JP3326115B2 - Y-axis slide cover 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 vertical partition cover provided to prevent chips and cutting oil generated when processing a workpiece with a machine tool from scattering and entering a processing unit. Of the Y-axis slide cover.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No.
A slide cover device for a machine tool disclosed in Japanese Patent Publication No.-218651 has been proposed. In this slide cover device,
In both the X-axis direction and the Y-axis direction, the expansion and contraction of the cover is performed by the locking pieces of the covers, so that even if a soundproof material such as rubber is inserted, the expansion and contraction speed is limited.

Further, as a conventional cover, Japanese Patent Application Laid-Open No.
Japanese Patent Laid-Open No. 5780 discloses a telescopic cover in which pantographs are provided in multiple rows. This telescopic cover has two or more rows of pantographs spaced apart from each other in parallel with a telescopic cover formed by laminating a plurality of thin plate-shaped partial covers having the same width and different lengths so as to be slidable in order of length. The sliding mechanism of the industrial equipment is attached to one or both ends of the longest partial cover or the shortest partial cover of the telescopic cover, and the pantograph responds to the sliding of the telescopic cover. Is configured to operate.

[0004]

However, the above-mentioned conventional telescopic cover is a mechanism for mounting two pantographs on each of the upper and lower separate covers, so that the number of parts is large and the production and assembling are troublesome and cost reduction is achieved. There was a problem that can not be.

Further, a telescopic cover disclosed in Japanese Patent No. 2527920 has been proposed. This cover is nested with a plurality of large and small covers between a moving body that moves along the guide surface of the machine and the end of the guide surface, and each cover body is elastically connected by a pantograph link mechanism. In addition, the guide surface is covered. Further, the plurality of cover bodies are superimposed on the inside as approaching the moving body, and the length in the direction of expansion and contraction is shortened as approaching the moving body, and the link mechanism reduces each link length of the cover. The length is gradually increased from the inner cover body side close to the moving body in accordance with the length of the body.

However, when the above-mentioned telescopic cover is used as a Y-axis slide cover, the wiper side faces upward, so that the intrusion of cutting oil cannot be prevented, and it is inappropriate to use as the Y-axis cover. When used as a partition cover, the guide surface of the machine tool cannot be used as a cover guide, and it is necessary to provide a cover guide independently.

Further, the present applicant has proposed a sliding surface protection device for a machine tool disclosed in Japanese Utility Model Laid-Open Publication No. Hei 6-33642. This sliding surface protection device eliminates the need to adjust the spacing between the cover plates when assembling to the machine tool, and can easily perform the assembling work. However, in the conventional sliding surface protection device described above, a rubber elastic body such as a grommet is attached to the cover locking portion in order to cope with a high speed, but the moving speed in the Y-axis direction is higher (50 m). / Min
Above), the collision noise generated when the cover expands and contracts is also 80
Beyond decibels, there has been a need for a quiet, low-impact cover.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior arts and to follow a high-speed movement in the Y-axis direction, and furthermore, a Y-axis slide cover of a machine tool which is less affected by collision noise and vibration generated during expansion and contraction. Is to provide.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a Y-axis saddle is provided on a column erected on a bed so as to be capable of reciprocating up and down.
The spindle head is mounted on the spindle saddle, and a plurality of covering plates are arranged above and below the spindle head so that the adjacent covering plates always partially overlap, so that the spindle head can reciprocate vertically. In the Y-axis slide cover of the machine tool in which the overlapping portion of each covering plate expands and contracts in the reciprocating direction, the covering plate located at the uppermost position is disposed at the position closest to the work area, As it goes from the second or lower coating plate to the coating plate located at the lowermost position, it is disposed so as to be gradually separated from the work area, and a pair of coating plates most separated from the spindle head are arranged in the Y-axis direction. Connected by an extending connecting member, the covering plates sequentially approaching the spindle head from the pair of covering plates furthest away from the spindle head are connected by respective connecting members, and a pair of covering plates adjacent to the spindle head are connected. A window for allowing the shaft head to protrude is formed, and further, at least one cover of each covering plate constituting a lower cover located below the spindle head or an upper cover located above. Are connected by a pantograph link mechanism.
Then, each cover constituting the upper cover or the lower cover is formed.
At the upper edge of the cover plate, a locking piece is formed curved rearward at a right angle,
Each locking piece has a large size that can be stacked with the cover reduced.
A concave pin support frame body that is different in step size is provided,
Each pin support frame has a central part of the pantograph link mechanism
Are supported.

