Cutting machine

Abstract

To provide a cutting machine in which cut powder is less likely to spill outside when opening / closing a slide cover.SOLUTION: A cutting machine 100 comprises: a case body 10 in which a first opening 12a is formed in the front of a processing chamber A1 for cutting a work-piece 5; a slide cover 60; and a slide rail 70 which is located on the lateral side of the first opening 12a, and with which the slide cover 60 engages. The slide rail 70 extends in a Z-axis direction from the front and bottom to the rear and top. Therefore, when the slide cover 60 moves backward along the Z-axis, the first opening 12a opens. At this time, cut powder CP adhered the rear face of the slide cover 60 drops into the processing chamber A1 from the first opening 12a. Further, the slide rail 70 is located on the lateral side of the first opening 12a, and the cut powder CP is not adhered thereto. Accordingly, the cut powder is less likely to spill the outside of the cutting machine 100.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a cutting machine.

Background Art

[0002] Conventionally, a cutting machine for producing, for example, dental molded products by cutting a workpiece by bringing a machining tool into contact with the workpiece is known. In such a cutting machine, cutting powder is generated when cutting is performed. In order to prevent the cutting powder from spilling outside the cutting machine, the machining tool is covered with a front cover (slide cover) or the like. For example, Patent Document 1 discloses a cutting machine including a machining tool and a front cover. The machining tool is housed in an internal space partitioned by a wall portion of the cutting machine and the front cover. In such a cutting machine, cutting powder is generated when cutting is performed, but the front cover suppresses the cutting powder from spilling outside during cutting.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, cutting powder gradually accumulates on the inner space side of the front cover. Further, for example, when a slide rail for sliding the front cover is attached, cutting powder also accumulates on the slide rail. When a relatively large amount of cutting powder accumulates on the front cover or the slide rail, there is a possibility that the cutting powder spills outside the cutting machine when the operator opens the front cover to take out the workpiece.

[0005] The present invention has been made in view of such a point, and an object thereof is to provide a cutting machine in which cutting powder is less likely to spill outside when the slide cover is opened and closed.

Means for Solving the Problems

[0006] The cutting machine according to the present invention includes a case body having a processing chamber for cutting an object to be cut formed therein, an opening formed in front of the processing chamber, a slide cover provided in front of the case body and capable of opening and closing the opening, and a slide rail provided on the case body, engaged with the slide cover, and extending from the front and downward directions to the rear and upward directions. The opening opens when the slide cover moves rearward and upward.

[0007] According to the cutting machine of the present invention, when the object to be cut is processed in the processing chamber, cutting powder adheres to the processing chamber side of the slide cover. The slide cover is engaged with a slide rail extending from the front and downward to the rear and upward, and is movable along the slide rail. When the slide cover moves rearward and upward, the opening opens. The slide cover is provided in front of the opening. Therefore, even if the cutting powder adheres to the slide cover, the cutting powder that falls from the slide cover when the slide cover is opened and closed falls into the processing chamber from the opening. Further, the slide rail is disposed on the side of the opening. Therefore, even if the cutting powder scatters in front of the opening, adhesion of the cutting powder to the slide rail is suppressed. Thereby, spilling of the cutting powder to the outside of the cutting machine is suppressed.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a cutting machine in which cutting powder is less likely to spill outside when the slide cover is opened and closed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0010] Hereinafter, with reference to the drawings, embodiments of a cutting machine according to an embodiment of the present invention will be described. Note that the embodiments described here are not intended to particularly limit the present invention. Also, members and parts having the same function are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified as appropriate.

[0011] FIG. 1 is a perspective view showing a cutting machine 100 according to the present embodiment. FIG. 2 is a longitudinal sectional view of the cutting machine 100 as viewed from the left. FIG. 3 is a longitudinal sectional view of the cutting machine 100 as viewed from the right. FIG. 4 is a perspective view showing the cutting machine 100 when the slide cover 60 is opened. In the drawings, the reference signs F, Rr, L, R, U, and D respectively mean the front, rear, left, right, top, and bottom of the cutting machine 100. However, these directions are defined for convenience of explanation and do not limit the installation mode of the cutting machine 100, nor do they limit the present invention.

[0012] In the present embodiment, the cutting machine 100 produces an object by cutting a workpiece 5 (see FIG. 5). Here, the type of the object is not particularly limited, but for example, it is a dental prosthesis. Examples of dental prostheses include inlays, crowns, bridges, and the like. In the present embodiment, the cutting machine 100 is used in the dental field and produces a dental prosthesis from the workpiece 5. However, the field in which the cutting machine 100 is used is not limited to the dental field.

