Scraping device

Abstract

To provide a scraping device that can efficiently perform scraping.SOLUTION: A scraping device 1 includes: a base 2 placed on a workpiece 90; a motor 31 installed to the base 2; a plurality of advancing and retreating parts 4 provided so as to be capable of advancing and retreating forward oblique downward that is a processing direction relative to the base 2 and arranged in an orthogonal direction that is horizontally orthogonal to the processing direction; a conversion mechanism 5 for converting the rotational motion of the motor 31 into advancing and retreating motions of the respective advancing and retreating parts 4; and a plurality of scraping blades 6 provided to the respective advancing and retreating parts 4 pressing onto a processed surface 91 when the advancing and retreating parts 4 advance.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a scraping device. [Background technology]

[0002] Patent Document 1 discloses a scraping device that performs scraping to create multiple recesses with micron-level depths on a flat work surface. This scraping device includes a motor, an eccentric crank pin, a slide block that can reciprocate diagonally back and forth, a scraping rod that reciprocates along an arcuate trajectory together with the slide block, and a scraping blade fixed to the tip of the scraping rod. When the motor is rotated, the crank pin rotates eccentrically, causing the scraping rod to reciprocate diagonally back and forth together with the slide block along an arcuate trajectory. As a result, the work surface is scraped by the scraping blade. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-063817 Summary of the Invention [Problem to be solved by the invention]

[0004] The scraping device described above processes the surface using only one scraping blade, which means that when the surface to be processed is large, there is a problem of poor processing efficiency. In view of the above problem, an object of the present disclosure is to provide a scraping device that can perform scraping processing efficiently. [Means for solving the problem]

[0005] (1) The scraping device disclosed herein is a scraping device that scrapes the machining surface of a workpiece, and includes a base that is placed on the workpiece, a motor provided on the base, a plurality of advancing and retreating parts that are provided on the base so as to be able to advance and retreat in a downward forward direction, which is the machining direction, and are arranged in an orthogonal direction that is horizontally perpendicular to the machining direction, a conversion mechanism that converts the rotational motion of the motor into advancing and retreating motion of each of the advancing and retreating parts, and a plurality of scraping blades that are provided on each of the advancing and retreating parts and are pressed against the machining surface when the advancing and retreating part advances.

[0006] According to the scraping device of the present disclosure, when the motor is driven with the base placed on the workpiece, each of the multiple advancing and retreating parts advances diagonally downward (in the processing direction) relative to the base via the conversion mechanism, and the scraping blades provided on each advancing and retreating part are pressed against the processing surface. This allows scraping processing to be performed on the processing surface with the multiple scraping blades, making scraping processing efficient.

[0007] (2) In the scraping device of (1) above, it is preferable that the conversion mechanism converts the motion of the plurality of advancing and retreating parts so that they advance and retreat one by one in response to the rotation of the motor. In this case, the rotation of the motor causes the multiple advance / retract parts to advance and retreat one by one, allowing the multiple scraping blades to be pressed against the processing surface one by one. This reduces the force required to press the scraping device against the processing surface compared to when multiple scraping blades are pressed against the processing surface at the same time, making scraping easier.

[0008] (3) In the scraping device of (2), the conversion mechanism preferably comprises a plurality of elastic members that bias each of the advancing and retreating parts toward the retreating side relative to the base, a plurality of follower rings that are rotatably provided at the retreating end of each of the advancing and retreating parts about a first axis extending in the perpendicular direction, a plurality of cam rings that are rotatably provided about a second axis parallel to the first axis relative to the base and have eccentric cam surfaces that protrude radially outward and contact the outer circumferential surfaces of each of the follower rings, and a rotary shaft that is rotatably provided about the second axis relative to the base and is rotationally driven by the motor, and the plurality of cam rings are preferably fixed to the rotary shaft with the eccentric cam surfaces eccentric at a predetermined phase difference in the circumferential direction of the rotary shaft so that the plurality of advancing and retreating parts advance and retreat one by one during one rotation of the rotary shaft.

