JPH0121718Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a table device for automatic pallet changing in a machine tool equipped with an automatic tool changer, etc. It relates to a device equipped with a jig on which two types of workpieces can be attached back to back.

(Prior art) In an automatic pallet changing table device that supports and rotates pallets conveyed from a conventional pallet changer that attaches and detaches workpieces, processing efficiency has been improved and workpieces can be In order to accommodate different mounting angles, directions, etc., it is known that a workpiece mounting jig is provided on a pallet so that two types of workpieces can be mounted back to back. By the way, when mounting and removing two types of workpieces back to back on a mounting jig, it is necessary to use a mounting jig in order to enable the operator to work with a pallet changer and to make the work easier. It is necessary to construct the pallet so that it can be rotated by 180 degrees.

Therefore, in the past, a pallet changer, that is, a mechanism that allows the operator to rotate the pallet by 180 degrees at the workpiece attachment/detachment position is separately provided (for example, Japanese Patent Publication No. 54-28634). However, providing such a mechanism for rotating the pallets on the pallet changer complicates the structure and increases costs, so improvements have been sought.

(Purpose of the invention) The present invention is in response to the above-mentioned requirements, and by using a turntable of a machine tool to reverse the pallet, that is, the workpiece, in the pallet changer, the workpiece can be easily mounted on the pallet with a simple structure. An object of the present invention is to provide an automatic pallet exchange table device capable of mounting and removing works on both sides of a jig.

(Structure of the invention) The invention is an automatic machine equipped with a pallet equipped with a jig that can mount two types of workpieces back to back, and a rotatable processing table that supports the pallet that is transported from the workpiece mounting/dismounting position. a pallet exchange table device, which is movable up and down to clamp a pallet carried onto the processing table from the diametrical direction thereof by moving downward;
At least one pair of pallets are arranged at positions in the diametrical direction of the processing table and are always urged in the projecting direction by an elastic member so that the pallets carried in from the workpiece mounting/dismounting position do not slip out of the processing table in the diametrical direction. The apparatus is equipped with a stopper member and a fixed locking member that locks only on the stopper member on the pallet loading side when the clamp device is raised, and prevents the stopper member from protruding from the upper surface of the processing table.

With this configuration, the pallet can be rotated using the table of the machine tool itself without providing a mechanism for rotating the pallet in the pallet changer.
Workpieces can be easily attached and detached from both surfaces of the jig at the position where the workpieces are attached and detached, that is, on the pallet changer.

(Example) Figures 1 to 5 show machine tools in which the automatic pallet changing table device of the present invention is implemented, and in the figures, 1 and 2 are columns of an automatic tool changer (ATC). and a drum on which various tools are set; 3 is a spindle head that grips various tools and moves up and down; 4 is a machining table whose sliding movement is controlled in arbitrary directions, front, back, left, and right; and rotational movement is controlled; 5 is its slide base. , 6 is a pallet on which workpieces to be processed are placed and transported to the processing table 4, and 7 is an automatic pallet changer (APC) table for mounting and removing the workpieces on the pallet 6 and exchanging the workpieces. Although not shown in this automatic pallet changer table 7, the pallet 6 is carried out from the mounting/dismounting position A onto the processing table 4, and vice versa.
A drive arm means such as a cylinder is provided for loading into the mounting and dismounting position A from above.

The processing table 4, as shown in FIG.
A table base 8 that is movable back and forth and left and right on the slide base 5; a table rotating body 10 rotatably supported by the table base 8 and rotatably driven by a worm gear 9; On the other hand, it is comprised of a clamper 12 which is stopped from rotating by a rod 11 and supported so as to be movable up and down, for clamping the pallet 6. The clamper 12 is connected to the table base 8
Fixed piston 13 and clamper 12 protruding from
In combination with a cylinder 14 formed integrally with the cylinder 14, oil is supplied from either one of the oil passages 15, 16 and oil is discharged from the other, thereby driving the cylinder up and down.

In addition, this clamper 12 has a
At least one pair of stopper pins 17a are provided at the diametrical position of the table 4, that is, the clamper 12, so that the pallet 6 carried onto the machining table 4 from the workpiece mounting/dismounting position A does not slip out from the machining table 4 in the diametrical direction. 17b is provided, and these stopper pins 17a, 17b are always urged in the projecting direction by an elastic member 18 such as a spring. Further, in order to prevent the stopper pin 17a on the carry-in side from getting in the way when the pallet 6 is carried in, when the clamper 12 rises, it is engaged only with the stopper pin 17a and the protrusion from the upper surface of the processing table 4 is prevented. A locking member 19 is provided in a fixed state on the table base 8 to prevent this.

Further, as shown in FIG. 3, the clamper 12 is provided with a clamping convex piece 12a that engages with a clamping recess 6a formed in the pallet 6 and clamps the pallet 6 when the clamper 12 is lowered.
Moreover, on the pallet 6, there are two types of workpieces 20,
Jig plate 2 for attaching 21 back to back
2 is fixed.

