JP2006123053A - Moving table and machine tool provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable moving table and a machine tool by which foreign matters falling from the top of the moving table are removed, and proper machining can be done to a workpiece. <P>SOLUTION: An X-axis moving table 6 has a Y-axis direction side face 6b. A Y-axis telescopic cover 26 and a Y-axis integrated cover 27 are provided with inclined parts 26b, 27b having inclined faces 26a, 27a, in which positions higher than the lowermost part 6b3 of the Y-axis direction side face 6b are made as the top sides 26e, 27e, and recessed parts 26d, 27d which are connected to the inclined parts 26b, 27b and recessed to a position lower than the lowermost part 6b3. The moving table 2 has a wiper 62 passing through groove parts 60, 61 formed between the Y-axis direction side face 6b and the inclined parts 26b, 27b in conjunction with the X-axis moving table 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a moving table on which a workpiece is placed and moved in the horizontal direction, and a machine tool including the moving table.

  2. Description of the Related Art Conventionally, as a machine tool for processing a workpiece, a moving table configured to be able to place the workpiece and move in the X axis direction and the Y axis direction orthogonal to each other in the horizontal direction, and to process the workpiece Therefore, the control axis is three axes including a head that is linearly driven in the Z-axis direction, which is the vertical direction, a column that rises perpendicular to the moving table, and a drive mechanism for the head attached to the column. Machine tools, for example vertical machining centers, are known.

  In this type of machine tool, an X-axis movement table that places a workpiece and moves in the X-axis direction, a Y-axis movement table that places an X-axis movement table and moves in the Y-axis direction, and a Y-axis A moving table that is attached to the moving table and includes an X-axis feeding mechanism that drives the X-axis moving table in the X-axis direction and a Y-axis feeding mechanism that drives the Y-axis moving table in the Y-axis direction is used. Such a moving table includes an X-axis protection cover for protecting the X-axis feed mechanism from foreign matters such as chips generated during processing of the workpiece, and a Y-axis protection cover for protecting the Y-axis feed mechanism. (For example, see Patent Document 1).

  In the moving table described in Patent Document 1, as shown in FIG. 20, an X-axis moving table 102 on which the workpiece 101 is mounted and moved in the X-axis direction, and an X-axis moving table 102 are mounted on the Y Y-axis moving table 103 that moves in the axial direction, X-axis protective cover 104 that protects the X-axis feed mechanism that drives X-axis moving table 102 in the X-axis direction, and Y-axis moving table 103 is driven in the Y-axis direction. A Y-axis protective cover 105 that protects the Y-axis feed mechanism and a column 108 that is fixed perpendicularly to the base 106 and supports the head 107 are provided. The X-axis protective cover 104 and the Y-axis protective cover 105 are telescopic covers that can expand and contract in the X-axis direction and the Y-axis direction, respectively, and are attached to both sides of the X-axis moving table 102 and the Y-axis moving table 103, respectively. The X-axis moving table 102 includes an upper surface 102a on which the workpiece 101 is placed, and a Y-axis direction side surface 102b formed vertically from the Y-axis direction end of the upper surface 102a toward the lower side. The entire moving table is covered with a splash cover (not shown).

  In this moving table, in order to reliably protect the Y-axis feed mechanism, the Y-axis protection cover 105 has one end on the side surface 103a of the Y-axis moving table 103 that is flush with the Y-axis direction side surface 102b of the X-axis moving table 102. The side is attached. In addition, in order to prevent interference between the X-axis movement table 102 and the Y-axis protection cover 105 when the X-axis movement table 102 moves in the X-axis direction, the upper surface of the Y-axis protection cover 105 is the Y-axis direction side surface 102b. The flat surfaces 105a, 105b, 105c are formed to be lower than the lowermost part 102b1.

  In this moving table, the X-axis protective cover 104 has one end in the X-axis direction fixed to a support member (not shown) and the other end fixed to the X-axis moving table 102. It expands and contracts in a state of always protruding in the X-axis direction.

Japanese Patent Laid-Open No. 9-207037 (see FIG. 6)

  As described above, in the moving table described in Patent Document 1, the upper surface of the Y-axis protective cover 105 is the flat surfaces 105a, 105b, and 105c. On the other hand, in order to shorten the processing time of the workpiece and reduce the processing cost, in this type of machine tool, in general, removal of foreign matters such as chips generated when processing the workpiece 101 is regularly performed. Absent. When these two factors overlap, foreign matter such as chips generated during processing of the workpiece 101 is deposited on the substantially flat upper surface of the Y-axis protective cover 105. When foreign matter accumulates on the upper surface of the Y-axis protection cover 105, the Y-axis movement table 103 is moved between the Y-axis movement table 103 and the column 108 or between the Y-axis movement table 103 and the splash cover by movement in the Y-axis direction. Foreign matter may be caught between them, and movement of the Y-axis movement table 103 may be hindered. For this reason, it is impossible to perform appropriate processing on the workpiece 101.

  Further, depending on the accumulation state of the foreign matter, the Y-axis moving table 103, the Y-axis feed mechanism, the Y-axis protective cover 105, etc. are damaged. For this reason, in the worst case, there is a problem that the movement table does not function, and the reliability of the apparatus is lowered.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a movable table and a machine tool that can remove foreign matters falling from a movable table, can perform appropriate processing on a workpiece, and have high reliability. There is.

  In order to solve the above-described problems, the present invention is configured to be movable in the X-axis direction and the Y-axis direction that are orthogonal to each other in the horizontal direction, and places an object to be moved and moves in the X-axis direction. A Y-axis movement table that mounts the X-axis movement table and moves in the Y-axis direction, an X-axis feed mechanism that is attached to the Y-axis movement table and drives the X-axis movement table in the X-axis direction, and a Y-axis X-axis movement in a movement table comprising a Y-axis feed mechanism for driving the movement table in the Y-axis direction, an X-axis protection cover for protecting the X-axis feed mechanism, and a Y-axis protection cover for protecting the Y-axis feed mechanism The table includes an upper surface on which the workpiece is placed, and a Y-axis direction side surface formed with the surface in the Y-axis direction below the upper surface, and the Y-axis protective cover is the outermost surface of the Y-axis direction side surface. An inclined part having an inclined surface with the top side at a position higher than the lower part; A concave portion connected to the inclined portion in the Y-axis direction and recessed to a position lower than the lowermost portion of the Y-axis direction side surface, and in the Y-axis direction, between the Y-axis direction side surface and the inclined portion. It is characterized by comprising a groove part formed with a recess and a wiper passing through the groove part in conjunction with the X-axis moving table.

  In the present invention, the Y-axis protective cover has an inclined surface whose top side is a position higher than the lowermost portion of the side surface in the Y-axis direction formed on the lower side of the upper surface of the X-axis moving table and facing the surface in the Y-axis direction. It has an inclined part. Therefore, the inclination of the inclined surface can be increased as compared with the conventional configuration. Accordingly, the foreign matter that has fallen on the inclined surface easily slides down the inclined surface, and the foreign matter on the inclined portion can be removed. The Y-axis protective cover includes a recess that is connected to the inclined portion in the Y-axis direction and is recessed to a position lower than the lowermost portion of the side surface in the Y-axis direction. A concave portion is disposed between the direction side surface and the inclined portion, and a groove portion is formed between the Y-axis direction side surface and the inclined portion. Therefore, when the X-axis moving table is moved in the X-axis direction, interference between the inclined portion having an inclined surface whose top is higher than the lowest part of the side surface in the Y-axis direction and the X-axis moving table is prevented. can do. Furthermore, since the moving table of the present invention includes a wiper that passes through the groove portion in conjunction with the X-axis moving table, the foreign matter dropped in the recess can be removed by the wiper. Therefore, it is possible to remove the foreign matter that has fallen into either the inclined portion or the concave portion. That is, the foreign matter on the Y-axis protective cover can be removed, the workpiece can be appropriately processed, and the reliability of the apparatus can be improved.

  Here, in the “top side” in this specification, in addition to the top side formed by a pair of inclined surfaces crossing each other, a flat surface on the upper surface side of the Y-axis protective cover so as to cross the pair of inclined surfaces. When the is formed, the top side formed by the intersection of the flat surface and the inclined surface is also included.

  In this invention, it is preferable that a recessed part is provided with the flat surface formed in the horizontal direction in the position lower than the lowest part of the Y-axis direction side surface. With this configuration, the gap between the wiper moving in the X-axis direction (horizontal direction) in conjunction with the X-axis moving table and the flat surface can be kept constant, and even fine foreign matters can be removed. It becomes possible.

  In the present invention, the Y-axis protective cover includes a step surface formed in the vertical direction between the inclined portion and the recess, and the wiper includes a side surface portion facing the step surface and a bottom surface portion facing the flat surface. It is preferable to provide. If comprised in this way, a foreign material can be removed more reliably.

  In the present invention, it is preferable that the cross section of the side surface portion in the direction opposite to the step surface is formed in a substantially triangular shape with the bottom side as the bottom. If comprised in this way, since the upper surface side of a side part turns into a slope, a foreign material will slide down a slope and it will become difficult to deposit a foreign material on a side part. Further, when the wiper passes through the groove, the inclined surface pushes up the foreign material upward, so that the foreign material can be prevented from being caught between the groove and the wiper.

  In the present invention, it is preferable that the groove portions include two wipers that are respectively formed on both sides of the X-axis moving table in the Y-axis direction and pass through the two groove portions. With this configuration, foreign matter can be removed on the Y-axis protective cover on both sides of the X-axis moving table in the Y-axis direction, and it is possible to perform more appropriate processing on the workpiece. High reliability.

