JPH0248195Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a jig having a clamping/unclamping function that can automatically attach and detach various cartridges to which a plurality of workpieces are attached.

[Conventional technology]

Conventionally, tombstones installed on pallets used for transporting FMS etc. have only two or four surfaces on which workpieces can be attached, and the work of attaching them to the tombstones has been dependent on procurement.

[Problem that the invention attempts to solve]

When attempting to manually mount a large number of workpieces on the limited mounting surface of the tombstone, the mounting method varies from person to person and requires skill.
The working posture was also poor, there was a natural limit to installing a large number of units, and work efficiency was poor, which was a factor that hindered productivity.

The present invention was made in order to solve the above-mentioned problems.The tombstone provided on one pallet is a polygonal prism, and the cartridge is automatically equipped with fixtures for attaching workpieces to each side of the polygonal tombstone. The purpose of the present invention is to provide a jig having clamp/unclamp functions that can be attached and detached, improve working ability, and expand productivity.

[Means for solving problems]

A means of solving the above problems of the present invention is a jig which is installed on an indexable table or pallet of a machine tool and has a clamping/unclamping function, and which is installed upright on the table or pallet. A polygonal tombstone having a plurality of mounting surfaces in a direction perpendicular to the top surface of the table or pallet, a mounting surface that abuts the mounting surface of the polygonal tombstone on one surface, and a protrusion approximately in the center of this mounting surface. a jig block for fixing a plurality of workpiece fixtures on the other surface; a positioning means provided on the polygonal tombstone or the jig block for positioning the jig block with respect to the polygonal tombstone; a clamping means provided for each mounting surface of the polygonal tombstone, which engages with the protrusion when the jig block and the polygonal tombstone come into positioning contact, and clamps and presses the jig block toward the polygonal tombstone; , a biasing means for constantly biasing the jig block toward the polygonal tombstone by biasing the clamping means; and a biasing means provided movably in the clamping direction for each mounting surface of the polygonal tombstone, and a protrusion with the clamping means. a pressing body that presses and moves the clamping means when releasing the engagement state with the child; and a pressing body provided at an upper fixed position of the polygonal tombstone;
unclamping actuating means capable of advancing and retracting toward the polygonal tombstone; an actuating force capable of being transmitted to the pressing body at the upper part of each mounting surface of the polygonal tombstone; This jig has a clamp/unclamp function, and includes an unclamp operation transmission means for unclamping the jig block against the urging means.

[Effect]

The various mounting jigs provided on the cartridges attached to the mounting surfaces of the polygonal tombstone of the present invention automatically open and close when engaged with an external drive source (not shown), and the cartridges are attached to each mounting surface of the polygonal tombstone. can be automatically attached and detached.

Therefore, it is possible to attach a plurality of various workpieces in a short time according to the production schedule, transport the plurality of workpieces simultaneously, and improve productivity more than ever before.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a partial cross section of a tombstone on a pallet.

A tombstone 2, which is a polygonal tombstone, is placed on the pallet 1, and a clamp device 5 is provided at the center of the tombstone 2, which faces the mounting surface 4 of a cartridge 3, which is a jig block to be attached to the tombstone 2. There is.

Positioning pins 6 are arranged at symmetrical positions above and below the clamp device 5, respectively.

Three scroll chucks 8 are provided on the front side of the cartridge 3 attached to each cartridge attachment surface 4 of the tombstone 2 as workpiece attachments for gripping the workpiece 7, and on the back side of the cartridge there are provided scroll chucks 8 that are fitted into the positioning pins 6. A possible pin hole 9 is provided in each case.

A pull stud 10, which is a protrusion, is provided on the back surface of each cartridge 3 corresponding to the clamp device 5 provided in the middle of the positioning pin 6.

Next, the structure of the clamp device 5 inside the tombstone 2 will be explained in detail.

A cylindrical body 12 having a flange formed at one end is inserted into a hole 11 perpendicular to each cartridge mounting surface 4 of the tombstone 2, and the flange portion is fixed to the tombstone 2 with bolts.

A drawbar 13 having a piston 14 at one end and a grip 15 at the other end is slidably inserted into the cylinder 12.

A hole 16 into which the pull stud 10 can be inserted is formed in the grip portion 15 of the drawbar 13, and steel balls 18 are inserted into a plurality of through holes 17 formed in the radial direction around the hole 16. ing.

A ring groove 19 is formed in the inner circumferential wall of the cylinder body 12 on the side of the pull stud 10, into which the steel ball 18 in the gripping part 15 falls as the drawbar 13 moves in the axial direction. There is.

