Portable polishing machine

Abstract

To provide a new art which enables improvement of operability of a portable polisher configured to move orbitally.SOLUTION: A portable polisher includes a polisher body, a battery holster, and a power cord. The polisher body includes: a body housing which houses a motor; and a polishing part configured to be moved orbitally by rotation of the motor. The battery holster includes a battery attachment part to which a battery may be attached. The power cord is configured to supply electric power of the battery attached to the battery attachment part to the polisher body. The power cord connects the polisher body with the battery holster without going through the housing.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a portable grinder.

Background Art

[0002] There is known a sander configured to cause an abrasive pad to perform an orbital motion. Japanese Unexamined Patent Application Publication No. 2013-129014 describes a so-called random orbital sander in which a battery mounting portion is formed on the outer surface of a housing, and the power of a battery is supplied to a motor so that an abrasive pad performs a rotational motion and an eccentric motion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the sander described in Japanese Unexamined Patent Application Publication No. 2013-129014, by arranging a battery mounting portion so as to bring a relatively heavy battery closer to the output shaft at the center of the sander, the weight balance of the sander is improved, and the operability and stability are enhanced. However, regardless of the technique described in Patent Document 1, there has been a demand for a new technique capable of improving the operability of a portable grinder configured to cause an abrasive pad to perform an orbital motion.

Means for Solving the Problems

[0005] The present disclosure can be realized in the following forms. A portable polishing machine is provided according to a first embodiment of the present disclosure. The portable polishing machine comprises a polishing machine body, a battery holster, and a power cord. The polishing machine body comprises a main body housing for housing a motor and a polishing section configured to perform orbital motion by the rotation of the motor. The battery holster comprises a battery mounting section for detachably mounting a battery. The power cord is configured to supply power from the battery mounted in the battery mounting section to the polishing machine body. The power cord is configured to connect the polishing machine body and the battery holster without the need for a housing.

[0006] In this configuration, the relatively heavy battery is mounted in the battery mounting section of the battery holster, thus reducing the weight of the polishing machine itself. This improves the operability of the portable polishing machine. Furthermore, vibrations generated by orbital motion are suppressed from being transmitted to the battery mounting section, thus extending the lifespan of both the battery mounting section and the battery mounted in it. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of the sander according to the first embodiment. [Figure 2] Another perspective view of the sander according to the first embodiment. [Figure 3] This is a top view of the sander body of the first embodiment. [Figure 4] This is a longitudinal cross-sectional view of the sander body of the first embodiment. [Figure 5] This is a top view of the battery holster with the battery installed and the power cord in the first embodiment. [Figure 6] This figure shows a longitudinal cross-sectional view of a battery holster with a battery installed and a power cord in the first embodiment. [Figure 7] This is a top view of the sander body of the first embodiment with the power cord connected. [Figure 8] This is a longitudinal cross-section of Sanda in its first state. [Figure 9] This is a longitudinal cross-section of Sanda in its first state. [Figure 10] This is a top view of the sander body of the second embodiment. [Figure 11] This is a longitudinal cross-sectional view of the sander body of the second embodiment. [Figure 12] This is a longitudinal cross-sectional view of the sander body of the third embodiment. [Figure 13] This figure shows a longitudinal cross-sectional view of a battery holster with a battery installed and a power cord in the third embodiment. [Figure 14] This diagram shows a simplified configuration of a sander that can be connected to a cleaner. [Modes for carrying out the invention]

[0008] The following describes in detail, with reference to the drawings, representative and non-limiting examples of the present disclosure. This detailed description is intended simply to show those skilled in the art details for carrying out preferred examples of the present disclosure and is not intended to limit the scope of the present disclosure. In addition, the additional features and disclosures disclosed below may be used separately from or in conjunction with the other features and disclosures to provide further improved portable polishing machines, methods for manufacturing the same and methods for using the same.

[0009] Furthermore, the combinations of features and processes disclosed in the following detailed descriptions are not essential for implementing the disclosure in the broadest sense, and are included solely to illustrate typical examples of the disclosure. Moreover, the various features of the typical examples described above and below, as well as the various features described in the independent and dependent claims, do not necessarily have to be combined in the same way as the examples described herein, or in the order listed, to provide additional and useful embodiments of the disclosure.

[0010] All features described in this specification and / or the claims are intended to be disclosed separately and independently of each other, as limitations to the original disclosure and the claimed subject matter, apart from the configuration of the features described in the embodiments and / or claims. Further, all descriptions regarding numerical ranges and groups or collections are made with the intention of disclosing intermediate configurations as limitations to the original disclosure and the claimed subject matter.

[0011] In one or more embodiments, the power cord may include a first connector for connecting to the polishing machine body. The polishing machine body may include a second connector configured to connect to the first connector and supply power from the battery to the motor.

[0012] According to the above configuration, compared with a configuration in which the power cord is permanently connected to the polishing machine body in advance, the handling of the portable polishing machine becomes easier. Further, the battery holder and the power cord can be connected to and used with other portable polishing machines having a second connector.

[0013] In one or more embodiments, the rotation axis of the motor may extend in the vertical direction, and the polishing portion may be located below the main body housing. A main gripping portion having a shape that can be gripped by a user may be provided at the upper end of the main body housing. When viewing the main gripping portion and the motor in the vertical direction (the direction of the rotation axis) from above the main gripping portion, the main gripping portion may be arranged to overlap the motor such that the outer edge of the main gripping portion surrounds the outer edge of the motor (such that the outer edge of the main gripping portion is located outside the outer edge of the motor).

[0014] According to the above configuration, the user can easily perform the polishing operation by gripping the main gripping portion and pressing the polishing machine body downward, and can effectively suppress the vibration generated by the orbital movement of the polishing portion.

[0015] In one or more embodiments, the polishing machine body may further include an auxiliary gripping portion connected to the main gripping portion and extending in a direction intersecting the rotation axis.

[0016] According to the above embodiment, the user can perform a polishing operation by pressing the polishing machine body against the workpiece while gripping the main gripping portion with one hand and the auxiliary gripping portion with the other hand, so that the polishing operation can be stabilized.

[0017] In one or more embodiments, the polishing machine body may include a dust collecting nozzle configured to discharge dust generated by the polishing portion polishing the workpiece. The dust collecting nozzle may be provided below the auxiliary gripping portion in the vertical direction. When the auxiliary gripping portion and the dust collecting nozzle are viewed in the vertical direction from above the auxiliary gripping portion, the dust collecting nozzle may be arranged to overlap the auxiliary gripping portion.

[0018] According to the above embodiment, since the dust collecting nozzle is arranged at a position overlapping the auxiliary gripping portion in the vertical direction, the polishing machine body can be miniaturized. Also, since the dust collecting nozzle does not interfere with the polishing operation, the operability of the portable polishing machine can be improved.

[0019] In one or more embodiments, the second connector may be provided at an end of the auxiliary gripping portion in the extending direction, on the side away from the main gripping portion.

[0020] According to the above embodiment, since the second connector is arranged at a position away from the polishing portion of the polishing machine body, it is possible to prevent the power cord from interfering with the polishing operation. Also, when the auxiliary gripping portion is arranged on the user side, the polishing portion is arranged on the side far from the user, and the battery holder is worn on the user to perform the polishing operation, the power cord is located near the user's body, so it is possible to further prevent the power cord from interfering with the polishing operation.

[0021] In one or more embodiments, when the extension direction of the auxiliary gripping portion is defined as the front-rear direction, and the side of the auxiliary gripping portion that connects to the main gripping portion is defined as the front side and the opposite side as the rear side, the rear end of the dust collection nozzle may be configured to have a dust collection container capable of storing the dust detachably attached to it. The polishing portion may also include a polishing pad driven by the motor. Furthermore, the power cord may be configured so as not to come into contact with the dust collection container when the portable polishing machine is in a first state. The first state may satisfy (i) to (iv): (i) The dust collection container is attached to the dust collection nozzle. (ii) The polishing pad is placed on a flat surface. (iii) The battery holster and the polishing machine body are connected by the power cord. (iv) The battery holster is positioned so that its own weight does not add to the power cord.

