JPH0453887Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a rotary tool, and particularly to a rotary tool that can simultaneously polish the inner and outer surfaces near the end of a tubular member such as a pipe. It depends.

(Prior art) When welding or brazing pipes, both the inner and outer peripheral surfaces near the joint are polished in advance.
It is necessary to remove deposits such as oxide films, but traditionally in this type of polishing work, polishing the inner peripheral surface and polishing the outer peripheral surface are performed as separate processes using separate tools. This was common, and the work efficiency could not necessarily be said to be high.

For example, Japanese Utility Model Application Publication No. 59-78051 describes a rotary tool that can simultaneously polish both the inner and outer circumferential surfaces to improve work efficiency. In that tool,
As shown in FIG. 13, a polishing section 122 consisting of a shaft section 120 and a cylindrical section 121 coaxially disposed radially outward of this shaft section 120 is provided on the tool tip side. The portion 120 and the cylindrical portion 121 are configured to be rotated simultaneously by a driving portion such as an air motor. A plurality of inner circumferential surface polishing members 123 extend radially outward in the radial direction on the outer circumferential surface of the shaft portion 120, and a plurality of outer circumferential surface polishing members 123 extend radially inward in the radial direction on the inner circumferential surface of the cylindrical portion 121. Members 124 are respectively implanted. These polishing members 123 and 124 are each composed of a polishing cloth having abrasive grains attached to the surface of a flexible plate-like body.

In the above-mentioned rotary tool, the end side of the pipe whose cross section is shown by the two-dot chain line in the figure is positioned between the polishing members 123 and 124 coaxially with the shaft section 120, and By rotating the cylindrical portion 121, the inner peripheral surface of the pipe is simultaneously polished by the inner peripheral surface side polishing member 123, and the outer peripheral surface is simultaneously polished by the outer peripheral surface side polishing member 124.

(Problem to be solved by the invention) By the way, in the above rotary tool, when the specifications such as the outer diameter and inner diameter of the pipe are changed, the polishing part 1 has a different shape depending on the change.
I need to replace it with 22. In other words, in the above case, the elastic reaction forces of the flexible polishing members 123 and 124 that are elastically deformed between the outer circumferential surface of the pipe and the inner circumferential surface of the cylindrical portion 121 and between the inner circumferential surface of the pipe and the outer circumferential surface of the shaft portion 120 are This structure acts as a machining force on both the inner and outer circumferential surfaces, and the amount of elastic deformation is uniquely determined by the shape relationship between the pipe and the polishing section 122. Therefore, if the specifications of the pipe are changed and the previous shape relationship becomes different, the machining force will be different for the same polishing part 122. As a result, appropriate machining amount and machining accuracy cannot be obtained, so it is necessary to prepare polishing parts of various shapes in advance to correspond to the range of expected changes in the pipe specifications, and it is necessary to prepare polishing parts of various shapes in advance for each work. Therefore, it is necessary to select the polishing part and replace it. This causes problems in that sufficient working efficiency cannot be obtained and processing costs increase.

This idea was made in view of the above,
The purpose of this is to be able to properly process both the inner and outer circumferential surfaces of the same component at the same time, even when the specifications of the workpiece, such as a pipe, differ, thereby improving workability and reducing processing costs. The purpose of the present invention is to provide a rotary tool that can perform the following functions.

(Means for Solving the Problems) Therefore, the rotary tool of this invention is provided with a rotary tool that is arranged on the inner side of the inner circumferential surface and on the outer side of the outer circumferential surface on the end side of the tubular member, respectively, substantially parallel to the axis of the tubular member. Two polishing members each having an outer peripheral surface with a substantially circular cross section are provided, and these polishing members are brought into contact with the inner peripheral surface and the outer peripheral surface of the tubular member, respectively, and are rotated. The rotary tool is configured to relatively rotate each polishing member along the circumferential surface of the tubular member, and further, the diameter of the rotation locus of each polishing member with respect to the tubular member can be changed independently of each other. It is characterized by being composed of

