JP2023121347A - Machine tool - Google Patents

Abstract

To provide a machine tool including an inexpensive protection member which can cover an exposed portion of a moving mechanism in a column to protect the portion.SOLUTION: A plate-like protection cover 30 is fixed to a lower part of a spindle head 6 to protect a moving mechanism in an opening 51 of a column 5 from chips etc. If the spindle head 6 is located at an uppermost end of a movable range, an auxiliary cover 40 covers an exposed portion of the opening 51, which is not covered with the protection cover 30, to protect the portion. If the spindle head 6 moves to a lowermost end of the movable range, the auxiliary cover 40 contacts with a cover device 15 to be restricted from moving downward. As the spindle head 6 moves downward, the auxiliary cover 40 moves upward relative to the protection cover 30 and is stored in the back side of the protection cover 30.SELECTED DRAWING: Figure 7

Description

The present invention relates to machine tools.

The machine tool described in Patent Document 1 has a Z-axis cover fixed to the lower part of the spindle head. The column is provided on the bed and accommodates inside a head moving mechanism for moving the spindle head. The Z-axis cover moves along the front surface of the column in the Z-axis direction as the spindle head moves. The Z-axis cover isolates the inside and outside of the column to protect the head moving mechanism from chips.

Japanese Unexamined Patent Publication No. 2006-123045

When the movement range of the spindle head is widened, it becomes necessary to extend the Z-axis cover that protects the inside of the column in the Z-axis direction. In this case, when the spindle head is moved to the lowest position in the Z-axis direction, the Z-axis cover may interfere with other structures on the bed. If a bellows-shaped or telescopic type cover is used as the Z-axis cover, the number of parts increases, resulting in a problem of high cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a machine tool equipped with an inexpensive protective member capable of covering and protecting the exposed portion of the moving mechanism in the column.

A machine tool according to an aspect of the present invention includes a base, a column provided on the base, a spindle to which a tool is detachably attached to a tip, and a spindle provided on one side surface of the column. a support for supporting; a movement mechanism provided inside the column for moving the support in the axial direction of the main shaft; and a first protective member that covers and protects a portion of the column where the movement mechanism is exposed as the support body moves on the one side surface of the column, wherein the first protective member is provided with the second a second protection member that is movable relative to one protection member and covers and protects a portion of the one side surface of the column where the moving mechanism is exposed as the support and the first protection member move; It is characterized by having

The first protection member covers and protects the portion where the movement mechanism is exposed on one side surface of the column as the support moves in the axial direction. When the support is positioned near one end of its range of motion, the first protection member is close to the base. When the support is positioned near the other end of the movement range, the first protection member may not cover one side surface, and the movement mechanism may be exposed. The second protection member moves relative to the first protection member, and covers a portion of the one side surface of the column that the first protection member cannot cover in the vicinity of the other end of the range of movement of the support. Therefore, the first protective member and the second protective member can protect the moving mechanism by preventing chips generated by machining the work material with the tool from entering the column from one side. In addition, since the first protective member is fixed to the support and the second protective member moves with respect to the first protective member, it can be manufactured at low cost.

The second protective member of this aspect may move in the axial direction relative to the first protective member as the support body moves. The second protection member axially moves relative to the first protection member. Therefore, when the support moves near the other end of the range of movement, the second protective member covers the part of the column that the first protective member cannot cover on one side surface of the column. Therefore, the first protective member and the second protective member can protect the movement mechanism by preventing chips generated by machining the work material with the tool from entering the column from one side.

The second protection member of this aspect has a first guide portion that extends in the axial direction and guides relative movement in the axial direction with respect to the first protection member, and the first protection member is , and an engaging portion that engages with the first guide portion and moves relatively along the first guide portion. The second protective member can be reliably moved in the axial direction with respect to the first protective member by the guidance of the first guide portion.

The second protection member of this aspect may be provided closer to the moving mechanism than the first protection member. The first protective member is closer to the support than the second protective member. Therefore, the first protection member prevents chips generated by machining the work material with the tool from entering the first guide portion of the second protection member.

The first protective member of this aspect may have a second guide portion that guides movement of the second protective member in the axial direction. The second protection member can be moved axially with respect to the first protection member more reliably by the guidance of the second guide portion.

The second protective member of this aspect may be made of resin. When the support body moves to one end of the movement range, the second protection member, instead of the first protection member, contacts the structure on the base, so that the machine tool suppresses the noise and impact that occurs when it contacts. can.

