JPH07223147A - Index table - Google Patents

Abstract

PURPOSE:To provide a thin type index table having long service life, high machining accuracy and simple structure, regarding an index table where an indexing and positioning coupling is mounted and demounted with the tool head of a machine tool. CONSTITUTION:A turning shaft 2 integrated with a table 1 is laid in a table case 17, so as to be freely rotatable and incapable of shifting in an axial direction, and the engagement teeth 11 of a three-piece type coupling are faced to a turning gear 5 fixed to the table 1 and a stationary gear 23 fixed to the table case 17, thereby being made capable of advance and retreat. Also, the axial shifting operation of an operation lever 27 in a direction intersecting the shaft 2 is converted to a linear rotating motion or the rotating motion of a rotary member 7 via linear oscillating motion converting mechanisms 37 and 24. The rotating motion so obtained is further converted to the axial shift of the teeth 11 in parallel to the shaft 2 via a spiral element pair. Also, the lever 27 is operated in axial and rotation directions with an operation tool 44 mounted on the tool head of a machine tool, thereby fixing, releasing and indexing the table l.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an index table for machining a workpiece, and more particularly to an apparatus for indexing the table and inserting and removing a coupling for positioning the table by a tool head of a machine tool.

[0002]

2. Description of the Related Art In order to perform multi-sided machining of a work in a single setup operation, it is widely practiced to mount the work on an index table for machining. As a conventional index table, there is one disclosed in an application previously filed by the present applicant (Japanese Patent Laid-Open No. 5-185351). This apparatus is shown in FIG. 9 and FIG. 10, and an operating rod 27 is axially movably and rotatably supported by a table case 17 of the rotary table 1, and one end of the operating rod 27 has a part of a circumference. The handle 26 having the engaging notch 39 is fixed to the notch 3
9 is mounted on the tool head of the machine tool, and the operating tool 44 and the handle 2 are mounted on the tool head.
6 is engaged and the tool head is operated by the NC device on the machine tool side to rotate the operating rod 27 and axially move it, thereby rotating the rotary table 1 and engaging / disengaging the positioning coupling 50. Is being done.

For indexing the rotary table, a worm 32 is attached to the operating rod 27 so as to be axially movable and non-rotatable, and a worm wheel 19 rotationally connected to the rotary table 1 is meshed with the worm 32. The rotary motion of the operating rod 27 is converted into the index rotary motion of the rotary table 1. At this time, the minimum indexing pitch of the rotary table 1 is set to correspond to one rotation of the operating rod 27, and the engaging notch 39 of the handle 26 always faces a fixed direction regardless of the indexing position of the table 1. In this way, the engagement between the operation tool 44 and the handle 26 can always be easily realized.

A coupling 50 for fixing the rotary table 1 at a predetermined indexing position is composed of rotary teeth 5 fixed to the rotary table 1 and fixed teeth 23 fixed to the table case 17, and the table 1 is provided with its rotary shaft. The swivel tooth 5 and the fixed tooth 23 are disengaged by advancing and retracting in the direction. For the forward / backward movement of the table 1, a feed screw 51 which is axially immovable and rotatably attached to the table case 17 is provided behind the turning shaft 2 of the table 1, and the feed screw 51 moves axially with respect to the table case 17. This is done by screwing a nut member 52 mounted so as to be rotatable but non-rotatable and transmitting the axial movement of the nut member 52 to the swivel shaft 2. The rotation of the feed screw 51 causes the rack 53 provided on the operating rod 27 and the pinion 54 pivotally supported on the table case 17 to mesh with each other.
The pinion 54 is rotated by axial movement of the operating rod 27, and this rotation is transmitted to the feed screw 51 via the toothed belts 55 and 56.

