JP5973379B2 - Work holding device - Google Patents

Description

  The present invention relates to a workpiece holding device, and more particularly to a workpiece holding device capable of holding a workpiece at a predetermined angle with respect to a processing tool.

Conventionally, in a cutting device that cuts a workpiece based on predetermined data by numerical control using a microcomputer or the like, a carriage on which a processing tool is attached and a workpiece holding device that holds the workpiece operate. The workpiece is brought into contact with the machining tool at a predetermined angle, and the workpiece is cut by the machining tool to cut the workpiece into a desired shape.

Hereinafter, a cutting apparatus provided with a work holding device according to the prior art will be described with reference to FIGS.

  FIG. 1 is a schematic configuration perspective view of a cutting apparatus provided with a workpiece holding device according to the prior art, and FIG. 2 is a schematic configuration showing a main part of the workpiece holding device according to the prior art. An illustration is shown.

The cutting apparatus 100 includes a fixed base member 102, side members 104L and 104R disposed at right and left ends of the base member 102 and orthogonal to the base member 102, and two left and right side members 104L and 104R. The rear member 106 to be connected, the guide rail 108 whose both ends are supported by the side members 104L and 104R and extended in the X-axis direction in the XYZ orthogonal coordinate system, and the both ends are the side members 104L and 104R, respectively. A shaft 110 that is supported and extended in the X-axis direction so as to be parallel to the guide rail 108, and is slidably mounted on each of the guide rail 108 and the shaft 110 and supported so as to be movable in the X-axis direction. Carriage 112, main shaft 114 arranged to be movable in the Z-axis direction on carriage 112, and workpiece Holds, is configured to have a work holding device 120 to be freely arranged movable in the Y-axis direction on the base member 102.

  The work holding device 120 holds a table 122 slidably provided on a pair of guide rails 116 provided on the base member 102, and a disk-shaped work 200, and is disposed on the table 122. And a rotating member 124.

The rotating member 124 includes a substantially circular frame 128 in a frame of a substantially rectangular frame 126, and holds the disc-shaped workpiece 200 in the frame 128.

  The frame 126 is rotated around the X axis by the motor 134, and the frame 128 is rotated around the Y axis by the motor 130.

  Further, in such a rotating member 124, the rod-like members 126-1 and 126-2 extend in parallel with the X axis so that the central axes thereof coincide with each other from the substantially central portions of the right member 126a and the left member 126b of the frame 126. It is installed.

  The rod-shaped member 126-1 is connected to the motor 134, and the rod-shaped member 126-2 is rotatably connected to a fixed member 136 that is fixedly disposed on the table 122.

  Accordingly, the frame body 126 is configured to rotate around the X axis about the central axis O1 of the rod-like members 126-1 and 126-2 by driving the motor 134.

  The motor 134 is provided with a rotating shaft (not shown) that rotates by driving the motor 134, and a gear (not shown) is provided on the rotating shaft.

  Then, by engaging a gear (not shown) provided on the rod-shaped member 126-1 with this gear, the rotation of the motor 134 is transmitted to the rod-shaped member 126-1.

At this time, the backlash of the gear (not shown) provided on the rotating shaft and the gear (not shown) provided on the rod-like member 126-1 are adjusted.

  Further, rod-like members 128-1 and 128-2 are extended in parallel with the Y axis so that the central axes coincide with each other from the substantially central portions of the rear end portion and the front end portion of the frame body 128.

  The rod-like member 128-1 passes through the rear member 126c of the frame body 126 and is connected to the motor 130, and the rod-like member 128-2 passes through the front member 126d of the frame body 126 and is rotatably connected to the front member 126d. Yes.

  Accordingly, the frame 128 is configured to rotate around the Y axis around the central axis O2 of the rod-shaped members 128-1 and 128-2 by driving the motor 130.

  The motor 130 is provided with a rotating shaft (not shown) that rotates by driving the motor 130, and a gear (not shown) is provided on the rotating shaft.

  The gear 130 (not shown) provided on the rod-shaped member 128-1 is engaged with this gear, thereby transmitting the rotation of the motor 130 to the rod-shaped member 128-1.

At this time, the backlash of the gear (not shown) provided on the rotating shaft and the gear (not shown) provided on the rod-like member 126-1 are adjusted.

  For this reason, in the cutting device 100 provided with the workpiece holding device 120, cutting can be performed while adjusting the contact angle of the processing tool 132 with respect to the workpiece 200 within a predetermined range, and cutting of a complicated shape is possible.

The cutting device 100 includes a motor (not shown) that moves the carriage 112 in the X-axis direction, a motor (not shown) that moves the workpiece holding device 120 in the Y-axis direction, and the main shaft 114 in the Z-axis direction. The entire operation including the driving of the moving motor (not shown), the motor 130 and the motor 134 is controlled by a microcomputer (not shown).

  In the above configuration, when the cutting device 100 performs the cutting process on the workpiece 200, the operator attaches the processing tool 132 to the spindle 114 and holds the workpiece 200 on the frame 128 of the workpiece holding device 120. Then, cutting data is input to a microcomputer (not shown).

  Thereafter, in the cutting apparatus 100, when an operator instructs the start of the cutting process by an operation using an operator (not shown), the cutting apparatus 100 moves the table 122 in the Y-axis direction based on the input cutting data. At the same time, the carriage 112 is moved in the X-axis direction, and the main shaft 114 is moved in the Z-axis direction (see FIG. 2).

