JP2018094702A - Workpiece support moving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece support moving device which enables a workpiece support to be easily installed at a desired position without needing a special actuator.SOLUTION: A workpiece support moving device 1 of the invention includes: a rail 11 installed at a table 23 of a machine tool; a feed screw shaft 12 disposed along the rail 11; a workpiece support 14 which is guided by the rail 11 and driven by the feed screw shaft 12; and a driving force transmission mechanism 5 which can connect with a spindle of the machine tool and transmit rotation of the spindle to the feed screw shaft 12. The structure utilizes a driving force of the spindle of the machine tool to move the workpiece support 14.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a workpiece support moving device for moving a workpiece support that supports a workpiece.

  2. Description of the Related Art Conventionally, in a machine tool, various work supports are used to support a work to be processed on a work support such as a table. For example, when drilling a workpiece, a plurality of workpiece supports may be installed between the workpiece and the table in order to prevent the tool from interfering with the table. Moreover, in order to align the center axis | shaft of a workpiece | work with the rotating shaft of a table, the some workpiece | work support body which hold | grips a workpiece | work from a side may be used.

  When machining workpieces of various sizes and shapes in a machine tool, it is necessary to perform an operation (setup) for installing the workpiece support at a desired position in accordance with the workpiece. In order to perform this setup, conventionally, an operator manually moves the workpiece support. Patent Document 1 discloses a technique for moving a positioning pin as a work support using a dedicated actuator.

JP 2006-82225 A

  However, manually moving a plurality of workpiece supports one by one is a complicated operation and takes time. In addition, when a dedicated actuator as described in Patent Document 1 is used, the size of the device increases, leading to higher costs.

  An object of the present invention is to provide a work support moving apparatus that can easily move a work support without requiring a dedicated actuator.

  The present invention provides a rail installed on a work support part of a machine tool, a feed drive mechanism arranged along the rail, a work support guided by the rail and driven by the feed drive mechanism, A driving force transmission mechanism that is connectable to a main shaft of a machine tool and capable of transmitting a driving force of the main shaft to the feed driving mechanism.

As the feed drive mechanism of the present invention, for example, a ball screw type drive mechanism, a rack and pinion type or belt type feed drive mechanism can be used.
In the present invention, when the driving force transmission mechanism is connected to the main shaft of the machine tool and the main shaft is rotated in this state, the driving force of the main shaft is transmitted to the feed driving mechanism. By being driven by the feed drive mechanism, the workpiece support is moved while being guided by the rail.
According to such a configuration, the workpiece support can be moved using the driving force of the spindle of the machine tool. For this reason, the setup for installing the work support at a desired position can be performed easily and in a short time compared to manual work.
Moreover, since the workpiece is not originally processed during such a setup, even if the spindle of the machine tool is used, the workpiece machining flow is not hindered. Further, since the existing spindle is used for the machine tool, it is not necessary to prepare a dedicated actuator as in the prior art. For this reason, it is possible to reduce the size and cost of the apparatus.
Furthermore, since the moving distance of the work support can be adjusted according to the rotation speed and the rotation time of the spindle, the work support can be installed more accurately than when manually performed.

In the workpiece support moving device of the present invention, the driving force transmission mechanism includes an input-side transmission unit that can be attached to and detached from the main shaft, and an output-side transmission unit that engages with the feed driving mechanism. It is preferable that the transmission unit and the output-side transmission unit can be engaged with each other.
According to such a configuration, the input-side transmission unit can be engaged with the output-side transmission unit by moving the main shaft while the input-side transmission unit is mounted on the main shaft. Thereby, a connection with a main axis | shaft and a driving force transmission mechanism can be performed easily.