According to the second aspect of the present invention, in the first aspect, each of the cover plates is arranged such that Y becomes closer to the spindle head.
The pantograph-type link mechanism is set to be short in the axial direction, and the link length of the pantograph-type link mechanism is gradually shortened toward the main spindle head in accordance with the length of the covering plate in the Y-axis direction.

According to the third aspect of the present invention, in the first aspect, each of the cover plates is arranged such that Y becomes closer to the spindle head.
The pantograph-type link mechanism is set to be long in the axial direction, and the connecting link length of the pantograph-type link mechanism is gradually increased toward the main spindle head in accordance with the length of the covering plate in the Y-axis direction.

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the machine tool to which the Y-axis slide cover of the present embodiment is attached, an X-axis table 12 is installed on the upper surface of a bed 11 as shown in FIG. A pair of parallel X-axis rails 13 are mounted. Y along these X-axis rails 13
The shaft column 14 is mounted so as to be able to reciprocate in the X-axis (up and down directions in FIG. 11). The column 14 has a Y-axis saddle 15
Are mounted so as to be able to reciprocate in the Y-axis (up and down directions in FIG. 12) by a drive mechanism (not shown). A spindle head 16 is mounted on the Y-axis saddle 15, and a tool 1
7 is mounted. A work table 18 is provided in front of the spindle head 16, and a work W to be machined is fixed on the work table 18 by a clamp mechanism (not shown).

At the outer periphery of the bed 11, a splash guard 21 is disposed in a substantially square shape, and at an intermediate portion of the splash guard 21, an X-axis cover 22 and a Y-axis slide cover 23 corresponding to the spindle head 16 are provided. Are arranged on the same vertical plane. The inside space of the splash guard 21 is divided into a processing unit area 24 and a work area 25 by the slide covers 22 and 23 of the X axis and the Y axis.

The Y-axis slide cover 23 is schematically shown in FIG. 1 showing a rear view and FIG. 2 being a perspective view seen from the back side, as shown in FIG. The first to fifth moving covering units 31, 32, 33, 34, 35 sequentially accommodated in the 30 and the pantograph connected to the fixed covering unit 30 and the first to fifth moving covering units 31 to 35. And a link mechanism 36.

As shown in FIG. 6, the fixed covering unit 30 includes an upper fixed covering plate 37 made of a flat metal thin plate.
And a lower fixed cover plate 3 also made of a flat metal thin plate.
8 and a pair of fixed rails 39 as a connecting member. These fixed rails 39, 39
Each of the rectangular metal sheets is bent in the same direction on both sides in the longitudinal direction, and includes a support piece 39a located on the outermost side and a pair of restricting pieces 39b, 39b as guides which are perpendicular to the support piece 39a. Is formed. Therefore, the fixed rails 39, 39 extend in parallel so that the opening sides of the U-shaped cross section face each other, and the upper fixed covering 39b is provided at the upper end between both regulating pieces 39b on the front side (lower in FIG. 6). The left and right ends of the plate 37 are respectively fixed by welding or integrally formed.
The left and right ends of the lower fixed cover plate 38 are welded and fixed at the lower end positions between the two regulating pieces 39b, 39b on the rear side (upper side in FIG. 6).

At the upper ends of the upper fixed cover plate 37 and the lower fixed cover plate 38, locking pieces 37a extending rearward (upward in FIG. 6) perpendicular to the surfaces of the fixed cover plates 37, 38 are provided.
38a are provided respectively. A reinforcing plate 40 is welded to the surface of the lower fixed cover plate 38 corresponding to the locking piece 38a. At the lower end of the lower fixed cover plate 38, a mounting plate 38b is formed at a right angle rearward (upward in FIG. 6), and on the upper surface (right side in FIG. 6) of the mounting plate 38b, a mounting block 4 is provided.
1 is welded to the block 41, and the fixed side connecting pin 4 for connecting the connecting link of the pantograph link mechanism 36 is connected to the block 41.
2a is supported.

