DEBURRING DEVICE
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to a deburring device that removes burrs generated when metal-sheet processing, such as a cutting operation and a punching operation or the like, is performed by a punch press and other various sheet-metal processing machines.
2. Description of the Related Art
[0002] A deburring device that removes burrs (deburrs) through a grinding process by a deburring head that performs wet high-speed rotation has been the mainstream of conventional deburring devices. In recent years, a deburring device including a plurality of roller-shaped brushes that perform dry low-speed rotation has also been used. The device performing the dry low-speed rotation has had difficulty in removing burrs of small-sized and/or loophole-shaped holes.
[0003] For example, a deburring device having the following configuration has been suggested. That is, the deburring device includes a turret that revolves about a vertical axis above a conveyor that transports works. A plurality of deburring heads
(for example, three deburring heads) is arranged at an eccentric position of the turret. Each of the deburring heads is composed of a plurality of radially extending abrasive rollers (for example, Patent Document 1) . The above deburring device performs a multidirectional deburring operation (i.e., a multidirectional deburring operation) through a combination of revolution and rotation of the deburring heads and rolling motion of the abrasive rollers, thereby achieving an effective deburring operation. In addition to the above, a deburring device that swings two roller-shaped brushes in a forward-reverse direction has also been suggested (for example, Patent Document 2).
[Patent Document 1] Japanese Patent No. 2843501

[Patent Document 2] Japanese Examined Patent Application Publication No. S49-9299
[0004] In the deburring device of the above Patent Document 1, a plurality of deburring heads each including radial abrasive rollers are provided to the turret, and the turret revolves the plurality of deburring heads. Accordingly, a planar area in which the plurality of deburring heads revolves is enlarged, which causes a problem in that the entire device is increased in size. The planar area can be reduced in some degree by omitting a revolution function or the like, however, the multidirectional deburring operation cannot be performed, and accordingly, the effective deburring operation cannot be achieved. Moreover, even if the revolution function is omitted, revolution ranges of the abrasive rollers arising from the rotation of each of the deburring heads are individually required, which leads to difficulty in sufficiently reducing the planar area. Due to limits of space in a factory, or the like, downsizing of the deburring device is strongly desired. In the deburring device of the Patent Document 2, since the two roller-shaped brushes swing in the forward-reverse direction, a small area is sufficient, however, a multidirectional deburring operation cannot be performed, thereby leading to difficulty in an effective deburring operation.
SUMMARY OF THE INVENTION
[0005] In order to overcome the problems described above, preferred embodiments of the present invention provide a deburring device that can effectively perform a deburring operation with a compact configuration. According to an embodiment of the present invention, the deburring device can be further downsized. According to yet another embodiment of the present invention, an effective deburring operation can be performed without damaging works.
[0006] According to an embodiment of the present invention, a deburring device includes a conveyor, a first deburring head, and a second deburring head. The conveyor transports works. The

first and second deburring heads are disposed above the conveyor and aligned in a transportation direction. Each of the deburring heads includes a plurality of horizontal spindles that laterally extend from a revolution center such that the spindles can revolve about the vertical revolution center, and includes deburring members each provided to the corresponding spindle. The deburring device further includes spindle rotation drive mechanisms arranged to rotate the spindles of each of the deburring heads and a deburring head revolution drive mechanism arranged to revolve the first and second deburring heads in synchronization in opposite directions from one another such that the first and second deburring heads do not interfere with each other in an overlap area in which the first and second deburring heads overlap in deburring member revolution areas arising from the revolution of the first and second deburring heads.
The above "plurality of horizontal spindles that laterally extend from the revolution center" means that a spindle is provided in each lateral area that is across a given straight line vertical to the revolution center, and that each of the spindles externally and horizontally extends from the revolution center. At least one spindle is required in each of the lateral areas, however, each of the lateral areas may include a different number of spindles. Each of the spindles is not necessarily required to extend in a radius direction, but may be parallel in the radius direction. For example, two spindles may be provided in each area and extend in parallel in a fork-teeth shape.
[0007] In the above configuration, while being transported on the conveyor, a work passes below the first and second deburring heads, and thus, burrs are sequentially removed by the deburring heads. At this time, each of the deburring heads performs a revolution operation in which the laterally arranged deburring members revolve and a rotation operation in which each of the deburring heads rotate, and thus, the deburring operation can be performed through the above combined operations. The first and second deburring heads are revolved in the opposite directions from

