JPH04343656A - Automatic polishing device - Google Patents

Abstract

PURPOSE:To provide an automatic polishing device capable of efficiently performing the polishing work on the end section of a steel material. CONSTITUTION:Polishing wheels 44, 46 are pivotally supported on a frame 12. A drive wheel frame 60 is pivotally supported relatively movably to the polishing wheel 44. A motor 66, a drive wheel 64 and a wheel 68 are provided on the drive wheel frame 60, and they are brought into close contact with the outer periphery of a steel pipe 11 by the relative movement of the polishing wheel 44 to the drive wheel 64 and the wheel 68. A driven wheel frame 80 is pivotally supported on the frame 12 coaxially with the polishing wheel 46, and the polishing wheel 46 and a driven wheel 84 are brought into close contact with the inner face of the steel pipe 11. An automatic polishing device 10 is moved in the peripheral direction while pinching both faces of the steel pipe 11 with the drive wheel 64, wheel 68 and driven wheel 84, and it concurrently polishes the outer periphery and the inner face of the steel pipe 11 with the polishing wheels 44, 46.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic polishing apparatus for polishing the surface of an end of a steel material or the like.

0002

2. Description of the Related Art Generally, a large number of equipment pipes are installed in various plants. Many of these pipings are made of fixed length steel pipes or pre-bent steel pipes connected by welding.

[0003] This connection of pipes by welding is mostly done on-site. When welding these steel pipes, there is a risk that rust occurring at the end of the pipe or deposits such as dirt adhering to the end of the pipe may cause welding defects and impair the confidentiality of the pipe line. For this reason, during piping installation work,
Polishing near the joints of steel pipes is an important task.

[0004] This steel pipe polishing operation must be performed on both the outer circumferential surface and the inner surface of the steel pipe, and is carried out manually by a worker using a sandpaper wheel or the like attached to a hand-held grinder.

[0005]

[Problems to be Solved by the Invention] However, in large-scale plants, etc., the number of welded parts of the pipes increases, and a lot of labor is required to polish the pipes. This pipe polishing work may require work at heights, and even when the work is performed on the floor, the worker may have to perform it in an awkward posture, such as in a half-stuck position. For this reason, a problem arises in that work efficiency deteriorates in terms of the work environment and work posture.

[0006] In consideration of the above-mentioned facts, the present invention aims to provide an automatic polishing device that can simply and efficiently polish the edges of steel materials.

[0007]

[Means for Solving the Problems] An automatic polishing device according to claim 1 of the present invention is an automatic polishing device for polishing an end portion of a member to be polished, and the automatic polishing device is an automatic polishing device for polishing an end portion of a member to be polished. a frame disposed at the center; a drive wheel that comes into contact with one of the inner and outer circumferential surfaces of the end of the member to be polished and moves along the axial end of the member to be polished; and a drive wheel attached to the frame; a drive source that drives the drive wheel; and a drive source that is pivotally supported by the frame, faces the drive wheel, abuts the other circumferential surface of the end of the member to be polished, and clamps the end of the member to be polished together with the drive wheel. a first polishing means that is pivotally supported on the frame and polishes the one peripheral surface while moving together with the driven wheel; and a first polishing means that is pivotally supported on the frame and moves together with the driven wheel. and a second polishing means for polishing the other peripheral surface.

The automatic polishing apparatus according to claim 2 of the present invention includes:
2. The automatic polishing apparatus according to claim 1, wherein the driving wheel is swingable with respect to the first polishing means, and the driven wheel is swingable with respect to the second polishing means, and each of the driven wheels is swingable with respect to the second polishing means. It is characterized in that the end portion of the steel material is clamped by being held at a predetermined position.

[0009]

[Operation] The automatic polishing apparatus according to claim 1 of the present invention has a frame arranged at the end of the member to be polished, a driving wheel and a first polishing means corresponding to one peripheral surface, and a frame to the other peripheral surface. The driven wheel is made to correspond to the second polishing means.

[0010] In this automatic polishing device, the end of the member to be polished is held between the drive wheel and the driven wheel, and the end of the member to be polished is moved along the circumferential surface of the tip of the member to be polished by the driving of the drive wheel. As the driving wheel and the driven wheel move, the first polishing means and the second polishing means respectively polish one circumferential surface and the other circumferential surface of the end of the member to be polished.

[0011] With this, both sides of the end of the member to be polished can be simultaneously polished by the first polishing means and the second polishing means while self-propelled along the circumferential surface of the end of the steel material. .

