JP2012020355A - Tilt table device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilt table device which is provided with a spring clamp device on a tilt table to dispense with a rotary joint.SOLUTION: The tilt table device 1 includes the tilt table 4 swingably and rotatably supported by a pair of shaft support mechanisms 2 and 3 eccentrically and concentrically with rotary shaft centers thereof, and a rotation driving means 5 provided for one of the pair of shaft support mechanisms 2 and 3. The tilt table 4 is provided with one or a plurality of spring clamp devices 6 capable of clamping a workpiece W to be set on the tilt table 4 by an elastic force of a spring, and a clamp switching means 8 is provided outside the tilt table, the clamp switching means capable of alternately switching the one or plurality of clamp devices 6 between a clamp state and an unclamp state when the tilt table 4 is positioned at a workpiece change position. The clamp device 6 contains a clamp body, a gripping member, a clamp rod, a support mechanism supporting the gripping member, a spring cylinder, and so on.

Description

  The present invention relates to a tilt table device for setting a workpiece to be used for machining, and in particular, a clamp switching means for providing a spring clamp device to the tilt table and switching the clamp device between a clamped state and an unclamped state. Is provided on the stationary side outside the tilt table.

Conventionally, in order to be able to change the posture of a workpiece by setting a workpiece to be machined, a pair of shaft support mechanisms can be swung or rotated along a locus eccentric with respect to their rotation axis. A tilt table device having a supported tilt table and a rotation driving means mounted on at least one of a pair of shaft support mechanisms is widely used.
Conventionally, a work is usually mounted on a tilt table and the work is fixed by a plurality of bolts. However, recently, in order to automate the machining line, in order to fix / unfix the work set on the tilt table, one or more fluid pressure driven clamping devices are often provided on the tilt table. I came.

  For example, in Patent Document 1, one end side of a tilt table is supported by an inclination drive unit via an upright plate for eccentric support, and the other end side of the tilt table is supported by a support device via an upright plate for eccentric support. A plurality of hydraulic clamping devices are supported on the tilt table, and a rotary joint for connecting eight hydraulic passages to the supporting device is provided in order to secure a hydraulic system for supplying and discharging to these clamping devices. A number of synthetic resin rotary seals greater than the number of hydraulic passage systems are incorporated in the rotary joint.

  As the fluid pressure driven clamp device, the clamp device described in Patent Document 2 is also employed. As shown in FIG. 5, the clamp device includes a clamp body 2, a grip member 6, a clamp rod 11, a support member 26 that supports the lower end of the grip member 6, and a dish that supports the support member 26 from below. It has a spring 25 and a hydraulic cylinder that drives the clamp rod 11 to move up and down. The disc spring 25 is mounted in a compressed state between the clamp body 2 and the support member 26. When the clamp rod 11 is driven downward when clamping the workpiece, the grip member 6 is supported by the disc spring 25 and the diameter is increased to grip the inner peripheral surface of the workpiece hole. The grip member 6 is lowered by a small distance integrally against the urging force of the disc spring 25 and is clamped. Therefore, the clamping force input from the hydraulic cylinder to the clamp rod 11 and the grip member 6 is reduced by the biasing force of the disc spring 25.

Japanese Patent Laid-Open No. 10-58254 German Patent No. 4020981

  In the tilt table device, when the hydraulic clamp device is provided on the tilt table, a rotary joint for connecting a plurality of hydraulic passages to the shaft support mechanism must be provided as in the tilt table device of Patent Document 1. On the tilt table side as well, a plurality of systems of hydraulic passages are formed by hydraulic pipes and hydraulic hoses, so that the manufacturing cost of the tilt table device becomes remarkably high and the tilt table device becomes large.

  In addition, since the plurality of rotary seals incorporated in the rotary joint is easily worn and lacks durability, the replacement work of the rotary seals frequently occurs. At this time, since the rotary joint must be disassembled, the maintenance takes a lot of labor and cost. Further, it is difficult to extend the life of the tilt table device because the life of the rotary joint becomes a bottleneck.