[0022] According to the above configuration, the portable polishing machine is configured such that the dust collection container and the power cord do not come into contact (are kept apart) when in the first state. Therefore, friction between the dust collection container and the power cord due to vibrations generated by orbital motion is suppressed. As a result, the durability of the power cord can be improved, and consequently, the durability of the portable polishing machine can be improved.

[0023] In one or more embodiments, the first state may further be a state in which the battery holster satisfies the following (a) to (c): (a) The battery holster is positioned behind the rear end of the dust collection container. (b) The connection portion of the battery holster to the power cord is directed upward. (c) The battery holster is positioned above the lower end position of the power cord when the power cord is extended downward. Note that the power cord being extended downward also means that the power cord is not slack and hangs down to a position below the polishing machine body. The power cord being extended downward can also mean that the power cord is fully extended.

[0024] According to the above configuration, the first state may include an arrangement (position) in which the battery holster satisfies (a) to (c), and the portable polishing machine is configured such that the dust collection container and the power cord do not come into contact when in the first state. Therefore, friction between the dust collection container and the power cord due to vibrations generated by orbital motion is effectively suppressed.

[0025] In one or more embodiments, the power cord may include a cord body and a cover. The cord body may be configured to provide electrical conductivity between the battery mounted in the battery mounting section and the polishing machine body. The cover may extend rearward from the first connector and be configured to cover a portion of the cord body.

[0026] According to the above configuration, the cover guides the cord body in the direction of its extension (rearward), thereby preventing the cord body from coming into contact with the dust collection container. This improves the durability of the cord body. Note that "covering a part of the cord body" may mean surrounding the outside (outer circumference, radially outward) of the cord body for a portion of its total length.

[0027] In one or more embodiments, the flexibility of the cover may be less than the flexibility of the cord body.

[0028] According to the above configuration, the cover is configured such that its flexibility is less than that of the cord itself, allowing the cord to be guided in its own direction of extension (rearward). Therefore, contact between the cord and the dust collection container can be further suppressed.

[0029] In one or more embodiments, when the dust collection container is attached to the rear end of the dust collection nozzle, the cover may be positioned above the dust collection container. Furthermore, the cover may be configured to overlap the dust collection container by 30% or more in the front-to-back direction.

[0030] According to the above configuration, the cover overlaps the dust collection container by more than 30% and is positioned above the dust collection container, so that the cord body is guided in its own direction of extension (rearward) while effectively preventing the cord body from coming into contact with the dust collection container.

[0031] In one or more embodiments, the cover may be configured such that, when the portable polishing machine is in the first state, the first virtual plane including the plane intersects with an axis passing through the center of the cover and extends rearward and upward from the first connector.

[0032] According to the above configuration, the cover extending to the rear and upward allows the cord body to be guided to the rear and upward. Therefore, contact between the cord body and the dust collection container can be effectively prevented.

[0033] In one or more embodiments, the cover may be configured such that, when the portable polishing machine is in the first state, the angle between a first virtual plane including the plane and a second virtual plane passing through the rear end of the polishing pad and contacting the lower end of the dust collection container is 5° or more. Alternatively, the cover may be configured such that the angle between the first virtual plane and the second virtual plane is 15° or less.

[0034] According to the above configuration, even if the dust collection container vibrates or the front end of the polishing section is slightly lifted upward during polishing, contact between the lower end of the dust collection container and the workpiece is suppressed. Therefore, a decrease in the durability of the polishing machine body to which the dust collection container is connected can be suppressed. In addition, since contact between the dust collection container and the workpiece and damage to the workpiece can be suppressed, the polishing accuracy can be improved.

[0035] In one or more embodiments, the power cord may be configured such that, when the portable polishing machine is in the first state, the angle between the tangent line drawn from the intersection of the first virtual plane including the plane and the cord body to the cord body and the axis line passing through the center of the cover is 55° or more. Alternatively, the power cord may be configured such that the angle between the tangent line and the axis line is 90° or less.

[0036] According to the above configuration, by setting the angle between the tangent and the axis to 55° or more, contact between the cord body and the dust collection container can be effectively suppressed. Furthermore, by setting the angle between the tangent and the axis to 90° or less, the cord body does not extend excessively far behind the polishing machine body, but bends downward behind the polishing machine body, thereby suppressing the cord body from interfering with the polishing work. As a result, the durability of the power cord and the operability of the portable polishing machine can be improved.

[0037] In one or more embodiments, the cord body may intersect a first virtual plane including the plane at a first position behind the polishing machine body when the portable polishing machine is in the first state. The first position may be forward of a position behind the rear end of the polishing machine body by a length in the front-rear direction of the polishing machine body.

[0038] According to the above configuration, the cord body does not extend excessively far behind the polishing machine body, but bends downward behind the polishing machine body. Therefore, the cord body is less likely to interfere with the polishing work, thereby improving the operability of the portable polishing machine.

[0039] In one or more embodiments, the polishing machine body may be configured such that its mass in the front-rear direction balances at a predetermined equilibrium point with the dust collection container attached to its rear end. The equilibrium point may be provided at the auxiliary gripping portion.

[0040] According to the above configuration, the mass (moment of mass) of the polishing machine body to which the dust collection container is attached is balanced in the front-rear direction by the auxiliary gripping part that extends in the front-rear direction, thereby improving the operability of the portable polishing machine.

[0041] In one or more embodiments, the polishing machine body may be configured such that the distance between the midpoint of the length of the dust collection container in the front-to-back direction and the equilibrium point is 0.150 m (meters) or more. Alternatively, the polishing machine body may be configured such that the distance between the midpoint of the length of the dust collection container in the front-to-back direction and the equilibrium point is 0.200 m or less.

[0042] According to the above configuration, when a dust collection container is attached to the polishing machine body, the operability of the portable polishing machine can be improved.

[0043] In one or more embodiments, the polishing machine body may be configured such that the distance between the rotating shaft of the motor and the equilibrium point is 0.040 m or more. Alternatively, the polishing machine body may be configured such that the distance between the rotating shaft and the equilibrium point is 0.100 m or less.

[0044] According to the above configuration, the length of the polishing machine body in the front-to-back direction can be set to a length suitable for polishing work, while preventing the distance between the balance point and the motor's rotation axis from becoming too large. Therefore, the operability of the portable polishing machine can be improved.

[0045] In one or more embodiments, the portable polishing machine may be configured such that the moment of mass of the portion of the motor from the equilibrium point to the rotation axis is 0.20 Nm (Newton-meter) or more. Alternatively, the portable polishing machine may be configured such that the moment of mass is 0.50 Nm or less.

[0046] According to the above configuration, it is possible to suppress the mass moment of the part in front of the equilibrium point from becoming too large. Therefore, it is suitable for portability. cell phoneWe can provide polishing machines for use.

[0047] In one or more embodiments, the battery holster may include a hook. The hook may be configured to allow the battery holster to be attached to a user. The length of the cord body may be 0.80 m or more. Alternatively, the length of the cord body may be 2.0 m or less.

[0048] According to the above configuration, the user can attach the battery holster to a belt or the like using a hook and perform polishing work. Furthermore, since the length of the cord itself is 0.80m or more, it is possible to prevent the cord from being pulled between the battery holster and the polishing machine body even when the user extends their arm. Also, since the length of the cord itself is 2.0m or less, it is possible to prevent the cord from interfering with the polishing work. As a result, the operability of the sander 1 can be improved.

[0049] In one or more embodiments, the rear end of the dust collection nozzle may be detachably connected to a hose that is connected to a suction device for sucking up the dust. The battery holster may have a mounting portion that can be attached to the suction device. The length of the cord body may be 2.0 m or more. Alternatively, the length of the cord body may be 6.0 m or less.

[0050] According to the above configuration, it is possible to prevent the cord from being pulled between the polishing machine body and the suction device, and to prevent the cord from interfering with the polishing work.

[0051] In one or more embodiments, the portable polishing machine may include the dust collection container.

