JP2013166225A - Surface treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface treatment apparatus capable of performing uniform deburring and the like in a front-back direction of a conveyance direction of a treatment object and also in a width direction.SOLUTION: A surface treatment apparatus 10 includes a conveyance conveyor 22 support by a body frame 12, a pair of rotary brushes 40A, 40B, a rotary drive mechanism therefor, and a wiper mechanism. On brush motors 50A, 50B sides for rotating the rotary brushes 40A, 40B, motor bases 52A, 52B, a cam 82, and wiper drive parts 90A, 90B using a rod end 86 are provided. Further, on a non-motor side, bearing guides 102A, 102B and wiper operating bearings 106A, 106B are provided to guide wiper movement of the rotary brushes 40A, 40B. Angles at which rotary brushes 40A, 40B performing wiper movement contact with a workpiece W are changed, thus performing uniform deburring around the entire periphery of the workpiece W.

Description

  The present invention relates to a surface treatment apparatus that removes burrs and polishes surfaces generated during processing of metal products and molded products, and more specifically, relates to deburring and uniformizing surface treatment before and after processing. Is.

  A film or foil is widely provided on the surface of a molded article such as a synthetic resin for the purpose of improving decoration and functionality. There are various methods for forming a coating on such a molded product, such as a method of simultaneously molding a resin product and contacting the coating, such as transfer molding and in-mold molding. In many cases, burrs are generated on the surface edge of the product. Moreover, not only a resin molded product but a burr | flash generate | occur | produces in an edge part also in the process of the sheet metal processed material which is a metal product, for example. If the burrs remain, not only the appearance of the molded product is deteriorated, but also there is a risk that a cutting accident due to burrs or a function deterioration of the product due to burrs may occur. Therefore, it is necessary to remove them to prevent such a situation. As an apparatus for performing such deburring and surface treatment, for example, there is a device as shown in FIG.

  In the example illustrated in FIG. 7, the rotating brush 200 is disposed above the transport conveyor 208 so as to be substantially orthogonal to the transport direction of the transport conveyor 208. A motor 204 is connected to one end side of the shaft 202 of the rotating brush 200, and the other end side is rotatably supported by a bearing 206. Since the workpiece W (processing object) is conveyed in a direction substantially orthogonal to the axis 202 of the rotary brush 200, the state where the workpiece W hits the brush is only the relationship between the speed of the conveyor 208 and the rotation speed of the rotary brush 200. It was decided by. In addition, the angle at which the rotating brush 200 hits the workpiece W is always constant, and therefore, the deburring state after passing through the rotating brush 200 is strong before and after the workpiece W but weak at the left and right. It was.

  Regarding the improvement of the state of polishing in the width direction of the workpiece, the following Patent Document 1 is not a deburring device, but the drive shaft of the spiral brush is inclined with respect to the direction orthogonal to the feeding direction, In addition, there is disclosed a woodworking polishing apparatus in which a plurality of lines are arranged so that the polishing direction is also generated in the width direction and polishing is performed without unevenness.

JP-A-6-31613

  However, when the above-described background art is applied to deburring, in order to actually perform uniform polishing in the width direction as well, an angle that is inclined with respect to a direction that is perpendicular to the workpiece conveyance direction and a plurality of brushes. It is necessary to provide a plurality of brushes having different values. For this reason, the entire apparatus becomes large. In addition, since the inclination angle of the brush cannot be freely changed, there is a problem that it is difficult to cope with the case where the shape and dimensions of the workpiece are different.

  The present invention focuses on the above points, and can perform uniform deburring and polishing not only in the front-rear direction but also in the width direction of the processing target without increasing the number of brushes more than necessary. It is an object of the present invention to provide a surface treatment apparatus.

  The surface treatment apparatus according to the present invention includes a transport unit that transports a processing target in a predetermined direction, and is non-parallel to the transport direction of the processing target on the transport unit and to a transport surface of the transport unit. At least one rotating brush that is in contact with the object to be processed and performs surface treatment, and is provided on one end side of the rotating shaft of the rotating brush, and rotates to rotate the rotating brush. The conveying surface such that the other end side of the rotating shaft forms an arc in the front-rear direction of the conveying direction with the driving means, the bearing provided on the other end side of the rotating shaft, and one end side of the rotating shaft as a fulcrum And a wiper mechanism that repeatedly operates the rotary brush in a fan shape while maintaining a substantially parallel state with respect to.

