JPS646190Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is a work pallet changing device for a machine tool that rotates the pallet support frame around the horizontal axis to change the work pallet supported on the pallet support frame. It belongs to the technical field of a type in which the workpiece can be switched between an upward pallet exchange position and a downward chip dropping position, and relates to a technique for loading work pallets onto a pallet support frame.

In this technical field, in order to prevent the work pallet from falling from the downward chip drop position, the pallet is suspended from the pallet support frame via the engagement between an upwardly expanding suspension device and a deeply expanding suspended groove.

<Prior Art> Conventionally, there is a technique described in Japanese Patent Application Laid-open No. 192733/1983. In this structure, as shown in FIG. 6, the hanging tool 31 of the pallet support frame 30 is formed to be long over the entire length in the fitting and sliding direction with the suspended groove 33 of the work pallet 32.

<Problems to be solved by the invention> With this structure, when loading the work pallet 32 into the pallet support frame 30, the suspended groove 33 must be fitted into the lifting tool 31 from the end, so the following problems are solved. There are some drawbacks.

(b) When lifting a heavy work pallet using a cleaner, etc., and fitting the hoisting groove into the hoisting tool, the work pallet must be moved carefully and repeatedly while being subtly adjusted up and down and left and right; It is difficult to fit together due to lack of movement and slippage, which is time consuming and inefficient.

Moreover, since the work pallet is not lifted outside the pallet support frame, there is a risk that the work pallet will fall while it takes time to fit the pallets together.

Furthermore, as a space for loading the work pallets, a dead space with a dimension longer than the length of the work pallets is required outside the pallet support frame.

The present invention solves the above-mentioned drawbacks by making it possible to fit the suspension groove and the suspension tool simply by placing the work pallet on the pallet support frame. B. C. The purpose is to eliminate.

<Means for solving the problem> In order to achieve the above object, the present invention provides a hanging tool partially in the middle of the suspended T-groove in the sliding direction,
A lifting hole is formed in the middle of the suspended T-groove in the length direction, and when the work pallet is placed on the pallet support surface, the head of the lifting tool is inserted into the lifting hole. It is characterized by being configured so that it passes through and fits into the wide part of the suspended T-groove.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is an exploded perspective view of a pallet support surface and a work pallet placed thereon, and FIG. 2 is a side view of the machine tool.

In the figure, reference numeral 1 indicates a machine tool, and a work pallet exchange device 3 is provided in front of a table 2 of the machine tool 1.

This work pallet exchange device 3 has horizontal horizontal shafts 5 projecting outward from both ends of a pallet support frame 4 that are pivoted on a base frame 6, and rotates the pallet support frame 4 upward around the axis of the horizontal shaft 5. It is designed so that it can be switched between a replacement position A and a downward chip dropping position B.

A chip processing device 7 is provided at the lower part of the base frame 6 which pivotally supports the horizontal shaft 5 of the pallet support frame 4.

After being machined on the machining table 2 of the machine tool 1, the chip processing device 7 removes the chips attached to the workpiece pallet 8, on which the machined workpiece 9 is fixed, at a chip fall position B when the pallet support frame 4 is reversed. In order to treat the powder, air is blown from the nozzle 10 toward the workpiece 9.

Pallet support surfaces 11 are formed on the upper and lower surfaces of the pallet support frame 4, respectively, and each pallet support surface 11 has a running guide rail 12, a T-shaped hanging tool 1, etc.
3. A stopper 14 and a positioning stopper 15 are provided.

Under normal conditions, the stopper 14 protrudes from the pallet support surface 11 and engages with a locking hole 16 formed in the lower surface 8a of the work pallet 8, and is released from the engagement by operating a stop release operating tool 17 provided on the base frame 6. It is becoming more and more like this. A work pallet fixing device 18 is constituted by the hanging tool 13 and the stop tool 14. In addition, the reference numeral 19 in the figure is a rotation locking device for the pallet support frame 4, and the hanging tool 13 and the positioning stopper 15 have a short cylindrical post 20 erected on the pallet support surface 11, and the head of this post 20 A disc-shaped flange 21 is integrally formed with the flange 21 to have a T-shaped cross section. be.

On the other hand, on the lower surface 8a of the work pallet 8, a wheel mounting groove 22 is formed in a portion of the pallet support surface 11 corresponding to the running guide rail 12, and a suspended holding groove 23 formed as a T-groove is formed in a portion corresponding to the lifting tool 13. are formed so as to run in front and behind the work pallet 8, respectively.

The wheel 24 attached to the wheel attachment groove 22 is the fourth wheel.
As shown in the figure, a bearing is rotatably supported on a steel section 25 having a U-shaped cross section, and the lower end of the wheel 24 is located in the middle of the wheel mounting groove 22, The wheel mounting groove 22 below the lower end of the wheel mounting groove 24 is formed into a guide groove 26 into which the travel guide rail 12 of the pallet support surface 11 is fitted and slides and guides the work pallet 8 (see FIG. 4).

