Machine tool

Abstract

To provide a machine tool which enables a cutting liquid to be returned easily to a processing chamber even if the cutting liquid enters a cover covering tool magazines which house tools.SOLUTION: A machine tool includes: magazines which house tools; a holding part which holds a workpiece; and a processing chamber which encloses the holding part and performs processing by the tool. An opening is formed on a wall of the processing chamber and the magazines are disposed inside and outside the processing chamber through the opening. The machine tool further includes a cover which covers the magazines and has a bottom surface inclining downwardly toward the wall.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present technology relates to a machine tool for machining a workpiece.

Background Art

[0002] There is a machine tool including a machining chamber and a tool storage chamber. The machining chamber and the tool storage chamber are adjacent to each other. A spindle is provided in the machining chamber. The tool storage chamber stores tools. A partition wall is provided between the tool storage chamber and the machining chamber. An opening and a shutter are provided in the partition wall. The shutter opens and closes the opening. When exchanging tools, the shutter opens, and the tool in the tool storage chamber and the tool mounted on the spindle are exchanged. A receiving member is adjacent to the opening. The receiving member guides cutting fluid into the machining chamber and suppresses the intrusion of the cutting fluid into the tool storage chamber (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When cutting fluid overflows from the receiving member, the cutting fluid accumulates in the tool storage chamber.

[0005] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a machine tool that can easily return the cutting fluid to the machining chamber even if the cutting fluid intrudes into a cover covering a tool magazine for storing tools.

Means for Solving the Problems

[0006] A machine tool according to an embodiment of the present disclosure includes a magazine for storing tools, a holding unit for holding a workpiece, and a processing chamber that surrounds the holding unit and performs processing with the tools. In the machine tool, an opening is formed in the wall of the processing chamber, the magazine is disposed inside and outside the processing chamber through the opening, and a cover is provided that covers the magazine and has a bottom surface that slopes downward toward the wall.

[0007] In the present disclosure, cutting fluid that has entered the cover moves from the bottom surface of the cover toward the processing chamber.

[0008] A machine tool according to an embodiment of the present disclosure, the bottom surface of the cover includes a first bottom surface that is located inside the processing chamber and slopes downward toward the wall.

[0009] In the present disclosure, the cutting fluid on the first bottom surface moves toward the processing chamber.

[0010] A machine tool according to an embodiment of the present disclosure, a gap is formed between the first bottom surface and the wall.

[0011] In the present disclosure, the cutting fluid moves through the gap into the processing chamber.

[0012] A machine tool according to an embodiment of the present disclosure, the bottom surface of the cover includes a second bottom surface that is located outside the processing chamber and slopes downward toward the wall.

[0013] In the present disclosure, the cutting fluid on the second bottom surface moves toward the processing chamber.

[0014] A machine tool according to an embodiment of the present disclosure, the cover includes an upper cover that covers the upper side of the magazine and is attached to the wall, and an inner cover that is located inside the processing chamber. The upper cover is configured to be able to change the vertical mounting position with respect to the inner cover.

[0015] In the present disclosure, the upper cover can be installed at a position corresponding to the vertical position of the magazine.

[0016] The machine tool according to an embodiment of the present disclosure, the cover is located outside the processing chamber, includes an outer cover attached to the wall, and a window enabling visual recognition of the inside of the cover is provided on the outer cover.

[0017] In the present disclosure, the tools stored in the magazine can be confirmed through the window.

[0018] The machine tool according to an embodiment of the present disclosure, the vertical position of the magazine is selected from a plurality of vertical positions, the outer cover has dimensions corresponding to the selected vertical position of the magazine, and includes an attachment portion attached to the wall.

[0019] In the present disclosure, an outer cover having an attachment portion corresponding to the vertical position of the magazine can be used.

[0020] The machine tool according to an embodiment of the present disclosure includes a column supporting the magazine and the control panel, the processing chamber is arranged on the first surface side of the column, the control panel is arranged on the second surface side located on the opposite side of the first surface of the column, the magazine is arranged on the third surface side intersecting the first surface and the second surface of the column, the tools are stored in the magazine with the cutting edges facing the opposite side of the column, and the wiring for connecting the inside of the processing chamber and the control panel is arranged between the magazine and the column on the upper side of the cover.

[0021] In the present disclosure, the wiring can be arranged on the opposite side of the cutting edge of the tool.

[0022] The machine tool according to an embodiment of the present disclosure, the processing chamber includes a removable side portion intersecting the wall, and the cover includes a removable second side portion facing the side portion.

[0023] In the present disclosure, the side portion and the second side can be removed to perform maintenance management of the machine tool.

Advantages of the Invention

[0024] In a machine tool according to an embodiment of the present disclosure, since the cutting fluid that has entered the cover moves from the bottom surface of the cover toward the machining chamber, it is easy to return the cutting fluid to the machining chamber.

Brief Description of the Drawings

[0025]

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Mode for Carrying Out the Invention

[0026] The following will be described based on the drawings showing a machine tool according to an embodiment of the present invention. In the following description, the up-down, front-back, left-right directions shown in the drawings are used. FIG. 1 is a schematic perspective view of a machine tool with the machining chamber and cover omitted, FIG. 2 is a schematic left side view of a machine tool with the machining chamber and cover omitted, and FIG. 3 is a schematic plan view of a machine tool with the machining chamber and cover omitted.

[0027] The machine tool includes a base 1, a workpiece holding part 2, an XY moving mechanism 3, a column 4, a Z moving mechanism 5, a first magazine 6, two second magazines 7, 8, a spindle head 10, etc. The base 1 is rectangular in plan view and extends in the front-back direction. An XY moving mechanism 3 that can move in the left-right direction (X direction) and the front-back direction (Y direction) is provided on the upper front side of the base 1. A workpiece holding part 2 is provided above the XY moving mechanism 3. By the XY moving mechanism 3, the workpiece holding part 2 moves in the X and Y directions. The workpiece holding part 2 holds a workpiece.