[0005]

However, when a work is mounted on the rotary table having the above-mentioned structure and heavy cutting is performed, the cutting reaction force to the work is converted into a force in the axial direction of the table through the coupling 50, and the rotary shaft of the rotary shaft is rotated. Feed screw 5 provided at the rear
1 and the nut member 52 are concentrated in the threaded portion, causing fatigue, which shortens the life of the device. Also,
In this type of device, it is necessary to make the device thin in order not to reduce the maximum machining size of the workpiece, but in the above structure, the feed screw 51 for advancing and retracting the table needs to be arranged behind the turning shaft, so the device is In order to reduce the thickness, it is necessary to shorten the swivel axis of the table, and when a heavy object is mounted on the table, there is a problem that the swivel axis is twisted and the machining accuracy is reduced. Such a problem remarkably appears in a large index table.

Further, since the coupling is engaged and disengaged by advancing and retracting the table, the cutting chips enter the inside of the case during the advancing and retracting operation, which hinders the advancing and retracting operation of the table, and improves the positioning accuracy of the table. There is a problem of lowering it, and it is necessary to connect the worm wheel 19 for transmitting the rotational force to the advancing / retreating table and the turning shaft 2 of the table so as to be axially slidable and non-rotatable, which makes the structure complicated. There was a problem.

An object of the present invention is to solve the above-mentioned problems of the conventional apparatus. In an index table in which the table is indexed and positioned by the tool head of a machine tool, the service life is long and the machining accuracy is high. It is intended to provide a thin and thin index table that is simple in structure.

[0008]

In the first structure of the index table according to the present invention, the indexing positioning of the table 1 is performed by a three-piece type coupling. In the three-piece type coupling, the rotary teeth 5 fixed to the rotary table 1 and the fixed teeth 23 fixed to the table case 17 are provided on the same surface, and the engaging teeth 11 are simultaneously meshed with the rotary teeth 1 to form the rotary table 1. Fix it. In the case of this structure, the rotary shaft 1 which is substantially integrated with the rotary table 1 is attached to the table case 1.
7 is provided so as to be rotatable and immovable in the axial direction, and the engaging tooth 11 is provided so as to face the swivel tooth 5 and the fixed tooth 23 so as to be movable back and forth in the axial direction.

The forward / backward movement of the engaging teeth 11 corresponds to the axial movement of the operating rod 27 in the direction intersecting with the swivel shaft 2 through a linear rotary motion or a linear swing motion conversion mechanism 37, 24 to rotate the rotary member (screw 7). , The screw ring 9, the cam disc 71, the cam ring 74, etc. are converted into rotational movements, and the rotation of the rotary member is converted into a spiral element pair (a male screw of the screw 7 and a female screw of the screw ring 9, a spiral groove 70). This is performed by converting the cam roller 76, etc.) into axial movement in a direction parallel to the turning shaft 2. This spiral element pair includes the above-mentioned rotating member (screw 7 and cam ring 74 in the embodiment) which is rotatable about the swivel axis 2 and is not axially movable with respect to the table 17, and an advancing / retreating member which is non-rotatable and axially movable. (In the example, the screw ring 9 and the cam disc 71 are provided). The spiral element pair is composed of a male screw element and a female screw element, but the male screw element side can be the rotating member or the female screw element side can be the rotating member. Engaging teeth 11
Is fixed to the advancing / retreating member.

Second index table according to the present invention
In the above structure, the indexing positioning of the table 1 is performed by a two-piece type coupling. In the two-piece type coupling, the rotary tooth 5 fixed to the rotary table 1 and the fixed tooth 23 fixed to the table case 17 are opposed to each other, and both are meshed with each other to fix the rotary table 1. In the case of this structure, the swivel shaft 2 substantially integrated with the rotary table 1 is provided on the table case 17 so as to be rotatable and axially movable, and the axial movement of the swivel shaft 2 causes the engagement between the swivel teeth 5 and the fixed teeth 23. Take off.