[0052] According to the above configuration, the portable polishing machine is configured so that the dust collection container and the power cord do not come into contact when in the first state. Therefore, friction between the dust collection container and the power cord due to vibrations generated by orbital motion is suppressed. As a result, the durability of the power cord can be improved, and consequently, the durability of the portable polishing machine can be improved.

[0053] In one or more embodiments, the polishing machine body may further include a controller configured to control the rotation of the motor.

[0054] According to the above configuration, the connection between the controller and the motor is made inside the polishing machine body, allowing for a thinner power cord compared to when the controller is located in the battery holster. Therefore, the power cord can be less likely to interfere with the polishing work.

[0055] In one or more embodiments, the controller may be positioned between the auxiliary gripping portion and the dust collection nozzle in the vertical direction.

[0056] According to the above configuration, the polishing machine itself can be made smaller, and the operability of the portable polishing machine can be improved.

[0057] In one or more embodiments, the battery holster may include a controller configured to control the rotation of the motor.

[0058] According to the above configuration, vibrations caused by orbital motion during polishing can be suppressed from being transmitted to the controller, thus extending the lifespan of the controller. Furthermore, compared to a configuration where the polishing machine itself has a controller, the polishing machine itself can be made smaller.

[0059] In one or more embodiments, the battery holster may include the battery which is mounted in the battery mounting section.

[0060] According to the above configuration, the battery is mounted in the battery holster, which allows for a lighter grinding machine body. Therefore, the operability of the grinding machine body can be improved.

[0061] <First Embodiment> The following describes a sander 1 as an embodiment of a portable polishing machine, with reference to Figures 1 to 6. The sander 1 comprises a sander body 10, a battery holster 80, and a power cord 70 connecting the sander body 10 and the battery holster 80. The sander 1 is also called a random orbit sander.

[0062] The sander body 10 comprises a housing 20 and a polishing section 50. The housing 20 includes a main housing 21 that houses the motor 40 (see Figure 4), a controller housing 35 that houses the controller 60, and a handle section 30. The polishing section 50 is positioned on one side of the extending direction of the rotation axis A1 of the motor shaft 42 and is configured to perform eccentric motion and rotational motion (random orbit motion) due to the rotation of the motor 40. The handle section 30 is connected to the main housing 21 on the side of the extending direction of the motor shaft 42 opposite to the side where the polishing section 50 is located, and extends away from the main housing 21. The sander body 10 is a small sander with a total weight of approximately 1.0 kg.

[0063] In the following explanation, for the sake of clarity, the direction in which the rotation axis A1 extends is defined as the vertical direction, and the side on which the polishing section 50 is located relative to the main housing 21 is defined as the lower side, and the opposite side as the upper side. Furthermore, of the directions perpendicular to the vertical direction, the direction in which the handle section 30 extends is defined as the front-rear direction, and of the front-rear direction, the side on which the connection part of the handle section 30 to the main housing 21 (the first end 31 of the handle section 30) is located is defined as the front side, and the opposite side as the rear side. In addition, the direction perpendicular to both the front-rear direction and the vertical direction is defined as the left-right direction.

[0064] As shown in Figures 1 to 4, the main housing 21 is formed along the vertical direction. The outer diameters of the upper end 23 and lower end 24 of the main housing 21 are larger than the outer diameter of the intermediate part 22 in the vertical direction of the main housing 21. A switch 65 for switching the motor 40 on and off is provided at the front end of the upper end 23 of the main housing 21.

[0065] The upper end portion 23 of the main housing 21 has a size and shape suitable for the user to grip. The upper end portion 23 of the main housing 21 functions as the gripping portion (hereinafter referred to as the main gripping portion 25) of the sander body 10. As shown in Figures 3 and 4, the main gripping portion 25 is formed in a substantially circular shape when viewed from above. When the main gripping portion 25 and the motor 40 are viewed from above in the direction of the rotation axis A1, the main gripping portion 25 has a shape and size that overlaps with the motor 40 such that the outer edge of the main gripping portion 25 surrounds the outer edge of the motor 40.

[0066] The handle portion 30 has its first end 31 connected to the main grip portion 25 and extends from the main grip portion 25 rearward along the front-rear direction. The rear end (second end 32) of the handle portion 30 is provided with a second connector 53, which will be described later. The width of the handle portion 30 in the left-right direction is formed to be suitable for the user to grip. The upper end of the handle portion 30 and the upper end of the main grip portion 25 are formed smoothly. The user can perform polishing work by gripping the main grip portion 25 with one hand and the handle portion 30 with the other hand. The user can also position the area around the wrist of the hand gripping the main grip portion 25 with one hand on the handle portion 30. The handle portion 30 functions as an auxiliary grip portion of the sander body 10.

[0067] The controller housing 35 is located below the handle portion 30 and extends in the front-rear direction. The controller housing 35 is connected to the lower rear end of the intermediate portion 22 of the main body housing 21 and extends upward and rearward from this connection point. The upper rear portion of the controller housing 35 is connected to the lower rear portion of the handle portion 30. A through hole 38 is formed between the upper front portion of the controller housing 35 and the lower front portion of the handle portion 30, passing through the housing 20 in the left-right direction.

[0068] A dust collection nozzle 39 is located below the controller housing 35. The dust collection nozzle 39 extends in the front-rear direction. The dust collection nozzle 39 communicates with the rear end of the lower end 24 of the main body housing 21. The dust collection nozzle 39 is provided so as to be inclined upward and rearward from the connection point with the lower end 24 of the main body housing 21. The rear end 391 of the dust collection nozzle 39 protrudes further rearward than the handle portion 30. In this embodiment, a dust collection pack 105 is connected to the rear end 391 of the dust collection nozzle 39. Dust generated by the polishing operation of the workpiece is discharged from the through-holes provided in the polishing pad 51 to the dust collection pack 105 via the lower end 24 of the main body housing 21 and the dust collection nozzle 39.

[0069] As shown in Figure 3, when viewing the handle portion 30, controller housing 35, and dust collection nozzle 39 from above in a vertical direction, the controller housing 35 and dust collection nozzle 39 are positioned overlapping with the handle portion 30. The controller housing 35 is positioned between the handle portion 30 and the dust collection nozzle 39 in the vertical direction, and is slightly larger than the handle portion 30 and dust collection nozzle 39 in the horizontal direction.

[0070] As shown in Figure 4, the motor 40 housed in the main housing 21 comprises a motor body 41 having a stator and rotor, and a motor shaft 42 extending in the vertical direction. The motor shaft 42 is supported by bearings 44 and 45 held in the main housing 21.

[0071] A fan 47 is fixed perpendicularly to the lower end of the motor shaft 42 via a bolt 46 that extends vertically. The fan 47 is located at the lower end 24 of the main body housing 21.

[0072] The fan 47 has a bearing box 49 mounted to it, which is further eccentrically attached via a bearing 48 that is eccentrically mounted on the rotation axis A1 of the motor shaft 42.

[0073] The polishing section 50 is equipped with a polishing pad 51. The polishing pad 51 is formed in a disc shape and a sanding paper can be attached to it. The polishing pad 51 is connected to the bearing box 49 by a bolt 56 that extends in the vertical direction. The bottom surface of the polishing pad 51 functions as a polishing surface for polishing the workpiece when the sander body 10 is in use. In this embodiment, the drive shaft of the polishing section 50 is also the rotation shaft A1 of the motor 40. In the sander body 10, when the motor 40 rotates, the rotation is transmitted to the bearing box 49 via a bearing 48 that is eccentric to the motor shaft 42, causing the bearing box 49 and the polishing pad 51 to perform eccentric and rotational motion.

[0074] A second connector 53 is provided at the second end 32 of the handle portion 30. The second connector 53 is provided at the second end 32 of the handle portion 30 on an inclined wall 34 that slopes downward and rearward from the upper end of the handle portion 30. The second connector 53 includes a terminal portion 54 that includes positive and negative power terminals and a communication terminal, and a cylindrical wall 55 that surrounds the terminal portion 54 and protrudes diagonally upward from the inclined wall 34. The first connector 71 of the power cord 70, which will be described later, is detachably connected to the second connector 53.