[0009] In this case, when the rotary shaft is driven to rotate by a motor, the eccentric cam surfaces of the multiple cam rings rotate while maintaining a predetermined phase difference. In the rotation range in which the eccentric cam surface of each cam ring rotates while pressing the follower ring, each of the advancing and retreating sections can be advanced diagonally downward toward the front of the base against the biasing force of the elastic member. In the rotation range in which the eccentric cam surface of each cam ring rotates without pressing the follower ring, each of the advancing and retreating sections can be retracted by the biasing force of the elastic member. Therefore, with each rotation of the rotary shaft, the multiple advancing and retreating sections advance and retract one by one, allowing the multiple scraping blades to be pressed against the processing surface one by one. This makes scraping even more efficient and easier.

[0010] (4) In any of the scraping devices (1) to (3), the advancing / retreating section preferably has an advancing / retreating member mounted on the base so as to be able to advance and retreat, a swinging member mounted at the advancing end of the advancing / retreating member so as to be able to swing about an axis extending in the perpendicular direction and having the scraping blade mounted at the swinging tip, and a mitigating member mounted between the advancing / retreating member and the swinging member to mitigate the force with which the scraping blade presses against the work surface. In this case, when the advancing / retracting member advances relative to the base, the scraping blade provided at the swinging tip of the swinging member is pressed against the work surface. At that time, the force pressing the scraping blade against the work surface can be reduced by the mitigating member. This makes it possible to prevent the scraping blade from biting into the work surface excessively.

[0011] (5) In any of the scraping devices (1) to (4), it is preferable that the base has a base body and a sphere that is rotatably held relative to the base body with at least a portion of the sphere protruding downward from the base body. In this case, when the base is placed on the workpiece, the sphere comes into rolling contact with the workpiece, allowing the base to be easily moved along the workpiece. Furthermore, when the sphere comes into contact with the workpiece, the base body floats above the workpiece. This allows the angle at which the scraping blade presses against the workpiece's surface to be easily adjusted by swinging the base body together with the retractable part about the center point of the sphere. [Effects of the Invention]

[0012] According to the scraping device of the present disclosure, scraping can be performed efficiently. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view showing a scraping device according to an embodiment of the present disclosure. [Figure 2] FIG. 4 is a side view showing the scraping device in use. [Figure 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the arrow II in FIG. 3. [Figure 5] FIG. 2 is a cross-sectional view taken along the line II-II in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along the line III-III in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0014] Preferred embodiments of the present disclosure will now be described with reference to the drawings. [Overall configuration of scraping device] FIG. 1 is a perspective view showing a scraping device 1 according to an embodiment of the present disclosure. FIG. 2 is a side view showing the scraping device 1 in use. FIG. 3 is a plan view of the scraping device 1. In FIGS. 1 to 3, the scraping device 1 of this embodiment performs scraping to form a large number of recesses with a depth measured in μm on a flat processing surface 91 of a workpiece 90. The scraping device 1 includes a base 2, a drive unit 3, multiple advance / retreat units 4, a conversion mechanism 5, and multiple scraping blades 6. Hereinafter, in this specification, directions such as "up," "down," "right," "left," "front," and "rear" refer to the directions shown in FIG. 1.

[0015] The base 2 is placed on the workpiece 90. The base 2 in this embodiment is formed in a box shape with both the front and rear sides open. Specifically, the base 2 includes a base main body 21 disposed at the bottom, a pair of left and right side walls 22, 23, and a top wall 24. The base main body 21 is disposed above the workpiece 90 and adjacent to the processing surface 91.

[0016] The top wall 24 is provided with a first handle 11 and a second handle 12 to be grasped by an operator. The first handle 11 is, for example, a cantilever handle, and is fixed to the rear side of the upper surface of the top wall 24. The second handle 12 is, for example, a U-shaped round bar handle, and is fixed to the front side of the upper surface of the top wall 24. The operator grasps the first handle 11 with the fingers of one hand and the second handle 12 with the fingers of the other hand.