  In the present invention, the wiper is preferably disposed at a substantially central position in the X-axis direction of the X-axis moving table. If comprised in this way, the foreign material which fell to the recessed part can be removed regardless of which direction the X-axis movement table moves.

  In the present invention, the wiper is preferably fixed to the X-axis moving table via a wiper mounting member formed so as to be always fitted in the groove within the movable range of the X-axis moving table. If comprised in this way, it can prevent that a big foreign material accumulates in a groove part by a wiper attachment member. Moreover, a small foreign material can be removed by the wiper.

  In the present invention, the X-axis moving table preferably includes a groove-shaped cover storage portion that is formed in the X-axis direction and opens downward, and is configured so that the X-axis protective cover can be stored in the cover storage portion. If comprised in this way, since an X-axis protective cover can be accommodated in an X-axis movement table, the width | variety of the X-axis direction of a movement table can be shortened. On the other hand, in the moving table described in Patent Document 1 described above, the X-axis protective cover 104 has one end in the X-axis direction fixed to a support member (not shown) and the other end fixed to the X-axis moving table 102. In addition, the width of the moving table in the X-axis direction cannot be shortened because it is expanded and contracted while always projecting from the X-axis moving table 102 in the X-axis direction. Here, in recent years, a processing line in which a single worker is in charge of operating a plurality of types of machine tools arranged side by side in the X-axis direction to process a workpiece has been widely adopted. There is a great need in the market for shortening the distance traveled by workers and reducing machining time and cost. If the structure of this invention is employ | adopted, the width | variety of the X-axis direction of a moving table can be shortened, and the width | variety of the X-axis direction of the machine tool provided with a moving table can be shortened by extension. As a result, the above-mentioned market needs can be met.

  In the present invention, the X-axis feed mechanism is slidably fitted to a long X-axis feed guide rail that guides the X-axis moving table in the X-axis direction and the lower side of the X-axis feed guide rail. An X-axis feed guide block, the X-axis feed guide block is shorter in the X-axis direction than the X-axis feed guide rail, and the X-axis feed guide rail is provided below the X-axis moving table. Preferably, the X-axis feed guide block is fixed to the Y-axis moving table, and the X-axis feed guide block is positioned below the X-axis moving table within the movable range of the X-axis moving table. Since the X-axis feed guide block slidably fitted to the lower side of the X-axis feed guide rail is positioned below the X-axis travel table within the movable range of the X-axis travel table, the X-axis feed guide Foreign matter does not fall on the sliding portion between the rail and the X-axis feed guide block. Therefore, the X-axis protective cover does not need to protect the sliding portion between the X-axis feed guide rail and the X-axis feed guide block, and the X-axis protective cover can be downsized. It becomes easy to store the shaft protection cover.

  In the present invention, the X-axis protective cover includes a fixed cover that is fixed to the Y-axis moving table, and includes a seal member that prevents foreign matter dropped on the fixed cover from entering the inside of the X-axis moving table. Is preferred. If comprised in this way, even if it is a case where the X-axis feed mechanism is arrange | positioned inside the X-axis movement table, the X-axis feed mechanism can be reliably protected.

  In the present invention, the X-axis protective cover preferably includes a telescopic cover that can expand and contract in the X-axis direction. If comprised in this way, the width | variety of the X-axis direction of a movement table can further be shortened.

  Further, according to the present invention, a machine tool including a head that processes the above-described moving table into a workpiece, and a column that is attached to a drive mechanism that rises perpendicularly to the moving table and drives the head in the vertical direction. Can be used. In this machine tool, foreign matter on the Y-axis protective cover falling from the moving table can be removed, the workpiece can be processed appropriately, and the reliability of the apparatus can be improved. .

  As described above, in the moving table and the machine tool according to the present invention, it is possible to remove foreign matters falling from the moving table, and it is possible to perform appropriate processing on the workpiece. In addition, the reliability of the apparatus can be increased.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

[Embodiment 1]
(Whole structure of machine tool)
FIG. 1 is an explanatory side view of a configuration of the machine tool 1 according to the first embodiment of the present invention as seen from the side in a partially transparent state. FIG. 2 is an explanatory front view of the machine tool 1 shown in FIG. 1 and 2 are explanatory diagrams for explaining the positional relationship of the constituent members of the machine tool 1, and are not drawings showing a certain cross section.

  As shown in FIGS. 1 and 2, the machine tool 1 according to the present embodiment includes a moving table 2 that feeds a workpiece (not shown) placed in the X-axis and Y-axis directions orthogonal to each other in the horizontal direction, Three axes mainly composed of a head 3 that is linearly driven in the vertical direction perpendicular to the X axis and the Y axis to process a workpiece, that is, the Z axis direction, and a column 4 that rises vertically from the moving table 2. This is a vertical machining center with the control axis as the control axis. In the description of the present embodiment, the left-right direction of the machine tool 1 (the vertical direction in FIG. 1) is the X-axis direction, the front-rear direction (left-right direction in FIG. 1) is the Y-axis direction, and the up-down direction (up-down direction in FIG. ) Is the Z-axis direction.

  The moving table 2 includes an X-axis moving table 6 for placing a workpiece and moving in the X-axis direction, a Y-axis moving table 7 for placing the X-axis moving table 6 and moving in the Y-axis direction, and Y And a base 8 on which the axis movement table 7 is placed. A detailed configuration of the movement table 2 will be described later.

  In FIG. 1, the column 4 includes a column lower portion 4b having a cover insertion hole 4a into which a right end of the Y-axis integrated cover 27 described later is inserted, and a column upper portion 4c formed on the column lower portion 4b. Yes. The column 4 rises vertically from the base 8 with the column lower portion 4b fixed to the right end of the base 8 in the figure. The column upper portion 4c is formed in a substantially U-groove shape opened on the left side in FIG. Through this opening, the base side of the head 3 moves up and down in the vertical direction.

  As shown in FIG. 2, parallel side surfaces for guiding the head 3 in the Z-axis direction (vertical direction) are provided on the side surfaces (left end surfaces in FIG. 1) formed on both sides in the X direction of the groove 4c1 of the column upper portion 4c. The Z-axis feed guide rail 32 is fixed. These Z-axis feed guide rails 32 are slidably fitted with Z-axis feed guide blocks (not shown) fixed to the head 3. The head 3 is guided in the Z-axis direction by the guide block.

  As shown in FIG. 1, bearing holding members 35 and 36 for holding two bearings 34 that rotatably support both ends of a Z-axis feed ball screw 33 that feeds the head 3 in the Z-axis direction are fixed to the groove 4c1. Has been. A Z-axis feed nut 37 held by the head 3 is screwed into the Z-axis feed ball screw 33. A Z-axis feed motor 38 that rotationally drives the Z-axis feed ball screw 33 is fixed to the upper end of the column upper portion 4c. The output shaft of the Z-axis feed motor 38 is connected to the upper end of the Z-axis feed ball screw 33 via a coupling 39. A Z-axis feed ball screw 33, a Z-axis feed nut 37, a Z-axis feed guide block, a Z-axis feed guide rail 32, a Z-axis feed motor 38, a bearing 34, and a coupling 39 move the head 3 in the Z-axis direction. A Z-axis feed mechanism is configured as a drive mechanism for linear drive.

  As shown in FIG. 1, the head 3 includes a processing mechanism 40 that processes a workpiece, a head main body 41 that forms a skeleton of the head 3, and a blower 42 that cools the head 3. . In this embodiment, the machining mechanism 40 includes a spindle 43 that holds a tool that contacts the workpiece, a spindle drive motor 44 that rotationally drives the spindle 43, and a coupling 45 that connects the spindle 43 to the spindle drive motor 44. It is composed of The spindle 43 is provided with a chucking mechanism 48 for holding a tool that abuts on the workpiece on the spindle 43 or for releasing the tool from the spindle 43. The head 3 also includes a chuck opening / closing cylinder 46 for bringing the chucking mechanism 48 into a holding state or a releasing state, and a connecting lever 47 for connecting the chucking mechanism 48 and the chuck opening / closing cylinder 46.

  As shown in FIG. 1, the head main body 41 includes a holding portion 41a that holds the machining mechanism 40, a driven portion 41b that is connected to a Z-axis feed mechanism that linearly drives the machining mechanism 40 in the Z-axis direction, and a holding portion. 41a and the connection part 41c which connects the to-be-driven part 41b are provided, and it is formed in the substantially rectangular parallelepiped shape as a whole.

  In the driven portion 41b, a nut holding portion 41b1 that holds the Z-axis feeding nut 37 is formed on the lower side of the head main body 41 so as to protrude outward in the Y direction (right side in FIG. 1). In addition, two guide block fixing surfaces (two guide block fixing surfaces) that fix the Z-axis feed guide block so as to sandwich the nut holding portion 41b1 in a part of the driven portion 41b that is the right end surface of the head body 41. (Not shown) is formed.

  As shown in FIG. 1, a chuck opening / closing cylinder 46 and a blower 42 are fixed to the upper surface of the connecting portion 41 c. A large cavity 41e extending in the horizontal direction is formed below the chuck opening / closing cylinder 46 and the blower 42, and a reinforcing rib 41c4 formed in the Z-axis direction is formed below the large cavity 41e. Yes. A small through hole 41f that communicates from the cavity 41e and penetrates to the bottom surface is formed in the lower half of the connecting portion 41c in which the reinforcing rib 41c4 is formed. That is, a through hole penetrating from the top surface to the bottom surface is formed in the coupling portion 41c by the cavity 41e and the small through hole 41f communicating with the cavity 41e.

