JPS59232742A - Pallete replacing device - Google Patents

Abstract

PURPOSE:To make it possible to perform the simultaneous changing of palletes to shorten the changing time of the palletes and as well to enhance the activity rate of a machining center, by constituting a pallet pool in a vertical type in which a plurality of palletes are removably stored onto an endless chain at equal pitches. CONSTITUTION:In a machining center 10, a machine table 15 is set on a bed 16, movably in the horizontal direction, and an indexing table 17 is mounted on the machining table 15 so that it may be rotated and indexed. An endless chain 24 is stretched between sprockets 22, 23 at both ends of a machine bed 21 provided on a pallete table 1, and a plurality of base beds 25 are attached at equal pitches to the endless chain 24. A pallete 20 is slidably engaged with and held on a guide rail 26 on each base bed 25, and a pallete turning device 12 is provided with a machine bed 31 disposed between a pallete changing position CP in a pool 11 and the table 15. A workpiece may be set on and removed from a pallete 20 staying in the operator's position.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a pallet exchange device for exchanging pallets between a machine table and a valet boule.

<Prior Art> A pallet exchange device that exchanges a bar between a machine table and a pallet pool in which a plurality of pallets are stored in a circulating manner is known. Since the pallet is circulated along a horizontal track, it requires a considerable amount of floor space, and there are problems in that it is difficult for workers to access the valet exchange position.

Moreover, in conventional pallet exchange equipment, when directly exchanging pallets, the used barrel throat is first returned from the machine table to an empty storage position in the pallet pool, and then the barrel l- to be used for fire is replaced. index to the position,
Since this pallet is carried into the machine table from the pallet, l/pool, it takes a considerable amount of time to exchange the pallet, and especially in a pallet pool with a random call method, there is a problem that the exchange time becomes even longer. be.

<Objective of the Invention> An object of the present invention is to provide a pallet exchanging device that makes it possible to reduce the floor area occupied by a pallet pool and shorten the pallet exchanging time.

<Structure of the Invention> In order to achieve the above object, the present invention has a pallet pool in which a plurality of pallets can be attached and detached at equal pitch intervals on an endless chain that is stretched between two parallel axes in a horizontal plane and driven in rotation. It is constructed in a three-dimensional shape and is equipped with a pallet rotating device that simultaneously exchanges both pallets between the pallet pool and the machine table.

<Example> Embodiments of the present invention will be described below based on the drawings.

1 and 2, 10 is a machining center, 11 is a three-dimensional barrel 1-pool, and 12 is a pallet rotating device. Machine table 1 of machining center 1o
5 is placed horizontally movably on a bed 16, and an index table 17 is mounted on this machine table so as to be rotatably indexable.

An arc-shaped clamper 18 is mounted on the indexing table 17 so as to be movable up and down, and the pallet 20, which is engaged with the clamper 18 in a 2n movement F'J function, is positioned and clamped on the indexing table 17 by lowering the clamper 18. and is asoclamped by increasing 1. On the machine chiffle I5 are arc-shaped guide rails 1 aligned with both sides of the clamper 18.
9 has been installed.

Thus, the machine table 15 is positioned at a fixed position when replacing the barrel 1.

The pallet pool 11 is connected to the If of the machine table 15.
The machine includes a machine stand 21 installed along the moving direction, and this one stand 21 is configured to have approximately the same height as the machine table 15. Sprockets 22 and 23 are rotatably supported around a horizontal axis at both ends of the machine base 21 which are spaced apart in the horizontal direction, and an endless chain 24 is passed between these sprockets 1 and 22 and 23. ing. The endless chain 24 has a plurality of bases 25 as shown in FIG.
are mounted at equal pitch intervals, and arc-shaped guide rails 26 are formed on these bases 25 to guide the windows.
- A pallet 20 is slidably engaged and held in the lever 26. It should be noted that the pallet 20 is positioned on the guide rail 26 by the 1b pin.

An indexing drive motor 27 is connected to one of the sprockets 22, and this indexing drive motor 27 drives the pallet 20 together with the endless chain 24 in a vertical plane to move each baren 20 to the pallet corresponding to the machine table 15. The exchange positions cp are sequentially indexed.

The pallet 2o is constructed by removably fitting and fixing an adapter 220 having an arcuate guide groove 220a into a linear guide groove 12oa formed in the standard pallet 12°. It is adapted to be slidably engaged with the clamper 18, guide rail 26, etc.

The pallet turning device 12 includes a machine stand 31 installed between the pallet exchange position CP of the pallet pool I and the machine chiffle I5, and a support stand 32 is installed on this machine stand 31. A rotary shaft 33 is rotatably supported on the shaft 32 about a vertical axis. A swing drive plate 34 is fixed to the upper end of the rotating shaft 33, and linear retaining grooves 35 are formed in parallel to each other on both sides of the lower end of the swing drive plate 34, as shown in FIGS. 3 and 4. .

An engagement block 36 fixed to the side surface of the pallet 20 is slidably engaged with the engagement groove 35. A gear 37 is formed on the rotating shaft 33, and this gear 37 is connected to a swing drive motor 38 installed on the machine base 31.
The rotation drive plate 34 is meshed with a gear 39 connected to the rotation drive plate 34 by 180° by driving the rotation drive motor 38.
It is designed to rotate and roll. Further, an arc-shaped guide rail 40 is installed on the machine stand 31.

