JPWO2016125299A1 - Removable cover fixing structure and machine tool - Google Patents

Abstract

The detachable detachable cover (31) is fixed to a cover support portion (23) to which the detachable cover is attached. The detachable cover (31) has upper and lower edges (32, 33) in the attached state. It is fixed to the cover support portion (22, 23), and at least one of the upper and lower edge portions and the cover support portion (23) corresponding to the edge portion (33) are arranged in the vertical direction along the surface. There are a plurality of fixing recesses (41, 42) recessed in the plate thickness direction, and edges along the surface in the edge portion (33) and the cover support portion (23) of the removable cover arranged along the surface. A plurality of projecting portions (43, 44) projecting from the rim are formed, and the edge portions of the removable cover and the fixing recess portions (41, 42) of the cover support portion and the projecting portions (43, 44) mesh with each other.

Description

  The present invention relates to a fixing structure for a detachable cover in which a dimension in the plate thickness direction is suppressed, and a machine tool including the detachable cover having the fixing structure.

  Machine tools and other machine tools are equipped with a machine body cover that covers the internal machining area, and can be removed from the machine body cover so that the operator can work inside the cover from the outside, such as maintenance work. A cover is provided. For such a fixing structure of the detachable cover, for example, a bolt / nut type that is fixed to the cover main body by a bolt and a nut is often employed. Also, in order to eliminate inconvenience in handling such as nut removal, a bolt / tapped hole type in which a tapped hole is formed in a backing plate fixed to the cover main body and bolted is used.

JP 62-115799 A

  However, fixing structures such as a bolt / nut type and a bolt / tap hole type have a drawback in that the dimension is taken in the thickness direction of the cover from the inner surface or the outer surface of the cover. That is, in the bolt / nut type fixing structure, the bolt head and the nut exist as protrusions from the cover surface. Further, in the bolt / tap hole type fixing structure, the bolt head becomes a protrusion, and the tapping plate has a space in the plate thickness direction from the cover surface in a wide range by the plate thickness. In general, these dimensions are insignificant, but are alarming for structures that require space in millimeters. Such a problem also exists for a compact machine tool proposed by the present applicant.

  Accordingly, an object of the present invention is to provide a fixing structure for a detachable cover in which the dimension in the plate thickness direction is suppressed, and a machine tool including the detachable cover having the fixing structure, in order to solve such a problem.

  The fixing structure of the detachable cover in one aspect of the present invention is a detachable cover in which a part of a cover made of a thin plate is detachable, the detachable cover, and a cover support portion of the cover to which the detachable cover is attached, The upper and lower edges of the removable cover are fixed to the cover support, and at least one of the upper and lower edges and the cover support corresponding to the edge are surfaces. A plurality of fixing recesses recessed in the plate thickness direction and a plurality of protrusions protruding from the edge along the surface are formed on the edge portion of the removable cover and the cover support portion. In addition, the edge of the detachable cover and the fixing recessed portion and the protruding portion of the cover support portion are engaged with each other.

  A machine tool according to another aspect of the present invention includes a machining module that is movable in a front-rear direction on a base that is a base, and the machining module is covered by a machine body cover formed of a thin plate, and is removed from the machine body cover. An attachable / detachable cover is provided, and the attachable / detachable cover has an upper and lower edge portion in an attached state fixed to a cover support portion on the body cover main body side, and at least one of the upper and lower edge portions of the attachable / detachable cover. And the cover support portion corresponding to the edge portion is arranged in a vertical direction along the surface, and a plurality of fixing recesses recessed in the plate thickness direction are provided on the edge portion of the removable cover and the cover support portion. A plurality of protrusions protruding from the edge along the surface are formed, and the edge of the detachable cover and the fixing recess and the protrusion of the cover support part mesh with each other.

  According to the present invention, the detachable cover is disposed along the surface with respect to the cover support portion, and the fixing concave portion in the plate thickness direction formed on the edge portion of the detachable cover and the cover support portion, and along the surface The removable cover is fixed to the cover support portion by meshing with the protruding portion protruding from the edge in the direction. For this reason, since it is sufficient to have a dimension sufficient to form the fixing concave portion and the protruding portion in the plate thickness direction, the plate thickness of the fixing structure portion of the removable cover can be kept small.