  As a result, the relative positional relationship between the workpiece 200 held by the frame 128 of the rotating member 124 and the machining tool 132 attached to the main shaft 114 changes three-dimensionally.

  Further, in the cutting apparatus 100, the frame body 126 is rotated around the X axis by the motor 134 based on the input cutting data, and the frame body 128 is rotated around the Y axis by the motor 130 (see FIG. 2). refer.).

Thereby, in the cutting device 100, the machining tool 132 attached to the main shaft 114 can be brought into contact with the workpiece 200 held by the frame body 128 at a predetermined angle, so that a complicated shape can be cut. .

However, in such a workpiece holding device 120, since the frame body 128 is rotatably disposed in the frame body 126 to which the frame body 128 that holds the workpiece 200 is directly connected, the cutting that occurs when the workpiece 200 is cut. It has been pointed out as a problem that waste enters between the frame body 126 and the rod-shaped members 128-1 and 128-2 and the frame body 128 does not rotate smoothly.

  Further, in the rotating member 124, a gear (not shown) of a rotating shaft (not shown) provided on the motor 134 and a gear (not shown) provided on the rod-like member 126-1. Engages with a gear (not shown) of a rotating shaft (not shown) provided on the motor 130 and a gear (not shown) provided on the rod-like member 128-1. I did it.

  For this reason, the backlash must be adjusted between the gears to be engaged.

  Such adjustment of the backlash between the gears is not an easy operation, and it has been pointed out as a problem that it takes time and labor to produce the work holding device 120.

EP 2247405 Specification

  The present invention has been made in view of the various problems of the conventional techniques as described above, and an object of the present invention is to provide a work holding device that is less likely to cause problems in rotation of a rotating member due to cutting waste. It is something to try.

  Another object of the present invention is to provide a workpiece holding device that can be easily manufactured with a simple configuration.

In order to achieve the above object, the present invention is disposed in a cutting apparatus in which the positional relationship between a work tool attached to a main shaft moving in the Z-axis direction in an XYZ orthogonal coordinate system and a workpiece changes relatively in three dimensions. In the workpiece holding device, a base member provided with a first rotating shaft provided around the X axis by the first driving device and the first rotating shaft is provided. A distal end portion of the first rotation shaft is disposed in the vicinity of one end portion, a substantially L-shaped rotation member that rotates around the X axis by rotation of the first rotation shaft, and a second drive means are provided, A second rotating shaft that rotates around the Y axis by the second driving means is provided, and holds the workpiece, a driving member fixedly disposed at the other end of the rotating member, Workpiece fixedly disposed at the tip of the second rotating shaft A workpiece holding device having a support member, the center of the workpiece holding member, while positioned on the center axis of said first rotary shaft so as to be located on the central axis of said second rotary shaft It is a thing.

  Further, according to the present invention, in the above-described invention, the rotating member is formed with a bent portion in the vicinity of the other end portion, and the length in the Z-axis direction becomes longer from the bent portion toward the one end portion. At the same time, the one end is substantially arc-shaped.

  In the present invention described above, the base member is fixedly disposed on the cutting device.

  According to the present invention, in the above-described invention, a substantially U-shaped member is provided at a tip portion of the second rotating shaft, and the work holding member is fixedly disposed on the member. Is.

  In the present invention described above, the base member is arranged to be movable in the Y-axis direction in the cutting device.

  In the present invention described above, the first driving means rotates the first rotating shaft via a first belt, and the second driving means passes through a second belt. Thus, the second rotating shaft is rotated.

  In the present invention, the workpiece is a dental ceramic, and the dental ceramic held on the workpiece holding member is cut by the machining tool.

  Since the present invention is configured as described above, the present invention has an excellent effect that it is difficult for rotation defects to occur due to cutting waste.

  Moreover, since the present invention is configured as described above, it has an excellent effect that it can be easily created with a simple configuration.

FIG. 1 is a schematic configuration perspective view of a cutting apparatus provided with a work holding device according to the prior art. FIG. 2 is a schematic configuration explanatory view showing a main part of a conventional work holding device. FIG. 3 is a schematic configuration perspective view of the cutting apparatus provided with the workpiece holding device according to the first embodiment of the present invention. 4 is a view taken along arrow IX in FIG. Fig.5 (a) is a plane explanatory view of the workpiece holding apparatus shown in FIG. 3, and FIG.5 (b) is a V arrow view of Fig.4 (a). 6A is a view taken in the direction of arrow VI in FIG. 5A, and FIG. 6B is a view taken in the direction of arrow VII in FIG. FIG. 7 is a view taken along arrow VIII in FIG. FIG. 8 is an explanatory perspective view of a schematic configuration of a cutting device provided with a workpiece holding device according to a second embodiment of the present invention. 9A is an explanatory plan view of the work holding device shown in FIG. 8, and FIG. 9B is a view taken in the direction of arrow I in FIG. 9A. FIG. 10A is a view taken in the direction of arrow II in FIG. 9A, and FIG. 10B is a view taken in the direction of arrow III in FIG. FIG. 11 is a view taken along arrow IV in FIG.

  Hereinafter, an example of an embodiment of a work holding device according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, the same or equivalent components as those of the conventional work holding device described with reference to FIGS. 1 and 2 are indicated by the same reference numerals as those used above. The detailed configuration and description of the function and effect will be omitted as appropriate.

  First, a first embodiment of a workpiece holding device according to the present invention will be described with reference to FIGS.

