JPH0123264B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dust prevention device applied to machine tools, particularly vertical lathes.

(Prior Art) When a workpiece is fixed on a rotary table and cut using a vertical lathe, chips and coolant are scattered around the table due to centrifugal force caused by the rotation of the rotary table.

Therefore, to prevent chips and coolant from scattering,
In order to prevent danger, a cylindrical enclosure wall is usually provided surrounding the rotary table, and a door is attached to a part of the enclosure wall with an opening for the entry of workers and the loading and unloading of workpieces. Work is performed with the door closed.

(Problem to be Solved by the Invention) However, the door of this type of conventional dust-proof device is a so-called sliding door type that opens sideways, and chips that fall against this door during work are left behind. The door is configured to be opened and closed inside the enclosure wall, that is, within the chip recovery groove, along the enclosure wall so as to fall into the collection groove.

As mentioned above, in the case of a door that opens laterally in an overlapping manner along the inner surface of the enclosure wall, the sliding part is inevitably long due to its structure, and since this is on the chip collection groove side, the door When opening/closing, there is a large barrier that makes it difficult to operate, and chips often get caught in the sliding parts, making the opening/closing operation itself impossible and causing serious hindrance to work. I have often experienced that the existence of a dust control device is treated as a nuisance.

In addition, some dust control devices are equipped with a door that can be opened and closed outward, but when the door is closed, the door runs along the outside of the enclosure wall outside the open part of the enclosure wall. Since the chips and coolant that are scattered during the cutting process descend along the inner surface of the door, they leak outside through the gap with the outer surface of the enclosure wall, significantly impairing work efficiency and reducing safety. Therefore, it may not be able to fully demonstrate its function as a dustproof door.

This invention was made in view of the above points, and improves the door that forms part of the enclosure wall so that the chips and coolant that are scattered during the cutting process are reliably guided and dropped into the chip collection groove. The purpose of the present invention is to provide a dustproof device for machine tools that is easy to operate and exhibits stable functions over a long period of time.

(Means for Solving the Problems) The gist of the present invention for achieving the above object is to provide a chip collection groove around a machine tool, and extend the outer wall of the chip collection groove upward to form an enclosure wall. In a dust prevention device for a machine tool, in which chips that fall into a chip collecting groove are collected via a rotating bottom disposed in the groove, an open part is provided in a part of the enclosing wall. A door is provided in the open part so that it can be opened laterally toward the outside, and an inner door is disposed inside the door so as to be movable up and down in conjunction with a lifting means, and when the door is opened, the inner door is raised. to position the lower edge of the inner door above the wall edge of the chip collection groove, and when the door is closed, lower the inner door into the chip collection groove so that the lower edge of the inner door overlaps the edge of the chip collection groove wall from the inside. There is provided a dustproof device for a machine tool, characterized in that it is configured to be locked.

(Function) In the above configuration, when the door is closed and the inner door is lowered, the lower edge of the inner door overlaps and locks against the edge of the chip collection groove wall from the inside in the chip collection groove, and the enclosing wall As part of this function, all the chips that fly off the rotary table due to cutting are guided to fall into the chip collection groove, so there is no leakage to the outside.

When the inner door is raised when opening the door, the lower edge of the inner door is located above the wall edge of the chip collection groove, so that the opening and closing movement of the door is not obstructed.

(Example) Hereinafter, an example in which the present invention is applied to a vertical lathe will be described based on the drawings.

FIG. 1 is a perspective view of the main part, FIG. 2 is a longitudinal sectional view of the main part, and FIG. 3 is a sectional view taken along line AA in FIG. 2.

In the figure, reference numeral 1 denotes a rotary table, on which a workpiece A is fixed. A chip collection groove 2 is provided surrounding the entire circumference of the table, and inside this chip collection groove 2 there is a rotating inner bottom 2a for discharging chips to the outside.
Equipped with. An enclosing wall 3 is provided by extending the outer wall of the chip collecting groove 2 upward, and an open part 4 is provided in a part of the enclosing wall 3. In this open part 4, a door 5 is attached to the enclosure wall 3 using a hinge 6 so as to be freely openable and closable toward the outside, and this door 5 functions as a part of the enclosure wall 3 in a closed state.