The locking pieces 37a, 38a and the mounting plate 38b are integrally provided on the upper fixed cover plate 37 and the lower fixed cover plate 38, respectively. Only the locking piece 37a is a Y-axis slide cover. Is formed at a right angle in the manufacturing stage.

The first to fourth moving coating units 31
34 have a shape similar to that of the fixed covering unit 30. That is, as shown in FIG.
In the moving covering units 31 to 34, the upper moving covering plates 371 to 374 and the lower moving covering plates 381 to 381, respectively.
384 and locking pieces 371a to 374a, 381a to 38
4a is substantially the same in shape and size as that of the fixed covering unit 30.

The lower moving cover plates 381 to 381 shown in FIG.
84 is the mounting plate 3 on the fixed coating unit 30 side shown in FIG.
8b, the mounting block 41 and the connecting pin 42a,
A pair of left and right support plates 46 with respect to the locking pieces 381a to 384a.
a to 46d are fixed by welding. The support plates 46a-
Upper ends of a pair of left and right mounting plates 43, 43 are welded and fixed to inner ends of 46d, and both ends of a connecting member 44 are welded and fixed between lower ends of both mounting plates 43, 43, and a pantograph is provided on the surface of the connecting member 44. The connecting pins 42b to 42e for connecting the connecting links of the type link mechanism 36 are provided in a protruding manner. Recessed pin support frames 45a to 45d of different sizes that can be stacked by the mounting plates 43, 43 and the connecting member 44.
Are formed.

As shown in FIG. 7, the width W of the outermost support piece 391a of the U-shaped moving rail 391 as a connecting member of the first moving covering unit 31 is determined.
1 is a support piece 3 of the fixed covering unit 30 shown in FIG.
The thickness t of the rail 391 that forms the rail 391 is less than the width W2 of 9a.
Double the size (for example, this dimension is "2t + 0.3 to 0.6 m
m "). FIG.
The width D1 of the restricting piece 391b as a guide shown in FIG.
The width D of the regulating piece 39b of the fixed covering unit 30 shown in FIG.
2 more than the thickness t (this dimension is, for example, “t + 0.3 to
0.6 mm ").
Further, the length L1 of the moving rail 391 shown in FIG. 7 in the Y-axis direction is longer than the length L2 of the fixed rail 39 shown in FIG.
It is formed short within a range of 3 or less. Furthermore, the horizontal width M1 of the fixed covering plates 37 and 38 and the movable covering plate 3
The horizontal width M2 of 71 and 381 is set to be the same. First moving coating unit 3 thus configured
The U-shaped moving rail 391 can be slidably accommodated in the U-shaped fixed rail 39 only in the vertical (Y) direction. (See FIGS. 9 and 10.) The second movable coating unit 32 is a fixed coating unit 30.
Similarly to the relationship between the first moving covering unit 31 and the first moving covering unit 31, the first moving covering unit 31 is formed smaller. That is, the width of the support piece 392a is formed to be narrower than the width of the support piece 391a by a little more than twice the plate thickness, and the width of the regulating piece 392b as the guide portion is formed to be narrower by the plate thickness. Similarly, the length of the moving rail 392 as a connecting member is also shorter within a range within the vertical length of the upper moving covering plate 371 or the lower moving covering plate 381. Further, the size of the pin support frame 45b of the second movable coating unit 32 is
And the size of the pin support frame 45c of the third movable covering unit 33 is
It is formed smaller than the pin support frame 45b of the second movable covering unit 32. The moving rail 392 of the second moving covering unit 32 configured as described above is housed in the moving rail 391 of the first moving covering unit 31 so as to be slidable only in the vertical (Y) direction, and further, the third moving The moving rail 393 of the covering unit 33 is accommodated in the moving rail 392 of the second moving covering unit 32 so as to be slidable only in the vertical direction (Y).

The relationship between the fourth moving coating unit 34 and the fifth moving coating unit 35 is also the same as the relationship between the first to third moving coating units 31 to 33 described above. However, as shown in FIG. 8, the fifth moving covering unit 35 is formed such that the upper moving covering plate 375 extends to a position corresponding to the lower moving covering plate 385 when viewed from the back surface thereof. Window 375b in the center of 375
Are formed so that the spindle head 16 can be fitted outside. A support plate 46e is welded to the upper surface of the locking piece 385a of the lower moving cover plate 385, and the inner edge thereof is welded to the lower end edge of the upper moving cover plate 375. (See FIG. 4) Further, the mounting plate 4 is attached to the support plate 46e.
7 are welded, and the connecting pin 42f of the pantograph link mechanism 36 is supported by the block 47.