The automatic polishing apparatus according to claim 2 of the present invention comprises:
The driving wheel and the driven wheel are configured to be able to swing in correspondence with the first polishing means and the second polishing means, respectively. by this,
Even if the thickness of the workpiece to be polished is different, the workpiece can be polished by bringing the first polishing means and the driving wheel into contact with one peripheral surface, and by bringing the second polishing means and the driven wheel into contact with the other peripheral surface. The polishing member can be reliably held and polished.

[0013] Furthermore, not only the thickness of the member to be polished differs, but also the end portion of a tubular member or the like, which is formed in a constant arc shape, can be reliably held and polished. Furthermore, by swinging the driving wheel and the driven wheel, attachment and detachment from the member to be polished can be facilitated.

The material of the member to be polished to which the present invention is applied may be a metal member such as steel, glass, resin, etc., and the shape may be a flat plate, a tube, or the end of a flat plate. A curved shape can be applied.

Furthermore, as a drive source for the drive wheels, an electric motor can of course be used, but an air motor or the like can also be used.

[0016] Furthermore, as the first and second polishing means,
It is preferable to uniformly polish the end portion of the member to be polished over a predetermined width from the tip. For example, a method in which sandpaper or the like is placed on the outer peripheral surface of a cylindrical roller and the roller is rotated at high speed can be applied.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show an automatic polishing apparatus 10 according to this embodiment. The steel material to which this automatic polishing device 10 is attached is a steel material having an arcuate end, that is, a steel pipe 11.

As shown in FIGS. 1 and 3, this automatic polishing apparatus 10 includes a frame 12 which is a long rectangular box.
is provided. L-shaped frames 14 and 16 are fixed to this frame 12 on sides corresponding to the end faces of the steel material 11. These frames 14 and 16 have intermediate portions in the longitudinal direction parallel to each other, and distal ends thereof are bent in directions facing each other to form bent portions 14A and 16A.

As shown in FIG. 3, the bent portions 14A, 1
The frame 12 in the position opposite to 6A has the frame 12
A substantially cylindrical bearing portion 18 having a through hole communicating with the inside thereof is provided in a protruding manner. A shaft 20 is inserted into this bearing portion 18, and a bearing 20 is provided on the inner surface of the bearing portion 18.
It is pivoted by 2. Further, a gear 24 is fixed to the shaft 20 inside the frame 12.

On the other hand, a motor 26 is attached to the frame 14. The drive shaft 26A of this motor 26 is
A gear 28 is inserted into the frame 12 and fixed thereto. Further, inside the frame 12, a plurality of shafts 3 are provided.
0 is supported in parallel with the drive shaft 26A, and gears 32 and 33 are fixed to these shafts 30, respectively. The gear 28 of the motor 26 and the gears 24 of the two shafts 20 mesh with the gears 32 and 33 of the shaft 30 to transmit the rotation of the drive shaft 26A of the motor 26 to the two shafts 20. Note that the two shafts 20 are configured to rotate in opposite directions.

As shown in FIGS. 1 and 3, the frame 14
, 16 bent portions 14A, 16A each have a frame 1
A spring case 34 is provided to protrude toward the side opposite to 2. These spring cases 34 have a substantially cylindrical shape, and are formed coaxially with the bearing portion 18 of the frame 12, as shown in FIG.

Compression coil springs 36 are accommodated in these spring cases 34, and compression coil springs 36 are also accommodated in the spring cases 34.
On the frame 12 side of 6, there is a substantially disc-shaped bearing bracket 3.
8 is provided. These bearing brackets 38 are arranged coaxially with the spring case 34 and are slidable along the inner surface of the spring case 34 in the axial direction.

A pull-out knob 40 that protrudes from the spring case 34 is formed on the opposite side of the bearing bracket 38 from the frame 12. Further, a bearing 42 is fixed to the frame 12 side of the bearing bracket 38.

The bearing 42 is biased toward the frame 12 by the compression coil spring 36, but the pull-out knob 4
0 in the direction opposite to the frame 12, it moves in the direction away from the frame 12 against the biasing force of the compression coil spring 36. By this movement of the bearing 42, polishing wheels 44 and 46, which serve as first and second polishing means, can be installed between the bearing 42 and the bearing 22, respectively.

As shown in FIGS. 1 and 3, the polishing wheels 44 and 46 have the same shape, and as shown in FIG.
A shaft 50 coaxially penetrates and fixed to the shaft 50.

