JP2965740B2 - Cover device for machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover device for preventing swarf or the like from scattering to the rear of a column in a column-movable machine tool.

[0002]

2. Description of the Related Art In a fixed-table, column-movable machine tool, for example, a horizontal machining center, as shown in FIG. 6, a spindle head 2 is supported on a column 1 so as to be movable in the Y-axis direction. In order to move in the two directions of the X axis and the Z axis, providing a cover device for preventing scattering of chips and the like on both sides (YX plane) of the column 1 requires moving the cover device in the X axis direction of the column 1. It is technically difficult to move the column in accordance with the movement of the column. As shown in FIG. 6, many of the columns do not have cover devices on both sides of the column.

On the other hand, as shown in FIG. 7, a flexible cover 3 provided on both sides of a column 1 is provided in this type of cover device.
Is wound or unwound by a winding device 4 in accordance with the movement of the column 1 in the X-axis direction, or a multilayer metal cover 5 is provided on both sides of the column 1 as shown in FIG.
Are arranged so as to be able to expand and contract in the X-axis direction.

[0004]

However, all of the above-mentioned conventional cover devices have not only a complicated structure and a high manufacturing cost but also the following problems.

[0005] That is, in the former, the flexible cover 3 is generally made of cloth, and is very weak against metal chips and easily cut. Further, the winding device 4 has a built-in winding drive mechanism mainly using a spring, and has a drawback that a winding operation failure is likely to occur. On the other hand, the latter has a problem that although it is strong against cutting chips, it is difficult to rapidly expand and contract the vertically arranged metal covers 5 arranged in multiple layers, and it is not possible to increase the speed. Further, in both cases, the cover-side ends 3a and 5a adjacent to both side walls of the column 1 cannot be directly attached to the column 1 (since the column 1 moves back and forth in the Z-axis direction). It is necessary to fix and support the cover-side end 3a or 5a on a mounting table (not shown) movable in the X-axis direction in synchronization with the movement of the cover, so that the structure is complicated and the production cost rises. Had become.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure and a relatively low manufacturing cost, but can be easily and reliably adapted to the movement of the column in the X-axis direction. An object is to provide a cover device for a telescopic machine tool.

[0007]

In order to achieve the above object, according to the present invention, guide rails extending in the lateral movement direction (X-axis direction) of the column are arranged and fixed on both upper sides of the column. A bellows-type foldable telescopic cover is attached to the guide rail so as to be telescopically movable in the lateral movement direction (X-axis direction), and the outer end of the cover is fixed while the column-side end is fixed to the column. A guide fitting fixed to a side wall of the column via a connecting fitting so as to be slidable in the front-rear movement direction (Z-axis direction) of the column; Is characterized in that the stationary state is maintained with respect to the fore-and-aft movement (Z-axis direction).

It is desirable that the outer ends of the guide rail and the cover be fixed to an entire cover that covers the entire machine tool.

[0009]

According to the above construction, the column is in the horizontal direction (X axis direction).
, The bellows-type cover expands and contracts through the guide fitting in conjunction with this, and protects from the flying chips and the like on both sides of the moving column. On the other hand, when the column moves in the front-rear direction (Z-axis direction), the bellows-type cover remains stationary, and only the column moves back and forth.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a machine tool provided with a cover device according to the present invention. The machine tool main body is provided with a column 11 which is movable with respect to a bed 10 in two directions of an X axis and a Z axis. A spindle head 12 is attached to the column 11 so as to be movable in the Y-axis direction. Reference numeral 13 denotes a main shaft.

The cover device 15 is fixedly disposed above the column 11, and is arranged in the lateral movement direction (X-axis direction) of the column 11.
And a pair of right-and-left retractable covers 17 which are hung on the guide rails 16 on both sides of the column 11 and are attached along the guide rails 16 so as to be extendable and retractable in the X-axis direction. , 17 and
A guide fitting 18 for connecting the end 17a of the bellows type cover 17 on the column 11 side to the column 11 is included. The guide fitting 18 includes a guide rod 23 and a connecting fitting 24 as described later.