[0028] A column 4 is provided on the upper rear side of the base 1 via a height adjustment part 4a. The column 4 has a rectangular parallelepiped shape having a front surface, a rear surface, and left and right side surfaces. A control device 35 is provided on the rear surface of the column 4. The control device 35 controls the drive of the machine tool. A Z moving mechanism 5 that can move in the vertical direction (Z direction) is provided on the front surface of the column 4. A spindle head 10 is provided on the Z moving mechanism 5. The spindle head 10 includes a spindle 10a that extends vertically. A tool is attached to the lower end of the spindle 10a.

[0029] A first magazine 6 for storing a plurality of tools is provided on the front side of the spindle head 10. The first magazine 6 is connected to the column 4 via two first support parts 20, 25. One first support part 20 projects forward from the left front part of the column 4. The other first support part 25 projects forward from the right front part of the column 4. The first magazine 6 is connected to the protruding ends of each of the first support parts 20, 25. The first magazine 6 includes a disk 6a and an arm 6b. A motor (not shown) is connected to the disk 6a, and the disk 6a rotates around its central axis by the drive of the motor. A plurality of arms 6b are provided radially on the peripheral edge of the disk 6a. Each arm 6b holds a tool.

[0030] The first magazine 6 is arranged such that the central axis of the disk 6a extends substantially in the front-rear direction and the disk 6a is in a forward-tilted posture. The lower end position of the first magazine 6 is the tool change position. When mounting a tool on the spindle, the arm 6b holding the tool is arranged at the tool change position, and the Z movement mechanism 5 is moved downward. Based on the downward movement of the Z movement mechanism 5, the spindle 10a mounts the tool held by the arm 6b. When removing the tool from the spindle 10a, the empty arm 6b is arranged at the tool change position, and the Z movement mechanism 5 is moved upward. Based on the upward movement of the Z movement mechanism 5, the arm 6b grips the tool on the spindle 10a, and the tool comes out of the spindle 10a.

[0031] The tool mounted on the spindle 10a processes the workpiece held by the workpiece holding portion 2. A nozzle (not shown) for injecting cutting fluid is provided in the machining chamber 40. The nozzle injects cutting fluid onto the tool and the workpiece during machining. The cutting fluid adheres to the tool. The XY movement mechanism 3 adjusts the front-rear, left-right positions of the workpiece relative to the tool (spindle), and the Z movement mechanism 5 adjusts the vertical position of the tool.

[0032] A second magazine 7 is arranged on the right side of the column 4, and a second magazine 8 is arranged on the left side. The second support portion 30 connects the rear end portion of the left first support portion 20, that is, the connecting portion of the first support portion 20 with the column 4, and the second magazine 8. The second support portion 30 supports the second magazine 8. The second support portion 31 connects the rear end portion of the right first support portion 25, that is, the connecting portion of the first support portion 25 with the column 4, and the second magazine 7. The second support portion 31 supports the second magazine 7.

[0033] The second magazine 8 includes a disk-shaped wheel 8a and a plurality of arms 8b. The central portion in the radial direction of the wheel 8a protrudes in the axial direction. With the central portion in the radial direction as the apex, the wheel 8a is generally in the shape of a frustum of a cone. A plurality of arms 8b are provided on the outer periphery of the wheel 8a. The plurality of arms 8b are arranged in the circumferential direction of the wheel 8a. Each arm 8b can hold a tool. The second magazine 8 stores a plurality of tools. The central portion in the radial direction on the concave side of the wheel 8a is connected to the motor 8c and a speed reducer (not shown). By the rotation of the motor 8c, the wheel 8a and the arms 8b rotate in the circumferential direction.

[0034] A transfer device 9 is disposed inside the wheel 8a. The transfer device 9 transfers tools. The transfer device 9 performs the transfer of tools between the arm 6b of the first magazine 6 and the arm 8b of the second magazine 8. That is, the second magazine 8 is configured to be tool-exchangeable with the first magazine 6. By providing the second magazine 8, the number and types of available tools can be increased compared to the case where only the first magazine 6 is provided.

[0035] The second magazine 7 is disposed symmetrically with the second magazine 8 about the left and right, and since its configuration is the same as that of the second magazine 8, a detailed description thereof will be omitted. A transfer device is also provided inside the second magazine 7, and the transfer device performs the transfer of tools between the arm 6b of the first magazine 6 and the arm 8b of the second magazine 7.

[0036] FIG. 4 is a schematic perspective view of the machine tool, FIG. 5 is a schematic left side view of the machine tool, FIG. 6 is a schematic plan view of the machine tool, and FIG. 7 is a schematic front view of the left rear wall 45, the right rear wall 43, the column 4, and the second magazines 7 and 8. The machine tool includes a machining chamber 40. The machining chamber 40 is provided on the base 1 and includes a front wall 41, a right wall 42, a right rear wall 43, a left wall 44, a left rear wall 45, a ceiling 46, and a protrusion 47.

[0037] The front wall 41 is rectangular in a front view. The left edge of the front wall 41 is located to the left of the second magazine 8 on the left side, and the right edge of the front wall 41 is located to the right of the second magazine 7 on the right side. The front wall 41 is located in front of the base 1. The upper edge of the front wall 41 faces the vicinity of the center of the first magazine 6, and the vertical position of the lower edge of the front wall 41 is substantially the same as the vicinity of the upper surface of the base 1. The lower edge of the front wall 41 and the front edge of the upper surface of the base 1 are connected by an inclined portion (not shown) that slopes downward as it goes to the rear side. A rectangular opening is formed in the central portion of the front wall 41, and an opening / closing door 41a is provided in the opening. An operation panel 41b is provided to the right adjacent to the opening / closing door 41a on the front wall 41.