A convex portion 50A is formed at the tip of the shaft 50 on the bearing 22 side, and a concave portion 20A corresponding to the convex portion 50A is formed at the tip of the shaft 20. Further, the diameter of the tip of the shaft 50 on the side of the bearing 42 is reduced and a convex portion 50B is formed at the tip, and a concave portion 42B corresponding to the convex portion 50B is formed in the cap 42A that is pivotally supported by the bearing 42.

The polishing wheels 44, 46 are attached to the shaft 50.
The cap 42A is attached by inserting the protrusion 50A into the recess 20A of the shaft 20, and inserting the protrusion 50B into the recess 42B of the cap 42A. The protrusions 50A and 50B of the shaft 50 are brought into close contact with the shaft 20 and the bearing 42, respectively, by the biasing force of the compression coil spring 36, and the rotation of the motor 26 can be transmitted. The rotation of the motor 26 is transmitted to rotate the polishing wheels 44, 46. In addition, the polishing wheel 44
, 46 is subjected to a load above a certain level, the convex portion 50A
, 50B and the recesses 20A, 42A to prevent the sliding motor 26 from being overloaded.

Polishing rollers 48 of polishing wheels 44, 46
An abrasive member formed by uniformly bonding abrasive materials is fixed to the outer peripheral surface of the abrasive member. This polishing member polishes the surface of the steel pipe 11 by rubbing against it. A wire brush or the like can also be used as the polishing member.

As shown in FIGS. 1, 2 and 4, a handle 52 having a substantially U-shaped outer shape is provided near the frame 14. As shown in FIGS. The middle part of this handle 52 is
It is parallel to the axial direction of the polishing wheel 44. As shown in FIG. 4, disk-shaped eccentric wheels 54 are formed coaxially with each other at the tips of the handles 52. Note that FIG. 4 shows the frame 12 side of the handle 52.

As shown in FIGS. 3 and 4, these eccentric wheels 54 have an eccentric hole 56 into which the bearing portion 18 of the frame 12 is inserted, and an eccentric hole 58 into which the spring case 34 of the frame 14 is inserted. Each hole is coaxially drilled. A bearing portion 18 and a spring case 34 are rotatably inserted into each eccentric wheel 54 . As a result, as shown in FIGS. 2 and 4, by rotating the handle 52 in the direction of arrow A or in the opposite direction to the direction of arrow A, the eccentric wheel 54 is rotated around the axes of the eccentric holes 56 and 58. Rotate eccentrically.

A pair of side plates 62 of a drive wheel frame 60 are disposed on each of the eccentric wheels 54 of the handle 52. This drive wheel frame 60 includes a pair of side plates 62
As shown in FIG. 3, a substantially arc-shaped support portion 62 has a through hole 62B in which the eccentric wheel 54 is inserted in the middle portion.
A is formed. The drive wheel frame 60 has a through hole 6
It is rotatably supported by an eccentric wheel 54 inserted into 2B. As shown in FIG. 3, a groove 54A is coaxially formed on the outer circumferential surface of the eccentric wheel on the spring case 34 side, and the supporting portion 64A is inserted into the groove 54A to prevent separation.

As shown in FIGS. 2 and 4, the drive wheel frame 60 reciprocates along the longitudinal direction of the frame 12 as the handle 52 rotates in the direction of arrow A and in the opposite direction to the direction of arrow A. That is, it is movable relative to the polishing wheel 44. Note that a biasing means (not shown) is provided between the support portion 62A and the eccentric wheel 54, and is biased in the direction opposite to the direction of arrow A, so that the polishing wheel 44 is tightly attached to the outer peripheral surface of the steel pipe 11. closely followed. Further, by rotating the handle 52 in the direction of arrow A against this biasing force, the polishing wheel 44 is separated from the outer peripheral surface of the steel pipe 11.

As shown in FIG. 2, the drive wheel frame 6
A drive wheel 64 is provided at one end in the longitudinal direction of the vehicle. The drive wheel 64 is attached to a drive shaft 64A that is pivotally supported by a pair of side plates 62. Also. A motor 66 serving as a drive source is attached to the drive frame near the drive wheel 64, and the rotation of the motor 66 is transmitted through a transmission section 66A.
is transmitted to the shaft 64A, and the drive wheel 64 is rotated.

Further, as shown in FIGS. 1 and 2, a wheel 68 is provided at the end of the driving wheel frame 60 on the opposite side from the driving wheel 64 in the longitudinal direction. The wheels 68 are attached to a shaft 68A that is pivotally supported by a pair of side plates 62.