  In addition, since the frictional resistance of the rotary seal is large, the resistance to swing or rotate the tilt table is increased by a plurality of rotary seals, which is not only disadvantageous for energy saving, but also when hydraulic pressure leaks from the hydraulic passage. Clamping force is reduced, causing trouble.

  An object of the present invention is to provide a tilt table device in which a rotary joint can be omitted by mounting a spring type clamp device on a tilt table, and a clamp state by a clamp switching means provided on a stationary side. To provide a tilt table device that can be switched over in an unclamped state.

  The tilt table device according to claim 1 includes a tilt table supported by a pair of shaft support mechanisms so as to be swingable or rotatable eccentrically or concentrically with respect to their rotation axes, and a pair of shaft support mechanisms. In the tilt table device having at least one of the rotational drive means, one or more spring type clamp devices capable of clamping a work set on the tilt table by the elastic force of a spring are provided on the tilt table, and the tilt table is provided. Clamp switching means is provided outside the tilt table so that the one or more clamping devices can be switched between a clamped state and an unclamped state when the table is at the workpiece replacement position.

  The tilt table device according to claim 2 is a pair of eccentric support members respectively connected to the shaft members of the pair of shaft support mechanisms according to the invention of claim 1, wherein both ends of the tilt table can be disconnected. A pair of eccentric support members connected to each other is provided.

  According to a third aspect of the present invention, there is provided the tilt table device according to the first or second aspect, wherein the clamp device includes a clamp body, a grip member that extends through the top of the clamp body and extends outside and has a diameter that can be enlarged or reduced. A clamp rod having a tapered shaft portion engaged with the inside of the grip member, a support mechanism for supporting the grip member from below by the elastic force of the first spring, and a clamp rod downward by the elastic force of the second spring A clamp spring cylinder is provided which is driven to increase the diameter of the grip member and is driven to the clamp side.

  A tilt table device according to a fourth aspect of the present invention is the invention according to the third aspect, wherein the clamp spring cylinder has a piston member having a protruding rod portion that protrudes downward from a lower end of the clamp body at least in a clamped state. The switching means is characterized by switching the clamp device to the unclamped state by pushing the protruding rod portion upward, and switching to the clamped state by releasing the force to push the protruding rod portion.

  According to the first aspect of the present invention, since the tilt table is provided with one or a plurality of spring-type clamping devices capable of clamping the work set on the tilt table with the elastic force of the spring, the tilt table is provided with hydraulic pressure, pressurized air, or the like. The workpiece can be clamped to the tilt table by one or a plurality of spring-type clamping devices without using fluid pressure.

  Since there is no need to supply fluid pressure to the tilt table, there is no need to provide a rotary joint for supplying fluid pressures of a plurality of systems to the shaft support mechanism. Therefore, the manufacturing cost of the tilt table device can be reduced, and by omitting the rotary joint and its rotary seal, the durability of the tilt table device can be greatly improved and the maintenance cost can be reduced. Moreover, since friction caused by a plurality of rotary seals of the rotary joint can be eliminated, not only is it advantageous for energy saving, but also no trouble is caused because no hydraulic leak occurs from the hydraulic passage.

  In addition, since the clamp table is provided outside the tilt table so that the one or more clamping devices can be switched between the clamped state and the unclamped state when the tilt table is at the workpiece replacement position, Switching between the clamped state and the unclamped state of the equipped one or more spring-type clamp devices can be performed freely.

According to the second aspect of the present invention, both ends of the tilt table can be eccentrically supported by the pair of shaft support mechanisms via the pair of eccentric support members.
According to the invention of claim 3, the clamp device is configured to clamp the grip member by gripping the grip member in the hole of the workpiece by the clamp rod biased by the elastic force of the second spring, and clamp from the lower surface side of the workpiece. Therefore, the space occupied by the clamp device on the tilt table can be made very small, which is advantageous in terms of space saving.