[0075] The controller 60, housed in the controller housing 35, is electrically connected to the second connector 53 and the motor 40. The controller 60 is equipped with various circuits and is configured to control the operation of the motor 40 by controlling the power supplied to the motor 40 from the battery 101 mounted in the battery holster 80.

[0076] As shown in Figures 1 and 2, an adapter housing 36 is provided on the right wall at the rear of the handle portion 30. The adapter housing 36 is a recessed portion of the side wall at the rear end of the handle portion 30. As shown in Figure 4, a wireless communication adapter 61 is inserted into and mounted in the adapter housing 36. The wireless communication adapter 61 is electrically connected to the controller 60. The wireless communication adapter 61 communicates wirelessly with other ancillary equipment. The ancillary equipment is, for example, a dust collector that sucks up chips and can be connected to the dust collection nozzle 39. By communicating wirelessly, the start and stop operations of the ancillary equipment are linked to the start and stop operations of the sander body 10. The wireless communication adapter 61 is paired with a wireless communication adapter 61 that has been previously attached to the ancillary equipment to enable wireless communication. Pairing is performed by pressing both a button on the wireless communication adapter 61 and a button on the wireless communication adapter 61 of the ancillary equipment. The button is, for example, a button for activating the WPS function or the AOSS function. When pairing is established, the user turns on the switch 65 on the sander unit 10 to start the sander unit 10, and this startup information is transmitted from the wireless communication adapter 61 to the ancillary equipment. The ancillary equipment receives the signal from the wireless communication adapter 61 and starts up based on the signal. The state in which wireless communication is possible can be determined by the illumination of a lamp on the wireless communication adapter 61.

[0077] Next, the battery holster 80 and the power cord 70 will be described using Figures 1, 2, 5, and 6. The battery holster 80 comprises a block-shaped battery holster body 81, a battery mounting section 85, and a hook 86. The battery holster 80 also includes a battery holster-side connection section 87 to which one end 72 of the power cord 70 is physically connected.

[0078] Figures 5 and 6 show the battery holster 80 and power cord 70 when the battery 101 mounted in the battery mounting section 85 is placed face down, the battery holster side connection section 87 is positioned towards the front, and the power cord 70 connected to the battery holster side connection section 87 is positioned in the front-to-back direction.

[0079] The battery mounting section 85 is provided in an opening recess (not shown) formed in the lower part of the battery holster body 81. The battery mounting section 85 includes a pair of left and right slide rails extending in the front-rear direction, and positive and negative power terminals and a communication terminal. The pair of slide rails are configured to engage with a pair of rail receiving portions provided on the battery 101. When the battery 101 is slid from the rear of the battery mounting section 85 toward the battery mounting section 85 in the mounting direction (rear to front), the pair of rail receiving portions engage with the slide rails, and the battery 101 is attached to the battery mounting section 85. When the battery 101 is attached to the battery mounting section 85, the positive and negative power terminals and communication terminal of the battery mounting section 85 are electrically connected to the positive and negative power terminals and communication terminal of the battery 101, respectively.

[0080] The hook 86 protrudes upward and forward from the rear upper part of the battery holster body 81. The hook 86 is formed to allow the battery holster 80 to be attached to the user's clothing or belt. The hook 86 also serves as a mounting part for attaching the battery holster 80 to the user.

[0081] The battery holster-side connection portion 87 is a part that protrudes from the front end of the battery holster body portion 81. The battery holster-side connection portion 87 is physically connected to one end 72 of the power cord 70.

[0082] In this embodiment, the battery holster 80 weighs approximately 0.7 kg to 1.0 kg when the battery 101 is installed. Therefore, the weight ratio of the battery holster 80 with the battery 101 installed to the sander body 10 is relatively large.

[0083] The power cord 70 electrically connects the sander body 10 and the battery holster 80, and also physically connects (links) the sander body 10 and the battery holster 80 without the need for a housing. The power cord 70 is also described as not being covered by a housing. The power cord 70 comprises a cord body 73 and a first connector 71.

[0084] The cord body 73 is constructed by covering a power line for supplying power from the battery 101 to the sander body 10 with a protective tube. The tube is made of polyvinyl chloride resin (PVC). The tube may also be made of other synthetic resins, such as rubber or a rubber mixture. The power line is electrically connected to a power terminal provided on the battery mounting section 85. In addition to the power line, the cord body 73 may also include a signal line for the controller 60 to detect an abnormality in the battery 101.

[0085] The first connector 71 is provided at the end of the cord body 73 opposite to one end 72. The first connector 71 comprises a terminal portion 74 connected to the power line of the cord body 73 and a cylindrical engaging portion 75 provided around the terminal portion 74. The area around the first connector 71 of the cord body 73 is covered with a roughly conical cylindrical cover 76 whose outer diameter widens toward the first connector 71.

[0086] The first connector 71 is configured to be detachably attached to the second connector 53 of the sander body 10. In this embodiment, the first connector 71 and the second connector 53 are configured such that when the engaging portion 75 of the first connector 71 is fitted into the cylindrical wall 55 of the second connector 53, the terminal portion 74 of the first connector 71 and the terminal portion 54 of the second connector 53 are electrically connected.

[0087] In the sander 1 configured as described above, the battery 101 is installed in the battery mounting section 85 of the battery holster 80, and when the user turns on the switch 65 of the sander body 10, power from the battery 101 can be supplied to the sander body 10 via the power cord 70. In this embodiment, power from the battery 101 is supplied to the controller 60 via the power terminals of the battery mounting section 85, the power lines of the cord body 73, the terminal section 74 of the first connector 71, and the terminal section 54 of the second connector 53. The controller 60 is connected to the motor 40 by lead wires (power lines and signal lines) and controls the power supplied to the motor 40. When the motor 40 rotates, the polishing section 50 (polishing pad 51) performs eccentric and rotational motion (random orbit motion), enabling polishing of the workpiece.

[0088] According to the first embodiment of the sander 1, the sander body 10 includes a polishing section 50 configured to perform orbital motion. The relatively heavy battery 101 is mounted in the battery mounting section 85 of the battery holster 80, and the sander body 10 and the battery holster 80 are connected by a power cord 70 without a housing. Therefore, since the battery 101 is not mounted in the sander body 10, the weight of the sander body 10 during polishing can be reduced compared to a configuration in which the battery 101 is mounted in the sander body. Consequently, the operability of the sander body 10 and the sander 1 can be improved.

[0089] Furthermore, according to the first embodiment of the sander 1, the weight of the sander body 10 is less than that of a configuration in which the sander body is equipped with a battery. Therefore, even when the workpiece is not positioned vertically downwards, or when the user supports the sander body 10 while performing the polishing work, the sander body 10 can be easily operated. In addition, the burden on the user during the polishing work can be reduced.

[0090] Furthermore, in sanders configured to perform orbital motion, compared to those that do not perform orbital motion, improved performance such as increased polishing accuracy may result in increased vibration. However, in the sander 1 of this embodiment, since the battery 101 is not attached to the sander body 10, vibrations generated by orbital motion are less likely to be transmitted to the battery mounting section 85 and the battery 101. Therefore, the lifespan of the battery mounting section 85 and the battery 101 can be extended.

[0091] According to Sander 1, the user can attach the battery holster 80 to themselves using the hook 86 and perform sanding work. Furthermore, the battery holster 80 and the sander body 10 are connected by a power cord 70 without going through the housing 20. Therefore, compared to a configuration in which the battery holster 80 and the sander body 10 are connected by a housing, the degree of freedom in the positional relationship between the battery holster 80 and the sander body 10 can be increased.

[0092] The main body housing 21 of the sander body 10 houses the motor 40, and the polishing section 50 is located below the main body housing 21. A main gripping section 25 is provided at the upper end of the main body housing 21. When the main gripping section 25 and the motor 40 are viewed from above the main gripping section 25 in the direction of the rotation axis A1, the outer edge of the main gripping section 25 overlaps with the outer edge of the motor 40, so as to surround the outer edge of the motor 40. Therefore, the user can easily perform polishing work by gripping the main gripping section 25 and pressing the sander body 10 downwards, and can effectively deal with vibrations generated by the orbital motion of the polishing section 50.