[0038] The left wall 44 is rectangular in a left side view. The left wall 44 is located on the left side of the base 1. The vertical dimension of the left wall 44 is substantially the same as the vertical dimension of the front wall 41. The entire front edge of the left wall 44 is continuous with the entire left edge of the front wall 41. The position of the rear edge of the left wall 44 in the front-rear direction is substantially the same as the position of the front part of the column 4. A rectangular opening is formed in the central part of the left wall 44, and a removable left side surface part 44a is provided in the opening. The left side surface part 44a corresponds to the side surface part. The lower edge of the left wall 44 and the upper left edge of the upper surface of the base 1 are connected by an inclined part (not shown) that slopes downward toward the right side.

[0039] As shown in FIG. 7, the left rear wall 45 is U-shaped in a front view. The left rear wall 45 is provided on the left side of the column 4. The upper right end of the left rear wall 45 is located below the upper left end. The inner edge of the left rear wall 45 forms an opening 45a with the upper side open. A groove 45b with an L-shaped cross section along the inner edge is formed on the rear surface of the left rear wall 45 (see FIG. 13). The vertical dimension of the left part of the left rear wall 45 is substantially the same as the vertical dimension of the left wall 44. The entire left edge of the left rear wall 45 is continuous with the entire rear edge of the left wall 44. The right part of the left rear wall 45 is adjacent to the column 4. The entire lower edge of the left rear wall 45 is adjacent to the upper surface of the base 1.

[0040] The right wall 42 is rectangular in a right side view. The right wall 42 is located on the right side of the base 1. The vertical dimension of the right wall 42 is substantially the same as the vertical dimension of the front wall 41. The entire front edge of the right wall 42 is continuous with the entire right edge of the front wall 41. The position of the rear edge of the right wall 42 in the front-rear direction is substantially the same as the position of the front part of the column 4. A rectangular opening is formed in the central part of the right wall 42, and a removable right side surface part 42a is provided in the opening. The lower edge of the right wall 42 and the upper right edge of the upper surface of the base 1 are connected by an inclined part (not shown) that slopes downward toward the left side.

[0041] As shown in FIG. 7, the right rear wall 43 is U-shaped when viewed from the front. The right rear wall 43 is provided on the right side of the column 4. The upper left end of the right rear wall 43 is located lower than the upper right end. The inner edge of the right rear wall 43 forms an opening 43a with the upper side open. A groove 43b with an L-shaped cross section along the inner edge is formed on the rear surface of the right rear wall 43. The vertical dimension of the right part of the right rear wall 43 is substantially the same as the vertical dimension of the right wall 42. The entire right edge of the right rear wall 43 is continuous with the entire rear edge of the right wall 42. The left part of the right rear wall 43 is adjacent to the column 4. The entire lower edge of the right rear wall 43 is adjacent to the upper surface of the base 1.

[0042] The ceiling 46 is horizontally long U-shaped when viewed from above. A concave portion 46a is formed at the center of the rear edge of the ceiling 46. The entire front edge of the ceiling 46 is continuous with the entire upper edge of the front wall 41. A protrusion 47 is provided above the concave portion 46a. The protrusion 47 includes a front plate 47a, an upper plate 47b, a right side plate 47c, and a left side plate 47d. The front plate 47a is horizontally long rectangular when viewed from the front, and the entire lower edge of the front plate 47a is continuous with the entire front edge of the concave portion 46a. The upper plate 47b is horizontally long rectangular when viewed from above, and the entire front edge of the upper plate 47b is continuous with the entire upper edge of the front plate 47a.

[0043] The right side plate 47c is trapezoidal with a right angle when viewed from the right side. The upper base of the right side plate 47c is shorter than the lower base, and in a right side view, the upper base and the front edge form a right angle, and the lower base and the front edge form a right angle. The entire upper base of the right side plate 47c is continuous with the entire right edge of the upper plate 47b. The entire lower base of the right side plate 47c is continuous with the entire right edge of the concave portion 46a. The entire front edge of the right side plate 47c is continuous with the entire right edge of the front plate 47a.

[0044] The left side plate 47d is trapezoidal with a right angle when viewed from the left side. The upper base of the left side plate 47d is shorter than the lower base, and in a left side view, the upper base and the front edge form a right angle, and the lower base and the front edge form a right angle. The entire upper base of the left side plate 47d is continuous with the entire left edge of the upper plate 47b. The entire lower base of the left side plate 47d is continuous with the entire left edge of the concave portion 46a. The entire front edge of the left side plate 47d is continuous with the entire left edge of the front plate 47a. The rear side of the protrusion 47 is open.

[0045] The front wall 41, the right wall 42, the right rear wall 43, the left wall 44, the left rear wall 45, and the ceiling 46 surround the components on the front side of the column 4, such as the work holding portion 2, the XY moving mechanism 3, the Z moving mechanism 5, the first magazine 6, and the spindle head 10. The upper part of the first magazine 6 protrudes above the front wall 41, the right wall 42, the right rear wall 43, the left wall 44, the left rear wall 45, and the ceiling 46. The protruding body 47 covers the front side, the upper side, and the left and right sides of the upper part of the first magazine 6. That is, the processing chamber 40 houses the work holding portion 2, the XY moving mechanism 3, the Z moving mechanism 5, the first magazine 6, the spindle head 10, and the first magazine 6.

[0046] As shown in FIGS. 6 and 7, the second magazine 7 on the right side is disposed inside the opening 43a. The front portion of the second magazine 7 is located on the front side of the opening 43a, that is, inside the processing chamber 40. The rear portion of the second magazine 7 is located on the rear side of the opening 43a, that is, outside the processing chamber 40. The second magazine 8 on the left side is disposed inside the opening 45a. The front portion of the second magazine 8 is located on the front side of the opening 45a, that is, inside the processing chamber 40. The rear portion of the second magazine 8 is located on the rear side of the opening 45a, that is, outside the processing chamber 40.

