JP2000280131A - Work carrying-in/out apparatus for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work carrying-in/out device for machine tool capable of increasing the reliability of durability of a power supplying passage to a fore/aft traveling actuator activating a fore/aft moving frame. SOLUTION: A lifting-up/down frame 25 is mounted on the upper part of a swiveling table 21 so as to lift up/down by the rod 29 of a lifting-up/down cylinder 28. A pair of work supporting rails 35, 36 are mounted on the lifting-up/ down frame 25 through a fore/aft moving rod 31 and a fore/aft moving block 32. A fore/aft moving cylinder 41 is mounted on the top of the swiveling table 21, and a guide rod 43 which extends vertically is connected to the front end of the rod 42 and inserted into a guide hole 32a formed in the fore/aft moving block 32. When the moving up/down frame 25 moves up and down, the fore/aft moving block 32 is permitted to move up and down, and the fore/aft moving block 32 is reciprocated in a fore/aft direction with the work supporting rails 35, 36 by the cross slide cylinder 41. A hydraulic pipe for the cross slide cylinder 41 is unflexibly installed on the swiveling table 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work loading / unloading device for a machine tool.

[0002]

2. Description of the Related Art The following two devices have been proposed as work loading / unloading devices in conventional machine tools.

The first carrying-in / out device mounts a turning table on a mounting base supported by a base via a bearing, and mounts an elevating frame on the turning table via an elevating guide mechanism so as to be able to move up and down. An elevating cylinder for elevating the elevating frame is mounted on the swivel table. A forward / backward moving frame for supporting a workpiece is mounted on the lifting frame via a forward / backward moving guide mechanism by a forward / backward moving cylinder. A longitudinal movement cylinder is attached to the longitudinal movement frame, and the lifting frame, the longitudinal movement frame and the longitudinal movement cylinder are integrally moved forward and backward. Then, the workpiece is reciprocated between a position for transferring the work supported on the conveyor by moving the frame back and forth and moving forward and backward, and a clamp position of the work mounted on the rotating table by the clamp mechanism. The turning table is turned in the clamped state, and the work is processed by the processing tool supported on the spindle.

In the second work loading / unloading device, a turning table is mounted on a mounting base supported by a base via a bearing, while a base frame is fixed to the mounting base. An elevating frame is mounted so as to be able to elevate and lower via an elevating guide mechanism, and an elevating cylinder for mounting and lowering the elevating frame is mounted on the base frame. Further, a longitudinal frame for supporting a work is mounted on the elevating frame via a longitudinal movement guide mechanism so as to be capable of longitudinal movement, and a hydraulic cylinder for longitudinal movement is mounted on the longitudinal frame. The two ports and the pressure oil supply source are connected by two hydraulic pipes that can be deformed in the up-down direction and the front-back direction. Then, the workpiece is reciprocated between a position for transferring the work supported on the conveyor by moving the frame back and forth and moving forward and backward, and a clamp position of the work mounted on the rotating table by the clamp mechanism. The turning table is turned in the clamped state, and the work is processed by the processing tool supported on the spindle.

[0005]

In the first and second work loading / unloading devices, the forward / backward moving hydraulic cylinder is moved up and down by the lifting / lowering cylinder, and is reciprocated in the forward / backward direction integrally with the forward / backward moving frame. Is done. For this reason,
It is necessary to make the piping to the hydraulic cylinder for longitudinal movement long and flexible so as to allow the vertical movement and the reciprocating movement in the longitudinal direction. For this reason, there was a problem that the durability reliability of the hydraulic piping was reduced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and improve the durability of a power supply path to a longitudinal actuator for operating a longitudinal frame by improving the durability of a workpiece in a machine tool. An object is to provide a carry-in / out device.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, an elevating frame is attached to a base frame via an elevating guide mechanism so as to be able to move up and down, and the base frame is attached to the base frame. An elevating actuator for elevating the elevating frame is mounted on the elevating frame, and a fore-and-aft frame for supporting a work is mounted on the elevating frame via a fore-and-aft movement guide mechanism so as to be able to move forward and backward by the fore-and-aft actuator. In a workpiece loading / unloading device for a machine tool, the workpiece is reciprocated between a loading / unloading position by moving a frame up and down and a back-and-forth operation, and a clamp position of a workpiece clamping mechanism. And the front and rear movement frame of the front and rear movement rod of the front and rear movement actuator. The lifting allowable mechanism front Kodo frame is allowed to move up and down in synchronism with the lifting frame provided,
A power supply path to the longitudinal movement actuator is provided on the base frame in an unflexible manner.

