JPS6244347A - Dust guard cover for machine - Google Patents

Abstract

PURPOSE:To reduce a space for receiving cover plates by forming and interconnecting the outermost cover plate couple with a fixed portion, the inner most cover plate coupled with a movable body and a plurality of the corresponding movable cover plates provided in series between said both plates at both sides of a movable body. CONSTITUTION:Cover plates 32, 33 are coupled with fixed portions 18a, 18b and cover plates 34, 35 are coupled with a movable body 20. Movable cover plates 28a, 28b are interconnected through a connecting frame 29 and cover plates 30a, 30b are interconnected through a connecting frame 31. When the movable body 20 is elevated, the cover plate 34 is also elevated and the upper portion 34a of the cover plate 34 abuts against the lower surface 31a of the connecting frame 31 to push up the cover plates 30a, 30b. This is carried out sequentially to lift the movable body 20 so that the cover plate are telescopically contracted on the upper portion and expanded on the lower portion. In the descent of the movable body, it is reversed. Thus, the dimension of one cover plate can be reduced to reduce a space for receiving it.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dustproof cover for a machine, and in particular, it can be used to widen the machining area in the front area of the machine, including around the spindle and work table where chips are often scattered. The present invention relates to an improved structure of a dustproof cover that covers the gap between the fixed part of the machine and the movable body and the guide surface thereof in the machining area to prevent dust from entering.

(Prior art and problems) In general, in machine tools, the guide surface on which the spindle head moves, or the guide surface on which the table, saddle, etc. move, is formed into a high-precision guide surface to maintain machining accuracy at a high level. Therefore, to prevent flying chips or chips mixed in the cutting fluid from adhering to these guide surfaces, or to prevent chips from adhering to the space between the moving body such as the spindle head, table, saddle, etc. and the fixed part of the machine. Conventionally, measures have been taken to install dustproof covers to prevent the infiltration of dust. However, conventional dustproof covers that use non-metallic covers such as rubber films have problems with durability, and In models using metal covers, long cover plates were installed in the front and back areas of the moving object to serve as movement guides, so each cover was damaged as the moving object moved. In moving the plate, there is a problem in that in addition to the actual stroke outside the machine, storage space must be secured inside the machine.

Furthermore, there is also a dust-proof structure in which the guide surface on which the moving object moves is covered with multiple housings with nested holes formed from metal plates, and each housing extends or folds into the nested holes as the moving body moves. However, this structure has the problem that creaks may occur in the metal plates forming each housing, which may impede the smooth movement of the moving body.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dust-proof cover for a machine tool that can achieve a dust-proof effect only in the moving area of a moving body and can suppress as much as possible the negative effects caused by the squeaks of the metal plate forming the cover. It is.

[Solution Means] In view of the above-mentioned object of the invention, the present invention provides a dustproof cover that covers the gap between a fixed part and a movable body in the machining area of a machine and the guide surface thereof, and provides a dustproof cover that covers the outer edge of the movable body on both sides of the movable body. a plurality of covering plates are provided on each side, each of which is successively connected inward from the base, the outermost member being coupled to the fixed portion, and the innermost member being coupled to the movable body; A dustproof cover for a machine is formed by connecting corresponding covering plates with a connecting body and expanding and contracting the covering plates in a telescopic manner according to the movement of the movable body. Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view showing an embodiment in which the dustproof cover of a tongue valve machine according to the present invention is applied to a spindle head of a machine tool, particularly a spindle head that moves up and down along a column of a machine tool. FIG. 2 is a front view seen from the line nn in FIG. 1, FIG. 3 is a perspective view showing how a pair of cover plates are connected, and FIG. 4 is a connection frame of the cover plates. FIG. 5 is a front view showing the state of the embodiment incorporated into a machine tool.

