JP3499024B2 - Multifunctional polishing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-functional polishing apparatus which can change the type of movement of a polishing member at any time to carry out polishing treatments having different actions with a single apparatus.

[0002]

2. Description of the Related Art A polishing device, particularly a hand-held polishing device, grinds a surface of an object having various three-dimensional spreads into a desired shape or polishes it to a desired roughness, for example, for finishing or repairing a car body outer plate. It is widely used because it can be easily operated for various tasks. In this type of polishing equipment,
The working surface is provided on the end face in the axial direction of the polishing member, the shaft of the polishing member is eccentrically arranged with respect to the drive shaft of the polishing device, and the working surface of the polishing member performs a predetermined rotary motion on one plane to perform the polishing action. The type that causes the is generally known as a highly efficient polishing apparatus.

In a polishing apparatus having such an eccentrically arranged polishing member, the shaft of the polishing member moves along a circular orbit centered on the drive shaft and having an eccentric distance as a radius (revolution). Supported by bearings that move. In this bearing, a first bearing ring is usually fixed to a balancing member having a counterweight portion and directly connected to a drive shaft, and a second bearing ring is fixed to a shaft of a polishing member. At this time, in a state where the second bearing ring can freely rotate with respect to the first bearing ring, the inertia of each mass portion such as the polishing member supported by the second bearing ring causes the first bearing ring to revolve at the same time as the second bearing ring rotates. The bearing ring and the polishing member rotate about the first bearing ring in the same direction as the revolution. A double-action type polishing device uses such an action to cause the polishing member to perform an orbital movement (so-called double action operation), which forcibly stops the rotation of the polishing member and causes the polishing member to revolve. An orbital polishing device is a device that performs only (so-called orbital operation). In the orbital polishing apparatus, the polishing member is connected to the apparatus body while being allowed to move eccentrically by the elastic member, and thus the second bearing ring of the polishing member and the bearing revolves with respect to the first bearing ring during the orbital operation. Rotate in the opposite direction.

The orbital type polishing apparatus has a relatively small amount of polishing because the polishing member only revolves around the drive shaft, and is generally used for finishing the surface of an object. On the other hand, in the double action type polishing apparatus, since the polishing member revolves around the drive shaft, the polishing amount is relatively large and it is used for roughing such as rough polishing and chamfering. Therefore, in general, the operator properly uses these different polishing devices according to the type of polishing work.

In order to eliminate the reduction in work efficiency and economy associated with the proper use of the polishing apparatus according to the type of processing, there is provided a multifunctional polishing apparatus capable of switching between orbital operation and double action operation of the polishing member at any time. User demands are high and some solutions have already been proposed. For example, in the polishing apparatus disclosed in Japanese Patent Application Laid-Open No. 60-135171, the annular restraining member for forcibly stopping the rotation of the polishing member is disengaged from the working position engaged with the polishing member and the polishing member. By moving it to the non-acting position, the orbital motion and the double action motion can be switched. However, JP-A-60-
In the polishing apparatus disclosed in Japanese Patent No. 135171, since a plurality of columns support a restraining member that locks the rotation of the polishing member, stress is likely to be concentrated on the connecting portion between the column and the polishing member when the rotation is locked, and the orbital. There was a risk that the connecting portion of the column, especially at the tip, was damaged during the operation in operation. Further, since the air cylinder device for moving the support column and the restraining member is mounted, there is a problem that the size and weight of the polishing device increase to an extent unsuitable for a hand-held device.

In order to solve such a problem, the applicant of the present application discloses in Japanese Patent Application No. 6-108618 as a prior application of the present application that the operation of a polishing member can be easily and accurately performed between an orbital operation and a double action operation. (EN) Provided is a multi-functional polishing apparatus which is switchable and has a switching mechanism having a simple structure and excellent durability, which can prevent an increase in size and weight of the apparatus as much as possible. A multifunctional polishing apparatus according to this prior application includes a main body, a drive unit that has a drive shaft and is supported by the main body, and is rotatably connected to the drive shaft at a position that is eccentric to the drive shaft. In a multi-function polishing apparatus including a polishing member that revolves around a drive shaft by operation, and an engaging unit that can selectively release and lock the rotating motion of the polishing member, the engaging unit is connected to the polishing member. A first part and a second part that rotates relative to the first part, the bearing means being concentrically arranged on the polishing member, the second part of the bearing means being fixedly coupled to the main body, An elastic coupling member which is fixed and is rotatably coupled to the polishing member via bearing means, and which elastically deforms in accordance with the revolution movement of the polishing member, and is disposed between the elastic coupling member and the polishing member. Only the second part of the means engages the polishing part An engaging member that moves between a first position that releases the rotation of the robot and a second position that locks the rotation by engaging both the second portion and the first portion. It is what