  The holding portion 41a has the same configuration as that of the connecting portion 41c. The upper half is a hollow hollow portion 41a3 that communicates with the cavity 41e of the connecting portion 41c, and a rib is formed in the lower half. A cylindrical spindle holding portion 41a2 that holds the spindle 43 is formed below the hollow portion 41a3 so as to be surrounded by the ribs. In the lower half of the holding portion 41a on which the rib is formed, a passage hole (not shown) that communicates from the hollow portion 41a3 and penetrates to the bottom surface is formed. A spindle drive motor 44 is attached to the upper surface of the holding portion 41a.

  The blower 42 blows air from the upper surface side of the connecting portion 41 c to the inside of the head main body 41 when the workpiece is processed. The air blown from the blower 42 is a cooling fluid for cooling the head 3 when the workpiece is processed. The air blown from the blower 42 passes through the cavity 41e and the small through hole 41f formed in the connecting portion 41c from the top surface to the bottom surface. The air blown from the blower 42 enters the hollow portion 41a3, and passes through the passage hole from the hollow portion 41a3 toward the bottom surface.

  A predetermined tool is attached to the tip of the spindle 43. The tool attached to the tip of the spindle 43 is in contact with the workpiece and performs a predetermined machining on the workpiece.

(Configuration of moving table)
FIG. 3 is an explanatory side view of the main part of the moving table 2 shown in FIG. 1 as seen from the side in a partially transparent state. FIG. 4 is a front explanatory view seen from the front in a state where a part of the configuration of the X-axis feed mechanism for driving the X-axis moving table 6 shown in FIG. 1 in the X-axis direction is partially seen through. FIG. 5 is a side view showing the X-axis movement table 6 shown in FIG. FIG. 6 is a front view showing the X-axis movement table 6 shown in FIG. FIG. 7 is a perspective view showing the Y-axis telescopic cover 26 shown in FIG. 3 in a contracted state from the X-axis moving table 6 side. FIG. 8 is a perspective view showing the Y-axis integrated cover 27 shown in FIG. 3 from the X-axis moving table 6 side. 9A and 9B are diagrams showing the wiper 62 shown in FIG. 3, wherein FIG. 9A is a front view, FIG. 9B is a side view, and FIG. 9C is a top view. 3 and 4 are explanatory diagrams for explaining the positional relationship of the structural members such as the moving table 2 and are not drawings showing a certain cross section.

  As described above, the movement table 2 includes the X-axis movement table 6, the Y-axis movement table 7, and the base 8.

  On the upper surface of the base 8, two parallel Y-axis feed guide rails 9 (see FIG. 2) for guiding the Y-axis moving table 7 in the Y-axis direction, and the Y-axis moving table 7 in the Y-axis direction. Bearing holding members 12 and 13 that respectively hold two bearings 11 (see FIG. 1) that rotatably support both ends of the Y-axis feeding ball screw 10 (see FIG. 1) to be fed are fixed. A Y-axis feed motor 14 (see FIG. 1) for rotating the Y-axis feed ball screw 10 is fixed to one bearing holding member 13. The output shaft of the Y-axis feed motor 14 is connected to one end of the Y-axis feed ball screw 10 via a coupling 15 (see FIG. 1).

  The Y-axis moving table 7 has a substantially rectangular shape with the Y-axis direction as a short side and the X-axis direction as a long side when viewed from the Z-axis direction. Is formed. As shown in FIG. 3, the Y-axis moving table 7 is formed with two parallel Y-axis direction side surfaces 7a that face in the Y-axis direction.

  As shown in FIGS. 3 and 4, guide block fixing portions 7b are formed at four locations on the bottom surface of the Y-axis moving table 7, and each guide block fixing portion 7b has a guide block fixing portion 7b as shown in FIG. A Y-axis feed guide block 17 that is slidably fitted to the Y-axis feed guide rail 9 is fixed. The two Y-axis feed guide rails 9 and the four Y-axis feed guide blocks 17 guide the Y-axis moving table 7 in the Y-axis direction.

  As shown in FIG. 1, a nut holding portion 19 that holds a Y-axis feed nut 18 that is screwed into the Y-axis feed ball screw 10 is fixed to the bottom surface of the Y-axis moving table 7. A Y-axis moving table 7 is constituted by a Y-axis feeding ball screw 10, a Y-axis feeding nut 18, a Y-axis feeding guide block 17, a Y-axis feeding guide rail 9, a Y-axis feeding motor 14, a bearing 11 and a coupling 15. A Y-axis feed mechanism that linearly drives the motor in the Y-axis direction is configured.

  Two parallel X-axis feed guide rails 20 (see FIGS. 1 and 3) for guiding the X-axis movement table 6 in the X-axis direction are fixed to the upper surface side of the Y-axis movement table 7. In addition, two bearings 55 (see FIG. 4) that rotatably support both ends of the X-axis feed ball screw 21 (see FIG. 4) for sending the X-axis moving table 6 in the X-axis direction are respectively provided in the hollow interior. It is fixed. Further, in the Y-axis moving table 7, an X-axis feed motor 22 (see FIG. 4) for rotating the X-axis feed ball screw 21 is fixed to one X-axis direction end side (right end side in FIG. 4). Yes. The output shaft of the X-axis feed motor 22 is connected to one end of the X-axis feed ball screw 21 via a coupling 56 (see FIG. 4).

  As shown in FIG. 3, one end of a Y-axis telescopic cover 26 and one end of a Y-axis integrated cover 27 are fixed to the two Y-axis direction side surfaces 7a of the Y-axis moving table 7 as shown in FIG. Y-axis protective cover fixing surface.

  The X-axis moving table 6 has a substantially rectangular shape with the Y-axis direction as a short side direction and the X-axis direction as a long-side direction when viewed from the Z-axis direction. Is formed. In the present embodiment, as shown in FIG. 3, the width in the Y direction of the X-axis movement table 6 is substantially the same as the width in the Y-axis direction of the Y-axis movement table 7.

  Further, as shown in FIG. 5 and the like, the X-axis moving table 6 includes an upper surface 6a on which the workpiece is placed, and two parallel surfaces that face the Y-axis direction outward from the center below the upper surface 6a. Two Y-axis direction side surfaces 6b are formed. In this embodiment, the two Y-axis direction side surfaces 6b are formed so as to be orthogonal to the Y-axis, and the Y-axis direction side surface 6b includes a fixed surface 6b1 to which a wiper mounting member 63 described later is fixed, and a fixed surface 6b1. To the center side of the X-axis moving table 6 and a flank 6b2 lowered by one step. The lowermost part 6b3 of the flank 6b2 is the lowermost part of the Y-axis direction side face 6b.

  As shown in FIGS. 4 and 5, guide block fixing portions 6 c are formed at four locations on the bottom surface of the X axis moving table 6, and each of the guide block fixing portions 6 c has an X axis feed guide rail 20. An X-axis feed guide block 23 that is slidably fitted from above is fixed. The X-axis feed guide block 23 is shorter than the X-axis feed guide rail 20 by about 1/5 in the X-axis direction. Two X-axis feed guide rails 20 and four X-axis feed guide blocks 23 guide the X-axis moving table 6 in the X-axis direction. Further, as shown in FIG. 4 and the like, the X-axis moving table 6 is formed with two parallel X-axis side surfaces 6d that face the X-axis direction outward from the center portion below the upper surface 6a. One end of X-axis telescopic covers 28 and 29 serving as an X-axis protective cover, which will be described later, is fixed to the side surface in the direction.

  As shown in FIGS. 4 and 5, a nut holding portion 24 that holds an X-axis feed nut 57 that is screwed with the X-axis feed ball screw 21 is fixed to the bottom surface of the X-axis moving table 6. Yes. The X-axis moving table 6 is constituted by the X-axis feeding ball screw 21, the X-axis feeding nut 57, the X-axis feeding guide block 23, the X-axis feeding guide rail 20, the X-axis feeding motor 22, the bearing 55 and the coupling 56. An X-axis feed mechanism that linearly drives the motor in the X-axis direction is configured.

  As shown in FIGS. 1 and 3, the moving table 2 has a Y-axis feed mechanism for removing foreign matter such as chips generated on the workpiece on both sides of the Y-axis moving table 7 and the X-axis moving table 6 in the Y-axis direction. A Y-axis telescopic cover 26 and a Y-axis integrated cover 27 are provided as Y-axis protective covers. More specifically, the moving table 2 includes a Y-axis integrated cover 27 on the right side (the side on which the column 4 is provided) of the Y-axis moving table 7 in FIG. A telescopic cover 26 is provided.

  As shown in FIG. 7, the Y-axis telescopic cover 26 has a fixed cover 26 i and a plurality of movable covers 26 j and is configured to be extendable and contractible in the Y-axis direction. It is formed in a substantially triangular groove shape that opens downward. In this embodiment, as shown in FIG. 3, the outer shape of the movable cover 26 j is configured to decrease toward the Y-axis movement table 7.

  In the Y-axis telescopic cover 26, as shown in FIGS. 3 and 7, each of the fixed cover 26i and each movable cover 26j includes a pair of inclined surfaces 26a, and a portion where these inclined surfaces 26a exist is provided. It becomes the inclined part 26b. The movable cover 26j disposed at one end of the Y-axis telescopic cover 26 (the left end in FIG. 7) is formed with a flat surface 26c in the horizontal direction so as to intersect with the pair of inclined surfaces 26a. The portion having the concave portion 26d is connected to the inclined portion 26b in the Y-axis direction. Note that the intersection of the pair of inclined surfaces 26a included in each of the fixed cover 26i and each movable cover 26j is the apex 26e. In this embodiment, the pair of inclined surfaces 26a is viewed from the Y-axis direction. , The apex 26e is apex and formed with an equal length.