(Function) In the above rotary tool, rotating polishing members are brought into contact with each of the inner and outer peripheral surfaces of the tubular member, and these polishing members are moved along the respective surfaces to be processed. By moving them relative to each other in the circumferential direction, simultaneous polishing of both the inner and outer circumferential surfaces is performed. The amount of processing per unit time and processing accuracy in this type of polishing process are determined by adjusting the distance between the axis of each polishing member and the surface to be machined, relative to the outer diameter of each polishing member. It is possible to bring it into a proper state. In the above arrangement, the distance between each axis and the surface to be processed, that is, the diameter of the movement locus of each polishing member along each surface to be processed, can be changed independently from each other. Therefore, for example, if the outer diameters of the tubular members are different, by changing the diameter of the movement locus of the polishing member on the outer circumferential surface side, and even if the outer diameters are the same, if the wall thicknesses, that is, the inner diameters are different, By changing the locus of movement of the polishing member on the inner peripheral surface side independently of the polishing member on the outer peripheral surface side, it becomes possible to perform proper simultaneous polishing of both the inner and outer peripheral surfaces. For this reason, a single abrasive member can be applied to a wider range of applications when the tubular members have different shapes and materials, and as a result, the number of types of abrasive members that need to be prepared is reduced, and the frequency of replacement is also reduced, which improves work efficiency. It is possible to improve the performance and reduce processing costs. Note that the term "polishing" used here has a wide meaning including grinding, polishing, etc.

(Example) Next, a specific example of the rotary tool of this invention will be described in detail with reference to the drawings.

An embodiment of this invention is shown in FIGS. 1 to 12. First, the overall structure of the rotary tool in this embodiment will be explained. This rotary tool consists of a first polishing member 2 and a second polishing member that polish the inner circumferential surface and outer circumferential surface on the end side of a tubular member 1 such as a pipe. 3 about their own axes, that is, rotate, and rotate the first and second polishing members 2 and 3 in the circumferential direction along the inner and outer circumferential surfaces of the tubular member 1, respectively. Revolutionary movement mechanism 10
7 (Figures 1 and 4). Further, the rotary tool is equipped with a revolution trajectory changing mechanism 108 (FIG. 7) for changing the diameter of the revolution trajectory of the first and second polishing members 2 and 3. Further, the rotary tool grips the tubular member 1, and with the axes of the first and second polishing members 2 and 3 in the rotary tool parallel to the axis of the tubular member 1, the rotary tool is moved to the end of the tubular member 1. Gripping mechanism 10 for attaching and fixing in the vicinity
9 (Figures 1 and 9). Further, the rotary tool has an air supply mechanism 110 for operating the rotation/revolution movement mechanism 107 and the gripping mechanism 109.
(Figure 3).

First of all, regarding the above-mentioned rotation and revolution movement mechanism,
This will be explained based on FIGS. 1, 2, and 4. Second
In the figure, 5 is a main body frame, and this main body frame 5
consists of left and right plates 6, 7, and a plurality of guide bars 8 extending parallel to each other, each end of which is attached to these plates 6, 7. As shown in the figure, inside the main body frame 5, the right side plate 7
An air motor 9 is attached to the upper position in the figure. The output shaft 10 of this air motor 9 passes through the right plate 7, and a first gear 11 is attached to the tip thereof.
The first gear 11 is in mesh with the second gear 13 of the reduction mechanism 12. This speed reduction mechanism 12 includes the second gear 13 and the second gear 13.
It consists of a reducer shaft 14 which is attached to one end and passes through the right side plate 7 to the inside of the main body frame 5, and a third gear 15 which is attached to the other end of this reducer shaft 14. A fourth gear 16 is meshed with the third gear 15. This fourth gear 16, as shown in FIG.
The gear body 17 has a cylindrical shape, and the gear body 17 is supported by a bearing on the right plate 7 so as to be rotatable. This gear body 17 has a first rotating shaft 18.
is penetrated, the first rotation shaft 18 rotates integrally with the fourth gear 16 by the spline mechanism, and the fourth
It is configured to be movable in the axial direction relative to the gear 16. The reason why it is configured to be movable in the axial direction will be described later.

As shown in FIG. 1, the first rotating shaft 18 has a distal end (left side in the figure) protruding inward of the main body frame 5, and a proximal end of a rotating frame 19 is attached to the distal end. That is, as shown in FIG. 4, a fitting hole 20 is formed on the base end side of the rotating frame 19, and the distal end side of the first rotating shaft 18 is fitted and connected into the fitting hole 20. The first rotating shaft 18 and the rotating frame 19 are engaged in the rotational direction and rotate integrally. Note that the configuration of the distal end side of the rotating frame 19 will be described later. On the other hand, a fixed frame 21 is fitted into each of the guide bars 8 so as to be movable in the axial direction. The side is inset,
The rotating frame 19 is rotatably supported by bearings.