[0007]

In the multifunctional polishing apparatus according to the above-mentioned prior application, there is a concern that polishing powder may scatter around the apparatus during polishing work, which may adversely affect the operator's body and environment. Further, if the scattered polishing powder adheres to the surface to be polished which has been finished, there is a fear that the surface needs to be processed again.

Therefore, an object of the present invention is to prevent scattering of dust generated by polishing work around the apparatus in a multifunctional polishing apparatus capable of switching the operation of the polishing member between an orbital operation and a double action operation. An object is to provide a multifunctional polishing device that can eliminate adverse effects on the body and the environment.

[0009]

In order to solve the above-mentioned problems, the present invention provides a main body, a drive unit having a drive shaft and supported by the main body, and being rotatable at a position eccentric to the drive shaft. The engaging means includes an abrasive member that is connected to the drive shaft and that revolves around the drive shaft by the operation of the drive unit, and an engaging unit that can selectively release and lock the rotational motion of the abrasive member. Includes a bearing means concentrically arranged on the polishing member with a first portion connected to the polishing member and a second portion rotating relative to the first portion, and fixedly connected to the second portion of the bearing means. And an elastic connecting member which is fixed to the main body together with the elastic member and which is relatively rotatably connected to the polishing member via bearing means and elastically deforms in accordance with the revolution movement of the polishing member, and arranged between the elastic connecting member and the polishing member. And engages only the second part of the bearing means for polishing. A multifunctional polishing device comprising: a first position for releasing the rotational movement of the member and an engagement member that moves between a second position and a second position for engaging the both of the first portion and locking the rotational movement. Provided is a multi-function polishing apparatus, which is equipped with a dust suction unit that suctions and collects dust generated by a polishing operation to prevent the dust from scattering around the multi-function polishing apparatus.

According to one embodiment of the present invention, the dust suction means is provided with a hole extending between the polishing surface of the polishing member and the non-working surface on the opposite side thereof, and adjacent to the non-working surface of the polishing member. A dust passage consisting of a defined chamber and a duct communicating between the chamber and the dust collecting compartment outside the multifunctional polishing device, and suctioning and transporting dust along the dust passage from the polishing surface of the polishing member to the dust collecting compartment. A multi-function polishing apparatus is provided which has a suction mechanism and in which the engaging member is arranged outside the dust passage.

In this case, the bearing means comprises a bearing having a pair of bearing rings arranged side by side in the radial direction, and the first portion of the bearing means has a first bearing ring of the bearing and a position eccentric to the drive shaft. And an eccentric shaft that is rotatably coupled to the drive shaft and is fixed to the first bearing ring, the eccentric shaft having the rotation axis of the polishing member and coupled to the polishing member, and the second portion of the bearing means. And a second bearing ring of the bearing and an annular support member that surrounds the rotation axis of the polishing member and is fixed to the second bearing ring and the elastic coupling member, and the chamber of the dust collecting means is a non-operating surface of the polishing member. And an annular support member and a sag extending from the outer peripheral edge of the annular support member to the vicinity of the polishing member.

In such an arrangement, the engagement member is preferably located on the opposite side of the chamber with respect to the annular support member. Further, it is convenient that the engaging member moves between the first position and the second position in a direction orthogonal to the rotation axis of the polishing member. Further, the engagement member is configured to slide on the annular support member between a first position that engages only the annular support member and a second position that engages both the annular support member and the eccentric shaft. Are particularly advantageous.

