JPS6031892Y2 - Palette changer - Google Patents

Description

[Detailed Description of the Invention] The present invention is a processing table (usually called a compound table) that is movably provided on the XZ plane of a machine tool.

) relates to a pallet changer that automatically loads and unloads pallets on top of the pallet.

A rotary continuous pallet changer is generally used as a conventional pallet changer for loading and unloading pallets on a compound table movable on an XZ plane.

This is because the compound table moves within the XZ plane, which causes interference between the shuttle guide and the table in the conventional shuttle system.

That is, the pallet changer could not be easily performed unless a stroke in a part of the processing area was used.

This one-sided rotary type has two arms that index and rotate by 180°, one of the two arms is located on the processing table side, and the other arm is located at the workpiece attachment and removal position.

After the processing of the workpiece is completed, the arm on which the processed workpiece is placed is transported onto the pallet changer arm indexed to the processing table side.

At this time, the workpiece material is placed on the other pallet changer arm, which is indexed to the workpiece attachment/removal position.

In this state, the pallet changer arm rotates, and the pallet on which the processed workpiece is placed is indexed to the workpiece attachment/removal position, while the pallet on which the workpiece material is placed is indexed to the processing table side.

Next, the workpiece material on the pallet changer arm is transferred onto the processing table, and one processed workpiece is replaced with a workpiece material.

Subsequently, when the processing of the workpiece transferred onto the processing table is completed, the processed workpiece placed on the pallet is moved to an exchange position close to the pallet changer by movement of the processing table.

The processed workpiece is then placed back onto the pallet changer arm.

In this method, the above-described operations are repeated sequentially to replace the pallet.

That is, the rotary continuous pallet changer described above takes time to change pallets.

In addition, since the pallet changer arm rotation device is provided on the side of the processing table of the machine tool, extra floor space is required, resulting in a complicated structure and high cost.

The present invention was devised in view of these problems, and includes shuttle table-type pallet changers provided on both sides of the processing table of a machining center.

That is, in order to shorten the pallet exchange time, both sides of the processing table are used as a first standby device and a second standby device, and in order to directly transfer the pallet to the processing table at the origin position, each first , the second standby device is provided with swing-type first and second conveyance paths, and a cover is provided on the back of each of the conveyance paths, and when the conveyance paths are oscillated and expanded,
It is an object of the present invention to provide a pallet changer in which the first and second standby devices are separated from the processing table side to ensure work safety during changeover of workpieces and protection from scattering of chips and coolant. .

Embodiments of the pallet changer of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a front view of a state in which the pallet changer of the present invention is installed on both sides of a processing table of a machine tool.

In the figure, 1 is a bed of a machine tool, and the bed 1
A carrier C is provided on the upper two guide surfaces so as to be slidable in the Z direction, and a saddle S is provided on the X guide surface of the carrier C.
is provided slidably in the X direction.

A processing table 2 is provided in the center of the saddle S,
On the processing table 2 is a pallet 4 on which a workpiece 3 is attached.
is placed.

Further, on the bed of the machine tool, a first pallet standby device M used as a pallet standby position is provided on the left side of the processing table 2, and a workpiece is placed on the first pallet standby device M. Pallet 7 with material 6 placed on it
is placed.

Furthermore, a second pallet standby device N is provided on the right side of the processing table 2 and is used as a pallet standby position to receive the workpiece 3 processed by the processing table 2.

Also, the two-dot chain line A9 shown in FIGS. 1 and 2.

C is the moving area of the processing table 2.

Next, the first movable conveyance path 5 will be explained with reference to a partially enlarged plan view of the left side surface of the processing table 2 shown in FIG.

That is, in FIG. 3, the rice cakes 12, 13 .
Two rails 10 and 10' constituting the first pallet standby device M are fixed in parallel on 14.

On the inner surfaces of the two rails 10.10', a plurality of rollers 11, 11' are mounted on shafts 15 provided parallel to the floor surface, facing each other at positions lower than the upper surface of the rails 10.10'. It is rotatably supported.

(FIG. 5) Furthermore, a support 16.16' is provided inside the rail 10° 10' on the casing 13 shown in FIG. Through hole 1
A bearing 18, 1B' is inserted into the inside of the bearing 7.

(FIG. 3) Both ends of a shaft 19 are rotatably supported by bearings 1B and 18' provided on the supports 16 and 16'.

(FIGS. 3 and 5) Further, the shaft 19 is inserted into a through hole 21, 21' provided at one end of the movable conveyance path 5, and the key 20
, 20'.

An arm 22 is engaged with the center of the shaft 19 via a key 23, and a notch groove 24 is provided at one end of the arm 22.