According to the invention described in claim 2, in claim 1, the lifting / lowering permitting mechanism includes a guide rod connected to a longitudinal rod of the longitudinal actuator so as to be orthogonal to a center axis of the rod. It is constituted by penetrating the formed guide hole.

According to a third aspect of the present invention, in the first or second aspect, the actuator for raising and lowering and the actuator for moving back and forth are hydraulic cylinders, and the base frame is reciprocated within a predetermined angle range by a pair of bearings. A rotary joint for guiding fluid pressure from a fluid pressure supply source to the forward / backward moving fluid pressure cylinder; The input / output ports on the turning table side of the joint, and the input / output ports of the lifting / lowering hydraulic cylinder and the forward / backward moving hydraulic cylinder are:
It is connected by at least one of a fluid passage formed in the swivel table itself or an external pipe fixedly attached to the swivel table.

According to a fourth aspect of the present invention, in the third aspect, the turning table is provided with a positioning mechanism for receiving and positioning and supporting the work supported by the longitudinal frame when the lifting frame is moved down. And a clamp mechanism for clamping the work supported by the positioning mechanism is mounted, and an input / output port of a clamping fluid pressure cylinder constituting the clamp mechanism and an input / output port of the rotary joint on the turning table side are They are connected by at least one of a fluid passage or an external pipe provided in the turning table.

According to a fifth aspect of the present invention, in the fourth aspect, the turning table and the front and rear moving frame are held in a horizontal state, and the front and rear moving frame is held at the lowest position together with the elevating frame. The table, the lifting frame, and the front-back movement frame are configured to perform the following operations.

An operation of raising the lifting frame and the front-back moving frame from the lowermost position to the uppermost position by the lifting hydraulic cylinder; After the above operation, an operation of receiving the work by moving the elevating frame and the forward / backward moving frame from the uppermost position to the work transfer position.

An operation of retracting the longitudinal frame, which has received the work, to the uppermost position. -After the above operation, an operation of lowering the retracted longitudinal frame to the lowest position and transferring the work to the positioning mechanism.

After the above operation, an operation of clamping the work by the clamp mechanism. -After the above operation, the operation of rotating the turning table, the elevating frame, and the front-rear moving frame by a predetermined angle about the support shaft to move the work to the processing position.

According to the present invention, the elevating frame is mounted on the base frame via the elevating guide mechanism so as to be able to move up and down, and the elevating actuator for moving the elevating frame up and down is mounted on the base frame. A vertically movable frame for supporting a workpiece is mounted on the vertically movable frame via a forward and backward movement guide mechanism so as to be movable forward and backward. The actuator for forward and backward movement is mounted on the vertically movable frame, and the vertically movable frame is moved vertically and vertically. The work is reciprocated between the carry-in / out position and the clamp position of the work by the clamp mechanism of the work, and a power supply path to the actuator for forward / backward movement is unflexibly provided in the lift frame and the lift guide mechanism. ing.

According to a seventh aspect of the present invention, in the sixth aspect, the elevating actuator and the back-and-forth moving actuator are hydraulic cylinders, the elevating guide mechanism is connected to the elevating frame, and a pair of left and right base frames is provided. The guide hole is constituted by a pair of elevating rods penetrated in the up and down direction, and the supply path of the fluid pressure to the forward / backward moving hydraulic cylinder attached to the elevating frame passes through the insides of the two elevating rods, respectively. A pair of fluid passages formed, and a pair of fluid passages formed in the elevating frame and connected to the two fluid passages, respectively, and one of the fluid passages on the elevating frame side is a fluid for longitudinal movement. The piping is connected to the forward port of the pressure cylinder via piping, and the other fluid passage is connected to the reverse port of the forward / backward moving hydraulic cylinder. It has been continued.

According to an eighth aspect of the present invention, in the sixth or seventh aspect, the elevating frame and the front-rear moving frame are always kept in a horizontal state, and a turning table is mounted above the front-rear moving frame. A positioning mechanism for positioning the work and a clamp mechanism for clamping the work are mounted on the table, and the elevating frame, the back-and-forth moving frame, and the turning table are configured to perform the following operations.