[0017] The drive unit 3 includes a motor 31, a control unit 32, and a transmission mechanism 33. The motor 31 is fixed to the base body 21 while being disposed behind the base 2. The motor 31 has an output shaft (not shown) that rotates around an axis extending in the front-to-rear direction. The control unit 32 controls the rotation speed and other parameters of the motor 31. The control unit 32 is provided, for example, on the right side of the motor 31.

[0018] A rotating shaft 53 (described later) of the conversion mechanism 5 is connected to the output shaft of the motor 31 via a reducer (not shown) and a transmission mechanism 33. The reducer is disposed inside the base 2. The transmission mechanism 33 is disposed, for example, on the right outer side of the side wall 22 of the base 2. The transmission mechanism 33 has a drive gear 34 and a driven gear 35 that meshes with the drive gear 34. The drive gear 34 and the driven gear 35 are each rotatable around an axis extending in the left-right direction.

[0019] The drive gear 34 is connected to the output shaft of the motor 31 via the reducer. The driven gear 35 is disposed in front of the drive gear 34 and is connected to the rotation shaft 53 of the conversion mechanism 5. As a result, the rotation of the motor 31 is reduced by the reducer and then transmitted to the rotation shaft 53 of the conversion mechanism 5 via the transmission mechanism 33. In this embodiment, the motor 31 rotates at approximately 1000 to 1500 rpm, and the rotation is reduced to approximately 200 to 300 rpm by the reducer.

[0020] The multiple (three in this example) advancing / retreating units 4 are arranged side by side on the front side of the base 2 in an orthogonal direction (left-right direction) that is horizontally perpendicular to the processing direction (the cutting direction of the scraping blade 6), which is diagonally downward toward the front. Each advancing / retreating unit 4 is provided so as to be able to advance and retreat between an advanced position advanced diagonally downward toward the front and a retreated position retreated diagonally upward toward the rear with respect to the base main body 21. In the state shown in Figures 1 and 3, for convenience, the rightmost advancing / retreating unit 4 is in the advanced position, and the other two advancing / retreating units 4 are in the retreated positions. Hereinafter, the direction in which the advancing / retreating units 4 advance and retreat is referred to as the "advancing / retreating direction" (see Figure 4).

[0021] The conversion mechanism 5 converts the rotational motion of the motor 31 into the advance / retract motion of each of the advancing / retracting units 4. The conversion mechanism 5 of this embodiment converts the motion so that the multiple advancing / retracting units 4 advance and retreat one by one as the motor 31 rotates. Multiple scraping blades 6 are individually provided on each of the advancing / retracting units 4. Each scraping blade 6 is pressed against the processing surface 91 when the advancing / retracting unit 4 advances. As a result, scraping processing is performed on the processing surface 91 by each of the multiple scraping blades 6.

[0022] [Advance / retreat section] Fig. 4 is a cross-sectional view taken along the line II in Fig. 3. In Figs. 1 to 4, the base 2 has a rectangular parallelepiped support body 25 that protrudes obliquely upward and forward from the front end of the base main body 21. The support body 25 is formed long in the left-right direction and supports each of the multiple advancing and retreating units 4 so that they can advance and retreat. The support body 25 has a plurality of first through holes 25a and a plurality of second through holes 25b formed at equal intervals in the left-right direction.

[0023] The number of first through holes 25a and second through holes 25b is the same as the number of advancing / retreating sections 4. The multiple first through holes 25a are formed penetrating in the advancing / retreating direction on the upper side of support body 25. The multiple second through holes 25b are formed penetrating in the advancing / retreating direction on the lower side of support body 25 at positions corresponding to each of the first through holes 25a.

[0024] Each advancing / retreating section 4 comprises an advancing / retreating member 41 that is movable forward and backward on the support body 25, a swinging member 42 that is swingably mounted on the forward end of the advancing / retreating member 41, and a buffer member 43 that is mounted between the advancing / retreating member 41 and the swinging member 42.