As shown in FIG. 2, the polishing wheel 44 and the driving wheel frame 60 are moved relative to each other by rotation of the handle 52, and the polishing wheel 44 is moved in and out of the space between the driving wheel 64 and the wheel 68 toward the steel pipe 11. . Thereby, the drive wheel 64, the wheel 68, and the polishing wheel 44 can all be brought into contact with the outer circumferential surface of the steel pipe 11 regardless of the outer diameter size of the steel pipe 11. The polishing wheel 44 is connected to the driving wheel 64 and the wheel 6.
In the most protruding state between 8 and 8, the polishing wheel 44,
The driving wheels 64 and the wheels 68 are able to abut on the same plane, that is, a flat plate.

On the other hand, as shown in FIG. 2, a driven wheel frame 80 is provided near the polishing wheel 46. The driven wheel frame 80 is provided with a pair of side plates 82 on both sides of the polishing wheel 46 in the axial direction, and these side plates 82
are connected and formed. As shown in Figure 3,
A substantially arc-shaped support portion 82A is formed in each of the pair of side plates 82, a through hole 82B into which the bearing portion 18 of the frame 12 is inserted, and a through hole 8 into which the spring case 34 is inserted.
2C is drilled.

As shown in FIG. 2, the driven wheel frame 8
0, a driven wheel 84 is provided on the drive wheel 64 side of the support portion 82A. The driven wheel 84 is attached to a shaft 84A that is pivotally supported by a pair of side plates 82.

On the other hand, as shown in FIG. 2, a bracket 70 is provided protruding from the tip of the drive wheel frame 60 on the wheel 68 side. Also, the polishing wheel 46 of the frame 12
A bracket 72 is provided protrudingly adjacent to the bracket 70 in correspondence with the bracket 70 . A support plate 74 is spanned between these brackets 70 and 72. An oblong hole 74A is formed in the end of the support plate 74 on the bracket 70 side, extending in the longitudinal direction of the support plate 74.

This support plate 74 is fixed to the bracket 72 with bolts 76A and nuts 76B, and a thumbscrew 78 inserted into the oblong hole 74A of the bracket 70.
are screwed together and fixed. As a result, with the drive wheels 64 and wheels 68 of the drive wheel frame 60 in contact with the outer peripheral surface of the steel pipe 11, the frame 12 is moved to the support portion 62A of the side plate 62.
The polishing wheel 46 can be fixed in contact with the inner surface of the steel pipe 11 by rotating around the center.

As shown in FIGS. 1 and 2, the side plate 82 of the polishing wheel 46 on the side opposite to the driven wheel 84 has its tip bent toward the opposite side of the wheel 68 of the drive wheel frame 60. A shaft 86 is spanned and connected to the tip. A support fitting 88 is inserted into the intermediate portion of the shaft 86 and is pivotally supported. A support shaft 88A is provided on the support fitting 88 to protrude in the radial direction. Further, a bracket 90 is provided in a middle portion of the frame 16 so as to protrude from the front end side of the frame 12 in the longitudinal direction. A stopper 92 is pivotally supported on this bracket 90. Further, the stopper 92 is slidably inserted into the support shaft 88A in the axial direction.

A thumb screw 94 is screwed into the stopper 92. The tip of the thumbscrew 94 comes into contact with the outer peripheral surface of the support shaft 88A inside the stopper 92 (not shown), so that the stopper 92 is connected to the support shaft 88A.
It can be fixed at any position along the axial direction of 8A. As a result, the driven wheel 84, which swings around the axis of the polishing wheel 46, can be fixed at any position.
With the polishing wheel 44, driving wheel 64, and wheel 68 all in contact with the outer peripheral surface of the pipe 11, the polishing wheel 46 and the driven wheel 84 can be fixed in a state in which they are in contact with the inner surface of the pipe 11. . At this time, the steel pipe 11 is held between the driving wheels 64, the wheels 68, and the driven wheels 84 while being pressed from both the outer peripheral surface and the inner surface.

