JPH07328887A - Dustproof device for machine tool - Google Patents

Abstract

PURPOSE:To increase moving speed of a main spindle by arranging a dustproof cover where a moving range in the vertical and lateral direction of the main spindle is formed as an opening window part, and blocking up this opening window part by dustproof sheets or a dustproof plate according to a movement of a moving column or a raising-lowering body. CONSTITUTION:A main spindle head is vertically and laterally moved by a lateral movement of a moving column and ascent-descent of a raising-lowering body, and is positioned in a machining position. A main spindle 22 longitudinally moves in this position, and machines a work by an action of a motor. Left and right dustproof sheets 48a and 48b are respectively wound round or unwound from a winding roller by following a lateral movement of the moving column. A dustproof plate 35 is raised and lowered by following ascent-descent of the raising-lowering body, and an upper dustproof sheet 38 is wound round or unwound from the winding roller. Thereby, an opening window part 34 of a dustproof cover is put in an always blocked-up condition, and chips or the like generated in a machining area are prevented from sticking to respective guide units of the moving column, the raising-lowering body and the main spindle head.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable column supported by a machine base so as to be movable left and right, an elevating body supported by the movable column so as to be vertically movable, and a spindle head supported by the elevating body so as to be movable back and forth. The present invention relates to a dustproof device for a machine tool including the.

[0002]

2. Description of the Related Art A conventional general machine tool is disclosed in, for example, Japanese Unexamined Patent Publication (Kokai) No. 5-277861.
This is because the movement of the moving column, lifting body, spindle head, etc.
The guide units (guide rails, sliders) are used to perform the operation, and each of these guide units has a bellows-type dustproof cover to prevent chips and the like from being generated in the processing area during processing. It was provided.

[0003]

In the recent machine tools, it has been demanded to increase the moving speed of the moving column, the lifting body and the spindle, but in the conventional dustproof device for a machine tool, each moving body is provided with the moving body. Due to the weight of the bellows type dustproof cover itself, there is a problem that the moving speed of the moving column, the lifting body and the spindle head cannot be sufficiently increased.

[0004]

In order to solve the above problems, in claim 1 of the present application, the machine base is divided into a machining region in front of the machine base and a moving column, and the spindle is moved in the vertical and horizontal directions. Provided with a dust-proof cover with a range of opening windows,
A dustproof plate with a protruding hole through which the main shaft projects is provided close to the opening window, and when the lifting body is located at the ascending end, this dustproof plate is placed above and below the opening window with the horizontal plate width. It is formed with a vertical length that closes the entire length in the vertical direction.The tip of the upper dustproof sheet that is wound up by the winding roller provided on the moving column is attached to the upper end of this dustproof plate, and this upper dustproof sheet Even if it is located at any elevation position, it is configured so as to block the opening space directly above the dustproof plate in the opening window, and the moving column is positioned at the position corresponding to the left and right edges of the dustproof plate, and on the machine base fixed side. Attach the ends of the left and right dustproof sheets that are respectively wound to the winding rollers provided, and attach these left and right dustproof sheets to the dustproof plate and the upper dustproof sheet in the opening window even if the moving column is positioned at any horizontal position. That it is configured to block the opening space on the left right side According to the second aspect of the invention, the machine base is provided with a dust-proof cover that defines a machining region in front of the machine base and a moving column, and has a vertical axis and a horizontal direction moving range of the spindle as an opening window section. Is provided with a dustproof plate formed with a projecting hole through which the main shaft projects, in the vicinity of the opening window, and the upper and lower ends of the dustproof plate are provided with upper and lower dustproof sheets that are respectively wound by the take-up roller provided on the moving column. Attaching the tip, these upper and lower dustproof sheets are configured to block the opening space just above and below the dustproof plate in the opening window part even if the lifting body is located at any raising / lowering position. At the positions corresponding to the left and right edges of the plate, attach the tips of the left and right dustproof sheets that are taken up by the take-up roller provided on the machine base fixed side, and position these left and right dustproof sheets at the desired horizontal position. Even if the dustproof plate and the top and bottom of the opening window Characterized by being configured so as to close the opening space of the left and right sides of the dust sheet.