[0013]

The dust suction means sucks and collects the dust generated by the polishing operation and prevents the dust from scattering around the multifunctional polishing apparatus. At this time, if the engaging member is arranged outside the dust passage, the dust is carried in the dust passage by the suction mechanism without contacting the engaging member. Therefore, malfunction of the engagement member due to accumulation of dust is avoided.

If the chamber of the dust passage is defined by the non-acting surface of the polishing member, the annular support member, and the sag extending from the outer peripheral edge of the annular support member to the vicinity of the polishing member, the chamber will rotate even when the polishing member rotates. Is reliably formed adjacent to the non-acting surface of the polishing member, and does not hinder the transport of dust. At this time, if the engaging member is arranged on the opposite side of the chamber with respect to the annular supporting member, the operator can easily approach the engaging member, which simplifies the operation, and the position of the engaging member can be confirmed at a glance. It

If the engaging member moves between the first position and the second position in the direction orthogonal to the rotation axis of the polishing member, the expansion of the axial dimension of the device corresponding to this moving distance is avoided. To be done. Therefore, the distance from the operator's hand to the working surface of the polishing member can be kept small, and the workability due to the arrangement of the engaging member can be prevented from deteriorating. Furthermore, if the engagement member is configured to slide on the annular support member between a first position that engages only the annular support member and a second position that engages both the annular support member and the eccentric shaft. The engaging member itself can be downsized and simplified.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on its preferred embodiments with reference to the accompanying drawings. In each drawing,
The same components are designated by common reference numerals. FIG. 1 shows a multifunction polishing apparatus 10 according to an embodiment of the present invention. The multifunctional polishing apparatus 10 has a main body 12 and a drive shaft 14, and the main body 1
2 and a polishing member 1 that is rotatably connected to the drive shaft 14 at a position eccentric to the drive shaft 16 and the drive unit 16.
8, an engaging means 20 capable of selectively releasing and locking the rotation of the polishing member 18, and a dust suction means 22 for sucking and collecting dust generated by the polishing operation.

The multi-function polishing apparatus 10 has a structure suitable for hand-held work, like the conventional polishing apparatus. For example, body 1
2 comprises a head 24 which an operator can hold, preferably with one hand. The drive unit 16 is a well-known air motor, and the motor housing is fixed to the inner recess 26 of the main body 12.
A lever 28 pivotally attached to the head 24 engages a valve 32 that opens and closes an air supply passage 30 provided in the main body 12. Lever 2
When 8 is pushed down, the valve 32 is opened, and compressed air is supplied to the drive unit 16 via the air supply passage 30. The main body 1
2 is provided with an air discharge path 34 for discharging the compressed air that has operated the drive unit 16.

At the output end of the drive shaft 14, the counterweight 3 is provided.
6 is formed. The counterweight portion 36 includes a cylindrical recess 38 that is eccentric to the drive shaft 14 below the drive shaft 14 by a distance d and extends in the axial direction.
0 is placed. The first bearing 40 is preferably a rolling bearing, and has a pair of bearing rings arranged side by side in the radial direction. In this embodiment, the outer ring 40a of the first bearing 40 is fixed to the recess 38 of the counterweight portion 36, and the eccentric shaft 42 that supports the polishing member 18 is fixed to the inner ring 40b. Therefore, the eccentric shaft 42 has an axis extending parallel to the axis of the drive shaft 14 and spaced from each other by a distance d, and is rotatably connected to the drive shaft 14 via the first bearing 40.

The polishing member 18 is a well-known member that can be used in a conventional hand-held polishing apparatus, and supports a pad portion 46 having a circular or rectangular working surface 44 for holding a polishing cloth and a pad portion 46. And a base portion 48 that operates. Polishing member 18
Is the polishing member 18 and the eccentric shaft 42 when the polishing device 10 is operated.
In order to prevent relative movement between the
Is firmly connected to the eccentric shaft 42. Further, the polishing member 18 can be properly removed or replaced when the apparatus is stopped.