〔Example〕

First, referring to FIG. 5, there is shown a machine tool in which a dustproof cover according to the present invention is installed on the top of the spindle head in the upper moving area, and the machine tool has a bed 10, on which a dustproof cover is installed. A saddle 14 having a rotatable work table 12 is provided so as to be movable in the X-axis direction, and movement of the saddle 14 in the X-axis direction is controlled by cylindrical dustproof covers 15a, 16
Guidance is controlled by the X-axis feed mechanism and the X-axis direction, which is housed dust-proof inside b. A drive motor Mx is used as a drive source. An upright column 18 is erected at the rear of the bed 10 and is movable in the X-axis direction (direction perpendicular to the plane of the paper). A spindle head 20 is provided on the front surface of this upright column 18, that is, on the surface facing the working table belt 2, so as to be movable in the Y-axis direction. The movement of the spindle head 20 in the Y-axis direction with respect to the upright column 18 is performed using the motor My as a drive source, and the space between the upper end of the upright column 18 near the upper beam 18a and the lower end of the work table 12 near the table surface is stored in the column. Guidance is controlled by a Y-axis passing mechanism and a Y-axis guide. On the side of the upright column 18, movement of the work table 12 and saddle 14 in the X-axis direction, movement of the spindle head 20 in the Y-axis direction, and movement of the upright column 18 in the X-axis direction perpendicular to the plane of FIG. , and a control panel 24 for operating and controlling the rotation of the spindle 22 of the spindle head 20.
is provided. Now, the dustproof cover 26 according to the present invention
In this embodiment, the upright column 18 is used as the fixed part.

The dustproof cover 26 is provided for the spindle head 20 that forms the moving body in the downward direction (Y-axis direction).
A plurality of upper and lower covering plates 28 connected to both upper and lower ends of the
In FIG. 5, the upper cover plate 28 is in a contracted state due to the relatively upward movement of the spindle head 20, and the lower cover plate 28 is extended to cover the inside of the upright column 8. The gap or slit formed in the Y-axis guide or the relative movement portion between the upright column 18 and the spindle head 20 is protected from entering chips or cutting fluid mixed with chips.

FIG. 1 is a vertical cross-sectional view of the dustproof cover 26 provided in the vertical movement area of the spindle head 20, and FIG. 2 is a front view thereof.The spindle head 20 can be moved up and down by a device when it is lowered. is supported by The dustproof cover 26 is composed of a plurality of cover plates, and in the example shown in FIG. 35, cover plate 3
0b, a covering plate 28b, and a column lower fixed covering plate 33. These covering plates are combined so as to mutually extend and contract in a telescopic manner, and are placed over the spindle head 20.
It is designed not to obstruct movement below.

The cover plate 28a above the spindle head 20 is connected to the cover plate 28b below the spindle head 20 by a connecting frame 29. Third
As shown in the figure, a covering plate 28 is attached to the upper surface of the rectangular connecting frame 29.
a and 28b are fixed.

Further, the covering plate 30a and the covering plate 30b are connected by a connecting frame 31. These connecting frames 29 and 31 are the fourth
As shown in the figure, a rectangular connecting frame 31 is arranged so as to fit into a rectangular connecting frame 29. In this embodiment, a dustproof cover is provided on the vertical shaft along which the spindle head 20 moves upward, so that the cover plates are sequentially connected so as to face downward to prevent cutting fluid or the like from entering between the cover plates.

Next, the operation will be described. When the spindle head 20 moves up from the state shown in FIG. 1 on the Y-axis guide 19 of the upright column 18 by a drive device (not shown), the spindle head upper fixing cover plate 34 is fixed to the spindle head 20a. , so it rises together with the spindle head 20,
The upper part 34a of the covering plate 34 contacts the lower surface 31a of the connecting frame 31, and pushes up the connecting frame 31 and the covering plates 30a and 30b fixed to the connecting frame 31. When the spindle head 20 further rises, the upper surface 31b of the connecting frame 31 comes into contact with the lower surface 29a of the connecting frame 29, and the connecting frame 31 and the covering plate 28a9 fixed to the connecting frame 31 are removed.
Push b upward. Then, each cover plate above the spindle head 20 contracts in a telescopic manner, and conversely, the cover plate above the spindle head 20
The respective cover plate below 0 extends telescopically. At this time, the upper surface 29b of the connecting frame 29
It goes without saying that the stroke of the spindle head 20 is determined so that it does not come into contact with a. On the other hand, when the spindle head 20 descends, it descends together with the spindle head 20 because the spindle head lower fixing cover plate 35 is fixed to the spindle head lower surface 20b.