[0047] The periphery of the second magazine 8 is covered by a cover 50. The cover 50 includes an inner cover 51 and an outer cover 57. FIG. 8 is a perspective view of the inner cover 51, FIG. 9 is a front view of the inner cover 51, FIG. 10 is a rear view of the inner cover 51, FIG. 11 is a plan view of the inner cover 51, FIG. 12 is a right side view of the inner cover 51, FIG. 13 is a cross-sectional view taken along the cutting line XIII-XIII shown in FIG. 10, and FIG. 14 is a cross-sectional view taken along the cutting line XIV-XIV shown in FIG. 10. Note that FIG. 13 also shows the left rear wall 45, the outer cover 57, etc. in addition to the inner cover 51. The inner cover 51 includes a front plate 52, a right plate 53, an upper left plate 54, a lower left plate 55, a bottom plate 56, etc. The bottom plate 56 corresponds to the first bottom surface.

[0048] FIG. 15 is a front view of the front plate 52, FIG. 16 is a plan view of the front plate 52, FIG. 17 is a left side view of the front plate 52, and FIG. 18 is a rear view of the front plate 52. The front plate 52 is quadrangular in front view, the inner angle of the upper right corner is approximately 90 degrees, the inner angle of the upper left corner is about 80 degrees, the inner angle of the lower left corner is about 110 degrees, and the inner angle of the lower right corner is about 80 degrees. A horizontally long rectangular opening 52e is formed in the central portion of the front plate 52. The opening 52e is inclined so as to rise toward the right side. On the back surface of the front plate 52, a shutter 52a that can move up and down and a drive unit 52b that drives the shutter 52a are provided. By driving the drive unit 52b, the shutter 52a moves up and down to open and close the opening 52e.

[0049] A connecting plate 52d is continuous with the left edge portion of the front plate 52. The connecting plate 52d has a rectangular shape extending vertically. The front plate 52 is connected to the upper left plate 54 and the lower left plate 55 via the connecting plate 52d. A connecting portion 52c is provided at the left end of the upper edge portion of the front plate 52. The front plate 52 is connected to the ceiling 46 via the connecting portion 52c.

[0050] FIG. 19 is a left side view of the upper left plate 54, FIG. 20 is a plan view of the upper left plate 54, and FIG. 21 is a front view of the upper left plate 54. The upper left plate 54 includes a plate portion 54a having a pentagonal shape in left side view. The inner angle of the front upper corner of the plate portion 54a is about 80 degrees, the inner angle of the rear upper corner is about 140 degrees, the inner angle of the rear central portion is about 120 degrees, the inner angle of the rear lower corner is about 90 degrees, and the inner angle of the front lower corner is about 110 degrees. An upper plate portion 54b is provided at the upper edge portion of the upper left plate 54. The upper plate portion 54b has an elongated isosceles triangular shape in plan view with a vertex on the rear side. The front edge portion of the upper plate portion 54b is bent downward. Two insertion holes 54f for inserting bolts (not shown) are formed in the bent front edge portion. A belt upper portion 54d extending in the front-rear direction is provided at the lower edge portion of the upper left plate 54. A connecting portion 54c is provided at the lower end of the rear edge portion of the upper left plate 54. The connecting portion 54c includes a female screw penetrating in the front-rear direction.

[0051] FIG. 22 is a left side view of the lower left plate 55, and FIG. 23 is a rear view of the lower left plate 55. As shown in FIG. 22, the lower left plate 55 is rectangular in a left side view, the inner angle at the front upper end is approximately 80 degrees, the inner angle at the front lower end is about 120 degrees, the inner angle at the rear lower end is about 80 degrees, and the inner angle at the rear upper end is about 80 degrees. The lower left plate 55 is configured to be removable. The lower left plate 55 corresponds to the second side surface. An operator can remove the left side surface portion 44a and the lower left plate 55 and perform maintenance management on, for example, the second magazine 8 or the spindle head 10.

[0052] FIG. 24 is a perspective view of the right plate 53 and the bottom plate 56, FIG. 25 is a front view of the right plate 53 and the bottom plate 56, FIG. 26 is a right side view of the right plate 53 and the bottom plate 56, and FIG. 27 is a plan view of the right plate 53 and the bottom plate 56. As shown in FIG. 26, the right plate 53 is rectangular in a right side view, the inner angle at the rear upper end is approximately 90 degrees, the inner angle at the front upper end is about 80 degrees, the inner angle at the front lower end is about 110 degrees, and the inner angle at the rear lower end is about 80 degrees. A concave portion 53f is formed at the vertical center of the rear edge portion of the right plate 53. The concave portion 53f has a U shape with the front side as the bottom side. The upper edge and the lower edge of the concave portion 53f are substantially perpendicular to the front edge of the concave portion 53f. The front-rear dimension of the lower edge of the concave portion 53f is longer than that of the upper edge. In the rear edge portion of the right plate 53, the portion below the concave portion 53f is located more rearward than the portion above the concave portion 53f.

[0053] A connecting portion 53a is provided at the bottom of the concave portion 53f, that is, at the front edge of the concave portion 53f. A connecting portion 53e is formed in the portion below the concave portion 53f in the rear edge portion of the right plate 53. The connecting portion 53e has a vertically long rectangular shape and protrudes to the right from the rear edge portion of the right plate 53. A connecting portion 53b is formed in the portion above the concave portion 53f in the rear edge portion of the right plate 53. The connecting portion 53b has a vertically long rectangular shape and protrudes to the right from the rear edge portion of the right plate 53. The right plate 53 is connected to the first support portion 20 via the connecting portion 53a and the connecting portion 53b. The right plate 53 is connected to the left rear wall 45 via the connecting portion 53e.

[0054] A connecting portion 53g is formed across the entire front edge of the right plate 53. The connecting portion 53g is strip-shaped and extends vertically, protruding to the left from the front edge of the right plate 53. The left - right dimension at the center in the vertical direction of the connecting portion 53g is shorter than that of other portions. The right plate 53 is connected to the front plate 52 via the connecting portion 53g. An upper plate 53c is formed at the upper edge of the right plate 53. The upper plate 53c is rectangular and long in the front - rear direction, protruding to the left from the upper edge of the right plate 53. A mounting plate 53d is provided on the upper plate 53c.