one another. The works sequentially pass through the two deburring heads, which rotate the deburring members and also revolve in the opposite directions from one another, and thus, the burrs can be removed. Therefore, when the deburring members alternately pass on the work, the burr of the work is processed in a cross shape, thereby achieving a multidirectional deburring operation. Accordingly, the deburring operation can be performed even on small-sized and/or loophole-shaped holes, and regardless of a direction in which such burr of a small-sized and/or loophole-shaped hole and a burr of a cutout portion protrude, the deburring operation can be performed effectively with high-quality.
Because the first and second deburring heads have the mutually overlapping overlap area in the deburring member revolution areas arising from the revolution of the first and second deburring heads, a small planar area in which the two deburring heads are disposed is sufficient, and thus, the entire device can be downsized. The first and second deburring heads have the overlap area, however, since the deburring head revolution drive mechanism revolves the deburring heads in synchronization in the opposite directions from one another, the spindles and the deburring members attached thereto can successfully avoid interfering with each other. In the case of a synchronized revolution operation in the same direction, if a number of the spindles is small, such interference in the overlap area can be avoided to some degree, however, if the overlap area is enlarged, such interference cannot be avoided. Through the synchronized revolution operation in the opposite directions, the overlap area can be enlarged.
Thus, by revolving the first and second deburring heads in the opposite directions from one another, the effective deburring operation through the multidirectional deburring operations on the small-sized and/or loophole-shaped holes and on the cutout portion can be achieved, and at the same time, the device can be downsized by avoiding the interference in the overlap area. [0008] In the present invention, each of the first and second deburring heads includes the two spindles, and the two spindles

are preferably disposed in alignment.
In the case where the two spindles are disposed in alignment, the overlap area of the first and second deburring heads can be maximized, thereby further downsizing the device. [0009] In the case where each of the deburring heads includes the two spindles, when an axial direction of the spindles of either one of the deburring heads faces in a front-back direction of the work transportation direction and is disposed in the overlap area, the deburring head revolution drive mechanism preferably disposes the spindles of the other one of the deburring heads such that an axial direction of the spindles faces in a right-left direction and is disposed outside the overlap area. Thus, while avoiding the interference of the first and second deburring heads, the overlap area can be further enlarged.
[0010] In the present invention, the spindle rotation drive mechanisms may rotate the spindles of the first deburring head and the spindles of the second deburring head at different rotation speeds.
As the rotation speed of the spindles, that is, the rotation speed of the deburring members, is increased, the burrs can be easily removed, thereby achieving an effective deburring operation, however, a surface of the work may be damaged depending on the material or the like of the work. When the rotation speed of the deburring member is reduced, the damage problem does not occur, and only the burrs can be removed, however, the operations take a long time. The relation between the rotation speed and the deburring efficiency is not a proportional relation, i.e., as the rotation speed is reduced, a rate of the decrease in the deburring efficiency is increased. On the other hand, by rotating the deburring members of each of the first and second deburring heads, which sequentially pass the works, at the different rotation speeds, the damage problem can be reduced while performing the effective deburring operation.
Thus, in the configuration in which the works pass through the first and second deburring heads, by revolving the first and