[0013] As shown in FIG. 1, the machining tool 100 includes a case body 10. The case body 10 is formed in a box shape and has a space inside. As shown in FIG. 2, inside the case body 10, there are provided a machining chamber A1 in which a workholder 30 for holding a workpiece 5 (see FIG. 5) is accommodated, and an accommodation chamber A2 in which a cutting device 20 is accommodated. The machining chamber A1 is an area for cutting the workpiece 5. The accommodation chamber A2 is located above the machining chamber A1. In front of the machining chamber A1, a first opening 12a (see FIG. 4) to be described later is formed. The machining chamber A1 is connected to the outside of the machining tool 100 through the first opening 12a. Further, as shown in FIG. 3, inside the case body 10, there are provided a drive device chamber A3 in which a holder moving device 40 for moving the workholder 30 and a tool stocker 45 (see FIG. 2) are accommodated, and a tool exchange chamber A4 arranged in front of the accommodation chamber A2. In front of the tool exchange chamber A4, a second opening 12b (see FIG. 4) to be described later is formed. The tool exchange chamber A4 is connected to the outside of the machining tool 100 through the second opening 12b. As shown in FIG. 4, a slide cover 60 is provided on the front surface of the case body 10 so as to be openable and closable. The case body 10 is provided with a slide rail 70 with which the slide cover 60 engages and which extends from the front and downward direction to the rear and upward direction. An operation panel 90 is provided below the slide cover 60. The operation panel 90 is for the user to perform operations related to machining.

[0014] As shown in FIG. 2, the case body 10 has a bottom wall 11, a front wall 12, a left side wall 13 (see FIG. 1), a right side wall 14 (see FIG. 4), a top wall 15, and a rear wall 16. Each member of the case body 10 is formed of a steel plate or the like. The bottom wall 11 extends in the front-rear direction and the left-right direction, and constitutes the bottom surface of the cutting machine 100. The left side wall 13 is connected to the left end of the bottom wall 11. The left side wall 13 extends vertically from the left end of the bottom wall 11. The right side wall 14 is connected to the right end of the bottom wall 11. The right side wall 14 extends vertically from the right end of the bottom wall 11. The rear wall 16 is connected to the rear end of the bottom wall 11. The rear wall 16 extends vertically from the rear end of the bottom wall 11. The left end of the rear wall 16 is connected to the rear end of the left side wall 13. The right end of the rear wall 16 is connected to the rear end of the right side wall 14. The top wall 15 is provided in parallel with the bottom wall 11. The top wall 15 is connected to the upper ends of the left side wall 13, the right side wall 14, and the rear wall 16. The front wall 12 is connected to the front end of the bottom wall 11. The front wall 12 extends upward while inclining rearward from the front end of the bottom wall 11. Hereinafter, the direction in which the front wall 12 extends is also referred to as the Z-axis direction. Also, hereinafter, when there is no particular need to specify, the upper side in the Z-axis direction may be simply referred to as the upper side, and the lower side in the Z-axis direction may be simply referred to as the lower side. The left end of the front wall 12 is connected to the left side wall 13, and the right end of the front wall 12 is connected to the right side wall 14. As shown in FIG. 4, the case body 10 includes a support column portion 10P that extends vertically at a substantially middle position in the left-right direction. The support column portion 10P extends vertically and extends rearward (downward in the X-axis direction described later). However, the support column portion 10P is located in front of the accommodation chamber A2 (see FIG. 2).

[0015] As shown in FIG. 4, a first opening 12a and a second opening 12b are formed in the front wall 12. The first opening 12a is an example of the opening in the present invention. In the present embodiment, the first opening 12a and the second opening 12b have a rectangular shape when viewed from the front. The first opening 12a is formed in front of the processing chamber A1. The second opening 12b is formed in front of the tool exchange chamber A4. The first opening 12a is arranged to the left of the second opening 12b.

[0016] The case body 10 is provided with a dust-proof rubber 18. As shown in FIG. 4, the dust-proof rubber 18 is disposed at the lower end position of the first opening 12a. The dust-proof rubber 18 is a member that prevents the cutting powder generated inside the processing chamber A1 from scattering. The dust-proof rubber 18, together with the fiber member 68 (see FIG. 7) described later, prevents the cutting powder from spilling out from the first opening 12a. In the present embodiment, the dust-proof rubber 18 has a rectangular parallelepiped shape with a length in the left-right direction (Y-axis direction described later) substantially the same as that of the first opening 12a. However, the shape of the dust-proof rubber 18 is not limited thereto. The dust-proof rubber 18 is placed, for example, on a mounting table 18a (see FIG. 10) attached to the processing chamber A1 side of the front wall 12. However, the method of arranging the dust-proof rubber 18 is not limited thereto.

[0017] As shown in FIG. 1, a left inner wall 13a is provided to the right of the left side wall 13. The left inner wall 13a is disposed to the left of the first opening 12a (see FIG. 4). As shown in FIG. 2, the left inner wall 13a includes an upper portion 13aa located in front of the storage chamber A2, and a lower portion 13ab extending downward along the front wall 12 of the case body 10 from the upper portion 13aa. As shown in FIG. 4, a right inner wall 14a is provided to the left of the right side wall 14. The right inner wall 14a is provided to the right of the second opening 12b. That is, the right inner wall 14a is provided to the right of the first opening 12a.

[0018] FIG. 5 is a plan view of the work holder 30. The work holder 30 is a device that holds the workpiece 5. Here, the work holder 30 holds the workpiece 5 via the adapter 6. However, the work holder 30 may directly hold the workpiece 5 without using other members. As shown in FIG. 5, the work holder 30 includes a pair of left and right arms 31, 32. The adapter 6 is held by the work holder 30 by being inserted between the pair of arms 31, 32.

[0019] The workpiece 5 has, for example, a disc shape. The workpiece 5 is formed depending on the type of material such as zirconia, polymethyl methacrylate resin (PMMA), hybrid resin, PEEK (polyether ether ketone resin), and gypsum. When zirconia is used as the type of material of the workpiece 5, for example, semi-sintered zirconia is used. However, the shape and material of the workpiece 5 are not particularly limited.