The distal end of the rotary frame 19 has a U-shaped cross section that opens toward the left in the figure, and the axis of the distal end is eccentric with respect to the axis of the proximal end.
As shown in FIG. 4 and FIG. A pair of support shafts 25, 25 extending in a direction substantially orthogonal to the first rotating shaft 18 is provided between the opposing parts 23, 24, and two positions in the axial direction of the support shafts 25, 25 are provided, respectively. 1st
and second polishing member connecting bodies 26, 27 (hereinafter referred to as connecting bodies) are supported slidably in the axial direction of the support shafts 25, 25. The reason why it is made slidable in this way will be described later.

As shown in FIG. 4, the first and second connecting bodies 26 and 27 have first and second fixing parts 28 and 29, and through holes 3 formed in the fixing parts 28 and 29, respectively.
The second and third rotating shafts 32 and 33 are inserted through the first rotating shaft 18 through bearings 0 and 31 in parallel with the first rotating shaft 18. Protruding second and third rotating shafts 32, 33
First and second connecting portions 34 and 35 for connecting the first and second polishing members 2 and 3, respectively, are provided at the respective tip portions of the
is provided. and the first and second connection parts 3
The first and second abrasive members 2, 3 connected to 4, 35, respectively, are held by holding the first and second connecting bodies 26, 27 at appropriate axial positions on the support shaft 25. Each of those axes is the first rotating shaft 18
It is eccentric to the axis of the The configuration for holding this position will be explained together with the configuration of the revolution trajectory changing mechanism, which will be described later. Incidentally, fifth and sixth bevel gears, which will be described later, are provided at the base end portions of the second and third rotating shafts 32 and 33, which protrude toward the base end side (to the right side in the figure) from the fixed portions 28 and 29, respectively. There is.

On the other hand, as shown in FIG. 4, a support frame 36 having a U-shaped cross section and opening downward in the figure is attached to the base end side of the outer surface of the second facing portion 24 of the rotating frame 19. As shown in FIG. Third and fourth opposing portions 37 of this support frame 36,
A fourth rotation shaft 39 is rotatably supported between the shafts 38 and 38 by a bearing. One end of the fourth rotating shaft 39 passing through the fourth opposing portion 38 (right side in the figure)
A fifth gear 40 is attached to. This fifth gear 40 is meshed with an internal gear 41 provided on the base end side of the inner peripheral portion of the fixed frame 21 . Further, within the support frame 36, a first bevel gear 42 is attached at a position slightly toward the center of the outer circumferential portion of the fourth rotating shaft 39 on the right side in the figure. This first bevel gear 42 meshes with a second bevel gear 43 within the support frame 36, and this second bevel gear 43
is attached to one end of the fifth rotating shaft 44 (lower side in the figure). The fifth rotating shaft 44 has bearings at both ends thereof on the proximal end sides (on the right side in the figure) of the first and second opposing parts 23 and 24 of the rotating frame 19 in a state substantially orthogonal to the first rotating shaft 18. It is rotatably supported through the
One end side (lower side in the figure) protrudes into the support frame 36. Third and fourth bevel gears 45 and 46 are respectively attached to two locations in the axial direction of the outer circumference of the fifth rotating shaft 44 within the rotating frame 19 so as to be movable in the axial direction of the rotating shaft 44 . These third and fourth bevel gears 45 and 46 are connected to first and second support members 47 and 48 that extend from the first and second connecting bodies 26 and 27 toward the proximal end through bearings, respectively.
It is rotatably supported on the proximal end side (right side in the figure). The third and fourth bevel gears 45 and 46 are respectively attached to the base ends (on the right side of the figure) of the second and third rotating shafts 32 and 33 that constitute the first and second connecting bodies 26 and 27. The fifth and sixth bevel gears 49, 5
It is engaged with 0.