In the workpiece support moving device of the present invention, the input-side transmission portion is supported by the shaft portion that is rotationally driven by the main shaft, the shaft portion is movably supported in the axial direction, and the transmission shaft end of the output side transmission portion It is preferable to have an engaging part that can be engaged with the part, and an urging part that urges the engaging part to the side away from the shaft part.
According to such a configuration, the main shaft and the driving force transmission mechanism can be connected by engaging the engaging portion of the input side transmission portion with the transmission shaft end portion of the output side transmission portion.
Here, just before engaging the engaging portion with the transmission shaft end, the rotational phases of the engaging portion and the transmission shaft end may not match each other. In this case, when the engaging portion is pressed against the transmission shaft end portion, the engaging portion retreats against the urging force of the urging portion, so that it is possible to avoid a strong collision between the engaging portion and the transmission shaft end portion. . Further, if the main shaft is slowly rotated while the engaging portion is pressed against the transmission shaft end portion, the engagement portion and the transmission shaft end portion are engaged by the urging force of the urging portion when the mutual rotation phases of the engaging portion and the transmission shaft end portion coincide. The joint part advances, and the engaging part and the transmission shaft end part engage with each other. Therefore, the engaging portion and the transmission shaft end can be reliably engaged without detecting the rotational phase of the engaging portion.

In the workpiece support moving device of the present invention, the engagement portion has an engagement hole into which the transmission shaft end portion is inserted, and is supported via play of a predetermined rotation angle with respect to the shaft portion. Preferably, a guide portion is formed at the opening edge of the engagement hole so that the inner dimension of the engagement hole gradually decreases in the insertion direction of the transmission shaft end portion.
In such a configuration, if the shift of the rotational phase between the engagement portion and the transmission shaft end portion is within the range of play of the rotation angle of the engagement portion, the transmission to the engagement portion can be performed without rotating the main shaft. The shaft end can be engaged. Specifically, when the engagement portion is pressed against the transmission shaft end portion while the rotational phases of the engagement portion and the transmission shaft end portion are slightly shifted, the transmission shaft end portion is guided to the guide portion of the engagement hole. While pushing the engaging part in the circumferential direction. Then, the engagement portion rotates within the range of play, and the mutual rotation phases of the engagement hole and the transmission shaft end portion coincide with each other. Then, the engaging portion moves forward by the urging force of the urging portion, and the transmission shaft end portion is inserted into the engaging hole. Therefore, the engagement hole and the transmission shaft end can be easily engaged.

  According to the present invention, it is possible to provide a work support moving apparatus that can easily move a work support without requiring a dedicated actuator.

The side view which shows the workpiece support moving apparatus and machine tool of 1st Embodiment of this invention. The top view which shows the workpiece support body movement apparatus and table of the said 1st Embodiment. The fragmentary sectional view which shows the workpiece support moving apparatus of the said 1st Embodiment. The side view which shows the rail and slider of the said 1st Embodiment. The fragmentary sectional view which shows the nut runner of the said 1st Embodiment. The partial cross section figure and bottom view which show the nut runner of the said 1st Embodiment. FIG. 6 is a cross-sectional view taken along arrow S1 in FIG. The top view which shows the workpiece support moving apparatus and table of 2nd Embodiment of this invention.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. The workpiece support moving apparatus 1 according to the present embodiment is installed on a machine tool 2 such as a turning ring drilling machine.
〔Machine Tools〕
A schematic configuration of the machine tool 2 will be described with reference to FIG.
The machine tool 2 includes a spindle 21 on which a tool is mounted, a spindle head 22 that rotatably supports the spindle 21, a table 23 that serves as a work support unit that supports the workpiece 3, and the spindle head 22 with respect to the table 23. It has a support structure 24 and the like for supporting relative movement.

The main shaft 21 extends downward from the main shaft head 22, and the workpiece 3 on the table 23 can be processed by a tool attached to the tip.
The table 23 has, for example, a circular plate shape, and an upper surface 231 thereof is horizontally disposed. The table 23 is supported by a table rotation mechanism 26 installed on the base 25 so as to be rotatable about the rotation axis C. In FIG. 1, a cross section of the table 23 is shown.

  The support structure 24 includes two columns 241 erected on the base 25, a cross rail 242 arranged horizontally along the upper surface 231 of the table 23, and the spindle head 22 can be moved along the cross rail 242. And a lifting mechanism 244 that enables the spindle head 22 to move in the vertical direction.