(Fig. 3) Also, the notch groove 2 provided in the arm 22
A through hole 25 is provided on both sides of 4, and a pin 26 is inserted into the through hole 25.

Further, a swinging member 27 is inserted into the notch groove 24 and swingably supported by the pin 26 .

On the other hand, a bracket 28 is fixed to the center of the scallop 13, and a cylinder 30 is swingably supported on the bracket 28 via a pin 29.

Furthermore, the tip of the piston rod 31 of the first movable conveyance path swing cylinder 30 is screwed onto one end of the swing member 27.

(Figs. 3 and 4) Also, as shown in Fig. 6, the processing table side and the first pallet standby device M are fixed covers 48, 4.
8' and 49, and a hole 50 is provided in the lower part of the fixed cover for the workpiece 6 placed on the table 7 to pass through.

That is, when the movable conveyance path swing cylinder 30 acts, the first movable conveyance path 5 swings about the axis 19 until it becomes perpendicular to the floor surface.

(Fig. 4) Due to this swinging, the fixed cover 48, 48'
, 49 are completely sealed from the processing table side by a cover 32 provided integrally on the back of the first movable conveyance path 5 (Fig. 6). The hole (not shown) in the fixed cover between the processing table side and the second pallet standby device N is also sealed as described above.

Furthermore, in FIGS. 3 and 5, on both sides of the first movable conveyance path 5, which is slidably provided around the shaft 19,
A plurality of shafts 33 are fixed parallel to the floor surface.

Furthermore, a roller 34 is attached to the shaft 33 to move the first movable conveyance path 5.
It is rotatably supported on a shaft in a state that protrudes slightly from the top surface of the .

That is, when the first movable conveyance path 5 swings until it becomes parallel to the floor surface due to the action of the cylinder 30, the pallet 7 moves along the rollers 3.
It is supported by 4 and moves.

On the other hand, in FIG. 3, a pallet conveyance cylinder 37 is slidably supported on a bracket 35 fixed on the base 1 via a pin 36 in parallel to the first movable conveyance path 5.

Further, a guide bar 38 is provided in parallel on the side surface of the pallet conveyance cylinder 37 on the first movable conveyance path 5 side, and one end of the guide bar extends to the side surface of the second pallet standby device N.

(FIGS. 2 and 3) Furthermore, a connecting member (hereinafter referred to as a tube material 39) is fitted into the guide bar 38 so as to be slidable in the axial direction, and locking bodies 40, 40' are provided at both ends of the tube material 39. are provided in parallel toward the pallets 4 and 7.

(FIG. 3) A limit switch 41 is provided on the base 1 at the end of the guide bar 38 to confirm the position of the pallet 7 in the first pallet standby device M.

(FIG. 3) Further, as shown in FIG. 1, the guide bar 38
A limit switch 41' provided at the other end confirms the position of the pallet 4 that has arrived at the second pallet standby device N.

On the other hand, as shown in FIGS. 3 and 5, L-shaped locking members 42 and 42' are fixed to the side surfaces of the pallets 4 and 7 on the side of the guide bar 38, and the L-shaped locking members have cutouts that penetrate vertically. A notch groove 43 is provided.

Furthermore, as shown in FIG.
Locking bodies 40 and 40' provided at both ends of the holder 9 are engaged with each other.

An L-shaped port 45 is provided on the side surface of the end of the tube 39 on the pallet 4 side, and a piston rod 44 of the pallet conveying cylinder 39 is screwed into the L-shaped support 45.

The first movable conveyance path 5 has been described above, but the second movable conveyance path 8 has the same structure as the first movable conveyance path 5, and is configured symmetrically with respect to the processing table 2 in the center. .

(FIGS. 2 and 3) That is, when the machining of the workpiece 3 placed on the pallet 4 on the machining table 2 is completed, the table 2 returns to its origin.

Next, the first and second
The movable conveyance paths 5 and 8 are movable conveyance path swing cylinders 30.3.
0', they swing until they become horizontal to the floor surface and communicate with the processing table 2, respectively.

At this time, the tip of each of the movable conveyance paths 5 and 8 is connected to the support 4.
Supported by 7.

(FIG. 4) The above is an embodiment of the present invention, and its operation will be explained next.

The machining table 2 located in the center of the bed of the machine tool is provided so as to be movable in the XZ direction by tape commands, as shown by two-dot chain lines a and b in FIGS. 1 and 2.

In Fig. 1, the processing table 2 is located in the center of the bed 1.
When the machining of the workpiece 3 placed on the upper pallet 4 is completed, the machining table 2 returns to its original position.

(FIGS. 2 and 3) Subsequently, after the processing table 2 returned to the origin, it was clamped on the processing table 2.
When the pallet 4 is unclamped, the processing table 4 will float slightly.