The operation of raising the lifting frame and the front-back movement frame from the lowermost position to the intermediate height position corresponding to the work transfer position by the front-rear movement fluid pressure cylinder. After the above operation, an operation of receiving the work by advancing the elevating frame and the front-back movement frame to the work transfer position by the front-rear movement fluid pressure cylinder.

After the above operation, an operation of retracting the longitudinal frame which has received the work to the intermediate height position. After the above operation, an operation of moving the retracted elevating frame and the back-and-forth moving frame to the uppermost position and positioning the work by the positioning mechanism on the turning table side.

After the above operation, an operation of clamping the work by the clamp mechanism on the turning table side. -After the above operation, an operation of moving the lifting frame and the front-back movement frame to the lowermost position.

After the above operation, an operation of turning the turning frame to the work processing position of the work.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described.
An embodiment will be described with reference to FIGS. As shown in FIGS. 2 and 3, a mounting table 12 is fixedly provided on the upper surface of the base 11, and a work gripping mechanism 15 is mounted on upper right and left sides of the mounting table 12 via bearings 13 and 14. The work gripping mechanism 15 is reciprocated in a predetermined angle range by a swing motor 16 provided corresponding to the right bearing 14.

A turning table 21 constituting the work gripping mechanism 15 is pivotally attached to the bearings 13 and 14 via a pair of left and right support shafts 22 and 23. As shown in FIG. 1, an elevating frame 25 having a horizontally long rectangular column shape is mounted above the turning table 21.
5 has a pair of lifting guide rods 26
Are fixed to project downward. The two lifting guide rods 2
Elevating guide tubes 27, 27 for guiding the guides 6, 26 are inserted and fixed to the swivel table 21 in the vertical direction.
An elevating cylinder (actuator) 28 is fixed to the lower surface of the central portion of the turning table 21, and a rod 29 protrudes from the upper surface of the turning table 21 and is connected to the lower surface of the elevating frame 25.

Accordingly, when the lifting cylinder 28 is operated and its rod 29 is raised and lowered, the lifting frame 2
5 is moved up and down by the guide action of the elevating guide rods 26, 26 in a horizontal state.

At the left and right sides of the elevating frame 25, horizontal cylindrical front and rear guide tubes 30, 30 are inserted and fixed, and the front and rear guide rods 30, 31 can reciprocate in the front and rear directions. Is supported through. A forward / backward moving block 32 is attached to a small diameter portion formed at the front end of each of the forward / backward moving rods 31, 31 so as not to be separated by a stop ring 33. The front-back movement block 32
A pair of left and right work support rails 35 and 36 are connected to both left and right end portions via brackets 34 and 34, respectively. On the upper surfaces near the front ends of these work support rails 35, 36, step portions 3 for confirming whether or not the work W is supported.
5a and 36a are formed, and clamp mechanisms 58 to
Notch portions 35b and 36b are formed to avoid interference with the clamp lever 63 of 60.

A mounting groove 21a is formed in the center of the upper surface of the turning table 21 in the front-rear direction, and a lower part of a cylinder (actuator) 41 for front-rear movement is fitted in the mounting groove 21a, and is turned by a bolt (not shown) or the like. It is fixed to the table 21. The rod 4 of the cylinder 41 for forward and backward movement
A vertical guide rod 43 is erected and fixed at the tip of 2, and the guide rod 43 is inserted into a guide hole 32 a vertically penetrating the center of the front-rear movement block 32.

In this embodiment, the forward and backward moving rods 31, 3
1, the front and rear movement frame 37 by the front and rear movement block 32, the brackets 34 and 34, the work support rails 35 and 36, and the like.
Is configured. A vertical guide rod 43 connected to the distal end of the horizontal rod 42 and a guide hole 32a provided in the front / rear movement block 32 constitute a lifting / lowering operation permitting mechanism 44 for allowing the front / rear movement frame 37 to move up and down.

On the upper surface of the turning table 21, there is provided a positioning mechanism 50 for positioning and supporting the work W supported by the work support rails 35 and 36 at a predetermined position. The positioning mechanism 50 includes first to third work support bases 51, 52, 53, and also includes first and second work position regulating cylinders 54, 55. The first to third work supports 51 to 53 are provided.
The position of the work W supported on the upper edge of the first and second regulating cylinders 54 and 55 is regulated by the rods 55 and 56.