  According to the invention of claim 4, the clamp switching means can be constituted by a hydraulic cylinder or an air cylinder having a simple structure. Therefore, the structure of the clamp switching means is simple and can be manufactured at low cost.

It is a front view of the tilt table apparatus of Example 1 of this invention. It is sectional drawing of a spring type clamp apparatus (unclamped state). It is a front view of the tilt table apparatus of Example 2. It is a front view of the tilt table apparatus of Example 3. It is sectional drawing of the fluid pressure drive type clamp apparatus which concerns on a prior art.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

  The present invention relates to a tilt table device for setting a workpiece for machining. As shown in FIG. 1, the tilt table device 1 swings or rotates along a pair of shaft support mechanisms 2 and 3 and a locus eccentric to the rotation axis by the shaft support mechanisms 2 and 3. The tilt table 4 supported in a possible manner, the rotation driving means 5 provided in at least one of the pair of shaft support mechanisms 2 and 3 (the right side shaft support mechanism 3 in FIG. 1), and the tilt table 4 are provided. It has a pair of spring-type clamp devices 6 and clamp switching means 8 provided on the floor 7 side facing the tilt table 4.

  The left shaft support mechanism 2 in FIG. 1 includes a case member 20, a horizontal shaft member 21 rotatably supported by the case member 20 via a bearing, and a rotating member connected to the right end of the shaft member 21. 22. An L-shaped eccentric support member 23 is fixed to the right end portion of the rotating member 22 in a front view shown in FIG. The eccentric support member 23 is formed integrally with a standing upright plate portion 23a and a support plate portion 23b extending rightward from the lower end of the upright plate portion 23a.

The right shaft support mechanism 3 in FIG. 1 includes a case member 30, a horizontal shaft member 31 that is rotatably supported by the case member 30 via a bearing, and a rotating member that is coupled to the left end of the shaft member 31. 32, and an electric motor 5 that rotates the shaft member 31 (this corresponds to the rotation driving means) and an encoder (not shown) that detects the rotation angle of the electric motor 5.
The electric motor 5 is electrically connected to the control unit 10 and driven and controlled by the control unit 10, and an encoder detection signal is also supplied to the control unit 10. An L-shaped eccentric support member 33 is fixed to the inner end portion of the shaft member 31 in a front view shown in FIG. The eccentric support member 33 is formed integrally with a standing upright plate portion 33a and a support plate portion 33b extending leftward from the lower end of the upright plate portion 33a.

  The pair of eccentric support members 23, 33 have a symmetrical shape, and the tilt table 4 is mounted on the pair of support plate portions 23 b, 33 b of the pair of eccentric support members 23, 33. The left end of the tilt table 4 is placed on the left support plate 23b and fixed with a plurality of bolts, and the right end of the tilt table 4 is placed on the right support plate 33b and fixed with a plurality of bolts. ing. In this manner, the tilt table 4 is detachably fixed to the pair of eccentric support members 23 and 33, and in the state shown in FIG. 1, the pair of support plate portions 23b and 33b are horizontally positioned at the lowest position. The tilt table 4 is positioned in the horizontal position at the lowest position, and the tilt table 4 is decentered from the axis of the shaft members 21 and 31 by a predetermined distance. The control unit 10 controls the electric motor 5 based on the detection signal from the encoder, thereby controlling the rotation angle of the index rotation of the pair of eccentric support members 23 and 33.

The tilt table 4 is composed of a thick plate member having a predetermined rectangular shape that is elongated in the left-right direction in plan view. In the vicinity of the four corners of the tilt table 4, mounting tables 41 for mounting the workpiece W are provided.
A spring-type clamp device 6 that can be clamped by the elastic force of the spring is attached in a penetrating manner to the left and right portions of the tilt table 4 in the center of the tilt table 4 in the width direction perpendicular to the plane of FIG. The workpiece W is fixed to the mounting table 41 of the tilt table 4 by clamping a pair of holes H formed in the bottom of the workpiece W by these clamping devices 6.

