectangular frames w1-w4 are removed from the bottom plate 150 of the housing body 1 of the device S1 of the second embodiment, and a rectangular plate 155 of a size that protrudes from the front and rear of the housing body 1 is connected to the bottom plate 150. A pair of screw holes 156, 156 is provided in a protruding portion 155a on the front side of the rectangular plate 155, and a similar pair of screw holes is also provided in a portion of a protruding portion 155b on the rear side that is not shown in the drawing.

[0125] By connecting the housing body 1 to an appropriate position on the workbench using screws inserted into these screw holes, it is possible to prevent the devices S, S1 from moving due to vibrations caused by the rotation of the motor 2, and it is also possible to prevent the devices S, S1 from falling off the workbench even if some external force is applied to the devices S, S1.

[0126] In the housing body 1 of the first and second embodiments, the partition portion 6 and the extension portion 7 are integrally connected to the motor accommodating portion 101, and the components of the extension portion 7 and the motor accommodating portion 101 are also integrally connected, so they need to be manufactured by molding using a mold, but this may be changed to a housing in which multiple parts are integrated by connecting them. The material of the housing does not need to be particularly limited, and it may be made of metal such as steel, or it may be made of plastic as long as strength can be ensured.

[0127] It is not essential that the motor and the circuit board are housed in a closed space, and the housing may consist of only the housing body 1 without the housing cover 10. Also, the main body of the rotating machine may have a simple configuration in which the motor 2 and the circuit board 3 are attached to the upper surface of a flat support plate, and a fan housing section is erected on the support plate in a position facing the output shaft of the motor 2, without taking the form of a housing.

[0128] It is not essential that the circuit board 3 is included in the housing body 1, and the circuit board 3 may be housed in a separate small case, and this case may be connected to the motor 2 via a cord.

[0129] The drive shaft 5 of the rotating machines M, M1 in the first and second embodiments can be used with a tool for machining operations attached thereto, in addition to a cleaning tool.

[0130] For example, by attaching a sheet having an uneven surface made of abrasive grains (such as sandpaper) instead of the brush sheet 210 to the peripheral wall portion 202 of the rotating drum D used in each embodiment, a simple grinder can be made and used for tasks such as deburring model parts, scraping off paint, and polishing surfaces.

[0131] Instead of the rotating drum D, a disk-shaped tool (chuck) having a mechanism for gripping a workpiece can be attached to the drive shaft 5 of the rotating machine M, and simple lathe processing can be performed using this device and a blade such as a cutter knife or a carving knife. A device configured such that a disk-shaped tool with a cutting edge formed on its outer periphery is attached to the drive shaft 5 of the rotating machine M, M1 can also be used for cutting or machining.

[0132] In this way, the rotating machines M, M1 having the same configuration as the above-described embodiment can be used for various tasks simply by changing the tool attached to the drive shaft 5. In any case, dust generated during the task is sucked into the fan housing section 100 and guided to a place where it is acceptable to release dust, such as the dust box 300, so that the task can be carried out safely without diffusing dust around the work site.

[0133] <Assembly kit> The rotating machines M, M1 of the first and second embodiments can be provided to end users at an affordable price by providing them to end users as assembly kits including the elements that constitute them and having the end users assemble them according to the procedure described above.

[0134] This kit can also include tools for mounting the rotating drum D or other drive shaft 5, but if such tools are not included and the rotating drum, chuck, disc cutter, and other tools are provided separately, the user can purchase the basic assembly kit and the tools appropriate for their purpose to assemble the device for the desired work.

[0135] It is not necessarily necessary for an assembly kit intended only for the rotating machines M, M1 to include all components. A kit may be provided that excludes one or more components, and multiple types of optional items may be prepared for the excluded components, allowing the user to select the optional items.

[0136] For example, if the motor and its supporting members, the motor mount and protective cover, were removed from the assembly kit, and multiple types of motors with different rotation speeds and torques were combined with their respective supporting members and provided as optional items, the user would be able to select a motor suitable for the intended use of the rotating machines M, M1 and assemble a rotating machine with the desired performance. In this case, even if the motors and motor mounts are different in size and shape, by providing a support base on the inner bottom surface of the housing body 1 in a shape that allows various motor mounts to be attached, it would be possible to easily incorporate any optional item selected into the housing body 1.