Further, in the suspended T-groove 23 formed as a T-groove on the lower surface 8a of the work pallet 8, a lifting tool depression hole 27 into which the lifting tool 13 formed protruding from the pallet support surface 11 is inserted is located halfway. (See Figures 3 and 4).

The operation of attaching and detaching the work pallet 8 to and from the pallet support frame 4 constructed as described above will now be described.

In order to attach the work pallet 8 to the pallet support surface 11, the work pallet 8 is placed from above the pallet support surface 11, and the hanging tool 13 and the suspended tool 13 are inserted into the hanging tool provided in the suspended T-groove 23. After placing the workpiece pallet 8 facing the hole 27, when the workpiece pallet 8 is slid until it comes into contact with the positioning stopper 15, it engages with the T-shaped hanging T-slot 23 and the stopper 14 moves into the locking hole 16. , thereby securing the work pallet 8 in the correct position on the pallet support surface 11.

In this way, when the fixed work pallet 8 rotates from the upward work pallet exchange position A to the downward chip dropping position B, the T-shaped hanging fixture 13 suspends the suspended T-groove 23, and the stop fixture 14 The workpiece pallet 8 is prevented from moving by engaging with the locking hole 16.

Next, the work pallet 8 is placed on the pallet support surface 11.
When moving from table 2 of machine tool 1,
After operating the stopper 14 in the upward work pallet exchange position A with the stop release operation tool 17, the work pallet 8 is slid onto the table 2.

Also, the work pallet 8 is placed on the pallet support surface 11.
To remove it from above, release the engagement between the stopper 14 and the locking hole 16 using the stop release operating tool 17, slide the workpiece pallet 8, and remove the T-shaped lifting tool 13 and the suspended T.
The work pallet 8 can be removed from the pallet support surface 11 by aligning the groove 23 with the suspension hole 27 formed in the groove 23 and lifting the work pallet 8 upward.

In addition, what is shown in FIG. 5 shows another embodiment.
The peripheral wall 27a of No. 7 is formed into a narrow tapered shape, and in this case, the hanging tool 13 can be easily fitted.

<effect> The present invention has the following effects.

(b) Even when fitting the hoisting groove to the hoisting tool while hoisting a heavy work pallet with a crane, etc., the hoisting tool can be attached by simply sliding the workpiece pallet after placing the work pallet on the pallet support surface. Since the suspension tool is engaged with the suspended groove through the recessed hole, the work pallet can be easily attached to and removed from the pallet support surface, greatly improving work efficiency.

(b) Since the work pallet attachment/detachment operation is performed above the pallet support surface, even if a work pallet lifted by a crane should come off the crane and fall, it will be caught on the pallet support surface with an extremely small drop. , almost eliminates accidents caused by falls.

(c) Since the work pallets are attached and detached on the pallet support surface, there is no need to provide a dead space outside the pallet support frame, increasing the utilization rate of the surrounding space.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being an exploded perspective view of the pallet support frame and work pallet, Figure 2 being a schematic side view of the machine tool, and Figure 3 being a longitudinal section of the main parts. The side view, FIG. 4 is a sectional view taken along the line -- in FIG. 3, FIG. 5 is a view corresponding to FIG. 4 of another embodiment, and FIG. 6 is an exploded perspective view of main parts of the conventional example. 4... Support frame, 6... Base frame, 8... Work pallet, 11... Pallet support surface, 13... T-shaped hanging fixture, 14... Stopping tool, 16... Part to be stopped, 18
. . . Work pallet fixing device, 19 . . . Rotation locking device, 23 .

Claims (1)

[Scope of utility model registration request] The pallet support frame 4 is rotatably supported on the base frame 6 around a horizontal axis, and the rotation lock device 1
9, the pallet support frame 4
A pallet support surface 11 is provided at multiple locations in the circumferential direction of the circumferential surface of the pallet.
is provided, and each pallet support surface 11 is configured to be switchable between an upward pallet exchange position A and a downward chip drop position B by the rotation and rotation lock of the pallet support frame 4. A shaped hanging tool 13 is provided, a deep-widening suspended T-groove 23 is provided on the lower surface of the work pallet 8, and the suspended T-groove 23 is slidably fitted into and engaged with the T-shaped hanging tool 13. Accordingly, in a work pallet changing device that rotates around a horizontal axis of a machine tool and is configured to be able to suspend a work pallet 8 on a pallet support surface 11 at a downward chip falling position B, the lifting tool 13 is moved to the suspended T-groove 23. A suspension hole 2 is provided partially in the middle of the sliding direction, and a suspension hole 2 is provided in the middle of the suspended T groove 23 in the length direction.
7 is formed, and with the work pallet 8 placed on the pallet support surface 11, the head of the lifting tool 13 passes through the lifting tool recess hole 27 and is inserted into the suspended T-groove 23.
A workpiece pallet changing device for rotating around a horizontal axis of a machine tool, characterized in that it is configured to fit into a wide part of a machine tool.