Next, automatic polishing apparatus 1 applied to this embodiment
The effect of 0 will be explained. 1 and 2 show a state in which the automatic polishing device 10 is attached to a steel pipe 11. The installation of this automatic polishing device 10 onto the steel material 11 is carried out using the piping 1.
The automatic polishing device 10 is inserted from the outside in the axial direction of the pipe 11, and the driving wheel frame 60 is placed on the outside of the pipe 11, and the driven wheel frame 80 is placed on the inside. Drive wheel 62 of drive wheel frame 60
After bringing the wheel 68 into contact with the outer peripheral surface of the pipe 11, the handle 52 is rotated in the direction opposite to the direction of arrow A. As a result, the polishing wheel 44 can be brought close to and in contact with the outer peripheral surface of the steel pipe 11, and the polishing wheel 44, drive wheel 62, and wheel 68 are brought into contact with the outer peripheral surface of the steel pipe 11. By moving the polishing wheel 44 relative to the driving wheel 64 and the driven wheel 68, the polishing wheel 44, the driving wheel 64, and the wheel 68 are brought into close contact with the outer peripheral surface of the steel pipe 11, even if the outer diameters of the steel pipe 11 are different. be able to. In this state, the handle 52 is biased toward the outer peripheral surface of the steel pipe 11 by a biasing means (not shown).

In this state, the frame 12 is rotated around the polishing wheel 44 so that the polishing wheel 46 presses against the inner surface of the steel pipe 11, and the support plate 74 and bracket 70
and are fixed with thumbscrews 78. As a result, the frame 12 and the drive wheel frame 60 are fixed. Moreover, this fixed state can be adjusted according to the wall thickness of the steel pipe 11 by an oblong hole 74A formed in the support plate 74.

Further, the driven wheel frame 80 is rotated so that the driven wheel 82 presses against the inner surface of the pipe 11, and the support shaft 88A and the stopper 92 are fixed with the thumbscrew 94. Thereby, the polishing wheel 46 and the driven wheel 84 can be brought into close contact with the inner surface of the steel pipe 11 according to the inner diameter of the steel pipe 11.

In this state, the automatic polishing device 10
The polishing wheel 44, drive wheel 62, and wheel 68 are in contact with the outer peripheral surface of the steel pipe 11, and the polishing wheel 4 is in contact with the inner surface of the steel pipe 11.
6 and the driven wheel 82, the steel pipe 11 is held in a pressed state, and the automatic polishing device 10 is attached to the end of the steel pipe 11.

By attaching the automatic polishing device 10 to the steel pipe 11 and turning on the motor 66, the drive wheel 64 is driven and moves along the outer peripheral surface of the steel pipe 11 along the end thereof. As the driving wheel 64 moves, the wheel 68 and the driven wheel 84 move, and the automatic polishing device 10 moves stably along the end of the pipe 11.

By turning on the motor 26 of the automatic polishing device 10, the gear 32 provided inside the frame 12 is turned on.
, 33, polishing wheels 44, 46 are driven, and polishing members provided on the outer peripheral surface of a polishing roller 48 polish the outer peripheral surface and inner surface of the steel pipe 11. Polishing wheel 44
The polishing wheel 46 and the polishing wheel 46 are configured to rotate in opposite directions due to the rotation of the motor 26.
4 and 46 and the surface of the steel pipe 11 rub against each other, so that the running of the automatic polishing device 10 is not affected.

As a result, the automatic polishing device 10 can stably move along the end of the steel pipe 11 and uniformly polish the outer peripheral surface and inner surface of the end of the steel pipe 11. 11, it is only necessary to loosen the thumbscrews 78, 94 that secure the drive wheel frame 60 and the driven wheel frame 80 to the frame 12, respectively. As a result, the driving wheels 64, wheels 68, and polishing wheels 44 of the driving wheel frame 60 and the driven wheels 84 of the driven wheel frame 80
The end of the pipe 11 is no longer held between the polishing wheel 46 and the automatic polishing device 10 can be easily removed from the steel pipe 11.

Next, an example in which the automatic polishing apparatus 10 according to this embodiment is used for a flat steel material, ie, a steel plate 13, will be explained.

FIG. 5 shows a state in which the automatic polishing device 10 is attached to the steel plate 13. The automatic polishing device 10 can be attached to the steel plate 13 by the same operation as the attachment to the steel pipe 11. The drive wheels 64 and wheels 68 of the drive wheel frame 60 are brought into close contact with the surface of the steel plate 13, and the handle 52 is rotated in the direction opposite to the direction of arrow A to bring the polishing wheel 44 together with the drive wheels 64 and wheels 68 onto the surface of the steel plate 13. All you have to do is make them come into contact. Thereafter, the polishing wheel 46 and the driven wheel 84 are brought into contact with the steel plate 13, and the driving wheel frame 60 and the driven wheel frame 80 are fixed to the frame 12 with thumb screws 78 and 94.

The automatic polishing device 10 attached to the edge of the steel plate 13 in this manner moves along the edge of the steel plate 13 by driving the motors 26 and 66, and polishes both sides of the edge of the steel plate 13. can be polished at the same time.