The engaging means 20 is fixed to the second bearing 52 which is concentrically attached to the polishing member 18, and is fixed to the main body 12 and is rotatably connected to the polishing member 18 via the second bearing 52. Elastic connecting member 54 and elastic connecting member 54
And a polishing member 18, and a first position for releasing the rotation motion of the polishing member 18 and a second position for locking the rotation motion.
And an engagement member 56 that moves between the positions. The configuration of the engaging means 20 will be described in detail below with reference to FIGS.

In the illustrated embodiment, a male screw is formed on the outer peripheral portion of the eccentric shaft 42, and an outer cylinder 58 having a female screw is fixed to the eccentric shaft 42 by screwing both screws. The second bearing 52 constituting the bearing means of the present invention is preferably a rolling bearing, and has an inner ring 60 and an outer ring 62 juxtaposed in the radial direction. The inner ring 60 of the second bearing 52 is fixed to the outer cylinder 58 fixed to the eccentric shaft 42, and the outer ring 62 is arranged on a plane that concentrically surrounds the rotation axis of the polishing member 18 and is orthogonal to the rotation axis. It is fixed to the annular support member 64. Therefore, the inner ring 60, the outer cylinder 58, and the eccentric shaft 42 form the first part of the bearing means of the present invention, and the outer ring 62 and the annular support member 64 form the second part of the bearing means of the present invention. Further, the annular support member 64 has a sleeve portion 66 that fixedly supports the outer ring 62 of the second bearing 52 on the inner peripheral surface, and an elastic coupling member 54 that extends radially outward from one end of the sleeve portion 66.
And a flange portion 68 fixedly connected to the.

The elastic connection member 54 is composed of a plurality of drum-shaped elastic columns, and is fixed to the main body 12 at one end and to the annular support member 64 at the other end. The elastic connecting member 54 is preferably made of rubber and elastically deforms along with the revolution movement of the eccentric shaft 42 and the polishing member 18 (see FIG. 1). The elastic connecting member 54, the main body 12, and the annular supporting member 64 can be fixed by a well-known method such as bolting, bonding, and welding.

As shown in FIG. 2, the engagement member 56 is a plate having a keyhole-shaped through hole 70 in the center. Through hole 70
Is a pair of parallel straight edges 72 and the straight edges 72
Defined by a long arc edge 74 and a short arc edge 76 interconnecting the corresponding ends of the. The engagement member 56 is a straight line L connecting the center of the long arc edge 74 and the center of the short arc edge 76.
Is arranged so as to be orthogonal to the rotation axis of the polishing member 18,
It is slidably mounted on the surface of the annular support member 64 opposite the polishing member 18. At this time, the eccentric shaft 42 and the outer cylinder 58
Extend through the through hole 70. Further, the engaging member 56
Are elongated holes 7 extending parallel to the straight line L on both sides of the through hole 70.
8 and is attached to the annular support member 64 by bolts 80 that pass through the elongated holes 78. Therefore, the engaging member 56
Can slide on the annular support member 64 in parallel with the straight line L by the engagement of the slot 78 and the bolt 80.

The outer cylinder 58 fixed to the eccentric shaft 42 is a portion that engages with the through hole 70 of the engaging member 56, and has a radius slightly smaller than the long arc edge 74 of the through hole 70. Defined by a pair of opposing arcs and a pair of parallel straight lines spaced apart by a distance that is slightly less than the distance between the pair of straight edge portions 72 of the through-hole 70 and interconnecting the corresponding ends of the arcs. Has a cross-sectional shape. Therefore, as shown in FIG. 3, the engagement member 56 is moved on the annular support member 64 to dispose the outer cylinder 58 in the long arc edge portion 74 of the through hole 70 (that is, the arc of the cross section of the outer cylinder 58). The outer cylinder 58 can freely rotate in the through hole 70 without engaging with the engaging member 56 when the portion is closest to the long arc edge portion 74). As shown in FIG. 4, the engagement member 56 is moved on the annular support member 64 to arrange the outer cylinder 58 between the pair of straight edge portions 72 of the through hole 70 (that is, the cross section of the outer cylinder 58). When the straight portion is arranged along the straight edge portion 72), the outer cylinder 58 engages with the engaging member 56 and is restrained from rotating in the through hole 70.