second deburring heads in the opposite directions, by rotating the deburring members at different speeds, and by providing the overlap area, the effective deburring operation with high-quality can be achieved with the compact configuration.
[0011] According to an embodiment of the present invention, the deburring device includes a conveyor, a first deburring head, and a second deburring head. The conveyor transports works. The first and second deburring heads are disposed above the conveyor and aligned in a transportation direction. Each of the deburring heads includes a plurality of horizontal spindles that laterally extend from a vertical revolution center such that the spindles can revolve about the revolution center, and includes deburring members each provided to the corresponding spindle. The deburring device further includes spindle rotation drive mechanisms arranged to rotate the spindles of each of the deburring heads and a deburring head revolution drive mechanism arranged to revolve the first and second deburring heads in synchronization in opposite directions from one another such that the first and second deburring heads do not interfere with each other in an overlap area in which the first and second deburring heads overlap in deburring member revolution areas arising from the revolution of the first and second deburring heads. Thus, the effective deburring operation can be performed with the compact configuration. Each of the first and second deburring heads includes two spindles, and by disposing the two spindles in alignment, the device can be further downsized.
Thus, in the case where the two spindles are provided, when an axial direction of the spindles of either one of the deburring heads faces in the front-back direction of the work transportation direction and is disposed in the overlap area, and when an axial direction of the spindles of the other one of the deburring heads faces in the right-left direction and is disposed outside the overlap area, the overlap area can be further enlarged, thus downsizing the device.
When the spindle rotation drive mechanisms rotate the spindles of the first deburring head and the spindles of the second

deburring head at different rotation speeds, the works are not damaged, and the effective deburring operation can be performed.
BRIEF DESCRIPTION OF THE DRAWINGS [0012] Fig. 1 is a partial plan view of a deburring device according to an embodiment of the present invention. [0013] Fig. 2 is a side view of the deburring device. [0014] Fig. 3 is a front view of the deburring device. [0015] Fig. 4 is an enlarged side view illustrating the relation between deburring heads and a head revolution drive mechanism of the deburring device.
[0016] Fig. 5 is a plan view of a gear train of the deburring head revolution drive mechanism.
[0017] Fig. 6 is a schematic perspective view of the deburring head of the deburring device.
[0018] Fig. 7 is a schematic perspective view of a deburring member.
[0019] Fig. 8 illustrates an operation of the deburring device.
[0020] Fig. 9 illustrates other operations of the deburring device.
[0021] Fig. 10 is a plan view of the alignment of the deburring heads of the deburring device according to another embodiment of the present invention.
[0022] Reference numeral 1 Conveyor Reference numeral 2 Work adsorbing device Reference numeral 3 Head-equipped table Reference numeral 11 First deburring head Reference numeral 12 Second deburring head Reference numeral 13 Main body frame
Reference numeral 14 Head lateral movement mechanism Reference numeral 15 Head elevation mechanism Reference numeral 16 Laterally moving body Reference numeral 20 Elevation drive source Reference numeral 21 Spindle

Reference numeral 22 Deburring member
Reference numeral 22b Brush
Reference numeral 23 Rotary burr removing body
Reference numeral 25 Central rotation member
Reference numeral 2 6 Deburring head revolution drive mechanism
Reference numerals 27, 28 Spindle rotation drive mechanisms
Reference numeral 30 Revolution drive motor
Reference numeral 31 Synchronization transfer mechanism
Reference numeral 36 Spindle drive motor
Reference numeral 38 Bifurcation transfer mechanism
Reference symbols A, B Revolution directions
Reference symbols 01, 02 Revolution centers
Reference symbols Rl, R2 Deburring member revolution areas
Reference symbol R12 Overlap area
Reference symbol W Work
Reference symbol X Transportation direction
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS [0023] An embodiment of the present invention will be described with reference to Figs. 1 and 9. A deburring device includes a conveyor 1 arranged to transport works W, and first and second deburring heads 11, 12 that are disposed above the conveyor 1 and aligned in a transportation direction (direction of arrow X) . The work W is a tabular plate such as sheet metal or the like. Punching processing that punches a hole h and cutting processing of outer peripheral or the like has been performed on the work W by a punch press or other sheet-metal processing machines. In the case of large-sized works W, the works W are aligned and placed in tandem on the conveyor 1, and in the case of small-sized works W, a plurality of works W are aligned and placed also in a width direction on the conveyor 1.
[0024] The conveyor 1 is composed of a conveyor belt, and an endless conveyor belt la is bridged by and between a front end roller 3 and a rear end roller 3 of a conveyor frame 2. One of the rollers 3 is driven by a drive source 4 such as a motor or the like. The