[0055] As shown in FIG. 27, the bottom plate 56 is square in plan view. The inner angle at the right - rear end is approximately 90 degrees, the inner angle at the left - rear end is about 80 degrees, the inner angle at the left - front end is about 80 degrees, and the inner angle at the right - front end is about 110 degrees. The bottom plate 56 is inclined so as to descend toward the rear side. A connecting portion 56a is formed at the rear - edge portion of the bottom plate 56. The connecting portion 56a is horizontally long and rectangular, protruding downward from the rear - edge portion of the bottom plate 56. The connecting portion 56a is located on the front side of the connecting portion 53e. As shown in FIGS. 24 and 25, two insertion holes 56h for inserting a bolt 56g (see FIG. 13) are formed in the connecting portion 56a. The two insertion holes 56h are arranged side by side in the left - right direction. The connecting portion 56a is connected to a connecting member (see FIG. 13) described later and is connected to the outer cover 57.

[0056] A connecting portion 56b is formed at the front - edge portion of the bottom plate 56. The connecting portion 56b is horizontally long and rectangular, protruding upward from the front - edge portion of the bottom plate 56. A connecting portion 56c is formed at the left - edge portion of the bottom plate 56. The connecting portion 56c is rectangular and long in the front - rear direction, protruding upward from the left - edge portion of the bottom plate 56. The bottom surface 56 is connected to the front plate 52 via the connecting portion 56b, and the bottom surface 56 is connected to the lower - left plate 55 via the connecting portion 56c. The lower - edge portion of the right plate 53 and the right - edge portion of the bottom plate 56 are integrally continuous.

[0057] As described above, the connecting portion 56a is located on the front side of the connecting portion 53e, and the connecting portion 53e is connected to the left - rear wall 45. Therefore, as shown in FIG. 13, a gap 49 is formed between the connecting portion 56a and the left - rear wall 45. The gap 49 is formed across the entire left - right width of the connecting portion 56a.

[0058] FIG. 28 is a perspective view of the outer cover 57, FIG. 29 is a front view of the outer cover 57, FIG. 30 is a plan view of the outer cover 57, FIG. 31 is a rear view of the outer cover 57, FIG. 32 is a left side view of the outer cover 57, and FIG. 33 is a right side view of the outer cover 57. As shown in FIG. 30, the outer cover 57 includes a bottom plate 64 having a pentagonal shape in plan view. The bottom plate 64 corresponds to the second bottom surface. The bottom plate 64 includes a front side 64a, a first right side 64b, a second right side 64c, a rear side 64d, and a left side 64e.

[0059] The front side 64a extends horizontally. The first right side 64b extends rearward from the right end of the front side 64a at a substantially right angle. The length of the first right side 64b is about 1 / 4 of the front side 64a. The second right side 64c extends obliquely rearward to the left such that the interior angle with respect to the first right side 64b is about 150 degrees. The length of the second right side 64c is about three times that of the first right side 64b. The rear side 64d extends horizontally and is substantially parallel to the front side 64a. The left end of the rear side 64d is located slightly to the left of the left end of the front side 64a. The length of the rear side 64d is slightly shorter than the front side 64a. The left side 64e connects the left end of the rear side 64d and the left end of the front side 64a. The interior angle between the left side 64e and the rear side 64d is slightly less than 90 degrees, and the interior angle between the left side 64e and the front side 64a is slightly greater than 90 degrees. That is, the left side 64e is inclined with respect to the front side 64a and the rear side 64d so as to be located more to the right as it faces the front side. The bottom plate 64 is inclined so as to descend as it faces the front side.

[0060] As shown in FIG. 32, the outer cover 57 includes a left plate 59 having a trapezoidal shape in a left side view. The left plate 59 includes a front side 59b, an upper side 59c, a rear side 59d, and a lower side 59e. The left plate 59 has a trapezoidal shape with the front side 59b and the rear side 59d as the upper and lower bases, and the upper side 59c and the lower side 59e as the legs. The vertical dimension of the front side 59b is longer than that of the rear side 59d. The upper side 59c is substantially perpendicular to the front side 59b and the rear side 59d. The lower side 59e is inclined so as to descend as it faces the front side. The rear end of the lower side 59e is located slightly to the left of the front end of the lower side 59e. The lower side 59e substantially coincides with the left side 64e of the bottom plate 64. That is, the lower side 59e and the left side 64e are integrally continuous. The left plate 59 is inclined so as to descend as it faces the right side, except for the upper end portion 59f. The upper end portion 59f has a strip shape extending in the front-rear direction and is arranged substantially vertically. A substantially rectangular transparent window 59a is provided at the central portion of the left plate 59. An operator can check the tools stored in the second magazine 8 through the window 59a.

[0061] As shown in FIG. 33, the outer cover 57 includes a right plate 61 having a trapezoidal shape in a right side view. The right plate 61 includes a front side 61a, an upper side 61b, a rear side 61c, and a lower side 61d. The right plate 61 has a trapezoidal shape with the front side 61a and the rear side 61c as the upper and lower bases, and the upper side 61b and the lower side 61d as the legs. The vertical dimension of the front side 61a is longer than that of the rear side 61c. The upper side 61b is substantially perpendicular to the front side 61a and the rear side 61c. The lower side 61d is inclined so as to descend as it faces the front side. The lower side 61d substantially coincides with the second right side 64c of the bottom plate 64. That is, the lower side 61d and the second right side 64c are integrally continuous. The front side 61a is located behind the front side 59b of the left plate 59. As shown in FIG. 30, the right plate 61 is inclined with respect to the rear side 64d so as to be located more to the right as it faces the front side.