[0020] The holder moving device 40 supports and moves the workpiece holder 30. In the present embodiment, the holder moving device 40 moves the workpiece holder 30 in the front-rear direction. More specifically, as shown in FIG. 2, the holder moving device 40 moves the workpiece holder 30 in the diagonally front-rear direction. When the workpiece holder 30 is moved forward by the holder moving device 40, it also moves upward. When the workpiece holder 30 is moved backward by the holder moving device 40, it also moves downward. Hereinafter, the direction in which the workpiece holder 30 is moved by the holder moving device 40 is also referred to as the X-axis direction. Further, hereinafter, when there is no particular need to specify, the front in the X-axis direction may be simply referred to as the front, and the rear in the X-axis direction may be simply referred to as the rear. Further, as shown in FIG. 5, the holder moving device 40 is connected to a rotating device 50 described later.

[0021] The holder moving device 40 includes a support arm 41 that extends in the left-right direction and supports the workpiece holder 30. As shown in FIG. 3, the holder moving device 40 includes an X-axis direction moving body 42 connected to the support arm 41, a pair of X-axis guide rails 43, and an X-axis direction drive motor 44. The holder moving device 40 moves the workpiece holder 30 in the X-axis direction by moving the support arm 41 in the X-axis direction. Here, a part of the X-axis direction moving body 42, the pair of X-axis guide rails 43, the X-axis direction drive motor 44, and the support arm 41 of the holder moving device 40 are housed in the drive device chamber A3.

[0022] A pair of X-axis guide rails 43 extends in the X-axis direction. The X-axis direction moving body 42 is slidably engaged with the pair of X-axis guide rails 43. The X-axis direction moving body 42 can move in the X-axis direction along the X-axis guide rails 43. Although illustration is omitted, for example, the X-axis direction moving body 42 is connected to a ball screw. That is, the holder moving device 40 has a ball screw mechanism. The X-axis direction drive motor 44 rotates the ball screw. When the X-axis direction drive motor 44 is driven, the X-axis direction moving body 42 moves in the X-axis direction along the X-axis guide rails 43. Note that the holder moving device 40 is not limited to having a ball screw mechanism, and for example, it may have a timing belt or a wire.

[0023] As shown in FIG. 5, the support arm 41 includes a rotation shaft 41a that rotates around an axis AXb extending in the left-right direction, a first arm 41b that is connected to the rotation shaft 41a so as to be orthogonal to the axis AXb and rotates in the front-rear direction together with the rotation shaft 41a, and a second arm 41c that is connected to the first arm 41b in parallel with the axis AXb (so as to be orthogonal to the first arm 41b). As shown in FIG. 3, a B-axis rotation motor 51B of a B-axis rotation device 50B described later is connected to the X-axis direction moving body 42. By the B-axis rotation motor 51B, the rotation shaft 41a (see FIG. 5) rotates around the axis AXb (see FIG. 5). When the B-axis rotation motor 51B is driven and the rotation shaft 41a rotates, the work holder 30 rotates in the front-rear direction.

[0024] As shown in FIG. 5, the rotating device 50 includes an A-axis rotating device 50A that rotates the workpiece holder 30 in the left-right direction, and a B-axis rotating device 50B (see FIG. 3) that rotates the workpiece holder 30 in the front-rear direction. The A-axis rotating device 50A includes an A-axis rotating motor 51A and a rotating shaft 52A. The A-axis rotating motor 51A is fixed to the second arm 41c. The rotating shaft 52A is connected to the A-axis rotating motor 51A (more specifically, a drive unit including the A-axis rotating motor 51A) and extends in the front-rear direction along the axis AXa. When the A-axis rotating motor 51A is driven, the rotating shaft 52A rotates around the axis AXa. The B-axis rotating device 50B includes a B-axis rotating motor 51B. As described above, the B-axis rotating motor 51B is connected to the X-axis direction moving body 42 and rotates the workpiece holder 30 in the front-rear direction.

[0025] The cutting device 20 shown in FIG. 2 is a device for cutting the workpiece 5. The cutting device 20 cuts the workpiece 5 by bringing the machining tool 8 into contact with the workpiece 5 while rotating the machining tool 8. The cutting device 20 includes a spindle 21, a tool gripping portion 22 that grips the machining tool 8, a spindle rotating device 23 that rotates the spindle 21, and a moving device 24 that can move the spindle 21 in the left-right direction Y and the up-down direction Z. The moving device 24 is composed of a left-right moving device 24Y and an up-down moving device 24Z. When the workpiece 5 is not being cut, the cutting device 20 is arranged in the storage chamber A2.

[0026] The spindle 21 rotates the tool gripping portion 22 and the machining tool 8 gripped by the tool gripping portion 22 about the longitudinal direction as the axis. The spindle 21 extends, for example, in the Z-axis direction. The spindle rotating device 23 is connected to the spindle 21. When the spindle rotating device 23 is driven, the spindle 21 rotates around the central axis extending in the up-down direction Z. The configuration of the spindle rotating device 23 is not particularly limited, and may be, for example, an electric motor.