The forward / backward movement of the swivel shaft 2 is similar to that of the first structure described above. The axial movement of the operating rod 27 in the direction intersecting with the swivel shaft 2 is converted into a linear rotary motion or a linear swing motion conversion mechanism 3.
It is performed by converting the rotary motion of the rotary member via 7, 24, and converting the rotary motion of the rotary member into axial movement in a direction parallel to the swivel axis 2 by the spiral element pair. This spiral element pair includes a rotating member (screw 7 and cam ring 74 in the embodiment) that is rotatable about the swivel axis 2 and is not axially movable with respect to the table 17, and an advancing / retreating member that is non-rotatable and axially movable ( Example screw ring 9 and cam disk 7
1), respectively. The advancing / retreating member is the pivot 2
Is provided so as to be relatively rotatable and immovable in the relative axial direction.

An operating rod 27 having a handle 26 at one end
Is axially movably and rotatably supported by the table case 17, and the operating tool 44 mounted on the tool head of the machine tool and the handle 26 are engaged to rotate the operating rod 27 and axially move. . The axial movement of the operating rod 27 is converted into the rotational movement of the rotary member via the linear rotary motion or the linear swing motion conversion mechanism, and is further converted into the advance / retreat motion of the advance / retreat member via the spiral element pair. The artificial teeth 11 or the rotary shaft 2 is moved back and forth to fix and release the rotary table 1. Further, the rotation of the operating rod 27 is transmitted to the swivel shaft 2 to perform the rotary indexing operation of the rotary table 1.

The engagement of the swivel tooth 5 and the fixed tooth 23 with the engaging tooth 11 (in the case of a three-piece coupling) or the fixed tooth 2
In order to absorb the position error of the advancing end of the advancing / retreating member (screw ring 9 and cam disc 71 of the embodiment) at the time of meshing of 3 and swivel tooth 5 (in the case of two-piece coupling), the transmission path of the movement stroke thereof. It is preferable to provide spring members such as the disc springs 16 and 78 and coil springs therein. This spring member may be provided internally in the operation tool 44 mounted on the tool head of the machine tool for operating the operation rod 27 (see the disc spring 64 in FIG. 6).

[0014]

In the index table having the structure of the present invention, since the engaging teeth 11 or the revolving teeth 5 for indexing and positioning the rotary table are advanced and retracted by the spiral element pair having a large diameter, the indexing position is firmly fixed. It is possible to avoid the concentration of cutting reaction force.

A screw 7 is mounted on the outer periphery of the rotary shaft 2 of the rotary table 1 so as to be rotatable and immovable in the axial direction.
In the case of the three-piece coupling structure equipped with, the large diameter screw 7 and screw ring 9 can be used without thickening the table case 17.
Therefore, the cutting reaction force with respect to the work can be dispersed over the entire screw, and the concentration of fatigue can be avoided. Even if the table case 17 is made thin, the swivel shaft 2
Since it can be lengthened, it is suitable for the structure of a large index table that carries heavy objects.

The three-piece coupling 50 that connects the swivel tooth 5 and the fixed tooth 23 with the engaging tooth 11 needs to move the table 1 forward and backward when the engaging tooth 11 for positioning the rotary table 1 is disengaged. Since there is no blade, it is possible to prevent chips from entering the coupling 50 and the shaft support of the rotary table, and to fix the worm wheel 19 that transmits the rotational force to the table 1 to the swivel shaft 2. The structure of can be simplified and the rigidity of the table can be increased.

In the two-piece coupling structure in which a cam disc is mounted on the side opposite to the table of the rotary shaft and the cam disc is rotated by the cam ring 74, the large-diameter cam ring 74 is used to cut the weight and cut the workpiece. The reaction force can be received, and the life of the device can be extended as compared with the conventional device.

Further, the coupling for fixing the rotary table 1 at a predetermined indexing position has a two-piece structure of the swivel tooth 5 and the fixed tooth 23, the number of parts is small, and the structure is simple. The cost can be reduced. Therefore, it is suitable for the structure of a small index table.

Advancing and retracting members 9, 71 for engaging and disengaging the coupling
The structure in which the operation tool 44 is internally provided with the spring member 64 for absorbing the position error of the advancing end can simplify the structure of the index table main body, and a plurality of tables used in one machine tool can use the same operation tool 44. Therefore, the number of spring members 64 to be mounted can be reduced.