[0025] The reciprocating member 41 has a pair of slide bars 44, 45, a rear bracket 46 provided at the retracting ends of both slide bars 44, 45, and a front bracket 47 provided at the advancing ends of both slide bars 44, 45.

[0026] Each of the slide rods 44, 45 is formed in a round rod shape. Each of the slide rods 44, 45 is inserted into a first through hole 25a and a second through hole 25b that are adjacent to each other on the top and bottom of the support body 25. Specifically, one of the slide rods 44 is inserted into the first through hole 25a of the support body 25 so as to be slidable in the forward and backward direction. The other slide rod 45 is inserted into the second through hole 25b of the support body 25 so as to be slidable in the forward and backward direction. As a result, the pair of slide rods 44, 45 are slidable in the forward and backward direction relative to the support body 25 while being arranged parallel to each other.

[0027] The rear bracket 46 has a bottom plate 46a, a pair of left and right side plates 46b extending from the bottom plate 46a toward the rearward side, and a fixed shaft 46c disposed between the pair of side plates 46b. The bottom plate 46a is fixed to both slide bars 44, 45 by a pair of upper and lower bolts 48 while abutting against the rearward end faces of both slide bars 44, 45. The fixed shaft 46c extends in the left-right direction. Both left and right ends of the fixed shaft 46c are fixed to the pair of side plates 46b.

[0028] The front bracket 47 has a bottom 47a, a pair of flanges 47b protruding toward the forward movement side from both left and right sides of the lower end of the bottom 47a, and a fixed shaft 47c disposed between the pair of flanges 47b. The bottom 47a is formed in a rectangular parallelepiped shape that is long in the vertical direction. The lower side of the bottom 47a is fixed to the forward movement side end faces of the slide bars 44, 45 by a pair of upper and lower bolts 49 while abutting against the forward movement side end faces of the slide bars 44, 45. A recessed groove 47d that opens at the forward movement side end face is formed on the upper side of the bottom 47a. The fixed shaft 47c extends in the horizontal direction. Both left and right ends of the fixed shaft 47c are fixed to the pair of flanges 47b.

[0029] The swinging member 42 is disposed on the forward side of the front bracket 47. The swinging member 42 is formed in an L-shape in a side view. The swinging member 42 has a swinging main body portion 42a and an attachment portion 42b that protrudes from the lower end of the swinging main body portion 42a toward the forward side. The lower end of the swinging main body portion 42a is swingably supported by a fixed shaft 47c of the front bracket 47. Therefore, the swinging member 42 can swing around the axis of the fixed shaft 47c that extends in the left-right direction relative to the front bracket 47.

[0030] An abutment surface 42c is formed on the rearward side of the lower end of the swing body 42a, which abuts against the forward end face of the front bracket 47. In the state shown in Fig. 4, the abutment surface 42c abuts against the end face of the front bracket 47, restricting the swing member 42 from swinging in the counterclockwise direction in the figure. Therefore, in the state shown in Fig. 4, the swing member 42 is allowed to swing only in the clockwise direction.

[0031] A recessed groove 42d that opens at the end face on the retreating side is formed on the upper side of the swinging main body 42a. The recessed groove 42d of the swinging main body 42a faces the recessed groove 47d of the front bracket 47. The mounting portion 42b is formed so as to taper toward the forward moving side. A fitting groove 42e is formed on the tip side (forward moving side) of the upper surface of the mounting portion 42b. The base of the scraping blade 6 is fitted into the fitting groove 42e.

[0032] A plate 7 is placed on the upper surface of the mounting portion 42b so as to cover the base of the scraping blade 6 from above. The plate 7 is fixed to the mounting portion 42b with bolts 8. As a result, the scraping blade 6 fitted into the fitting groove 42e is held in a sandwiched state between the plate 7 and the mounting portion 42b.