The second protection member of this aspect has a cutout portion formed by cutting an end portion of the base side in the axial direction toward a side away from the base in an intermediate portion in the width direction that intersects the axial direction. good too. The notch prevents the second protective member from coming into contact with the structure on the base when the support moves to the vicinity of one end of the movement range.

The second protective member of this aspect may be provided with an elastic resin member at one end in the axial direction. When the support body moves to the vicinity of one end of the movement range, the resin member of the second protection member abuts against the structure on the base, thereby suppressing noise and impact generated at the time of abutment.

1 is a perspective view of a machine tool 1; FIG. 4 is a front view of the spindle head 6 and the column 5 with the protective cover 30 removed; FIG. 4 is a front view of the protective cover 30 when the auxiliary cover 40 has moved downward relative to the protective cover 30; FIG. 4 is a rear view of the protective cover 30 when the auxiliary cover 40 has moved downward relative to the protective cover 30. FIG. 4 is a right side view of the protective cover 30 when the auxiliary cover 40 has moved downward relative to the protective cover 30; FIG. 4 is a front view of the protective cover 30 when the auxiliary cover 40 has moved upward relative to the protective cover 30; FIG. FIG. 4 is a front view of the column 5 when the spindle head 6 is at the uppermost end in the Z-axis direction; 4 is a front view of the column 5 when the spindle head 6 is at the lowest end in the Z-axis direction; FIG. 4 is a front view of the protective cover 30 assembled with the auxiliary cover 140. FIG. 4 is a front view of the protective cover 30 assembled with the auxiliary cover 40 having the rubber feet 45. FIG.

A machine tool 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, left and right, front and back, and top and bottom indicated by arrows in the drawings are used. The left-right direction, the front-rear direction, and the up-down direction of the machine tool 1 are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.

The structure of the machine tool 1 will be described with reference to FIGS. 1 and 2. FIG. The machine tool 1 includes a base 2, a machine body 3, a table 10, a tool changer 17, and the like. The base 2 is a substantially rectangular parallelepiped iron base. The machine body 3 is provided on the upper rear side of the base 2 and cuts a work material (not shown) held on the upper surface of the table 10 . The base 2 has a feed mechanism in the upper center. The feed mechanism moves the table 10 in the X-axis direction and the Y-axis direction. The feeding mechanism will be described later. The tool changer 17 is fixed to a frame 18 provided above the column 5 of the machine body 3 . A tool changer 17 changes a tool (not shown) attached to the spindle 4 of the machine body 3 with another tool.

The machine body 3 includes a column 5, a spindle head 6, a moving mechanism, a protective cover 30, a spindle 4, a control box 19, and the like. The column 5 is a columnar member made of iron, and is provided on the upper rear side of the base 2 . The spindle head 6 moves up and down along the front surface of the column 5 in the Z-axis direction. A moving mechanism for moving the spindle head 6 in the Z-axis direction is provided inside the column 5 . The moving mechanism includes a pair of Z-axis rails 21, Z-axis ball screw 22, and Z-axis motor 23, and Z-axis rail 21 and Z-axis ball screw 22 extend in the Z direction. The spindle head 6 moves along the Z-axis rail 21 . The spindle head 6 has a nut (not shown) on its rear surface. Column 5 has an opening 51 in the front. The nut is screwed onto the Z-axis ball screw 22 in the column 5 through the opening 51 . The Z-axis motor 23 is provided above the Z-axis ball screw 22 . The Z-axis motor 23 rotates the Z-axis ball screw 22 to move the spindle head 6 together with the nut in the Z-axis direction. A protective cover 30 is fixed to the spindle head 6 and placed in front of the column 5 . The column 5 has a pair of guide plates 24 at both left and right ends of the front surface thereof, which support the left and right ends of the protective cover 30 and guide the vertical movement of the protective cover 30 . Protective cover 30 will be described later.

A spindle head 6 rotatably supports the spindle 4 . A tool is mounted on the spindle 4 and driven by a spindle motor 11 to rotate. A spindle motor 11 is provided above the spindle head 6 . A control box 19 is attached to the rear side of the column 5 . The control box 19 houses various devices inside. Various devices are, for example, an NC control board, a DC switching power supply, a breaker, an inverter for the tool changer 17, a wiring duct, a servo amplifier, and the like.