conveyor 1 includes a work adsorbing device 5 that adsorbs the work W onto a transportation surface. The work adsorbing device 5 includes countless air holes 6 dispersed on the entire conveyor belt la, a negative pressure chamber 7 that is arranged at a lower surface of a travel path of a transportation side of the conveyor belt la as illustrated in Fig. 2 and that is open at the lower surface of the conveyor belt la, and a suction device 8 such as a suction blower or the like that sucks the inside of the negative pressure chamber 7.
[0025] As illustrated in Figs. 2 and 3, both the first deburring head 11 and the second deburring head 12 are provided to a single head-equipped table 9 and can move with the head-equipped table 9 with respect to a positionally-fixed main body frame 13 via a head lateral movement mechanism 14 and a head elevation mechanism
15 in a lateral direction (a conveyor width direction) Y and in
a vertical direction Z. The conveyor frame 2 of the conveyor 1 is
provided to the main body frame 13. As described later, the
deburring heads 11 and 12 laterally move in order to improve a
deburring effect by a combined operation of revolution and rotation
and to increase a processable range in the lateral direction
(conveyor width direction) Y of the deburring heads 11, 12. The
vertical movement of the deburring heads 11, 12 is performed as a receding operation in which the deburring heads 11, 12 are moved away from an upper surface of the conveyor 1 during non-processing time to avoid (prevent) abrasion.
[0026] As illustrated in Fig. 3, in the head lateral movement mechanism 14, an upper frame member 13a laterally extending above the conveyor 1 includes a laterally moving body 16 such that the laterally moving body 16 can laterally move. Further, the head lateral movement mechanism 14 includes a lateral movement drive source 17 that periodically reciprocates the laterally moving body
16 within a prescribed range. The upper frame member 13a is a
portion of the main body frame 13. The laterally moving body 16
includes travel wheels 18. The lateral movement drive source 17
includes a motor or the like and transfers its rotation to the

laterally moving body 16 via a rotation movement/linear movement converting mechanism such as a crank mechanism or the like. The range in which the deburring heads 11, 12 are moved by the head lateral movement mechanism 14 is set, for example, such that a moving end corresponds to an edge of the transportation surface of the conveyor 1.
[0027] The head elevation mechanism 15 includes an elevation guide 19 and an elevation drive source 20. The elevation guide 19 is provided to the laterally moving body 16 and vertically guides the head-equipped table 9. The elevation guide 19 includes a plurality of guide rods. The elevation drive source 20 uses an electric motor or the like.
[0028] In Fig. 1, the first and second deburring heads 11, 12 can revolve about vertical revolution centers 01, 02, respectively. Each of the first and second deburring heads 11, 12 includes a plurality of horizontal spindles 21 bilaterally extending around the respective revolution centers 01, 02 and includes roller-shaped deburring members 22 each provided to the corresponding spindle 21. In the example of the drawing, each of the first and second deburring heads 11, 12 includes two spindles 21, and the two spindles 21 are positioned in alignment. A base end of each of the spindles
21 is rotatably supported, via a not-illustrated bearing, by a
central rotation member 25 that rotates about the revolution center
0.
[0029] As illustrated in Figs. 6 and 7, for example, the deburring member 22 is composed of a roller-shaped brush having bristles 22b around a tubular core 22a. The brush bristle 22b is made of a piece of flexible file such as a strip sand cloth or sandpaper, for example. The countless bristles 22b are aligned in a circumferential direction and in an axial direction of the tubular core 22a such that a narrow-side direction of each of the bristles 22b is attached along an axial direction of the tubular core 22a, and thus the roller-shaped brush is formed. The deburring member
22 is fit to an outer circumference of the spindle 21 via the tubular
core 22a and fixed to the spindle 21 at both ends. Thus, a