Due to this floating, the locking member 42 provided on the side surface of the pallet 4 and the locking body 40 provided at the end of the tube material 39 engage with each other.

(Figures 3 and 5) At the floating sign of the pallet,
The first. The second movable conveyance paths 5 and 8 are movable conveyance path swing cylinders 30, 30.
', and are in contact with the processing table 2, respectively.

(Fig. 4) At this time, as shown in Fig. 6, the cover 32
The hole 50, which was previously sealed, opens under the action of the cylinder 30, 30'.

Next, the cylinder 37 for pallet conveyance
The piston rod 44 moves to the right, and the tube 39 moves to the right through the L-shaped port 45 and is guided by the guide bar 38.

(Figures 2 and 3) When moving to the right, until now the rollers 11 of rails 10 and 10'
, 11', on which the workpiece material 6 is placed, moves to the right on the floors 11, 11' toward the processing table 2.

Furthermore, the lateral movement of said pallet 7 is controlled by the rails 10.1
0' is regulated on the inside of the upper surface, and on the first movable conveyance path 5, it is regulated on the inner surfaces of the guide plates 46, 47.

(Fig. 5) That is, the pallet 7 on which the workpiece material 6 is placed is on the processing table 2, and the pallet 4 on which the workpiece 3 processed on the processing table 2 is placed on the second pallet standby position N. move respectively.

As a result of this movement, when each of the pallets 4 and 7 reaches the moving end, a signal from a limit switch 4F provided on the second pallet standby device N side at the end of the guide bar 38 is activated.

(Fig. 2) With the sign of this limit switch 41', each movable conveyance path 5, 8, which has been in a horizontal state until now, becomes perpendicular to the floor surface by the action of the movable conveyance path swing cylinder 30, 30'. oscillate.

At this time, the cover 32 integrally provided on the back of each movable conveyance path swings together with the movable conveyance paths 5 and 8 until it becomes perpendicular to the floor surface, and is separated from the processing table 2.

(FIG. 6) That is, the work passage hole 50 of the fixed cover that partitions the processing table 2 and each of the first and second pallet standby devices M and N on both sides thereof is connected to the cover 3 at the back of each transport path.
2 is completely sealed.

In this state, the processed workpiece 3 on the pallet 4 moved onto the second pallet standby position N is replaced with a workpiece material.

Therefore, while machining a workpiece on the machining table 2, the first . It is possible to prevent chips and coolant from flying into the second pallet standby device.

Furthermore, while a workpiece is being processed on the processing table 2, workpieces on other pallets can be mounted and removed safely without any hindrance.

Furthermore, the pallet changer of the present invention is more effective in shortening pallet exchange time than conventional rotary one-type pallet changers.

As stated above, the present invention is not limited to the configuration shown in the embodiments, and modifications are expected without departing from the technical idea of the present invention as described in the claims. .

[Brief explanation of the drawing]

Figure 1 is 1. A front view of the pallet changer showing a state in which the second movable conveyance path is open, FIG. 2 is a plan view of FIG. 1,
FIG. 3 is a partially enlarged plan view showing the first table in a collapsed state, FIG. 4 is a cross-sectional view taken along line B-B in FIG. 3, and FIG. 5 is a cross-sectional view taken along line A-A in FIG. FIG. 6 is a perspective view showing a state in which the first movable conveyance path is open. In the figure, 1...Bed, 2...Processing table, 3...Work, 4...Pallet, 5...First Movable conveyance path, 6...
...Work material, 7... Palette, 8...
...Second movable conveyance path, 30, 30'...Movable conveyance path swing cylinder, 32...Cover, 37.
...Cylinder for pallet transport, 38...
Guide bar, 40, 40'... Locking body, 42.
42'...L-shaped locking member, 48, 48', 49
...Fixed cover, 50 ... Hole, A99
B, C...table movement area, C...carriage, M...first pallet standby device,
N...Second pallet standby device, S...
·saddle.

Claims (1)

[Scope of utility model registration request] a base, a processing table movably provided on the plane of two axes perpendicular to the base, and first and second pallet standby devices provided on both sides of the movement range of one axis of the processing table. and the first and second pallet standby devices are provided in the plane of the two axes perpendicular to the processing table and are swingable about an axis perpendicular to the one axis. first and second conveyance paths, a connecting member movable parallel to the one axis, a cover provided on the back of the first and second conveyance paths, and the first and second conveyance paths. a drive source for swinging the path; and a locking body that engages with the pallet and is attached to the connecting member to transfer the pallet between the first standby device and the processing table or the processing table and the second standby device. and a drive source for moving the connecting member, and while the processing table is being processed, the first and second conveyance paths are brought out only when replacing the pallet to guide the pallet. Palette changer.