First to third work clamp mechanisms 58, 59, and 60 are mounted on the left and right upper portions of the turning table 21. Since each of the clamp mechanisms 58 to 60 has the same configuration, only one clamp mechanism will be described. The clamping cylinder 61 is fitted and fixed in an accommodation hole formed in the swivel table 21 in the vertical direction, and the base end of the clamp lever 63 is
4 are connected so as to be vertically rotatable. An upper end of a link 65 is connected to an intermediate portion of the clamp lever 63 by a pin 66, and a lower end of the link 65 is connected to a bracket 67 attached to an upper portion of the cylinder 61 by a pin 68. And the clamping cylinder 6
1 is operated, the clamp lever 63 is tilted up and down, and the work W supported by the work support table 51 is moved.
Is clamped.

Next, a description will be given of a hydraulic pressure supply path for supplying a hydraulic pressure to the above-described lifting / lowering cylinder 28, forward / backward movement cylinder 41, and clamping cylinder 61. As shown in FIG. 4, the bearing 13 is provided with a rotary joint 71 corresponding to the support shaft 22. A plurality of annular grooves 72a to 72f are formed on the inner peripheral surface of the cylindrical body 71A constituting the joint 71, and each of the annular grooves 72a to 72f is formed.
A pipe for supplying pressure oil from the oil tank 73 and the pump 74 and a drain pipe for releasing pressure are connected to f. Electromagnetic switching valves 75, 76, 77 are connected to the respective pipes. The support shaft 22 has oil passages 78a to 78f corresponding to the annular grooves 72a to 72f.
The oil passages 78a to 78f are connected to two ports of the lifting cylinder 28 via pipes 79a and 79b. The oil passages 78c and 78d are formed by oil passages 79c 'and 79d' formed in the swivel table 21 and pipes 79c and 79.
It is connected to two ports of the cylinder 41 for forward and backward movement via d.

As shown in FIGS. 2 and 3, a pair of left and right brackets 81, 81 are provided upright in front of the mounting base 12, and rollers 82, 82 are provided on upper ends of both brackets 81, 81. . As shown in FIG.
A work carry-in / out conveyer 83 is provided on a side of the work 2.

When the work supporting rails 35, 36 are advanced, the rollers 82, 82 support the lower surfaces thereof,
The load of the work W placed on both work support rails 35 and 36 is shared.

As shown in FIG. 3, a spindle 84 of a machine tool is mounted above the swivel table 21, and the work W is processed by a processing tool 85 mounted on the tip of the spindle 84.

Next, the operation of the work loading / unloading device in the machine tool configured as described above will be described.
FIGS. 2 to 4 and FIG. 6A show that the lifting frame 25 and the work support rails 35 and 36 are stopped at the lowest position, that is, the standby position, and the clamp lever 63 of the first to third clamp mechanisms 58 to 60 is The state where it is held at the non-clamp position is shown. In this state, when a processing operation signal of the work is output from a control device (not shown), the lifting cylinder 2
8, the lifting frame 25 is raised by the action of the lifting guide rod 26 and the guide cylinder 27. Then, FIG.
As shown by the dashed line, the longitudinal movement rod 31, the longitudinal movement block 32, and the work support rails 35, 36 are raised. 6 and 7, only one of the work support rails 35 is shown.

After the work supporting rails 35 and 36 are stopped and moved to the highest positions, the forward / backward moving cylinder 41 is operated and its rods 42 and 43 are advanced.
As shown in (b), the longitudinal rod 31, the longitudinal block 32, and the work support rails 35 and 36 are integrally moved forward. In this state, the worker moves the work W on the work carry-in / out conveyor 83 to the upper surfaces of the work support rails 35 and 36. At this time, rail 35,
Since the work 36 has the step portions 35a and 36a, it is easy for the work W to be transferred onto the work support rails 35 and 36 by the work W being supported over the step portions 35a and 36. Is determined.