The feed mechanism includes a Y-axis feed mechanism 8 , a carrier 7 and an X-axis feed mechanism 9 . A Y-axis feed mechanism 8 is provided on the upper surface of the base 2 . A Y-axis feed mechanism 8 moves the carrier 7 in the Y-axis direction. The Y-axis feed mechanism 8 has a pair of Y-axis rails (not shown), a Y-axis ball screw (not shown), and a Y-axis motor (not shown), and the Y-axis rail and Y-axis ball screw extend in the Y-axis direction. A Y-axis ball screw is arranged between a pair of Y-axis rails. The carrier 7 moves along the Y-axis rails. The carrier 7 has a rectangular parallelepiped shape and has a nut (not shown) on its bottom surface. The nut screws onto the Y-axis ball screw. The Y-axis motor rotates the Y-axis ball screw to move the carrier 7 together with the nut in the Y-axis direction.

The X-axis feed mechanism 9 is provided on the upper surface of the carrier 7 . The X-axis feed mechanism 9 moves the table 10 in the X-axis direction. The X-axis feed mechanism 9 includes a pair of X-axis rails (not shown), an X-axis ball screw (not shown), an X-axis motor (not shown), etc. The X-axis rails and the X-axis ball screw extend in the X-axis direction. . The X-axis ball screw is arranged between a pair of X-axis rails. The table 10 moves along the X-axis rail. The table 10 has a nut (not shown) on its lower surface, and the nut is screwed onto the X-axis ball screw. The X-axis motor rotates the X-axis ball screw to move the table 10 together with the nut in the X-axis direction. The table 10 moves in the Y-axis direction via the carrier 7 . That is, the table 10 is moved in the X-axis direction and the Y-axis direction by the X-axis feed mechanism 9, the Y-axis feed mechanism 8, and the carrier 7. FIG. The machine tool 1 cuts the workpiece by relative movement between the workpiece and the tool placed on the table 10 .

The table 10 has a cover device 12 on the right side and a cover device 13 on the left side. The X-axis feed mechanism 9 is exposed to the outside on the right and left sides of the table 10 . Cover devices 12 and 13 cover portions of the X-axis feed mechanism 9 exposed to the outside. Each of the cover devices 12 and 13 has a structure in which three covers each having a mountain-shaped cross section are stacked in a nested manner. Each of the cover devices 12 and 13 expands and contracts in the horizontal direction (X-axis direction) following the movement of the table 10 .

The carrier 7 is provided with a cover device 14 on the front side and a cover device 15 on the rear side. The Y-axis feed mechanism 8 is exposed to the outside on the front and rear sides of the table 10 . The cover devices 14 and 15 cover the portions of the Y-axis feed mechanism 8 exposed to the outside. The cover device 14 has a structure in which three covers having mountain-shaped cross sections are nested one on top of the other. The cover device 14 expands and contracts in the front-rear direction (Y-axis direction) following the movement of the carrier 7 (table 10) in the Y-axis direction. The cover device 15 is a sheet metal having a mountain-shaped cross section. The cover device 15 moves in the Y-axis direction together with the carrier 7 (table 10). When the carrier 7 moves toward the column 5, the column 5 accommodates the cover device 15 inside its lower part.

The protective cover 30 will be described with reference to FIGS. 2 to 6. FIG. The front surface of the column 5 is open for raising and lowering the spindle head 6 . The protective cover 30 is a protective cover that prevents chips scattered from the table 10 or tools from entering the inside of the column 5 . The protective cover 30 is a metal plate whose edges are bent and has a substantially rectangular shape when viewed from the front. An upper end portion 31 of the protective cover 30 is bent forward and has a screw hole for screwing to the lower portion of the spindle head 6 . Left and right side end portions 32 of the protective cover 30 are bent rearward. The side end portion 32 guides the vertical movement of the auxiliary cover 40, which will be described later. A lower end portion 33 of the protective cover 30 has a notch portion 34 formed by notching an approximately central portion in the left-right direction upward in the shape of a mountain. The notch 34 avoids interference with the cover device 15 having a mountain-shaped cross section when the spindle head 6 descends.

The protective cover 30 has a pair of fixing holes (not shown) for fixing the pair of guide screws 35 at positions closer to the lower end 33 than the center in the vertical direction. The fixing holes are formed at positions separated from each other in the horizontal direction. The guide screws 35 fastened to the fixing holes are engaged with the pair of guide grooves 41 of the auxiliary cover 40 respectively.