Therefore, according to the engaging means 20, when the engaging member 56 is arranged in the first position (FIG. 3) where only the annular supporting member 64 is engaged, the eccentric shaft 42 and the polishing member 18 are free to rotate. Exercise can be performed, at which time the polishing apparatus 1
0 operates as a double action polishing machine. Further, when the engagement member 56 is arranged at the second position (FIG. 4) where it engages with both the annular support member 64 and the outer cylinder 58 of the eccentric shaft 42, the eccentric shaft 42 and the polishing member 18 are engaged members. The rotation motion is stopped by the action of the elastic connecting member 54 via 56, and at this time, the polishing apparatus 10 operates as an orbital polishing apparatus.

The engaging member 56 preferably includes a pair of ears 82 bent at substantially right angles at both ends in the longitudinal direction in order to facilitate movement of the engaging member 56 by an operator's hand. Moreover, small concave portions and convex portions are provided on both contact surfaces of the engaging member 56 and the annular supporting member 64, and when the engaging member 56 is arranged in the first position and the second position, these concave portions are formed. It is advantageous to have a structure in which the convex portion is engaged. Accordingly, it is possible to easily confirm by touch that the engagement member 56 is arranged at the first position or the second position. In addition, by forming the eccentric shaft 42, the second bearing 52, the engaging member 56, and the annular support member 64 from a lightweight and high mechanical strength material such as an aluminum alloy such as duralumin, hard plastic, or ceramic, The weight reduction of the polishing apparatus 10 is further promoted.

The polishing apparatus 10 is provided with a dust suction means 22 for sucking and collecting dust generated by the polishing operation. Dust collection means 2
2 includes a plurality of holes 84 extending between the working surface 44 of the polishing member 18 and the non-working surface on the opposite side, that is, the axial end surface of the base portion 48, and a chamber 86 defined adjacent to the base portion 48. A dust passage including an air discharge passage 34 that communicates the chamber 86 with a predetermined dust collecting section outside the multifunction polishing apparatus is provided. Chamber 86
Is a base portion 48, an annular support member 64, and a sag 88 extending from the outer peripheral edge of the annular support member 64 to the vicinity of the polishing member 18.
Defined by and. The droop 88 is a cylindrical member, preferably made of a flexible material such as rubber, the free end of which is arranged slightly away from the polishing member 18. Dripping 88
The interval between the free end of the polishing member 18 and the polishing member 18 is narrowed as much as possible so long as they do not interfere with each other when the polishing member 18 rotates. In addition, the sag 88 is caused by the adhesive or the fastening band.
4 or is integrally molded with the annular support member 64.

The annular support member 64 has an opening 9 at a predetermined position.
0 is formed. An opening 92 is formed in the main body 12 at a position corresponding to the opening 90. Between the annular support member 64 and the main body 12, there is arranged a tube 94 fixed at a position surrounding the openings 90 and 92 at both ends. Therefore room 8
6 and the air discharge passage 34 are communicated with each other through the opening 90, the opening 92, and the pipe 94 so that the fluid and the powder can flow. The tube 94 is made of a flexible material such as sponge or rubber, and can be deformed following the eccentric movement of the annular support member 64. The diameter of the opening 92 is preferably larger than the diameter of the opening 90 by at least twice the eccentric distance d of the eccentric shaft 42.

In the main body 12, the air discharge path 3 is provided from the opening 92.
A passage 96 extending to 4 is formed. The passage 96 is narrowed at the connection portion with the air discharge passage 34. Therefore, the compressed air supplied to the drive unit 16 is not supplied to the air discharge passage 34.
When the air is discharged through the passage 96, the inside of the passage 96 becomes a negative pressure, and the air in the chamber 86 is sucked into the air discharge passage 34 through the pipe 94 and the passage 96. Due to this sucking action, dust generated on the working surface 44 of the polishing member 18 is removed from the holes 84, the chamber 86,
It is sucked and conveyed to the air discharge passage 34 through the pipe 94 and the passage 96, and further carried out to the external dust collecting section. As is well known, the polishing cloth paper (not shown) attached to the working surface 44 of the polishing member 18 is also provided with holes corresponding to the holes 84.