Next, when the rod 42 and the rod 43 are moved backward by operating the cylinder 41 for forward and backward movement, the work supporting rails 35 and 36 become the work W and the rod 3 for forward and backward movement.
1 and the back-and-forth movement block 32, and retreats as shown in FIG.
Is moved to the position indicated by. In this state, the elevating cylinder 28 is operated to move the elevating frame 25,
1, the front and rear movement block 32 and both work support rails 35,
7A, the work W is transferred to the first to third work supports 51 to 53, as shown in FIG. The work W is held in a state where it is displaced to an appropriate position by the rods 55, 57 of the first and second work position regulating cylinders 54, 56. With the lifting frame 25 and the work support rails 35 and 36 moved to the lowermost position (standby position), the first to third clamping cylinders 58 to 60 are operated to operate the clamp levers 63 to 6.
3, the upper surface of the work W is pressed.

Next, the motor 16 is operated to turn the turning table 2.
7 is rotated 90 degrees clockwise from the horizontal state around the support shafts 22 and 23, as shown in FIG.
Processing is performed by the processing tool 85 supported by the tool 4.

When the machining is completed, the turning table 21 is turned again by the motor 16 to the state shown in FIG.
Thereafter, the work W processed by performing the operation opposite to the clamping operation of the work W is transferred to the work loading / unloading conveyor 83.
Can be returned to the top.

Next, the effects of the work loading / unloading device configured as described above will be described. (1) In the above-described embodiment, a longitudinal movement cylinder 41 is mounted on the upper surface of the swivel table 21, and a vertically extending guide rod 43 is connected to the tip of the rod 42, and the guide rod 43 is formed on the longitudinal movement block 32. Guide hole 32
The following effects are achieved by providing a mechanism that allows the vertical movement block 32 to move up and down together with the work support rails 35 and 36 by inserting the work support rails 35 and 36 through the hole a. That is, the front-rear movement cylinder 4
The pressure oil supply path for the two ports (1) can be unflexibly mounted on the swivel table 21, and the durability of the pressure oil supply path can be improved.

(2) In the above embodiment, the turning table 2
The rotary joint 71 is attached to the bearing 13 that supports the first support shaft 22, and the pipes 79 a, 79 b, 79 c, and 79 are passed from the oil tank 73 through the rotary joint 71.
Pressure oil is supplied to the elevating cylinder 28, the forward / backward moving cylinder 41 and the clamping cylinder 61 without using a flexible piping system via the d and the oil passages 79c ', 79d', 79e, 79f. For this reason, the entire hydraulic supply path to each cylinder can be made unflexible, and the durability of the hydraulic supply path can be improved.

(3) In the above-described embodiment, the oil passage 79c '(79) is connected to the two ports of the longitudinal cylinder 41.
d ') is provided in the swivel table 21 by drilling, and an oil passage 79c' (79d ') is provided in the unflexible pipe 79.
c (79d) was mounted like a jumper wire. For this reason, compared to the configuration in which only the oil passage is formed in the swivel table 21, the oil passage 78c (7
8d) and both ports of the longitudinal cylinder 41 can be easily connected.

(4) In the above embodiment, since the step portions 35a, 36a are formed in a part of both the work support rails 35, 36, when the work W is put on the both support rails 35, 36, it is determined whether or not the work W is put on securely. Can be easily confirmed by the operator.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, members having the same configurations and functions as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the work loading / unloading device according to the second embodiment, the turning table 21 is mounted downward.
The lifting frame 25 and the work support rails 35 and 36 are located below the turning table 21.
And is mounted on the mounting base 12 side.

As shown in FIGS. 8 and 10, a base frame 91 is fixed to the mounting base 12, and guide holes 91a, 91a are formed at two places on the left and right sides of the base frame. Elevating guide rods 26, 26 fixed to the frame 25 side are penetrated so as to be slidable in the vertical direction. The elevating cylinder 28 has a base frame 91
The upper end of the rod 29 is connected to the lower surface of the elevating frame 25. An oil passage forming plate 92 is interposed between the upper end portions of the lift guide rods 26, 26 and the rod 29 and the lower surface of the lift frame 25. A forward / backward moving cylinder 41 is connected to the rear side surface of the elevating frame 25, and its rod 4
2 is connected to the front-rear movement block 32. Side plates 93, 93 are connected to both sides of the front-rear movement block 32,
Work support rails 35, 36 are connected to both side plates 93, 93 via brackets 94, 94. The rear ends of the pair of front / rear moving rods 31, 31 and the rear ends of the side plates 93, 93 are connected by connecting plates 95, 95. Members 96, 96 are attached.