  One of the main forms is that the wiper mechanism is provided on one end side of the rotating shaft of the rotating brush, and driving means for wiping the rotating brush with the one end side as a fulcrum, the rotating shaft Guide means provided on the other end side for guiding the wiper operation of the rotating brush is provided. In another form, both end sides of the rotating shaft of the rotating brush are rotatably supported by bearings on a base movable with respect to the upper surface of the main body frame of the surface treatment apparatus, and the driving means A base on one end side of the rotating shaft is driven.

  In still another embodiment, the drive means includes a lot end fixed to the base, a cam that transmits a reciprocating motion to the lot end via a lot end shaft, a cam drive means that rotates the cam, the base, A base bearing is provided between the upper surfaces of the main body frame and rotatably supports the base with respect to the upper surface of the main body frame. In still another embodiment, the guide means has a wiper operation guide bearing provided on the bottom surface side of the base on the other end side of the rotating shaft, and a groove engaging with the bearing is formed in a substantially arc shape. A bearing guide provided on the upper surface of the main body frame is included. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  According to the present invention, the rotating brush provided on the conveying means for conveying the object to be processed has the one end side of the rotating shaft as a fulcrum, and the other end side is in front of and behind the conveying direction while maintaining a substantially parallel state with respect to the conveying surface. Since the wiper is operated so as to draw an arc, it is possible to uniformly perform deburring on the front, rear, left and right of the processing target.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the surface treatment apparatus of Example 1 of this invention, (A) is the external appearance perspective view which shows the whole structure, (B) is the top view which looked at the said (A) from the upper direction. It is the side view which looked at the above-mentioned Drawing 1 (A) from the direction of arrow F2. It is a perspective view which expands and shows the structure by the side of the drive of the wiper mechanism of the surface treatment apparatus of the said Example 1. FIG. It is a perspective view which expands and shows the structure by the side of the guide of the wiper mechanism of the surface treatment apparatus of the said Example 1. FIG. It is a figure which shows the effect | action of the said Example 1. FIG. It is a figure which shows the other Example of this invention. It is a figure which shows an example of background art.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1A is an external perspective view showing the overall configuration of the surface treatment apparatus of the present embodiment, FIG. 1B is a plan view of FIG. 1A viewed from above, and FIG. It is the side view which looked at (A) from arrow F2. FIG. 3 is an enlarged perspective view showing the structure on the drive side of the wiper mechanism of the surface treatment apparatus of the present embodiment, and corresponds to a view of FIG. 1A viewed from the direction of arrow F3. FIG. 4 is an enlarged perspective view showing the structure on the guide side of the wiper mechanism. FIG. 5 is a diagram illustrating the operation of the present embodiment. The surface treatment apparatus of the present invention is an apparatus for performing deburring of edges of various metal products and molded products, polishing treatment of stainless steel plates and hairline processing, etc. Also, those having a slight unevenness are included. In the present embodiment, the case of deburring the edges of metal products and molded products will be described as an example.

  As shown in FIGS. 1 and 2, the surface treatment apparatus 10 according to the present embodiment has a main body frame 12 with two conveyors 22 for conveying the workpiece W and two surface treatments (burr removal etc.) of the workpiece W. It is the structure provided with rotating brush 40A, 40B. The main body frame 12 includes a lower frame 14 and a pair of side frames 18 and 20 disposed on the left and right sides of the conveyor 22. The lower frame 14 and the side frames 18 and 20 are configured by assembling a plurality of frame materials. Further, a leg 16 with casters is provided on the bottom surface of the lower frame 14, and the entire surface treatment apparatus 10 is movable. In addition, the main body frame 12 is provided with a brush drive mechanism for rotationally driving the rotary brushes 40A and 40B, and a wiper mechanism for operating the rotary brushes 40A and 40B with a wiper as a fulcrum. It has been. The wiper operation referred to in the present invention means that the rotary brushes 40A and 40B are repeatedly operated in a fan shape with one end side as a fulcrum, and the wiper mechanism is a mechanism that repeatedly operates in such a fan shape. In the present embodiment, the wiper mechanism is constituted by motor-side wiper driving portions 90A and 90B and non-motor-side wiper guide portions 110A and 110B of the rotating brushes 40A and 40B.