On the other hand, the piston 14 provided at one end of the drawbar 13 and the cylindrical body 12 constitute a cylinder that is a pressing body. A disc spring 21 is interposed between the piston 14 and a small-diameter stepped hole 20 formed at the center of the cylindrical body 12, and constantly urges the drawbar 13 to retract.

A cylinder 22 is provided on the upper surface of the tombstone 2, and a piston 23 is mounted inside the cylinder 22 with a spring 2.
4, a piston rod 25 integrally formed with the piston 23 protrudes from the upper surface of the tombstone 2.

Furthermore, a communication hole 28 is provided in the tombstone 2 that communicates with a cylinder chamber 26 in the cylinder 22 and a cylinder chamber 27 on the side opposite to the disk spring 21 side of the piston 14 in the cylindrical body 12 into which the drawbar 13 is inserted. It is being

The communication hole 28, the cylinder 22 and the cylindrical body 1
Oil is sealed in each of the cylinder chambers 26 and 27 in the cartridge 2, and when the piston rod 25 is pressed from the outside, the oil inside is compressed, the drawbar 13 is pushed back against the disc spring 21, and the cartridge 3 The pull stud 10 becomes unclamped.

What is sealed in the communication hole is not limited to oil, but may be any other pressure fluid, or may include a plurality of spheres arranged side by side.

As shown in FIG. 2, unclamping piston rods 25 _-1 to 25 _-8 are provided on the top surface of the tombstone 2, corresponding to each surface.

Next, in Figures 4 and 5, tombstone 2
An automatic setup station equipped with a loading device 30 for automatically loading and unloading each cartridge 3 will be described.

In order to attach each cartridge 3 to the tombstone 2 that has been conveyed and positioned on the indexing table 32 of the automatic setup station 31, the cartridge mounting surface is indexed to a predetermined position by the indexing table 32.

On the other hand, a gate-shaped frame 45 is provided on the base B, straddling the tombstone 2 on the index table 32.

An unclamping cylinder C, which is an unclamping operation means, is provided on the frame 45 at a position facing the piston rod 25 _-1 of the indexed tombstone 2 .

A transport line 33 is provided adjacent to the indexing table 32 of the setup station 31, and is configured so that when a desired cartridge comes to a position facing the mounting surface of the tombstone 2, it can be accurately stopped at a predetermined position.

Cartridges 3 _-1 to 3 _-4 on the conveyance line 33 are placed on a transfer bar 34 that moves in a lift-and-carry, ie, square cycle, and are sent in pitch.

A lifter 35 is provided on the conveyance line 33 directly below a predetermined cartridge exchange position.

Furthermore, a loading device 30 is provided at a position facing the front surface of the tombstone 2 across the transport line from the indexed cartridge loading/unloading position.

The body 38 of the loading device 30 is based on the base 3.
The tombstone 2 is movable forward and backward relative to each cartridge mounting surface of the tombstone 2 by two guide bars 37 provided on the tombstone 6 .

A pivot shaft 39 is provided at the tip of the tombstone side of the body so as to be swingable by a swing motor 40, and a swing arm 41 is fixed to the pivot shaft 39.

Two claws 42 are pivotally supported at each tip of the swing arm 41 by a cylinder 43 so as to be openable and closable.

Next, another embodiment will be explained with reference to FIGS. 6 and 7.

The above-mentioned clamping device 5 is provided on each cartridge mounting surface of the tombstone 2.

Further, coupling rings 29 for positioning the cartridge 3' are provided above and below the clamping device 5,
A coupling ring 2 that engages with the coupling ring 29
9' is also provided on the cartridge 3' side, and each coupling is formed into an arcuate ring with the clamping device 5 at its center.

Therefore, the cartridge 3' is positioned by the engagement of these coupling rings 29, 29'.

The operation of this embodiment configured as above will be described.

As shown in FIGS. 4 and 5, a predetermined surface of the tombstone 2 that has been conveyed and positioned on the indexing table 32 is indexed to the cartridge 3 attachment/detachment position L.

The desired cartridge to be replaced on the conveyance line is stopped in front of the tombstone 2 at the attachment/detachment position.

The body 38 of the loading device 30 on the base 36 is moved backward by the cylinder 44, and the swing arm 41 swings toward the conveyance path using the pivot shaft 39 as a fulcrum, and waits with the two claws 42 open. There is.

That is, in this state, each cartridge 3 on the transport line can pass between the claws 42, 42 of the loading device 30.

