JPH0214918Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a transfer device installed near an NC machine tool that transfers objects such as workpieces by a robot.

"Conventional technology" In order to operate NC machine tools as effectively as possible, a conveyance device for workpieces, etc. is installed close to the NC machine tool, and various or large quantities of workpieces or tools are transferred to the NC machine by the conveyance device. It is being fed to machines.

Conventionally, proposed conveyance devices generally operate synchronously as a whole using the same drive source.

``Problems that the invention aims to solve'' However, with such conventional multilayer conveyor devices, apart from continuous machining at a fixed pitch, workpieces and tools are placed on a feeder (hereinafter referred to as a conveyance path), When using them differently, when one workpiece conveyance path is driven, the other tool conveyance path also rotates, requiring twice as many calls during setup changeovers, and the NC machine tool may become idle. There was a problem.

The present invention was developed by focusing on these conventional problems, and is a conveyance system that solves the above problems by making it possible to stop and hold the workpiece even when the conveyance path is in operation. The purpose is to provide equipment.

``Means for Solving the Problems'' The gist of the present invention to achieve this purpose is to: In a conveying device that is installed close to an NC machine tool and supplies objects to be conveyed to the NC machine tool, A first conveying body on which a plurality of claws are mounted to feed the chuck fixed to the main shaft among a plurality of conveying bodies configured in multiple stages vertically on the base of the conveying device to convey the object to be conveyed; A second conveying body that conveys objects to be conveyed other than the nails among the plurality of conveying bodies configured in multiple stages; and a driving body that is provided on the base of the conveying device and drives the multi-stage conveying bodies by a drive unit. a cradle that rotates in conjunction with the first carrier at a predetermined rotation ratio and is movable up and down on the first carrier; a first transmission device for transmitting data to the table; a second transmission device provided across the vertically configured transport bodies for driving the first transport body; a third transmission device that rotates relative to the second transmission device and engages with the second conveyance body; and a third transmission device that is detachably provided between the second transmission device and the third transmission device and engaged with the third transmission device. By this,
The second transmission device and the third transmission device are integrated, and when the second transmission device and the third transmission device are separated, the second transmission device and the third transmission device are separated, and the clutch member does not transmit driving force. A lifting device is fixed to the base for engaging and moving, and a lifting device is placed on the pedestal and is equally spaced on the outer periphery to replace the claws on the chuck and the claws on the first carrier. The present invention relates to a conveyance device comprising a pawl magazine having a pawl engaging portion on the holder and capable of sequentially transferring pawls from the first conveying body by the operation of the pedestal.

``Operation'' By disengaging the clutch mechanism, the rotating disk can be stopped, and even if processing time is required, the conveyance path can be operated and used effectively. It is.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 3, a conveying device 10
is installed near the NC machine tool 1, and the robot 2 that delivers the workpiece W etc. to the NC machine tool 1 is the NC machine tool 1.
and the transport device 10. The hand 2a of the robot 2 is rotatable around its base and can be raised and lowered as a whole.

The conveyance device 10 is provided with a conveyance path 20 at the top,
It has a multi-stage feeder with a rotary disk 30 provided at the bottom, pallets 21, 21, . I am doing it.

As can be seen in FIG. 1, a cylinder 11 that also serves as a pivot tube is installed upright on the support plate 10a of the conveyance device 10, and a sprocket 22, which is a driven member in the conveyance path 20, is fitted onto the outside of the cylinder 11 so as to be freely rotatable. A gear 2 is fitted to the upper end of the shaft cylinder 12 and is integrally formed at the lower part of the sprocket 22.
3 is engaged with an output gear 25 of a motor 24 which is a driving source.

A drive chain 26 is wound around the sprocket 22, and a pallet 21 is connected to the drive chain 26. The pallet 21 is provided with wheels 21a, 21a on its lower surface that run on an upper support plate.