[0027] The tool gripping part 22 grips the machining tool 8 and is provided on the spindle 21. The cutting machine 100 is pre-provided with a plurality of machining tools 8 having different diameters and tool part shapes. The plurality of machining tools 8 are accommodated in a tool stocker 45 described later. The tool gripping part 22 selectively grips one of the plurality of machining tools 8. When the spindle 21 rotates around the central axis extending in the vertical direction, the tool gripping part 22 and the machining tool 8 gripped by the tool gripping part 22 rotate around the central axis of the machining tool 8.

[0028] As shown in FIG. 2, the cutting device 20 is provided with an air blow device 28. The air blow device 28 is provided on the side of the spindle 21. The air blow device 28 injects air in the Z-axis direction from the lower end of the air blow device 28. The supply source of the air injected by the air blow device 28 is not particularly limited. For example, it may be a compressor or the like installed outside the cutting machine 100. By injecting air by the air blow device 28 during the cutting of the workpiece 5, the cutting powder generated when cutting the workpiece 5 can be blown away. Further, cutting heat is generated during cutting, but since the air blow device 28 injects air toward the workpiece 5 and the machining tool 8, the workpiece 5 and the machining tool 8 can be cooled.

[0029] The moving device 24 is a device that moves the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 in the Z-axis direction and the left-right direction. Here, the left-right direction is the direction orthogonal to the X-axis direction and the Z-axis direction. Hereinafter, the left-right direction is also referred to as the Y-axis direction. The moving device 24 is provided above the workpiece holder 30. When the moving device 24 moves the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 in the Y-axis direction and the Z-axis direction, and the holder moving device 40 moves the workpiece holder 30 in the X-axis direction, the positional relationship between the machining tool 8 and the workpiece 5 changes three-dimensionally. The spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 appear in the machining chamber A1 or retract to the storage chamber A2 by moving in the Z-axis direction. Here, the machining chamber A1 and the storage chamber A2 communicate with each other through the opening A1U. The opening A1U has a size that allows the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 to pass through. When performing cutting on the workpiece 5, the moving device 24 moves the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 to the machining chamber A1.

[0030] The moving device 24 includes a left-right moving device 24Y and an up-down moving device 24Z. When the left-right moving device 24Y is driven, the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 move in the Y-axis direction. When the up-down moving device 24Z is driven, the spindle 21, the tool gripping part 22, the spindle rotating device 23, and the air blow device 28 move in the Z-axis direction. The configuration of the moving device 24 is not particularly limited. For example, the left-right moving device 24Y may be composed of a guide rail extending in the Y-axis direction, a left-right moving body slidably engaged with the guide rail, a ball screw connected to the left-right moving body, an electric motor for rotating the ball screw, and the like. Also, the up-down moving device 24Z may be a mechanism having a ball screw, for example, in the same manner as the left-right moving device 24Y.

[0031] As shown in FIG. 2, an exhaust duct 80 is provided at the rear and lower part of the case body 10. The exhaust duct 80 extends from the processing chamber A1 inside the case body 10 to the outside of the case body 10. A dust collector 85 is installed outside the case body 10. The dust collector 85 is connected to the end of the exhaust duct 80 on the outside of the case body 10. The configuration of the dust collector 85 is not particularly limited. For example, it has a configuration with a fan. When the fan rotates, the dust collector 85 can suck the cutting powder together with the air inside the processing chamber A1 through the exhaust duct 80.

[0032] The tool stocker 45 is housed in the drive device chamber A3 (see FIG. 3). As shown in FIG. 2, the tool stocker 45 is a box-shaped member capable of storing a plurality of processing tools 8 formed in a rod shape. The plurality of processing tools 8 are used appropriately according to, for example, the material of the workpiece 5 and the type of cutting. The tool stocker 45 is supported by an X-axis direction moving body 42 (see FIG. 3). Specifically, the tool stocker 45 is fixed to the upper surface of the X-axis direction moving body 42.

[0033] The holder moving device 40 is configured to be able to move the tool stocker 45 to the tool gripping position P1 located below the opening A1U. To have the tool gripping portion 22 grip the processing tool 8, first, the tool stocker 45 is moved to the tool gripping position P1. Next, the tool gripping portion 22 is moved to a position above the tool gripping position P1. In this state, the vertical movement device 24Z is driven to lower the tool gripping portion 22. By doing this, the tool gripping portion 22 can grip the processing tool 8 of the tool stocker 45.

[0034] The holder moving device 40 is configured to be able to move the tool stocker 45 to a tool exchange position P2 set in front of the tool gripping position P1. The tool exchange position P2 is set below the tool exchange chamber A4 (see FIG. 3). As shown in FIG. 3, an opening A4d is formed in the bottom wall A4D of the tool exchange chamber A4, which is located above the tool exchange position P2 (see FIG. 2) and opens in the Z-axis direction. The opening A4d is for the user to insert and remove the machining tool 8 into and from the tool stocker 45. When the holder moving device 40 is driven to move the tool stocker 45 to the tool exchange position P2, the user can access the tool stocker 45 from the tool exchange chamber A4 through the opening A4d. By providing the tool exchange chamber A4 with the opening A4d, it is prevented that the user touches the holder moving device 40 during the replacement of the machining tool 8 or the like. Also, with such a configuration, it is suppressed that foreign matter from the outside enters the drive device chamber A3 during the replacement of the machining tool 8 or the like.