[0020]

1 to 3 show a first embodiment of the present invention. A hollow swivel shaft 2 is fixed by a bolt 3 to the center of the rear surface of a rotary table 1 on which a work is mounted, and a ring-shaped circumferential groove 4 is provided in the peripheral edge of the rear surface of the table 1, and an inner diameter side thereof is provided. The swivel tooth 5 is fixed. A cylindrical screw 7 having a small diameter portion 7a on the table side and a large diameter portion 7b on the opposite table side is rotatably fitted on the outer periphery of the swivel shaft 2 by a bearing metal 6. A screw ring 9 is screwed onto the screw 7. The screw ring 9 has a plurality of through holes 8 parallel to the central axis thereof.

A slide disk 12 is slidably fitted in the small-diameter portion 7a of the screw 7, and the slide disk 1
A ring-shaped engaging tooth 11 provided with a meshing tooth that meshes with the inner diameter side of the swivel tooth 5 is fixed to the outer diameter side front surface of 2. The large diameter portion 7b of the screw 7 serves as a rotary gear 13 with teeth provided on the outer circumference.

The screw ring 9 and the slide disk 12 are connected to each other by guide bolts 14 arranged at four locations on the peripheral surface so as to be relatively movable in the axial direction and not relatively rotatable. That is, the guide bolt 14 is planted on the slide disk 12,
The neck portion of this guide bolt slidably penetrates through a through hole provided in the screw ring 9. A cylindrical recess 15 coaxial with the guide bolt 14 is provided on the side surface of the screw ring 9 on the side of the slide disk, and a conical spring 16 inserted in the recess provides the screw ring 9 and the slide disk. And 12 are urged in the separating direction.

The disc spring 16 is provided so that the engaging tooth 11 meshes with the fixed tooth 23 described later and the swivel tooth 5 without a gap. That is, the screw ring 9
It suffices if the advance position of (1) can be accurately defined, but since the adjustment of the rotation angle of the screw 7 becomes troublesome, a disc spring 16 is provided to provide a certain degree of tolerance. Therefore, even if the advanced position of the screw ring 9 is slightly displaced, the engagement between the engaging tooth 11, the fixed tooth 23 and the swivel tooth 5 is completely ensured.

The swivel shaft 2 is located at a position projecting from the end surface of the screw 7 on the large diameter portion 7b side, and the bearing portion 1 of the table case 17 is provided.
A worm wheel 19 is fixed by a screw 21 to the shaft end projecting to the opposite side through the bearing 18. The bearing portion 18 and the screw 7 of the table case 17 are sandwiched between the thrust portion 6a of the bearing metal 6 and the worm wheel 19, and the screw 7 is rotatable about the swivel shaft 2 and is not axially movable. .

Outside 4 of bearing portion 18 of table case 17
A guide pin 22 is planted in parallel with the swivel shaft 2, and the guide pin 22 is slidably fitted in the through hole 8 of the screw ring 9 so that the screw ring 9 cannot rotate and the shaft does not rotate. It guides you in any direction. Table case 1
A ring-shaped fixed tooth 23 is fixed to the table mounting surface of 7, and the fixed tooth 23 is set on the outer diameter side of the circumferential groove 4 of the table. On the upper part of the table case 17, a fan-shaped swing gear 24 is rotatably supported by a pin 25 parallel to the turning shaft 2, and the swing gear and the rotary gear 13 are meshed with each other.

On the upper part of the table case 17, as shown in FIG. 3, an operating rod 27 having a disk-shaped handle 26 fixed to the tip is mounted in a direction orthogonal to the turning shaft 2. The operating rod 27 includes the bearings 28 and 29 for the table case 1.
7 is mounted so as to be slidable and rotatable in the axial direction, and a worm 32 is mounted at an intermediate portion thereof by a spline 31 so as to be relatively movable in the axial direction and non-rotatable. The worm 32 is a bracket 3 fixed to the table case 17.
3 and a bearing 29, the axial position of which is defined and meshes with the worm wheel 19.