Oil passages 26a, 26b are vertically penetrated through the pair of lifting guide rods 26, 26, and oil pipes Pa, Pb are connected to lower ends thereof.
As shown at 0, it is connected to the oil tank 73. The oil passage forming plate 92 and the oil passage 92
a, 92b, 25a, and 25b are formed, and pressure oil is supplied to one port of the longitudinal cylinder 41 through one of the oil passages 92a and 25a. Further, the other oil passages 92b and 25b are connected to the other port of the longitudinal cylinder 41 through an unflexible pipe 97,
Pressurized oil is supplied.

Next, the operation of the work loading / unloading device configured as described above will be described. FIG. 12A shows the lifting frame 25 and the work support rails 35 and 36.
Indicates the lowermost position, that is, the state where the robot is stopped at the standby position. In this state, when the lifting cylinder 28 is operated and the lifting frame 25 is raised, the support rails 35 and 36 are also raised, and as shown in FIG.
36 is moved to an intermediate height position where the workpiece W can be transferred.

In FIG. 12B, when the rod 42 is moved forward by operating the cylinder 41 for forward and backward movement, the block 32 for forward and backward movement, the rod 31 for forward and backward movement, the side plate 93 and both support rails 35 and 36, The frame 37 is moved forward and moved to the work W transfer position as shown in FIG. Here, when the work W is transferred onto the two support rails 35 and 36 by the operator, the forward / backward moving cylinder 41 is operated, and as shown in FIG. , 36) are retracted.

Next, in FIG. 13 (b), when the lifting / lowering cylinder 28 is operated and the lifting / lowering frame 25 is raised, as shown in FIG.
The work W is lifted by the (both support rails 35, 36), and the first to third work supports 5 on the turntable 21 side are lifted.
1 to 53, the first to third clamp mechanisms 58 to 53
The workpiece W is clamped by 60. Thereafter, when the lifting cylinder 28 is operated, as shown in FIG. 14B, the lifting frame 25 is lowered to the lowermost position together with the front-rear moving frame 37 (both the work support rails 35 and 36).

As shown in FIG. 14B, the turning table 21 is turned by the motor 16 so that the surface to be processed of the work W is in a vertical state, and the processing of the work is performed by the processing tool 85 supported by the spindle 84. Done.

After the processing of the work W is completed, the processed work W is moved to the work transport conveyor 83 by an operation reverse to the above-described operation. In the second embodiment,
Elevating guide rods 26 for guiding the elevating frame 25
Oil passages 26a and 26b are formed with respect to
5, a cylinder 41 for forward and backward movement is fixed, and a hydraulic pressure is supplied to a port of the cylinder 41 from the oil passages 26a, 26b, 92a, 92b, the pipe 97, and the like. For this reason, the pressure oil supply path to the forward / backward movement cylinder 41 may be made flexible by making the oil pipes Pa and Pb flexible in consideration of only the up / down operation of the up / down guide rods 26, 26, and the piping may be configured to allow the forward / backward movement. The arrangement of the oil pipes Pa and Pb can be easily performed as compared with the case where the oil pipes are made flexible.
The durability of the oil pipes Pa and Pb can be improved.

The above embodiment can be embodied with the following modifications. In the first embodiment, an oil passage may be formed in the swivel table 21 and the pipes 79c and 79d may be omitted. In this case, the number of parts can be reduced.

The guide rod 43 provided on the rod 42 of the forward / backward movement cylinder 41 may be configured as a pantograph type, and this may be used as a vertical movement permitting mechanism. The pipes 79a and 79b of the elevating cylinder 28 may be omitted, and an oil passage may be formed in the swivel table 21 instead. In this case, the number of parts can be reduced.

In the second embodiment, the oil passage 26
a and 26b are pipes, and the pipes are
26 may be attached in the up-down direction. In place of the hydraulic cylinder, an air cylinder, an actuator for raising and lowering using electric energy, and an actuator for moving back and forth can be used.

[0055]

Since the present invention is configured as described above, it has the following effects. According to the invention as set forth in any one of claims 1 to 5, the power supply path to the front-rear movement actuator can be provided in an unflexible manner, and the number of flexible operation paths is reduced to improve the durability of the power supply path. Can be improved.