  As shown in FIG. 2, the spring clamp device 6 includes a clamp body 60, a grip member 63, a clamp rod 64, a support mechanism 65 that supports the grip member 63 from below, and a clamp spring cylinder 66. The clamp body 60 includes an upper body 61 and a lower body 62 having an upper end engaged with the lower end of the upper body 61. The upper body 61 is fixed to the lower body 62 by a plurality of bolts (not shown).

  The upper main body 61 includes a flange portion 61a and a main body cylinder portion 61b that rises from the center portion of the flange portion 61a. The upper main body 61 is mounted on the tilt table 4 with the upper half of the main body cylinder portion 61b protruding on the tilt table 4, and the other portions are fitted inside the tilt table 4, and the lower main body 62 is Projecting to the lower side of the tilt table 4. The flange portion 61 a of the upper body 61 is fixed to the tilt table 4 by a plurality of bolts 42 inserted from above. A seating surface on which the workpiece W is seated may be formed at the upper end of the main body cylinder portion 61b.

  The grip member 63 extends through the insertion hole at the top of the main body cylinder portion 61 b of the clamp body 60. The grip member 63 is configured so that the diameter can be enlarged and reduced by four divided grip bodies divided into four equal parts in the circumferential direction. A grip claw portion 63 a having three steps of teeth is formed on the upper half of the grip member 63, and a proximal end collar portion 63 b is formed on the lower end portion of the grip member 63. On the inner surface of the grip claw portion 63a of the grip member 63, a tapered surface 63c having a larger diameter toward the upper side is formed.

  An annular scraper 67 made of an elastic synthetic resin material that closes the gap on the outer peripheral side of the grip member 63 is mounted in the insertion hole at the top of the main body cylinder portion 61 b, and the grip member 63 is disposed below the scraper 67. Is equipped with an O-ring 68 for bundling the split grip bodies. The proximal end flange portion 63b of the grip member 63 is accommodated in the accommodation hole 69 of the main body cylinder portion 61b so as to be movable in the radial direction, and is supported from below by the upper end plate 72 of the support member 70 of the support mechanism 65, and in the horizontal direction. It is movable. Therefore, the grip member 63 is movable in the horizontal direction in FIG. 2 with respect to the main body cylinder portion 61b through elastic deformation of the scraper 67, but the axis of the grip member 63 is aligned with the axis of the main body cylinder portion 61b. It is centered by a scraper 67 so as to match.

  The clamp rod 64 is disposed so as to pass through the grip member 63. The clamp rod 64 includes a taper shaft portion 64a engaged with the inside of the grip claw portion 63a and a rod portion 64b connected to the lower end of the taper shaft portion 64a. And a T-shaped engaging portion 64c including a lower portion of the rod portion 64b.

  The support mechanism 65 supports the grip member 63 from below by the elastic force of the first spring 73, thereby enabling the diameter of the grip member 63 to be increased during clamping. The support mechanism 65 includes the support member 70, a flanged cylinder member 74 that supports the lower end portion of the support member 70, and a spring receiver that supports the flange portion 74 a at the lower end portion of the flanged cylinder member 74 from below. A member 75 and a first spring 73 formed of a pressure coil spring that applies an upward biasing force to the lower end of the spring receiving member 75 are provided.

  A flange 74a at the lower end of the flanged cylinder member 74 is mounted in a circular accommodation hole 76 formed by the upper main body 61 and the lower main body 62 so as to be movable a small distance in the vertical direction. The spring receiving member 75 is slidably inserted into the insertion hole 77 at the upper end portion of the lower body 62, and the locking portion 75 a at the lower end portion of the spring receiving member 75 is not on the upper end wall of the locking hole 78 of the lower body 62. Facing in contact. In the state shown in FIG. 2, the grip member 63 holds the upper limit position and the clamp rod 64 also holds the upper limit position by the support mechanism 65, and the spring clamp device 6 is in an unclamped state.