[0137] By providing the components included in the assembly kit separately as individual items, even if part of the rotating machine breaks down or becomes damaged, that part can be replaced with a new one, allowing the rotating machines M, M1 to be used indefinitely. [Explanation of symbols]

[0138] S, S1 Cleaning equipment M, M1 Rotating Machine D Rotating drum 1. Main unit 2 Motors 3 Circuit Board 4 Fans 5 Drive shaft 6 Partition wall 7 Extension 8 Fan cover 9A, 9B Bearings 10 Case cover 20 Support stand 21 Motor mount 22 Protective cover 23 Output shaft 51A,51B pin hole 52A, 52B Pin member 60,80 shaft hole 70a Exhaust hole 82 Air Intake Hole 100 Fan housing

Claims

1. A machine for rotatably supporting a tool involved in a machining operation, comprising: the motor support member for supporting the motor with its axial direction aligned horizontally; a drive shaft connected to an output shaft of the motor supported by the motor support member; and a fan housing for housing the centrifugal fan, the fan accommodating portion includes a partition portion provided in an upright position facing an output shaft of the motor, an extension portion extending from the partition portion toward an opposite side to the motor to form a space in which the centrifugal fan is placed, and a fan cover connected to the extension portion and facing the partition portion, a shaft hole for passing the drive shaft through is provided at a position shifted in the width direction from the center position of the partition, a shaft hole is also provided in the fan cover at a position facing the shaft hole in the partition, and an intake hole is provided in the fan cover at a position other than the shaft hole, and an exhaust hole is provided in the extension portion along the height direction away from the shaft hole in the opposite direction with respect to the center position of the partition, A drive shaft connected to the output shaft of the motor is passed through the shaft holes of the partition wall and the fan cover and protrudes from the fan cover, the shaft of the centrifugal fan is attached to the drive shaft in the area between the partition wall and the fan cover, and the part of the drive shaft protruding from the fan cover serves as a place to attach tools related to the machining operation. Rotating machinery.

2. A pin member for supporting the centrifugal fan and the appliance is inserted in a position of the drive shaft near the axial hole of the partition wall inside the space in which the centrifugal fan is placed, and in a position outside the space near the axial hole of the fan cover, with the pin member being oriented along a direction perpendicular to the axial direction. A rotary machine according to claim 1.

3. An apparatus having a rotating drum having an outer circumferential surface on which brush bristles are attached or an uneven surface formed by abrasive grains, and a rotating machine that rotatably supports the rotating drum, the rotating machine includes a motor and a centrifugal fan, a motor support member for supporting the motor with its axial direction aligned horizontally, a drive shaft connected to an output shaft of the motor supported by the motor support member, and a fan housing for housing the centrifugal fan, the fan accommodating portion includes a partition portion provided in an upright position facing an output shaft of the motor, an extension portion extending from the partition portion toward an opposite side to the motor to form a space in which the centrifugal fan is placed, and a fan cover connected to the extension portion and facing the partition portion, a shaft hole for passing the drive shaft through is provided at a position shifted in the width direction from the center position of the partition, a shaft hole is also provided in the fan cover at a position facing the shaft hole in the partition, and an intake hole is provided in the fan cover at a position other than the shaft hole, and an exhaust hole is provided in the extension portion along the height direction away from the shaft hole in the opposite direction with respect to the center position of the partition, A drive shaft connected to the output shaft of the motor is passed through the shaft holes of the partition wall and the fan cover and protrudes from the fan cover, a shaft portion of the centrifugal fan is attached between the partition wall and the fan cover of the drive shaft, and a shaft portion of the rotating drum is attached to the portion of the drive shaft protruding from the fan cover. Cleaning or grinding equipment.

4. The device includes at least a drive shaft to which a tool related to a machining operation and a centrifugal fan are attached, a motor for rotating the drive shaft, and a plurality of members constituting a main body supporting the centrifugal fan, the centrifugal fan, a fan cover, and a drive unit for the motor, the main body includes a base portion to which a support member for supporting the motor in a horizontal position is connected, a partition portion provided in an upright position facing an output shaft of the motor supported by the base portion and the support member, and an extension portion extending from the partition portion to an opposite side to the motor and forming a space in which the centrifugal fan is located, a shaft hole for passing the drive shaft is provided at a position shifted in the width direction from a center position of the partition wall, and an exhaust hole is provided in a portion of the extension portion along a height direction away from the shaft hole with respect to the center position of the partition wall, the fan cover is connected to the extension portion so as to face the partition wall portion, and an axial hole is provided at a position facing the axial hole of the partition wall portion in the connected state, and an intake hole is provided at a position other than the axial hole, the drive shaft has a length sufficient to protrude from the fan cover when connected to the output shaft of the motor and passed through the shaft holes of the partition wall and the fan cover, the range of the drive shaft between the partition wall and the fan cover being a location for attaching the shaft part of the centrifugal fan, and the portion of the drive shaft protruding from the fan cover being a location for attaching a tool related to the machining operation; An assembly kit for a rotating machine or a device using the same.

5. a pin hole is formed in a position of the drive shaft that is adjacent to the shaft hole of the partition portion inside the space in which the centrifugal fan is placed and in a position outside the space that is adjacent to the shaft hole of the fan cover, the pin hole being aligned in a direction perpendicular to the axial direction of the drive shaft; A pair of pin members inserted into the pin holes are further included.

5. An assembly kit for the rotating machine according to claim 4 or a device using the rotating machine.

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