WO2006134742A1

WO2006134742A1 - Hand-held polishing device

Info

Publication number: WO2006134742A1
Application number: PCT/JP2006/309693
Authority: WO
Inventors: Akinobu Kajimoto
Original assignee: Kuken Co., Ltd.
Priority date: 2005-06-14
Filing date: 2006-05-16
Publication date: 2006-12-21
Also published as: TW200709890A; JP2006346773A

Abstract

A hand-held polishing device enabling the free change of the position of a grip part relative to a polishing action part without impairing the adjusted state of its rotating balance by a balancer and having excellent operability. In the hand-held polishing device (1a), the grip part (22) is formed to be rotatable around a drive shaft (4) while maintaining its distance from the polishing action part (3) in the direction of the drive shaft and to be stopped at a rotation stop position and comprises a grip part rotation suppressing structure capable of suppressing the rotation of the grip part at the rotation stop position when its rotating force around the drive shaft is equal to or less than a rotating force expected to be applied to the grip part in polishing operation.

Description

Specification

Hand-held polishing equipment

Technical field

[0001] The present invention relates to a hand-held polishing apparatus.

Background art

[0002] For example, as a hand-held polishing apparatus for polishing a painted surface of a car body of an automobile, a drive shaft that is rotationally driven by an air motor, an electric motor, and the like, and a drive shaft that is eccentric with respect to the drive shaft. A driving transmission shaft to which the driving force of the shaft is transmitted, a polishing action portion that is driven by the driving force of the driving shaft transmitted through the driving transmission shaft, a driving shaft and a driving transmission shaft provided on the driving shaft; And a housing having a handle portion that covers at least the drive shaft and rotatably supports the drive shaft and extends in a direction intersecting the drive shaft. Hand-held polishing devices such as straight sanders, double-axes sanders and orbital sanders are already on the market (for example, see Patent Documents 1 and 2).

[0003] By the way, in the conventional hand-held polishing apparatus, the position of the handle portion is fixed with respect to the polishing action portion. Therefore, when the work space is narrow, the work position is very close to the foot, etc. There is a problem that it is difficult.

[0004] Therefore, if the inventor of the present invention uses a hand-held polishing device in which the handle is rotatable around the drive shaft, the work can be performed even when the work space is narrow or the work position is near the foot. The straight sander 10 as shown in FIGS. 10 to 12 was produced.

That is, the straight sander 10 is provided with a housing 2 and a polishing action part 3. The woozing 2 is provided with a sledge, a slidable body 21 and a handle part 22.

[0005] The drive shaft 4 is built in the housing main body 21, and is rotatably supported by bearings 41 and 42.

The drive shaft 4 has an air compressor (Fig. The bevel gear 52 provided at the front end of the motor shaft 51 is rotated by being supplied with compressed air through a compressed air supply path 221 provided at the rear end of the handle 22 from a not shown). The rotating force is transmitted by the bevel gear 43 fixed to the drive shaft 4 and rotates.

[0006] The balancer 7 is fixed to the lower end of the drive shaft 4 by a set bolt 71, and the drive transmission shaft 8 is eccentric with respect to the central axis of the drive shaft 4 at a bearing 72 provided on the balancer 7. It is supported in a freely rotatable manner.

One end of a link member 81 is pivotally supported on the drive transmission shaft 8.

[0007] The housing body 21 includes a head housing 23, a lock adjustment housing 24, a connecting member 25, and a base 26.

The head housing 23 is an approximate fit in which the upper end of the drive shaft 4 and the tip of the motor shaft 51 are fitted.

It has an L-shaped cylindrical shape, and the upper end portion of the connecting member 25 is screwed to the lower end portion thereof.

[0008] The connecting member 25 includes a flange portion 251 at the lower end, and a plurality of locking claws 252 having a substantially rectangular cross section are formed on the upper surface of the flange portion 251 in a radial pattern.

[0009] The base 26 includes a base body 261 and leg portions 262 extending downward at both ends in the longitudinal direction of the base body 261.

The base body 261 includes a through hole 263 that faces the lower end of the drive shaft 4 and two screw holes 265 that allow the auxiliary handle 264 to be attached and detached.

[0010] The through-hole 263 has an enlarged diameter portion 2 whose upper end is large enough to fit the flange portion 251 of the connecting member 25.