Thus, in the polishing apparatus 10, the engaging member 5
6 is located on the opposite side of the chamber 86 with respect to the annular support member 64, i.e. outside the dust passage, so that the dust will be absorbed by the engagement member 5
It is transported in the dust passage without contacting the 6. Therefore, the risk of malfunction of the engagement member 56 due to the accumulation of dust is eliminated. Further, since the engaging member 56 can be easily approached from between the plurality of elastic connecting members 54, the operator can easily operate the engaging member 56, and the position of the engaging member 56, that is, the engaged state can be changed. There is an advantage that can be confirmed at a glance. Moreover, since the engagement member 56 can be formed of a thin plate and slides on the annular support member 64 in the direction orthogonal to the rotation axis of the polishing member 18, the distance from the operator's hand to the working surface 44 of the polishing member 18 can be reduced. It is shortened and workability is improved.

In the polishing apparatus of the present invention, the dust suction means can have various configurations other than the above. For example, in the above-described embodiment, the main body 12 is provided with a dust discharge passage independent of the air discharge passage 34, and the dust discharge passage is connected to an external suction device, so that the dust is sucked without utilizing the exhaust of the compressed air for driving. Can be transported. In this case, the drive unit 1
Other well-known drive mechanism such as an electric motor can be used as the motor 6.

In the polishing apparatus of the present invention, the engaging means can have various configurations other than the above. For example, in FIG.
As shown in FIG. 5, the engagement means is fixed to the second bearing 52 concentrically attached to the polishing member 18, and is fixed to the main body 12 and is rotatable relative to the polishing member 18 via the second bearing 52. Between the elastic connecting member 98 to be connected, a first position which is disposed between the elastic connecting member 98 and the polishing member 18, and which releases the rotation motion of the polishing member 18, and a second position which locks the rotation motion. An annular engaging member 1 that moves in parallel with the rotation axis
00 and. The structure of the polishing apparatus shown in FIG. 5 other than the engaging means is the same as that of the polishing apparatus 10 shown in FIG.

The second bearing 52 has an inner ring 60 fixed to the outer peripheral surface of the eccentric shaft 32, and an outer ring 62 fixed to the annular support member 102. The annular support member 102 supports the outer ring 62 of the bearing 52 on the inner peripheral surface thereof and the annular engaging member 100 on the outer peripheral surface thereof, and a flange portion extending radially outward from one end of the sleeve portion 104. And 106.

The elastic connecting member 98 has a substantially cylindrical elastic portion 110 fixed at the upper end to the main body 12 by, for example, a fastening band 108, and a rigid portion 112 extending inward in the radial direction from the lower end of the elastic portion 110. Equipped with. Elastic part 110
Is preferably made of rubber and elastically deforms in accordance with the revolution movement of the eccentric shaft 42 and the polishing member 18. Rigid part 112
Is preferably made of a metal material such as aluminum, and reliably transmits the revolution movement of the eccentric shaft 42 to the elastic portion 110. The elastic portion 110 and the rigid portion 112 can be fixed by a known method such as bolting, bonding, welding, and integral molding. The flange portion 106 of the annular support member 102 is fixed to the rigid portion 1 of the elastic connecting member 98 by, for example, a screw 114.
It is fixed at 12. Elastic portion 110 of elastic connecting member 98
Has an elastic force capable of deforming following the revolving movements of the eccentric shaft 42 and the polishing member 18 and locking their rotation movements.

The annular engaging member 100 has at least one key groove 116 on the inner peripheral surface thereof, and the key 120 is fixed to the key groove 116 by, for example, a bolt 118. The sleeve portion 104 of the annular support member 102 is provided with at least one groove 122 corresponding to the key groove 116 on the outer peripheral surface thereof, into which the key 120 engages. Thereby, the engaging member 100
Is attached to the sleeve portion 104 so as to be slidable only in the axial direction along the outer peripheral surface of the sleeve portion 104 of the annular support member 102. Further, the engagement member 100 can be fixed to a desired position in the axial direction on the outer peripheral surface of the sleeve portion 104 by, for example, a set screw (not shown).