[0093] Furthermore, the sander body 10 is equipped with a handle portion 30 that extends rearward from the main grip portion 25. Therefore, the user can grip the main grip portion 25 with one hand and the handle portion 30 with the other hand, and press the sander body 10 against the workpiece to perform the polishing work, thus enabling stable polishing.

[0094] Furthermore, when the user grips the main gripping part 25 with one hand, the user can position the area near the wrist of that hand on the handle part 30. In this way, when performing polishing work while gripping the main gripping part 25 with one hand, the user's wrist area can be supported by the handle part 30, thereby reducing the burden on the user's hand and wrist.

[0095] The sander body 10 is equipped with a second connector 53 that allows the first connector 71 of the power cord 70 to be detachably attached. Therefore, the power cord 70 and battery holster 80 can be carried and stored separately from the sander body 10, making the overall handling of the sander 1 easier compared to a configuration in which the power cord 70 is permanently attached to the sander body. In addition, the battery holster 80 and power cord 70 can be connected to and used with other portable polishing machines that have the second connector 53.

[0096] The second connector 53 is provided at the rear end (second end 32) of the handle portion 30 that extends rearward from the main grip portion 25. Therefore, since the second connector 53 is located away from the polishing portion 50 of the sander body 10, the power cord 70 is less likely to interfere with the polishing work. Furthermore, when the handle portion 30 is positioned towards the user and the polishing portion 50 is positioned away from the user, and the battery holster 80 is attached to the user by the hook 86 for polishing work, the power cord 70 is located near the user's body, further reducing the likelihood of the power cord 70 interfering with the polishing work.

[0097] Furthermore, the sander body 10 is equipped with a dust collection nozzle 39, and the dust collection nozzle 39 is positioned so as to overlap with the handle 30 when viewed from above the handle 30 in an up-and-down direction. Therefore, by including the dust collection nozzle 39, it is possible to suppress the increase in size of the sander body 10, and the sander body 10 can be made compact.

[0098] Furthermore, since the sander body 10 is equipped with a controller 60, the battery holster is equipped with the controller 60, and compared to the case where the lead wires connecting the controller 60 and the motor 40 are placed inside the cord body 73 of the power cord 70, the cord body 73 can be made thinner. Therefore, the cord body 73 can be less likely to interfere with the sanding work.

[0099] The controller 60 is housed in the portion of the housing 20 between the handle portion 30 and the dust collection nozzle 39 (controller housing portion 35) in the vertical direction. Therefore, the sander body 10 can be made compact. In addition, since the controller housing portion 35 does not interfere with the sanding work, the operability of the sander 1 can be improved.

[0100] Figures 7 to 9 show the sander 1 in a state (hereinafter also referred to as the first state) that satisfies the following conditions (i) to (iv). In this embodiment, the sander 1 is configured so that the dust collection pack 105 and the power cord 70 do not come into contact when it is in the first state.

[0101] (i) A dust collection pack 105 is connected to the dust collection nozzle 39. (ii) The polishing pad 51 is placed on a flat surface. Note that the plane is a plane perpendicular to the vertical direction (horizontal plane). The plane may be, for example, a machined surface. Figures 8 and 9 illustrate a virtual plane (first virtual plane P1) that includes the plane in question. (iii) The battery holster 80 and the sander body 10 are connected by a power cord 70. In the examples shown in Figures 7 to 9, the first connector 71 and the second connector 53 are connected. (iv) The battery holster 80 is positioned such that its own weight does not add to the power cord 70. In the examples shown in Figures 8 and 9, the battery holster 80 is placed on a predetermined surface (not shown) located below the first virtual plane P1. Condition (iv) can be satisfied when the battery holster 80 is attached to the user's belt or the like by the hook 86 and the user performs polishing work using the sander body 10 (sander 1).

[0102] In this embodiment, the first state further includes the state in which the sander 1 satisfies the following (a) to (c). The following (a) to (c) mainly relate to the state (attitude, arrangement) of the battery holster 80.

[0103] (a) The battery holster 80 is positioned behind the rear end 112 of the dust collection pack 105. Figure 9 shows a virtual plane (fourth virtual plane P4) that passes through the rear end 112 of the dust collection pack 105 and is perpendicular to the front-rear direction. In this embodiment, the battery holster 80 is located behind the fourth virtual plane P4. (b) The connection point between the battery holster 80 and the power cord 70 is oriented upwards. In the example shown in Figure 9, the portion of the battery holster 80 (battery holster side connection part 87) that connects to one end 72 of the power cord 70 is oriented upwards. (c) The battery holster 80 is positioned above the lower end of the power cord 70 when the power cord 70 is extended downward. Figure 9 shows a hypothetical plane (fifth virtual plane P5) that passes through the lower end (one end 72) of the power cord 70 and is perpendicular to the vertical direction when the cord body 73 is extended downward. In the example shown in Figure 9, the battery holster 80 is located above the fifth virtual plane P5. Note that when the power cord 70 (cord body 73) is extended downward, it also means that the cord body 73 hangs down below the sander body 10 without any sagging. When the cord body 73 is extended downward, it can also mean that the cord body 73 is fully extended. Even if the weight of the battery holster 80 is not added to the cord body 73, the cord body may be extended downward depending on the arrangement of the battery holster 80 and the sander body 10.

[0104] In this embodiment, the sander 1 is configured such that the dust collection pack 105 and the power cord 70 do not come into contact (are kept apart) when in the first state described above. Therefore, even if the dust collection pack 105 vibrates due to vibrations generated by orbital motion, friction between the dust collection pack 105 and the power cord 70 is suppressed. As a result, wear on the power cord 70 is suppressed.

[0105] In particular, the sander body 10 of this embodiment has a handle portion 30 that extends in the front-rear direction, and the motor 40, which is the vibration source, and the polishing portion 50 are located in front of the handle portion 30. The dust collection pack 105 is connected to the rear end 391 of the dust collection nozzle 39, which protrudes rearward from the handle portion 30. Therefore, when the user grips the main grip portion 25 and presses the polishing portion 50 against the workpiece to perform polishing work, the dust collection pack 105 may vibrate relatively strongly. However, with the sander 1 of this embodiment, the dust collection pack 105 and the power cord 70 are configured not to come into contact, so wear on the power cord 70 is suppressed. Thus, the durability of the sander 1 can be improved.

[0106] The dust collection pack 105 will now be described. The dust collection pack 105 of this embodiment comprises a mounting portion 106 and a dust collection portion 107. The mounting portion 106 is configured to be detachably attached to the rear end portion 391 of the dust collection nozzle 39. The dust collection portion 107 is connected to the mounting portion 106 and extends rearward from the mounting portion 106. The dust collection portion 107 is configured to store dust discharged from the dust collection nozzle 39 and to discharge air sent out from the dust collection nozzle 39. In this embodiment, the dust collection portion 107 includes an outer case having an air discharge hole and a storage portion provided inside the outer case that can store dust. In this embodiment, the dust collection pack 105 is made of synthetic resin. In other embodiments, the dust collection pack 105 may be made of a cloth or paper container.

[0107] The following describes the configuration of each part of Sander 1, which contributes to the durability and improved operability of Sander 1. In particular, the configuration of the power cord 70 and the sander body 10, and the positional relationship between the power cord 70, the sander body 10, and the dust collection pack 105 will be described in detail.

[0108] In this embodiment, the cover 76 of the power cord 70 extends rearward from the first connector 71 and covers a portion of the cord body 73. Specifically, the cover 76 is positioned on the outside (outer circumference, radially outward) of the cord body 73 for a portion of its total length. Furthermore, the cover 76 is configured such that its flexibility is less than that of the cord body 73 (a protective tube covering the power cord). This configuration allows the cover 76 to guide the cord body 73 backward in its direction of extension while preventing the cord body 73 from coming into contact with the dust collection pack 105.

[0109] The cover 76 is positioned above (directly above) the dust collection pack 105, spaced apart from the dust collection pack 105. The front end 761 of the cover 76 is located approximately at the same position as, or slightly forward of, the front end 111 of the dust collection pack 105 in the front-rear direction. The rear end 762 of the cover 76 is located above (directly above) the dust collection pack 105. The axis A2 passing through the center (radial center) of the cover 76 approximately coincides with the axis (not shown) passing through the center of the first connector 71.