[0062] As shown in FIG. 31, the outer cover 57 includes a rear plate 60 having a trapezoidal shape when viewed from the rear. The rear plate 60 includes a first left side 60a, a second left side 60b, an upper side 60c, a right side 60d, and a lower side 60e. The rear plate 60 has a trapezoidal shape with the upper side 60c and the lower side 60e as the upper and lower bases, and the first left side 60a, the second left side 60b, and the right side 60d as the legs. The left - right dimension of the upper side 60c is longer than that of the lower side 60e. The right side 60d is substantially perpendicular to the upper side 60c and the lower side 60e. The first left side 60a extends obliquely upward to the left from the lower side 60e to near the left end of the upper side 60c. The left - right position of the upper end of the first left side 60a is substantially the same as the left end of the upper side 60c. The second left side 60b connects the left end of the upper side 60c and the upper end of the first left side 60a. The second left side 60b is substantially perpendicular to the upper side 60c. The length of the second left side 60b is about 1 / 15 of that of the first left side 60a. That is, the rear plate 60 forms a pentagon close to a trapezoid.

[0063] The lower side 60e substantially coincides with the rear side 64d of the bottom plate 64. That is, the lower side 60e and the rear side 64d are integrally continuous. The second left side 60b substantially coincides with the rear side of the upper end portion 59f, and the first left side 60a substantially coincides with the rear side 59d of the left plate 59 excluding the rear side of the upper end portion 59f. That is, the first left side 60a, the second left side 60b, and the rear side 59d are integrally continuous. The right side 60d substantially coincides with the rear side 61c of the right plate 61. That is, the right side 60d and the rear side 61c are integrally continuous.

[0064] As shown in FIGS. 28, 30, and 33, a first protruding plate 62 protrudes to the right from the upper part of the front side 61a of the right plate 61. As shown in FIG. 29, the first protruding plate 62 has a vertically long rectangular shape when viewed from the front. The protruding end portion of the first protruding plate 62 is bent toward the rear side. A second protruding plate 63 protrudes to the front from the lower side of the first protruding plate 62. As shown in FIG. 30, the second protruding plate 63 has a square shape when viewed from the plane. The left front part of the second protruding plate 63 protrudes slightly more forward than the right front part.

[0065] As shown in FIG. 33, the outer cover 57 includes a connecting plate 65 having a trapezoidal shape in a right side view. The connecting plate 65 includes a front side 65a, an upper side 65b, a rear side 65c, and a lower side 65d. The connecting plate 65 has a trapezoidal shape with the front side 65a and the rear side 65c as the upper and lower bases, and the upper side 65b and the lower side 65d as the legs. The vertical dimension of the front side 65a is longer than that of the rear side 65c. The upper side 65b is substantially perpendicular to the front side 65a and the rear side 65c. The lower side 65d is inclined so as to descend toward the front side. The lower side 65d substantially coincides with the first right side 64b of the bottom plate 64. That is, the lower side 65d and the first right side 64b are integrally continuous. The rear side 65c substantially coincides with the front side 61a of the right plate 61 below the first protruding plate 62. That is, the rear side 65c and the front side 61a of the right plate 61 below the first protruding plate 62 are integrally continuous. The connecting plate 65 connects the second protruding plate 63 and the right plate 61.

[0066] As shown in FIG. 29, the outer cover 57 includes a front plate 58 having a U shape in a front view. The front plate 58 includes a first lower side 58c, a first right side 58d, a first upper side 58e, a second right side 58f, a second lower side 58g, a second left side 58h, a second upper side 58j, and a first left side 58k. The first lower side 58c extends horizontally. The first right side 58d extends upward at a substantially right angle from the right end of the first lower side 58c. The length of the first right side 58d is about 70% of the first lower side 58c. The first upper side 58e extends leftward at a substantially right angle from the upper end of the first right side 58d. The first upper side 58e is substantially parallel to the first lower side 58c. The length of the first upper side 58e is about 10% of the first right side 58d. The second right side 58f extends downward at a substantially right angle from the left end of the first upper side 58e. The length of the second right side 58f is about 40% of the first right side 58d.

[0067] The second lower side 58g extends leftward from the lower end of the second right side 58f at a substantially right angle. The length of the second lower side 58g is about 80% of that of the first right side 58d. The second left side 58h extends obliquely upward to the left from the left end of the second lower side 58g. The length of the second left side 58h is about 1.2 times that of the first right side 58d. The second upper side 58j extends leftward from the left end of the second left side 58h. The second upper side 58j is substantially parallel to the first lower side 58c. The length of the second upper side 58j is about the same as that of the first upper side 58e. The first left side 58k connects the left end of the second upper side 58j and the left end of the first lower side 58c. The first left side 58k is substantially perpendicular to the second upper side 58j and the first lower side 58c.

[0068] The first upper side 58e is integrally continuous with the left front portion of the second protruding plate 63. The second right side 58f is integrally continuous with the front side 65a of the connecting plate 65. As shown in FIG. 29, the second lower side 58g is integrally continuous with the front side 64a of the bottom plate 64 except for the left end portion. The second left side 58h is located slightly to the right of the left plate 59. The left end of the second upper side 58j is integrally continuous with the lower end of the front side of the upper end portion 59f.

[0069] As shown in FIG. 29, in the front plate 58, the portion between the first lower side 58c and the second lower side 58g extends below the front side 64a of the bottom plate 64, and the portion between the first right side 58d and the second right side 58f extends to the right of the connecting plate 65. The portion between the second left side 58h and the first left side 58k extends to the right of the left plate 59 and also extends to the left. That is, the left plate 59 is disposed between the second left side 58h and the first left side 58k.

[0070] As shown in FIGS. 28 and 29, two connecting members 58a are provided at the lower part of the front plate 58. The connecting member 58a has a U-shaped configuration in plan view with the front side being the bottom side, and both end portions on the rear side are fixed to the front plate 58. That is, the connecting member 58a penetrates vertically. A female screw penetrating through in the front-rear direction is formed at the front portion of the connecting member 58a. One connecting member 58a is disposed substantially directly below the right end of the second lower side 58g. The other connecting member 58a is disposed below the left portion of the second lower side 58g. The two connecting members 58a are arranged side by side left and right. A plurality of insertion holes 58b for inserting bolts are formed along the outer periphery of the front plate 58. Also, a second insertion hole 58m for inserting a bolt is formed at the upper left portion of the front plate 58. The front plate 58, particularly the portion below the second lower side 58g of the front plate 58, corresponds to the mounting portion.