Therefore, as shown in FIG. 3, when viewed from the front of the Y-axis slide cover 23, the upper fixed covering plate 37, the first fixed cover plate 37,
, The upper moving cover plate 372 of the second coating unit 32, the upper moving cover plate 373 of the third coating unit 33, the upper moving cover plate 374 of the fourth coating unit 34, and The upper moving covering plate 375 of the fifth covering unit 35 is sequentially stacked on the rear side. In addition, below the main spindle head 16, a lower moving covering plate 385 of the fifth moving unit 35 is arranged from the upper part thereof,
A lower moving covering plate 384 of the fourth moving covering unit 34,
The lower moving cover plate 383 of the third moving unit 33,
Moving covering plate 382 of the moving covering unit 32 of the second
The lower movable cover plate 382 of the first cover unit 32, the lower movable cover plate 381 of the first cover unit 31, and the lower fixed cover plate 38 are sequentially stacked on the rear side.

In this embodiment, each of the covering plates 37, 37
An upper cover K1 located above the spindle head 16 is constituted by 1 to 375, and the respective cover plates 38, 381 to 385
The lower cover K2 located below the spindle head 16
Is configured. As the spindle head 16 moves in the vertical direction, the upper cover K1 and the lower cover K2 are moved.
Is adapted to stretch or shrink telescopically.

As shown in FIG. 1, the base end of a pair of connecting links 51 constituting the pantograph link mechanism 36 is connected to the fixed connecting pin 42a located at the lowermost position. A connecting pin 5 is provided at the tip of both connecting links 51.
2a connects a pair of connecting links 53, and both connecting links 53 are connected to the first moving covering unit 31 at an intermediate portion.
Is rotatably connected to the connecting pin 42b attached to the connecting pin 42b. Similarly, the connecting links 53 and 54 are connected to the connecting pins 52b, 52c, 52d and 52e and the connecting pins 4
Articulated by 2c-42f. The link 5
The lengths of 1, 53 and 54 are shorter as going upward.

Next, a process of manufacturing the Y-axis slide cover having the above configuration will be described. First, as shown in FIG. 6, the upper fixed cover plate 37 and the lower fixed cover plate 38 are welded to a pair of fixed rails 39 to manufacture the fixed cover unit 30. Similarly, the first to fifth moving coating units 31 to 35
Are manufactured individually.

The locking pieces 38a, 381a to 385a provided integrally with the lower coating plates 38, 381 to 385 of the coating units 30, 31 to 35 are formed by bending. Each coating unit 30, 31 to 3
5, the lower cover plate 38, 381-385, and the reinforcing plate 4
0, support plates 46a to 46e, mounting blocks 41 and 47,
Connecting pins 42a to 42f, pin support frames 45a to 45d
Attach etc. However, the locking piece 37a of the upper fixed coating plate 37 of the fixed coating unit 30 and the locking piece 371 of the upper coating plate 37 of the first to fourth movable coating units 31 to 342 are provided.
a to 374a are not bent at this time, and each locking piece 3
7a, 371a to 374a are upper fixed covering plates 3 respectively.
7. It is positioned on the plane of the upper cover plates 371 to 374, and remains in a flat plate shape as a whole. The locking piece 375a of the moving covering plate 375 of the fifth moving covering unit 35 is formed by bending. Therefore, at this stage, the upper surfaces of the fixed coating unit 30 and the first to fourth movable coating units 31 to 34 have the locking pieces 371a to 371a.
It is open without being closed by 74a.

After the units 30, 31 to 35 are manufactured in this way, first, the fifth movable covering unit 35 obtained by bending the locking piece 375a from the upper opening of the fourth movable covering unit 34 is inserted. Moving coating unit 34
Is bent 90 degrees to the rear side.