It is the perspective view which showed one Embodiment of the processing machine line containing a machine tool. 1 is an external perspective view showing an embodiment of a machine tool. It is the front view which showed the relationship between the X-axis moving body and cover of an adjacent machine tool. It is the perspective view which showed the fixation structure of the attachment / detachment cover from the machine tool internal side. It is the perspective view which showed the fixed state of the enlarged part shown in FIG. It is the expanded sectional view which showed the fixed structure part of the center lower part of FIG. It is the perspective view which showed 2nd Embodiment of the fixing structure of the attachment / detachment cover. It is a partial front view of the fixed structure which showed the process to a fixed state.

  Next, an embodiment of a fixing structure for a detachable cover and a machine tool according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a processing machine line including a machine tool of the present embodiment. In the processing machine line 1, a workpiece input module 6 is installed on the left side of the drawing, which is the workpiece carry-in side, and seven machine tools 5 and a workpiece stock module 7 are arranged on the right side of the drawing, which is the workpiece discharge side. Is installed. The machine tool 5, the workpiece input module 6 and the workpiece stock module 7 are all uniform in appearance, and have the same outer shape and dimensions. The processing machine line 1 is provided with a workpiece transfer device that delivers workpieces between the machine tools 5, the workpiece input module 6, and the workpiece stock module 7 arranged in the width direction. Is done.

  The machine tool 5 is entirely covered with an exterior cover 3, and a front cover 4 is provided at a front portion on the front side of the drawing, and the exterior cover 3 and the front cover 4 are integrated. Various processing modules that perform processing such as cutting and drilling on the workpiece are mounted inside the exterior cover 3, and a processing chamber that is closed for each machine tool 5 is configured. On the other hand, the front cover 4 constitutes one conveyance space in the width direction of the processing machine line 1, and a conveyance device for conveying a workpiece to the machining chamber of each machine tool 5 is installed therein. .

  Next, FIG. 2 is an external perspective view showing the machine tool of the present embodiment. This machine tool 10 is two of the seven machine tools 5 constituting the processing machine line 1 shown in FIG. The machine tool 10 is a vertical machining center, and its processing module 11 is covered with a machine body cover 12. The processing module 11 is movable in the front-rear direction on the base, and is assembled on a movable bed 13 having wheels. The machining module 11 is provided with a work table on the lower side and a machining drive unit on the upper side. In FIG. 2, only the machining drive unit of the machining module 11 covered by the machine body cover 12 is shown as being seen through.

  Among the processing modules 11, the work table hidden by the machine body cover 12 is fixed to the movable bed 13, a clamp mechanism is provided on the work table, and a workpiece to be processed is set. Above the work table, a spindle having a tool for machining the work is installed. The spindle has a structure capable of indexing with the vertical direction as a rotation axis, and a plurality of tools are attached to the outer periphery. For example, some of the tools are rotary tools such as milling and drills.

  The machining drive unit of the machining module 11 is a Z-axis moving body 15 for moving the spindle tool in the Z-axis direction, an X-axis moving body 16 for moving in the X-axis direction, and a Y-axis direction. Y-axis moving body 17 is provided. Here, the Z-axis is a vertical direction parallel to the rotation axis of the spindle. The X axis and the Y axis are moving axes for moving the tool forward and backward in a horizontal direction perpendicular to the Z axis. In this embodiment, the X axis direction is the width direction of the machine tool 10 and the Y axis direction is the machine tool. It is the front-rear direction of the machine 10.

  In the machining drive unit of the machining module 11, the Y-axis moving body 17 is mounted so as to be movable in the Y-axis direction with respect to the movable bed 13, and the X-axis moving body 16 is in the X-axis direction with respect to the Y-axis moving body 17. It is mounted so that it can move freely. Further, the Z-axis moving body 15 is mounted so as to be movable in the Z-axis direction with respect to the X-axis moving body 16, and the spindle is mounted on the Z-axis moving body 15. In the machine tool 10, three-axis moving bodies 15, 16, and 17 are arranged in the Y-axis direction, which is the longitudinal direction of the machine body. Each of the moving bodies 15, 16, and 17 is assembled by a sliding mechanism using an LM guide or the like.

  The Y-axis moving body 17 is mounted on a Y-axis rail fixed to the upper surface of the base of the moving bed 13 via a slider, and the X-axis moving body 16 is fixed to the front surface of the Y-axis moving body 17. It is mounted on the rail through a slider. The Z-axis moving body 15 is mounted on a Z-axis rail fixed to the front surface of the X-axis moving body 16 via a slider. The Y-axis moving body 17, the X-axis moving body 16, and the Z-axis moving body 15 are provided with a moving mechanism constituted by a ball screw, and the Y-axis direction, the X-axis direction, and the Position control in the Z-axis direction is performed.