[0035] FIG. 6 is an enlarged view of the vicinity of the left inner wall 13a in FIG. 2. As shown in FIG. 6, a slide rail 70 is attached to the front end of the left inner wall 13a. The slide rail 70 extends in the Z-axis direction. The slide rail 70 is attached to the left inner wall 13a by, for example, screws. The slide rail 70 is a member with which the slide cover 60 engages. As shown in FIG. 4, the slide rail 70 is also attached to the right inner wall 14a. The slide rail 70 attached to the right inner wall 14a is the same as the slide rail 70 attached to the left inner wall 13a, except that they are symmetric about the left and right.

[0036] A constant load spring 78 is provided on the left inner wall 13a. The constant load spring 78 is a spring that applies a constant load to the part to be biased 73. In the present embodiment, the constant load spring 78 is a torsion spring. The constant load spring 78 includes a spring part 78a, a drum part 78b around which the spring part 78a is wound, and a sub-plate 78c located at the lower end of the spring part 78a. A part of the spring part 78a extends in the Z-axis direction, and the other part is wound around the drum part 78b. The sub-plate 78c is attached to the fixing part 73a of the part to be biased 73. The sub-plate 78c and the fixing part 73a are fixed to each other by, for example, screws. When the slide cover 60 moves along the Z-axis direction, the constant load spring 78 applies a biasing force to the slide cover 60 upward in the Z-axis direction via the part to be biased 73. The biasing force is constant regardless of the length of the spring part 78a pulled out from the drum part 78b. For example, the biasing force balances the force due to the weight of the slide cover 60 in the Z-axis direction. Therefore, when the user moves the slide cover 60 upward and releases the hand from the slide cover 60, the slide cover 60 does not move in the Z-axis direction. However, the magnitude of the biasing force is not particularly limited. When the slide cover 60 moves up and down in the Z-axis direction, a part of the spring part 78a is wound around the drum part 78b or pulled out.

[0037] A lock portion 79 is provided on the left inner wall 13a. The lock portion 79 is a portion that locks the movement of the slide cover 60 in the Z-axis direction. The lock portion 79 includes a movable member 79a, a magnetic body 79b, a first stopper 79d, and a second stopper 79e. The movable member 79a is connected to the outer rail 72 of the slide rail 70. The movable member 79a has a substantially L-shaped cross section in a side view. The movable member 79a includes an extension portion 79aa that extends rearward from its rear portion. The movable member 79a is attached to the left inner wall 13a and is attached to a shaft (not shown) that rotates in the front-rear direction, and is rotatably attached in the front-rear direction. The magnetic body 79b is a member to which the magnet 73b is attracted when the slide cover 60 moves upward in the Z-axis direction. When the magnet 73b is attracted to the magnetic body 79b, the downward movement of the slide cover 60 in the Z-axis direction is suppressed. The first stopper 79d and the second stopper 79e are portions where the extension portion 79aa abuts. When the extension portion 79aa abuts against the first stopper 79d or the second stopper 79e, the rotation of the movable member 79a is suppressed. Therefore, the movement of the slide cover 60 can be restricted.

[0038] As shown in FIG. 4, the slide cover 60 is provided in front of the case body 10 and is a member that can open and close the first opening 12a and the second opening 12b. The slide cover 60 is engaged with the slide rail 70 and is configured to be movable in the Z-axis direction. That is, the slide cover 60 is configured to be movable in a direction toward the front and downward or in a direction toward the rear and upward. The first opening 12a and the second opening 12b open when the slide cover 60 moves in a direction toward the rear and upward. FIG. 7 is a perspective view of the slide cover 60. FIG. 8 is a rear view of the slide cover 60. The slide cover 60 includes an outer rail 72, an inner rail 71, a biasing portion 73, a panel plate 61, a sheet metal 62, a resin washer 63 (see FIG. 9), a spacer 64, an extension plate 65 (see FIG. 10), a rubber bush 66, a handle portion 67 (see FIG. 9), a fiber member 68, and a frame portion 69 (see FIG. 9).

[0039] As shown in FIG. 7, the outer rail 72 is attached to the rear surface of the panel plate 61. The outer rail 72 has a substantially L shape when viewed from above in the Z-axis direction. The front surface of the outer rail 72 is connected to the rear surface of the panel plate 61. The outer rails 72 are provided at both ends of the panel plate 61 in the Y-axis direction, respectively.

[0040] As shown in FIG. 6, the inner rail 71 is movably engaged with the slide rail 70 in the Z-axis direction. Between the inner rail 71 and the slide rail 70, steel balls (not shown) for receiving the load when the inner rail 71 slides and retainers (not shown) for holding the steel balls are attached. As shown in FIG. 7, the inner rail 71 is attached to the outer rail 72. More specifically, the inner rail 71 is attached to the right surface of the outer rail 72 arranged on the left among the two juxtaposed outer rails 72 and the left surface of the outer rail 72 arranged on the right among the two juxtaposed outer rails 72, respectively. The inner rail 71 and the outer rail 72 are fixed by, for example, screws. Therefore, when the inner rail 71 moves in the Z-axis direction with respect to the slide rail 70 (see FIG. 6), the slide cover 60 moves in the Z-axis direction. At this time, the first opening 12a and the second opening 12b are opened and closed.