The operation of the automatic pallet exchange table device having the above configuration will be explained below. The worker is M in Figure 1.
One workpiece 20 is attached to the front side of the jig plate 22 on the pallet 6 on the automatic pallet changer table 7 at the workpiece attachment/removal position A. Thereafter, this pallet 6 is conveyed onto the clamper 12 on the processing table 4 by a drive arm means (not shown). At this time, clamper 1
2 is raised as shown by the arrow in FIG. 2, and the stopper pin 17a on the carry-in side does not substantially protrude from the upper surface of the clamper 12 due to the action of the locking member 19, while the other stopper pin 17b is made to protrude. Therefore, the pallet 6 conveyed onto the clamper 12 is placed on the stopper pin 17 on the front side.
Conveyance is not obstructed by a, and it does not come out of the processing table 4 in the diametrical direction in order to come into contact with the other stopper pin 17b. Thereafter, by lowering the clamper 12 as shown by the arrow in FIG.
and the clamping convex piece 12a, and the pallet 6 is clamped by the clamper 12.

Subsequently, the worm gear 9 is driven to rotate the table rotating body 10 by half a rotation. Then, the clamp 12 also rotates half a turn, so that the pallet 6
It will be rotated 180 degrees. From this state,
The stopper pin 1 moved to the carry-in side as the clamp for lifting the clamper 12 was released.
7b is fixedly provided on the table base 8 so that it does not protrude from the upper surface of the clamper 12, that is, the processing table 4, and the pallet 6 is moved from the processing table 4 to the automatic pallet changer table 7. It can be returned to the mounting/dismounting position A above. In other words, this results in palette 6
is rotated by 180 degrees from the previous state, and therefore, when viewed from the operator's position M, the back surface of the jig plate 22 in the above state is located on the front side, and other types of Workpiece 21 can be attached.

In this way, by using the rotation function of the processing table 4, the automatic pallet changer table 7
Two types of work pieces 2 can be placed on both sides of the jig plate 22 without providing a function to rotate the pallet 6 on the top.
0 and 21 can be easily attached or removed.

It should be noted that the present invention is not limited to the configuration of the above-described embodiment, but can prevent the stopper pin 17a on the pallet loading side from protruding when the pallet 6 is not clamped on the processing table 4, that is, when it is unclamped.
Various configurations can be adopted in which the other stopper pin 17b can protrude.

(Effects of the invention) As described above, according to the invention, a jig for mounting two types of workpieces back to back is attached, and a rotatable processing table is provided to support pallets conveyed from the workpiece mounting/dismounting position. In the table device, there is a clamping device that clamps the pallet carried in from the diametrical direction onto the processing table by moving downwards, and a clamping device that clamps the pallet carried in from the workpiece mounting/dismounting position by moving it downwards, and a clamping device that clamps the pallet carried in from the workpiece mounting/dismounting position at a position in the diametrical direction of the table so that it does not slip out of the table. stopper members disposed in at least one pair and biased to protrude;
By providing a fixed locking member that prevents the stopper member on the pallet loading side from protruding from the top surface of the processing table when the clamping device is unclamped, a table for reversing the pallet can be separately installed at the workpiece mounting/dismounting position. The pallet can be reversed by using the machine tool's turntable (processing table) itself as a rotatable table, which simplifies the configuration and allows workpieces to be mounted and removed on both sides of the jig. can be done easily.

[Brief explanation of drawings]

FIG. 1 is a plan view of a machine tool equipped with an automatic pallet exchange table device according to an embodiment of the present invention;
Fig. 2 is a sectional view of the main part taken along the line - - in Fig. 1, Fig. 3 is a sectional view taken along the - line of Fig. 1, Fig. 4 is a side view of the machine tool, and Fig. 5 is a front view thereof. . 4... Processing table, 6... Palette, 10...
...Table rotating body (part of table), 12...
Clamper (clamp device), 17a, 17b...
Stopper pin (stopper member), 18... elastic member, 19... locking member, 20, 21... workpiece, 22... jig plate (jig), A... workpiece attachment/removal position.

Claims (1)

[Scope of utility model registration request] An automatic pallet exchange table device comprising a pallet provided with a jig capable of mounting two types of workpieces back to back, and a rotatable processing table that supports the pallet being transported from a workpiece mounting/dismounting position, A clamping device that can be raised and lowered clamps the pallet carried in from the diametrical direction onto the processing table by moving downward, and a clamping device that clamps the pallet carried in from the workpiece mounting/removal device from the processing table in the diametrical direction. At least one pair of stopper members are disposed at positions in the diametrical direction of the table and are always urged in the protruding direction by an elastic member, and when the clamp device is raised, it is locked only to the stopper member on the pallet loading side, A table device for automatic pallet exchange characterized by comprising a fixed locking member that prevents the stopper member from protruding from the upper surface of the processing table.