roller-shaped rotary burr removing body 23 arranged to integrally rotate is formed by the spindle 21 and the deburring member 22. In place of the roller-shaped brush, the deburring member 22 may be a ceramic roller. The deburring member 22 and the spindle 21 are not necessarily required to be provided individually, but an integral rotary burr removing body 23 may be provided. In such a case, a core portion of the rotary burr removing body 23 may correspond to the spindle, and an outer circumferential portion may correspond to the deburring member.
[0030] In Fig. 1, the first and second deburring heads 11, 12 are revolved by a deburring head revolution drive mechanism 26 in synchronization with each other, and the spindles 21 of each of the deburring heads 11, 12 are rotated by respective spindle rotation drive mechanisms 27, 28.
[0031] The first and second deburring heads 11, 12 are arranged such that an overlap area R12 (a shaded area of Fig. 1) in which they overlap is generated in deburring member revolution areas Rl, R2 arising from the revolution of the first and second deburring heads. The overlap area R12 is a range in which the first and second deburring heads 11, 12 can avoid interfering with each other when the first and second deburring heads 11, 12 are revolved in synchronization in opposite directions from one another.
[0032] The deburring head revolution drive mechanism 26 is a mechanism that revolves the first and second deburring heads 11, 12 in synchronization in the opposite directions from one another such that the first and second deburring heads 11, 12 do not interfere with each other. As illustrated in Figs . 8A and 8B showing each operation state, when an axial direction of the spindles 21 of either one of the deburring heads 11, 12 faces in a front-back direction of the work transportation direction X and is disposed in the overlap area R12, the deburring head revolution drive mechanism 26 disposes the spindles 21 of the other one of the first and second deburring heads 11,12 such that an axial direction of the spindles 21 faces in a right-left direction and is disposed outside the overlap area R12.

[0033] A specific configuration example of the deburring head revolution drive mechanism 26 will be described with reference to Figs. 4 and 5. As illustrated in Fig . 4, each of the central rotation members 25 of the first and second deburring heads 11, 12 is supported such that the central rotation members 25 can rotate about the respective revolution centers 01, 02 via respective rotation supporting members 29 below a lower surface of the head-equipped table 9. The deburring head revolution drive mechanism 26 includes a revolution drive motor 30 and a synchronization transfer mechanism 31. The synchronization transfer mechanism 31 bifurcates the rotation of the revolution drive motor 30 into two series and transfers the rotation to the central rotation members 25 of the deburring heads 11, 12 in synchronization. The synchronization transfer mechanism 31 is composed of a gear train including: driven gears 32 provided to the respective central rotation members 25 of the deburring heads 11, 12 concentrically with the respective revolution centers 01, 02; two middle gears 33 arranged between the two driven gears 32 to be engaged with the respective driven gears 32; and a drive gear 34 that is engaged with one of the middle gears 33. The drive gear 34 is connected with an output shaft 30a of the revolution drive motor 30 directly or via a not-illustrated reducer device. The two middle gears 33 are supported and engaged with each other such that the middle gears 33 can rotate via spindles 35 below the lower surface of the head-equipped table 9. Thus, since the driven gears 32 of the deburring heads 11, 12 are engaged with each other via the two middle gears 33, the deburring heads 11, 12 are revolved in synchronization in the respective revolution directions A, B, which are opposite from one another. [0034] In place of the configuration using the above synchronization transfer mechanism 31, the deburring head revolution drive mechanism 2 6 may provide each of the deburring heads 11, 12 with an individual motor and control the rotation of the motors to electrically synchronize with each other. [0035] In Fig. 4, the spindle rotation drive mechanisms 27, 28 for each of the deburring heads 11, 12 include: a spindle drive