  By the way, the machine tool line 1 shown in FIG. 1 has a plurality of machine tools 5 including the machine tool 10 arranged close to each other in the width direction, and has a very compact design as a whole. Each machine tool 5 is also designed with a small size in the width direction in order to achieve a compact processing machine line 1. Therefore, in the machine tool 10 which is one of the machine tools 5, as described above, the three-axis direction moving bodies 15, 16, and 17 are arranged so as to overlap each other in the Y-axis direction, and further the dimension in the width direction which is the X-axis direction. Is designed to be small. However, the machine tool 10 having a moving mechanism in the X-axis direction has a problem of securing a movable range in the X-axis direction in order to fully exhibit its function.

  Here, FIG. 3 is a front view showing the relationship between the X-axis moving body 16 and the machine body cover 12 of the machine tool 10. The moving mechanism of the X-axis moving body 16 is configured such that the slider 25 slides on a guide rail 26 extending in the X-axis direction. And the combination of the slider 25 and the guide rail 26 is provided in two places up and down. The X-axis moving body 16 integrated with the slider 25 is slidable, and reciprocating linear movement in the X-axis direction is given by driving the servo motor, and moves in a range between a right position indicated by a solid line and a left position indicated by a one-dot chain line. Is possible.

  The machine tool 10 has a moving distance B of the slider 25 in the X-axis direction of the tool attached via the X-axis moving body 16 and the Z-axis moving body 17 with respect to the width interval A between the left and right side walls of the machine body cover 12. It becomes a range of motion. The X-axis moving body 16 is supported by a pair of left and right sliders 25, but the interval C at which the pair of sliders 25 receives a load corresponds to the width dimension of the X-axis moving body 16. The X-axis moving body 16 supports the Z-axis slider 17 and its moving mechanism and spindle. For this reason, the sliding support portion of the X-axis moving body 16 is required to have rigidity for supporting a load. This includes the size of the slider 25 and the distance between the pair of sliders 25 (hereinafter referred to as “support distance”) C. Is desirable to be large.

  However, since the value of the width interval A of the machine body cover 12 is limited, if the support interval C increases, the movement distance B of the slider 25, that is, the movable range in the X-axis direction during machining of the tool decreases. End up. The machine tool 10 of the present embodiment is designed such that the width interval A of the body cover 12 is 445 mm, the movement distance B of the slider 25 is 190 mm, and the support interval C of the pair of sliders 25 is 120 mm. The value of the width interval A is common to each machine tool 5 of the processing machine line 1 and is designed so that the width dimension becomes small in all. In the processing machine line 1, the maximum workpiece diameter is set to 300 mm while the machine tool 5 is narrow (including the machine tool 10), and the width interval A is less than 1.5 times the workpiece diameter. The feature is that the ratio of workpiece diameter is large.

  Therefore, the machine tool 10 needs to secure a movable range (movement distance B) of the X-axis moving body 16 so that it can cope with machining of a large workpiece while reducing the width dimension (width interval A). On the other hand, in order to obtain sufficient rigidity for the sliding support portion of the X-axis moving body 16, a certain distance is required for the size of the slider 25 and the support interval C between the sliders 25. The problem that the width dimension becomes large conflicts. This is because if the width dimension of the X-axis moving body 16 is increased, the movable range of the X-axis moving body 16 in the machine body cover 12 is relatively reduced, and the machining range for the workpiece is also reduced. Therefore, in the machine tool 10 of the present embodiment, attention is paid to the fixing structure of the detachable cover at the position of interference with the X axis moving body 16.

  As shown in FIG. 2, the machine tool 10 has a structure in which the machine body cover 12 is divided into a plurality of parts and can be removed. The detachable cover 31 as one of them will be described. FIG. 4 is a perspective view showing the detachable cover 31 and its fixing structure from the inside of the body cover 12, and a part thereof is shown enlarged. The removable cover 31 is a rectangular thin flat plate, and an upper edge portion 32 and a lower edge portion 33 are configured as fixed portions. In particular, a fixing structure is formed on the lower edge 33 side that interferes with the X-axis moving body 16, and the upper edge 32 has a conventional fixing structure.

  First, the upper edge portion 32 is formed such that a step portion having a certain width is bent inward in the direction along the edge of the upper end (R direction), and a plurality of through holes 321 are formed therein. A plurality of through holes are also formed in the cover support portion 22 (see FIG. 2) of the body cover 12. When the detachable cover 31 is attached, the upper edge portion 32 and the cover support portion 22 overlap each other, the bolts that pass through both through holes are fastened to the nut, and the upper edge portion 32 of the detachable cover 31 is fixed.