[0005]

According to the first aspect of the invention, the left and right dustproof sheets are wound or unwound by the take-up roller in accordance with the horizontal movement of the moving column, and the dustproof plate is moved in accordance with the elevation of the lifting body. As it moves up and down, the upper dust-proof sheet is taken up or unwound by the take-up roller, so the opening window part of the dust-proof cover is always closed, and chips generated in the processing area move column, Adhesion to the guide units of the lifting body and the spindle head is prevented. According to the second aspect of the invention, the left and right dustproof sheets are wound or unwound by the take-up roller in accordance with the horizontal movement of the moving column, and the upper and lower dustproof sheets are wound in accordance with the elevation of the elevating body. Since the take-up roller is wound or unwound, respectively, the opening window of the dust-proof cover is always closed, and the chips generated in the machining area are guided by the moving column, lifting body, and spindle head. It is prevented from adhering to the unit.

[0006]

Next, an embodiment of the machine tool 1 will be described with reference to the drawings. In FIGS. 1, 2, and 3, two guide rails 3 extending in the left-right direction are arranged on the upper surface of the machine base 2, and a slider 5 fixed to the lower end of a gate-shaped moving column 4 is guided to the guide rails 3. It is supposed to be done. Further, a ball screw mechanism 6 is provided between the moving column 4 and the machine base 2.
The movable column 4 is supported by the action of the motor 7 via the ball screw mechanism 6 so as to be movable in the left-right direction with respect to the machine base 2. Three guide rails 11 extending vertically are fixed to the front surface and the rear surface of the moving column 4, and a slider 13 provided on an elevating body 12 having a U-shaped cross section is guided to these guide rails 11. It is like this. Further, a ball screw mechanism 14 is interposed between the lifting body 12 and the moving column 4, and the ball screw mechanism 1
The lifting / lowering body 12 is supported by the movement of the moving column 4 by means of the motor 15 via the motor 4 in the vertical direction. Two guide rails 17 extending in the front-rear direction are arranged on the upper surface of the horizontal portion of the elevating body 12.
A slider 19 provided on the spindle head 18 is guided in the. In addition, the spindle head 18 and the lifting body 12
A ball screw mechanism 20 is interposed between the shaft head 1 and the main shaft head 1 by the action of the motor 21 via the ball screw mechanism 20.
8 is supported so as to be movable in the front-rear direction with respect to the lifting body 12. A spindle 22 capable of gripping a tool T is rotatably supported on the spindle head 18, and the spindle 22 is rotated by the action of a machining motor 23 fixed to the spindle head 18. In the drawing, O is a tool exchange position of the spindle, and 24 is a well-known tool magazine provided with a large number of tools T, which is rotatably supported by a base frame 32 fixed to the upper surface of the machine base 2. And 25 is a well-known tool exchanging device for exchanging the tool T gripped by the spindle 22 located at the tool exchanging position O with the tool T of the tool magazine 24 indexed at the exchanging position. R is a processing region of a work placed on the front upper surface of the machine base.

