JPH0533246Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an indexing position detection device for a pallet changer turntable suitable for detecting the indexing position of a turntable on which a pallet is mounted used in machine tools, etc. It is related to.

[Conventional technology]

Machine tools such as machining centers are equipped with pallet changers for inserting and removing pallets. The pallet is mounted on a turntable and positioned by indexing and rotating the turntable. As the indexing position, a position for inserting the pallet into the machine tool side, an indexing position for fixing jigs and workpieces on the pallet from multiple sides, etc. are required. In particular, detection of the position where the pallet is inserted into the machine tool side is important in terms of alignment with the other side. To index and position the turntable, an indexing pin may be inserted vertically from the bottom side of the turntable, but as shown in FIG. There are some things. That is, the pallet 7 is slidably mounted on the turntable 5 via roller members 9 of a guide plate 8 fixed on the turntable 5, and the turntable 5 is rotated by the rotation of the main shaft 6. As shown in FIG. 4, a plurality of U-shaped index positioning grooves 1 are recessed in the outer periphery of the turntable 5, and index pins 2 are inserted into these for positioning. The index pin 2 is supported within the holder 4 so that it can move in and out.

[The problem that the idea aims to solve]

In order to index and position the turntable, a limit switch (hereinafter referred to as LS) is required for interlocking the switch, but in the conventional technology, as shown in Fig.
0, turn on LS3a with dog 10,
It was turned OFF and the index positioning groove 1 was being positioned. Therefore, the structure becomes complicated and there is also the problem that the indexing operation is not always performed reliably. In particular, the indexing and positioning of the position where the pallet 7 is inserted into the machine tool side requires highly accurate positioning from the viewpoint of consistency with the other side, but there is a problem that the conventional technology is not necessarily sufficient.

The object of the present invention is to provide an indexing position detection device for a pallet changer turntable that can accurately and reliably determine the insertion position of a pallet into a machine tool using extremely simple means. be.

[Means to solve the problem]

To this end, the present invention has a pallet slidably mounted thereon, and the pallet is inserted into the index positioning groove at the insertion depth of one of a plurality of index positioning grooves recessed in the outer periphery of the rotating turntable. Indexing position detection of a pallet changer turntable in which an indexing pin is formed to a depth that turns a limit switch ON, and the insertion depth of the groove at the other indexing position is shallow enough to turn a limit switch OFF. It constitutes the device.

[Effect]

Only the index positioning groove that determines the index position of the turntable, which corresponds to the position where the pallet is inserted into the machine tool, is formed deep enough to turn the LS ON, so the LS will operate reliably at this position and will not work at other positions. It doesn't work. This ensures reliable detection of the position where the pallet is inserted into the machine tool. Note that the other indexed positions do not particularly require detection by LS and do not pose a problem in practice.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, a plurality of index positioning grooves 1a, 1b, 1c, and 1d are provided on the outer periphery of the turntable 5 (four locations in the figure). The index pin 2 is supported by the holder 4 so as to be removable and removable, and is configured to insert the head of the index pin 2 into the index positioning groove 1a etc. for index positioning. LS3 is placed relatively close to the index pin 2, and is secured by the flange 2a of the index pin 2.
It is configured to be turned on and off. Of the index positioning grooves 1a, 1b, 1c, and 1d, only the groove 1a is formed to have a deeper insertion depth than the others. That is, when the index pin 2 is inserted into the index positioning groove 1a, the insertion depth is such that the collar 2a presses the LS 3 into the ON state, as shown in FIG. On the other hand, the insertion depths of the other index positioning grooves 1b, 1c, and 1d are as shown in FIG.
The insertion depth is such that even when inserted into the LS 3, the flange 2a is located away from the LS 3, that is, in the OFF state.

The indexing positioning groove 1a is set at an indexing position corresponding to the indexing position at which the pallet 7 is moved in and out of the machine tool. Therefore, when the LS is ON in the ON-OFF operation, it means that the pallet 7 has come to the normal indexed position. Further, as described above, other index positioning grooves 1b, 1c,
At 1d, LS is OFF, so there is no risk of malfunction, and highly accurate indexing and positioning can be performed.

In this embodiment, only one of the index positioning grooves 1a, 1b etc. recessed in the outer periphery of the turntable is formed deeper than the others, and can be implemented very easily and at low cost. .

In this embodiment, LS3 and index pin 2 are ON-
Although the OFF structure is shown in the figure, it is of course not limited to this.

[Effect of idea]

As is clear from the above description, according to the present invention, it is possible to achieve the effect of detecting index positioning with high precision using extremely inexpensive and easily implemented means.

[Brief explanation of the drawing]

1 and 2 are plan views for explaining the structure and operation of an embodiment of the present invention, FIG. 3 is a side view of a conventional indexing positioning device, and FIG. 4 is a side view of a conventional indexing position detecting device. FIG. 2 is a partial plan view showing an outline. 1, 1a, 1b, 1c, 1d...index positioning groove, 2...index pin, 2a...flange part,
3, 3a... Limit switch (LS), 4... Holder, 5... Turntable, 6... Main shaft, 7...
... Palette, 8 ... Guide plate, 9 ... Roller member, 1
0... Dotsugu.

Claims (1)

[Scope of utility model registration request] The index pin inserted into the index positioning groove sets the insertion depth of one of the plurality of index positioning grooves recessed in the outer periphery of the rotating turntable on which the pallet is slidably mounted. 1. An indexing position detection device for a pallet changer turntable, characterized in that the groove is formed to a depth that allows the groove to operate, and the insertion depth of the groove at the other indexing position is formed to a shallow depth that turns a limit switch OFF.