motor 36 mounted on the head-equipped table 9; drive shafts 37 that can rotate about the respective revolution centers 01, 02 of the central rotation members 25 by being connected to an output shaft of the spindle drive motor 36; and bifurcation transfer mechanisms 38 that bifurcate the rotation of the drive shafts 37 into each of the spindles 21 to transfer the rotation. The drive shaft 37 is rotatably supported in the hollow central rotation member 25 via a not-illustrated bearing. Although an inner configuration is not illustrated, the bifurcation transfer mechanism 38 includes, for example, a driving side bevel gear provided to the drive shaft 37 and a driven side bevel gear provided to each of the spindles 21 to be engaged with the driving side bevel gear, or the like.
The spindle rotation drive mechanism 27 of the first deburring head 11 and the spindle rotation drive mechanism 28 of the second deburring head 12 drive the spindles 21 at rotation speeds that are different from one another. In such a case, any one of the deburring heads 11, 12 may drive the corresponding spindles 21 at a higher rotation speed. Alternatively, the deburring heads 11, 12 are not necessarily required to drive the spindles 21 at the different rotation speeds, but may drive them at the same rotation speed.
[0036] An operation of the above configuration will be described. The work W, which is a sheet-metal processed plate, is adsorbed by negative pressure and transported on the conveyor 1. While being transported on the conveyor 1, each of the works W passes below the first and second deburring heads 11, 12, and a deburring operation is sequentially performed by the deburring heads 11, 12.
At this time, each of the deburring heads 11, 12 performs a revolution operation in which the laterally arranged deburring members 22 revolve and a rotation operation in which each of the deburring members 22 rotate, and thus removes burrs through the above combined operations. As represented by the revolution directions A and B, the first and second deburring heads 11, 12 revolve in the opposite directions from one another. The works W sequentially pass below the two deburring heads 11, 12 revolving
13

in the opposite directions from one another, and thus the deburring operation is performed. Accordingly, a multidirectional deburring operation is performed on a burr (not-illustrated) generated at an opening edge of the hole h or a cut portion of the work W, or the like. Therefore, a high-quality deburring operation can be effectively performed regardless of a direction in which the burr protrudes.
[0037] In the case where the deburring members 22 of the deburring heads 11, 12 are made of brushes as described above, each of the brush bristles 22b made of a sand cloth or the like flaps the burr protruding on a surface of the work W, thereby producing a deburring effect. Therefore, through the combination of the revolution operation in the opposite directions and the rotation operation, the deburring operation can be more effectively performed with high-quality.
[0038] In the present embodiment, while the works W are transported on the conveyor 1, the first and second deburring heads 11, 12 are laterally reciprocated by the head lateral movement mechanism 14 at intervals. Therefore, in addition to the above revolution operation in the opposite directions and the rotation operation, the operation of the deburring member 22 is combined with the lateral movement, thus achieving a more effective, high-quality deburring operation.
In addition to the above combined operations, the lateral movement of the deburring heads 11, 12 allows the deburring operation across the full width of the conveyor 1 with the small-sized deburring heads 11, 12 with respect to the width of the conveyor 1 by moving the deburring member revolution areas Rl, R2 periodically and laterally as illustrated in Fig. 9. Therefore, the deburring heads 11, 12 can be downsized and reduced in weight, thus downsizing the entire deburring device.
[0039] The first and second deburring heads 11, 12 generate the overlap area R12 in which they overlap in the deburring member revolution areas Rl, R2 arising from the revolution of the first and second deburring heads 11, 12. Accordingly, a total planar area