[0033] The relaxation member 43 is a member that relaxes the force that presses the scraping blade 6 against the processing surface 91. In this embodiment, the relaxation member 43 is a compression coil spring. The forward-moving end of the relaxation member 43 is fitted into the recessed groove 42d of the swinging member 42 and abuts against the bottom surface of the recessed groove 42d. The backward-moving end of the relaxation member 43 is fitted into the recessed groove 47d of the front bracket 47 and abuts against the bottom surface of the recessed groove 47d.

[0034] The urging force (spring force) of the relaxation member 43 constantly urges the swinging member 42 in a direction away from the front bracket 47 (counterclockwise direction in FIG. 4). In the state shown in FIG. 4, as described above, the abutment surface 42c of the swinging member 42 abuts against the front bracket 47, thereby restricting the swinging member 42 from swinging in the counterclockwise direction. Therefore, the swinging member 42 is held in the state shown in FIG. 4.

[0035] When the scraping blade 6 is pressed against the processing surface 91 from the state shown in Fig. 4, the swinging member 42 swings clockwise in Fig. 4 relative to the front bracket 47 against the biasing force of the relaxation member 43. This relaxes the force pressing the scraping blade 6 against the processing surface 91. Note that the relaxation member 43 is not limited to a compression coil spring, and may be another elastic member such as a disc spring.

[0036] [sphere] 4, the base 2 includes spheres 26 rotatably held below the front end of the base main body 21. The spheres 26 are provided, for example, in pairs on both the left and right sides of the lower side of the base main body 21. A portion of each sphere 26 protrudes downward from the base main body 21. Therefore, when the base 2 is placed on the workpiece 90, each sphere 26 is in rolling contact with the workpiece 90, so that the base main body 21 is slightly floating above the workpiece 90. In this state, the base main body 21 can swing around the center point of each sphere 26.

[0037] [Conversion mechanism] Fig. 5 is a cross-sectional view taken along the line II-II in Fig. 2. In Fig. 4 and Fig. 5, the conversion mechanism 5 includes a plurality of elastic members 51 and a plurality of follower rings 52 provided on the advancing / retreating member 41, and a rotation shaft 53 and a plurality of cam rings 54 provided on the base 2.

[0038] Two elastic members 51 are provided for each advancing / retreating member 41. Therefore, the conversion mechanism 5 of this embodiment has a total of six elastic members 51. Each elastic member 51 is, for example, a compression coil spring. In each advancing / retreating member 41, the two elastic members 51 are individually inserted into both slide rods 44, 45 between the support body 25 and the rear bracket 46. Washers 55 are inserted into both axial sides of the elastic members 51 of each slide rod 44, 45. Each elastic member 51 constantly biases the advancing / retreating member 41 in the retracting direction relative to the support body 25 by its biasing force (spring force). Note that the elastic members 51 are not limited to compression coil springs and may be, for example, disc springs or the like.

[0039] The conversion mechanism 5 of this embodiment includes a total of three follower rings 52. One follower ring 52 is provided for each advancing / retreating member 41. Each follower ring 52 is rotatably supported by a fixed shaft 46c of the rear bracket 46 of the corresponding advancing / retreating member 41. This allows the follower ring 52 to rotate around the axis line (first axis line) C1 of the fixed shaft 46c extending in the left-right direction with respect to the retreating end of the advancing / retreating member 41, and to move forward and backward together with the advancing / retreating member 41.

[0040] The rotary shaft 53 is disposed on the rearward side of each of the advancing and retreating members 41, with its axis (second axis) C2 extending in the left-right direction. The second axis C2 of the rotary shaft 53 is disposed parallel to the first axis C1 of the fixed shaft 46c of the rear bracket 46. Both axial ends of the rotary shaft 53 penetrate through the side walls 22, 23 of the base 2 and are supported by rolling bearings 56. Each rolling bearing 56 is attached to a housing 57. Each housing 57 is fixed to the side walls 22, 23 by a plurality of bolts 58 (see also FIG. 2). As a result, the rotary shaft 53 is rotatable about the second axis C2 extending in the left-right direction relative to the side walls 22, 23 of the base 2.