The outer cylinder 124 fixed to the eccentric shaft 42 is a sleeve portion 126 fixed to the inner ring 60 of the second bearing 52.
And a flange portion 128 extending radially outward from one end of the sleeve portion 126. The flange portion 128 of the outer cylinder 124 is the sleeve portion 104 of the annular support member 102.
And a plurality of notches 130 at the outer edge thereof. The notch 130 is provided at the predetermined rotation position of the eccentric shaft 42, and the sleeve portion 1 of the annular support member 102.
The groove 122 of No. 04 is aligned in the axial direction. Groove 122 of annular support member 102 and outer cylinder 124
The engaging member 10 is aligned with the notch 130 of the
When 0 is moved in the direction of the flange portion 128 of the outer cylinder 124 along the sleeve portion 104 of the annular support member 102, the key 120 of the engagement member 100 causes the notch 130 of the outer cylinder 124.
Engage with.

Therefore, according to the engaging means shown in FIG.
The key 120 of the engaging member 100 has an annular support member 10
When arranged in the first position (shown by the solid line in FIG. 5) that engages only the groove 122 of the second groove 122, the eccentric shaft 42 and the polishing member 18 can freely rotate, and at this time, the polishing shown in FIG. The device operates as a double action polisher. Further, when the key 120 of the engaging member 100 is arranged in the second position (shown by the broken line in FIG. 5) in which the key 120 engages with both the groove 122 of the annular support member 102 and the notch 130 of the outer cylinder 124. The eccentric shaft 42 and the polishing member 18 are locked in rotation by the action of the elastic connecting member 98 via the engaging member 100, at which time the polishing device functions as an orbital polishing device.

The engaging member 10 is also formed by the above-mentioned engaging means.
Since 0 is arranged on the opposite side of the chamber 86 with respect to the annular support member 102, that is, outside the dust passage, the risk of malfunction of the engagement member 100 due to dust accumulation is eliminated. Further, by providing the opening 132 in the elastic portion 110 of the elastic connecting member 98 as shown, the engaging member 100
It becomes easier to approach the and the operability is improved. However, since the engaging member 100 slides in the direction parallel to the rotation axis of the polishing member 18, the distance from the operator's hand to the working surface 44 of the polishing member 18 is smaller than that of the engaging means 20 of FIG. And the workability of the polishing apparatus is slightly inferior. In the polishing apparatus 10 of FIG. 1, the elastic connecting member 98 of FIG. 5 is used instead of the elastic connecting member 54, and in the engaging means of FIG. 5, the elastic connecting member 98 of FIG. It goes without saying that the member 54 can be used.

The present invention has been described above based on its preferred embodiment. However, as shown in FIG. 6, for example, a structure in which the engaging member is arranged inside the dust passage of the dust suction means is also within the scope of the present invention. Is. In this case, the elastic sag 144 is fixed to the main body 146 via the outer shell 142 so as to cover all the engaging means including the second bearing 136, the elastic connecting member 138, and the engaging member 140. The body 146 has an elastic sag 144
A dust discharge passage 148 is formed that communicates with the internal space of the. Dust generated by the polishing operation is sucked and conveyed to the outside from the dust discharge passage 148 by, for example, an external suction device through the hole 152 provided in the polishing member 150 and the internal space of the elastic sag 144. With such a configuration, the operation and cleaning of the engaging member 140 are performed by manually winding up the elastic drips 144.

[0040]

As is apparent from the above description, according to the present invention, the dust collecting means for sucking and collecting the dust generated by the polishing operation to prevent the dust from scattering around the multifunction polishing device is provided. Since it is equipped with the above, it is possible to reliably remove the adverse effects of dust on the body and the environment, and at the same time, perform high-performance and high-value-added multi-functions that can switch between finishing and roughing at any time with a single device. A polishing device is provided.

[Brief description of drawings]

FIG. 1 is a sectional front view of a multifunctional polishing apparatus according to an embodiment of the present invention.

2 is a cross-sectional plan view taken along the line II-II of FIG. 1, showing the engagement member.

3 is a view showing the engagement member of FIG. 2 in a first position,
FIG. 2A is a sectional front view corresponding to the lower portion of the apparatus of FIG. 1, and FIG. 2B is a sectional plan view corresponding to FIG.