  The Y-axis telescopic cover 26 has a step surface 26f formed so as to rise in a vertical direction from the flat surface 26c between the inclined portion 26b and the recess 26d, and a flange formed on the side where the recess 26d is disposed. A first mounting portion 26g having a shape and a second mounting portion 26k having a hook shape formed on the fixed cover 26i side are provided. Furthermore, each of the fixed cover 26i and each movable cover 26j includes a pair of vertical portions 26h having vertical surfaces connected to the pair of inclined surfaces 26a on the opening side (lower side).

  Further, as shown in FIG. 2, the Y-axis telescopic cover 26 includes a pair of pantographs 59 so that each movable cover 26j moves evenly in the Y-axis direction.

  As shown in FIG. 3, each apex 26 e is formed at a position higher than the lowest part 6 b 3 of the Y-axis direction side surface 6 b of the X-axis moving table 6. Further, the flat surface 26c is formed at a position lower than the lowermost part 6b3. That is, the concave portion 26d is formed so as to be recessed so that the flat surface 26c serving as the bottom surface is at a position lower than the lowermost portion 6b3. In this embodiment, each apex 26e is formed at a position lower than the upper surface 6a of the X-axis moving table 6.

  As shown in FIG. 8, the Y-axis integrated cover 27 is formed in a substantially triangular groove shape opened to the lower side, like the Y-axis telescopic cover 26, and includes an inclined portion 27 b having a pair of inclined surfaces 27 a. Yes. A flat surface 27c is formed in the horizontal direction so as to intersect with the pair of inclined surfaces 27a on one end side (the left end side in FIG. 8) of the Y-axis integrated cover 27, and the portion having the flat surface 27c is the Y-axis. It becomes the recessed part 27d connected with the inclination part 27b by the direction. The intersecting side of the pair of inclined surfaces 27a is the apex side 27e. In this embodiment, the pair of inclined surfaces 27a have the same length with the apex side 27e as the apex when viewed from the Y-axis direction. Is formed.

  Further, the Y-axis integrated cover 27 has a stepped surface 27f formed so as to rise vertically from the flat surface 27c between the inclined portion 27b and the recessed portion 27d, and one end side where the recessed portion 27d is disposed (see FIG. 8). And a hook-shaped attachment portion 27g formed on the left end side). Further, the Y-axis integrated cover 27 includes a pair of vertical portions 27h having a vertical surface formed to be connected to the pair of inclined surfaces 27a on the opening side (lower side).

  As shown in FIG. 3, the apex side 27 e is formed at a position higher than the lowermost part 6 b 3 of the Y-axis direction side surface 6 of the X-axis moving table 6. The flat surface 27c is formed at a position lower than the lowermost part 6b3. That is, the concave portion 27d is formed so as to be recessed so that the flat surface 27c serving as the bottom surface thereof is positioned lower than the lowermost portion 6b3. In this embodiment, the top side 27e is formed at a position lower than the upper surface 6a of the X-axis moving table 6.

  The Y-axis telescopic cover 26 has a second mounting portion 26 k fixed to the base 8, and a first mounting portion 26 g fixed to one Y-axis direction side surface 7 a of the Y-axis moving table 7. It expands and contracts by movement. On the other hand, in the Y-axis integrated cover 27, the mounting portion 27 g is fixed to the other Y-axis direction side surface 7 a of the Y-axis moving table 7, and the Y-axis integrated cover 27 moves in the Y-axis direction together with the Y-axis moving table 7. It is supposed to be. Further, the right end side in FIG. 3 of the Y-axis integrated cover 27 is in a state of being inserted into a cover insertion hole 4 a formed in the column 4. As shown in FIGS. 1 and 2, the Y-axis telescopic cover 26 and the Y-axis integrated cover 27 allow the Y-axis feed ball screw 10, the Y-axis feed nut 18, the Y-axis feed guide block 17, and the Y-axis feed. The Y-axis feed mechanism such as the guide rail 9, the Y-axis feed motor 14, the bearing 11, and the coupling 15 is protected.

  In a state where the Y-axis telescopic cover 26 is fixed to the Y-axis movement table 7, one Y-axis direction side surface 7a of the Y-axis movement table 7, one Y-axis direction side surface 6b of the X-axis movement table 6, and the inclined portion 26b A recess portion 26d is disposed between the Y-axis direction side surfaces 6b and 7a and the inclined portion 26b. The groove 60 is a space in which one of wipers 62 described later moves. Similarly, in a state where the Y-axis integral cover 27 is fixed to the Y-axis moving table 7, the other Y-axis side surface 7a of the Y-axis moving table 7 and the other Y-axis direction side surface 6b of the X-axis moving table 6, A concave portion 27d is disposed between the inclined portion 27b and a groove portion 61 is formed between the Y-axis direction side surfaces 6b and 7a and the inclined portion 27b. The groove 61 is a space in which one of the wipers 62 described later moves.

  The moving table 2 is configured such that the wipers 62 fixed to both ends in the Y-axis direction of the X-axis moving table 6 pass through these groove portions 60 and 61. As shown in FIGS. 3 and 5, the two wipers 62 are respectively fixed to the X-axis moving table 6 via a wiper mounting member 63.

  As shown in FIG. 9, each wiper 62 has two inclined surfaces 62d on the upper surface side and a thin flat side surface portion 62a formed in a substantially triangular shape, and protrudes to one side so as to be orthogonal to the side surface portion 62a. In this state, two bottom surfaces 62b having a rectangular parallelepiped shape with small pieces formed at both ends on the bottom surface side are provided.

  The side surface portion 62a is formed with three screw holes 62c for attachment to the wiper attachment member 63 so as to correspond to the three apexes of the triangle. Further, in the side surface portion 62a in the present embodiment, the two inclined surfaces 62d have substantially the same length. Note that the lengths of the two slopes 62d are not necessarily equal.

  As shown in FIGS. 5 and 6, the wiper mounting member 63 is a plate-like member formed in an elongated shape elongated in the X-axis direction, and a fixing portion 63 a for fixing to the X-axis moving table 6. The attachment portion 63b of the wiper 62 formed substantially parallel to the fixing portion 63a and spaced from the fixing portion 63a in the Y-axis direction is connected to the fixing portion 63a and the attachment portion 63b, and the attachment portion 63b is connected. And an inclined portion 63c that is inclined so as to be gradually lowered toward the center. In this embodiment, both ends in the X-axis direction of the attachment portion 63b and the inclined portion 63c are in a state of protruding outward from both sides in the X-axis direction of the fixing portion 63a. Further, as shown in FIGS. 5 and 6, the wiper mounting member 63 is connected to the mounting portion 63b and extends in the Y-axis direction toward the X-axis moving table 6 as shown in FIGS. A side surface portion 63e perpendicular to the X-axis direction that is connected and extends downward is formed. More specifically, as shown in FIG. 5, the two side surface parts 63e are formed from the mounting part 63b to the position where the fixing part 63 is formed in the Y-axis direction as viewed from the X-axis direction, and in the Z-axis direction. Then, it forms from the inclined part 63c to the lower end position of the attachment part 63b.

  As shown in FIG. 6, the attachment portion 63b has attachment holes 63d of the wiper 62 formed at three locations so as to correspond to the screw holes 62c. This mounting hole 63d is a long hole in the Z-axis direction so that the position of the wiper 62 in the Z-axis direction can be adjusted, and is formed at a substantially central position in the X-axis direction of the wiper mounting member 63. . In addition, two concave notches 63e are formed in the mounting portion 63b at positions corresponding to the two bottom surface portions 62b of the wiper 62, and the wiper 62 and the wiper are attached when the position of the wiper 62 in the Z-axis direction is adjusted. Interference with the member 63 is prevented. Note that both ends in the X-axis direction of the mounting portion 63 b of the wiper mounting member 63 protrude outward from the X-axis moving table 6 in the X-axis direction.

  As shown in FIG. 6, the wiper 62 is fixed at a substantially central position in the X-axis direction of the wiper mounting member 63. The wiper 62 is also fixed to the X-axis moving table 6 at a substantially central position in the X-axis direction.

  In addition, as shown in FIG. 3, in the two wipers 62 fixed to both sides in the Y-axis direction of the X-axis moving table 6 via the wiper mounting members 63, the side surfaces 62 a are stepped surfaces of the Y-axis telescopic cover 26. 26f and the step surface 27f of the Y-axis integrated cover 27 are opposed to each other, and the cross section of the side surface portion 62a facing the step surfaces 26f and 27f has a substantially triangular shape with the bottom side as the bottom. Further, in the two wipers 62, the bottom surface portion 62b is opposed to the flat portion 26c of the Y-axis telescopic cover 26 and the flat portion 27c of the Y-axis integrated cover 27, respectively.

  In this embodiment, the gap between the side surface portion 62a and the step surfaces 26f and 27f is 5 mm or less. More specifically, this gap is 1 to 2 mm. Similarly, the gap between the bottom surface portion 62b and the flat portions 26c and 27c is 5 mm or less. More specifically, this gap is 1 to 2 mm. The gap between the side surface portion 62a and the step surfaces 26f and 27f can be adjusted by inserting a shim between the mounting portion 63b of the wiper mounting member 63 and the side surface portion 62a of the wiper 62, and the bottom surface portion 62b. And the flat portions 26 c and 27 c can be adjusted by an attachment hole 63 d formed in the long hole of the wiper attachment member 63.