[0041] The rotary shaft 53 has an extension 53a on one axial side (right side) thereof that extends further rightward than the housing 57. The driven gear 35 of the transmission mechanism 33 is fitted and fixed to the outer periphery of the extension 53a. As a result, when the motor 31 is rotated, the rotary shaft 53 is rotated via the transmission mechanism 33.

[0042] A plurality of cam rings 54 are provided on each of the rotation shafts 53 in the base 2. The number of cam rings 54 is the same as the number of follower rings 52. In other words, the conversion mechanism 5 of this embodiment has a total of three cam rings 54. These cam rings 54 are arranged side by side in the axial direction (left-right direction) of the rotation shafts 53, and are each arranged in a position facing each of the follower rings 52.

[0043] Each cam ring 54 has a cylindrical ring portion 54a and an annular cam portion 54b provided on the outer periphery of the ring portion 54a. The ring portion 54a is fitted and fixed to the outer periphery of the rotation shaft 53. As a result, each cam ring 54 is provided rotatably around the second axis C2 together with the rotation shaft 53 with respect to both side walls 22, 23 of the base 2.

[0044] Ring portion 54a is formed to be longer in the axial direction than follower ring 52. Both axial end faces of ring portion 54a of cam ring 54 located at the center in the axial direction abut against end faces of ring portions 54a of adjacent cam rings 54 on both the left and right sides. Cylindrical spacers 59 are fitted onto the outer periphery of rotary shaft 53 between the right cam ring 54 and right rolling bearing 56, and between the left cam ring 54 and left rolling bearing 56.

[0045] The cam portion 54b of each cam ring 54 is provided at the axial center of the outer periphery of the ring portion 54a and protrudes radially outward. The cam portion 54b is formed to be shorter in the axial direction than the follower ring 52. The outer periphery of the cam portion 54b is an eccentric cam surface 54c, the center X of which is eccentric with respect to the center (second axis C2) of the outer periphery of the ring portion 54a. Therefore, the eccentric cam surface 54c rotates eccentrically about the second axis C2. During rotation, the eccentric cam surface 54c protrudes most radially outward at the intersection P between the center X and an imaginary line K passing through the second axis C2. Hereinafter, the intersection P will be referred to as the maximum protrusion point P.

[0046] The outer peripheral surface of follower ring 52 is in contact with eccentric cam surface 54c of cam ring 54. Follower ring 52 is constantly urged toward the retreating side (toward cam ring 54) by the urging force of the pair of elastic members 51, 51, and therefore rotates while constantly in contact with eccentric cam surface 54c of cam ring 54. As a result, while cam ring 54 rotates once (360°) around second axis C2 due to the rotational drive of rotary shaft 53, follower ring 52 rotates while in contact with eccentric cam surface 54c, and thus advancing and retreating member 41 moves forward and backward.

[0047] Specifically, within a rotation range θ1 in which maximum protrusion point P of eccentric cam surface 54c of cam ring 54 rotates 180 degrees from the position indicated by the two-dot chain line in Figure 4 to the position indicated by the solid line, eccentric cam surface 54c rotates while pressing the outer circumferential surface of follower ring 52 forward. As a result, follower ring 52 rotates while pressing fixed shaft 46c of rear bracket 46 forward, and advancing / retracting member 41 gradually advances. When maximum protrusion point P of eccentric cam surface 54c reaches the position indicated by the solid line in Figure 4 where it contacts the outer circumferential surface of follower ring 52, advancing / retracting member 41 reaches its most advanced position.