Next, the fourth moving covering unit 34 is inserted through the upper opening of the third moving covering unit 33, and the locking piece 373a on the upper side of the third moving covering unit 33 is bent. Further, the third moving covering unit 33 is inserted from the upper opening of the second moving covering unit 32, and the locking piece 372a on the upper side of the second moving covering unit 32 is bent. The second moving covering unit 32 is inserted from the upper opening of the first moving covering unit 31, and the locking piece 371a on the upper side of the first moving covering unit 31 is bent. Further, the first movable covering unit 31 is inserted from the upper opening of the fixed covering unit 30 and the locking piece 37a on the upper side of the fixed covering unit 30 is bent.

Next, one ends of the connection links 51 and 54 are connected to the connection pins 42a and 42f, and the connection link 5 is connected to the connection pins 42b to 42e.
The Y-axis slide cover is manufactured by articulating the center of 3 and articulating the ends of the connecting links 51, 53, 54 by connecting pins 52a to 52e.

In this embodiment, the thickness of the Y-axis slide cover is shown thick in each drawing for clarity of the structure, but actually, each of the covering plates 37, 38, 371 to 37 is shown.
5, 381 to 385, each rail 39, 391 to 395
Is made of a thin metal plate of about 1 mm to 1.6 mm. Also, the width of the support pieces 39a, 391a to 395a is actually thin and compact.

Next, the operation of the Y-axis slide cover configured as described above will be described. Now, when the machine tool is operated and the spindle head 16 slides upward from the state shown in FIG. 1, the fifth movable coating unit 35 integrally moves with the upward movement of the spindle head 16.

First to fifth moving coating units 31 to 35
Are connected by the pantograph link mechanism 36, the units 31 to 34 are raised by the link mechanism 36 in proportion to the moving distance of the fifth moving covering unit 35.

When the spindle head 16 is moved from the lowermost position shown in FIG. 4 to the uppermost position shown in FIG. 5, the locking piece 371a on the upper side of the first movable coating unit 31 is moved to the fixed coating unit 30. Abuts against the locking pieces 37a on the upper side of each of the first and second movable covering units 32-35.
2a to 375a also come into contact with each other. When each of the moving coating units 31 to 35 is pushed up in this way,
The respective overlapping portions of the lower fixed cover plate 38 and the lower movable cover plates 381 to 385 disposed below the spindle head 16 extend, but the adjacent cover plates 38, 381 to 38 are extended.
5 are not separated from each other in the vertical direction. Therefore, even if the spindle head 16 is operated in the state shown in FIG. 5, the chips and dust that have collided with the lower covering plates 38, 381 to 385 fall down and do not scatter to the column side.

Conversely, when the spindle head 16 slides downward from the state shown in FIG. 5 to the lowermost position shown in FIG.
Locking piece 38 on the lower side of each of the moving covering units 31 to 35
1a to 385a come into contact with each other. Then, the respective overlapping portions of the upper fixed covering plate 37 and the upper moving covering plates 371 to 375 extend, but the adjacent upper fixed covering plate 37 and the upper moving covering plates 371 to 375 are not separated from each other in the vertical direction. . Therefore, the spindle head 16
As in the case of the upward movement, the dust falls downward and does not scatter to the column side.

Next, the effects of the Y-axis slide cover configured as described above will be listed together with the configuration. (1) In the above embodiment, the fixed covering unit 30
And the first to fifth moving covering units 31 to 35 are connected to each other by the pantograph link mechanism 36,
Even when the spindle head 16 is moved at a high speed in the Y-axis direction, each of the locking pieces 37a, 371a to 375a, 38a, 381a to 3
The collision between 85a can be prevented. Therefore, noise can be reduced and durability can be improved.

(2) In the Y-axis slide cover, each of the coating plates 37, 371 to 371 following the movement of the spindle head 16
375, 38, 381-385, in order to make the operation smooth, the adjacent covering plates 37, 371-375, 38, 3
It is necessary to choose the intervals 81-385 carefully. In the Y-axis slide cover of the present embodiment, the distance between the fixed covering unit 30 and each of the moving covering units 31 to 35 is such that the fixed rail 39 and the moving rails 391 to 391 during manufacturing are different.
Since it is determined by the widths of the support pieces 39a, 391a to 395a and the widths of the restriction pieces 39b, 391b to 395b, the time required for adjusting the distance between the adjacent movable coating units 31 to 35 when mounting to the machine tool is reduced. Can be omitted.