[0110] The cover 76 is configured to overlap the dust collection pack 105 by more than 30% in the front-to-back direction. The length L1 shown in Figure 8 is the length from the front end 111 to the rear end 112 of the dust collection pack 105 (front-to-back length, total length), and the length L2 is the length of the portion of the cover 76 that overlaps the dust collection pack 105. In this embodiment, the length L2 is approximately half of the length L1. In other words, the cover 76 overlaps the dust collection pack 105 by approximately 50%.

[0111] When the sander 1 is in the first state, the cover 76 extends rearward and upward from the first connector 71. At this time, as shown in Figure 8, the axis A2 of the cover 76 intersects with the first virtual plane P1. In other words, the angle R1 between the axis A2 of the cover 76 and the first virtual plane P1 is greater than 0. With this configuration, the cover 76 can guide the cord body 73 rearward and upward.

[0112] Furthermore, in this embodiment, the angle R2 formed by the upper surface 113 of the dust collection pack 105 and the first virtual plane P1 is smaller than the angle R1 formed by the axis A2 of the cover 76 and the first virtual plane P1. In other words, the rearward and upward tilt of the cover 76 is greater than the tilt of the dust collection pack 105. As a result, the cover 76 can guide the cord body 73 rearward and upward while effectively preventing the cord body 73 from contacting the upper surface 113 of the dust collection pack. Note that in Figure 8, for illustrative purposes, the angle R2 is shown as the angle formed by the upper surface 113 and the third virtual plane P3 which is parallel to the first virtual plane P1.

[0113] The cord body 73, guided rearward and upward by the cover 76, bends downward at a predetermined position in the front-rear direction, and as shown in Figure 8, passes behind the rear end 112 of the dust collection pack 105 and intersects with the first virtual plane P1. Figure 8 shows the angle R3 formed by the tangent line A3 drawn from the intersection point N1 of the first virtual plane P1 and the cord body 73 to the cord body 73 and the axis A2 of the cover 76. The angle R3 is preferably 55° or more. By setting the angle R3 to 55° or more, the cord body 73 passes behind the dust collection pack 105 without contacting the dust collection pack 105 and bends downward. Therefore, wear of the cord body 73 can be suppressed. Alternatively, the angle R3 is preferably 90° or less. By setting the angle R3 to 90° or less, it is possible to suppress the cord body 73 from bending downward at a position excessively far rearward from the rear end 112 of the dust collection pack 105. Therefore, the cord body 73 is less likely to interfere with the sanding work. In other words, by configuring the power cord 70 so that the angle R3 is between 55° and 90°, it is possible to improve the durability of the power cord 70 (cord body 73) and improve the operability of the sander 1.

[0114] Figure 9 shows the length (front-to-back length, total length) L3 of the sander body 10. In this embodiment, the position N1 where the cord body 73 intersects the first virtual plane P1 is forward of the position (position N2) which is a length L3 behind the rear end of the sander body 10. By configuring the sander body 10 and power cord 70 in this way, the cord body 73 does not extend excessively far behind the sander body 10, but bends downward behind the sander body 10. Therefore, improved durability of the power cord 70 and improved operability of the sander 1 can be effectively achieved.

[0115] Figure 8 shows a second virtual plane P2 that contacts the lower end (bottom surface 114) of the dust collection pack 105 and passes through the rear end 511 of the polishing pad 51. The angle R4 formed by the first virtual plane P1 and the second virtual plane P2 is preferably 5° or more. With this configuration, even if the dust collection pack 105 vibrates or the front end of the polishing section 50 is slightly lifted upward during polishing, the lower end (bottom surface 114) of the dust collection pack 105 is less likely to come into contact with the workpiece. Furthermore, the angle R4 is preferably 15° or less. With this configuration, the dust collection pack 105 and the cord body 73 can be separated to a certain extent in the vertical direction. Therefore, a decrease in the durability of the dust collection pack 105 and the dust collection nozzle 39 to which the dust collection pack 105 is connected can be suppressed. In addition, since it is possible to suppress the dust collection pack 105 from coming into contact with the workpiece and damaging the workpiece, the polishing accuracy can be improved.

[0116] Furthermore, the length of the cord body 73 is preferably 0.80 m (meters) or more. As described above, the battery holster 80 of the sander 1 is provided with a hook 86, and the user can attach the battery holster 80 to a belt or the like using the hook 86 and perform sanding work. Also, in the sander 1, the cord body 73, which is guided rearward and upward by the cover 76, bends downward at a predetermined position in the front-rear direction, and as shown in Figure 8, passes behind the rear end 112 of the dust collection pack 105 and intersects with the first virtual plane P1. In this configuration, by making the length of the cord body 0.80 m or more, it is possible to suppress the cord body 73 from being pulled between the battery holster 80 attached to the user and the sander body 10, regardless of the size of the user's body, even when the user extends their arm. Furthermore, the length of the cord body 73 is preferably 2.0 m or less. below This prevents the cord body 73 from interfering with the polishing work. Therefore, the operability of the sander 1 can be improved.

[0117] Next, the moment (mass moment) of the sander 1 will be explained. In this embodiment, the sander body 10 is configured such that the mass (mass moment) in the front-rear direction is balanced at a predetermined position (equilibrium point C1, see Figure 9) of the handle portion 30 when the dust collection pack 105 is attached to the dust collection nozzle 39.

[0118] Figure 9 shows the equilibrium point C1, the center point C2 of the dust collection pack 105 in the front-rear direction, and the center point C3 of the controller 60 in the front-rear direction. Also in Figure 9, the distance L4 between the equilibrium point C1 and the center point C2 of the dust collection pack 105, the distance L5 between the equilibrium point C1 and the rotation axis A1 of the motor 40, and the distance L6 between the equilibrium point C1 and the center point C3 of the controller 60.

[0119] The distance L4 is preferably 0.150m or more. Furthermore, the distance L4 is preferably 0.200m or less. This configuration allows the dust collection pack 105 to be positioned in a location that does not interfere with the polishing work. Therefore, the operability of the sander 1 can be improved.

[0120] The distance L5 is preferably 0.040m or more. Furthermore, the distance L5 is preferably 0.100m or less. This configuration allows the length of the sander body 10 to be easily gripped while preventing the distance between the balance point C1 and the rotation axis A1 of the motor 40 from becoming too large. Therefore, the operability of the sander 1 can be improved.

[0121] The moment of mass from the equilibrium point C1 to the motor's rotation axis A1 is preferably 0.20 Nm (Newton-meter) or more. Furthermore, it is preferable that this moment of mass be 0.50 Nm or less. This configuration ensures good balance in the front-to-back direction of the sander body 10 with the dust collection pack 105 attached. Additionally, by configuring the sander body 10 so that the moment of mass from the equilibrium point C1 to the center point C3 falls within the above range, it is possible to prevent the moment in the front portion from becoming too large. Therefore, a sander body 10 suitable for portability can be provided.

[0122] The shapes of each part of the sander 1 in this embodiment are as follows. However, the following values ​​are just examples, and other configurations (shapes) may be adopted for the sander 1, as long as it is equipped with a power cord 70 that physically and electrically connects the sander body 10 and the battery holster 80 without an intermediary housing.

[0123] Distance L4 from equilibrium point C1 to point C2: 0.185 m (meters) Distance L5 from the equilibrium point C1 to the rotation axis A1 of motor 40: 0.050m Distance L6 from equilibrium point C1 to point C3: 0.048m Controller 60 mass: 0.100 kg (kilograms) Weight of dust collection pack 105: 0.130 kg Mass of dust collection pack 105 when the storage compartment is filled with dust: 0.185 kg Mass of the part of the sander body 10 from the balance point C1 forward: 0.780 kg The moment of mass from the equilibrium point C1 to the rotation axis A1 of the motor 40 is 0.38 Nm (Newton-meters).