[0048] Then, in a rotation range θ2 in which maximum protrusion point P of eccentric cam surface 54c of cam ring 54 rotates 180 degrees from the position shown by the solid line in Fig. 4 to the position shown by the two-dot chain line, eccentric cam surface 54c rotates so as to move away from the outer peripheral surface of follower ring 52, that is, so as not to press against the outer peripheral surface of follower ring 52. As a result, follower ring 52 rotates while being urged in the retracting direction by the urging force of the pair of elastic members 51, 51, and advancing / retreating member 41 gradually retracts. When maximum protrusion point P of eccentric cam surface 54c reaches the position shown by the two-dot chain line in Fig. 4, advancing / retreating member 41 reaches its most retracted position.

[0049] Figure 6 is a cross-sectional view taken along the line III-III in Figure 5. In Figures 5 and 6, the three cam rings 54 are fixed to the rotary shaft 53 with the maximum protruding points P of their eccentric cam surfaces 54c spaced equally apart in the circumferential direction of the rotary shaft 53. In other words, the three cam rings 54 are fixed to the rotary shaft 53 with the eccentric cam surfaces 54c of each cam ring 54 eccentrically spaced 120° apart in the circumferential direction of the rotary shaft 53.

[0050] Therefore, while the rotary shaft 53 makes one rotation, the eccentric cam surfaces 54c of the three cam rings 54 each rotate once while maintaining a phase difference of 120°, causing the three advancing and retreating members 41 to advance and retreat one by one. As a result, while the rotary shaft 53 makes one rotation, the three scraping blades 6 can be pressed against the processing surface 91 one by one to perform scraping.

[0051] Here, "advancing and retreating one by one" means not only a case where one advancing / retreating member 41 retreats to the retreated position and then another advancing / retreating member 41 starts advancing, but also a case where one advancing / retreating member 41 starts advancing while the other advancing / retreating member 41 is retreating to the retreated position or advancing to the advanced position. This embodiment corresponds to the latter case.

[0052] [Action and effect] According to the scraping device 1 of this embodiment, when the motor 31 is driven with the base 2 placed on the workpiece 90, each of the multiple advancing and retracting members 41 advances diagonally downward (in the processing direction) relative to the base body 21 via the conversion mechanism 5. When each advancing and retracting member 41 advances, the scraping blades 6 provided on each advancing and retracting member 41 are pressed against the processing surface 91. This allows scraping processing to be performed on the processing surface 91 by the multiple scraping blades 6, making it possible to perform scraping processing efficiently.

[0053] The conversion mechanism 5 converts the motion of the multiple advancing and retreating members 41 so that they move forward and backward one by one as the motor 31 rotates, so that the multiple scraping blades 6 can be pressed one by one against the processing surface 91. This reduces the force required to press the scraping device 1 toward the processing surface 91 compared to when multiple scraping blades 6 are pressed against the processing surface 91 simultaneously, making scraping easier.

[0054] When the motor 31 rotates the rotary shaft 53, the eccentric cam surfaces 54c of the multiple cam rings 54 rotate while maintaining a phase difference of 120°. During this rotation, the eccentric cam surface 54c of each cam ring 54 rotates while pressing the follower ring 52 in a rotation range θ1, thereby advancing each of the advancing and retracting members 41 against the biasing force of the pair of elastic members 51. Then, during the remaining rotation range θ2, during which the eccentric cam surface 54c of each cam ring 54 rotates without pressing the follower ring 52, each of the advancing and retracting members 41 can be retracted by the biasing force of the elastic members 51. Therefore, with each rotation of the rotary shaft 53, the multiple advancing and retracting members 41 advance and retract one by one, allowing the multiple scraping blades 6 to be pressed against the processing surface 91 one by one. This allows scraping to be performed more efficiently and easily.

[0055] A relaxation member 43 is provided between the advancing / retreating member 41 and the swinging member 42 to relax the force pressing the scraping blade 6 against the processing surface 91. As a result, when the advancing / retreating member 41 is advanced relative to the base body 21 and the scraping blade 6 provided at the swinging tip of the swinging member 42 is pressed against the processing surface 91, the pressing force can be relaxed by the relaxation member 43. This makes it possible to prevent the scraping blade 6 from biting into the processing surface 91 excessively.