(3) Since the Y-axis slide cover of the present embodiment is in a state in which the first to fifth movable coating units 31 to 35 are irremovably accommodated in the fixed coating unit 30, the device is provided. The entire body does not become bulky, so that carrying work and the like can be easily performed.

(4) In this embodiment, the connection pins 42a to 42f at the six central portions of the pantograph link mechanism 36
Of the four pins 42b, 42c, 42 located in the middle
d and 42e are supported by concave pin support frames 45a to 45d of different sizes that can be stacked. Therefore, when the link mechanism 36 is in the contracted state, each connecting pin 4
The vertical pitch of 2a-42f can be set short, and the locking pieces 38a, 381a-
385a can be minimized, and the vertical stroke length of each covering plate can be increased.

(5) In the present embodiment, each of the covering plates 3
7, 371 to 375, the width in the Y-axis direction is set shorter as approaching the spindle head 16, and the pantograph link mechanism 36 adjusts the length of each connecting link 51, 53, 54 to each of the covering plates. The distance was gradually shortened as approaching the spindle head 16 corresponding to the movement distance in the Y-axis direction. For this reason, since each of the covering plates 371 to 375 operates in proportion to the link length, the amount of operation between the respective covering plates is adapted to the size of each of the covering plates, and the play in the actual work can be reduced. In addition, the weight of the cover itself can be reduced.

The above embodiment can be modified as follows. When the height of the lower portion of the spindle head 16 in the Y-axis direction cannot be increased, the width of each of the coating plates 38, 381 to 385 in the Y-axis direction is set to be longer as approaching the spindle head 16, and the pantograph link is provided. The link length of the mechanism 36 may be gradually increased as it approaches the spindle head 16.

Also in the case of this other embodiment, the minimum dimension when the cover is reduced can be reduced, and the number of covering plates to be stacked can be reduced. In the above-described embodiment, the number of the moving covering units 31 to 35 accommodated in the fixed covering unit 30 is five. However, if there is at least one moving covering unit, an arbitrary number of moving covering units can be appropriately selected. Therefore, for example, the number of moving covering units can be increased to 2 to 3 when the moving range of the spindle head 16 is small, and to 4 to 8 when the moving range is large.

In FIG. 11, the X-axis slide cover 2
The structure of No. 2 may be a metal bellows and may be provided with a pantograph link mechanism 36. In FIG. 11, a Z-axis rail may be provided on the column 14, the column pillar may be mounted on the Z-axis rail, and the spindle head 15 may be mounted so as to be able to reciprocate in the Z-axis direction (front-back direction).

In FIG. 11, the X-axis rail 13 may be omitted, the X-axis slide cover 22 may be used as a fixed cover, and the work table 18 may be supported so as to be able to reciprocate in the X-axis direction.

In FIG. 11, the left and right X-axis slide covers 22, 22 may be integrated with a connecting member, and a pantograph type link mechanism may be provided only on one side. -The Y-axis slide cover of the present invention does not particularly limit the shape of the X-axis slide cover and the components of the machine tool.

The technical idea related to the present invention will be described below. Technical Thought 1 In a slide cover of a machine tool in which each covering plate constituting an X-axis or Y-axis telescopic cover is connected by a pantograph-type link mechanism, a locking piece is formed to be bent at a right angle at an edge of each covering plate. Each locking piece is provided with a stepped concave pin support frame of a size that can be stacked in a reduced state of the cover, and each pin support frame is provided with a respective connection located at the center of the pantograph link mechanism. A slide cover of a machine tool on which pins are supported.

According to this technical concept 1, in the contracted state of the pantograph-type link mechanism, the vertical pitch of each connecting pin located at the center can be set short, and the interval between the locking pieces of each covering plate can be minimized. Therefore, the stroke length of each covering plate in the vertical direction can be increased.

[0048]

As described above in detail, according to the present invention, each coating plate can be slid at a high speed following the increase in the speed of the spindle head in the Y-axis direction, and noise can be reduced. it can. In addition, pantograph type link machine
In the contracted state of the frame, the connecting pins located in the center
The vertical pitch can be set short, and the
The spacing can be minimized, so that
The downward stroke length can be increased.

According to the second or third aspect of the present invention, the minimum size when the cover is reduced can be reduced, and the number of overlapping cover plates can be reduced .