[0041] As shown in FIG. 6, the biased portion 73 is attached near the lower end of the outer rail 72. The biased portion 73 is a portion that transmits the biasing force by a constant load spring 78 described later to the slide cover 60. In the present embodiment, a constant biasing force is applied to the slide cover 60 upward in the Z-axis direction via the biased portion 73 and the outer rail 72. The biased portion 73 includes a fixing portion 73a that is fixed to the outer rail 72 and has a substantially L shape, a magnet 73b, and a mounting surface 73c that is fixed to the outer rail 72 and on which the magnet 73b is placed. Details will be described later, but the biased portion 73 moves in the Z-axis direction together with the outer rail 72. That is, the magnet 73b moves along the Z-axis direction.

[0042] The panel plate 61 forms the front surface of the slide cover 60 and is a plate-shaped member extending in the Z-axis direction and the Y-axis direction. In the present embodiment, the panel plate 61 is formed of an acrylic resin. However, the material forming the panel plate 61 is not limited to this. As shown in FIG. 8, two window portions 61a are formed in the panel plate 61. The window portions 61a are arranged at positions overlapping the first opening 12a and the second opening 12b, respectively, in the X-axis direction when the slide cover 60 closes the first opening 12a (see FIG. 4) and the second opening 12b (see FIG. 4). Therefore, when the first opening 12a and the second opening 12b are closed, the user can visually recognize the inside of the case body 10 through the window portions 61a. Further, in the present embodiment, a screw hole (not shown) for attaching the screw 63a is formed at a position aligned with the screw 63a (see FIG. 9) in the X-axis direction in the panel plate 61.

[0043] The sheet metal 62 is provided behind the panel plate 61. The sheet metal 62 is an example of a metal reinforcing member in the present invention. In the present embodiment, the sheet metal 62 is provided at the upper end portion, the lower end portion, the left end portion, and the right end portion of the panel plate 61 and at positions facing the support portion 10P (see FIG. 4). The position facing the support portion 10P is a substantially intermediate position in the Y-axis direction in the panel plate 61. However, the position where the sheet metal 62 is attached is not limited to this. Further, in the present embodiment, the outer rail 72 of the slide rail 70 is attached to the sheet metal 62. Further, in the present embodiment, a hole (not shown) through which the screw 63a is inserted is formed at a position aligned with the screw 63a (described later) in the X-axis direction.

[0044] FIG. 9 is a cross-sectional view of the A-A cross-section in FIG. 8. The resin washer 63 is disposed between the panel plate 61 and the sheet metal 62 in the X-axis direction. In the present embodiment, with the resin washer 63 disposed between the panel plate 61 and the sheet metal 62, the panel plate 61 and the sheet metal 62 are attached via the resin washer 63 by fastening the screw 63a to the panel plate 61, the sheet metal 62, and the resin washer 63.

[0045] The spacer 64 is a member provided on the rear surface of the slide cover 60 and extending toward the support column portion 10P. In the present embodiment, the spacer 64 is provided at a position of the sheet metal 62 facing the support column portion 10P. Further, in the present embodiment, two spacers 64 are provided side by side in the Z-axis direction. As shown in FIG. 9, the length of the spacer 64 in the X-axis direction is shorter than the interval in the X-axis direction between the sheet metal 62 and the support column portion 10P. The attachment method of the spacer 64 is not particularly limited, but in the present embodiment, it is attached to the sheet metal 62 by caulking.

[0046] FIG. 10 is a cross-sectional view of the B-B cross-section in FIG. 8. An extension plate 65 is attached to the rear surface of the sheet metal 62. As shown in FIG. 10, the extension plate 65 has a substantially U-shaped in side view. The extension plate 65 includes an extension portion 65a. The extension portion 65a forms the upper end of the extension plate 65 in the Z-axis direction. The extension portion 65a is a portion extending rearward from the rear surface of the slide cover 60. In the present embodiment, the extension portion 65a extends rearward from the rear surface of the sheet metal 62. Further, in the present embodiment, a part of the extension portion 65a extends into the processing chamber A1. More specifically, the portion of the extension portion 65a behind the substantially middle position in the X-axis direction is located inside the processing chamber A1. The extension portion 65a is located above the dust-proof rubber 18 and the fiber member 68 in the Z-axis direction.

[0047] As shown in FIG. 9, the rubber bush 66 is disposed at a position of the slide cover 60 facing the support column portion 10P in the X-axis direction. The rubber bush 66 is an example of an elastic member in the present invention. In the present embodiment, the rubber bush 66 is provided on the rear surface of the sheet metal 62. The length of the rubber bush 66 in the X-axis direction is shorter than the interval in the X-axis direction between the sheet metal 62 and the support column portion 10P.

[0048] The handle portion 67 is provided on the front surface of the slide cover 60 and at least partially overlaps with the rubber bush 66 in the X-axis direction. The handle portion 67 is the part that the user grasps when opening and closing the slide cover 60. In the present embodiment, the handle portion 67 is attached to the front surface of the panel plate 61. Further, in the present embodiment, the center position of the handle portion 67 in the Z-axis direction and the center position of the rubber bush 66 in the Z-axis direction are arranged to be aligned in the X-axis direction. The handle portion 67 has a substantially U-shaped cross-section in side view. The handle portion 67 extends in the Y-axis direction as shown in FIG. 1. In the present embodiment, the center of the handle portion 67 in the Y-axis direction is arranged at a position aligned with the center of the panel plate 61 in the Y-axis direction.