Here, FIG. 3 shows a schematic configuration perspective view of the cutting device provided with the workpiece holding device according to the first embodiment of the present invention, and FIG. 4 shows an IX arrow of FIG. FIG. 5 (a) shows a plan view of the work holding device according to the first embodiment of the present invention, and FIG. 5 (b) shows a plan view. 5 (a) is shown, and FIG. 6 (a) shows the VI arrow view of FIG. 5 (a), and FIG. 6 (b). FIG. 5A shows a view taken along the arrow VII of FIG. 5A, and FIG. 7 shows a view taken along the arrow VIII of FIG. 5A.

3 and 4 includes a moving mechanism for moving the carriage 112 in the Y-axis direction, and holds a workpiece fixedly disposed on the base member 102 in place of the workpiece holding device 120. The point which is provided with the apparatus 50 differs from the cutting apparatus by a prior art.

More specifically, in this cutting apparatus 300, a pair of guide rails 302 extending in the Y-axis direction on the right side surface 104La of the side member 104L, and a moving member slidably disposed on the guide rail 302 304, a pair of guide rails 306 extending in the Y-axis direction on the left side surface 104Ra of the side member 104R, a moving member 308 slidably disposed on the guide rail 306, and both ends of the moving member 304 308 and supported by the guide rail 310 extending in the X-axis direction, and both ends of the guide rail 310 supported by the moving members 304 and 308 and extending in the X-axis direction. The shaft 312 constitutes a moving mechanism that moves the carriage 112 in the Y-axis direction.

  The moving members 304 and 308 are moved in the Y axis direction by the guide rails 302 and 306, respectively. At this time, the guide rail 310 and the shaft 312 are movable in the Y axis direction in a state parallel to the X axis. It is configured as follows.

  Specifically, for example, the guide rail 306 is disposed on the left side surface Ra of the side member 104R at a position that coincides with the guide rail 302 disposed on the right side surface 104La of the side member 104L in the Z-axis direction. So that Then, the moving member 304 and the moving member 308 are arranged at positions that coincide with each other in the Z-axis direction.

  In addition, a driving motor (not shown) is attached to each of the moving members 304 and 308.

  Each drive motor (not shown) attached to the moving members 304 and 308 is set so that the amount of movement of the moving member 304 and the amount of movement of the moving member 308 coincide with each other by driving. The

In addition, each drive motor (not shown) attached to the moving members 304 and 308 is driven in synchronization by a microcomputer (not shown).

Further, the work holding device 50 is fixedly disposed on the base member 102, and is rotatably disposed on the base member 54 in the vicinity of one end portion 56a. A substantially L-shaped rotation member 56 bent at a right angle in the portion 56b, a drive member 58 that is fixedly disposed on the other end portion 56c of the rotation member 56, and rotates a work holding member 62 described later; A work holding member 62 that is rotatably disposed on the drive member 58 and detachably holds the work 200 is configured.

  The base member 54 is provided with a motor 88 on the front side, and a pulley 66 is fixedly provided at a right side end portion 64 a of the rotating shaft 64 attached to the motor 88. The rotating shaft 64 extends along the X-axis direction, and the right side end portion 64 a passes through the right side surface 54 a of the base member 54.

  Further, the base member 54 is provided with a rotating shaft 68 extending in parallel with the rotating shaft 64 on the rear side, and a pulley 70 is fixedly provided at a right side end portion 68 a of the rotating shaft 68. A rotation member 56 is fixedly provided at the left end 68b. The rotating shaft 68 is provided through the right side surface 54a and the left side surface 54b of the base member 54.

  An endless belt 72 is stretched between the pulley 66 and the pulley 70, and when the motor 88 is driven to rotate the pulley 66 together with the rotating shaft 64, the pulley 70 rotates via the belt 72. Become. Thereby, the rotating shaft 68 rotates and the rotating member 56 provided at the left side end portion 68b of the rotating shaft 28 is rotated.

  Specifically, when the pulley 88 rotates together with the rotation shaft 64 in the direction of arrow M by driving the motor 88, the pulley 70 rotates in the direction of arrow N, and the rotation of the pulley 70 in the direction of arrow N rotates with the rotation shaft 68. The member 56 rotates in the direction of arrow P.

  Further, when the pulley 88 rotates together with the rotating shaft 64 in the arrow Q direction by driving the motor 88, the pulley 70 rotates in the arrow R direction, and the rotating member 56 together with the rotating shaft 68 generated by the rotation of the pulley 70 in the arrow R direction. It will rotate in the direction of arrow S.

  Further, the base member 54 is fixed to the base member 102 on the lower surface 54a.

  Here, in the present embodiment, the upper limit of the rotation angle of the rotating member 56 from the horizontal position in the arrow P direction and the arrow S direction is 25 °. The drive of the motor 88 is controlled by a microcomputer (not shown) so that the rotation angle of the rotating member 56 from the horizontal position in the arrow P direction and the arrow S direction is 25 ° as an upper limit.

  The horizontal position of the rotation member 56 is a position when the central axis O6 of the rotation shaft 78 of the drive member 58 connected to the other end 56c of the rotation member 56 is in a state parallel to the Y axis. is there.

Further, the driving of the motor 88 is controlled by a microcomputer (not shown), and the rotating member 56 is stopped at an arbitrary angle within a rotatable angle range.

  The rotating member 56 has a substantially L-shape obtained by bending a plate member having a predetermined thickness at the bent portion 56b, and is arranged on the left side end portion 68b of the rotating shaft 68 in the vicinity of one end portion 56a of the substantially L-shape. It is fixed. The bent portion 56b is formed in the vicinity of the other end portion 56c having a substantially L shape.