In the above-mentioned autorotation/revolution movement mechanism 107, the rotational force of the output shaft 10 of the air motor 9 is applied to the first gear 1.
1, reduction mechanism 12, fourth gear 16, first rotating shaft 1
8, the signal is transmitted to the rotating frame 19, and the rotating frame 19 is rotationally driven. In the rotating frame 19, the first and second polishing members 2 and 3 are held at positions eccentric to the axis of the first rotating shaft 18, so that as the rotating frame 19 rotates, the first and second polishing members 2 polishing member 2,
3 revolves around the axis of the first rotating shaft 18. Also, due to the rotation of the rotating frame 19, the supporting frame 3
6 will rotate integrally with the rotating frame 19,
As a result, the fifth gear 40 moves along the internal gear 41. Due to this movement, the fifth gear 40 rotates around its own axis, and the rotation causes the fourth rotation shaft 39, the first bevel gear 42, the second bevel gear 43, and the fifth rotation shaft 44 to rotate.
The rotation of the third and fourth bevel gears 45 and 46, which rotate together with the fifth rotating shaft 44, is transmitted to the fifth and sixth bevel gears 49 and 50, and the second and third bevel gears 45 and 46, respectively.
This is transmitted to the rotating shafts 31 and 33, and the first and second polishing members 2 and 3 rotate about their own axes, that is, rotate on their own axis.

Next, the revolution movement trajectory changing mechanism 108 will be explained based on FIGS. 6 to 8. Figure 7 shows rotating frame 1
9, the first and second connecting bodies 26, 27 are supported by a pair of support shafts 25, 25 extending between the first and second opposing parts 23, 24 of FIG. In the figure, first and second bolts 51 and 52 for spring hooking are respectively attached to both sides of the second facing portion 24, and these first and second bolts 5
1 and 52, third and fourth bolts 53 and 54 for spring hooking are also attached to the first and second connecting bodies 26 and 27, respectively. A first spring 55 is attached to the first and third bolts 51 and 53.
and the second and fourth bolts 5 respectively.
2 and 54 are respectively attached to both ends of a second spring 56, and the spring force of the first and second springs 55 and 56 causes the first and second connecting bodies 26 and 27 to be connected to the second opposing portion 24, respectively. It is biased towards the side. Further, first and second adjusting screws 57 and 58 are screwed into the second facing part 24 from the opposite side (lower side in the figure), and the tips of each adjusting screw 57 and 58 are connected to the first facing part 24. and the second facing portion 24 . The tip of the first adjusting screw 57 comes into contact with the first support member 47, and the tip of the second adjusting screw 58 comes into contact with the second support member 48, thereby making contact with the first and second springs 55, 56. Therefore, the first and second connecting bodies 26 and 27, which are biased toward the second facing portion 24, are supported, respectively, against the biasing force. That is, the above-mentioned revolution movement trajectory changing mechanism 10
8, the first and second adjustment screws 57, 58
By adjusting these, the first and second connecting bodies 26 and 27 move in the axial direction on the support shafts 25 and 25, respectively, thereby causing the first and second polishing members 2, 3, the first rotating shaft 18
The eccentric positions with respect to the axes of the polishing members 2 and 3 are respectively changed, and as a result, the diameters of the respective orbits of revolution of the first and second polishing members 2 and 3 are changed independently. Note that the first and second connecting bodies 26, 2
7 moves on the support shafts 25, 25, the fourth
As shown in the figure, the first and second support members 47, 4
8, the third and fourth bevel gears 45, 46 also connect to the fifth bevel gear 45, 46.
It will move on the rotating shaft 44.