[0124] <Second Embodiment> The second embodiment of the sander 1A will be described with reference to Figures 10 and 11. Although the power cord 70 and battery holster 80 of the sander 1A are not shown in Figures 10 and 11, the sander 1A of this embodiment is equipped with the power cord 70 and battery holster 80 described in the first embodiment. In the following, the same reference numerals will be used for components similar to those in the above-described embodiment, and their detailed descriptions will be omitted.

[0125] The main difference between the sander 1A of this embodiment and the sander 1 of the first embodiment is that the sander body 10A is configured as an orbital sander.

[0126] Specifically, the polishing section 50A of the sander body 10A comprises a polishing pad 51A and a base 52A mounted on the polishing pad 51A. The base 52A and the housing 20 are connected by a foot (not shown). The foot restricts the rotation of the base 52A.

[0127] Furthermore, in the sander body 10A of this embodiment, the polishing pad 51A is formed in a roughly triangular shape with an acute angle at its front end when viewed in the vertical direction. In addition, in the sander body 10A, the fan 47 is further eccentrically assembled to the bearing box 49A via bearings 481A and 482A which are provided vertically eccentrically on the rotation axis A1 of the motor shaft 42. The other configurations of the sander 1A of the second embodiment are the same as those of the sander 1 of the first embodiment described above, so their description is omitted.

[0128] The sander 1A of the second embodiment has the same configuration as the sander 1 of the first embodiment, except that the rotational movement of the polishing section 50A of the sander body 10A is restricted. Therefore, the sander 1A of the second embodiment also produces the same effects as the sander 1 of the first embodiment.

[0129] In this embodiment, the sander 1A has a mass of 0.700 kg in the front portion from the equilibrium point C1, and a mass moment of 0.34 Nm (Newton meters) in the portion from the equilibrium point C1 to the rotation axis A1 of the motor 40. The configuration of the power cord 70 and the sander body 10A in the sander 1A, the positional relationship between the power cord 70, the sander body 10A, and the dust collection pack 105, and the moment (mass moment) of the sander 1A are the same as in the first embodiment, so a description is omitted.

[0130] <Third Embodiment> The third embodiment of the sander 1B will be described using Figures 12 and 13. The main difference between the sander 1B of this embodiment and the sander 1 of the first embodiment is that the housing 20B of the sander body 10B does not house the controller 60, while the battery holster body 81B of the battery holster 80B houses the controller 60. As shown in Figure 13, the battery holster body 81B is formed to be larger in the vertical direction than the battery holster body 81 of the first embodiment, and houses the controller 60 above the battery mounting section 85. In this embodiment, the lead wires (power wires and signal wires) between the controller 60 housed in the battery holster body 81B and the motor 40 of the sander body 10B, and the signal wire that transmits the operation of the switch 65 to the controller are inserted into the cord body 73B.

[0131] In the third embodiment of the sander 1B, the battery 101 is installed in the battery mounting section 85 of the battery holster 80B. When the user turns on the switch 65 of the sander body 10B, the power from the battery 101 is controlled by the controller 60 housed in the battery holster body 81B and supplied to the motor 40 of the sander body 10B via the power cord 70B. The other configurations of the sander 1A are the same as those of the sander 1 in the first embodiment, so their description is omitted.

[0132] According to the third embodiment of the sander 1B described above, the battery holster 80B, which is connected to the sander body 10B by a power cord 70B, is equipped with a controller 60. Therefore, vibrations generated by the orbital motion of the polishing section 50 during polishing work can be suppressed from being transmitted to the controller 60.

[0133] Furthermore, since the controller 60 is not housed in the housing 20 of the sander body 10B, the sander body 10B can be made more compact.

[0134] The third embodiment of the sander 1B has the same configuration as the first embodiment of the sander 1, except that the battery holster 80B is equipped with a controller 60. Therefore, the third embodiment of the sander 1B also produces the same effects as the first embodiment.

[0135] <Fourth Embodiment> The fourth embodiment of the sander 1C will be described using Figure 14. In this embodiment, a hose 201 is attached to the rear end 391 of the dust collection nozzle 39, and the sander body 10 is connected to the cleaner 200 via the hose 201. In this embodiment, the battery holster 80C is equipped with a mounting portion 81C to which the battery holster can be attached to the cleaner 200. The mounting portion 81C may be, for example, a hook that can engage with the cleaner 200. Dust generated during the polishing work is sucked (stored) into the cleaner 200 via the hose 201 by operating the cleaner 200. The cord body 73 and the hose 201 are bound together with a band 205. The length of the cord body 73 is preferably 2.0 m or more. Also, the length of the cord body 73 is preferably 6.0 m or less. With this configuration, it is possible to suppress the cord body 73 from being pulled between the sander body 10 and the cleaner 200, and to prevent the cord body 73 from interfering with the polishing work. Therefore, the operability of the Sander 1C can be improved.

[0136] <Correspondence> The correspondence between each component of the above embodiment and each component of the technology disclosed herein is shown below. However, each component of the embodiment is merely an example and does not limit the components of the technology disclosed herein. Sander 1, 1A, 1B, and 1C are examples of "portable polishing machines". Sander bodies 10, 10A, and 10B are examples of "polishing machine bodies". Power cords 70 and 70B are examples of "power cords". Motor 40 is an example of a "motor". Main housing 21, housing 20, and 20B are examples of "main housings". Polishing sections 50 and 50A are examples of "polishing sections". Battery 101 is an example of a "battery". The battery mounting section 85 is an example of a "battery mounting section". Battery holsters 80, 80B, and 80C are examples of "battery holsters". The cord bodies 73 and 73B, and the power cords 70 and 70B are examples of "power cords". The first connector 71 and the second connector 53 are examples of the "first connector" and the "second connector," respectively. The upper end portion 23 is an example of an "upper end portion". The main gripping part 25 is an example of a "main gripping part". The handle portion 30 is an example of an "auxiliary gripping portion". The dust collection nozzle 39 is an example of a "dust collection nozzle". The second end portion 32 is an example of the "end portion that moves away from the main gripping portion." Controller 60 is an example of a "controller". The rear end portion 391 is an example of a "rear end portion". The dust collection pack 105 is an example of a "dust collection container". The rear end 112 is an example of the "rear end of a dust collection container". The battery holster side connection part 87 is an example of a "connection part to the power cord in the battery holster". One end 72 of the power cords 70 and 70B is an example of "the lower end of the power cord when the power cord is extended downwards." Polishing pads 51 and 51A are examples of "polishing pads". Code bodies 73 and 73B are examples of "code bodies". Cover 76 is an example of a "cover". Axis A2 is an example of an "axis that passes through the center of the cover". Tangent line A3 is an example of a "tangent line". The first virtual plane P1 and the second virtual plane P2 are examples of the "first virtual plane" and the "second virtual plane," respectively. Hook 86 is an example of a "hook". Mounting portion 81C is an example of a "mounting portion". Cleaner 200 is an example of a "suction device". Hose 201 is an example of a "hose".

[0137] <Other Embodiments> The first connector 71 of the power cords 70 and 70B may be permanently connected to the sander bodies 10, 10A, and 10B. Alternatively, the power cords 70 and 70B may have a connector on one end 72, and the connector may be configured to be detachable from the battery holsters 80 and 80B.

[0138] The shapes of the housings 20 and 20B of the sander bodies 10, 10A, and 10B are not limited to those of the above embodiment. For example, the housings 20 and 20B do not need to have a handle portion 30.

[0139] The second connector 53 may be provided at other locations on the housings 20 and 20B. For example, it may be provided at the first end 31 of the handle portion 30 or at the rear of the controller housing portion 35.

[0140] The battery holsters 80 and 80B may be equipped with other attachment points, such as a belt, for attaching the battery holsters 80 and 80B to the user, in place of or in addition to the hook 86.

[0141] In the above-described embodiment, the rotation axis A1 of the motor 40 was also the drive axis of the polishing units 50 and 50A. However, the rotation axis A1 of the motor 40 and the drive axis of the polishing units 50 and 50A do not necessarily have to coincide. For example, the motor shaft may be arranged in the front-rear direction, and the drive shaft of the polishing unit may be arranged in the up-down direction, and the rotational power of the motor may be transmitted to the drive shaft of the polishing unit by a known transmission mechanism.