  The clamp spring cylinder 66 drives the clamp rod 64 downward by the elastic force of the second spring 80 to increase the diameter of the grip member 63 and drive it to the clamp side. The clamping spring cylinder 66 includes a cylinder hole 81 formed in the lower main body 62, a proximal cylinder hole 81a formed slightly larger in diameter than the cylinder hole 81, a piston member 82, and the piston member 82 downward. And a second spring 80 for biasing.

The piston member 82 protrudes downward from the lower end of the lower body 62 at least in a clamped state, a piston portion 82a movably mounted in the base end cylinder hole 81a, a piston rod 82b extending upward from the piston portion 82a. And a protruding rod portion 82c.
A screw shaft 82d is formed at the upper end portion of the piston rod 82, and a cylindrical member 83 that forms a T-shaped engagement groove 83a in cooperation with the screw shaft 82d is screwed to the screw shaft 82d. A T-shaped engaging portion 64c of the clamp rod 64 is inserted and engaged with the shaped engaging groove 83a from the lateral direction. The piston member 82 and the clamp rod 64 can be moved up and down integrally.

  The first spring 73 is externally compressed on the piston rod 82 b between the piston portion 82 a and the spring receiving member 75, and elastically biases the spring receiving member 75 upward with respect to the piston member 82, thereby supporting the support mechanism 65. It is elastically biased upward. The spring force of the second spring for clamping 80 is much stronger than the spring force of the first spring 73 for support. In the present embodiment, the second spring 80 is constituted by a single compressed coil spring, but may be constituted by a plurality of compressed coil springs or a plurality of disc springs.

  The clamp switching means 8 is provided on the floor 7 side facing the tilt table 4 when the tilt table 4 is at the lowest position. The clamp switching means 8 can switch the pair of clamp devices 6 between a clamped state and an unclamped state. The clamp switching means 8 includes a pair of hydraulic cylinders 86 arranged on the floor surface 7 side corresponding to the pair of clamping devices 6, and a hydraulic pressure supply source 87 for supplying hydraulic pressure to these hydraulic cylinders 86. 86 and the hydraulic pressure supply source 87 are controlled by the control unit 10.

  The hydraulic cylinder 86 is a single-acting hydraulic cylinder, and the piston member (not shown) and the piston rod 86a are driven upward by hydraulic pressure, and the piston member and the piston rod 86a are driven downward by a return spring. The hydraulic cylinder 86 pushes the protruding rod portion 82c of the piston member 82 of the spring cylinder 66 upward, thereby switching the clamp device 6 to the unclamped state and releasing the force that pushes the protruding rod portion 82c. Switch the device 6 to the clamped state.

Next, operations and effects of the tilt table device 1 will be described.
When the work W is set and fixed on the tilt table 4, as shown in FIG. 1, the tilt table 4 is stopped at the lowest position, and a pair of hydraulic cylinders corresponding to the pair of clamping devices 6. The 86 piston members are driven to move upward to hold the clamp device 6 in an unclamped state. At this time, the piston rod 86a of the pair of hydraulic cylinders 86 is extended, and the state in which the protruding rod portion 82c of the clamping device 6 is pushed upward by a small distance by the hydraulic cylinder 86 is maintained. Is held in an unclamped state.

  Next, the workpiece W is carried onto the tilt table 4 and placed on the four mounting tables 41, and the upper ends of the grip member 63 and the clamp rod 64 of the pair of clamping devices 6 are placed in the holes H of the workpiece W. insert. Next, the piston members of the pair of hydraulic cylinders 86 are driven downward to release the force that pushes the protruding rod portion 82c of the clamp device 6, and the downward movement of the protruding rod portion 82c is allowed.