When a desired cartridge on the conveyance line stops in front of the exchange position, the lifter 35 located below raises the cartridge 3.

The cartridge 3 in the raised position is connected to the cylinder 43
It is gripped by the claws 42 by the action of.

Next, the swinging arm 4 holding the cartridge
1 is swung by a swiveling motor 40 until it becomes horizontal, and the body 38 of the loading device 30 is guided by a guide bar 37 by a cylinder 44 and moves forward toward the cartridge mounting surface of the tombstone 2.

At this time, the drawbar 13 on the tombstone 2 side is moved to the piston rod 25 by the unclamping cylinder C.
Since the steel ball 18 is in a pressed state, the oil in the communication hole 28 moves forward due to the compression action, and the steel ball 18 is pushed into the ring groove 1.
It has dropped to within 9 and is now unlocked.

That is, in this state, the cartridge 3 is moved to the mounting surface 4 of the tombstone 2 by the forward movement of the loading device 30. The positioning pins 6 on the tombstone mounting surface fit into the pin holes 9 of the cartridge 3, respectively.
The pull stud 10 in the center is also inserted into the hole 16 of the draw bar 13, and the tombstone and cartridge mounting surfaces are in close contact.

When the unclamping cylinder C is released from the unclamping cylinder C, the drawbar 13 is moved backward by the action of the disc spring 21, and the pull stud 10 of the cartridge 3 is clamped.

The operation for removing each cartridge 3 from the tombstone 2 is performed in the opposite manner to that described above.

When the loading/unloading operation by the loading device is completed, the swing arm 41 returns to the standby position indicated by the two-dot chain line in FIG.

It goes without saying that the workpiece mounts (scroll chucks) etc. provided on the cartridge can be adapted depending on the type and shape of the workpiece. ) can be attached and detached.

[Effect of idea]

As described above, according to the present invention, the tombstone has a large number of mounting surfaces, and the cartridges with various pre-clamped workpieces attached to the mounting surfaces are mounted using a loading device that automatically attaches and detaches them, thereby reducing the production schedule. In addition to being able to flexibly respond to changes as needed, it is also possible to transport a large number of workpieces at the same time, and by automating setup work that previously relied on manual labor, it is possible to significantly improve productivity.
This has the effect of promoting unmanned factories.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a cartridge attached to a tombstone showing an example of the essential parts of the present invention, Fig. 2 is a plan view of the tombstone, Fig. 3 is a side view of the tombstone, and Fig. 4 shows loading at the setup station. FIG. 5 is an overall plan view of the loading device at the setup station; FIG. 6 is a partial sectional view of a tombstone showing another embodiment; FIG.
The figure shows a sectional view taken along the line AA in FIG. In the figure, 1... pallet, 2... tombstone, 3... cartridge, 5... clamp device,
6... Positioning pin, 7... Work, 8... Scroll chuck, 9... Pin hole, 10... Pull stud, 13... Draw bar, 15... Gripping part,
21... Belleville spring, 22... Cylinder, 28... Communication hole, 29... Coupling, 30... Loading device, 32... Indexing table, 33... Conveyance line, C... Unclamping cylinder.

Claims (1)

[Claims for Utility Model Registration] A jig that is installed on an indexable table or pallet of a machine tool and has a clamping/unclamping function, which is installed upright on the table or pallet, and that is installed on the table or pallet of a machine tool. a polygonal tombstone having a plurality of mounting surfaces in a direction perpendicular to the upper surface; a mounting surface that abuts the mounting surface of the polygonal tombstone on one surface; and a protrusion formed approximately in the center of the mounting surface; a jig block for fixing a plurality of workpiece fixtures on the other surface; a positioning means provided on the polygonal tombstone or the jig block for positioning the jig block with respect to the polygonal tombstone; a clamping means provided for each mounting surface, which engages with the protrusion and presses and clamps the jig block toward the polygonal tombstone when the jig block and the polygonal tombstone come into positioning contact; a biasing means for constantly biasing the jig block toward the polygonal tombstone by biasing the means; a pressing body that presses and moves the clamping means when releasing the engaged state; and a pressing body provided at an upper fixed position of the polygonal tombstone;
unclamping actuating means capable of advancing and retracting toward the polygonal tombstone; an actuating force capable of being transmitted to the pressing body at the upper part of each mounting surface of the polygonal tombstone; 1. A jig having a clamp/unclamp function, comprising an unclamp operation transmitting means for unclamping the jig block against the urging means.