As shown in FIG. 2, the guide rail 16 is fixed to an inner bottom portion of a mounting frame 20 having a gate-shaped cross section, and both ends of the mounting frame 20 are fixed to an entire cover 14 (see FIG. 1) covering the entire machine. By doing so, it is arranged and fixed above the column 11. A plurality of sliders 21 are slidably attached to the guide rail 16, and the upper end edge of the bellows-type cover 17 is hung on a hanging bracket 22 provided on the slider 21, so that the rosette-type cover 17 is guided by the guide rail 16. It is foldable in the X-axis direction along 16 and is attached to be able to expand and contract.

As shown in FIG. 3, the guide fitting 18 has a simple structure in which the base end of a linear guide rod 23 is bent substantially at a right angle, and the bent portion 23a is fixed to the side wall of the column 11. The guide bar 23 is attached so as to extend in the Z-axis direction. On the other hand, a connecting metal fitting 24 having a U-shaped cross section is fixed to the inner end portion 17a of the cover 17, and a hole 25 provided in the connecting metal fitting 24 is slidably fitted to the guide rod 23 so that the cover 17
Are connected to the column 11 via the guide fittings 18.
The outer end 17b of the cover 17 is fixed to the entire cover 14 (see FIG. 1).

Auxiliary covers 26 are attached to both sides of the front surface of the column 11. The auxiliary cover 26 is configured such that the inner end 17a of the cover 17 has the connecting metal 24 and the guide metal 1.
8, it cannot be approached to the side wall of the column 11, and is provided to cover this space.

The cover 17 of the cover device having the above-described structure is capable of moving the column 11 in the lateral direction (X-axis direction).
As shown in FIG. 4, it is extended and retracted in conjunction with the guide metal 18 to prevent chips and cutting oil from being scattered to the rear of both sides of the column 11 during processing. On the other hand, column 11
As shown in FIG. 5, the guide rod 23 of the guide fitting 18
Just by sliding inside, the cover 17 itself keeps the stationary posture, and acts to prevent scattering of chips and the like as described above. Further, the guide rail 16 is protected from scattering of chips and the like by the gate-shaped mounting frame 20.

[0017]

As described above, the cover device of the present invention has a simple structure, has few components, can be manufactured at low cost, and has few failures. In particular, since a bellows-type cover is adopted, the expansion and contraction operation is extremely smooth and there are few troubles. Moreover, since it is lighter in weight than the conventional cover device, it is possible to increase the speed.

Further, since the bellows-type cover has a very small width when contracted, there is little restriction on the moving range of the machine, and as a result, the width of the whole machine can be reduced.

Further, the cover mounting structure is simple, and the cover can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a machine tool provided with a cover device according to the present invention.

FIG. 2 is an enlarged sectional view showing a mounting portion of the cover.

FIG. 3 is an enlarged plan view of a main part showing a connecting portion between the cover and a column.

FIG. 4 and

FIG. 5 is a schematic plan view showing a use state of the cover.

FIG. 6 is a perspective view of a machine tool without a cover device.

FIG. 7 is a perspective view showing a conventional example.

FIG. 8 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Column 12 Spindle head 13 Spindle 14 Entire cover 15 Cover device 16 Guide rail 17 Stirrup type cover 17a End of cover 17 on column 11 side 18 Guide fitting 23 Guide rod 24 Connection fitting

Claims (3)

(57) [Claims] 1. A column moving type machine tool, wherein guide rails extending in a lateral movement direction (X-axis direction) of the column are arranged and fixed on both upper sides of the column, and the guide rail is foldable and foldable on the guide rail. The cover is fixed to an outer end thereof while the cover is fixed to an outer end thereof, and a column-side end is fixed to a guide fitting fixed to a side wall of the column. The column is slidably connected in the front-rear movement direction (Z-axis direction) of the column via a connection fitting, and expands and contracts in conjunction with the lateral movement of the column, and moves in the front-rear movement (Z-axis direction) of the column. A cover device for a machine tool, wherein the cover device is configured to be kept stationary. 2. The guide fitting has a guide rod extending in the front-rear movement direction (Z-axis direction) of the column, while the connecting fitting has a hole into which the guide rod is slidably fitted. The cover device for a machine tool according to claim 1, wherein: 3. The cover device for a machine tool according to claim 1, wherein the outer ends of the guide rail and the cover are fixed to an entire cover of the machine tool.