  On the other hand, a fixing plate 35 is overlapped and joined to the lower edge 33 of the detachable cover 31 on the inner side. And the cover support part 23 (refer FIG. 2) of the body cover 12 to which this lower edge part 33 is fixed is a cross-sectional L-shaped board | plate material, and the fixed board 36 is joined to the standing part. The fixing plates 35 and 36 are formed with irregularities in the vertical direction along the surfaces of the detachable cover 31 and the cover support portion 23, plate-shaped concave portions 351 and 361 having a long dimension in the direction along the edge, and a plate having a short dimension. It has shape convex portions 352 and 362.

  In the fixing plate 35, a part of the plate-shaped convex portion 352 protrudes downward from the edge of the detachable cover 31, and the plate-shaped concave portion 351 is located above the edge. In the fixed plate 36, a part of the plate-shaped convex portion 362 protrudes upward with respect to the edge of the cover support portion 23, and the plate-shaped concave portion 361 is positioned below the edge. Therefore, the lower edge portion 33 and the cover support portion 23 are formed with fixing concave portions 41 and 42 which are recessed when viewed from the surface of the fixing plates 35 and 36 by the plate-shaped concave portions 351 and 361 when viewed in the plate thickness direction. Has been. And the protrusion parts 43 and 44 which protruded up and down from the edge by the plate-shaped convex parts 352 and 362 of the fixed plates 35 and 36 are formed. In the fixing structure of the present embodiment, the fixing recesses 41 and 42 and the protrusions 43 and 44 mesh with each other to create a fixing state.

  FIG. 5 is a perspective view showing a fixed state of the enlarged portion 100 shown in FIG. From the state shown in FIG. 4, the detachable cover 31 is lowered in the vertical direction along the surface with respect to the rising portion of the cover support portion 23 so that both end surfaces overlap each other. At this time, the protrusion 43 on the detachable cover 31 side enters the fixing recess 42 on the cover support 23 side, and the protrusion 44 on the cover support 23 side is relative to the fixing recess 41 on the detachable cover 31 side. Get in. As a result, the movement of the removable cover 31 in the plate thickness direction (X-axis direction shown in FIG. 2) is restricted, and the upper edge 32 is bolted as described above, so that the up-down direction and the front-rear direction (Z-axis direction). And in the Y-axis direction), the attachment with limited movement is completed.

  Incidentally, FIG. 6 is an enlarged cross-sectional view showing a fixed structure portion 200 surrounded by a square at the lower center of FIG. That is, it is a structure for fixing the lower edge portion 33 of the detachable cover 31 and is a view showing the relationship between adjacent machine tools 10. The gap D between the machine tools 10, that is, the gap D between the cover support portions 23 is 5 mm. The plate thickness E of the cover support portion 23 is 2.3 mm, the plate thickness F of the fixed plates 35 and 36 and the removable cover 31 is 1.6 mm, and the fixed plate 35 and 36 and the X-axis moving body 16 are closest to each other. The distance G is 2.2 mm.

  The processing machine line 1 is characterized by compactness, and not only the size of the machine tool 5 (including the machine tool 10) is reduced, but also the gap D between the machine tools is set to an extremely small value. Therefore, in the conventional fixing structure using a bolt, it is not possible to fit in this 5 mm gap, and the value of the gap D must be increased. Alternatively, it is necessary to reduce the movable range in the X-axis direction by moving the cover itself toward the inside of the machine, or to widen the machine tool 10 itself. In this regard, according to the fixing structure of the present embodiment, there is no portion protruding to the outside of the machine tool 10, and the dimension of the fixing portion in the plate thickness direction can be suppressed extremely small. Specifically, there is a space in the plate thickness direction corresponding to the plate thickness F (1.6 mm) of the fixing plates 35 and 36 for forming the fixing concave portions 41 and 42 and the protruding portions 43 and 44 that mesh with each other for fixing. It is only necessary.

  Therefore, in the fixing structure of the present embodiment, the gap D between the machine tools can be set to 5 mm. Accordingly, even if there is a dimensional error or a slight deviation occurs when the machine tool 10 is installed on the base, the error or deviation can be allowed. In particular, the machine tool 10 is movable on the base in the front-rear direction. Therefore, since the contact with the adjacent machine tool also hinders smooth movement, the effect of ensuring a 5 mm gap is great. Further, only the fixed plates 35 and 36 having a plate thickness of 1.6 mm exist inside the cover, and the movable range of the X-axis moving body 16 can be ensured to the maximum in the narrow machine tool 10.