[Brief description of the drawings]

FIG. 1 is a rear view of a Y-axis slide cover showing an embodiment embodying the present invention.

FIG. 2 is a partially omitted perspective view of the Y-axis slide cover as viewed from the rear side, showing a state where the spindle head has moved to a lowermost position.

FIG. 3 is a perspective view of the Y-axis slide cover as viewed from the front side, showing a state where the spindle head has moved to a lowermost position.

FIG. 4 is a vertical sectional view of a Y-axis slide cover showing a state where a spindle head has moved to a lowermost position.

FIG. 5 is a longitudinal sectional view of a Y-axis slide cover showing a state where a spindle head has moved to an uppermost position.

FIG. 6 is a perspective view showing a state in which a pair of fixed covering plates are connected to a fixed rail.

FIG. 7 is a perspective view showing a state in which first to fourth movable covering plates are connected to a movable rail.

FIG. 8 is a perspective view showing a state in which a fifth moving covering plate is connected to a movable rail.

FIG. 9 is a sectional view taken along line α-α of FIG. 1;

FIG. 10 is a sectional view taken along line β-β of FIG. 1;

FIG. 11 is a schematic plan view of a machine tool.

FIG. 12 is a schematic side view of the machine tool.

[Description of Signs] 11 ... bed, 14 ... column, 15 ... Y-axis saddle, 16
... Spindle head, 23 ... Y-axis slide cover, 24 ... Processing unit area, 25 ... Work area, 30 ... Fixed covering unit, 31-35 ... First to fifth moving covering unit, 36 ... Pantograph link mechanism, 37 ... upper fixed covering plate, 37a ... locking piece, 371-375 ... upper moving covering plate, 371a-375a ... locking piece, 38 ... lower fixed covering plate, 38a ... locking piece, 381-385 ... lower moving covering plate , 381a to 385a: locking piece, 39: fixed rail as connecting member, 39a: supporting piece, 39b: regulating piece, 3
91-395: Moving rail as connecting member, 391a
To 395a: support piece, 391b to 395b: control piece, K
1: Upper cover, K2: Lower cover.

Claims (3)

(57) [Claims] 1. A Y-axis saddle is provided on a column erected on a bed so as to be able to reciprocate up and down, a spindle head is mounted on the Y-axis saddle, and a plurality of coating plates are arranged above and below the spindle head. Y of a machine tool in which adjacent coated plates are always partially overlapped with each other, and the overlapping portion of each coated plate expands and contracts in the reciprocating direction with the vertical reciprocation of the spindle head. In the shaft slide cover, the uppermost covering plate is arranged at a position closest to the work area, and from the second or lower covering plate from the top to the lowermost covering plate, from the work area. Disposed stepwise, a pair of covering plates most distant from the spindle head are connected to each other by a connecting member extending in the Y-axis direction, and sequentially from the pair of covering plates most distant from the spindle head to the spindle head. Approaching The plates are connected to each other by respective connecting members, a window is formed between a pair of covering plates adjacent to the spindle head to allow the spindle head to protrude, and a lower portion located below the spindle head. Each cover plate constituting at least one of the cover plates constituting the cover or at least one of the cover plates constituting the upper cover is connected by a pantograph link mechanism , and the respective cover plates constituting the upper cover or the lower cover are formed. upon
A locking piece is formed at the end edge so as to be curved rearward at a right angle.
There is a step large enough to stack in the reduced state of the cover
A recessed pin support frame having a different floor is provided, and each pin support is provided.
The frame is located at the center of the pantograph link mechanism.
Y-axis slide cover of the machine tool on which each connecting pin is supported . 2. The apparatus according to claim 1, wherein each of the cover plates is set shorter in the Y-axis direction as the cover plate approaches the spindle head, and the pantograph-type link mechanism sets the length of each connection link to the Y-axis of each of the cover plates. The Y-axis slide cover of the machine tool, which is progressively shorter as it goes to the spindle head according to the length in the direction. 3. The pantograph-type link mechanism according to claim 1, wherein each of the covering plates is set longer in the Y-axis direction as approaching the spindle head. The Y-axis slide cover of the machine tool, which is gradually elongated as it goes to the spindle head according to the length in the direction .