In the machine tool 2 of the present embodiment, the spindle head 22 can move in the horizontal direction and the vertical direction, and the table 23 can rotate around the rotation axis C, so that the spindle 21 can be arbitrarily placed on the table 23. It can be moved to a position.
Further, the machine tool 2 of the present embodiment has two spindles 21, and has a spindle head 22 and a lifting mechanism 244 corresponding to each spindle 21. The two spindle heads 22 are supported by a common support structure 24, and are arranged in a positional relationship of 180 degrees around the rotation axis C.

As shown in FIG. 2, the machine tool 2 is provided with a plurality (12 in the present embodiment) of workpiece support moving devices 1 and centering devices 4.
The centering device 4 is configured to move a plurality of (six in this embodiment) rails 41 arranged along the radial direction of the table 23, clamps 42 movably installed on the rails 41, and the clamps 42. A clamp drive mechanism 43. The plurality of rails 41 are equally arranged radially about the rotation axis C of the table 23. The clamp drive mechanism 43 is disposed in the central hole 232 of the table 23. The plurality of clamps 42 hold the work 3 together, whereby the work 3 is centered.

  The plurality of workpiece support moving devices 1 are arranged between the adjacent rails 41 of the centering device 4 at an equal interval from each other. All the workpiece support moving devices 1 installed on the table 23 and the rails 41 of the centering device 4 are equally arranged around the rotation axis C of the table 23.

[Work support moving device]
With reference to FIG. 3 and FIG. 4, the structure of the workpiece support body moving apparatus 1 is demonstrated.
The workpiece support moving device 1 includes a base 10, a rail 11, a feed screw shaft 12, an auxiliary rail 13, a workpiece support 14, shaft supports 15, 16 and a driving force transmission mechanism 5.

The rail 11 is arranged along the radial direction of the table 23 on the base 10 installed on the upper surface 231 of the table 23. A scale 101 is installed on the base 10 so that the installation position of the workpiece support 14 can be visually confirmed.
The feed screw shaft 12 constitutes a feed drive mechanism, and is arranged along the rail 11 above the rail 11 with a space between the rail 11 and the rail 11. Ends 121 and 122 on both sides of the feed screw shaft 12 are rotatably supported by shaft supports 15 and 16 erected on the base 10 via bearings 151 and 161. One shaft support 16 is provided with a lever 123 that can fix the rotation of the feed screw shaft 12.
The auxiliary rail 13 is disposed above the feed screw shaft 12 along the feed screw shaft 12 with a space between the auxiliary screw 13 and the feed screw shaft 12. Both end portions of the auxiliary rail 13 are supported by shaft supports 15 and 16.

The work support 14 includes a slider 17, a seating block 18, and a nut 19.
The slider 17 is guided by the rail 11 and is movable, and a rolling ball (not shown) is disposed between the rail 11 and the slider 17.
The seating block 18 has a bottom wall 181 fixed to the slider 17, two side walls 182 and 183, and an upper wall 184 capable of supporting the workpiece 3 on the upper surface. Holes 185 and 186 through which the auxiliary rail 13 is inserted are formed in the two side walls 182 and 183. In addition, a hole 187 through which the feed screw shaft 12 is inserted is formed in one side wall 182, and a nut 19 is fixed to the other side wall 183 so as to pass therethrough.
The nut 19 is screwed to the feed screw shaft 12 with a plurality of balls 191 sandwiched between the nut 19 and the feed screw shaft 12. The feed screw shaft 12 and the nut 19 constitute a so-called ball screw type feed drive mechanism.

The driving force transmission mechanism 5 includes a nut runner 6 as an input side transmission unit that can be attached to and detached from the main shaft 21, and an output side transmission unit 7 that engages with the feed screw shaft 12.
The nut runner 6 can be attached to and detached from the main shaft 21 and can be engaged with the output side transmission unit 7.
The output side transmission unit 7 includes a first gear 71 fixed to one end 121 of the feed screw shaft 12, a second gear 72 engaged with the first gear 71, and a second gear 72. The transmission shaft 73 has a fixed end.
The transmission shaft 73 is disposed along a direction orthogonal to the feed screw shaft 12. The transmission shaft 73 includes a shaft center portion 731 that is rotatably supported by the shaft support 16 via a bearing 162, and a lower shaft that protrudes downward from the shaft support 16 and to which the second gear 72 is fixed. It has an end 732 and a transmission shaft end 733 protruding upward from the shaft support 16. The cross section in the horizontal direction of the transmission shaft end portion 733 has a square shape such as a quadrangle.
The first gear 71 and the second gear 72 are miter gears (bevel gears), respectively, and convert the transmission direction of the rotational force by 90 degrees.