  Therefore, the rotating member 56 rotates with the rotation of the rotating shaft 68. That is, the rotation member 56 rotates about the X axis about the central axis O5 of the rotation shaft 68.

  Further, the rotation member 56 has a drive member 58 fixed to the other end portion 56c having a substantially L shape.

  Further, the rotation member 56 has a shape in which the length in the Z-axis direction increases as it goes from the bent portion 56b to the one end portion 56a, and the one end portion 56a has a substantially arc shape. .

That is, the rotation member 56 has a substantially fan-shaped portion formed along the Y-axis direction from the bent portion 56 b to the one end portion 56 a, and extends from the bent portion 56 b to the one end portion 56. The area increases as you go.

  The drive member 58 includes a gripper 58-1 and a motor 58-2 that grip the rotary shaft 78 in a rotatable manner.

  In the gripper 58-1, the other end 56c of the rotating member 56 is fixed on the right side surface 58-1a, and the motor 58-2 is fixed on the left side surface 58-1b.

  In addition, the rotating shaft 78 that is gripped rotatably by the gripping portion 58-1 passes through the back surface 58-1c and the front surface 58-1d and extends in the Y-axis direction.

  A pulley 80 is fixedly provided at the rear end 78 a of the rotating shaft 78, and a work holding member 62 is fixedly provided at the front end 78 b of the rotating shaft 78.

  Further, a rotating shaft 82 that rotates by driving of the motor 58-2 is attached to the motor 58-2. The rotating shaft 82 is provided in parallel with the rotating shaft 78.

  A pulley 84 is fixedly provided at the rear end 82 a of the rotating shaft 82.

  An endless belt 86 is stretched between the pulley 80 and the pulley 84, and when the motor 58-2 is driven to rotate the pulley 84 together with the rotating shaft 84, the pulley 80 rotates via the belt 86. It will be. Thereby, the rotating shaft 78 rotates and the workpiece holding member 62 provided at the front end 78b of the rotating shaft 78 is rotated.

  Specifically, when the pulley 84 rotates in the arrow T direction together with the rotating shaft 82 by driving the motor 58-2, the pulley 80 rotates in the arrow U direction, and the pulley 80 rotates in the arrow U direction together with the rotating shaft 78. The work holding member 62 rotates in the arrow V direction.

  Further, when the pulley 58 rotates together with the rotating shaft 82 in the arrow W direction by driving the motor 58-2, the pulley 80 rotates in the arrow X direction, and the workpiece holding member together with the rotating shaft 78 by the rotation of the pulley 80 in the arrow X direction. 62 rotates in the arrow Y direction.

  In the present embodiment, the drive of the motor 58-2 is controlled by a microcomputer (not shown), and the work holding member 62 can be rotated 360 ° in the arrow V direction and the arrow Y direction. ing.

Further, the drive of the motor 58-2 is controlled by a microcomputer (not shown), and the work holding member 62 is stopped at an arbitrary angle within a rotatable angle range.

  In addition, the work holding member 62 is a substantially circular frame, and is configured to hold the circular work 200.

  In addition, since a conventionally well-known technique can be used as a specific structure which hold | maintains the disk shaped workpiece | work 200 in the workpiece | work holding member 62, the detailed description shall be abbreviate | omitted.

  The work holding member 62 is fixed to the front end 78a of the rotating shaft 78 on the rear side. At this time, the length of the rotary shaft 78 is set so that the central portion O of the work holding device 62 is positioned on the central axis O3 of the rotary shaft 68 and on the central axis O6 of the rotary shaft 78. ing.

  Therefore, the work holding member 62 rotates as the rotating shaft 78 rotates. That is, the work holding member 62 rotates around the Y axis around the central axis O6 of the rotation shaft 78.

  Here, in the present embodiment, the rotation member 56 has an upper limit of a rotation angle of 25 ° from the horizontal position in the arrow P direction and the arrow S direction. For this reason, the work holding member 62 connected to the rotating member 56 via the driving member 58 rotates about the central axis O5 of the rotating shaft 68 in a range of ± 25 ° from the horizontal position.

  Note that 0 ° indicates that the workpiece holding device 62 is in the horizontal position, and the angle indicated by “+” of “± 25 °” is an angle when the workpiece holding device 62 is rotated in the arrow Z1 direction. The angle indicated by “−” is the angle when the work holding device 62 is rotated in the direction of the arrow Z2 (see FIG. 5B).

  In the present embodiment, it is assumed that the work holding member 62 rotates 360 ° in the arrow V direction and the arrow Y direction. For this reason, the workpiece holding member 62 rotates within a range of ± 360 ° about the rotation axis O6.

  Note that 0 ° indicates that the work holding device 62 is in the horizontal position, and the angle indicated by “+” of “± 360 °” is an angle when rotated in the direction of the arrow V, and “−”. The angle indicated by is an angle when rotated in the arrow Y direction.

The horizontal position of the work holding device 62 is a position when the work holding device 62 is in a state parallel to the XY plane.

  In the above configuration, when the cutting process is performed in the cutting apparatus 300 provided with the work holding device 50, the operator attaches the processing tool 132 to the main spindle 114, and the work holding member 62 of the work holding apparatus 50 has a disk shape. The workpiece 200 is held and cutting data is input to a microcomputer (not shown).