A rotating disc 30 is fixed to the lower end of the shaft cylinder 12, and a transmission sprocket 32 is fixed to the lower part of the rotating disc 30.

A transmission plate 13 is fixed to the upper end of the cylinder 11, and the upper end of the cylinder 11 and the transmission plate 13
The clutch operating shaft 14 freely passes through the lower end 1.
4a protruding into the cylinder 11, a relay plate 15 is connected to the upper end of the clutch operating shaft 14, and a pin 16 that loosely fits into one end of the transmission plate 13 is implanted in the relay plate 15. .

A fitting hole 22a into which the pin 16 engages and disengages is formed on the upper surface of the sprocket 22.

The clutch operating shaft 14 is urged downward by a spring 14b and is supported so as to be movable up and down, and the transmission plate 13, clutch operating shaft 14, relay plate 15, pin 16, fitting hole 22a, etc. operate the clutch mechanism. It consists of

The lower end of the cylinder 11 is closed with a lid, a piston 11a that slides inside the cylinder 11 is inserted into the cylinder 11, and a thrust rod 11b fixed to the piston 11a extends upward.

A protruding side supply/discharge port 17 is provided at the lower end of the cylinder 11, and a retraction side supply/discharge port 18 is provided passing through the center of the shaft tube 12.

The protruding side supply/discharge port 17 and the retraction side supply/discharge port 18 are configured to supply hydraulic pressure into the cylinder 11 in the protruding state,
A hydraulic pressure switching control valve 19 that switches to the retracted state is provided between the hydraulic pressure source and the hydraulic pressure source.

A magazine support device 40 is provided at a position adjacent to and slightly protruding from the shaft cylinder 12.

In the magazine support device 40, a rotating shaft 42 formed with a spline is fitted into a pivot member 41 fixed to a support plate 10a, and a cradle 43 is attached to the upper end of the rotating shaft 42.
is fixedly installed.

The lower end of the rotary shaft 42 is supported via a lifting rod 45 whose lower end protrudes downward and is biased by a spring 44, and is connected to an input sprocket 46 fitted to the rotary shaft 42 via a spline so as to be able to transmit rotation. A relay chain 47 is wound between the sprocket 32 and the sprocket 32.

A lifting pin 48 that is driven up and down by a drive unit (not shown) comes into contact with the lower end of the lifting rod 45 of the magazine support device 40, and a claw magazine 50 is placed on the pedestal 43.

The claw magazine 50, as shown in FIGS. 3 and 4, is for replacing the claws 70 of the chuck body 60.

That is, the claw magazine 50 has three claw gripping grooves 51.
A claw 70 is formed on the side wall of each claw gripping portion 51.
The bottom wall of the claw gripping groove 51 is provided with a holding protrusion 52 that engages with and holds the engagement hole 71 in the side wall of the tool, but can retract and release the claw 70 when the claw 70 is pulled with more than a predetermined force. A positioning pin 53 that fits into the positioning hole 72 of the claw 70 is provided in a protruding manner.

The chuck body 60 has a mounting hole 73 (fifth
Clamp pin 61 with enlarged head that can be engaged and detached from the
is provided to protrude from the master jersey 63, and a float pin 62 is provided in the center of the master jersey 63 so as to be protrusive.

The pawl 70 is loosely fitted onto a positioning pin 33 fixed to the mounting portion 31 of the rotary disk 30 .

Next, the action will be explained.

In the state shown in FIG. 1, when the motor 24 is operating and the sprocket 22 is rotated by the output gear 25 and gear 23, the drive chain 26 moves to move the pallet 21 and move the pallet 21. transport.

On the other hand, since the pin 16 is fitted into the fitting hole 22a and the clutch mechanism is in the connected state, the relay plate 15 is also rotated as the sprocket 22 is rotated, and the shaft cylinder 12 is also rotated via the transmission plate 13. The rotating disk 30 also rotates integrally.