  The conveyor 22 conveys the workpiece W in the direction indicated by the arrow F1 in FIG. The conveyor 22 is driven by a conveyor motor 26, and its conveyor mechanism is known. In addition, a large number of round holes or long holes for attracting and holding the work W on the transport surface 24 are formed on the transport surface 24 of the transport conveyor 22. Below the conveyor 22, a workpiece suction duct 28 for attracting and holding the workpiece W and a conveyor lifting motor 30 for lifting the conveyor 22 are provided. By raising and lowering the conveyor 22 by driving the conveyor lifting motor 30, the distance between the conveyor surface 24 and the rotating brushes 40A and 40B can be adjusted according to the thickness of the workpiece W.

  Next, the rotation drive mechanism of the rotary brushes 40A and 40B and the wiper drive units 90A and 90B will be described. In this embodiment, the rotation driving mechanism of the rotating brushes 40A and 40B and the wiper driving units 90A and 90B are provided on the side frame 18 side. The rotary brushes 40 </ b> A and 40 </ b> B are arranged so as to be substantially orthogonal or non-parallel to the conveyance direction of the workpiece W and substantially parallel to the conveyance surface 24. Since the structures of the rotating brushes 40A and 40B are basically the same, the rotating brush 40A will be described below. As shown in FIGS. 1 and 3, the rotating brush 40A has a large number of brush bodies 44 on the surface of a substantially cylindrical roller 42, one end of which is connected to a shaft 60 by a brush fixing bracket 58, and the like. The end side is connected to a shaft 94 (see FIG. 1B) by a brush fixing bracket 92. In this embodiment, the brush body 44 is formed so as to be inclined at a predetermined angle (for example, about 7 to 20 °) with respect to a surface substantially orthogonal to the axial direction of the roller 42.

  One shaft 60 is rotatably supported by bearings 62 and 64 on a motor base 52A provided on the top plate 46 of the side frame 18. The other shaft 94 is rotatably supported by bearings 98 and 100 on a bearing base 96A provided on the top plate 48 of the side frame 20. In the present embodiment, the motor base 52A and the bearing base 96A are connected by a connecting shaft 54A for strength reinforcement. The structure on the shaft 94 side will be described later. Further, a brush motor 50A for rotating the rotary brush 40A is fixed on the motor base 52A. The brush motor 50 </ b> A is disposed such that its output shaft is substantially parallel to the shaft 60. A belt 70 is wound between a pulley 68 provided on the output shaft of the brush motor 50A and a pulley 66 provided on an end of the shaft 60, and the output of the brush motor 50A is transmitted to the shaft. 60.

  The motor base 52A is rotatably supported with respect to the top plate 46 by a base bearing 88 provided between the motor base 52A and the top plate 46 of the side frame 18. Then, a rotating brush is provided by a lot end 86 fixed to the motor base 52A, a cam 82 for transmitting a reciprocating motion to the lot end 86 via a lot end shaft 84, and a cam motor 80A for rotating the cam 82. A wiper driving unit 90A on the 40A side is formed. The cam motor 80 </ b> A is provided below the top plate 46. Then, by driving the cam motor 80A, the rotary brush 40A is wiped back and forth in the conveying direction of the workpiece W within a predetermined angle range with the base bearing 88 on the brush motor 50A side as a fulcrum.

  The rotating brush 40B side has the same configuration, and the rotating brush 40B is driven by the rotation of the brush motor 50B provided on the motor base 52B. The motor base 52B and the bearing base 96B are connected by a connecting shaft 54B. Further, a base bearing 88 on the motor 50B side is supported by a base bearing 88, a lot end 86, a lot end shaft 84, a cam 82, and a cam motor 80B provided between the motor base 52B and the top plate 46. The wiper operation of the rotating brush 40B can be performed.