  Further, when the wiper mounting member 63 is fixed to the X-axis moving table 6, it is fitted into the groove portions 60 and 61 as shown in FIG. In particular, in this embodiment, the wiper mounting member 63 is fitted into the groove portions 60 and 61 within the movable range of the X-axis moving table 6 in the X-axis direction.

  The state shown in FIG. 1 is a substantially central position of the Y-axis movement table 7. From the state shown in FIG. 1, the Y-axis movement table 7 on which the X-axis movement table 6 is placed moves in the horizontal direction in the figure. ing. When moving in the right direction in the figure, the Y-axis telescopic cover 26 in which the second mounting portion 26k is fixed to the base 8 and the first mounting portion 26g is fixed to the Y-axis moving table 7 is arranged in the Y-axis direction (see FIG. 1 to the right) to protect the Y-axis feed mechanism such as the Y-axis feed ball screw 10. When the Y-axis moving table 7 moves to the right in the figure, the Y-axis integrated cover 27 fixed to the Y-axis moving table 7 protects the Y-axis feeding mechanism such as the Y-axis feeding motor 14 while protecting the Y-axis. It moves to the right in the figure together with the moving table 7 and is gradually inserted into the cover insertion hole 4 a of the column 4.

  Further, when the Y-axis moving table 7 moves to the left in FIG. 1, the Y-axis telescopic cover 26 is contracted so as to be folded, and the Y-axis integrated cover 27 is pulled out from the column 4. Even when the Y-axis moving table 7 is moved to the left end in FIG. 1, the Y-axis integrated cover 27 is not completely pulled out from the column 4, thereby The Y-axis feed mechanism such as the feed motor 14 is appropriately protected.

  Further, as shown in FIG. 2, the moving table 2 is an X-axis protective cover that protects the X-axis feed mechanism from foreign matter such as chips generated when processing the workpiece on both sides in the X direction of the X-axis moving table 6. X-axis telescopic covers 28 and 29 are provided.

  Each of the X-axis telescopic covers 28 and 29 has a fixed cover and a plurality of movable covers, and is configured to be extendable and contractible in the X-axis direction. Further, in the X-axis telescopic covers 28 and 29, as shown in FIG. 1, the fixed cover and each movable cover are provided with a pair of inclined surfaces having a gentle inclination on the upper surface, and in a substantially square groove shape opened downward. Is formed. Furthermore, as shown in FIG. 2, the X-axis telescopic covers 28 and 29 are configured such that the outer shape of the movable cover becomes smaller toward the outside in the X-axis direction. Further, as shown in FIG. 2, each of the X-axis telescopic covers 28 and 29 is provided with pantographs 64 and 65 so that the movable cover can be moved in the X-axis direction evenly.

  In FIG. 2, in the X-axis telescopic cover 28 located on the left side in the drawing, the right end in the drawing is fixed to one X-axis direction side surface 6 d of the X-axis moving table 6, and the left end in the drawing is a bracket 30 attached to the Y-axis moving table 7. It is fixed to. On the other hand, in FIG. 2, in the X-axis telescopic cover 29 located on the right side in the figure, the left end in the figure is fixed to the other X-axis direction side surface 6d of the X-axis movement table 6, and the right end in the figure is attached to the Y-axis movement table 7. It is fixed to the bracket 31.

  The state shown in FIG. 2 is the leftward movement limit of the X-axis moving table 6. At this time, the X-axis telescopic cover 28 is contracted, the X-axis telescopic cover 29 is extended, and the X-axis feed mechanism Is supposed to protect. 2, when the X-axis moving table 6 moves to the right in the figure, the X-axis telescopic cover 28 extends to protect the X-axis feed mechanism, and the X-axis telescopic cover 29 contracts to the X-axis feed. It is designed to protect the mechanism.

  When the X-axis movement table 6 moves in the X-axis direction, the wiper 62 passes through the grooves 60 and 61 in conjunction with the X-axis movement table 6. As described above, within the movable range of the X-axis moving table 6, the wiper mounting member 63 is always fitted into the groove portions 60 and 61, so that a large foreign object falls into the groove portions 60 and 61. There is no. Even if a small foreign matter falls from the gap into the grooves 60 and 61, the foreign matter is removed by the wiper 62 that works together with the X-axis moving table 6. Since the wiper mounting member 63 includes the inclined portion 63c that is inclined toward the mounting portion 63b, that is, the outer side in the Y-axis direction, the wiper mounting member 63 extends from the upper surface 6a of the X-axis moving table 6. The foreign matter that has fallen above 63 does not slide off from the wiper mounting member 63 by the inclined portion 63 c and accumulate on the wiper mounting member 63.

(Main effects of this form)
As described above, in the moving table 2 of this embodiment, the Y-axis telescopic cover 26 and the Y-axis integrated cover 27 as the Y-axis protective cover are lower than the lowermost part 6b3 of the Y-axis direction side surface 6b of the X-axis moving table 6. Inclined portions 26b and 27b having inclined surfaces 26a and 27a with the top positions 26e and 27e at the high positions are provided. Therefore, the inclination angle of the inclined surfaces 26a and 27a can be increased as compared with the conventional protective cover. Therefore, the foreign matter that has fallen onto the inclined surfaces 26a, 27a from the X-axis moving table 6 easily slides down the inclined surfaces 26a, 27a, and the foreign matters can be removed by the inclined portions 26b, 27b.

  The Y-axis telescopic cover 26 and the Y-axis integrated cover 27 are recessed portions that are connected to the inclined portions 26b and 27b in the Y-axis direction and are recessed to a position lower than the lowermost part 6b3 of the Y-axis direction side surface 6b. 26d, 27d. Further, in the Y-axis direction, recesses 26d and 27d are disposed between the Y-axis direction side surface 6b and the inclined portions 26b and 27b, and a groove portion 60 is provided between the Y-axis direction side surface 6b and the inclined portions 26b and 27b. , 61 are formed. Therefore, when the X-axis moving table 6 moves in the X-axis direction, the inclined portions 26b and 27b whose top sides 26e and 27e are higher than the lowermost part 6b3 of the Y-axis direction side surface 6b, and the X-axis moving table 6 can be prevented.

  Furthermore, since the moving table 2 of the present embodiment includes the wiper 62 that passes through the groove portions 60 and 61 in conjunction with the X-axis moving table 6, foreign matter that has fallen into the groove portions 60 and 61 can be removed by the wiper 62. it can. Further, the foreign matter that has dropped from above the X-axis moving table 6 to above the wiper mounting member 63 does not slide off the wiper mounting member 63 by the inclined portion 63c and does not accumulate on the wiper mounting member 63.

  As described above, in the moving table 2 according to the present embodiment, foreign matter that has fallen into any of the wiper mounting member 63, the inclined portions 26b and 27b, and the concave portions 26d and 27d does not accumulate thereon. . That is, the foreign matter on the Y-axis telescopic cover 26 and the Y-axis integrated cover 27 as the Y-axis protective cover can be removed, the workpiece can be appropriately processed, and the reliability of the apparatus can be improved. Can be increased.

  In the present embodiment, the recesses 26d and 27d include flat surfaces 26c and 27c formed in the horizontal direction at a position lower than the lowermost portion 6b3 of the Y-axis direction side surface 6b. Therefore, the gap between the wiper 62 that moves in the X-axis direction in conjunction with the X-axis moving table 6 and the flat surfaces 26c and 27c can be kept constant, and the foreign matter that falls into the recesses 26d and 27d is fine. Even if it exists, it can be removed.

  In this embodiment, the wiper 62 includes a side surface portion 62a facing the step surfaces 26f and 27f formed on the Y-axis telescopic cover 26 and the Y-axis integrated cover 27, and a bottom surface portion 62b facing the flat surfaces 26c and 27c. ing. Therefore, it is possible to more reliably remove the foreign matter that has dropped into the grooves 60 and 61. In particular, in this embodiment, the clearance between the side surface portion 62a and the stepped surfaces 26f and 27f and the clearance between the bottom surface portion 62b and the flat portions 26c and 27c are 5 mm or less, so that foreign matters can be reliably removed.

  In this embodiment, the cross section of the side surface portion 62a facing the step surfaces 26f and 27f is formed in a substantially triangular shape with the bottom side as the bottom side. For this reason, since the upper surface side of the side surface portion 62a becomes the slope 62d, the foreign matter slides down the slope 62d, and the foreign matter is less likely to accumulate on the side surface portion 62a. Further, when the wiper 62 passes through the groove portions 60, 61, the inclined surface 62 d pushes up the foreign matter upward, so that foreign matter can be prevented from being caught between the groove portions 60, 61 and the wiper 62.

  In this embodiment, two wipers 62 are provided on both sides of the X-axis moving table 6 in the Y-axis direction. Therefore, foreign matter can be removed on both sides of the X-axis moving table 6 in the Y-axis direction. In this embodiment, the wiper 62 is disposed at a substantially central position in the X-axis direction of the X-axis moving table 6. Therefore, even if the X-axis moving table 6 moves in any of the X directions, the foreign matter that has fallen into the recesses 26d and 27d can be removed.

  In this embodiment, the wiper 62 is fixed to the X-axis moving table 6 via a wiper mounting member 63 formed so as to be fitted into the grooves 60 and 61 at all times within the movable range of the X-axis moving table 6. Therefore, even when the X-axis moving table 6 does not move, the wiper mounting member 63 can prevent a large foreign matter from dropping into the groove portions 60 and 61. Further, the small foreign matter that has fallen into the grooves 60 and 61 can be removed by the wiper 62.