Furthermore, a transmission sprocket 32, a relay chain 4
7. The rotating shaft 42 and pedestal 43 of the magazine support device 40 also rotate via the input sprocket 46.

In this manner, when the clutch mechanism is in the connected state, the conveyance path 20 and the rotating disk 30 operate integrally, and the magazine support device 40 also rotates in synchronization with the rotating disk 30.

When it is desired to stop the rotary disk 30 alone, the hydraulic pressure switching control valve 19 supplies hydraulic pressure to the protruding side supply/discharge port 17 to raise the piston 11a. When the piston 11a rises, the lower end 14a of the clutch operating shaft 14 is pushed by the upper end of the thrusting rod 11b, and the clutch operating shaft 14 moves upward, and the relay plate 15 also moves together, causing the pin 16 to move between the transmission plate 13 and the sprocket. 22 fitting hole portion 22a
The clutch mechanism will become disconnected.

In that case, even if the sprocket 22 rotates, the relay plate 15 and transmission plate 13 will not rotate.
The power of the motor 24 is no longer transmitted to the rotating disk 30. Therefore, the rotating disk 30 stops, and the magazine 50 placed on the pedestal 43 of the magazine support device 40 is also synchronously indexed and stopped.

When replacing the claw 70 on the chuck body 60, it is necessary to remove the claw 70 currently attached to the chuck body 60 and then attach another claw 70.
need to be stopped.

In such a case, by disengaging the clutch mechanism as described above, the rotating disk 30 can be stopped while the conveyance path 20 is operated, and a predetermined process can be performed.

Considering the case where a new pawl 70 is attached to the chuck body 60, when the pawl magazine 50 is at a predetermined position to be indexed, the hydraulic pressure switching control valve 19 supplies hydraulic pressure to the protruding side supply/discharge port 17 and the piston 11
Raise a to disengage the clutch mechanism. As a result, the claw gripping grooves 51 of the claw magazine 50 are opposed to and stopped above the claws 70 placed on the rotary disk 30.

When the claw magazine 50 stops rotating, the lifting pin 4
8 descends, and the rotating shaft 42 forming a spline, the pedestal 43, and the claw magazine 50 also descend, and the claw magazine 5
The claw 70 fits into the claw gripping groove 51 of 0.

When fitted, the retaining protrusion 52 of the claw magazine 50
is engaged with the engagement hole 71 of the claw 70, and the positioning pin 5
3 is fitted into the positioning hole 72, and the claw 70 is positioned and attached to the claw magazine 50.

Since the positioning pin 33 is fitted into the mounting hole 73 of the claw 70, the robot 2 grabs the claw magazine 50 and moves it laterally to pull it out, and then the rotating shaft 42, the pedestal 43, and the claw magazine 50 are removed by the lifting pin 48. to rise.

This magazine support device 40 performs the three operations described above.
The nail magazine is repeatedly installed in each of the three grooves 51 formed in the nail magazine.

Now that one claw 70 has been attached to the claw magazine 50, at the same time, the protruding side supply/discharge port 1
7 and supplies hydraulic pressure to the retraction side supply/discharge port 18, the piston 11a is lowered, the clutch operating shaft 14 is lowered by its own weight and the biasing force of the spring 14b, and the pin 16 is inserted into the transmission plate 13. It fits into the fitting hole 22a of the sprocket 22, and the clutch mechanism becomes connected.

Therefore, the shaft cylinder 12 is rotated, and the rotary disk 30 also comes to operate integrally with the conveyance path 20 as described above, so that the next claw 70 is placed in the next claw gripping groove 51 of the claw magazine 50. Move to the corresponding position,
Further, the clutch mechanism is disengaged as described above, and the pawl 70 is similarly installed in the pawl gripping groove 51 of the pawl magazine 50.

When all the jaws 70 are attached to the jaw magazine 50, the arm of the robot 2 moves, grips the jaw magazine 50 in its fingers, and carries it to the chuck body 60 attached to the NC machine tool 1.