The auxiliary cover 40 is a plate made of resin (for example, vinyl chloride resin (PVC)) and has a substantially rectangular shape elongated in the left-right direction when viewed from the front. The length of the auxiliary cover 40 in the horizontal direction is slightly shorter than that of the protective cover 30, and the length in the vertical direction is 1/2 to 1/3 the size of the protective cover 30. As shown in FIG. The auxiliary cover 40 has a pair of guide grooves 41 extending vertically. The guide groove 41 extends through the auxiliary cover 40 in the front-rear direction, and the formation position in the left-right direction corresponds to the formation position of the fixing hole in the protective cover 30 . A lower end portion 43 of the auxiliary cover 40 has a notch portion 44 formed by notching an approximately center portion in the left-right direction upward. The notch 44 avoids interference with the chevron-shaped cover device 15 when the spindle head 6 descends.

The auxiliary cover 40 is arranged on the rear side of the protective cover 30 , and guide screws 35 fixed to the fixing holes are inserted through the guide grooves 41 . The guide screw 35 inserted through the guide groove 41 is fitted with a washer at its tip and fastened with a nut. The guide screw 35 does not fix the auxiliary cover 40 to the protective cover 30, but allows a gap between the protective cover 30 and the auxiliary cover 40, thereby allowing the auxiliary cover 40 to move up and down relative to the protective cover 30. keep it possible. Therefore, when the protective cover 30 is fixed to the lower portion of the spindle head 6 , the auxiliary cover 40 moves downward by its own weight relative to the protective cover 30 until the upper end of the guide groove 41 contacts the guide screw 35 . do. At this time, a substantially lower half portion of the auxiliary cover 40 in the vertical direction is exposed from the lower end portion 43 of the protective cover 30 . When the auxiliary cover 40 moves upward relative to the protective cover 30 and the lower end of the guide groove 41 contacts the guide screw 35 , the lower end 43 of the auxiliary cover 40 moves toward the lower end of the protective cover 30 It is located at almost the same height as 33 and is almost not exposed (see FIG. 6). The side ends 32 of the protective cover 30 position the left and right side ends 42 of the auxiliary cover 40 and guide the vertical movement of the auxiliary cover 40 .

Operations of the protective cover 30 and the auxiliary cover 40 will be described with reference to FIGS. The protective cover 30 assembled with the auxiliary cover 40 has its upper end 31 fixed to the lower portion of the spindle head 6 with screws. Guide plates 24 provided on the left and right ends of the front surface of the column 5 guide the left and right ends of the protective cover 30 . As shown in FIG. 7, when the spindle head 6 moves upward in the Z-axis direction and is at the uppermost position of the movable range, the protective cover 30 covers the front surface of the column 5 and the moving mechanism inside the column 5 Protects from chips, etc. during work. When the movement range of the spindle head 6 is made larger than before, the lower end 33 of the protective cover 30 is located above the lower end of the opening 51 on the front surface of the column 5 when the spindle head 6 is at the uppermost end. That is, the protective cover 30 cannot cover the portion below the lower end portion 33 of the lower portion of the opening 51, and the inside of the opening 51 is exposed.

The auxiliary cover 40 attached to the protective cover 30 moves downward with respect to the protective cover 30 by its own weight. During movement, the pair of guide grooves 41 of the auxiliary cover 40 are aligned with the pair of guide screws 35 of the protective cover 30, so that the auxiliary cover 40 moves straight downward in the vertical direction. Furthermore, since the left and right side edges 32 of the protective cover 30 guide the left and right side edges 42 of the auxiliary cover 40, the auxiliary cover 40 moves straighter downward in the vertical direction. When the spindle head 6 moves to the uppermost end with the auxiliary cover 40 exposed downward from the lower end 33 of the protective cover 30 , the auxiliary cover 40 is positioned between the lower end of the opening 51 of the column 5 and the lower end of the protective cover 30 . 33 is covered to protect the movement mechanism in the column 5 from chips during machining. Since the auxiliary cover 40 is positioned behind the protective cover 30, the guide groove 41 is positioned behind the protective cover 30 and is not exposed to the front side. Therefore, the protective cover 30 prevents chips and the like during machining from entering the guide groove 41 .