Next, the gripping mechanism 109 will be explained based on FIGS. 1, 9, and 10. As shown in FIG.
An outer cylinder 60 is attached as a casing that extends leftward substantially coaxially with the first rotating shaft 18 to which the outer cylinder 60 is attached. As shown in FIG. 9, first and second annular spacers 61 and 62 are provided at two locations in the axial direction inside this outer cylinder 60, so that first and second inner cylinder parts 63 and 64 are connected to the outside of the outer cylinder 60. It is arranged coaxially with the cylinder 60, and between the first inner cylinder part 63 and the outer cylinder 60, and the second
First and second annular piston chambers 65 and 66 are formed between the inner cylinder portion 64 and the outer cylinder 60, respectively. These first and second annular piston chambers 65,
66 respectively include first and second annular pistons 6
7 and 68 are disposed so as to be freely slidable in the axial direction, and a first pressure chamber 69 is provided in the first annular piston chamber 65 on the left side of the first annular piston 67 in the figure, and a second pressure chamber 7 is provided on the right side of the first annular piston 67.
0 respectively, while the second annular piston 6
A third pressure chamber 71 is formed in the second annular piston chamber 66 on the right side of FIG. 8, and a fourth pressure chamber 72 is formed on the left side. Further, between the first and second annular pistons 67 and 68, a pair of upper and lower first and second clamp claws 73 and 74 are disposed circumferentially in the figure. Incidentally, first and second annular pressing portions 76 and 77 are respectively provided on the end surfaces of the first and second annular pistons 67 and 68 that extend in the axial direction. The inner circumferential surfaces on the distal end side of the annular pressing portions 76 and 77 are configured as first and second tapered surfaces 78 and 79 whose diameter increases toward the distal end side. On the other hand, the inner circumferential surfaces of the first and second clamp claws 73 and 74 at both ends in the axial direction are respectively formed as first and second gripping surfaces 80 and 81 that substantially follow the outer circumferential surface of the tubular member 1. The surfaces are formed as third and fourth tapered surfaces 82 and 83 that taper fit into the first and second tapered surfaces 78 and 79, respectively. Note that an annular groove 84 is formed at the center position on the inner circumferential side of each of the clamp claws 73 and 74, and a ring 85 is disposed inside this groove 84.
The clamp claws 73 and 74 are urged toward the inner circumferential surface of the outer cylinder 60. That is, in the gripping mechanism 109, the first and third pressure chambers 6
When air pressure is applied inside 9 and 71, the first and second
The annular pistons 67 and 68 will move toward each other. At this time, each piston 67,
The tip sides of the first and second annular pressing parts 76 and 77 of 68 move toward the center of the clamp claws 73 and 74, respectively, and thereby the pressing parts 76 and 77
The first and second tapered portions 78 and 79 of the clamping claws 73 and 74 taper-fit with the third and fourth tapered surfaces 82 and 83 of the clamping claws 73 and 74, respectively.
4 is pressed inward in the radial direction, and the outer peripheral surface of the tubular member 1 is gripped by the first and second gripping surfaces 80 and 81.

Next, the air supply mechanism 110 will be explained based on FIG. 3. In the figure, 87 is an air hose, one end of which is connected to an air source (not shown), and the other end is connected to the first to third ports 88,
First port 88 of switching valve 91 with 89, 90
It is connected to the. This switching valve 91 is configured to be able to switch between a first port 88 and a second port 89, and between a first port 88 and a third port 90 using a lever 92. A first pipe 93 is connected to the second port 89 of the switching valve 91, and a second pipe 94 is connected to the third port 90. 1st above
The pipe 93 is branched in the middle, and a first branch pipe 95 is provided with an on-off valve 97 that can be opened and closed by a lever 96, and its tip is connected to the air motor 9 (see FIG. 2). As shown in FIG. 3, the second branch pipe 98 of the first pipe 93 is further branched, and the third branch pipe 99 is the first branch pipe 99 in the gripping mechanism
The pressure chamber 69 (see FIG. 9) and its fourth branch pipe 100 are connected to a third pressure chamber 71, respectively. Further, as shown in FIG. 3, the second pipe 94 is also branched, and the fifth branch pipe 101 is connected to the second pressure chamber 70.
(See FIG. 9), the sixth branch pipe 102 is connected to the fourth branch pipe 102.
The pressure chambers 72 are connected to each other. The switching valve 91 is attached to a mounting member 103 attached to the main body frame 5, as shown in FIG. In the air supply mechanism 110, the on-off valve 97 is closed,
By setting the switching valve 91 to the switching position where the first port 88 and the third port 90 communicate with each other (first switching position), air flows from the second pipe 94 to the fifth and sixth branch pipes 101 and 102. is introduced into the second and fourth pressure chambers 70, 72 of the gripping mechanism through the first and second pressure chambers 70, 72 of the gripping mechanism.
This causes the annular pistons 67 and 68 to move away from each other (grip release state). Also, in this state, by setting the switching valve 91 to the switching position (second switching position) where the first port 88 and the second port 89 communicate with each other, air is transferred from the first pipe 93 and the second branch pipe 98 to the switching position. The first and third pressure chambers 69 and 7 of the gripping mechanism 109 are connected to each other through the third and fourth branch pipes 99 and 100.
1, the first and second annular pistons 67,
68 in the direction of approaching each other (grasped state). Furthermore, when the on-off valve 97 is opened in this state, air is supplied to the air motor 9 via the first branch pipe 95, and the air motor 9 is driven.