  Then, in the clamp device 6, when the clamp rod 64 is lowered by a small distance by the elastic force of the second spring 80 in the state where the grip member 63 is first supported by the support mechanism 65, the clamp rod 64 is moved with respect to the grip member 63. Is relatively moved downward, the grip claw 63a of the grip member 63 is driven to expand toward the diameter expansion side by the taper shaft portion 64a of the clamp rod 64, and the grip claw 63a of the grip member 63 becomes the hole of the workpiece W. Then, the grip member 63 and the clamp rod 64 are driven down by a small distance by the strong elastic force of the second spring 80, and the workpiece W is clamped in a seated state on the mounting table 41.

  In this clamped state, the first spring 73 initially operates to support the grip member 63, but after the grip member 63 is expanded, the elastic force of the first spring 73 is an internal force with respect to the piston member 82. Therefore, the clamping force is not reduced by the elastic force of the spring 73 of the support mechanism 65, and all the elastic force of the spring 80 can be used as the clamping force.

This tilt table device 1 has the following effects.
Since the pair of spring type clamp devices 6 capable of clamping the workpiece W set on the tilt table 4 with the elastic force of the second spring 80 is provided on the tilt table 4, fluid pressure such as hydraulic pressure or pressurized air is applied to the tilt table 4. The workpiece W can be clamped to the tilt table 4 by the pair of spring-type clamping devices 6 without using the.

  Since it is not necessary to supply fluid pressure to the tilt table 4, it is not necessary to provide rotary joints for supplying fluid pressures of a plurality of systems to the shaft support mechanisms 2 and 3. Therefore, the manufacturing cost of the tilt table device 1 can be reduced, and the durability of the tilt table device 1 can be significantly improved and the maintenance cost can be reduced by omitting the rotary joint and its rotary seal. Moreover, since friction caused by a plurality of rotary seals of the rotary joint can be eliminated, not only is it advantageous for energy saving, but also no trouble is caused because no hydraulic leak occurs from the hydraulic passage.

  Moreover, a clamp switching means 8 capable of switching the pair of clamping devices between a clamped state and an unclamped state is provided on the floor surface 7 side facing the tilt table 4 when the tilt table 4 is at the lowest position. Therefore, it is possible to freely switch between the clamped state and the unclamped state of the pair of spring clamp devices 6 provided on the tilt table 4. Then, both ends of the tilt table 4 can be eccentrically supported by the pair of shaft support mechanisms 2 and 3 via the pair of eccentric support members 23 and 33.

  The clamp device 6 is configured to clamp the grip member 63 to the inner peripheral surface of the hole H of the workpiece W by the clamp rod 64 biased by the elastic force of the second spring 80. Therefore, the space occupied by the clamping device 6 on the tilt table 4 can be made very small, which is advantageous in terms of space saving. Since the clamp switching means 8 can be constituted by a hydraulic cylinder 86 or an air cylinder having a simple structure, the structure of the clamp switching means 8 is simple and can be manufactured at low cost.

A tilt table apparatus 1A according to the second embodiment will be described with reference to FIG.
However, the same components as those of the tilt table device 1 are denoted by the same reference numerals, and the description thereof is omitted. Only different configurations will be described. The hydraulic pressure supply source 87 and the control unit 10 are not shown. The upper body 61 of the clamp device 6 is mounted on the tilt table 4 and the lower body 62 is fitted in the tilt table 4. However, the protruding rod portion 82 c of the piston member 82 of the clamping device 6 can protrude from the lower surface of the tilt table 4. The pair of hydraulic cylinders 86A constituting the clamp switching means 8A is the same as the hydraulic cylinder 86, but the length of the piston rod is long.

A tilt table apparatus 1B according to the second embodiment will be described with reference to FIG.
However, the same components as those of the tilt table device 1 are denoted by the same reference numerals, and the description thereof is omitted. Only different configurations will be described. The hydraulic pressure supply source 87 and the control unit 10 are not shown. The upper body 61 of the clamp device 6 is mounted on the tilt table 4 and the lower body 62 is fitted in the tilt table 4. However, the protruding rod portion 82 c of the piston member 82 of the clamping device 6 can protrude from the lower surface of the tilt table 4. The clamp switching means 8B is composed of one hydraulic cylinder 86B and a horizontal square bar member 87 connected to the upper end of the piston rod 86c of the hydraulic cylinder 86B, and a pair of clamps at both ends of the square bar member 87. The protruding rod portion 82c of the piston member 82 of the device 6 can be operated to switch between a clamped state and an unclamped state. In the case of this configuration, the number of hydraulic cylinders 86B can be reduced.