  Furthermore, the fixing structure of the present embodiment has fixing plates 35 and 36 in which plate-shaped concave portions 351 and 361 and plate-shaped convex portions 352 and 362 are formed on the lower edge portion 33 of the detachable cover 31 and the standing portion of the cover support portion 23. This is due to a simple configuration that is simply joined. Therefore, the above effect can be achieved at low cost. Moreover, since it is the simple fixing method which meshes the recessed parts 41 and 42 for fixation, and the protrusion parts 43 and 44, handling is also easy. And it is convenient to handle because it does not require parts such as bolts and nuts.

  Subsequently, a modified example of the fixing structure of the detachable cover will be described. FIG. 7 is a perspective view showing the second embodiment of the fixing structure of the detachable cover, corresponding to the enlarged portion 100 of the detachable cover 31 shown in FIG. This fixing structure is constituted by a detachable cover 51 attached at the same position as the detachable cover 31 shown in FIG.

  The detachable cover 51 has a fixing plate 55 joined to the inside of the lower edge 52. The cover support portion 28 of the machine body cover 12 to which the lower edge portion 52 is fixed is a plate material having an L-shaped cross section, and a fixed plate 56 is joined to the standing portion. In this embodiment, not only the fixing plates 55 and 56 but also the lower edge portion 52 and the cover support portion 28 of the detachable cover 51 are uneven. The unevenness of the fixing plate 55 and the lower edge portion 52 and the unevenness of the fixing plate 56 and the cover support portion 28 are formed in substantially the same size, and the unevenness of the fixing plates 55 and 56 is formed in the lower edge portion 52 and the cover support portion. The projections and recesses 28 are joined with being shifted in the vertical direction along the surface and in the R direction along the edge.

  Here, FIG. 8 is a partial front view of the fixing structure showing the process from the removed state to the fixed state. First, as shown in the frame (1), the lower edge 52 of the detachable cover 51 located above the plate-shaped convex portion 522 is located above and to the right of the plate-shaped convex portion 552 of the fixed plate 55 in front of the drawing. It is shifted to. Thus, an inner support portion 61 of the fixing plate 55 that does not overlap the lower edge portion 52 and an outer support portion 62 of the lower edge portion 52 that does not overlap the fixing plate 55 are formed. In addition, the inside indicates that it is located on the inner side of the airframe that is the front side of the drawing, and the outer side indicates that it is located on the outer side of the airframe. same as below.

  On the other hand, in the cover support portion 28, the plate-shaped recess 282 of the cover support portion 28 is shifted upward and to the right with respect to the plate-shaped recess 562 of the fixed plate 56 in front of the drawing. As a result, an outer support portion 63 of the cover support portion 28 that does not overlap the fixing plate 56 and an inner support portion 64 of the fixing plate 56 that does not overlap the cover support portion 28 are formed. (3) As shown in the frame, the inner support portion 61 of the fixing plate 55 and the outer support portion 63 of the cover support portion 28 overlap, and the outer support portion 62 of the lower edge 52 and the inner support portion of the fixing plate 56. 64 overlap. The detachable cover 51 is fixed to the cover support portion 28 by such meshing. In the present embodiment, the fixing recesses when viewed in the plate thickness direction are the outer support portion 62 of the lower edge portion 52 and the outer support portion 63 of the cover support portion 28, and the protrusion protruding vertically from the edge. The parts are an inner support portion 61 of the fixed plate 55 and an inner support portion 64 of the fixed plate 56.

  By the way, the fixing structure of this embodiment is for implement | achieving toolless, and eliminates the bolting used in 1st Embodiment. That is, the structure shown in FIGS. 7 and 8 is formed symmetrically on the upper and lower edges of the removable cover 51 shown in FIG. 2, and the upper cover support 22 is also contrasted with the lower cover support 28. A structure is provided. Therefore, the attachment / detachment cover 31 is not engaged by moving in the vertical direction from the state of the frame (1) to the state shown in the frame (3) in FIG. This is performed so as to be fitted in a direction perpendicular to the surface 51 (X-axis direction shown in FIG. 2). The figure shown in the frame (2) in FIG. 8 shows the fitted state. Then, by sliding from the state to the right side of the drawing, (3) the fixed state shown in the frame is obtained.