  A plurality (12 in this embodiment) of workpiece support moving devices 1 are installed on the table 23 of the machine tool 2 of the present embodiment. Each of the plurality of workpiece support moving devices 1 has the above-described configuration, but the number of nut runners 6 is equal to the number of main shafts 21. In this embodiment, since the machine tool 2 has the two main shafts 21, the plurality of workpiece support moving devices 1 share the two nut runners 6.

[Nutrunner]
A specific configuration of the nut runner 6 will be described with reference to FIGS.
The nut runner 6 includes a holder 61, a shaft portion 62, a cylindrical portion 63 as an engaging portion, a coil spring 64 as an urging portion, a stop pin 65, and the like.

The holder 61 includes a tapered shank portion 611 that is fitted and held on the main shaft 21 and a grip portion 612 that grips the shaft portion 62.
The shaft part 62 has a large-diameter part 621 in the upper part and a small-diameter part 622 that continues to the lower side of the large-diameter part 621. The upper side of the large diameter portion 621 is held by the holding portion 612 of the holder 61. The small diameter portion 622 is housed in the cylindrical portion 63 at the lower side, and a plurality of round pins 66 are inserted on the side surface thereof. Further, a cutout 624 is formed in the side surface of the small diameter portion 622 along the axial direction.

The tubular portion 63 has a tubular shape as a whole, is supported by the shaft portion 62 via the coil spring 64, and is movable and rotatable in the axial direction with respect to the shaft portion 62. The inner hole of the cylindrical portion 63 is divided into an upper circular hole 631 and a lower engagement hole 632.
The circular hole 631 is a circular hole and accommodates the small diameter portion 622 of the shaft portion 62. The circular hole 631 is divided into an upper small-diameter hole 633 and a lower large-diameter hole 634, and a step 635 is formed on the side surface of the hole serving as a boundary.
The engagement hole 632 is a square hole, and the transmission shaft end portion 733 having the same square shape is inserted therein. A guide portion 636 whose inner diameter dimension gradually decreases toward the insertion direction of the transmission shaft end portion 733 is formed at the opening edge of the engagement hole 632. Further, the guide portion 636 has a circular edge shape on the near side in the insertion direction, and the edge shape on the back side in the insertion direction is the same square shape as the engagement hole 632, and is reduced while continuously deforming according to the insertion direction. Yes.

One end of the coil spring 64 is fixed to a step 623 that is a boundary between the large diameter portion 621 and the small diameter portion 622 of the shaft portion 62, and the other end of the coil spring 64 is fixed to the upper end surface 637 of the cylindrical portion 63. . The coil spring 64 urges the cylindrical portion 63 away from the shaft portion 62, that is, downward.
The round pin 66 inserted into the shaft portion 62 is engaged with a step 635 formed in the circular hole 631 of the tube portion 63, thereby restricting the downward movement of the tube portion 63 relative to the shaft portion 62 in the axial direction. The

  As shown in FIG. 7, the stop pin 65 is inserted from the outside of the cylindrical portion 63 and reaches the space formed by the notch 624 of the shaft portion 62. The stop pin 65 abuts on the surface 625 formed by the notch 624, so that the movement of the cylindrical portion 63 relative to the shaft portion 62 is restricted. In other words, the cylindrical portion 63 is engaged with the shaft portion 62 with a play of a predetermined rotation angle.

[Operation of work support moving device]
With reference to FIG. 3 and FIG. 5, operation | movement of the workpiece support moving apparatus 1 is demonstrated.
The operation of the workpiece support moving device 1 described below is performed using the spindle 21 of the machine tool 2 before the workpiece 3 is installed on the machine tool 2. The operation of the spindle 21 in the following description is performed by an operator operating a controller or the like, and is automatically performed by a control device (not shown) of the machine tool 2 that can acquire information necessary for control. Also good.