[0071] A method of attaching the outer cover 57 to the left rear wall 45 will be described. As shown in FIGS. 7 and 13, on the back surface of the left rear wall 45, a groove 45b is formed along the edge of the U-shaped opening 45a. That is, the groove 45b has a U-shaped configuration. The U-shaped configuration of the groove 45b corresponds to the U-shaped configuration formed by the first lower side 58c, the first right side 58d, the first upper side 58e, and the first left side 58k of the front plate 58. A sealing member 70 is provided along the groove 45b. Through the sealing member 70, the outer peripheral portion of the front plate 58, that is, the portion along the first lower side 58c, the first right side 58d, the first upper side 58e, and the first left side 58k faces the groove 45b, and the outer cover 57 is arranged such that the two connecting members 58a are positioned inside the opening 45a. From the rear side, bolts (not shown) are inserted into the respective insertion holes 58b. Female screw holes (not shown) are provided at positions corresponding to the respective insertion holes 58b in the groove 45b. The bolts are connected to the female screw holes to fix the front plate 58 to the left rear wall 45.

[0072] The attachment method of the inner cover 51 will be described. As shown in Fig. 13, place the inner cover 51 on the front side of the left rear wall 45 such that the front plate 52 faces the opening 45a and the two insertion holes 56h face the two connecting members 58a. Insert bolts 56g into the respective insertion holes 56h from the front side, connect them to the female threads of the respective connecting members 58a, and fix the lower edge portion of the inner cover 51 to the lower portion of the outer cover 57. Also, insert bolts into the second insertion holes 58m of the outer cover 57 from the rear side and connect them to the female threads of the connecting portion 54c of the inner cover 51. Also, as described above, the inner cover 51 is connected to the left rear wall 45 via the connecting portion 53e and is connected to the first support portion 20 via the connecting portions 53a and 53b. As shown in Fig. 13, a gap 49 is formed between the connecting portion 56a and the left rear wall 45.

[0073] The recess 53f, the first protruding plate 62, and the second protruding plate 63 face each other front and back, and the second support portion 30 is inserted into the space surrounded by the recess 53f, the first protruding plate 62, and the second protruding plate 63.

[0074] As shown in Figs. 4 and 5, the cover 50 includes an upper cover 66. The upper cover 66 is provided on the inner cover 51 and the outer cover 57 so as to surround the front edge portion and the left edge portion of the upper plate portion 54b, the upper end portion 59f, the upper side 60c of the rear plate 60, and the upper side 61b of the right plate 61. A connecting plate 66c is provided at the lower edge of the front plate of the upper cover 66. The connecting plate 66c is connected to the ceiling 46.

[0075] As shown in Fig. 4, a plurality of first female screw holes 66a arranged side by side left and right and a plurality of second female screw holes 66b arranged side by side left and right are provided on the front plate of the upper cover 66. The first female screw holes 66a are located above the second female screw holes 66b. In Fig. 4, one first female screw hole 66a and one second female screw hole 66b are shown respectively. Insert bolts into the two insertion holes 54f of the inner cover 51 from the rear side and connect them to the two second female screw holes 66b.

[0076] FIG. 34 is a partially enlarged plan view showing the wiring 69 provided between the terminal block 67 and the control device 35. The terminal block 67 is provided at the left front portion of the ceiling 46. The cover 50 includes a ceiling cover 68. The ceiling cover 68 is provided above the inner cover 51 and the outer cover 57. The ceiling cover 68 is provided around the second magazine 8 in the front, rear, left, and right directions. The wiring 69 is provided between the terminal block 67 and the control device 35. The wiring 69 is arranged on the ceiling cover 68 so as to pass through the front side and the right side of the second magazine 8. In the second magazine 8, tools are stored such that the cutting edges face the opposite side of the column 4, that is, the left side. The wiring 69 is arranged on the right side of the second magazine 8, that is, between the column 4 and the second magazine 8. That is, the wiring 69 is arranged on the side opposite to the cutting edge of the tool. Therefore, it is possible to prevent the wiring 69 from coming into contact with the cutting edge of the tool.

[0077] FIG. 35 is a partially enlarged perspective view for explaining the conveyance of the tool between the second magazine 8 and the first magazine 6. As shown in FIG. 35, the shutter 52a is moved by the drive unit 52b to open the opening 52e. The conveyance device 9 conveys the tool stored in the second magazine 8 to the first magazine 6 through the opening 52e, or conveys the tool stored in the first magazine 6 to the second magazine 8 through the opening 52e.

[0078] For example, when the shutter 52a is opened to convey the tool, the cutting fluid adhering to the tool during machining may enter the cover 50. As shown by the arrow 71 in FIG. 13, the cutting fluid that has reached the bottom plate 56 of the cover 50 from the tool moves toward the left rear wall 45 and exits the cover 50 through the gap 49. Also, as shown by the arrow 72 in FIG. 13, the cutting fluid that has reached the bottom plate 64 of the cover 50 from the tool moves toward the left rear wall 45 and exits the cover 50 through the gap 49. Since the sealing member 70 is provided between the outer cover 57 and the left rear wall 45, leakage of the cutting fluid from between the outer cover 57 and the left rear wall 45 is suppressed.

[0079] The periphery of the second magazine 7 is also covered by the cover 80. Except for being symmetric about the left and right, the cover 80 has the same configuration as the cover 50, so a detailed description thereof is omitted.