[Embodiment 2]
(Configuration of moving table)
FIG. 10 is an explanatory side view of the main part of the moving table 72 according to the second embodiment of the present invention as seen from the side in a partially transparent state. FIG. 11 is a front explanatory view seen from the front in a state where a part of the configuration of the main part of the moving table 72 when the X-axis moving table 76 shown in FIG. 10 is located at one end of the movable range is seen through. FIG. 12 is a front explanatory view seen from the front in a state where a part of the configuration of the main part of the moving table 72 when the X-axis moving table 76 shown in FIG. 10 is located at the other movable range end is seen through. FIG. 13 is an explanatory side view of the main part of the moving table 72 shown in FIG. 10 as seen from the side opposite to that in FIG. FIG. 14 is a front view showing the X-axis movement table 76 and the Y-axis movement table 77 shown in FIG. FIG. 15 is a side view showing the X-axis movement table 76 shown in FIG. 16 is a cross-sectional view showing an EE cross section in FIG. 15. FIG. 17 is a side view showing the relationship between the X-axis moving table 76 and the X-axis integrated cover 89 from the FF direction of FIG. 18 is a side view showing the relationship between the X-axis moving table 76, the X-axis telescopic cover 88, and the fixed cover 91 from the GG direction of FIG. 10 to 13 are explanatory views for explaining the positional relationship of the constituent members of the main part of the moving table 72, and are not drawings showing a certain cross section.

  The main difference between the moving table 2 according to the first embodiment and the moving table 72 according to the second embodiment is the configuration of the X-axis moving table 77 and the X-axis protective cover. Below, it demonstrates centering on this difference, and the description is abbreviate | omitted or simplified about a common structure. Also, in the configurations illustrated in FIGS. 10 to 18, the same configurations as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified. 11 and 12 and the like, the wiper 62 and the wiper mounting member 63 described in the first embodiment are omitted for convenience of explanation, but the moving table 72 according to the second embodiment is also shown in FIG. In addition, a wiper 62 and a wiper mounting member 63 are provided as in the first embodiment.

  As shown in FIG. 10, the moving table 72 of the present embodiment has an X-axis moving table 76 on which a workpiece is placed and moves in the X-axis direction, and an X-axis moving table 76 is placed on the workpiece in the Y-axis direction. And a Y-axis moving table 77 that moves.

  Similarly to the first embodiment, the Y-axis moving table 77 has a substantially rectangular shape with the Y-axis direction as the short side direction and the X-axis direction as the long-side direction when viewed from the Z-axis direction. It is formed in a hollow box shape with an upper surface side opened.

  In the Y-axis moving table 77, as shown in FIGS. 10 and 14, an X-axis feed guide block 23 is fixed on the upper surface side thereof. More specifically, as shown in FIG. 10, when viewed from the X-axis direction, two X-axis feed guide blocks 23 are fixed to both ends of the upper surface, and as shown in FIG. 14, the Y-axis direction is fixed. When viewed from above, two X-axis feed guide blocks 23 are fixed above the nut holding portion 19 symmetrically with respect to the center line in the X-axis direction of the nut holding portion 19. That is, four X-axis feed guide blocks 23 are fixed to the upper surface side of the Y-axis feed table 77.

  As shown in FIG. 12, as in the first embodiment, two bearings 55 that rotatably support both end sides of the X-axis feed ball screw 21 are fixed inside the hollow interior of the Y-axis moving table 77, respectively. The X-axis feed motor 22 is fixed to one end in the X-axis direction (the right end in FIG. 12).

  When viewed from the Z-axis direction, the X-axis moving table 76 has a substantially rectangular shape with the Y-axis direction as the short side direction and the X-axis direction as the long-side direction, and is formed in a substantially square groove shape with an open bottom surface. More specifically, as shown in FIG. 16, a groove-shaped first cover housing that extends in the X-axis direction while being opened downward on one side in the X-axis direction of the nut holding portion 24 protruding to the bottom surface side. A second cover storage portion 76g is formed on the portion 76f and the other side. An X-axis telescopic cover 88 as an X-axis protection cover described later is stored in the first cover storage portion 76f, and an X-axis integrated cover 89 as an X-axis protection cover described later is stored in the second cover storage portion 76g. It has come to be.

  A protective cover mounting surface 76h extending in the direction perpendicular to the X axis is formed at the root of the nut holding portion 24. More specifically, as shown in FIG. 16, a protective cover mounting surface 76 h is formed on the left side of the root portion of the nut holding portion 24. One end of the X-axis telescopic cover 88 is fixed to the protective cover mounting surface 76h.

  As shown in FIGS. 10 and 14, two parallel X-axis feed guide rails 20 are fixed to the bottom surface of the X-axis moving table 76. An X-axis feed guide block 23 is slidably fitted to the X-axis feed guide rail 20. That is, as shown in FIG. 10 and the like, the X-axis feed guide block 23 is slidably fitted to the lower side of the X-axis feed guide rail 20. The two X-axis feed guide rails 20 and the four X-axis feed guide blocks 23 guide the X-axis moving table 76 in the X-axis direction. The two X-axis feed guide rails 20 and the four X-axis feed guide blocks 23 are always fitted within the movable range of the X-axis moving table 76. As shown in FIG. 14, the two X-axis feed guide rails 20 have a length that substantially matches the width of the X-axis moving table 76 in the X-axis direction. Therefore, all four X-axis feed guide blocks 23 are located below the X-axis movement table 76 within the movable range of the X-axis movement table 76.

  In this embodiment, the moving table 72 includes an X-axis telescopic cover 88 and an X-axis integrated cover 89 as X-axis protective covers. More specifically, the moving table 72 includes an X-axis telescopic cover 88 on the left side of the X-axis moving table 76 and an X-axis integrated cover 89 on the right side of the X-axis moving table 76 in FIG. The X-axis telescopic cover 88 has one end (right end in FIG. 11) fixed to the X-axis movement table 76 and the other end (left end in FIG. 11) fixed to a fixed cover 91 attached to the Y-axis movement table 77. The X-axis moving table 76 is expanded and contracted. The X-axis integrated cover 89 is fixed to the Y-axis moving table 77. The fixed cover 91 is also a constituent element of the X-axis protective cover.

  The X-axis telescopic cover 88 has the same basic configuration as the X-axis telescopic covers 28 and 29 of the first embodiment, and also includes a pantograph 90 as with the X-axis telescopic covers 28 and 29. The X-axis telescopic cover 88 has a first attachment portion 88a formed at one end (the right end in FIG. 11) and a second attachment portion 88b formed at the other end (the left end in FIG. 11). The first attachment portion 88 a is fixed to the protective cover attachment surface 76 h of the X-axis moving table 76, and the second attachment portion 88 b is fixed to an X-direction side portion 91 a described later formed on the fixed cover 91.

  The X-axis telescopic cover 88 of this embodiment is smaller than the X-axis telescopic covers 28 and 29, and the width of the X-axis telescopic cover 88 in the Y-axis direction constitutes an X-axis feed mechanism as shown in FIG. The minimum width is enough to cover the X-axis feed ball screw 21 and the bearing 55 and the like. Further, as shown in FIG. 11 and the like, the X-axis telescopic cover 88 is housed in the first cover housing portion 76f of the X-axis moving table 76.

  As shown in FIGS. 11 and 18, the fixed cover 91 has an X-direction side surface portion 91 a formed at the left end of FIG. 11 so that the plane portion is orthogonal to the X axis, and the plane portion is orthogonal to the Y axis. Thus, two Y-direction side surface portions 91 b formed on both sides of the X-direction side surface portion 91 a and an upper surface portion 91 c are provided, and the right end in FIG. 11 is fixed to the Y-axis moving table 77. A slit 91d is formed at the center position in the Y-axis direction of the upper surface portion 91c so as to extend in the X-axis direction. As the X-axis moving table 76 moves, the X-axis feed nut 57 held by the nut holding part 24 passes through the slit 91d, and the X-axis telescopic cover 88 expands and contracts. The slit 91d is covered from above. Further, the bottom surface of the X-axis moving table 76 passes above the upper surface portion 91c. Note that the lower surface of the fixed cover 91 is open. Further, the width of the fixed cover 91 in the Y-axis direction is substantially the same as the width of the X-axis moving table 76 in the Y-axis direction.

  As shown in FIGS. 12, 17, etc., the X-axis integrated cover 89 has an X-direction side surface portion 89a formed at the right end of FIG. 12 so that the plane portion is orthogonal to the X-axis, and a plane portion on the Y-axis. Are provided with two Y-direction side surface portions 89b formed on both sides of the X-direction side surface portion 89a so as to be orthogonal to each other, and an upper surface portion 89c. Further, in the X-axis integrated cover 89, the left end in FIG. 12 is fixed to the Y-axis moving table 77, and the X-axis integrated cover 89 is a fixed cover fixed to the Y-axis moving table 77. Note that the lower surface of the X-axis integrated cover 89 is open. The width of the X-axis integrated cover 89 in the Y-axis direction is substantially the same as the width of the X-axis moving table 76 in the Y-axis direction.