Next, the dustproof device 3 will be described with reference to FIGS.
1 will be described. Machine frame 32 fixed to the upper surface of machine base 2
A dustproof cover 33 that divides the processing region R and the moving column 4 is fixed to the upper end of the. In the dust cover 33, a portion corresponding to the moving range of the main shaft 22 in the vertical and horizontal directions is formed in the opening window 34. A flat dustproof plate 35 is fixed to the front end surface of the lifting body 12 at a position close to the opening window portion 34. As shown in FIG. 6, the dustproof plate 3
5 has a vertical length H that is substantially the same as the vertical length L of the opening window portion 34, and when the elevating body 12 is located at the rising end position, the opening width portion 5 has a plate width S thereof. It is configured to substantially close the entire length of 34 in the vertical direction. A projecting hole 36 through which the main shaft 22 projects is formed in the upper part of the dustproof plate 35. The moving column 4 is attached to the upper edge of the dustproof plate 35.
The tip of an upper dustproof sheet 38 to be wound up by a winding device 37 provided at the rear of the upper surface is attached. Upper dustproof sheet 38
The intermediate part of the above is wound around a support roller 39 rotatably supported on the front part of the upper surface of the moving column 4. Winding device 37
As shown in FIG. 7, the winding roller 41 having the rear end of the upper dustproof sheet 38 mounted in the bracket 40 on the box is shown in FIG.
Is rotatably supported, and the winding roller 41 is biased in the winding direction by a torsion coil spring 42. The horizontal width M of the upper dustproof sheet 38 is set to be substantially the same as the horizontal width S of the dustproof plate 35.
The vertical length of 8 is set to a length that can close the opening space 34 immediately above the dustproof plate 35 in the opening window portion 34, regardless of the lifting position of the lifting body 12.

A plurality of mounting brackets 46 are fixed to the left and right side surfaces of the moving column 4 via support brackets 45. On the mounting bracket 46, the left and right dustproof sheets 4 wound by the respective winding devices 47a and 47b provided on the left and right base frames 32 at positions facing the left and right edges of the dustproof plate 35.
The tips of 8a and 48b are attached. The middle of the left and right dustproof sheets 48a, 48b is wound around support rollers 49a, 49b rotatably supported by the left and right base frames 32. The winding devices 47a and 47b are the winding device 37.
The winding rollers 50a and 50b, which have the same structure as the above, and whose rear ends are fixed to the left and right dustproof sheets 48a and 48b, are biased in the winding direction by a torsion coil spring 42. The vertical width N of these left and right dustproof sheets 48a, 48b is set to be slightly larger than the vertical width L of the opening window portion 34, and the left and right dustproof sheets 48a, 48b have a horizontal length of The length is set so that the horizontal opening space of the dustproof plate 35 and the upper dustproof sheet 38 in the opening window portion 34 can be closed no matter what the horizontal position of the moving column 4 is.

Next, the machine tool 1 configured as described above.
The action of will be described. By moving the moving column 4 left and right and raising and lowering the elevating body 12, the spindle head 18 is moved up and down and left and right to be positioned at the machining position, and the spindle 22 is moved back and forth at this position to machine the work by the action of the motor 23. Then, for example, when the spindle 22 is located at the tool exchange position O, the opening window portion 34 of the dustproof cover 33 has the dustproof plate 35.
And the right dustproof sheet 48b. When the spindle head 18 descends from this state, the upper dust-proof sheet 37 connected to the winding device 37 is unwound from the winding roller 41 against the torsion coil spring 42 as the spindle head 18 descends.
The upper dustproof sheet 37 closes the opening space immediately above the dustproof plate 35 in the opening window portion 34. Further, when the moving column 4 in the state of being located at the left end position moves to the right, the right dust-proof sheet 48b connected to the winding device 47b moves along with this rightward movement, and the torsion coil spring 42 acts to wind the winding roller 50b. The left dust-proof sheet 48a, which is wound on the winding device 47a and connected to the winding device 47a, is twisted by the coil spring 42.
From the take-up roller 50a against
The opening space in the left-right direction of the dustproof plate 35 in FIG. Therefore, as the spindle head 18 moves vertically and horizontally, the opening window portion 34 is
Always each dustproof sheet 38, 48a, 48b and dustproof plate 35
Since the movable column 4, the lifting body 12, the guide rails 3, 11, 17 of the spindle head 18, and the sliders 5, 13, 19 are closed by the dust cover 3 for the processing region R,
It is divided by 3 and these guide rails 3, 11,
The chips and the like generated in the processing region R do not adhere to 17 or the sliders 5, 13, and 19.