  (2) In the state of the frame, the convex portions 522 and 552 on the lower edge portion 52 side are fitted into the plate-shaped concave portion 562 of the fixing plate 56 on the cover support portion 28 side. In this state, the inner support portion 61 of the fixing plate 55 and the outer support portion 63 of the cover support portion 28 are overlapped, but the outer support portion 62 of the lower edge 52 and the inner support portion 64 of the fixing plate 56 are not yet. There is no overlap. Therefore, by moving the detachable cover 51 along the edge (moving to the right side in FIG. 8), the outer support portion 62 of the lower edge portion 52 and the inner support portion 64 of the fixing plate 56 overlap, and the detachable cover 51 is The meshing state is restricted in the X-axis direction, which is the fitting direction. Such an action is the same in the fixing structure on the upper cover support portion 22 side.

  Therefore, according to the fixed structure of the present embodiment, as in the previous embodiment, there is no portion protruding to the outside of the machine tool 10, and the movable range of the X-axis moving body 16 is maximized in the narrow-width machine tool 10. Can be secured. Furthermore, the fixing structure of the present embodiment has a simple structure in which the fixing plates 55 and 56 are simply joined to the upper and lower edges of the detachable cover 51 and the cover support portions 22 and 28, and is effective at low cost. Can be achieved. Moreover, since it is based on the simple fixing method which meshes the recessed parts 41 and 42 for fixation, and the protrusion parts 43 and 44, handling is easy. In particular, it is easy to handle because it does not require any parts such as bolts and nuts, and is convenient in that it does not require tools.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to these, A various change is possible in the range which does not deviate from the meaning.
For example, the attaching / detaching cover fixing structure according to the present invention is extremely effective as a machine tool 10 according to the above-described embodiment, but is not limited to the machine tool 10, and is applicable to other structures. Can also be adopted.

DESCRIPTION OF SYMBOLS 1 ... Machining machine line 5,10 ... Machine tool 11 ... Processing module 12 ... Machine body cover 15 ... Z-axis moving body 16 ... X-axis moving body 17 ... Y-axis moving body 22, 23 ... Cover support part 31 ... Detachable cover 32 ... Upper edge 33 ... Lower edge 35, 36 ... Fixing plate 41, 42 ... Fixing recess 43, 44 ... Projection

Claims (4)

A detachable cover in which a part of a cover made of a thin plate is removable, and the detachable cover fixing structure that fixes the detachable cover and a cover support portion of the cover to which the detachable cover is attached,
The detachable cover has an upper and lower edge portion fixed to the cover support portion in an attached state, and at least one of the upper and lower edge portions and the cover support portion corresponding to the edge portion are arranged in the vertical direction along the surface. And
A plurality of fixing recesses recessed in the thickness direction and a plurality of protrusions protruding from the edge along the surface are formed on the edge portion of the removable cover and the cover support portion, and the edge portion of the removable cover and A fixing structure for a detachable cover, wherein the fixing concave portion and the projecting portion of the cover support portion mesh with each other.   The fixing concave portion and the protruding portion are obtained by joining a thin fixing plate having irregularities formed in a direction along the surface to an edge portion of the removable cover and the cover support portion which are thin plates. The detachable cover fixing structure according to claim 1. First concavo-convex is formed in the direction along the surface at the edge of the detachable cover that is a thin plate and the cover support part,
A thin fixing plate in which second unevenness having substantially the same size as the first unevenness is formed in a direction along the surface is joined to an edge portion of the removable cover and the cover support portion, respectively. ,
The fixing plate is joined at a position where the second unevenness is deviated from the first unevenness, and the attaching / detaching cover moves in a direction along the edge, so that the edge of the attaching / detaching cover and the cover supporting part The fixing structure for the detachable cover according to claim 1, wherein the fixing concave portion and the protruding portion formed on each other mesh with each other. In a machine tool having a processing module movable in the front-rear direction on a base as a base, the processing module is covered by a machine body cover made of a thin plate, and a removable cover is provided on the machine body cover ,
The upper and lower edges of the removable cover are fixed to the cover support part on the body cover main body side, and at least one of the upper and lower edges of the removable cover, and the cover support part corresponding to the edge part, Are arranged vertically along the surface,
A plurality of fixing recesses recessed in the thickness direction and a plurality of protrusions protruding from the edge along the surface are formed on the edge portion of the removable cover and the cover support portion, and the edge portion of the removable cover and The machine tool according to claim 1, wherein the fixing concave portion and the projecting portion of the cover support portion mesh with each other.

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