The spindle head lower surface 20b contacts the connecting frame 31, and the spindle head 2
0 descends, the connecting frame 31 then comes into contact with the connecting frame 29 and descends, pushing down the covering plate 30b and the covering plate 28b. Then, as shown in FIG. 1, the cover plate below the spindle head 20 contracts, and the cover plate above the spindle head 20 becomes stretched. At this time, the stroke of the spindle head 20 is determined so that the lower part 28c of the covering plate 28b does not come into contact with the column lower part 18b. As shown in FIG. 2, the connecting frames 29 and 31 are supported by a guide portion 40 and a presser plate 42, and are configured to move smoothly in accordance with the upward and downward movement of the spindle head 20. Further, since the spindle head 20 moves the covering plate by pulling the front part of the connecting frame 29, 31, the structure is such that it operates without any creaking.

In each drawing, in order to clarify the structure, the covering plate is drawn thickly for easy understanding, but in reality it should be made of thin metal plates. Further, although the connecting frames 29 and 31 are large in size, it is desirable to design them to be thin and compact. In this embodiment, there are two moving cover plates 28a (28b) and 30a (30b), but the number may be increased as appropriate depending on the stroke of the spindle head.

The above explanation has been about an example in which the spindle head of a machine tool is a movable body and an upright column is a fixed part of the machine. The moving body is inconvenient if cutting oil mixed with powder enters the moving guide surface. Therefore, it is also possible to construct an application example in which a dust-proof cover having a cover plate of the present invention is provided in a movement area in which the work table, saddle, etc. are moved relative to the machine fixing part on the side thereof.

(Effects of the Invention) As is clear from the above explanation, according to the structure 1 of the dustproof cover according to the present invention, only the movement area of the moving body of the machine is used to penetrate into the guide surface or the gap inside the movement area. It is now possible to create a dust-proof cover with a compact structure that can prevent the intrusion of cutting chips and cutting fluid mixed with chips. This eliminates the unreasonable need to increase the size of the machine for a function different from its original processing function, and contributes to making the machine more compact. have.

In addition, the mechanism of the connecting body is a structure formed by sequentially fitting large and small square frames, so it has appropriate rigidity and the connecting body and cover plate are not distorted while being guided by the guide part over the entire length of the connecting frame. It does not cause any respect,
Not only can the covering plate of the dustproof cover itself smoothly expand and contract, but also the movement of the movable body, such as the spindle head, can be made smooth. Therefore, since the size of one cover plate can be reduced, the storage space for the cover plate in addition to the stroke of the movable body can be reduced, and the entire machine can be made more compact. Of course, since mechanical elements having simple shapes such as a connecting body and a cover plate are used as the constituent elements of the dustproof cover, there is an advantage that the dustproof cover itself can be formed at a relatively low cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the dustproof cover for a machine tool according to the present invention, Fig. 2 is a front view seen from the line of arrows ■-■ in Fig. 1, and Fig. 3 is a connection of a pair of cover plates. FIG. 4 is a front view showing the connection frame of the covering plate; FIG. 5 is a front view of a machine tool showing an example in which the dustproof cover according to the present invention is incorporated into an upright column having a spindle head. 18... Upright column, 2o... Spindle head, 22
...Main shaft, 26...Dustproof cover, 28.
30...Covering plate, 29.31...Connecting frame, 3
2... Rubber upper fixing cover plate, 33... Column lower fixing cover plate, 34... Spindle head upper fixing cover plate, 35... Spindle head lower fixing cover plate.

Claims (1)

[Scope of Claims] 1. A dustproof cover that covers a gap between a fixed part of a component of a machine and a movable body and a guide surface of the movable body, the dust cover being coupled to the fixed part in moving areas on both sides of the movable body. an outermost covering plate coupled to the movable body, an innermost covering plate coupled to the movable body, and at least one
the corresponding movable covering plates on both sides of the movable body are connected by a connecting body, and the covering body expands and contracts in a telescopic manner as the movable body moves. A dustproof cover for a machine characterized by comprising: 2. The dustproof cover for a machine according to claim 1, wherein the fixed part is an upright column of a machine tool, and the movable body is a spindle head of the machine tool.