In the above embodiment, the vertical length H of the dustproof plate 35 is set to be approximately the same as the vertical interval L of the opening window portion 34, but this is stopped and the vertical length of the dustproof plate 35 is increased. The length of the dustproof plate 35 is substantially the same as the horizontal length S of the dustproof plate 35, and a lower dustproof sheet to be wound by the winding device provided on the moving column 4 is attached to the lower end of the dustproof plate 35 to form the dustproof device. Is also good.

[0011]

As described above, in the dustproof device for a machine tool of the present application, the machine base is divided into the machining area in front of the machine base and the moving column, and the vertical and horizontal movement range of the spindle is defined as the opening window. A dustproof cover is provided, and this opening window is covered with a dustproof sheet or dustproof plate as the moving column or lifting body moves. Since it is not necessary to provide a bellows type dust-proof cover for each of them and only a relatively light dust-proof sheet is attached to the moving column and the elevating body, the movement of the spindle can be accelerated.

[Brief description of drawings]

FIG. 1 is a front view of a machine tool.

FIG. 2 is a II view in which a part of FIG. 1 is a cross section.

FIG. 3 is a front view of the machine tool of FIG. 1 with a dustproof cover removed.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

6 is a VI view of FIG. 5.

FIG. 7 is a cross-sectional view of the winding device.

[Explanation of symbols]

1 machine tool, 2 machine bases, 4 moving columns, 12
Lifting body, 18 spindle head, 31 dustproof device, 3
3 Dust cover, 34 Open window, 35 Dust plate,
36 protruding holes, 38, 48a, 48b dustproof sheet,
41, 50a, 50b winding roller

Claims (2)

[Claims] 1. A machine tool comprising a movable column movably supported on a machine base left and right, an elevating body movably supported on the movable column, and a spindle head movably supported by the elevating body. In the machine stand, a machining area in front of the machine stand and a moving column are defined, and a dustproof cover having an opening window in the vertical and horizontal movement range of the spindle is provided. A dustproof plate with a hole is provided close to the opening window, and when the lifting body is located at the rising end, the dustproof plate closes the entire vertical length of the opening window with the width of the horizontal direction. It is formed with a vertical length, and at the upper end of this dustproof plate, attach the tip of an upper dustproof sheet that is taken up by the take-up roller provided in the moving column. Even if it is located, the opening space just above the dustproof plate in the opening window part The moving column is equipped with the tips of the left and right dustproof sheets that are respectively wound on the take-up rollers provided on the machine base fixed side, at the positions corresponding to the left and right edges of the dustproof plate. A dustproof device for a machine tool, characterized in that the seat is configured so as to close the opening spaces on the left and right sides of the dustproof plate and the upper dustproof sheet in the opening window portion even if the moving column is positioned at an arbitrary lateral position. . 2. A machine tool comprising a movable column movably supported on a machine base left and right, an elevating body movably supported on the movable column, and a spindle head movably supported by the elevating body. In the machine stand, a machining area in front of the machine stand and a moving column are defined, and a dustproof cover having an opening window in the vertical and horizontal movement range of the spindle is provided. A dustproof plate with holes is provided close to the opening window, and the upper and lower ends of this dustproof plate are fitted with the tips of the upper and lower dustproof sheets that are respectively wound on the take-up rollers provided on the moving columns. The seat is configured so as to block the opening space just above and below the dustproof plate in the opening window part even if the lifting body is located at any lifting position, and the moving column corresponds to the left and right edges of the dustproof plate. Position to the take-up roller provided on the machine base fixed side. Attach the tips of the left and right dustproof sheets to be taken, and close the left and right dustproof sheets in the opening window part on the left and right side even if the moving column is positioned at any horizontal position. A machine tool dustproof device characterized in that