  Thereafter, in the cutting apparatus 300, when the start of the cutting process is supported by an operation by an operator's operator (not shown), the cutting apparatus 300, based on the input cutting data, the moving member 304, While moving 308 in the Y-axis direction, the carriage 112 is moved in the X-axis direction, and the main shaft 114 is further moved in the Z-axis direction.

  As a result, the relative positional relationship between the workpiece 200 held by the workpiece holding device 62 and the machining tool 132 attached to the main spindle 114 changes three-dimensionally.

  Further, in the cutting apparatus 300, based on the input cutting data, the rotating member 56 is rotated around the X axis by the motor 88, and the work holding member 62 is rotated around the Y axis by the motor 58-2.

  As a result, the work holding member 62 rotates within a range of ± 25 ° from the horizontal position around the central axis O5 of the rotary shaft 68, and within a range of ± 360 ° around the central axis O6 of the rotary shaft 78. Can be rotated with.

For this reason, in the cutting device 300 provided with the workpiece holding device 50, the machining tool 132 attached to the spindle 114 is brought into contact with the workpiece 20 held by the workpiece holding member 62 at an arbitrary angle at an arbitrary location. be able to.

  Next, a second embodiment of the work holding device according to the present invention will be described with reference to FIGS.

Here, FIG. 8 shows a schematic configuration perspective view of a cutting device provided with a workpiece holding device according to a second embodiment of the present invention, and FIG. 9 (a) shows the present invention. FIG. 9B shows a plan view of the workpiece holding device according to the second embodiment, and FIG. 9B shows a view taken in the direction of the arrow I in FIG. 9A. 10 (a) shows an II view of FIG. 9 (a), FIG. 10 (b) shows an III view of FIG. 9 (a), and FIG. 11 is a view taken along arrow IV in FIG.

  The cutting device 90 shown in FIG. 8 includes a workpiece holding device 10 slidably provided on a guide rail 12 provided on the base member 102 in place of the workpiece holding device 120. It differs from the cutting device 100 by the prior art.

Further, the cutting device 90 shown in FIG. 8 does not include a moving mechanism that moves the carriage 112 in the Y-axis direction, and the first embodiment described above is configured such that the work holding device 10 moves in the Y-axis direction. It differs from the cutting device 300 provided with the workpiece holding device 50 according to the form.

More specifically, the workpiece holding device 10 includes a base member 14 that is slidably disposed on a guide rail 12 that extends in the Y-axis direction on the base member 102, and one end portion 16a. A substantially L-shaped rotating member 16 that is rotatably disposed on the base member 14 and is bent at a right angle at a bent portion 16b on the rear side, and fixedly disposed on the other end portion 16c of the rotating member 16. A driving member 18 that rotates a rotating member 20 that will be described later, a substantially U-shaped rotating member 20 that is rotatably disposed on the driving member 18, and is fixedly disposed on the rotating member 20. And a work holding member 22 that detachably holds.

  The base member 14 is provided with a motor 48 on the front side, and a pulley 26 is fixedly provided on a right side end 24 a of the rotary shaft 24 attached to the motor 48. The rotating shaft 24 extends along the X-axis direction, and the right side end 24 a passes through the right side surface 14 a of the base member 14.

  Further, the base member 14 is provided with a rotating shaft 28 extending in parallel with the rotating shaft 24 on the rear side, and a pulley 30 is fixedly provided at a right side end portion 28a of the rotating shaft 28, and The rotating member 16 is fixedly provided at the left end portion 28b. The rotating shaft 28 is provided through the right side surface 14a and the left side surface 14b of the base member 14.

  An endless belt 32 is stretched between the pulley 26 and the pulley 30. When the motor 48 is driven to rotate the pulley 26 together with the rotating shaft 24, the pulley 30 rotates via the belt 32. Become. Thereby, the rotating shaft 28 rotates and the rotating member 16 provided at the left side end portion 28b of the rotating shaft 28 rotates.

  Specifically, when the pulley 48 rotates together with the rotating shaft 24 in the direction of arrow A by driving the motor 48, the pulley 30 rotates in the direction of arrow B and rotates together with the rotating shaft 28 by the rotation of the pulley 30 in the arrow B direction. The member 16 rotates in the direction of arrow C.

  Further, when the pulley 48 rotates together with the rotating shaft 24 in the direction of arrow D by driving the motor 48, the pulley 30 rotates in the direction of arrow E, and the rotating member 16 moves together with the rotating shaft 28 due to the rotation of the pulley 30 in the direction of arrow E. It will rotate in the direction of arrow F.

  Further, an engaging portion 34 that engages with the guide rail 12 is provided on the lower surface 14 c of the base member 14.

  Here, in the present embodiment, the rotation angle of the rotating member 16 from the horizontal position in the arrow C direction and the arrow F direction has an upper limit of 30 °. The driving of the motor 48 is controlled by a microcomputer (not shown) so that the rotation angle of the rotating member 16 from the horizontal position in the arrow C direction and the arrow F direction is 30 ° as an upper limit.

  The horizontal position of the rotating member 16 is a position when the central axis O4 of the rotating shaft 38 of the driving member 18 connected to the other end 16c of the rotating member 16 is in a state parallel to the Y-axis direction. It is.

  Further, the drive of the motor 48 is controlled by the control of a microcomputer (not shown), and the rotating member 16 is stopped at an arbitrary angle within the rotatable angle range.

Further, the base member 14 is provided with a drive unit (not shown), and the drive member is controlled by a microcomputer (not shown), whereby the base member 14 is moved to the guide rail 12. Move up.