66 is formed. The diameter-expanded portion 266 has a stepped diameter compared to the lower end portion of the through-hole 263, and a disc spring 268 is fitted therein.

[0011] The leg portion 262 has a substantially cylindrical shape, and is fixed to the base body 261 in a state where the upper opening is closed by the base body 261, and is parallel to the sliding direction of the polishing action part 3 inside. A guide bar 269 that slidably supports a guide member 33 to be described later is provided.

[0012] The lock adjustment housing 24 has a flange portion 241 at the lower end, has a cylindrical shape in which the lower end portion of the head housing 23 is rotatably fitted, and is connected to the lower end surface of the flange portion 241 by the connecting member 25. The engaging grooves 242 into which the engaging claws 252 are fitted are formed in the same number as the engaging claws 252 and radially at the same pitch. An O-ring 245 that hermetically seals between the lock adjust housing 24 and the head housing 23 is fitted to the upper end inside the cylinder of the lock adjust housing 24.

The lock adjustment housing 24 is fixed to the upper surface of the base 26 by a machine screw 244.

[0014] The polishing portion 3 includes a polishing portion main body 31 having a substantially rectangular shape in plan view, and a polishing material that can be attached to and detached from the lower surface, which is a polishing surface of the polishing portion main body 31, with planar fastener glue or the like. And with a sandpaper 32!

The polishing member main body 31 has a guide member 33 fixed to a portion corresponding to the leg 262 on the upper surface by a small screw 34.

[0015] The guide member 33 includes a guide claw 331 that rises so as to guide both side surfaces of the leg 262, and a guide protrusion 332 that faces the leg 262 and has a through hole into which the guide bar 269 is slidably fitted. And.

Further, the other end of the link member 81 is pivotally supported on the upper surface of the polishing action part main body 31.

[0016] The straight sander 10 is configured as described above. When the head housing 23 is pressed toward the polishing action part 3, the disc spring 268 has a flange part 251 and a base body 26 as shown in FIG. 1, the head housing 23, the connecting member 25, the drive shaft 4, the balancer 7, and the drive transmission shaft 8 are pushed into the polishing action portion 3 side to the engagement groove 242 of the locking claw 252. Will be released. Next, if the head housing 23 is rotated in a state where the pushed-in state is maintained, the grip portion 22 rotates around the drive shaft 4. Then, when the handle 22 is rotated to a desired position and the pressure is released, the head housing 23, the connecting member 25, the drive shaft 4, the nolancer 7 and the drive transmission shaft 8 are restored to the original by the biasing force of the disc spring 268. While returning to the position, the engaging claw 252 is engaged with the engaging groove 242 and the handle 22 is fixed at the desired rotated position.

That is, according to the straight sander 10, the handle portion 22 is rotated around the drive shaft 4, so that the handle portion 22 can be freely moved by the rotation of the handle portion 22. Can be fixed. Therefore, even if the operator does not take an unreasonable posture, the polishing work can be performed, and workability is improved.

[0018] However, in the case of this straight sander 10, the engagement between the locking claw 252 and the engagement groove 242 is not achieved. The structure is such that once the force is released and the handle 22 is rotated around the drive shaft 4, the head claw 252 and the connecting member 25, The drive shaft 4, balancer 7 and drive transmission shaft 8 must be pushed into the polishing section 3 side. Therefore, an unnecessary force is applied to the drive transmission shaft 8 and the link member 81 pivotally supported by the drive transmission shaft 8, and the bearing 72 and the link member 8 that rotatably support the drive transmission shaft 8 are provided. It was found that this could cause damage early, or cause the vibration of the drive shaft 4 to lose its rotational balance and cause significant vibration during driving.

[0019] Patent Document 1: Japanese Utility Model Publication No. 6-34929

Patent Document 2: Japanese Patent Laid-Open No. 8-155810

Disclosure of the invention

[0020] In view of the above circumstances, the present invention provides a hand-held polishing apparatus that can freely change the position of the handle portion with respect to the polishing action portion that impairs the state of adjustment of the rotational balance by the NORANCER and is excellent in operability. For the purpose of doing!