Further, the handle 26 at the intermediate portion of the operating rod 27
A connecting member 35 is relatively rotatably fitted between the two contact plates 34 formed on the side, and a rod 37 is pivotally attached to the connecting member 35 by a pin 36 parallel to the turning axis 2. . The tip of the rod 37 is connected to the swing gear 24 by a pin 38. Therefore, the axial movement of the operating rod 27 causes the swing gear 24 to swing and the screw 7 to rotate via the rotary gear 13. With this structure, the operating rod 2
The rotation angle of the screw 7 can be increased with a small movement amount of 7.

An engaging notch 3 is provided at one position on the circumference of the handle 26.
9 and a fitting recess 41 are provided, and the table case 17 is provided with a handle cover 42 surrounding the outer periphery of the handle 26, and a locking ball urged by a spring attached to the upper portion of the handle cover 42. 43 fits into the fitting recess 41 to define the rest position of the handle 26.

FIG. 4 shows the engaged state of the operating tool 44 mounted on the tool head of the machine tool and the handle 26. The operating tool 44 has an engagement notch 39 on the handle 26.
It has a shaft 45 that engages with the shaft, and two flanges 46 and 47 that are provided on both sides of the shaft and that sandwich the handle 26. A cutout 48 is provided between the proximal flange 47 and the shaft 45. Has been. This constriction 48 is formed by engaging teeth 11
The index table is provided to protect the index table from improper engagement with the operation tool 44 and the operation tool 44 from being out of the predetermined range. When abnormal force is applied to the shaft 45, the shaft 45 breaks at the constriction 48, and damage is minimized. It is something that can be stopped.

Next, the rotation indexing operation of the table 1 in the index table of the first embodiment will be described. The operation tool 44 is mounted on the tool head of the machine tool by the auto tool changer, and the operation tool 44 is engaged with the handle 26 and the operation rod 27 is pushed into the table case 17 by NC control of the tool head. Operation rod 2 at this time
By the axial movement operation of 7, the connecting member 35 and the rod 3
The screw 7 is rotated approximately 180 degrees via the 7, the swing gear 24, and the rotary gear 13. As a result, the screw ring 9 moves (retracts) to the side opposite to the table, and the engagement between the engaging tooth 11 and the fixed tooth 23 and the revolving tooth 5 is released.

In this state, the tool head is revolved around the axis of the operating rod 27, and the operating rod 27 is rotated a necessary number of times. This rotary motion is transmitted to the swivel shaft 2 via the worm 32 and the worm wheel 19, and the rotary table 1
The index rotation is performed. At this time, the screw ring 9 is guided by the guide pin 22 and the screw 7 meshes with the swing gear 24, so that the screw 7 does not rotate. After the indexing operation is completed, the swing lever 24 is pulled back by pulling back the operating rod 27.
Rotates in the reverse direction to move (forward) the screw ring 9 to the table side. Then, at the forward end position of the screw ring 9, the engagement tooth 11 simultaneously meshes with the fixed tooth 23 and the swivel tooth 5, and the table 1 is fixed at a new indexing position.

5 and 6 show a second embodiment of the present invention. In the first embodiment, the screw disk 9 is provided with the slide disk 12 via the disc spring 16, and the engagement tooth 11 is provided on the slide disk 12, whereby the engagement tooth 1 is formed.
1, the fixed tooth 23 and the swivel tooth 5 are accurately meshed with each other, but in the second embodiment, the engaging tooth 11 is directly provided on the screw ring 9, and the engaging tooth 11 and the fixed tooth 23 are provided.
The engagement with the swivel teeth 5 is ensured by the disc spring 64 installed in the operation tool 44 shown in FIG.