  The rotating member 16 has a substantially L-shape obtained by bending a plate member having a predetermined thickness at a bent portion 16b. It is fixed. The bent portion 16b is formed in the vicinity of the other end portion 16c having a substantially L shape.

  Therefore, the rotating member 16 rotates with the rotation of the rotating shaft 28. That is, the rotating member 16 rotates around the X axis about the central axis O3 of the rotating shaft 28.

In addition, the rotation member 16 has a drive member 18 fixed to the other end portion 16c having a substantially L shape.

  The drive member 18 includes a gripping portion 18-1 that grips the rotary shaft 38 in a freely rotatable manner and a motor 18-2.

  The grip 18-1 is fixed to the other end 16a of the rotating member 16 on the right side 18-1a, and the motor 18-2 is fixed to the left side 18-1b.

  Moreover, the rotating shaft 38 gripped rotatably by the gripping portion 18-1 passes through the back surface 18-1c and the front surface 18-1d and extends in the Y-axis direction.

  A pulley 40 is fixedly provided at the rear end 38 a of the rotating shaft 38, and the rotating member 20 is fixedly provided at the front end 38 b of the rotating shaft 38.

  Further, a rotating shaft 42 that rotates by driving of the motor 18-2 is attached to the motor 18-2. The rotating shaft 42 is provided in parallel with the rotating shaft 38.

  A pulley 44 is fixedly provided at the rear end 42 a of the rotating shaft 42.

  An endless belt 46 is stretched between the pulley 40 and the pulley 44. When the motor 18-2 is driven to rotate the pulley 44 together with the rotating shaft 42, the pulley 40 rotates via the belt 46. It will be. Thereby, the rotating shaft 38 rotates and the rotating member 20 provided at the front side end portion 38b of the rotating shaft 38 is rotated.

  Specifically, when the pulley 18 rotates together with the rotation shaft 42 in the direction of arrow G by driving the motor 18-2, the pulley 40 rotates in the direction of arrow H, and the rotation of the pulley 40 in the direction of arrow H together with the rotation shaft 38. The rotating member 20 rotates in the direction of arrow I.

  Further, when the pulley 18 rotates together with the rotating shaft 42 in the arrow J direction by driving the motor 18-2, the pulley 40 rotates in the arrow K direction, and the rotating member 20 together with the rotating shaft 38 is rotated by the rotation of the pulley 40 in the arrow K direction. Will rotate in the direction of arrow L.

  In the present embodiment, the drive of the motor 18-2 is controlled by a microcomputer (not shown), and the rotating member 20 can rotate 360 ° in the directions of the arrows I and L. ing.

Further, the drive of the motor 18-2 is controlled by the control of a microcomputer (not shown), and the rotating member 20 is stopped at an arbitrary angle within the rotatable angle range.

  Further, the rotating member 20 has a right side at a rear end portion of the right member 20-1 extended in the Y-axis direction and a rear end portion of the left member 20-2 extended in parallel with the right member 20-1. The member 20-1 and the left member 20-2 are connected to each other by the rear member 20-3, and form a substantially U shape.

  And the rotation member 20 is being fixed to the front side edge part 38b of the rotating shaft 38 in the center position of the back member 20-3.

  Therefore, the rotating member 20 rotates as the rotating shaft 38 rotates. That is, the rotating member 20 rotates around the Y axis about the central axis O4 of the rotating shaft 38.

  In the rotating member 20, the work holding member 22 is fixed to the right member 20-1 and the left member 20-2. At this time, the center portion O of the workpiece holding member 22 is located on the center axis O3 of the rotation shaft 28 and also on the center axis O4 of the rotation shaft 38.

  Here, in the present embodiment, the rotation member 16 has an upper limit of a rotation angle of 30 ° from the horizontal position in the arrow C direction and the arrow F direction. For this reason, the rotating member 20 connected to the rotating member 16 via the drive member 18 rotates about a central axis O5 of the rotating shaft 28 within a range of ± 30 ° from the horizontal position.

  Note that 0 ° indicates that the rotating member 20 is in the horizontal position, and the angle indicated by “+” of “± 30 °” is an angle when the rotating member 20 is rotated in the arrow Z3 direction. The angle indicated by “−” is an angle when the rotating member 20 is rotated in the arrow Z4 direction (see FIG. 9B).

  In the present embodiment, it is assumed that the rotating member 20 rotates 360 ° in the directions of the arrow I and the arrow L. For this reason, the rotating member 20 rotates within a range of ± 360 ° about the rotation axis O4.

  Note that 0 ° indicates that the rotating member 20 is in the horizontal position, and the angle indicated by “+” of “± 360 °” is an angle when rotated in the direction of the arrow I, and is “−”. The angle shown is the angle when rotated in the direction of arrow L.

The horizontal position of the rotating member 20 is a position when the rotating member 20 is in a state parallel to the XY plane.

  The work holding member 22 is a substantially circular frame and is configured to hold a disk-shaped work 200.

  In addition, since a conventionally well-known technique can be used as a specific structure which hold | maintains the disk-shaped workpiece | work 200 in the workpiece | work holding member 22, the detailed description shall be abbreviate | omitted.

Further, since the work holding member 22 is fixedly disposed on the same plane as the rotating member 20, the work holding member 22 rotates or rotates at the same rotation angle as the rotating member 20.

  In the above configuration, when the cutting process is performed in the cutting apparatus 90 provided with the workpiece holding device 10, the operator attaches the processing tool 132 to the main spindle 114, and the workpiece holding member 22 of the workpiece holding device 10 has a disk shape. The workpiece 200 is held and cutting data is input to a microcomputer (not shown).