  Next, the guide side of the wiper mechanism will be described. The wiper guide portions 110 </ b> A and 110 </ b> B are provided on the top plate 48 of the other side frame 20. As shown in FIG. 4, a wiper operation bearing 106A for guiding the wiper operation is provided on the bottom surface of a bearing base 96A to which bearings 98 and 100 supporting a shaft 94 connected to the rotating brush 40A are fixed. ing. A bearing guide 102A having a groove 104 that engages with the wiper actuation bearing 106A is provided on the top plate 48. The groove 104 is formed in the same curve as a substantially arc-shaped locus drawn by the end of the shaft 94 when the wiper of the rotating brush 40A is operated. The wiper guide portion 110A of the rotating brush 40A is formed by the bearing guide 102A, the wiper operating bearing 106A, and the bearing base 96A. Similarly, on the rotating brush 40B side, the wiper guide portion 110B is formed by the bearing guide 102B, the wiper operating bearing 106B, and the bearing base 96B.

  Next, the operation of this embodiment will be described. First, the height of the conveyor 22 is adjusted according to the thickness of the workpiece W by driving the conveyor lifting / lowering motor 30 as necessary. Then, the brush motors 50A and 50B are driven to rotate the rotary brush 40A on the inlet side of the workpiece W in the direction indicated by the arrow F2a in FIG. Is driven to rotate in the direction indicated by the arrow F2b. Further, the cam motors 80A and 80B are driven, and the rotary brushes 40A and 40B are wiped in the direction of the arrow F4. When the cam motors 80A and 80B are driven, the cam 82 rotates. In this embodiment, the cam angle is set to 14 °, for example. The rotation of the cam 82 causes the lot end 86 fixed to the motor bases 52A and 52B to reciprocate via the lot end shaft 84 to drive the motor bases 52A and 52B. Since the motor bases 52A and 52B are rotatably supported on the top plate 46 by the base bearings 88, the wiper operation of 14 ° is repeated.

  On the other hand, on the non-motor side of the rotating brushes 40A and 40B, the wiper operating bearings 106A and 106B provided below the bearing bases 96A and 96B perform the wiper operation in a substantially arc shape along the grooves 104 of the bearing guides 102A and 102B. repeat. As a result, the entire rotating brushes 40A and 40B operate as wipers in the direction indicated by the arrow F4 in FIGS. Note that vibration during rotation of the various motors and the rotating brushes 40A and 40B is prevented by the base bearing 88, the bearing guides 102A and 102B, and the wiper operating bearings 106A and 106B. And it supplies with electricity to the motor 26 for conveyors, and the conveyance conveyor 22 is driven to the direction shown by the arrow F1 in FIG. Further, the work W on the transport surface 24 of the transport conveyor 22 is sucked and held by the work suction duct 28 by a round hole or the like provided on the transport surface 24.

  When the work W is placed on the transport conveyor 22 in such a state, the work W moves in the direction of the arrow F1 while being sucked and held on the transport surface 24, and passes under the rotating brushes 40A and 40B. At this time, the brush body 44 of the rotating brushes 40A and 40B that are rotating in the directions of the arrows F2a and F2b and operating the wiper in the direction F4 hits the surface of the workpiece W to perform deburring. As described above, the rotating brushes 40A and 40B are repeatedly operated in a fan shape (wiper motion), so that the brush hitherto determined by the speed of the conveyor 22 and the rotational speed of the rotating brushes 40A and 40B hits. , Deburring frequency by wiper movement is added. Further, as shown in FIG. 5A, since the angle at which the rotating brushes 40A and 40B hit the work W changes, not only the front and rear of the work W but also the left and right (width direction) burrs can be uniformly removed.

  As shown in FIG. 5A, the rotary brushes 40A and 40B reciprocate (wiper motion) so that the non-motor side draws an arc with the base bearings 88 and 50B of the brush motor 50A as fulcrums. ) The wiper motion angle θ is, for example, about 10 to 20 °, and the reciprocating motion of the rotating brushes 40A and 40B is about 1 to 2 times / second. As in the background art shown in FIG. 7, when there is no wiper movement of the rotating brush, the workpiece W moves and hits the rotating brush once to remove burrs on the workpiece W. On the other hand, when the wiper movement is performed as in the present embodiment and the movement of the workpiece W by the conveyor 22 is 1.5 m / min, the workpiece W moves about 25 mm per second. When the angle θ at which the rotary brushes 40A and 40B perform the wiper motion is 10 degrees, the distance D at which the rotary brushes 40A and 40B hit the workpiece W and deburr is about 150 mm. If one reciprocation is 1 second, the rotary brushes 40A and 40B hit the work W six times each in reciprocation. In addition, since the angle at which the rotating brushes 40A and 40B strike the workpiece W also changes, burrs can be uniformly removed on the entire circumference (front and rear, left and right) of the workpiece W.