That is, the operation tool 44 of the second embodiment is
An axial guide hole 60 is provided at the tip of the shaft, a lid 62 having a center hole 61 is fixed to the opening, and a shaft 45 having a flange 46 at the tip is inserted through the center hole. The end is screwed into a block 63 slidably accommodated in the guide hole 60, and a disc spring 64 is interposed between the lid 62 and the block 63. In the normal state, the block 63 is in contact with the bottom portion of the guide hole 60, and the cutout 48 of the shaft is located outside the lid 62. Disc spring 6
Instead of 4, a coil spring can be used. In addition,
The operating tool shown in FIG. 6 needs to be retracted more than the operating rod shown in FIG. 4 when the operating rod is pulled in order to fix the rotary table after it has been split, and the NC control program needs to be changed. .

7 and 8 show the third embodiment of the present invention. In this embodiment, the rotary shaft 2 of the rotary table is provided so as to be movable in the axial direction, and the table 1 is moved forward and backward.
The structure is such that the swivel tooth 5 provided in the above is directly meshed with the fixed tooth 23 to determine the indexing position, and the swivel shaft 2 is advanced and retracted by the cam disk 71 having a spiral groove.

A cam disk 71 having six short spiral grooves 70 on the outer peripheral surface thereof is fitted on the opposite side of the rotary shaft 2 which is substantially integrated with the table 1 so as to be relatively rotatable. The swivel shaft 2 penetrates the cam disc 71, and a spring contact 77 is screwed to the shaft end protruding to the rear of the cam disc, and a disc spring 78 is interposed between the spring contact and the cam disc 71. It is equipped. At the axial position of the cam disc 71, the disc spring 78 is located at the cam disc 71.
Is pressed against a step provided on the swivel shaft 2. The cam disc 71 is a pivotal guide bolt 72 that is planted in the table case 17, and cannot rotate with respect to the table case 17.

A circumferential groove 73 is provided in the table case 17 coaxially with the turning shaft 2, and the cam ring 7 is fitted in the circumferential groove 73.
4 is rotatably fitted. The cam rollers 76 projectingly provided at six positions on the inner peripheral surface of the cam ring 74 are fitted into the six spiral grooves 70 of the cam disc 71, respectively. An operating rod 27 is mounted below the table case in a direction orthogonal to the turning shaft, and a tip of a rod 37 connected to the operating rod 27 is connected to a cam ring 74 by a connecting pin 36 in the turning shaft direction. ing.

A worm 32 is mounted on the operating rod 27 in a structure similar to that of the first embodiment, and this worm meshes with the worm wheel 19. The worm wheel 19 is mounted on the swivel shaft 2 via a spline so as to be relatively movable in the axial direction and non-rotatable relative to the swivel shaft 2, and is also mounted to be rotatable relative to the table frame 17 and non-movable in the axial direction.

When the operating rod 27 is pushed in by the operating tool 44 (see the first embodiment) mounted on the tool head, the cam ring 74 rotates rightward in FIG. 8 via the rod 37,
The cam roller 76 moves the cam disc 71 to the left in FIG. 7 to move the table 1 forward, so that the turning teeth 5 mounted on the table 1 are disengaged from the fixed teeth 23 fixed to the table frame 17.

In this state, the table 1 is ready for indexing, so that the operating rod 27 is rotated a necessary number of times. This rotation operation is performed by the worm 32 and the worm wheel 1
It is transmitted to the rotary shaft 2 via 9 and the rotary table 1 is indexed and rotated. At this time, the cam disk 71 is constrained by the guide bolt 72 and cannot rotate, and the cam ring 74 also does not rotate. By pulling back the operating rod 27 after the completion of the indexing rotation, the cam ring 74 is rotated in the reverse direction to move the cam disc 71 to the counter rotation table side. As a result, the swivel tooth 5 meshes with the fixed tooth 23 and the table 1 is fixed at a new indexing position, and the disc spring 78 ensures the meshing of the swivel tooth 5 and the fixed tooth 23. In this embodiment, since the rotary table 1 and the cam disk 71 are arranged on both sides of the bearing portion of the rotary shaft, the rotary shaft is less likely to be twisted when a heavy object is mounted on the rotary table. Can be processed.