The automatic polishing device 10 according to this embodiment can be easily attached to either end of the steel pipe 11 or the steel plate 13.

When polishing steel materials, polishing powder is scattered, but the automatic polishing device 10 can suppress the scattering of the polishing powder by providing means for sucking the polishing powder near the polishing wheels 44 and 46. . This polishing powder suction means may be provided on the downstream side in the rotational direction of each polishing roller 48 in the vicinity where the polishing roller 48 contacts the steel material. Since the polishing wheels 44 and 46 each rotate in a fixed direction, attachment of the polishing powder suction means is easy.

For example, move the polishing wheel 44 in the direction of arrow A (
2 and 5), the polishing powder is mainly scattered from between the polishing wheel 44 and the wheel 48. A polishing powder suction means may be provided between the polishing wheel 44 and the wheel 48, and a polishing powder suction means may also be provided between the polishing wheel 46 and the driven wheel 84.

Note that the polishing wheel 44 is the eccentric wheel 5.
4, the drive wheel 64 and the wheel 68 can be projected and retracted from between the drive wheel 64 and the wheel 68 toward the surface of the steel pipe 11 or the steel material 13, but the invention is not limited to this.
It may be possible to appear or disappear from between 8 and 8. That is, an oval hole is formed in the frame 12 in an arc shape, and the shaft 20 of the polishing wheel 44 is rotatably supported and movable along the oval hole, and the gear 24 of the shaft 20 is connected to the gear 32 or the gear. 33 and transmit the driving force of the motor 26.

Further, in this embodiment, an automatic polishing apparatus for polishing the edge of a steel material has been described, but it is also possible to apply members made of other materials as the member to be polished. That is, by changing the polishing member provided on the polishing wheel, it is possible to polish members made of glass, resin, or other metal materials other than steel.

[0057]

As explained above, the automatic polishing device according to claim 1 of the present invention moves the steel material while being held between the driving wheel and the driven wheel, and the first and second polishing means
Both sides of the end of the member to be polished can be polished simultaneously. As a result, in polishing the member to be polished, the operator only needs to attach an automatic polishing device to the end of the member to be polished, and work efficiency can be greatly improved. Further, since both sides of the member to be polished can be simultaneously polished while running along the edge of the member to be polished, the working time of the polishing operation can be shortened.

The automatic polishing apparatus according to claim 2 of the present invention includes:
Even if the member to be polished is a flat plate, it is easy to attach because it is a tube. Further, it can be easily attached depending on the thickness of the member to be polished.

As described above, the automatic polishing apparatus according to the present invention has the following features:
This has an excellent effect of allowing the polishing work of the member to be polished to be performed easily and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of an automatic polishing apparatus according to an embodiment.

FIG. 2 is a side view of essential parts showing the use of the automatic polishing apparatus according to the present embodiment.

FIG. 3 is a sectional view of a main part taken along line 3-3 in FIG. 2;

FIG. 4 is a perspective view showing main parts of the automatic polishing apparatus according to the present embodiment.

FIG. 5 is a side view of a main part similar to FIG. 2, showing a modification of the use of the automatic polishing apparatus according to the present embodiment.

[Explanation of symbols]

10 Automatic polishing device 11 Steel pipe (member to be polished) 12 Frame 13 Steel plate (member to be polished) 44 Polishing wheel (first polishing means) 46
Polishing wheel (second polishing means) 64 Drive wheel 66 Motor (drive source) 84 Driven wheel

Claims (2)

[Claims] 1. An automatic polishing device for polishing an end of a member to be polished, comprising: a frame disposed corresponding to the end of the member to be polished; and an inner and outer periphery of the end of the member to be polished. a drive wheel that comes into contact with one of the circumferential surfaces of the surfaces and moves along an axial end of the member to be polished; a drive source that is attached to the frame and drives the drive wheel; and a drive source that is pivotally supported on the frame. a driven wheel that faces the drive wheel and abuts the other circumferential surface of the end of the member to be polished and moves together with the drive wheel while holding the end of the member to be polished; and a driven wheel that is pivotally supported by the frame. and a second polishing means that is pivotally supported by the frame and polishes the other peripheral surface while moving together with the driven wheel. An automatic polishing device featuring: 2. The automatic polishing apparatus according to claim 1, wherein the driving wheel is swingable with respect to the first polishing means, and the driven wheel is swingable with respect to the second polishing means. An automatic polishing device characterized in that the ends of the steel material are clamped by being movable and held at predetermined positions.