First, the operator attaches the nut runner 6 to the main shaft 21. Thereafter, the main shaft 21 is moved so that the nut runner 6 and the transmission shaft end portion 733 are aligned with each other, and lowered on the spot.
At this time, if the rotation phase of the engagement hole 632 of the cylindrical portion 63 matches the rotation phase of the transmission shaft end portion 733, the transmission shaft end portion 733 is inserted into the engagement hole 632 as it is.

When the rotation phase of the engagement hole 632 is deviated from the rotation phase of the transmission shaft end portion 733, the transmission shaft end portion 733 is pressed against the guide portion 636 of the engagement hole 632 as the main shaft 21 is lowered.
Here, when the shift in the rotational phase between the engagement hole 632 and the transmission shaft end portion 733 is within the range of play of the rotation angle of the cylindrical portion 63, the transmission shaft end portion 733 is guided by the guide portion 636. The cylindrical part 63 is pushed in the circumferential direction. Then, the cylindrical portion 63 rotates, and the transmission shaft end portion 733 is inserted into the engagement hole 632 by matching the rotational phases of the engagement hole 632 and the transmission shaft end portion 733.

On the other hand, when the shift of the rotational phase between the engagement hole 632 and the transmission shaft end portion 733 is outside the range of play of the rotation angle of the cylindrical portion 63, the cylindrical portion 63 is pressed against the transmission shaft end portion 733. Accordingly, the coil spring 64 moves backward (moves upward) against the urging force of the coil spring 64. At this time, the operator slowly rotates the main shaft 21 while pressing the cylindrical portion 63 against the transmission shaft end portion 733. As a result, when the rotational phase shifts are within the range of play of the rotation angle of the cylindrical portion 63, the transmission shaft end 733 is pushed in the circumferential direction while being guided by the guide portion 636. Then, the engagement hole 632 rotates, and the rotation phases of the engagement hole 632 and the transmission shaft end portion 733 coincide with each other. Further, the cylindrical portion 63 is advanced by the urging force of the coil spring 64, and the transmission shaft end portion 733 is inserted into the engagement hole 632.
By inserting the transmission shaft end 733 into the engagement hole 632, the nut runner 6 and the transmission shaft 73 are engaged with each other, and the main shaft 21 and the driving force transmission mechanism 5 are connected.

Thereafter, the operator rotates the spindle 21 until the workpiece support 14 moves to a desired position.
Specifically, when the main shaft 21 rotates, the rotation of the main shaft 21 is transmitted to the transmission shaft 73 via the nut runner 6. The rotation of the transmission shaft 73 is changed in direction by 90 degrees by the first gear 71 and the second gear 72 and transmitted to the feed screw shaft 12. When the feed screw shaft 12 rotates, the nut 19 screwed to the feed screw shaft 12 moves along the feed screw shaft 12 and, at the same time, the seat block 18 connected to the nut 19 moves along the rail 11 together with the slider 17. .
When the work support 14 reaches a desired position, the rotation of the main shaft 21 is stopped. Finally, the feed screw shaft 12 is fastened by the lever 123 to fix the feed screw shaft 12 so that the workpiece support 14 does not move.
With the above operation, the workpiece support moving apparatus 1 can install the workpiece support 14 at a desired position.

In the table 23 of the machine tool 2 of the present embodiment, a plurality of workpiece support moving devices 1 are radially installed, and each transmission shaft end portion 733 has the same circumference around the rotation axis C of the table 23. Arranged above (see FIG. 2).
In FIG. 2, illustrations other than the feed screw shaft 12, the work support 14, and the transmission shaft end portion 733 are omitted for simplification of the drawing.