  As shown in FIG. 5 (A), the wiper movement of the rotating brushes 40A and 40B moves around the line L substantially perpendicular to the transport direction of the transport conveyor 22 by the same angle before and after the transport direction. However, it may be driven as shown in FIG. 5B or 5C. The example shown in FIG. 5 (B) is an example in which the rotating brushes 40A and 40B perform a wiper movement on the entrance side of the conveyor 22 so as not to exceed the line L. FIG. In this example, the rotating brushes 40A and 40B are wiped on the exit side of the conveyor 22 so as not to exceed the line L. In this embodiment, both the rotating brushes 40A and 40B are wiper-moved as shown in FIG. 5A. However, only one of the rotating brushes is wiped-moved as necessary. Alternatively, the wiper motion of the rotating brush 40A and the rotating brush 40B may be different from any one of FIGS. 5 (A) to 5 (C).

Thus, according to the first embodiment, there are the following effects.
(1) The rotating brushes 40A and 40B provided on the conveyor 22 that conveys the workpiece W are operated with a wiper so that the brush motors 50A and 50B are fulcrums and the non-motor side reciprocates back and forth in the conveying direction. As a result, the angle at which the rotating brushes 40A and 40B hit the workpiece W changes, and deburring of the entire circumference of the workpiece W can be performed uniformly.
(2) Since the brush bodies 44 of the rotating brushes 40A and 40B are inclined with respect to the surface orthogonal to the axial direction of the roller 42, the deburring effect is enhanced in combination with the wiper motion described above.
(3) Since the base bearing 88 is used for the wiper driving portions 90A and 90B, and the bearing guides 102A and 102B and the wiper operating bearings 106A and 106B are used for the wiper guide portions 110A and 110B, the motor And vibrations caused by the rotating brushes 40A and 40B can be absorbed.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shape and size of each part shown in the above-described embodiment is an example, and can be appropriately changed as necessary.
(2) In the above embodiment, the pair of rotating brushes 40A and 40B are provided substantially in parallel, but this is also an example, and only one of the rotating brushes may be used, or three or more. Alternatively, a rotating brush may be used. When two or more brushes are provided, at least one brush may be operated as a wiper.

  (3) In the above embodiment, the brush motors 50A and 50B of the rotating brushes 40A and 40B are arranged on the side frame 18 side, and the wiper drive is performed on the brush motors 50A and 50B side. Is an example, and may be changed as necessary. For example, as shown in FIG. 6 (A-1), a brush motor 50A for the rotary brush 40A is provided on the side frame 20, and a brush motor 50B for the rotary brush 40B is provided on the side frame 18, and these brush motors 50A, By driving the 50B side, the rotary brushes 40A and 40B may be wiped as shown in FIG. 6A-2. In the example of FIG. 6A-2, the rotating brush 40A is driven as shown in FIG. 5C, and the rotating brush 40B is driven as shown in FIG. 5B. However, this is also an example, and may be appropriately changed according to the distance between the rotating brushes 40A and 40B. 6A-1 and 6A-2, it is provided between the motor bases 52A, 52B and the bearing bases 96A, 96B in order to facilitate understanding of the wiper operation of the rotating brushes 40A, 40B. Although illustration of connection shaft 54A, 54B was abbreviate | omitted, you may make it provide a connection shaft similarly to the said Example 1 as needed. In FIGS. 6A-1 and 6A-2, the positions of the brush motors 50A and 50B are also different from those in the first embodiment. However, this is also an example, and the arrangement of the motors is as follows. It can be appropriately changed as necessary.

(4) In the above-described embodiment, before the wiper is driven, the rotating brushes 40A and 40B are arranged so as to be substantially orthogonal to the conveying direction of the workpiece W. However, this is also an example, and FIG. As in the example shown in -1), it may be installed so as to be inclined with respect to the transport direction before the wiper is driven. Further, in this case, the wiper drive is also performed in the example shown in FIG. 6B-2, in which both drive parts of the rotating brushes 40A and 40B are on the same end side, but in FIG. It does not prevent driving as in the example shown.
(5) In the above embodiment, the combination of the cam 82 and the lot end 86 is used for the wiper drive units 90A and 90B. However, this is also an example, and the wiper drive may be performed by an air cylinder and an electric cylinder. .