How to attach the claw 70 will be explained with reference to FIG.
Before the claw 70 is attached, the master jaw 63 of the chuck body 60 is in the fully open position.

As shown in FIG. 5a, the pawl magazine 50 has a pawl 7
The clamp pin 61 of the chuck body 60 is moved so as to correspond to the mounting hole 73 of No. 0, and the clamp pin 61 is fitted into the mounting hole 73 as shown in FIG. 5B. In this state, when the master jaw 63 is closed as shown in FIG. is at the position where it pushes the head of the positioning pin 53.

Therefore, when the claw magazine 50 is moved backward, the claw 7
0 remains attached to the chuck body 60, and the float pin 62 fits into the positioning hole 72, as shown in FIG.
The position of the claw 70 is determined and fixed as shown in FIG.

When removing the claw 70, the procedure is reversed, and if the claw 70 is of the outward expansion type, the operation of the float pin 62 will be reversed.

The claw magazine 50 from which the claws 70 have been removed is returned and placed on the pedestal 43 of the magazine support device 40.

In the above embodiment, a case was shown in which the chuck pawl was placed on the rotary disk for replacement, but a tool or the like may also be placed on it. Further, it is also possible to prepare a plurality of claw magazines and place them on the auxiliary cradle.

Moreover, although the conveyance path is illustrated as having one stage, it may be multi-stage, and a rotating disk can be provided attached to the multi-stage conveyance path.

"Effect of the invention" According to the conveying device according to the present invention, a rotating disk driven by the same drive source as the conveying path is provided, and chuck claws, tools, etc. are placed on the rotating disk, and the NC machine tool is In addition, if necessary, the rotating disk can be stopped while the conveyance path is running, without interfering with the conveyance of the conveyance path.This allows workpieces to be efficiently transferred to the NC machine tool. It is possible to minimize machine play and increase production efficiency.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the main part of the conveying device, Fig. 2 is a perspective view of the conveying device, and Fig. 3 is an exploded perspective view of the chuck and the claw magazine. FIG. 4 is a perspective view of the claw magazine, and FIG. 5 is an explanatory diagram showing the procedure for replacing the claws. 1...NC machine tool, 2...robot, 10...
...transport device, 20...transport path, 30...rotating disk, 40...magazine support device.

Claims (1)

[Claims for Utility Model Registration] In a conveying device that is installed close to an NC machine tool and supplies objects to be conveyed to the NC machine tool, in order to convey the objects to be conveyed, the base of the conveying device is provided with a plurality of upper and lower stages. Among the plurality of conveyance bodies configured, a first conveyance body on which a plurality of claws are placed to feed the chuck fixed to the main shaft; and among the plurality of conveyance bodies configured in multiple vertical stages, objects to be conveyed other than the claws. a second conveying body that conveys a second conveying body; a driving body that is provided on the base of the conveying device and drives the multi-stage conveying body by a drive unit; and a driving body that rotates in conjunction with the first conveying body at a predetermined rotation ratio. a pedestal provided to be movable up and down on the first transport body; a first transmission device for transmitting the driving force via the driving body to the pedestal; and the first transport unit. a second transmission device provided astride the conveying body configured above and below to drive the body; and a second transmission device that rotates relative to the second transmission device and engages with the second conveying body. A transmission device of No. 3 is detachably provided between the second transmission device and the third transmission device, and when engaged, the second transmission device and the third transmission device are integrated. , a clutch member that, when disengaged, causes the second transmission device and the third transmission device to separate and do not transmit driving force; and a lifting device fixed to the base for engaging and moving the clutch member. and, in order to exchange the pawls on the chuck and the pawls on the first conveying body, the chuck is placed on the pedestal and has pawl engaging portions equally spaced on the outer periphery, and the movement of the pedestal causes the first conveying body to be replaced. A transport device comprising a claw magazine capable of sequentially transferring claws from a transport body.