The cam ring and the cam disc shown in the third embodiment can be used in place of the screw and the screw ring of the first and second embodiments. The structure using the cam ring and the cam disc is suitable for high-precision heavy cutting because the rotary table is firmly fixed by the cam mechanism. If the spiral groove is provided with play, the fixing force of the rotary table, which is related to the change in the movement amount of the operating rod, can be kept constant. Furthermore, since the frictional resistance between the cam roller and the cam disc is small, the operating rod can be operated with a small force.

By replacing the cam ring and the cam disc of the third embodiment with the screw and screw ring shown in the first embodiment, and reversing the positional relationship between the screw and screw ring and the worm wheel. It is possible to obtain an index table with a simple structure and a long life.

[0042]

In the three-piece coupling of the index tables of the present invention described above, the screw for engaging and disengaging the engaging teeth is provided on the outer periphery of the turning shaft of the table, so that the work is fixed to the table. Even when heavy cutting is performed, the cutting reaction force on the work can be received by the large-diameter screw via the engaging teeth, so that the load acting on the member can be reduced and the life of the device can be extended.
In addition, since it is not necessary to place a screw behind the turning axis, the table case can be made thin and the turning axis can be lengthened, and when a heavy object is placed on the turntable, no kinking occurs and heavy cutting is possible. It is possible to provide a large-sized index table in which processing accuracy does not deteriorate.

Further, since the engaging teeth are moved back and forth to eliminate the axial movement of the table, there is no gap between the rotary table and the table case during indexing, and there is no possibility of cutting chips entering the table case. Intrusion can be prevented. Further, there is an effect that a rotation transmitting means such as a worm wheel can be fixed to the turning shaft, the structure is simple and the rigidity can be increased.

A two-piece coupling that drives a cam disk provided on the turning shaft with a cam ring is
Since the weight of the work and the cutting reaction force are received by the cam ring mounted on the side opposite to the table, the twisting of the pivot is less likely to occur than in the conventional device, and the life of the device can be extended.
Further, compared with a three-piece coupling, the number of parts is small and the structure can be simple, and a small index table can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an index table according to a first embodiment.

FIG. 2 is an exploded sectional view of the index table of the first embodiment.

FIG. 3 is a sectional view of part A in FIG.

FIG. 4 is a sectional view showing an operation tool and a handle.

FIG. 5 is a sectional plan view of the second embodiment.

FIG. 6 is a sectional view of the operation tool.

FIG. 7 is a sectional side view of the third embodiment.

FIG. 8 is a sectional view of part B in FIG.

FIG. 9 is a partial sectional front view of a conventional device.

FIG. 10 is a sectional view of a portion C in FIG.

[Explanation of symbols]

 1 rotary table 2 swivel axis 5 swivel tooth 7 screw 9 screw ring 11 engaging tooth 16 disc spring 17 table case 19 worm wheel 23 fixed tooth 26 handle 27 operating rod 32 worm 44 operating tool 64 disc spring 70 spiral groove 71 cam disk 74 Cam ring 76 Cam roller 78 Disc spring

Claims (5)