  When the workpiece support 14 is moved in the plurality of workpiece support moving devices 1, after the operation by the first workpiece support moving device 1 is finished, the main shaft 21 is lifted and the nut runner 6 and the transmission shaft 73 are moved. The engagement is released and the table 23 is rotated by a predetermined angle. As a result, the spindle 21 is aligned with the transmission shaft end 733 of the next workpiece support moving device 1. And in the next workpiece support body moving apparatus 1, the above-mentioned operation | movement is performed. By repeating such an operation, all the work support moving devices 1 can move the work support 14 to a desired position.

In particular, in this embodiment, the machine tool 2 has two main shafts 21. Therefore, in order to shorten the time, by using the two main shafts 21 at the same time, the two workpiece support moving devices 1 that are in a positional relationship of 180 degrees may perform the above-described operation at the same time.
In the plurality of workpiece support moving apparatuses 1, the installation positions of the workpiece supports 14 do not have to be on the same circumference, and may be, for example, staggered.

〔effect〕
According to this embodiment, the workpiece support 14 can be moved using the driving force of the main shaft 21 of the machine tool 2. For this reason, the setup for installing the workpiece support 14 at a desired position can be performed easily and in a short time compared to manual work.
Moreover, since the workpiece 3 is not originally processed at the time of such a setup, even if the spindle 21 is used, the machining flow of the workpiece 3 is not hindered. Further, since the existing spindle 21 is used for the machine tool 2, it is not necessary to prepare a dedicated actuator, and the apparatus can be reduced in size and cost.
Furthermore, since the moving distance of the work support 14 can be adjusted by the number of rotations and the rotation time of the main shaft 21, the work support 14 can be installed more accurately than when manually performed.

  In the driving force transmission mechanism 5 of the present embodiment, the nut runner 6 can be engaged with the output side transmission unit 7 by moving the main shaft 21 with the nut runner 6 mounted on the main shaft 21. Thereby, the main shaft 21 and the driving force transmission mechanism 5 can be easily connected.

  In the nut runner 6 of the present embodiment, the cylindrical portion 63 is supported by the shaft portion 62 so as to be movable in the axial direction, and the coil spring 64 biases the cylindrical portion 63 to the side away from the shaft portion 62. For this reason, even if it is a case where the mutual rotation phase of the engagement hole 632 and the transmission shaft end part 733 has shifted | deviated, it can avoid that the cylinder part 63 and the transmission shaft end part 733 collide strongly. Further, the transmission shaft end 733 is inserted into the engagement hole 632 by rotating the main shaft 21. For this reason, the main shaft 21 and the driving force transmission mechanism 5 can be reliably connected without detecting the rotational phase of the engagement hole 632.

  Further, in the nut runner 6 of the present embodiment, if the shift in the rotational phase with the engagement hole 632 is within the range of play of the rotation angle of the cylindrical portion 63, the engagement hole is not required to rotate. The transmission shaft end portion 733 can be inserted into 632. For this reason, the engagement hole 632 and the transmission shaft end 733 can be easily engaged.

[Second Embodiment]
With reference to FIG. 8, the workpiece support moving apparatus 1A of the second embodiment will be described.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The workpiece support moving device 1 according to the first embodiment includes one rail 11, a feed screw shaft 12, a workpiece support 14, and one output-side transmission unit 7, whereas the workpiece support according to the second embodiment. The moving device 1A includes three combinations including the rail 11, the feed screw shaft 12, and the workpiece support 14A, one output-side transmission portion 8 common to the three sets, and one nut runner 6. The output side transmission part 8 and the nut runner 6 constitute a driving force transmission mechanism.
In addition, in FIG. 8, illustration of members other than the feed screw shaft 12, the work support 14A, and the output side transmission part 8 is abbreviate | omitted about the work support body moving apparatus 1A.

The rails 11 and the feed screw shafts 12 are arranged along the radial direction of the table 23 so that they are evenly arranged radially about the rotation axis C. The shaft supports 15 and 16 may be configured to be able to support both ends of the feed screw shaft 12.
The workpiece support 14A has claw portions that can grip the workpiece 3 from the outside or the inside.