According to the invention described in claim 2, according to claim 1
In addition to the effects described in (1), the configuration of the lifting / lowering permitting mechanism can be simplified. According to the invention as set forth in any one of claims 6 to 8, the power supply path to the actuator for longitudinal movement can be a flexible pipe only in the elevating direction, and the durability of the power supply path can be improved. .

According to the invention of claim 7, according to claim 6,
In addition to the effects described in (1), the space occupied by the fluid pressure supply path can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a first embodiment of a work loading / unloading device according to the present invention.

FIG. 2 is a front view of a work loading / unloading device.

FIG. 3 is a right side view of the work loading / unloading device.

FIG. 4 is an enlarged cross-sectional view showing a pressure oil supply path of the work loading / unloading device.

FIG. 5 is an enlarged plan view of a work loading / unloading device.

FIG. 6 is a side view illustrating the operation of the work loading / unloading device.

FIG. 7 is a side view illustrating the operation of the work loading / unloading device.

FIG. 8 is a front view showing a second embodiment of the work loading / unloading device of the present invention.

FIG. 9 is an enlarged front view showing a work loading / unloading device.

FIG. 10 is a right side view showing the work loading / unloading device.

FIG. 11 is an enlarged perspective view showing a main part of a work loading / unloading device.

FIG. 12 is a side view illustrating the operation of the work loading / unloading device.

FIG. 13 is a side view illustrating the operation of the work loading / unloading device.

FIG. 14 is a side view illustrating the operation of the work loading / unloading device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Base, 12 ... Mounting stand, 13 ... Bearing, 15 ... Work gripping mechanism, 21 ... Revolving table, 22 ... Support shaft, 25 ...
Elevating frame, 25a, 25b ... oil passage, 26 ... elevating guide rod, 26a, 26b ... oil passage, 28 ... elevating cylinder, 31 ... longitudinal rod, 32 ... longitudinal block, 3
2a: Guide hole, 35, 36: Work support rail, 35
a, 36a: stepped portion, 41: cylinder for longitudinal movement, 43 ...
Vertical guide rod, 44: lifting / lowering operation permitting mechanism, 50: positioning mechanism, 58, 59, 60 ... first, second, and third work clamp mechanisms, 71: rotary joint, 72a
~ 72f ... annular groove, 73 ... oil tank, 74 ... pump, 7
5 to 77 ... first to third electromagnetic switching valves, 78a to 78f ...
Oil passages, 79a to 79d: piping, 79e, 79f: oil passages, 91: base frame, 92: oil passage forming plate, 92
a, 92b: oil passage, 97: oil pipe.

Claims (8)