[0080] (Modification Example 1) FIG. 36 is a perspective view of the outer cover 57A of the machine tool according to Modification Example 1 in which the configuration is partially changed, and FIG. 37 is a left side view of the machine tool according to Modification Example 1. The outer cover 57A in Modification Example 1 is partially different in configuration from the above-described outer cover 57, but the inner cover 51 is the same as the above-described inner cover 51. As shown in FIG. 37, in Modification Example 1, the vertical dimension of the height adjustment portion 4a1 is short. That is, the second magazine 8 according to Modification Example 1 is located lower than in the above-described embodiment. Therefore, the upper left plate 54 is located lower than in the above-described embodiment. That is, bolts are inserted into the two insertion holes 54f of the inner cover 51 from the rear side and connected to the two second female screw holes 66b below the first female screw hole 66a of the upper cover 66. That is, the upper cover 66 can be installed at a position corresponding to the vertical position of the second magazine 8.

[0081] As shown in FIG. 36, the outer cover 57A according to Modification Example 1 has a shorter lower portion of the front plate 58A than the outer cover 57. The front plate 58A is provided with the same connecting member 58a as the above-described connecting member 58a. The front plate 58A, particularly the portion below the second lower side of the front plate 58A, corresponds to the mounting portion.

[0082] (Modification Example 2) FIG. 38 is a perspective view of the outer cover 57B of the machine tool according to Modification Example 2 in which the configuration is partially changed, and FIG. 39 is a left side view of the machine tool according to Modification Example 2. The outer cover 57B in Modification Example 2 is partially different in configuration from the above-described outer covers 57 and 57A, but the inner cover 51 is the same as the above-described inner cover 51. As shown in FIG. 38, in Modification Example 2, the vertical dimension of the height adjustment portion 4a2 is shorter than that of the height adjustment portion 4a1. That is, the second magazines 7 and 8 according to Modification Example 2 are located lower than in Modification Example 1. In Modification Example 2, the upper cover 66 is not attached.

[0083] As shown in FIG. 39, the outer cover 57B according to the second modification has a shorter lower portion of the front plate 58B than the outer cover 57A. In the second modification, the connecting member 58a is deleted. Even if the connecting member 58a is deleted, the inner cover 51 is fixed to the left rear wall 45 and the second support portion 30 so that a gap 49 is formed between the inner cover 51 and the left rear wall 45. The front plate 58B, particularly the portion below the second lower side of the front plate 58B, corresponds to the mounting portion.

[0084] In the above-described machine tool, since the cutting fluid that has entered the cover 50 moves from the bottom plates 56 and 64 of the cover 50 toward the machining chamber 40, it is easy to return the cutting fluid to the machining chamber 40. The cutting fluid on the bottom plate 56 moves toward the machining chamber 40, the cutting fluid on the bottom plate 64 moves toward the machining chamber 40, and moves through the gap 49 into the machining chamber 40.

[0085] Also, the upper cover 66 can be installed at a position corresponding to the vertical position of the second magazine 8. Also, through the window 59a, the tools stored in the second magazine 8 can be confirmed. Also, an outer cover 57 having a mounting portion corresponding to the vertical position of the second magazine 8 can be used. Also, the wiring 69 can be arranged on the opposite side of the cutting edge of the tool. Also, the left side surface portion 44a and the lower left plate 55 can be removed to perform maintenance management of the machine tool.

[0086] The embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is intended to include all modifications within the scope of the claims and the scope equivalent to the claims. The matters described in each embodiment can be combined with each other. Also, the independent claims and dependent claims described in the claims can be combined with each other in all possible combinations regardless of the citation form. Furthermore, although the claims use a form (multi-claim form) of describing a claim that cites two or more other claims, it is not limited to this. A form of describing a multi-claim (multi-multi-claim) that cites at least one multi-claim may be used.

Explanation of Reference Numerals

[0087] 2 Work holding parts 6 First magazine 7, 8 Second magazine 40 Processing chamber 44a Left side surface (side surface) 45a Opening 45 Left rear wall 49 Gap 50 Cover 51 Inner cover 55 Lower left plate (second side surface) 56 Bottom plate (first bottom surface) 57 Outer cover 58, 58A, 58B Front plate (mounting part) 59a Window 64 Bottom plate 66 Upper cover 69 Wiring

Claims

1. In a machine tool comprising a magazine for storing tools, a holding part for holding a workpiece, and a processing chamber that surrounds the holding part and where processing is performed by the tools, an opening is formed in the wall of the processing chamber, the magazine is disposed inside and outside the processing chamber through the opening, and the machine tool is provided with a cover that covers the magazine and has a bottom surface that slopes downward toward the wall. Machine tool.

2. The bottom surface of the cover is located inside the processing chamber and includes a first bottom surface that slopes downward toward the wall. The machine tool according to claim 1.

3. A gap is formed between the first bottom surface and the wall. The machine tool according to claim 2.

4. The bottom surface of the cover is located outside the processing chamber and includes a second bottom surface that slopes downward toward the wall. The machine tool according to any one of claims 1 to 3.

5. The cover includes an upper cover that covers the upper side of the magazine and is attached to the wall, and an inner cover that is located inside the processing chamber. The upper cover is configured to be able to change the vertical mounting position with respect to the inner cover. The machine tool according to any one of claims 1 to 3.

6. The cover is located outside the processing chamber and includes an outer cover that is attached to the wall. A window through which the inside of the cover can be visually recognized is provided in the outer cover. The machine tool according to any one of claims 1 to 3.

7. The vertical position of the magazine is selected from a plurality of vertical positions. The outer cover has dimensions corresponding to the selected vertical position of the magazine and includes an attachment portion for attaching to the wall. The machine tool according to claim 6.

8. The machine tool is provided with a column that supports the magazine and a control panel. The processing chamber is disposed on the first surface side of the column. The control panel is disposed on the second surface side located on the opposite side of the first surface of the column. The magazine is disposed on the third surface side that intersects the first surface and the second surface of the column. The tools are stored in the magazine such that the cutting edges face the opposite side of the column. Wiring for connecting the inside of the processing chamber and the control panel is disposed between the magazine and the column on the upper side of the cover. The machine tool according to any one of claims 1 to 3.

9. The processing chamber includes a removable side portion that intersects the wall. The cover includes a removable second side portion that faces the side portion. The machine tool according to any one of claims 1 to 3.

Images