  As shown in FIG. 17, the upper surface portion 89 c has a first upper surface portion 89 c 1 formed at substantially the same height as the upper surface portion 91 c of the fixed cover 91, and approximately the same height as the upper surface of the X-axis telescopic cover 88. And a second upper surface portion 89c2 that is formed and protrudes upward from the first upper surface portion 89c1. More specifically, the second upper surface portion 89c2 is formed at the center position in the Y axis direction so as to be sandwiched between the two first upper surface portions 89c1 in the Y axis direction. In addition, two vertical step surfaces 89c3 are formed between the two first upper surface portions 89c1 and the one second upper surface portion 89c2. A portion surrounded by the two step surfaces 89c3 and the second upper surface portion 89c2 is accommodated in the second cover accommodating portion 76g of the X-axis moving table 76 as shown in FIG. Further, the bottom surface of the X-axis moving table 76 passes above the first upper surface portion 89c1 and the second upper surface portion 89c2.

  The width in the Y-axis direction of the second upper surface portion 89c2 is substantially the same as the width in the Y-axis direction of the X-axis telescopic cover 88, and the X-axis feed motor 22 is connected to the second upper surface portion as shown in FIG. It is housed below 89c2.

  The moving table 72 is provided with a seal member 92 made of an elastic member so that foreign matter dropped on the upper surface portion 91c does not enter the X-axis moving table 76 passing above the upper surface portion 91c of the fixed cover 91. ing. More specifically, as shown in FIGS. 12 and 18, the lower end (downward in the Z-axis direction) of the side plate 93 attached to one X-axis side surface 6d of the X-axis moving table 76 (left side in FIG. 12). Two long seal members 92 extending in the Y-axis direction are fixed to the upper side), and the lower ends of the two seal members 92 are in contact with the upper surface portions 91c disposed on both sides of the slit 91d. . That is, as the X-axis moving table 76 moves, the lower end sides of the two seal members 92 slide on the upper surface portion 91c.

  As shown in FIG. 18, the side plate 93 is a thin plate-like member formed in the Y-axis direction so as to be substantially the same width as the X-axis moving table 76 and straddle the X-axis telescopic cover 88. The seal member 92 is fixed to each of two locations on the lower surface side of the side plate 93 so as to contact the upper surface portion 91c. The seal member 92 is formed of a rubber elastic member, but may be a resin elastic member or a member such as a cloth or a string instead of an elastic member.

  Similarly, a seal made of an elastic member prevents the foreign matter dropped on the upper surface portion 89c from entering the moving table 72 into the X-axis movement table 76 that passes above the upper surface portion 89c of the X-axis integrated cover 89. A member 94 is provided. More specifically, as shown in FIGS. 12 and 17, a seal member 94 is fixed to a side plate 95 attached to the other X-axis direction side surface 6d of the X-axis moving table 76 (right side in FIG. 12). The lower end side of the seal member 94 is in contact with the upper surface portion 89c. That is, as the X-axis moving table 76 moves, the lower end side of the seal member 94 slides on the upper surface portion 89c.

  As shown in FIG. 17, the side plate 95 has a width substantially the same as the width of the X-axis moving table 76 in the Y-axis direction so as to straddle a portion surrounded by the two step surfaces 89c3 and the second upper surface portion 89c2. In addition, it is formed along the two first upper surface portions 89c1. A seal member 94 is fixed along the lower surface of the side plate 95 and in contact with all of the two first upper surface portions 89c1, the second upper surface portion 89c2, and the two step surfaces 89c3. The seal member 94 is formed of, for example, a rubber elastic member, like the seal member 92, but may be a resin elastic member or a member such as cloth or string instead of an elastic member.

  The state shown in FIG. 11 is the leftward movement limit of the X-axis movement table 76. At this time, the X-axis telescopic cover 88 is retracted and stored in the first cover storage portion 76f of the X-axis movement table 76. In this state, the X-axis feed mechanism is protected. On the other hand, the X-axis integrated cover 89 protects the X-axis feed mechanism while protruding from the X-axis moving table 76 in the X-axis direction (right side in FIG. 11).

  The state shown in FIG. 12 is the rightward movement limit of the X-axis movement table 76. At this time, the X-axis telescopic cover 88 is extended and protrudes from the X-axis movement table 76, and the X-axis feed mechanism is moved. Protect. Since the first mounting portion 88a of the X-axis telescopic cover 88 is fixed to the protective cover mounting surface 76h of the X-axis moving table 76, a part of the X-axis telescopic cover 88 is stored in the first cover storage portion 76f. It is in the state that was done. On the other hand, in the X-axis integrated cover 89, the X-axis feed mechanism is in a state where the portion surrounded by the two step surfaces 89c3 and the second upper surface portion 89c2 is stored in the second cover storage portion 76g of the X-axis moving table 76. Is protecting.

  When the X-axis moving table 76 moves from the state shown in FIG. 11 to the state shown in FIG. 12, the lower end side of the seal member 94 slides on the upper surface part 89c of the X-axis integrated cover 89 and moves to the upper surface part 89c. The fallen foreign matter is prevented from entering the X-axis moving table 76. On the other hand, when the X-axis moving table 76 moves from the state shown in FIG. 12 to the state shown in FIG. 11, the lower end side of the seal member 92 slides on the upper surface portion 91c of the fixed cover 91 and moves to the upper surface portion 91c. The fallen foreign matter is prevented from entering the X-axis moving table 76.

(Main effects of this form)
As described above, the moving table 2 of the present embodiment has the following effects in addition to the effects of the first embodiment.

  That is, in this embodiment, the X-axis moving table 76 includes a groove-shaped first cover storage portion 76f and a second cover storage portion 76g that are formed in the X-axis direction and open downward, and the first cover storage portion 76f. Accommodates an X-axis telescopic cover 88, and an X-axis integrated cover 89 is accommodated in the second cover accommodating portion 76g. Therefore, the width of the moving table 72 in the X-axis direction can be shortened. For example, as shown in FIG. 12, the width of the moving table 72 in the X-axis direction can be made substantially the same as the distance from the bearing 55 on the left side of the drawing to the right end of the X-axis feed motor 22 in the drawing. Note that the configuration of this embodiment is suitable for an X-axis movement table having a relatively narrow movement range such as a movement range in the X-axis direction of 300 mm to 700 mm.

  In this embodiment, the X-axis feed guide block 23 is slidably fitted to the lower side of the X-axis feed guide rail 20, and within the movable range of the X-axis moving table 76, four X-axis feed guide blocks 20 are used. The guide block 23 is located below the X-axis moving table 76. That is, the long X-axis feed guide rail 20 faces downward, and the upward X-axis feed guide block 23 fitted to the X-axis feed guide rail 20 is connected to the X-axis feed guide rail 20. In comparison, the length in the X-axis direction is as short as about 1/5. Therefore, the risk of foreign matter getting caught in the sliding portion between the X-axis feed guide rail 20 and the X-axis feed guide block 23 is greatly reduced. Further, the X-axis feed guide rail 20 is integrally disposed below the X-axis moving table 76 and is always located in a space closed by the side plates 93 and 95. Therefore, the X-axis telescopic cover 88 and the X-axis integrated cover 89 as the X-axis protective cover do not need to protect the sliding portion between the X-axis feed guide rail 20 and the X-axis feed guide block 23. The telescopic cover 88 and the X-axis integrated cover 89 are reduced in size so that the X-axis telescopic cover 88 and the X-axis integrated cover 89 can be easily stored in the first cover storage portion 76f and the second cover storage portion 76g, respectively. .

  In this embodiment, a seal member 92 is provided that prevents foreign matter that has fallen onto the upper surface 91 c of the fixed cover 91 fixed to the Y-axis moving table 77 from entering the X-axis moving table 76. In addition, a seal member 94 is provided to prevent foreign matter dropped on the upper surface 89 c of the X-axis integral cover 89 fixed to the Y-axis movement table 77 from entering the X-axis movement table 76. Therefore, the entry of foreign matter into the X-axis moving table 76 is prevented, and the X-axis feed mechanism such as the X-axis feed guide rail 20 and the X-axis feed guide block 23 can be more reliably protected.

  In this embodiment, an X-axis telescopic cover 88 that can expand and contract in the X-axis direction is provided as the X-axis protective cover. Therefore, the width of the X-axis moving table 76 in the X-axis direction can be further reduced as compared with the case where the integral cover is employed as the X-axis protective cover.

[Other embodiments]
Each form mentioned above is an example of a suitable form of the present invention, but it is not limited to this and can be variously modified within the range which does not change the gist of the present invention. For example, in the above-described embodiment, the Y-axis direction side surface 6b is formed so as to be orthogonal to the Y-axis. However, if the Y-axis direction side surface 6b is oriented in the Y-axis direction, the Y-axis direction The surface may be inclined with respect to the surface, or may be spherical, for example.

  Further, in each of the above-described embodiments, the flat surface 26c is formed in the horizontal direction in the concave portion 26d of the Y-axis telescopic cover 26, and the flat surface 27c is formed in the horizontal direction in the concave portion 27d of the Y-axis integrated cover 27. However, you may make it form the inclined surface which inclines in the Y-axis direction or an X-axis direction in the recessed parts 26d and 27d.

  Further, in the above-described embodiment, the wiper 62 includes the side surface portion 62a facing the step surfaces 26f and 27f. However, the side surface portion 62a is not necessarily provided, and the wiper 62 includes only the bottom surface portion 62b. It may be configured.

  Furthermore, in the embodiment described above, the side surface portion 62a of the wiper 62 is formed in a triangular shape, but the side surface portion 62a may have another polygonal shape or a circular shape.

  In each of the above-described embodiments, the wiper 62 is formed so that the wiper 62 passes through the groove portions 60 and 61 formed on both sides of the X-axis moving tables 6 and 76 in the Y-axis direction. You may make it pass. That is, the wiper 62 may be fixed only to the wiper mounting member 63 on one side.