(6) In the above-described embodiment, the brush motors 50A, 50B side is the drive side of the wiper mechanism, but this is also an example, and the brush motors may be driven on the non-motor side.
(7) In the above embodiment, the brush body 44 of the rotary brushes 40A and 40B is inclined with respect to the plane orthogonal to the axial direction of the roller 42. However, this is also an example, and the axial direction of the roller 42 A vertical brush in which the brush body 44 is provided in a direction orthogonal thereto may be used. Moreover, when using it as an inclination brush, the angle can be suitably changed as needed.
(8) In the above embodiment, the surface treatment apparatus of the present invention is used for deburring of the object to be treated, but this is also an example. It can be applied to various known surface treatments such as polishing.

  According to the present invention, the rotating brush provided on the conveying means for conveying the object to be processed has the one end side of the rotating shaft as a fulcrum, and the other end side is in front of and behind the conveying direction while maintaining a substantially parallel state with respect to the conveying surface. Since the wiper is operated so as to draw an arc, it can be applied to the use of a surface treatment apparatus that performs surface treatment of a treatment target. In particular, since deburring of the front, rear, left and right of the processing target can be performed uniformly, it is suitable for the use of a deburring apparatus.

10: Surface treatment device 12: Main body frame 14: Lower frame 16: Legs 18, 20: Side frame 22: Conveyor 24: Conveying surface 26: Conveyor motor 28: Workpiece suction duct 30: Conveyor lifting motor 40A, 40B: Rotating brush 42: Roller 44: Brush body 46, 48: Top plate 50A, 50B: Brush motor 52A, 52B: Motor base 54A, 54B: Connection shaft 58: Brush fixing bracket 60: Shaft 62, 64: Bearing 66, 68 : Pulley 70: Belt 80A, 80B: Motor for cam 82: Cam 84: Lot end shaft 86: Lot end 88: Bearing for base 90A, 90B: Wiper drive part 92: Brush fixing bracket 94: Shaft 96A, 96B: Bearing base 98, 100: Bearing 102A , 102B: Bearing guide 104: Grooves 106A, 106B: Wiper operating bearings 110A, 110B: Wiper guide part 200: Rotating brush 202: Shaft 204: Motor 206: Bearing 208: Conveyor W: Workpiece

Claims (5)

Transport means for transporting the processing object in a predetermined direction;
On the conveying means, it is non-parallel to the conveying direction of the processing object and is arranged substantially parallel to the conveying surface of the conveying means, and the surface treatment is performed in contact with the processing object. At least one rotating brush to perform,
A rotation driving means provided on one end side of the rotating shaft of the rotating brush, for rotating the rotating brush;
A bearing provided on the other end of the rotating shaft;
A wiper that repeats the rotating brush in a fan shape while maintaining a substantially parallel state with respect to the conveying surface so that one end side of the rotating shaft is a fulcrum and the other end side of the rotating shaft forms an arc in the front-rear direction of the conveying direction. Wiper mechanism operated,
A surface treatment apparatus comprising: The wiper mechanism is
A drive means which is provided on one end side of the rotating shaft of the rotating brush, and which wipes the rotating brush with the one end side as a fulcrum;
A guide means provided on the other end side of the rotary shaft for guiding the wiper operation of the rotary brush;
The surface treatment apparatus according to claim 1, further comprising: Both end sides of the rotating shaft of the rotating brush are rotatably supported by bearings on a base that can move with respect to the upper surface of the main body frame of the surface treatment device,
The surface treatment apparatus according to claim 2, wherein a base on one end side of the rotating shaft is driven by the driving unit. The drive means
A lot end fixed to the base;
A cam that transmits reciprocating motion to the lot end via the lot end shaft;
Cam drive means for rotating the cam;
A bearing for a base provided between the upper surface of the base and the main body frame, and rotatably supporting the base with respect to the upper surface of the main body frame;
The surface treatment apparatus according to claim 3, further comprising: The guide means comprises:
A bearing for a wiper operation guide provided on the bottom side of the base on the other end side of the rotating shaft,
A groove engaging with the bearing is formed in a substantially arc shape, and a bearing guide provided on the upper surface of the main body frame;
The surface treatment apparatus according to claim 3, wherein the surface treatment apparatus includes:

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