[0142] The above-described embodiment is applicable to other portable polishing machines in which the polishing section is configured to perform orbital motion. For example, it is applicable to polishers and the like.

[0143] This disclosure is not limited to the embodiments described above, and can be implemented in various configurations without departing from its spirit. For example, the technical features in the embodiments corresponding to the technical features in each form described in the summary of the invention can be replaced or combined as appropriate in order to solve some or all of the above-described problems, or to achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be deleted as appropriate. [Explanation of symbols]

[0144] 1, 1A, 1B, 1C: Sander, 10, 10A, 10B: Sander body, 20: Housing, 21: Body housing, 22: Middle section, 23: Upper end, 24: Lower end, 25: Main gripping section, 30: Handle section, 31: First end, 32: Second end, 34: Inclined wall, 35: Controller housing, 36: Adapter housing, 38: Through hole, 39: Dust collection nozzle, 40: Motor, 41: Motor body, 42: Motor shaft, 44, 45, 48: Bearings, 46: Bolt, 47: Fan, 49: Bearing box S, 49A: Bearing box, 50: Polishing section, 50A: Polishing section, 51: Polishing pad, 51A: Polishing pad, 53: Second connector, 54: Terminal section, 55: Cylinder wall, 56: Bolt, 60: Controller, 61: Wireless communication adapter, 65: Switch, 70: Power cord, 70B: Power cord, 71: First connector, 72: One end, 73: Cord body, 73B: Cord body, 74: Terminal section, 75: Engaging section, 76: Cover, 80, 80B, 80C: Battery holster, 81, 81B: Battery holster body Part, 81C: Mounting part, 85: Battery mounting part, 86: Hook, 87: Battery holster side connection part, 101: Battery, 105: Dust collection pack, 481A, 482A: Bearing, 200: Cleaner, 201: Hose, 205: Band, 81C: Mounting part, A1: Rotation axis, A2: Axis, A3: Tangent, P1: First virtual plane, P2: Second virtual plane, P3: Third virtual plane, P4: Fourth virtual plane, P5: Fifth virtual plane, R1: Angle between the first virtual plane and the axis of the cover, R2: Angle between the first virtual plane (third virtual plane) and R3: Angle with the top surface of the dust collection pack, R4: Angle between axis A2 and tangent A3, C1: Angle between the first virtual plane and the second virtual plane, C2: Center point of the dust collection pack in the front-to-back direction, C3: Center point of the controller in the front-to-back direction, L1: Total length of the dust collection pack, L2: Overlap length of the cover with respect to the dust collection pack, L3: Total length of the sander body, L4: Distance from equilibrium point C1 to center point C2, L5: Distance from equilibrium point C1 to rotation axis A1, L6: Distance from equilibrium point C1 to center point C3

Claims

1. It is a portable polishing machine, A polishing machine body comprising a motor, a controller configured to control the rotation of the motor, a main body housing that houses the motor, a controller housing that houses the controller, and a polishing unit configured to perform orbital motion by the rotation of the motor, A battery holster equipped with a battery mounting section into which a battery can be attached, The system includes a power cord configured to supply power from the battery mounted in the battery mounting section to the polishing machine body, and to connect the polishing machine body and the battery holster without an intermediary housing. The upper end of the main housing is configured as a main gripping portion that can be grasped by the user. The rotating shaft of the motor extends in the vertical direction, and the polishing part is located below the main housing. When the main gripping portion and the motor are viewed from above the main gripping portion, the main gripping portion is positioned so as to overlap the motor, with the outer edge of the main gripping portion surrounding the outer edge of the motor. The controller housing is connected at one end to the main body housing and extends in a direction intersecting the rotation axis when the polishing machine body is viewed from above. The polishing machine body further comprises an auxiliary gripping portion connected to the main gripping portion and extending in a direction intersecting the rotation axis, At least a portion of the auxiliary gripping portion in its extending direction and at least a portion of the controller housing portion in its extending direction are spaced apart in the vertical direction. Portable polishing machine.

2. A portable polishing machine according to claim 1, The polishing machine body is provided with a dust collection nozzle located below the auxiliary gripping portion in the vertical direction, and configured to discharge dust generated when the polishing portion polishes the workpiece. A portable polishing machine in which, when viewed from above the auxiliary gripping portion in the vertical direction, the dust collection nozzle is positioned to overlap with the auxiliary gripping portion.

3. A portable polishing machine according to claim 2, When the extension direction of the auxiliary gripping portion is defined as the front-rear direction, and the side of the auxiliary gripping portion that connects to the main gripping portion is defined as the front side and the opposite side as the rear side, the rear end of the dust collection nozzle is configured to be detachably fitted with a dust collection container capable of storing the dust. The polishing machine body is configured such that, with the dust collection container attached to its rear end, its mass in the front-rear direction balances at a predetermined equilibrium point. The balance point is a portable polishing machine provided on the auxiliary gripping part.

4. A portable polishing machine according to claim 3, A portable polishing machine, wherein the polishing machine body is configured such that the distance between the midpoint of the length of the dust collection container in the front-to-back direction and the balance point is 0.150 m or more and 0.200 m or less.

5. A portable polishing machine according to claim 3, The polishing machine body is configured such that the distance between the rotating shaft of the motor and the balance point is 0.040 m or more and 0.100 m or less, making it a portable polishing machine.

6. A portable polishing machine according to claim 3, The portable polishing machine is configured such that the moment of mass from the equilibrium point to the rotation shaft of the motor is 0.20 Nm or more and 0.50 Nm or less.

7. A portable polishing machine, A polishing machine body comprising a motor, a controller configured to control the rotation of the motor, a main body housing that houses the motor, a controller housing that houses the controller, and a polishing unit configured to perform orbital motion by the rotation of the motor, A battery holster equipped with a battery mounting section into which a battery can be attached, The system includes a power cord configured to supply power from the battery mounted in the battery mounting section to the polishing machine body, and to connect the polishing machine body and the battery holster without an intermediary housing. The upper end of the main housing is configured as a main gripping portion that can be grasped by the user. The rotating shaft of the motor extends in the vertical direction, and the polishing part is located below the main housing. When the main gripping portion and the motor are viewed from above the main gripping portion, the main gripping portion is positioned so as to overlap the motor, with the outer edge of the main gripping portion surrounding the outer edge of the motor. The controller housing is connected at one end to the main body housing and extends in a direction intersecting the rotation axis when the polishing machine body is viewed from above. The polishing machine body further comprises an auxiliary gripping portion connected to the main gripping portion and extending in a direction intersecting the rotation axis, The controller housing is positioned below the auxiliary gripping portion and overlapping it when viewed from above, A portable polishing machine wherein, in the left-right direction intersecting the vertical direction and the extension direction of the auxiliary gripping portion, the width of the controller housing is wider than the width of the auxiliary gripping portion.

8. A portable polishing machine, A polishing machine body comprising a motor, a controller configured to control the rotation of the motor, a main body housing that houses the motor, a controller housing that houses the controller, and a polishing unit configured to perform orbital motion by the rotation of the motor, A battery holster equipped with a battery mounting section into which a battery can be attached, The system includes a power cord configured to supply power from the battery mounted in the battery mounting section to the polishing machine body, and to connect the polishing machine body and the battery holster without an intermediary housing. The upper end of the main housing is configured as a main gripping portion that can be grasped by the user. The rotating shaft of the motor extends in the vertical direction, and the polishing part is located below the main housing. When the main gripping portion and the motor are viewed from above the main gripping portion, the main gripping portion is positioned so as to overlap the motor, with the outer edge of the main gripping portion surrounding the outer edge of the motor. The controller housing is connected at one end to the main body housing and extends in a direction intersecting the rotation axis when the polishing machine body is viewed from above. The polishing machine body further, A dust collection fan is housed in the lower part of the main housing, It comprises an auxiliary gripping portion connected to the main gripping portion and extending in a direction intersecting the rotation axis, The controller is positioned between the dust collection fan and the auxiliary gripping part in the vertical direction, in a portable polishing machine.

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