  Furthermore, in each form mentioned above, the wiper 62 was fixed to the approximate center position of the X-axis movement tables 6 and 76 in the X-axis direction, but the fixing position of the wiper 62 is not limited to this, and the X-axis movement table 6 and 76 is not limited to this. You may make it attach to any position in the X-axis direction of the movement tables 6 and 76. FIG.

  Furthermore, the wiper 62 does not need to be fixed to the X-axis movement tables 6 and 76 via the wiper mounting member 63, and may be directly fixed to the X-axis movement tables 6 and 76, or other members. It may be fixed to the X-axis moving tables 6 and 76 via

  In the second embodiment described above, the X-axis moving table 76 is provided with the first cover storage portion 76f and the second cover storage portion 76g on both sides of the nut holding portion 24 in the X-axis direction. A cover storage portion may be formed only on one side of the holding portion 24 so that only one of the X-axis telescopic cover 88 or the X-axis integrated cover 89 is stored.

  Furthermore, in the second embodiment described above, the X-axis telescopic cover 88 is provided on one side of the X-axis moving table 76 and the X-axis integrated cover 89 is provided on the other side as the X-axis protective cover. A telescopic cover may be provided on both sides of the axis movement table 76, or an integral cover may be provided on both sides of the X axis movement table 76. Further, the sealing members 92 and 94 are not necessarily provided.

  The structure shown in the second embodiment, that is, the structure in which the X-axis protective cover can be housed in the first cover housing portion 76f and the second cover housing portion 76g is the groove portions 60 and 61 shown in the first embodiment. However, the present invention can be applied to an apparatus that does not have such groove portions 60 and 61 and the wiper 62.

  Further, in each of the above-described forms, in the Y-axis telescopic cover 26 or the Y-axis integrated cover 27, the pair of inclined surfaces 26a or the pair of inclined surfaces 27a directly intersect to form the top side 26e or the top side 27e. The configuration is not limited to this. For example, the inclined portion 97b of the Y-axis telescopic cover or the Y-axis integral cover may be configured to have a Y-axis direction cross section as shown in FIG. That is, a flat surface 97k is formed on the upper surface side of the Y-axis telescopic cover or the Y-axis integrated cover so as to intersect with the pair of inclined surfaces 97a, and the flat surface 97k and the two inclined surfaces 97a intersect to form two The apex 97e may be formed. The pair of vertical portions 97h connected to the pair of inclined surfaces 97a corresponds to the vertical portion 26h of the Y-axis telescopic cover 26 or the vertical portion 27h of the Y-axis integrated cover.

  Furthermore, in each of the above-described embodiments, an example of a vertical machining center has been described. However, the present invention can be applied to other machine tools as long as the machine tool includes a moving table.

It is side explanatory drawing seen from the side surface in the state which partially saw through the structure of the machine tool concerning Embodiment 1 of this invention. It is front explanatory drawing seen from the front in the state which partially saw through the structure of the machine tool shown in FIG. It is side surface explanatory drawing seen from the side surface in the state which partially saw through the structure of the principal part of the movement table shown in FIG. It is front explanatory drawing seen from the front in the state which partially saw through the structure of a part of X-axis feed mechanism which drives the X-axis movement table shown in FIG. 1 to a X-axis direction. It is a side view which shows the X-axis movement table shown in FIG. It is a front view which shows the X-axis movement table shown in FIG. It is a perspective view which shows the state which the Y-axis telescopic cover shown in FIG. 3 contracted from the X-axis movement table side. It is a perspective view which shows the Y-axis integral cover shown in FIG. 3 from the X-axis movement table side. It is a figure which shows the wiper shown in FIG. 3, (A) is a front view, (B) is a side view, (C) is a top view. It is side surface explanatory drawing seen from the side surface in the state which partially saw through the structure of the principal part of the movement table concerning Embodiment 2 of this invention. It is front explanatory drawing seen from the front in the state which partially saw through the structure of the principal part of the movement table when the X-axis movement table shown in FIG. 10 is located in one movable range end. It is front explanatory drawing seen from the front in the state which partially saw through the structure of the principal part of the movement table when the X-axis movement table shown in FIG. 10 is located in the other movable range end. It is side surface explanatory drawing seen from the side surface on the opposite side to FIG. 10 in the state which partially saw through the structure of the principal part of the movement table shown in FIG. It is a front view which shows the X-axis movement table and Y-axis movement table which are shown in FIG. It is a side view which shows the X-axis movement table shown in FIG. It is sectional drawing which shows the EE cross section in FIG. It is a side view which shows the relationship between a X-axis movement table and a X-axis integral cover from the FF direction of FIG. It is a side view which shows the relationship between an X-axis movement table, an X-axis telescopic cover, and a fixed cover from the GG direction of FIG. It is sectional drawing which shows the cross section of the Y-axis direction of the Y-axis telescopic cover concerning another form, or the Y-axis integral cover. It is a perspective view which shows the vertical machining center concerning a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine tool 2 Moving table 3 Head 4 Column 6 X-axis moving table 6a Upper surface 6b Y-axis direction side surface 6b3 Lowermost part 7, 77 Y-axis moving table 20 X-axis feeding guide rail 23 X-axis feeding guide block 26 Y-axis telescopic Cover (Y-axis protective cover)
26a Inclined surface 26b Inclined portion 26d Recessed portion 26c Flat surface 26e Top 26f Stepped surface 27 Y-axis integrated cover (Y-axis protective cover)
27a Inclined surface 27b Inclined portion 27c Flat surface 27d Recessed portion 27e Top side 27f Step surface 28, 29, 88 X-axis telescopic cover (X-axis protective cover)
60, 61 Groove portion 62 Wiper 62a Side surface portion 62b Bottom surface portion 63 Wiper mounting member 76 X-axis moving table 76f First cover storage portion (cover storage portion)
76g Second cover storage (cover storage)
89 X-axis integrated cover (X-axis protective cover, fixed cover)
91 Fixed cover (X-axis protective cover)
92, 94 Seal member 97a Inclined surface 97b Inclined portion 97e Top side

Claims (12)

It is configured to be movable in the X-axis direction and the Y-axis direction that are orthogonal to each other in the horizontal direction,
An X-axis movement table for placing a workpiece and moving in the X-axis direction, a Y-axis movement table for placing the X-axis movement table and moving in the Y-axis direction, and the Y-axis movement table An X-axis feed mechanism that is attached and drives the X-axis movement table in the X-axis direction, a Y-axis feed mechanism that drives the Y-axis movement table in the Y-axis direction, and an X that protects the X-axis feed mechanism In a moving table provided with an axis protection cover and a Y-axis protection cover for protecting the Y-axis feed mechanism,
The X-axis moving table includes an upper surface on which the workpiece is placed, and a Y-axis direction side surface formed with the surface facing the Y-axis direction below the upper surface,
The Y-axis protective cover is connected to the inclined portion in the Y-axis direction, and has an inclined portion having an inclined surface whose top side is higher than the lowermost portion of the side surface in the Y-axis direction, and the Y-axis direction A recess formed to be recessed to a position lower than the lowest part of the side surface,
A groove portion formed by disposing the recess between the Y-axis direction side surface and the inclined portion in the Y-axis direction; and a wiper that passes through the groove portion in conjunction with the X-axis moving table. A moving table characterized by   The moving table according to claim 1, wherein the concave portion includes a flat surface formed in a horizontal direction at a position lower than a lowermost portion of the side surface in the Y-axis direction. The Y-axis protective cover includes a step surface formed in a vertical direction between the inclined portion and the concave portion,
The moving table according to claim 2, wherein the wiper includes a side surface portion facing the step surface and a bottom surface portion facing the flat surface.   The moving table according to claim 3, wherein a cross section of the side surface in a direction opposite to the step surface is formed in a substantially triangular shape with a bottom side as a bottom side. The groove is formed on each side of the X-axis moving table on both sides of the Y-axis,
The moving table according to claim 1, further comprising two wipers that pass through the two groove portions.   6. The moving table according to claim 1, wherein the wiper is disposed at a substantially central position in the X-axis direction of the X-axis moving table.   The said wiper is being fixed to the said X-axis movement table via the wiper attachment member formed so that it might always fit in the said groove part within the movable range of the said X-axis movement table. To 6. The moving table according to any one of 6 to 6.   The X-axis moving table includes a groove-shaped cover storage portion that is formed in the X-axis direction and opens downward, and is configured such that the X-axis protective cover can be stored in the cover storage portion. The movement table according to claim 1. The X-axis feed mechanism is slidably fitted to a long X-axis feed guide rail that guides the X-axis moving table in the X-axis direction and a lower side of the X-axis feed guide rail. An X-axis feed guide block,
The X-axis feed guide block has a shorter length in the X-axis direction than the X-axis feed guide rail,
Fixing the X-axis feed guide rail below the X-axis moving table, and fixing the X-axis feed guide block to the Y-axis moving table;
9. The moving table according to claim 8, wherein the X-axis feed guide block is positioned below the X-axis moving table within a movable range of the X-axis moving table. The X-axis protective cover includes a fixed cover fixed to the Y-axis moving table,
The moving table according to claim 8 or 9, further comprising a seal member that prevents foreign matter falling on the fixed cover from entering the inside of the X-axis moving table.   11. The moving table according to claim 8, wherein the X-axis protective cover includes a telescopic cover that can expand and contract in the X-axis direction.   A moving table according to any one of claims 1 to 11, a head for processing a workpiece, a column mounted with a drive mechanism that rises perpendicularly to the moving table and drives the head in a vertical direction. A machine tool comprising:

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