[0049] The fiber member 68 shown in FIG. 8 is provided in the slide cover 60 and is a member having a plurality of fibers. In the present embodiment, the fiber member 68 is attached to the rear surface of the sheet metal 62. The material forming the fiber member 68 is not particularly limited, but in the present embodiment, the fiber member 68 is formed of mohair. In the present embodiment, the fiber member 68 includes a first portion 68a, a second portion 68b, a third portion 68c, and a fourth portion 68d. The first portion 68a is arranged along the Y-axis direction above the window portion 61a. The second portion 68b is arranged along the Z-axis direction to the left of the window portion 61a. The third portion 68c is arranged along the Z-axis direction to the right of the window portion 61a. The fourth portion 68d is arranged along the Y-axis direction below the window portion 61a. By the first portion 68a to the fourth portion 68d, the fiber member 68 has a rectangular shape. As shown in FIG. 10, the fourth portion 68d of the fiber member 68 is arranged in front of the dust rubber 18 in the X-axis direction. The fourth portion 68d is attached to the extension plate 65 at a position below the extension portion 65a. As shown in FIG. 10, the fiber member 68 is arranged at a position aligned with the dust rubber 18 in the X-axis direction when the slide cover 60 closes the first opening 12a. However, the fiber member 68 may be arranged at a position where a part thereof is aligned with the dust rubber 18 in the X-axis direction when the slide cover 60 closes the first opening 12a. In the present embodiment, the slide cover 60 includes the fiber member 68, but is not limited thereto. The slide cover 60 may include the dust rubber 18, and the fiber member 68 may be arranged at the position of the lower end of the first opening 12a.

[0050] The frame portion 69 is a frame surrounding the end portions of the panel plate 61 and the sheet metal 62 in the Y-axis direction and the Z-axis direction. The panel plate 61 and the sheet metal 62 are fixed to the frame portion 69.

[0051] The configuration of the cutting machine 100 according to the present embodiment has been described above. Next, the operation when opening the slide cover 60 will be described. In the following description, it is assumed that the workpiece 5 has been machined in the machining chamber A1. At this time, as shown in FIG. 10, cutting powder CP scattered when machining the workpiece 5 (see FIG. 5) adheres to the rear surfaces of the panel plate 61 and the sheet metal 62, that is, on the machining chamber A1 side. Further, the cutting powder CP accumulates on the upper surface of the extending portion 65a of the extending plate 65.

[0052] From the state shown in FIG. 10, when the user grasps the handle portion 67 (see FIG. 7) and pulls up the slide cover 60 upward in the Z-axis direction, the outer rail 72 (see FIG. 6) moves upward in the Z-axis direction along the inner rail 71 (see FIG. 6). Accordingly, the slide cover 60 attached to the outer rail 72 moves upward together with the outer rail 72. When the slide cover 60 moves upward in the Z-axis direction, the first opening 12a and the second opening 12b (see FIG. 4) open. That is, when the slide cover 60 moves rearward and upward, the first opening 12a and the second opening 12b open. FIG. 11 is a cross-sectional view of the vicinity of the slide cover 60 when the first opening 12a is open. At this time, the cutting powder CP adhering to the rear surfaces of the panel plate 61 and the sheet metal 62 falls. When the slide cover 60 is positioned in front of the first opening 12a and the first opening 12a opens, since the slide cover 60 moves rearward and upward, the fallen cutting powder CP passes through the first opening 12a and falls into the machining chamber A1. Alternatively, the fallen cutting powder CP falls onto the upper surface of the extending portion 65a, advances rearward on the extending portion 65a, and falls into the machining chamber A1. The cutting powder CP that had accumulated on the extending portion 65a before the first opening 12a opened also advances rearward on the extending portion 65a and falls into the machining chamber A1.

[0053] FIG. 12 is a view showing the vicinity of the left inner wall 13a when the slide cover 60 is moved to the uppermost position. As shown in FIG. 12, the magnet 73b of the biasing portion 73 is attracted to the magnetic body 79b of the locking portion 79. At this time, even if the user releases the hand from the handle portion 67, the slide cover 60 does not move downward, and the first opening 12a and the second opening 12b are maintained open. Thereby, the user can open the first opening 12a and the second opening 12b.

[0054] As described above, according to the cutting machine 100 of the present embodiment, when the workpiece 5 is machined in the machining chamber A1, the cutting powder CP adheres to the machining chamber A1 side of the slide cover 60. The slide cover 60 is engaged with a slide rail 70 that extends from the front and below toward the rear and above, and is movable along the slide rail 70. When the slide cover 60 moves toward the rear and above, the first opening 12a opens. The slide cover 60 is provided in front of the first opening 12a. Therefore, even if the cutting powder CP adheres to the slide cover 60, the cutting powder CP that falls from the slide cover 60 when the slide cover 60 is opened and closed passes through the first opening 12a and falls into the machining chamber A1. Further, the slide rails 70 are provided on the left and right sides of the first opening 12a, respectively. Therefore, during machining of the workpiece 5, adhesion of the cutting powder CP scattered in front of the first opening 12a to the slide rails 70 is suppressed. Thereby, spillage of the cutting powder CP to the outside of the cutting machine 100 is suppressed.