Note that in the rotary tool having the above configuration, the first and second polishing members 2 and 3 are further moved in the axial direction,
A protrusion mechanism 111 is provided for adjusting the amount of protrusion of the tubular member 1 toward the end. That is, the first
As shown in FIGS. 1 and 12, a slit 104 is formed in the mounting member 103 of the main body frame 5, and a handle lever 105 extends into the main body frame 5 through the slit 104. A pivot 106 is provided on the inner surface (lower surface in FIG. 12) of the mounting member 103 at a position near the slit 104, and the handle lever 105 is rotatably supported by the pivot 106.
The tip side (lower side in FIG. 11) of the handle lever 105 is connected to the fixed frame 21, so that by rotating the handle lever 105, the fixed frame 21 is moved along the guide bar 8... The polishing members 2 and 3 are moved toward the distal end or the proximal end. Note that at this time, the first rotating shaft 18 moves in the axial direction with respect to the gear body 17. In addition, a peep hole (not shown) is provided near the base end of the outer cylinder 60 in the gripping mechanism 109.
is formed so that the finishing of the tubular member 1 by the polishing members 2 and 3 can be observed from the outside.

Next, the operating state of the rotary tool having the above configuration will be explained.

First, the outer cylinder 60 constituting the gripping mechanism 109 of the rotary tool is fitted onto the end side of the tubular member 1 to be polished, and the clamp claws 73 and 74 are attached to the outer peripheral surface of the tubular member 1.
so that each of the first and second gripping surfaces 80, 81 is positioned. Then, the switching valve 91 is switched to the second switching position using the lever 92, air is introduced into the first and third pressure chambers 69, 71, and the first and second annular pistons 67, 68 are brought closer to each other. The third and fourth tapered surfaces 82 and 83 of the two tapered surfaces 78 and 79
With the taper fitting, the first and second gripping surfaces 80 and 81 on each end side of the clamp claws 73 and 74 press and grip two locations on the outer circumferential surface of the tubular member 1 in the axial direction. As a result, the rotary tool is attached and installed on the end side of the tubular member 1 with the axes of the first and second polishing members 2 and 3 parallel to the axis of the tubular member 1. Become. Next, the first and second adjusting screws 57 and 58 and the handle lever 105 are operated while observing the first and second polishing members 2 and 3 and the end sides of the annular member 1 through the above-mentioned peephole. That is, the first adjustment screw 5
7 to adjust the amount of eccentricity of the first polishing member 2 with respect to the first rotating shaft 18 according to the outer circumferential diameter of the tubular member 1, and by operating the second adjustment screw 58 to The amount of eccentricity of the second polishing member 3 with respect to the first rotating shaft 18 is adjusted according to the inner circumferential diameter of the second polishing member 3 . and handle lever 10
In the operation 5, when adjusting the amount of eccentricity, the fixed frame 21 is moved to the distal end side to be located near the end of the tubular member 1, and the first and second adjustment screws 57, 58 are adjusted. The eccentricity is adjusted visually, and after the adjustment of the eccentricity is completed, the first and second polishing members 2, 3 are further moved toward the distal end, so that the peripheral side portions of the polishing members 2, 3 are shaped like a tube. This is for making contact with the inner circumferential surface and outer circumferential surface of the end portion of the member 1, respectively. Note that the tubular member 1 with the same dimensions...
When polishing multiple pieces in succession, once the eccentricity is adjusted to a predetermined amount by operating the first and second adjusting screws 57 and 58, this adjustment is not necessary afterwards. , therefore the handle lever 105
It is also possible to perform only these operations.
Next, by opening the on-off valve 97 and supplying air to the air motor 9 to drive the air motor 9, the first and second polishing members 2 and 3 are rotated and the tubular member 1 is rotated as described above. It revolves along the outer circumferential surface and the inner circumferential surface, respectively. As a result, the inner and outer peripheral surfaces of the end portion of the tubular member 1 are polished. Then, the finish condition of the machining is observed through the peep hole, and when the finish condition is appropriate, the on-off valve 97 is closed, the drive of the air motor 9 is stopped, and the operation of the handle lever 105 is released, and each polishing member is 2 and 3 are returned to their original states. Then, switch the switching valve 91 to the first switching position,
Introducing air into the second and fourth pressure chambers 70, 72,
The clamp claw 7 is released by releasing the taper fitting due to mutual separation movement of the first and second annular pistons 67 and 68.
3 and 74 are released, and the rotary tool is removed from the tubular member 1.