[0021] In order to achieve the above object, a hand-held polishing apparatus according to the present invention is provided with a drive shaft that is rotationally driven by power and a state that is eccentric with respect to the drive shaft, and the drive force of the drive shaft is Due to the drive transmission shaft being transmitted, the polishing action portion that is driven by the drive force of the drive shaft being transmitted through the drive transmission shaft, and the eccentricity of the drive shaft and the drive transmission shaft provided on the drive shaft In a hand-held polishing apparatus comprising: a balancer that suppresses drive shaft blur; and a housing that covers at least the drive shaft and rotatably supports the drive shaft, and has a handle portion extending in a direction intersecting the drive shaft. The handle portion is formed to be rotatable around the drive shaft and stop at the rotation stop position while maintaining a constant distance in the drive shaft direction with respect to the polishing action portion, and is expected to be added to the handle portion during polishing work. The The following rotational force around shaft drive that, the grip portion includes a rotation inhibiting possible grip rotation inhibiting structure at a rotational stop position, as characterized Rukoto, Ru.

[0022] The hand-held polishing apparatus of the present invention may be of a compressed air drive type, an electric (direct current, alternating current) drive type, or an engine drive type! /.

In addition, although not particularly limited, for example, a double action sander, an orbital sander, a straight sander, etc. can be mentioned. But it ’s okay. A grinder that uses a grindstone may be used.

[0023] The polishing action part is driven so as to polish the object to be polished while bringing the polishing surface into contact with the object to be polished, and its shape is not particularly limited. In addition to an elliptical surface and a rectangular cross section, the polishing surface that comes into contact with the object to be polished may be arcuate, or may be convex or concave such that the corners of the side surface and the bottom surface are chamfered. Absent.

The polishing part is normally provided with a polishing material such as a sand taper or a puff so as to be detachable with a surface fastener glue or the like on the polishing surface of the polishing part main body. The polishing action part may be formed of a grindstone.

[0024] As described above, the hand-held polishing apparatus according to the present invention has the handle portion that rotates about the drive shaft. Therefore, the handle portion can be freely moved by the rotation of the handle portion so as not to interfere with the work. Can be moved. In addition, since the grip portion rotation restraining structure is provided, the position of the grip portion is not displaced during the polishing operation. Therefore, even if the worker does not take an unreasonable posture, the polishing work can be performed, and workability is improved. In addition, since the head housing, connecting member, drive shaft, balancer, and drive transmission shaft do not have to be pushed into the polishing portion, the grip portion keeps the distance in the drive shaft direction from the polishing portion constant. It can rotate around the drive axis. Therefore, it is possible to prevent early damage and large vibrations from occurring.

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing a first embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

FIG. 2 is an enlarged view of the main part of FIG.

FIG. 3 is a cross-sectional view taken along line XX in FIG.

FIG. 4 is a reference diagram of the usage state of the straight sander of FIG.

FIG. 5 is a cross-sectional view showing a second embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

FIG. 6 is a cross-sectional view showing a third embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention. FIG. 7 is a cross-sectional view showing a fourth embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

FIG. 8 is a cross-sectional view showing a fifth embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

FIG. 9 is a sectional view showing a first embodiment of an orbital sander which is a hand-held polishing apparatus according to the present invention.

FIG. 10 is a cross-sectional view showing a hand-held polishing apparatus previously proposed by the inventors of the present invention.

11 is a cross-sectional view showing a state in which the head housing of the polishing apparatus in FIG. 10 is pressed toward the polishing action portion side.

FIG. 12 is a view in the Y direction of the polishing apparatus of FIG.

Explanation of symbols

[0026] la, lb, lc, Id, le Straight sander (hand-held polishing equipment)

If orbital sander (hand-held polishing machine)

2, 2f housing

3, 3f Polishing action part

4, 4f Drive shaft

5, 5f Air motor

7, 7f Balancer

8, 8f Drive transmission shaft

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.

1 to 4 show a first embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

As shown in FIGS. 1 to 3, the straight sander la has a structure similar to that of the straight sander 10 described above, except for the structure described in detail below. Therefore, in FIG. 1, the same reference numerals as those of the straight sander 10 are given to portions that are not changed from the straight sander 10 described above. The same applies to other embodiments described below.

That is, the straight sander la has a connecting member 25a as shown in FIG. 1 and FIG. As shown in FIG. 3, 24 positioning recesses 253 into which steel balls 93 to be described later are fitted are radially formed at equal pitches on the upper surface of the flange portion 251 provided at the lower end portion. A steel ball holding plate 9 is provided above the flange portion 251 of the connecting member 25a.