When the spindle head 6 moves downward in the Z-axis direction, the auxiliary cover 40 moves downward together with the protective cover 30 while maintaining the lowest position where it can move under its own weight. While the spindle head 6 is descending, the lower end 43 of the auxiliary cover 40 contacts the cover of the cover device 15 . Since the auxiliary cover 40 is made of resin, collision sounds and impacts are suppressed as compared with the case where the auxiliary cover 40 is made of metal. After coming into contact with the cover device 15, even if the spindle head 6 is further lowered, the auxiliary cover 40 remains in contact with the cover device 15 and does not move vertically. The protective cover 30 moves downward relative to the auxiliary cover 40 . The auxiliary cover 40 is located on the back side of the protective cover 30 and moves upward relative to the protective cover 30 without hindering the downward movement of the protective cover 30 .

As shown in FIG. 8, when the spindle head 6 is at the lowest position of the movable range, the lower end 33 of the protective cover 30 has a slight gap with the cover device 15 by control, and the cover It does not abut against the device 15 . The lower end portion 43 of the auxiliary cover 40 is located below the lower end portion 33 of the protective cover 30 and is in contact with the cover device 15 . In this way, the auxiliary cover 40 moves upward relative to the protective cover 30 and is housed on the rear side of the protective cover 30, so that the auxiliary cover 40 does not hinder the downward movement of the protective cover 30. .

As described above, the protective cover 30 covers and protects the portion of the front surface of the column 5 where the moving mechanism is exposed as the spindle head 6 moves in the Z-axis direction. The protective cover 30 approaches the base 2 when the spindle head 6 is positioned near the lower end of the movement range. When the spindle head 6 is positioned near the upper end of the movement range, the protective cover 30 may not be able to cover the opening 51 on the front surface of the column 5, exposing the movement mechanism. Specifically, when the spindle head 6 is positioned at the uppermost end of the movement range, the lower end 33 of the protective cover 30 is above the lower end of the opening 51 of the column 5 . In this case, the protective cover 30 cannot cover the lower portion of the opening 51 below the lower end 33, and if the auxiliary cover 40 were not provided, the movement mechanism inside the opening 51 would be exposed. The auxiliary cover 40 moves relative to the protective cover 30 and covers the portion of the opening 51 on the front surface of the column 5 that the protective cover 30 cannot cover in the vicinity of the upper end of the movement range of the spindle head 6 . Therefore, the protective cover 30 and the auxiliary cover 40 can prevent chips generated by machining the work material with the tool from entering the column 5 through the opening 51, thereby protecting the moving mechanism. In addition, since the protective cover 30 is fixed to the spindle head 6 and the auxiliary cover 40 is movable with respect to the protective cover 30, it can be manufactured at a low cost.

The auxiliary cover 40 moves relative to the protective cover 30 in the Z-axis direction. Therefore, when the spindle head 6 moves near the upper end of the movement range, the auxiliary cover 40 covers the portion of the opening 51 on the front surface of the column 5 that the protective cover 30 cannot cover. Therefore, the protective cover 30 and the auxiliary cover 40 can prevent chips generated by machining the work material with the tool from entering the column 5 through the opening 51, thereby protecting the moving mechanism.

The auxiliary cover 40 can be reliably moved in the Z-axis direction with respect to the protective cover 30 by being guided by the guide grooves 41 .

The protective cover 30 is closer to the spindle head 6 than the auxiliary cover 40 is. Therefore, the protective cover 30 prevents chips generated by machining the work material with the tool from entering the guide groove 41 of the auxiliary cover 40 .

The auxiliary cover 40 can be moved more reliably in the Z-axis direction with respect to the protective cover 30 by being guided by the side end portion 32 of the protective cover 30 .

When the spindle head 6 moves to the vicinity of the lower end of the movement range, the resin-made auxiliary cover 40 instead of the protective cover 30 abuts against the cover device 15 on the base 2, so that the machine tool 1 is moved at the time of abutment. It can suppress sound and impact.

The notch 44 prevents the auxiliary cover 40 from colliding with the cover device 15 on the base 2 when the spindle head 6 moves to the vicinity of the lower end of the movement range.

In the above embodiment, the front surface of the column 5 corresponds to "one side" of the present invention. The spindle head 6 corresponds to the "support" of the present invention. The Z-axis ball screw 22 and Z-axis rail 21 correspond to the "moving mechanism" of the present invention. The protective cover 30 corresponds to the "first protective member" of the present invention. The auxiliary cover 40 corresponds to the "second protective member" of the present invention. The guide groove 41 corresponds to the "first guide portion" of the present invention. The guide screw 35 corresponds to the "engaging portion" of the present invention. The side end portion 32 corresponds to the "second guide portion" of the present invention. The notch 44 corresponds to the "notch" of the present invention.