  Thereafter, when the cutting device 90 is instructed to start the cutting process by an operation by an operator's operator (not shown), the cutting device 90 is based on the inputted cutting data. Is moved in the Y-axis direction, the carriage 112 is moved in the X-axis direction, and the main shaft 114 is further moved in the Z-axis direction.

  As a result, the relative positional relationship between the workpiece 200 held by the workpiece holding member 22 and the processing tool 132 attached to the main spindle 114 changes in three dimensions.

  Further, in the cutting device 90, the rotating member 16 is rotated around the X axis by the motor 48 based on the input cutting data, and the rotating member 20 is rotated around the Y axis by the motor 18-2.

Thereby, in the cutting device 90 provided with the workpiece holding device 10, the machining tool 132 attached to the main shaft 114 is brought into contact with the workpiece 200 held by the workpiece holding member 22 at an arbitrary angle at an arbitrary position. be able to.

  As described above, the workpiece holding device 50 according to the present invention has the base member of the cutting device 300 in which the machining tool 132 attached to the main shaft 114 can move in the X-axis direction, the Y-axis direction, and the Z-axis direction. It was arranged to be fixed on 102.

  Then, a driving member 58 is connected to the rotating member 56 connected to the rotating shaft 68 that is rotated by driving of the motor 88, and the work holding member 62 is connected to the rotating shaft 78 that is rotated by the motor 58-2 in the driving member 58. Connected. At this time, the center of the work holding member 62 is positioned on the central axis O5 of the rotary shaft 68 and the central axis O6 of the rotary shaft 78.

  Thereby, in the workpiece holding device 50 according to the present invention, since the moving mechanism is not provided, there is a problem regarding the movement due to the cutting waste as in the conventional workpiece holding device 100 provided with the moving mechanism. Absent.

Further, the work holding device 50 according to the present invention is not provided with a structure such as a frame surrounding the work holding member 62 or a table for moving in the Y-axis direction. Can also be reduced in weight.

  Furthermore, in the work holding device 50 according to the present invention, the rotating member 56 has a wide area in the vicinity of one end portion 56a connected to the rotating shaft 68.

For this reason, in the workpiece holding device 50 according to the present invention, it becomes difficult for cutting waste to enter the rotating shaft 68.

  In the work holding device 50 according to the present invention, the rotation shaft 68 transmits the rotation of the motor 88 by the belt 72, and the rotation shaft 78 transmits the rotation of the motor 58-2 by the belt 86.

  As a result, in the work holding device 50 according to the present invention, it is not necessary to perform troublesome backlash adjustment in the configuration for transmitting the rotation of the motor, making it easy to create parts, and making the work holding device 50. Becomes easier.

Therefore, the workpiece holding device 50 according to the present invention can be easily manufactured with a simple configuration as compared with the workpiece holding device 100 according to the prior art.

  In the work holding device 10 according to the present invention, the work holding member 22 is fixedly disposed in the rotating member 20 directly connected to the work holding member 22. The rear member 20-3 of the rotating member 20 is fixed to the rotating shaft 38.

  Thereby, in the workpiece holding device 10 according to the present invention, the frame body 128 is rotatably arranged in the workpiece holding device 100 (the frame body 126 directly connected to the frame body 128 holding the workpiece 200) according to the conventional technique. Compared with the configuration), it becomes difficult for cutting waste to enter the rotating portion.

Therefore, according to the workpiece holding device 10 according to the present invention, it is less likely to cause a problem in the rotation of the rotating member as compared with the workpiece holding device 100 according to the prior art.

  In the workpiece holding device 10 according to the present invention, the rotation shaft 28 transmits the rotation of the motor 48 by the belt 32, and the rotation shaft 38 transmits the rotation of the motor 18-2 by the belt 46.

  Thereby, in the workpiece holding device 10 according to the present invention, in the configuration for transmitting the rotation of the motor, there is no need to perform troublesome backlash adjustment, and the production of the parts is facilitated, and the workpiece holding device 10 is produced. Becomes easier.

Therefore, according to the workpiece holding device 10 of the present invention, it can be easily manufactured with a simple configuration as compared with the workpiece holding device 100 according to the prior art.

  The embodiment described above may be modified as shown in the following (1) to (7).

  (1) In the above-described embodiment, in the work holding device 10 according to the second embodiment, the engaging portion 34 is provided on the lower surface 14 c of the base member 14, and the engaging portion 34 is engaged with the guide rail 12. In addition, the work holding device 10 is moved in the Y-axis direction by the base member 14 being moved on the guide rail 12 by a drive unit (not shown) provided on the base member 14. Of course, the present invention is not limited to this.

  That is, in the work holding device 10, the base member 14 may be fixedly disposed on the table 122, and the work holding device 10 may be moved in the Y-axis direction by the table 122. At this time, it is not necessary to provide the base member 14 with the engaging portion 34 and the drive portion (not shown).

  (2) In the above-described embodiment, in the workpiece holding device 10 according to the second embodiment, the workpiece holding device 10 moves in the Y-axis direction when the base member 14 moves on the guide rail 12. However, the present invention is not limited to this, and the base member 14 can be used as long as the machining tool 132 can move in the X axis, the Y axis, and the Z axis in the cutting device 90. May be fixedly disposed on the base member 102.

  (3) In the above-described embodiment, the workpiece holding member 62 according to the first embodiment and the workpiece holding member 22 according to the second embodiment are substantially circular frames, but the present invention is not limited thereto. Of course, it may be a substantially rectangular frame.