The steel ball holding plate 9 includes a disk part 91 and two engaging convex parts 92 that protrude outward from the disk part 91 symmetrically with respect to the central axis of the disk part 91.

In the disk portion 91, six steel ball holding holes 91a are formed at equal pitches in the circumferential direction.

The steel balls 93 are inserted into the respective steel ball holding holes 91a.

An urging force transmission member 94 is provided on the steel ball holding plate 9.

The lock adjustment housing 24a has a head housing through hole 243 having a diameter substantially equal to or slightly larger than the outer diameter of the head housing 23a at the upper end, and a flange portion 241 at the lower end.

The cylindrical shape is larger than the outer diameter of the head housing 23a.

[0032] The head housing through hole 243 is fitted with an O-ring 245 that hermetically seals between the head housing 23a and the head housing 23a.

The flange portion 241 is fixed to the upper surface of the base 26 by a machine screw 244, and the two support plate locking recesses 246 sandwich the center between the locking protrusion 92 of the steel ball holding plate 9 and the lower surface thereof. It is drilled symmetrically.

[0033] Then, the lock adjust housing 24a is provided with a coil spring S1 for biasing the steel ball 93 toward the collar portion 251 via the ring-shaped biasing force transmitting member 94.

It is incorporated in the gap with the lower end of 3a, and is fixed to the upper surface of the base 26 by a machine screw 244 in a state where the engaging convex portion 92 is engaged with the support plate engaging concave portion 246.

[0034] As described above, this straight sander la has Steino Lebonore 93, Coinole Spring S

It is always urged toward the collar 251 by the urging force of 1. Accordingly, a part of the pressed steel ball 93 enters the positioning recess 253 of the collar portion 251 and rotation of the head housing 23a and the handle portion 22 around the drive shaft 4 is suppressed.

The coil spring S1 is adjusted to a biasing force that does not release the engagement of the steel ball 93 into the positioning recess 253 below the rotational force around the drive shaft 4 that is expected to be applied to the handle during polishing. Te! [0035] On the other hand, when the handle portion 22 is held by hand and an attempt is made to rotate around the drive shaft 4 with a force greater than the urging force of the coil spring S1, the steel ball 93 passes through the urging force transmission member 94 to the coil spring S1. Is retracted to the head housing 23a side and rides on the upper surface of the flange portion 251 between the two positioning recesses 253 adjacent to the flange portion 251, and the positioning is released. Then, for example, as shown in FIG. 4 (a), from the position where the shaft of the handle portion 22 coincides with the longitudinal direction of the polishing action portion 3, the shaft of the handle portion 22 is polished as shown in FIG. 4 (b). Predetermined in units of 15 °, such as a position rotated 30 ° from the longitudinal direction of the action part 3 and a position where the shaft of the handle part 22 is rotated 60 ° from the longitudinal direction of the polishing action part 3 as shown in FIG. 4 (c). When the handle portion 22 is rotated to the position, the steel ball 93 enters the corresponding positioning recess 253 again by the biasing force of the coil spring S1, and the handle portion 22 is prevented from rotating.

[0036] As described above, according to this straight sander la, the handle portion 22 is self-rotating around the drive shaft 4. Therefore, the handle portion 22 can be freely operated by the rotation of the handle portion 22. Can be in position. Since the grip part rotation restraining structure is provided with the steel ball 93 biased by the coil spring S1 and the positioning recess 253, the steel biased by the coil spring S1 at the rotation stop position of the grip part 22 is also provided. The ball 93 enters the positioning recess 253 to position the handle 22, and the steel ball 93 is positioned to the positioning recess 253 below the rotational force around the drive shaft 4 that is expected to be applied to the handle 22 during polishing. It is possible to prevent the rotation of the grip portion 22 while maintaining the intrusion state. In other words, the polishing operation can be performed even if the gripper 22 does not rotate around the drive shaft 4 during the polishing operation without taking an unreasonable posture. The angle between the shaft of the grip portion 22 and the longitudinal direction of the polishing action portion 3 can be maintained even during the polishing operation, so that the workability is improved.