Next, an example in which the above embodiment is partially changed will be described.
(1) The number of the clamping devices 6 is not limited to two, and a necessary number of clamping devices can be provided according to the shape and size of the workpiece.
(2) The spring clamp device 6 is only an example. Various spring-type clamping devices that press and clamp the side or upper surface of the workpiece other than the workpiece hole can also be employed.
(3) The clamp switching means may be composed of an air cylinder, an electric motor, a cam mechanism, etc. in addition to the hydraulic cylinder.

(4) A tilt table in which the eccentric support members 23, 33 in the tilt table devices 1, 1A, 1B are omitted and the tilt table 4 is supported by the shaft members 21, 31 so as to rotate concentrically with the shaft members 21, 31. The present invention can be similarly applied to an apparatus.
(5) It is possible to apply the clamp device 6 to a device other than the tilt table device. In this case, a closing member for closing the lower end of the lower body 62 is provided, and an unclamping fluid pressure chamber is provided below the piston portion 82a. The unclamping operation may be performed by the fluid pressure supplied to the unclamping fluid pressure chamber.
(6) In addition, the present invention can be implemented in a form in which various modifications are added to the above-described embodiments without departing from the gist of the present invention.

  The present invention provides a tilt table device for machining a workpiece while fixing the workpiece on a tilt table eccentrically supported by a pair of shaft support mechanisms and performing indexing swinging and indexing rotation of the tilt table.

1, 1A, 1B Tilt table device 2, 3 Axis support mechanism 4 Tilt table 5 Rotation drive means 6 Spring clamp device 8, 8A, 8B Clamp switching means 23, 33 Eccentric support member 60 Clamp body 63 Grip member 64 Clamp rod 65 Support mechanism 66 Clamp spring cylinder 73 First spring 80 Second spring 82 Piston member 82c Protruding rod portions 86, 86A, 86B Hydraulic cylinder

Claims (4)

A tilt table supported by a pair of shaft support mechanisms so as to be swingable or rotatable eccentrically or concentrically with respect to their rotational axes, and a rotation drive means mounted on at least one of the pair of shaft support mechanisms In a tilt table device having
The tilt table is provided with one or a plurality of spring-type clamping devices capable of clamping the workpiece set on the tilt table by the elastic force of the spring,
Clamp switching means capable of switching the one or more clamping devices between a clamped state and an unclamped state when the tilt table is at a workpiece replacement position is provided outside the tilt table. Tilt table device.   A pair of eccentric support members respectively connected to the shaft members of the pair of shaft support mechanisms, wherein a pair of eccentric support members are provided to which both ends of the tilt table are releasably connected. The tilt table device according to claim 1.   The clamp apparatus includes a clamp body, a grip member that extends through the top of the clamp body and extends to the outside, and a diameter that can be enlarged and reduced, and a clamp rod that has a tapered shaft portion that is engaged inside the grip member. And a support mechanism that supports the grip member from below with the elastic force of the first spring, and a clamp rod that drives the clamp rod downward with the elastic force of the second spring to increase the diameter of the grip member and drive it toward the clamp side. The tilt table device according to claim 1, further comprising a spring cylinder.   The clamp spring cylinder has a piston member having a protruding rod portion protruding downward from the lower end of the clamp body at least in a clamped state, and the clamp switching means pushes the protruding rod portion upward, 4. The tilt table device according to claim 3, wherein the clamp device is switched to an unclamped state and switched to a clamped state by releasing a force that pushes the protruding rod portion.

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