[Claims] 1. A rotary table (1) in a table case (17).
Is provided so as to be rotatable about the swivel axis (2) but not axially movable, the swivel tooth (5) is provided on the rotary table (1), and the fixed tooth (23) is provided on the table case (17). 2) A non-rotatable screw ring (9) that moves forward and backward with a screw (7) rotatably mounted on the outer periphery of
An operating rod (27) provided with engaging teeth (11) for simultaneous fitting and removal on (23) and a handle (26) on one end of the table case (17) is axially movably and rotatably supported. , The operating tool (44) mounted on the tool head of the machine tool and the handle (26) are engaged to rotate and axially move the operating rod (27), and axially move the operating rod (27). Linear rotation motion conversion mechanism (37), (2
4) to the screw (7) and the screw ring (9)
The engaging tooth (11) attached to the
An index table characterized by fixing and releasing the lock of the operating rod (27) and transmitting the rotation of the operating rod (27) to the rotating table (1) for indexing the rotation. 2. A rotary table (1) in a table case (17)
Is provided so as to be rotatable about its swivel axis (2) and movable in the axial direction, and a cam disk (71) that is relatively rotatable with respect to the swivel axis and cannot move in the axial direction is immovable with respect to the table case. A cam ring (74) provided with a protruding cam roller (76) that fits in the spiral groove (70) of the cam disc (71) is provided on the table case (17) so as to be immovable in the axial direction and freely rotatable. (1) is provided with a swivel tooth (5) and a fixed tooth (23) meshing with the swivel tooth is provided in the table case (17), and the table case (17) is provided with a handle (26) at one end. 27)
Is rotatably and rotatably supported, and the operating tool (44) mounted on the tool head of the machine tool is engaged with the handle (26) to rotate the operating rod (27) and move axially. The axial movement of the operating rod (27) is performed by the linear swing motion conversion mechanism (37).
The cam ring (74) is rotated through the cam ring (74), the rotation of the cam ring (74) is converted into the axial movement of the cam disc (71) through the cam roller (76), and the revolving shaft is moved back and forth to rotate the rotary table ( An index table characterized by fixing and unfixing 1) and transmitting the rotation of the operating rod (27) to the rotary table (1) to perform the rotary indexing operation. 3. A rotary table (1) on a table case (17)
Is provided so as to be rotatable about its swivel axis (2) and not axially movable, and a cam disk (71) coaxial with the swivel axis is provided so as not to be rotatable and axially movable with respect to the table case (17). Together with the cam roller (7) that fits in the spiral groove (70) of the cam disc (71).
6) A cam ring (74) protruding from the table case (17) is installed in the table case (17) so that it cannot move in the axial direction and is rotatable, and the rotary table (1) is provided with swivel teeth (5) and the table case (17) is fixed.
Provided with (23), engaging teeth (11) that engage and disengage both (5) and (23) at the same time.
Is provided on the cam disk (71), and the table case (17) has an operating rod (27) provided with a handle (26) at one end, which is axially movably and rotatably supported to provide a tool head for a machine tool. The operating rod (44) and the handle (26) mounted on the
(27) rotates and moves in the axial direction, and the axial movement of the operating rod (27) is transmitted through the linear swing motion conversion mechanism (37) to rotate the cam ring (74) to move the cam ring. The rotation is converted to the axial movement of the cam disc (71) via the cam roller (76) to move the engaging teeth (11) mounted on the cam disc (71) forward and backward to fix the rotary table (1). An index table characterized by releasing and fixing and transmitting the rotation of the operating rod (27) to the rotary table (1) for indexing the rotation. 4. The turntable (1) in the table case (17)
Is rotatably and axially movable around its swivel axis (2), and is mounted on the table case (17) so as to be rotatable and axially immovable. 9) is provided on the swivel shaft (2) so as to be rotatable but not axially movable, the swivel tooth (5) is provided on the rotary table, and the fixed tooth (23) that meshes with the swivel tooth is provided on the table case (17). The table case (17) has an operating rod (27) provided with a handle (26) at one end, which is axially movably and rotatably supported, and the operating tool (44) and handle attached to the tool head of the machine tool. By engaging with (26), the operating rod (27) is rotated and moved in the axial direction, and the axial movement of the operating rod (27) is transferred through the linear rotary motion conversion mechanism (37), (24). The rotary table (1) is transferred to the screw (7) and the rotary shaft mounted on the screw ring (9) is moved back and forth to lock and unlock the rotary table (1). (2
An index table characterized by transmitting the rotation of 7) to a rotary table (1) for indexing the rotation. 5. A spring member (64) for absorbing the positional error of the advancing / retreating members (9) and (71) that engages and disengages the rotary table (1) fixing coupling, operates the operating rod (27). An index table according to claim 1, 2, 3 or 4, characterized in that it is mounted in an operating tool (44) mounted on the tool head of a machine tool for operation.