The present invention is not limited to the above embodiments, and various modifications can be made. Although a pair of guide grooves 41 are provided in the auxiliary cover 40, there may be one or three or more. When there is only one guide groove 41 , the auxiliary cover 40 can be reliably moved in the vertical direction relative to the protective cover 30 by the side end portion 32 of the protective cover 30 . If there are two or more guide grooves 41 , the side ends 32 of the protective cover 30 may be omitted, and the auxiliary cover 40 can reliably move in the vertical direction relative to the protective cover 30 . The notch 34 of the protective cover 30 may be omitted. The cutout portion 44 of the auxiliary cover 40 may be omitted, but in this case, the shape of the auxiliary cover 40 should match the shape of the opening 51 of the column 5 and surely cover the portion that cannot be protected by the protective cover 30. good.

The auxiliary cover 40 does not have to move vertically relative to the protective cover 30 . For example, as shown in FIG. 9, the auxiliary cover 140 may be provided rotatably about a rotating shaft 141 provided near the center of the protective cover 130 in the left-right direction. A pair of auxiliary covers 140 are provided, and rotate by their own weight between a position where they are stored on the back side of the protective cover 130 and a position where they are exposed from the protective cover 130 . When the spindle head 6 descends, the pair of auxiliary covers 140 come into contact with the cover device 15 and are housed behind the protective cover 130 by rotating in a direction in which both left and right ends move upward. When the spindle head 6 rises, the pair of auxiliary covers 140 are exposed from the protective cover 130 by rotating in a direction in which the left and right end portions move downward under their own weight. The pair of auxiliary covers 140 can be positioned so as to protect the inside of the opening 51 of the column 5 by contacting each other at the center in the left-right direction.

As shown in FIG. 10 , the auxiliary cover 40 may be provided with an elastic cushioning material such as a rubber foot 45 at the lower end 43 . In this case, the auxiliary cover 40 may be made of metal. When the spindle head 6 moves to the vicinity of the lower end of the movement range, the rubber feet 45 of the auxiliary cover 40 come into contact with the cover device 15 on the base 2, thereby suppressing noise and impact generated at the time of contact.

1 machine tool 2 base 4 spindle 5 column 6 spindle head 21 Z-axis rail 22 Z-axis ball screw 30, 130 protective cover 32 side end 35 guide screw 40, 140 auxiliary cover 41 guide groove 44 notch 45 rubber foot

Claims (8)

a base;
a column provided on the base;
a main shaft on which a tool is detachably attached to the tip;
a support provided on one side surface of the column for supporting the main shaft;
a movement mechanism provided inside the column for moving the support in the axial direction of the main shaft;
The second column is fixed to the support, moves in the axial direction together with the support by the moving mechanism, and covers and protects a portion of the one side surface of the column where the moving mechanism is exposed as the support moves. (a) a machine tool comprising a protective member,
A portion provided on the first protective member, movable relative to the first protective member, and exposing the moving mechanism along with the movement of the support and the first protective member on the one side surface of the column A machine tool comprising a second protective member that covers and protects the 2. A machine tool according to claim 1, wherein said second protective member moves in said axial direction relative to said first protective member as said support moves. The second protection member has a first guide portion that extends in the axial direction and guides relative movement in the axial direction with respect to the first protection member,
3. The machine tool according to claim 2, wherein said first protective member has an engaging portion that engages with said first guide portion and moves relatively along said first guide portion. 4. The machine tool according to claim 3, wherein the second protective member is provided closer to the moving mechanism than the first protective member. 5. The machine tool according to claim 4, wherein the first protective member has a second guide portion that guides movement of the second protective member in the axial direction. 6. The machine tool according to claim 1, wherein said second protective member is made of resin. The second protective member is characterized by having a cutout portion formed by cutting an end portion of the base side in the axial direction on a side away from the base in an intermediate portion in a width direction that intersects with the axial direction. A machine tool according to any one of claims 1 to 6. 8. The machine tool according to any one of claims 1 to 7, wherein the second protective member is provided with an elastic resin member at one end in the axial direction.

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