  (4) Although not particularly described in the above-described embodiment, the cutting device 90 on which the workpiece holding device 10 is mounted and the cutting device 300 on which the workpiece holding device 50 is mounted include, for example, a dental ceramic as the workpiece 200. It is good also as a denture processing apparatus which cuts the dental ceramic into a desired shape.

  (5) In the above-described embodiment, in the work holding device 50 according to the first embodiment, the endless belt 72 is disposed between the pulley 66 and the pulley 70, and the pulleys 66, 70 and The belt 72 is barely formed in a space where the cutting process of the cutting device 300 is performed. A cover that covers the periphery of such a configuration is provided so that the space around the pulleys 66 and 70 and the belt 72 and the cutting device 300 A space for performing the cutting process may be separated by a cover.

  In the workpiece holding device 50 according to the first embodiment, an endless belt 86 is disposed between the pulley 80 and the pulley 84, and the pulleys 80 and 84 and the belt 86 are cut by the cutting device 300. However, the cover around the structure is provided so that the space around the pulleys 80 and 84 and the belt 86 and the space where the cutting device 300 performs the cutting process are covered by the cover. It may be separated.

  Furthermore, in the workpiece holding device 10 according to the second embodiment, an endless belt 32 is disposed between the pulley 26 and the pulley 30, and the pulleys 26, 30 and the belt 32 are cut by the cutting device 90. However, the cover around the structure is provided so that the space around the pulleys 26 and 30 and the belt 32 and the space where the cutting device 90 performs the cutting process are covered by the cover. It may be separated.

  Furthermore, in the workpiece holding device 10 according to the second embodiment, an endless belt 46 is disposed between the pulley 40 and the pulley 44, and the pulleys 40, 44 and the belt 46 are cut by the cutting device 90. Although it is formed to be exposed in the space where the processing is performed, a cover which covers the periphery of such a configuration is provided to cover the space around the pulleys 40 and 44 and the belt 46 and the space where the cutting device 90 performs the cutting process. You may make it isolate | separate by.

  Thereby, cutting waste does not enter between the pulley and the belt, and the rotation of the rotary shafts 28 and 38 does not cause a problem.

  (6) In the above-described embodiment, in the work holding device 50 according to the first embodiment, the rotation angle of the rotation member 56 is 25 °, but it is needless to say that the present invention is not limited to this. The rotation angle may be larger than 0 ° and smaller than 25 °, or may be larger than 25 ° and 360 ° or less.

  Moreover, in the workpiece holding device 10 according to the second embodiment, the rotation angle of the rotation member 16 is set to 30 °. However, the rotation angle is not limited to this, and is larger than 0 °. The rotation angle may be smaller than 30 °, or may be larger than 30 ° and 360 ° or less.

  (7) You may make it combine suitably the embodiment shown above and the modification shown in said (1) thru | or (6).

  The present invention is suitable for use when holding a workpiece in a cutting device or the like.

  10, 50, 120 Work holding device, 14, 54 Base member, 16, 56 Rotating member, 18, 58 Driving member, 20 Rotating member, 22, 62 Work holding member, 24, 28, 38, 42, 64, 68, 78, 82 Rotating shaft, 26, 30, 40, 44, 66, 70, 80, 84 Pulley, 32, 46, 72, 86 Belt, 90, 100, 300 Cutting device, 200 Workpiece

Claims (7)

In a workpiece holding device disposed in a cutting device in which the positional relationship between a machining tool attached to a spindle that moves in the Z-axis direction in the XYZ orthogonal coordinate system and the workpiece changes relatively in three dimensions,
A base member provided with first driving means and provided with a first rotating shaft that rotates around the X axis by the first driving means;
A substantially L-shaped rotating member that is disposed in the vicinity of one end of the first rotating shaft and rotates around the X axis by the rotation of the first rotating shaft;
A second driving means is provided, and a second rotating shaft that is rotated around the Y axis by the second driving means is provided, and the driving is fixedly disposed at the other end of the rotating member. Members,
A workpiece holding device that holds the workpiece and has a workpiece holding member fixedly disposed at a tip of the second rotating shaft ,
The workpiece holding device is characterized in that a center of the workpiece holding member is located on a central axis of the first rotating shaft and on a central axis of the second rotating shaft . The work holding apparatus according to claim 1,
The rotating member is formed with a bent portion in the vicinity of the other end portion, and the length in the Z-axis direction becomes longer from the bent portion toward the one end portion. A workpiece holding device characterized by its shape. In the workpiece holding device according to any one of claims 1 and 2,
The workpiece holding device, wherein the base member is fixedly disposed on the cutting device. The work holding apparatus according to claim 1,
A workpiece holding device, wherein a substantially U-shaped member is provided at a tip of the second rotating shaft, and the workpiece holding member is fixedly disposed on the member. In the workpiece holding device according to any one of claims 1 and 4,
The workpiece holding device, wherein the base member is arranged to be movable in the Y-axis direction in the cutting device. In the workpiece holding device according to any one of claims 1, 2, 3, 4, or 5,
The first driving means rotates the first rotating shaft via a first belt,
The work holding device, wherein the second driving means rotates the second rotating shaft via a second belt. In the workpiece holding device according to any one of claims 1, 2, 3, 4, 5 or 6 ,
The workpiece is a dental ceramic,
The dental ceramic held on the workpiece holding member by the machining tool is cut. The workpiece holding device.

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