JPH0663802A - Shutter for loader in nc lathe - Google Patents

Abstract

PURPOSE:To reduce a loading time by saving a time for opening and closing a shutter when an NC lathe is loaded and a waiting time of a loader for ascertaining the opening and closing of the shutter by a sensor. CONSTITUTION:Shutters 2 and 2 are axially supported on a cover 1 by hinges 4 and 4 so that the shutters can be prevented from rotating upwardly from a substantial horizontal plane but can rotate only downward. The shafts of the hinges 4 and 4 are provided with coil springs 5 and 5, and the coil springs 5 and 5 give the shutters 2 and 2 an upward energizing force, whereby an opening 1A of the cover 1 is usually closed. A loader 3 which descends when it is loaded forcefully opens the shutters 2 and 2 against the energizing force, and enters the cover 1. Having performed loading operations, the loader 3 is elevated and returns to its original position. The elevation of the loader 3 is accompanied by the simultaneous closing of the shutters 2 and 2 while the shutters come into contact with the loader 3 because of the energizing force of the coil spring 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loader shutter for an NC lathe, which can shorten the loading time.

[0002]

2. Description of the Related Art In an NC lathe, when a work is attached and detached by using a loader, it is necessary to open a cover or a shutter which is a part of the cover covering a processing portion to allow the loader and the work to pass through. .

Therefore, in the mechanism using the shutter,
First, the shutter is opened in the horizontal direction by an actuator such as an air cylinder, and after confirming that the shutter is opened by a sensor, the loader is lowered to attach and detach the work. Next, raise the loader to return it to its original position,
The shutter is closed, the sensor is used again to confirm that the shutter is closed, and the machine is restarted.

Therefore, in the conventional construction, during the time required for the loading operation, the time for opening / closing the shutter and the time for confirming the opening / closing by the sensor are added as the waiting time of the loader.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the fact that the waiting time causes a loss of loading time.
This time is omitted to reduce the loading time.

[0006]

The loader shutter of the present invention is prevented from pivoting upward from a substantially horizontal plane, is rotatably supported only downward, and is given an upward biasing force. The shutter is pushed down by the lower pressure of the loader against the biasing force and is closed by the biasing force of the loader ascending.

[0007]

The shutter of the present invention is prevented from pivoting upward from a substantially horizontal plane and is given an upward biasing force. Therefore, in normal times, the shutter is located on a substantially horizontal plane and is in a closed state. ing. However, when the loader descends vertically downward during loading, it presses the shutter and pushes in against the urging force to enter while opening.

When loading is completed and the loader rises, the upward biasing force, that is, the shutter closing force acts on the shutter by its own upward biasing force while contacting the loader. The shutter closes automatically when the loader rises above the horizontal surface of the shutter.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The drawing is a partially longitudinal front view showing a shutter portion of a cover, and a cover 1 is provided with a window 1A.
A is blocked by two shutters 2 and 2. Further, the loader 3 is located above the window 1A.

The shutters 2 and 2 are rotatably attached to the cover 1 by hinges 4 and 4, and the hinges 4 and 4 allow the shutters 2 and 2 to rotate only below a substantially horizontal plane. Further, coil springs 5 and 5 are wound around the shafts of the hinges 4 and 4 to apply upward biasing force to the hinges 4 and 4. Therefore, the shutters 2 and 2 attached to one side of the hinges 4 and 4 are normally in a horizontal position, and when pressed down from above, they rotate downward against the biasing force of the coil springs 5 and 5. The window 1A is opened, but if the lower pressure is lost, the coil springs 5 and 5 automatically return to the horizontal position to close the window 1A.

On the other hand, the loader 3 located above the window 1A descends to attach and detach the work to be mounted on the spindle 7. Then, when descending, the shutters 2, 2
The shutters 2 are rotated downward to open the window 1A, and the loader 3 is closed by the shutters 2 and 2.
When the loader performs the loading operation with the button pushed open, the shutters 2 and 2 close the window 1A by the action of the coil springs 5 and 5 while contacting the loader 3, and the shutter of the finger 3A of the loader. A push-open cover 6 is provided on the lower end and the side surface which are in contact with
Is provided.

[0012]

As described above, according to the present invention, since the shutter can be rotated downward and the upward biasing force is applied, when the loader descends, it is opened by the lower pressure,
As the loader returns, it is closed by the urging force of the shutter. Therefore, there is no need to wait for opening and closing the shutter and checking the sensor as in the past.
It has the effect of shortening the loading time.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Cover 1A Window 2 Shutter 3 Loader 4 Hinge 5 Coil Spring 6 Push Open Cover 7 Spindle

Claims (1)

[Claims] 1. Rotation upward from a substantially horizontal plane is prevented,
To open a shutter pivotally supported only downward and to which an upward biasing force is applied against the biasing force by lowering the loader downward pressure, and closing the shutter with the biasing force when the loader rises. Shutter for loaders on NC lathes featuring.