4 is a view showing the engagement member of FIG. 2 in a second position,
FIG. 2A is a sectional front view corresponding to the lower portion of the apparatus of FIG. 1, and FIG. 2B is a sectional plan view corresponding to FIG.

FIG. 5 is a sectional front view of a multifunctional polishing apparatus according to another embodiment of the present invention.

FIG. 6 is a partial sectional front view of a multifunctional polishing apparatus according to still another embodiment of the present invention.

[Explanation of symbols]

10 ... Multifunctional polishing device 12 ... Main body 14 ... Drive shaft 16 ... Drive unit 18 ... Polishing member 20 ... Engaging means 22 ... Dust absorption means 40 ... First bearing 42 ... Eccentric shaft 52 ... Second bearing 54, 98 ... Elastic connection member 56, 100 ... Engaging member 64, 102 ... Annular support member 84 ... hole 86 ... Room 90, 92 ... Opening 94 ... tube

Continuation of the front page (56) References JP-A-60-135171 (JP, A) JP-A-62-277260 (JP, A) Actual flat 3-7457 (JP, U) Actual flat 2-43154 (JP , U) Actual development 48-15693 (JP, U) Actual development 6-75651 (JP, U) Actual public 51-3989 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) B24B 23/02

Claims (6)

(57) [Claims] 1. A main body, a drive unit having a drive shaft and supported by the main body, and a drive unit that is rotatably connected to the drive shaft at a position eccentric to the drive shaft and operates the drive unit. And an engaging means capable of selectively releasing and locking the rotational movement of the polishing member, the engaging means being connected to the polishing member. Bearing means concentrically arranged on the polishing member, comprising a first part and a second part rotating relative to the first part, and fixedly connected to the second part of the bearing means and to the body An elastic connecting member that is fixed and is rotatably connected to the polishing member via the bearing means, and that elastically deforms in accordance with the revolution movement of the polishing member; and between the elastic connecting member and the polishing member. And is engaged with only the second portion of the bearing means First to release the rotation of the polishing member
A multifunctional polishing apparatus comprising: a position and an engagement member that moves between a second position that engages with both the second portion and the first portion and locks the rotation movement; A multi-function polishing apparatus comprising a dust suction unit that suctions and collects the generated dust to prevent the dust from scattering around the multi-function polishing apparatus. 2. The dust suction means includes a hole extending between a polishing surface of the polishing member and a non-working surface opposite thereto, a chamber defined adjacent to the non-working surface of the polishing member, and A dust passage formed by a pipe line that communicates the chamber with a dust collecting section outside the multifunctional polishing apparatus, and suction for sucking and conveying the dust along the dust passage from the polishing surface of the polishing member to the dust collecting section A multi-function polishing apparatus according to claim 1, further comprising a mechanism, wherein the engagement member is disposed outside the dust passage. 3. The bearing means comprises a bearing having a pair of bearing rings arranged side by side in a radial direction, and the first portion of the bearing means comprises a first bearing ring of the bearing and a drive shaft. An eccentric shaft that is rotatably coupled to the drive shaft at an eccentric position and is fixed to the first bearing ring, and the eccentric shaft has a rotation axis of the polishing member and is coupled to the polishing member. The second portion of the bearing means includes a second bearing ring of the bearing and an annular support member that surrounds the rotation axis of the polishing member and is fixed to the second bearing ring and the elastic connecting member. 3. The chamber of the dust suction means is defined by the non-acting surface of the polishing member, the annular support member, and a sag extending from an outer peripheral edge of the annular support member to the vicinity of the polishing member. The multifunctional polishing apparatus described in. 4. The multifunctional polishing apparatus according to claim 3, wherein the engagement member is arranged on the opposite side of the chamber with respect to the annular support member. 5. The engagement member moves between the first position and the second position in a direction orthogonal to a rotation axis of the polishing member. Multifunctional polishing device. 6. The engagement member includes the annular member between the first position that engages only the annular support member and the second position that engages both the annular support member and the eccentric shaft. The multifunctional polishing apparatus according to claim 5, which slides on a support member.