[0056] A sphere 26, part of which protrudes downward, is rotatably held on the base body 21. As a result, when the base body 21 is placed on the workpiece 90, the sphere 26 comes into contact with the workpiece 90 so as to be able to roll, allowing the base body 21 to be easily moved along the workpiece 90. Furthermore, when the sphere 26 comes into contact with the workpiece 90, the base body 21 is placed in a state of floating above the workpiece 90. As a result, by swinging the base body 21 together with the advancing and retracting member 41 about the center point of the sphere 26, the angle at which the scraping blade 6 is pressed against the processing surface 91 of the workpiece 90 can be easily adjusted.

[0057] [others] The scraping device 1 of this embodiment is used by an operator holding the first handle 11 and the second handle 12, but it may also be attached to the arm of a robot or the like. The configurations of the base 2 and the advancing / retreating unit 4 are not limited to those of this embodiment. The conversion mechanism 5 is not limited to the configuration of this embodiment as long as it can convert the rotational motion of the motor 31 into the advancing / retreating motion of the advancing / retreating unit 4. For example, the conversion mechanism 5 may convert the motion so that three or more advancing / retreating units 4 move forward and backward two by two.

[0058] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the above-described embodiments, but is defined by the claims, and includes all modifications within the meaning and scope equivalent to the configurations described in the claims. [Explanation of symbols]

[0059] 1 scraping device 2. Bass 4 Advancement and retreat section 5 Conversion mechanism 6 scraping blade 21 Base body 26 Sphere 31 Motor 41 Moving member 42 Swinging member 43 Relief member 51 Elastic member 52 Following 53 Rotation axis 54 Cam Ring 54c Eccentric cam surface C1 1st axis C2 2nd axis

Claims

1. A scraping device for scraping a work surface of a workpiece, a base placed on the workpiece; a motor provided on the base; a plurality of advancing and retreating units that are provided to be advancing and retreating in a downwardly forward direction, which is a processing direction, with respect to the base and that are arranged in an orthogonal direction that is horizontally orthogonal to the processing direction; a conversion mechanism that converts the rotational motion of the motor into the advance / retract motion of each of the advance / retract parts; a scraping device provided with a plurality of scraping blades provided on each of the advancing and retreating sections and pressed against the processing surface when the advancing and retreating sections advance;

2. The scraping device according to claim 1 , wherein the conversion mechanism converts the motion of the plurality of advancing and retreating parts so that they advance and retreat one by one in response to rotation of the motor.

3. The conversion mechanism is a plurality of elastic members that bias each of the advancing and retreating parts toward a retreating direction relative to the base; a plurality of follower rings provided at retreating end portions of the advancing and retreating portions so as to be rotatable about first axes extending in the perpendicular direction; a plurality of cam rings provided rotatably with respect to the base about second axes parallel to the first axes, the cam rings having eccentric cam surfaces projecting radially outward and contacting outer peripheral surfaces of the follower rings; a rotation shaft that is rotatably provided around the second axis relative to the base and is rotationally driven by the motor, 3. The scraping device according to claim 2, wherein the plurality of cam rings are fixed to the rotating shaft with the eccentric cam surfaces being eccentric at a predetermined phase difference in the circumferential direction of the rotating shaft so that the plurality of advancing and retreating parts advance and retreat one by one during one rotation of the rotating shaft.

4. The advancing and retreating portion is a reciprocating member provided on the base so as to be reciprocable; a swinging member provided at a forward end of the advancing / retreating member so as to be swingable about an axis extending in the perpendicular direction, the swinging member having the scraping blade at a swinging tip thereof; The scraping device according to claim 1 , further comprising: a buffer member provided between the advancing and retreating member and the swinging member, for buffering a force pressing the scraping blade against the processing surface.

5. The base is The base body and The scraping device according to claim 1 , further comprising: a spherical body rotatably held relative to the base body with at least a portion of the spherical body protruding downward from the base body.

Images