  The output side transmission unit 8 is disposed in the central hole 232 of the table 23 and is connected to the three sets of feed screw shafts 12. Specifically, the output-side transmission unit 8 includes a first gear 81 fixed to each of the three sets of feed screw shafts 12, a second gear 82 that meshes with the three first gears, and a second gear at one end. The gear 82 is fixed, and the other end portion has a transmission shaft 83 constituting a transmission shaft end portion 831. The first gear 81 and the second gear 82 are miter gears, respectively, and the configuration of the transmission shaft 83 is the same as that of the transmission shaft 73 of the first embodiment.

In the second embodiment, after the workpiece 3 is placed on the table 23 of the machine tool 2, the nut runner 6 attached to the main shaft 21 is connected to the output side transmission unit 8. Thereafter, using the rotational force of the main shaft 21, the three workpiece supports 14A are simultaneously moved at the same speed. Thereby, the workpiece 3 can be aligned with the rotation axis C of the table 23.
Moreover, according to the workpiece support moving apparatus 1A of the second embodiment, the same effects as those described in the first embodiment can be obtained.

[Modification]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
Although the rail 11 of each embodiment is installed on the rotatable circular table 23, this invention is not limited to this. For example, the rail of the present invention may be installed on an XY table or the like, or may be installed on a work support unit other than the table.
The feed drive mechanism of the present invention is not limited to the ball screw type drive mechanism as in the above embodiment, and may be a rack and pinion type or belt type feed drive mechanism. In the case of the rack and pinion type, the rack may be arranged along the rail 11 instead of the feed screw shaft 12. In the case of the belt type, a part of the belt is arranged along the rail 11 and a part of the belt is placed on the work piece. What is necessary is just to connect to the support bodies 14 and 14A.

Moreover, the input side transmission part of this invention is not limited to being the nut runner 6 which has the cylinder part 63 like each embodiment. For example, when screw holes are formed in the end surfaces of the transmission shaft end portions 733 and 831, the input side transmission portion of the present invention may be a driver having a tip portion that engages with the screw holes.
In addition, the guide portion 636 of each embodiment has a circular edge shape on the near side in the insertion direction, but the present invention is not limited to this. For example, the edge shape on the near side in the insertion direction is the same angular shape as the engagement hole 632. There may be.
In each embodiment, the work supports 14 and 14A are composed of the slider 17, the seating block 18, and the nut 19, but they may be integrated with each other.
Further, the urging portion of the present invention is not limited to the coil spring 64, but may be another type of spring or the like.

  The present invention can be used for a work support moving device for moving a work support that supports a work.

  DESCRIPTION OF SYMBOLS 1,1A ... Work support body moving apparatus, 2 ... Machine tool, 3 ... Work, 5 ... Driving force transmission mechanism, 6 ... Nutrunner, 62 ... Shaft part, 63 ... Tube part, 632 ... Engagement hole, 636 ... Guide 64, coil spring, 7, 8 output side transmission unit, 11 rail, 12 feed screw shaft constituting the feed drive mechanism, 14, 14A work support, 21 spindle, 23 table.

Claims (4)

Rails installed on the workpiece support of the machine tool;
A feed drive mechanism disposed along the rail;
A workpiece support guided by the rail and driven by the feed drive mechanism;
A workpiece support moving device comprising: a driving force transmission mechanism that can be coupled to a spindle of the machine tool and that can transmit a driving force of the spindle to the feed driving mechanism. The driving force transmission mechanism is
An input-side transmission unit detachable from the main shaft;
An output-side transmission portion that engages with the feed drive mechanism,
The workpiece support moving device according to claim 1, wherein the input-side transmission unit and the output-side transmission unit are engageable with each other. The input side transmitter is
A shaft that is rotationally driven by the main shaft;
An engagement portion supported by the shaft portion so as to be movable in the axial direction and engageable with a transmission shaft end portion of the output-side transmission portion;
The work support moving apparatus according to claim 2, further comprising: an urging portion that urges the engaging portion toward a side away from the shaft portion. The engagement portion has an engagement hole into which the transmission shaft end portion is inserted, and is supported via play of a predetermined rotation angle with respect to the shaft portion,
The guide part which the inner dimension of the said engagement hole reduces gradually toward the insertion direction of the said transmission-shaft edge part is formed in the opening edge of the said engagement hole. Work support moving device.

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