[Claims] 1. An elevating frame is mounted on a base frame via an elevating guide mechanism so as to be able to elevate and lower, and an elevating actuator for elevating the elevating frame is mounted on the base frame. A forward / backward moving frame for supporting a work is mounted by a forward / backward moving actuator via a moving guide mechanism so as to be able to move forward and backward, and the forward / backward moving frame is moved up and down and back and forth to load and unload the work, and is clamped by a work clamping mechanism. A work loading / unloading device for a machine tool configured to reciprocate between a position and a position of a back and forth movement actuator. Elevating the vertical frame to move up and down in synchronization with the elevating frame Containers mechanism provided, the workpiece loading and unloading apparatus in a machine tool power supply path provided Ann flexible to the base frame to the back-and-forth movement actuator. 2. The longitudinal movement permitting mechanism according to claim 1, wherein a guide rod connected to a longitudinal movement rod of the longitudinal movement actuator so as to be orthogonal to a central axis of the rod penetrates a guide hole formed in the longitudinal movement frame. Work loading / unloading device in a machine tool constituted by: 3. The swivel table according to claim 1, wherein the elevating actuator and the longitudinal actuator are hydraulic cylinders, and the base frame is supported by a pair of bearings so as to be able to reciprocate within a predetermined angle range. A rotary joint for guiding fluid pressure from a fluid pressure supply source to the forward / backward moving fluid pressure cylinder is attached to at least one of the spindles of the turning table,
The input / output port of the rotary joint on the turning table side and the input / output port of the lifting / lowering fluid pressure cylinder and the forward / backward moving fluid pressure cylinder are fixedly attached to a fluid passage formed in the rotating table itself or to the rotating table. A work loading / unloading device in a machine tool connected by at least one of external pipes. 4. The rotating table according to claim 3, further comprising: a positioning mechanism for receiving and supporting the work supported by the forward and backward moving frame when the lifting frame is lowered, and supported by the positioning mechanism. The input / output port of the clamping fluid pressure cylinder, which constitutes the clamp mechanism, and the input / output port on the rotary table side of the rotary joint are provided with a fluid provided on the rotary table. A work loading / unloading device in a machine tool connected by at least one of a passage or an external pipe. 5. The swivel table, the up-down frame and the back-and-forth movement in a state in which the swivel table and the back-and-forth movement frame are held in a horizontal state, and the back-and-forth movement frame is held at the lowest position together with the up-down frame. The frame is a work loading / unloading device in a machine tool configured to perform the following operations. -The operation of raising the lifting frame and the front and rear moving frame from the lowermost position to the uppermost position by the lifting hydraulic cylinder. After the above operation, an operation of receiving the work by moving the elevating frame and the forward / backward moving frame from the uppermost position to the work transfer position. An operation of retracting the front-rear moving frame that has received the work to the uppermost position. -After the above operation, an operation of lowering the retracted longitudinal frame to the lowest position and transferring the work to the positioning mechanism.・ After the above operation, the operation to clamp the work by the clamp mechanism. -After the above operation, the operation of rotating the turning table, the elevating frame, and the front-rear moving frame by a predetermined angle about the support shaft to move the work to the processing position. 6. An elevating frame is mounted on the base frame via an elevating guide mechanism so as to be able to elevate and lower, and an elevating actuator for elevating the elevating frame is mounted on the base frame. A forward / backward movement frame for supporting the work is mounted via the movement guide mechanism so as to be able to move back and forth, the forward / backward movement actuator is mounted on the lifting / lowering frame, and the work is carried in and out by moving the front / back movement frame up and down and back and forth. The workpiece is reciprocated between a position and a clamping position of a workpiece clamping mechanism, and a power supply path to the longitudinal movement actuator is unflexibly provided in the lifting frame and the lifting guide mechanism. apparatus. 7. The lifting actuator according to claim 6, wherein the lifting actuator and the forward / backward moving actuator are fluid pressure cylinders, and the lifting / lowering guide mechanism is connected to the lifting / lowering frame, and is vertically inserted into a pair of left and right guide holes of a base frame. A pair of fluid passages formed by a pair of penetrating lifting rods penetrated, and a supply path of fluid pressure to a forward / backward moving hydraulic cylinder attached to the lifting frame is formed by a pair of fluid passages formed through the insides of the both lifting rods. And a pair of fluid passages formed in the elevating frame and connected to the two fluid passages, respectively, and one of the fluid passages on the elevating frame side is a forward port of a forward / backward moving hydraulic cylinder. And the other fluid passage is connected to a machine tool connected to the reverse port of the hydraulic cylinder for longitudinal movement. Work loading / unloading device. 8. The moving frame according to claim 6, wherein the lifting frame and the front-rear moving frame are always kept in a horizontal state, and a turning table is mounted above the front-rear moving frame.
A positioning mechanism for positioning the work and a clamp mechanism for clamping the work are mounted on the swivel table, and the lifting frame, the forward / backward movement frame and the swivel table carry in / out the work in a machine tool configured to perform the following operations. apparatus. An operation in which the vertical frame and the vertical frame are raised from the lowermost position to an intermediate height position corresponding to the workpiece transfer position by the hydraulic cylinder for longitudinal movement. After the above operation, an operation of receiving the work by advancing the elevating frame and the front-back movement frame to the work transfer position by the front-rear movement fluid pressure cylinder. -After the above operation, an operation of retracting the front-rear moving frame receiving the work to the intermediate height position. After the above operation, an operation of moving the retracted elevating frame and the back-and-forth moving frame to the uppermost position and positioning the work by the positioning mechanism on the turning table side.・ After the above operation, the work is clamped by the clamp mechanism on the turning table side. -After the above operation, an operation of moving the lifting frame and the front-back movement frame to the lowermost position. -After the above operation, the operation of turning the turning frame to the processing position of the work.