in which the two deburring heads 11, 12 are disposed can be reduced, thereby downsizing the entire device. Although the first and second deburring heads 11, 12 generate the overlap area R12, since the deburring head revolution drive mechanism 26 revolves the deburring heads 11, 12 in synchronization in the opposite directions from one another, the spindles 21 and the deburring members 22 attached thereto can avoid interfering with each other. Even in the case of synchronized revolution in the same direction, if the number of spindles 21 is small, the interference in the overlap area R12 can be avoided to some degree, however, such interference cannot be avoided if the overlap area R12 is enlarged. Through the synchronized revolution in the opposite directions, the overlap area R12 can be enlarged.
Thus, by revolving the first and second deburring heads 11, 12 in the opposite directions from one another, the effective deburring operation through the multidirectional deburring operation can be achieved while downsizing the device by avoiding the interference in the overlap area R12.
[0040] As described in the above embodiment, when each of the deburring heads 11, 12 has two spindles 21 and is disposed in alignment, by maximizing the overlap area R12 of the first and second deburring heads 11, 12, the device can be further downsized.
In such a case, when the axial direction of the spindles 21 of any one of the deburring heads 11, 12 faces in the front-back direction of the work transportation direction X and is disposed in the overlap area R12, the deburring head revolution drive mechanism 26 disposes the spindles 21 of the other one of the first and second deburring heads 11, 12 such that the axial direction of the spindles 21 faces in the right-left direction and is disposed outside the overlap area R12. In other words, the first and second deburring heads 11, 12 have rotation phases that are different by 90 degrees. Therefore, while avoiding the interference of the first and second deburring heads 11, 12, the overlap area R12 can be further enlarged. [0041] The spindle rotation drive mechanisms 27, 28 drive the

first and second deburring heads 11, 12 such that the spindles 21 are rotated at speeds that are different from one another. Therefore, the effective deburring operation can be achieved. In other words, as the rotation speed of the spindle 21, that is, the rotation speed of the deburring member 22, is increased, burrs can be easily removed, thereby performing the effective deburring operation, however, the surface of the work W may be damaged depending on the material of the work W. By reducing the rotation speed of the deburring member 22, the burrs can be removed without damaging the works W, however, the operation takes longer time. The relation between the rotation speed and the deburring efficiency is not a proportional relation, i.e., as the rotation speed is reduced, a rate of the decrease in the deburring efficiency is increased. On the other hand, by driving the first and second deburring heads 11, 12, sequentially passing the works W such that the deburring members 22 of the first deburring head 11 and the deburring members 22 of the second deburring head 12 are rotated at the speeds that are different from one another, the damage of the works W can be reduced while performing the effective deburring operation.
The deburring device of the present embodiment can achieve the deburring operation with high quality and high efficiency with a compact configuration by arranging the first and second deburring heads 11, 12 to revolve in the opposite directions from one another, by arranging the deburring members rotate at the speeds that are different from one another, and by providing the overlap area R12 in the configuration in which the works W are sequentially passed through the first and second deburring heads 11, 12. [0042] In the above embodiment, each of the deburring heads 11, 12 is provided with the two spindles 21, but may be provided with more than or equal to three spindles 21. As the number of spindles 21 increases, it becomes difficult to enlarge the overlap area R12 without causing the interference, however, as illustrated in Fig. 10, for example, even when three spindles 21 are provided, the overlap area can be obtained without causing the interference.

WHAT IS CLAIMED IS:
1. A deburring device comprising:
a conveyor arranged to transport a work;
a first deburring head and a second deburring head that are
disposed above the conveyor and aligned in a transportation
direction, each of the first and second deburring heads including:
a plurality of horizontal spindles laterally extending
from a vertical revolution center such that the spindles can
revolve about the vertical revolution center; and
deburring members each provided to the corresponding
spindle;
spindle rotation drive mechanisms arranged to rotate the spindles of each of the deburring heads; and
a deburring head revolution drive mechanism arranged to revolve the first and second deburring heads in synchronization in opposite directions from one another such that the first and second deburring heads do not interfere with each other in an overlap area in which the first and second deburring heads overlap in deburring member revolution areas arising from the revolution of the first and second deburring heads.
2. The deburring device according to claim 1, wherein each of the first deburring head and the second deburring head includes the two spindles, and the two spindles are disposed in alignment.
3. The deburring device according to claim 2, wherein when an axial direction of the spindles of either one of the deburring heads faces in a front-back direction of the work transportation direction and is disposed in the overlap area, the deburring head revolution drive mechanism disposes the spindles of the other one of the deburring heads such that an axial direction of the spindles faces in a right-left direction and is disposed outside the overlap area.
4. The deburring device according to any one of claim 1

through claim 3, wherein the spindle rotation drive mechanisms rotate the spindles of the first deburring head and the spindles of the second deburring head at rotation speeds that are different from one another.