A space 7 is formed between the door 5 and the inner lower part of the door 5, and the upper part of the cover plate 8 is attached to the inner space 7 of the cover plate 8. An inner door 11 having an inner door 11 is arranged to be vertically movable, and its lower edge 11a faces the edge of the chip collection groove wall inside the enclosure wall 3.

Reference numeral 9 denotes an elevating mechanism linked to the inner door 11 within the space 7. This elevating mechanism 9 holds the inner door 11 so as to be movable up and down with respect to a holding plate 10 provided at the lower end of the cover plate 8. A spring 1 is interposed between the inner door 11 and the inner door 11 and constantly biases the inner door 11 upward.
2, and a cam 14 attached to a cam shaft supported through the door 5 and engaged with the upper part of the inner door 11 within the space 7.
and a handle 13 attached to a camshaft outside the door 5.

In the above configuration, when the inner door 11 is pushed down against the spring 12 via the cam 14 by operating the handle 13 of the elevating mechanism 9 with the door 5 closed, the lower edge 11a of the inner door will tip. In the recovery groove 2, the groove wall edge is overlapped and locked from the inside.

In this state, chips flying from above the rotary table 1 and hitting the inner surface of the door 5 are guided to fall into the chip collection groove 2 and are discharged to the outside via the rotating midsole 2a.

When opening the door 5, when the handle 13 is operated to release the pressure on the inner door 11 via the cam 14, the inner door 11 is raised by the upward force of the spring 12, and its lower edge 11a is used to collect chips. It is located above the edge of the groove wall and allows the door 5 to be opened and closed freely.

In the above embodiment, the inner door is arranged to be movable up and down with respect to the door, and with the door closed, the inner door is lowered and its lower edge is placed in the chip collection groove on the edge of the chip collection groove wall. Although the door is configured to overlap and lock from the inside, the hinge part of the door and the lower edge of the door have been improved to allow the door itself to move up and down within a predetermined range, and when the door is closed, the lower edge of the door After closing the door that can be opened and closed in the raised position, the lower edge of the door faces the bottom edge of the chip collection groove wall from the inside of the enclosure wall. It is also possible to configure the structure to be polymerized and locked from the inside.

(Effects) According to the invention configured as described above, the following effects are achieved.

(1) Since the door is attached to the open part of the enclosure wall using a hinge, there is less friction when opening and closing, so less operating force is required, and there is no chance of chips getting caught, so it can be used for a long time. Demonstrates stable functionality over time.

(2) When the door is closed, the door functions as an enclosing wall for the rotating table of the machine tool, and within the chip collection groove, the lower edge of the inner door overlaps with the edge of the chip collection groove wall from the inside. Therefore, all the chips and coolant that hit the inner surface of the door are guided to fall into the chip collection groove, and they do not leak outside through the gap with the door.

(3) For the inner door, the force of the spring that pushes up the inner door in a well-balanced manner with respect to its overall weight is always applied, and the lifting mechanism of the inner door has a cover plate that prevents chips from flying. Because it is placed inside a covered space, the inner door can be raised and lowered easily and smoothly, providing stable functionality over the long term.

(4) The related structure including the door is simple, can be provided at low cost, and has excellent maintainability.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the main part, FIG. 2 is a longitudinal sectional view of the main part, and FIG.
The figure is a sectional view taken along line AA in FIG. 2. 1...Rotary table, 2...Chip collection groove, 3
... Enclosing wall, 4 ... Opening part, 5 ... Door, 6 ... Hinge, 7 ... Space, 8 ... Cover plate, 9 ... Inner door lifting mechanism, 10 ... Holding plate, 11 ... Inside Door, 12...
...door pillar, 13...handle, 14...cam.

Claims (1)

[Claims] 1. A chip collection groove is provided around the machine tool, the outer wall of the chip collection groove is extended upward to provide an enclosing wall, and chips that fall into the chip collection groove are arranged in the rotating middle bottom. In the machine tool dust prevention device, an opening is provided in a part of the enclosure wall, a door is provided in the opening that can be opened laterally toward the outside, and a lifting means is provided inside the door. The inner door is arranged so that it can move up and down in conjunction with the inner door. When the door is opened, the inner door is raised and the lower edge of the inner door is positioned above the edge of the chip collection groove wall. When the door is closed, the inner door is moved up and down. A dustproof device for a machine tool, characterized in that the lower end edge of the inner door is overlapped and locked to the chip collecting groove edge wall edge from the inside by lowering the inner door into the chip collecting groove.