[0037] Further, since the coil spring S1 between the head housing 23a and the lock adjustment housing 24a only expands and contracts, when the handle portion 22 is rotated, the drive shaft of the handle portion 22 and the polishing action portion 3 is driven. The distance in the four directions can always be kept constant. Therefore, even if the handle portion 22 is rotated around the drive shaft 4, no unnecessary force is applied to the drive transmission shaft 8 or the link member 81 pivotally supported on the drive transmission shaft 8 or the balance member 81 is distorted. Therefore, a stable polishing operation with less vibration can be maintained for a long time. FIG. 5 shows a second embodiment of a straight sander that is a hand-held polishing apparatus that is useful in the present invention.

As shown in Fig. 5, this straight sander lb has a flat upper surface of the flange portion 251 of the connecting member 25b and 24 positioning recesses 231 (2 in Fig. 5) at the same height of the outer peripheral surface of the lower end of the head housing 23b. In this example, six spring support holes 247 are formed at equal pitches on the inner peripheral surface of the lock adjustment housing 24b at the same height as the positioning recess 231. Then, each spring support hole 247 is fitted with a spring S2 having a steel ball 93 at the tip, and a part of the steel ball 93 enters the positioning recess 231 by the urging force of the spring S2. It is the same as the straight sander la described above except that it has a grip portion rotation restraining structure comprising a steel ball 93 urged by and a positioning recess 231.

[0039] Fig. 6 shows a third embodiment of a straight sander which is a hand-held polishing apparatus useful for the present invention.

As shown in FIG. 6, this straight sander lc is urged by the urging force of the coil spring S 1 instead of the grip portion rotation restraining structure comprising the steel ball 93 urged by the coil spring S1 and the positioning recess 253. The straight sander la is the same as that of the straight sander la except that the handle portion rotation restraining structure having the biased upper saw blade portion 951 and the lower saw blade portion 256 is employed.

That is, in this straight sander lc, instead of the positioning recess 253 on the upper surface of the connecting member 25c, an engagement protrusion 256a having the same shape of an isosceles triangle is continuously arranged in a saw-tooth shape over the entire upper end of the cylinder. A side saw blade portion 256 is formed, and an engaging convex portion 952 that meshes between two adjacent engaging convex portions 256a of the lower saw blade portion 256 on the lower surface of the urging force transmission member 95 is a continuous saw blade shape. The upper saw blade portion 951 is formed in a row.

[0040] The straight sander lc has two engaging convex portions 256a in which each engaging convex portion 952 of the urging force transmitting member 95 is adjacent to the lower saw blade portion 256 by the urging force of the coil spring S1. And the handle 22 is prevented from rotating. Further, when the handle portion 22 is held by hand and a rotational force is applied around the drive shaft 4, the biasing force of the coil spring S1 is resisted by the taper of the side wall relative to the rotational direction of the engaging convex portion 256a and the engaging convex portion 952. The upper saw blade 951 The engaging projections 952 are pushed up toward the head housing 23a, the engaging projections 952 get over the engaging projections 256a, and the handle 22 rotates around the drive shaft 4.

[0041] Fig. 7 shows a fourth embodiment of a straight sander which is a hand-held polishing apparatus useful for the present invention.

As shown in FIG. 7, this straight sander Id is a frictional force urged by the coil spring S1 in place of a grip portion rotation restraining structure comprising a steel ball 93 urged by the coil spring S1 and a positioning recess 253. The straight sander la has the same structure as the straight sander la except that it has a grip rotation prevention structure made of a resistance material 961.

That is, in this straight sander Id, the upper surface of the flange portion 251 of the connecting member 25b is flat, and the ring-shaped frictional resistance material 961 is formed on the lower surface of the urging force transmission member 96. Since the material 961 is always pressed against the upper surface of the flange portion 251 by the urging force of the coil spring S1, the frictional resistance generated between the friction resistance material 961 and the flange portion 251 causes the friction during the polishing operation by the straight sander Id. The rotational force around the drive shaft 4 applied to the handle portion 22 caused by vibration or the like suppresses rotation of the handle portion 22 and the head housing 23a around the drive shaft 4, and the desired rotation with the handle portion 22 held by hand. When a rotational force of a predetermined value or more is applied in the direction, the handle portion 22 and the head housing 23a rotate around the drive shaft 4.