When the machine table 15 is positioned in place for replacement, the machine table 15
Upper clamper 18. The guide rail 19, the guide rail 26 on the base 25 indexed to the pallet exchange position CP, and the second guide rail 40 of the machine base 31 are used to rotate the rotation center of the swing drive plate 34 (rotation shaft 33). A circular orbit for feeding the baresque is constructed.

Next, a pallet exchange operation in the above configuration will be explained. In the following invention, it is assumed that an identification code is given to the pallet 20 so that a plurality of barre throats 20 stored in the bullet pool 11 can be called up at random.

While a workpiece mounted on a pallet 2o on the machine table 15 is being processed by the machining center 1o, the endless chain 24 of the pallet pool 11 is rotated to move the required pallet to be carried onto the machine table 15 next. 20 is positioned at the pallet exchange position CP, and the engagement block 3G of this pallet 20 is engaged with one engagement groove 35 of the swing drive plate 34. The pallet 20 then stands by in that state. machine table 1
When the predetermined machining of the workpiece on 5 is completed, the machine table 15 is positioned at a fixed position for replacing the bullet.
A circular orbit centered on the rotating shaft 33 is formed by the clamper 18 and guide rail 19 on the machine table 15, the guide rail 40 on the machine stand 31, and the guide rail 26 at the pallet exchange position CP.

Once the machine table 15 is positioned at a fixed position,
A pallet exchange command is issued, and based on this command, the clamper 18 is raised by a predetermined amount to unclamp the pallet 20, and thereby the engagement block 36 of the pallet 20 is
is engaged with the other engagement groove 35 of the swing drive plate 34. On the other hand, at the pallet exchange position CP, the actuator of the circuit installed there removes the dowel pins Mli from the barrels 1 to 20, and the pallet 20
allows sliding. Subsequently, the swing drive motor 38 is activated to swing the swing drive plate 34 in a horizontal plane, whereby the ballens I.20 engaged with both engagement grooves 35 are integrated with the swing drive plate 34 along the circular orbit. is rotated. When the swing drive plate 134 is driven to swing by 180 degrees, the Pare Soto 2 located on the machine table 15''
0 is engaged with and held by the guide rail 26 of the pallet exchange position CP of the valet pool 1, and is also held at the pallet exchange position C.
The pallet 20 located at P is engaged and attached to the clamper 18 on the second machine table 15J. Thereafter, the clamper 18 is lowered to position and clamp the pallet 2o on the machine table 15, and in conjunction with this, the engagement block 36 of the pallet 20 is disengaged from the engagement groove 35 of the swing drive plate 34. Thereafter, the machine table 15 is moved to process the workpiece on the balent 2o, and the pallet pool 1
1, the endless chain 240 starts rotating in order to index the pallet 20 to be next carried onto the machine table 15 to the pallet exchange position CP.

By using such a bullet pool 11, if workpieces are placed on a plurality of pallets 2o in advance, unmanned operation becomes possible.

However, the three-dimensional palette Boolean 1 with the above configuration
1 can increase the worker's accessibility to the pallet exchange position CP, and therefore, at the worker position MP (Fig. 1), the operator can move the pallet l-
It is now possible to attach and detach a workpiece to and from the 20, and it can also be used as a normal valence checker without activating the valence pool 11.

In the above-described embodiment, the barren 1-20 is rotated along a circular trajectory while being guided by the rail, but if the weight of the pallet 20 is supported by the bullet rotating device 12, the guide rail It is also possible to rotate the pallet 20 without it.

<Effects of the Invention> As stated above, in the present invention, pallets can be exchanged between the machine table and the pallet pool at the same time using the pallet turning device, so the time required for changing the pallets is reduced compared to the conventional system. This has the effect of significantly shortening the time and improving the machine operating rate.

Moreover, in the present invention, since the pallet pool is configured in a three-dimensional shape, the floor area occupied by the baren 1 pool can be significantly reduced, and there is also the effect of increasing the accessibility of the operator to the pallet exchange position. It's played~U is played.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the valet exchange device, FIG. 2 is a view seen from the direction ■ in FIG. 1, and FIG. FIG. 4 is an enlarged cross-sectional view taken along the line IV--IV in FIG. 3. DESCRIPTION OF SYMBOLS 10... Machining center, 11... Bullet pool, 12... Bullet turning device, 15... Machine table, 2o... Bullet, 24... Endless chain, 34... Turning drive plate, 38 ...Swivel drive motor. Patent applicant Toyota Machinery Co., Ltd.

Claims (1)

[Claims] (11 In machines where pallets are exchanged between a machine table such as a machining center and a pallet pool installed on the front side of this machine table, the pallet pool is stretched between two parallel axes in a horizontal plane and revolves around it. It has a three-dimensional structure in which a plurality of pallets are removably stored at equal pinch intervals on a driven endless chain, and both pallets are connected between the machine table and the pallet pool between the pallet exchange position of the pallet pool and the machine table. 1. A bullet exchange device characterized in that a swivel device is provided for simultaneously exchanging a barrel 1 and a swivel device.