As described above, in the above embodiment, the first and second polishing members 2 and 3 are rotationally driven to rotate and revolve on both the inner and outer peripheral surfaces of the end side of the tubular member 1. It is possible to provide a structure in which the relative sliding speed with respect to the tubular member 1 in each contact processing region on both peripheral surfaces is given larger than in the case of only the rotation speed in a conventional rotary tool. As a result, it becomes possible to increase the amount of processing per unit time and improve the processing accuracy, making it possible to perform polishing work more efficiently than before.

Further, in the above embodiment, the diameters of the orbits of the first and second polishing members 2 and 3 are set to the first
By operating the second adjustment screws 57 and 58, they can be changed independently of each other, so that even when changing the specifications such as the outer diameter or inner diameter of the tubular member 1, for example, By changing each of the above-mentioned orbital movement trajectories, it is possible to perform proper simultaneous polishing of both the inner and outer circumferential surfaces, and therefore, the application range of the same first and second polishing members 2 and 3 is wide. Since the number of types of polishing members to be prepared is reduced and the frequency of replacement is also reduced, it is possible to improve workability and reduce processing costs.

Further, in the above embodiment, the outer circumferential surface of the end side of the tubular member 1 is gripped at both axial end sides of the first and second clamp claws 73 and 74 arranged circumferentially, that is, at two locations in the axial direction. It has a structure,
Therefore, the rotary tool can be securely fixed to the tubular member 1. Furthermore, the number of parts is reduced because the clamping members 73 and 74, which are integrally formed, are shared, instead of providing gripping members for gripping at two locations in the axial direction independently of each other. Therefore, the configuration becomes simple and the axial length can be shortened.

In addition, although the embodiment in which the tubular member 1 is fixed has been shown above, the tubular member 1 may be rotated.

(Effect of the invention) As mentioned above, in the rotating tool of this invention,
By contacting the inner circumferential surface and the outer circumferential surface of the tubular member and rotating them relative to each other, the diameter of each movement locus of the polishing member for polishing both sides can be changed independently from each other. Therefore, even when changing the specifications such as the outer diameter or inner diameter of a tubular member, by changing the above-mentioned movement trajectories, it is possible to perform appropriate simultaneous polishing of both the inner and outer circumferential surfaces. Therefore, the same polishing member can be applied in a wide range of applications, the number of types of polishing members to be prepared is reduced, and the frequency of replacement is also reduced.
It becomes possible to improve workability and reduce processing costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the overall configuration of an embodiment of the rotary tool of this invention, FIG. 2 is a partially sectional side view of the rotary tool, and FIG. 3 is a side view of the rotary tool showing an air supply mechanism. Fig. 4 is a cross-sectional view of the main parts of the rotary tool showing an enlarged view of the rotation and revolution movement mechanism in Fig. 1, Fig. 5 is a view taken along the - line in Fig. 1, and Fig. 6 is a view taken along the - line in Fig. 1. The arrow view, Figure 7 is - of Figure 1.
Fig. 8 is a cross-sectional view taken along the - line in Fig. 7;
FIG. 9 is an enlarged cross-sectional view of the main parts of the rotary tool showing the gripping mechanism in FIG. 1, FIG. 10 is a cross-sectional view of the gripping mechanism in FIG. 9, and FIG. 11 is a partial cross-sectional view showing the ejection mechanism. , FIG. 12 is an explanatory view of the operating state of the handle lever in the ejection mechanism, and FIG. 13 is a cross-sectional view of a conventional rotary tool. 1... Tubular member, 2... First polishing member, 3...
Second polishing member, 108...Movement trajectory changing mechanism.

Claims (1)

[Scope of utility model registration request] Two polishing members each having an outer circumferential surface with a substantially circular cross section are disposed on the inner side of the inner circumferential surface and on the outer side of the outer circumferential surface on the end side of the tubular member, respectively, and are disposed substantially parallel to the axis of the tubular member. , these polishing members are brought into contact with and rotated on the inner peripheral surface and the outer peripheral surface of the tubular member, respectively, and the tubular member and each of the polishing members are relatively rotated along the peripheral surface of the tubular member. What is claimed is: 1. A rotary tool comprising: a rotary tool comprising: a rotary tool; further comprising: a rotary tool configured such that the radius of a rotational locus of each polishing member relative to the tubular member can be changed independently of each other;