[0043] Since the straight sander Id is prevented from rotating by the frictional resistance of the frictional resistance material 961, the rotation stop position of the grip portion 22 can be selected in a stepless manner, thereby improving the workability.

The material of the friction resistance material is not particularly limited. For example, a general rubber material, an inorganic fiber such as a metal fiber, an organic fiber, a carbon fiber, a glass fiber or the like as a friction fiber base material is made of rubber, resin, or the like. Examples include molded products obtained by mixing with a binder, sintered metal friction materials, and the like.

[0044] FIG. 8 shows a fifth embodiment of a straight sander which is a hand-held polishing apparatus according to the present invention.

As shown in FIG. 8, this straight sander le has a grip portion rotation restraining structure made of a friction resistance material 961 using compressed air as a biasing means instead of the coil spring S1. Except for V and Ru, follow the same procedure as for Straight Sander Id above!

In other words, this straight sander le is used to send compressed air from the air compressor into the gap 29 between the head housing 23a and the lock adjusting housing 24e. The supply path 291 is provided, and a clearance 29 is formed between the portion facing the side surface of the urging force transmitting member 96e of the connecting member 25b and the lock adjusting housing 24e, and the portion facing the outer wall surface of the upper end portion of the connecting member 25b of the head housing 23a. O-rings 293, 294, 295 are provided to keep the inside airtight.

[0045] Then, the straight sander le opens the valve 292 and feeds compressed air into the gap 29 via the compressed air supply passage 291. The straight sander le causes frictional resistance via the biasing force transmission member 96e by the pressure of the compressed air. The material 961 is pressed against the upper surface of the collar 251 so that rotation can be suppressed by the frictional resistance of the frictional resistance material 961. If compressed air is extracted from the gap 29, the frictional resistance becomes weaker, and the handle 22 With the head housing 23a, the drive shaft 4 can be smoothly rotated.

FIG. 9 shows an embodiment of an orbital sander that is a hand-held polishing apparatus that is useful for the present invention.

As shown in FIG. 9, this orbital sander If has a head housing 23f and a handle 22f rotatably mounted around the drive shaft 4f, and has 24 positionings on the upper surface of the flange 2 51 of the connecting member 25f. Similar to the straight sander la described above, in which six steel balls 93 are urged by a plurality of stacked disc springs S 3 and recessed into the positioning recess 253 to prevent rotation. The handle part rotation prevention structure is provided. Other than these, it is the same as the conventional self-absorbing orbital sander.

[0047] In FIG. 9, 2f is a housing, 5f is an air motor, 8f is a drive transmission shaft directly connected to the lower end of the drive shaft in an eccentric state from the central axis of the drive shaft 4f, 7f is a balancer, and 221 is a compression An air supply path, 227 is a dust collecting nozzle, 39 is a cylindrical elastic member, 3f is a polishing action part, and E is an ejector. The arrow indicated by D is the flow of dust generated during the polishing operation.

[0048] The hand-held polishing apparatus according to the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the drive shaft and the drive transmission shaft are connected via a lancer. However, the drive transmission shaft may be directly rotatably supported at the lower end of the drive shaft. Further, the balancer may be provided at the center or upper end of the drive shaft not at the lower end of the drive shaft.

Claims

The scope of the claims

[1] A drive shaft that is rotationally driven by power, a drive transmission shaft that is provided in an eccentric state with respect to the drive shaft, to which the drive force of the drive shaft is transmitted, and the drive via the drive transmission shaft A polishing action section that is driven by transmission of the driving force of the shaft, a balancer that is provided on the driving shaft and suppresses blurring of the driving shaft due to eccentricity of the driving shaft and the driving transmission shaft, and covers at least the driving shaft and the driving shaft A hand-held polishing apparatus comprising a housing having a handle portion extending in a direction crossing the drive shaft,

The grip portion is formed so as to be rotatable around the drive shaft and capable of stopping at the rotation stop position while maintaining a constant distance in the drive shaft direction with respect to the polishing action portion, and when the handle portion is added to the handle portion during polishing work. A hand-held polishing apparatus comprising a handle portion rotation suppression structure capable of suppressing rotation of the handle portion at a rotation stop position below an expected rotational force around the drive shaft.

2. The hand-held polishing apparatus according to claim 1, wherein the power is compressed air.