[0055] According to the cutting machine 100 of the present embodiment, the extension plate 65 attached to the rear surface of the sheet metal 62 includes an extension portion 65a. The extension portion 65a extends rearward from the rear surface of the slide cover 60. Therefore, a part of the cutting powder CP adhering to the rear surface of the slide cover 60 accumulates on the extension portion 65a. Thereby, spillage of the cutting powder CP along the rear surface of the slide cover 60 to the outside of the cutting machine 100 is suppressed. Therefore, the structure is less likely to spill the cutting powder CP to the outside of the cutting machine 100.

[0056] According to the cutting machine 100 of the present embodiment, the rear part of the extending portion 65a extends to the inside of the processing chamber A1. Therefore, when the cutting powder CP deposited on the extending portion 65a falls from above the extending portion 65a, it falls into the inside of the processing chamber A1. Therefore, the cutting powder CP is less likely to spill outside the cutting machine 100.

[0057] According to the cutting machine 100 of the present embodiment, the slide cover 60 includes a panel plate 61 and a sheet metal 62 provided behind the panel plate 61. Thereby, the rigidity of the slide cover 60 is increased. Therefore, for example, when the user moves the slide cover 60, rattling of the slide cover 60 is suppressed. That is, the opening and closing operation of the slide cover 60 is stabilized.

[0058] According to the cutting machine 100 of the present embodiment, the slide cover 60 includes a resin washer 63 disposed between the panel plate 61 and the sheet metal 62 in the front-rear direction. Therefore, the sheet metal 62 is attached to the panel plate 61 via the resin washer 63. Here, when the sheet metal 62 is directly attached to the rear surface of the panel plate 61, for example, when the ambient temperature changes, the panel plate 61 and / or the sheet metal 62 may be distorted due to the difference in the thermal expansion coefficients of the panel plate 61 and the sheet metal 62. As in the present embodiment, since the slide cover 60 includes the resin washer 63 between the panel plate 61 and the sheet metal 62, when the panel plate 61 and / or the sheet metal 62 thermally expands or contracts, the resin washer 63 deforms. Therefore, the resin washer 63 absorbs the deformation due to the volume change of the panel plate 61 and / or the sheet metal 62. Thus, it is possible to prevent the panel plate 61 and the sheet metal 62 from being distorted.

[0059] According to the cutting machine 100 of the present embodiment, the slide cover 60 includes a fiber member 68. Further, the case body 10 includes a dust-proof rubber 18 at the position of the lower end of the first opening 12a. When the first opening 12a is closed by the slide cover 60, at least a part of the dust-proof rubber 18 and the fiber member 68 are arranged adjacent to each other in the X-axis direction. Since at least a part of the dust-proof rubber 18 and the fiber member 68 are adjacent to each other in the front-rear direction, even if the cutting powder CP spills from the first opening 12a, the cutting powder CP adheres to the dust-proof rubber 18 or the fiber member 68. Therefore, spilling of the cutting powder CP is suppressed. Further, when the slide cover 60 opens and closes, the fiber member 68 moves while contacting the dust-proof rubber 18. Here, if the fiber member 68 is, for example, a dust-proof rubber, the dust-proof rubber moves while contacting the dust-proof rubber 18. At this time, the frictional force generated between the dust-proof rubber and the dust-proof rubber 18 is relatively large, and the movement of the slide cover 60 is hindered. However, in the present embodiment, since the slide cover 60 includes the fiber member 68 having a plurality of fibers, the frictional force generated between the dust-proof rubber 18 and the fiber member 68 is relatively small. Therefore, the movement of the slide cover 60 is less likely to be hindered. Thus, the cutting machine 100 of the present embodiment has a structure in which spilling of the cutting powder CP is suppressed by the fiber member 68 and the dust-proof rubber 18, and the movement of the slide cover 60 is less likely to be hindered.

[0060] According to the cutting machine 100 of the present embodiment, the case body 10 includes a support column portion 10P extending in the vertical direction. A spacer 64 extending toward the support column portion 10P is provided on the rear surface of the sheet metal 62 of the slide cover 60. Thereby, for example, even if the slide cover 60 is pushed relatively strongly backward, the deflection of the slide cover 60 can be suppressed to a certain amount or less. That is, breakage of the slide cover 60 can be prevented.

[0061] According to the cutting machine 100 of the present embodiment, the case body 10 includes a support column portion 10P extending in the vertical direction. Further, the slide cover 60 includes a rubber bush 66 at a position facing the support column portion 10P. The slide cover 60 also includes a handle portion 67 provided on the front surface of the slide cover 60 and at least partially overlapping the rubber bush 66 in the front-rear direction. When a user grasps the handle portion 67 and moves the slide cover 60, if a relatively strong force is applied toward the rear, the slide cover 60 may be damaged. By providing the handle portion 67 and the rubber bush 66 as in the present embodiment, damage to the slide cover 60 during movement of the slide cover 60 is suppressed. Further, when a force is applied to the rear of the slide cover 60 and the slide cover 60 bends, the amount of bending is maximized when the force is applied to the position of the center of the slide cover 60 in the Y-axis direction. That is, when the handle portion 67 is disposed at the center of the slide cover 60 in the Y-axis direction, the slide cover 60 is likely to be damaged. By providing the rubber bush 66 as in the present embodiment, it becomes possible to provide the handle portion 67 at the center of the slide cover 60 in the Y-axis direction.

[0062] The preferred embodiments of the present invention have been described above. However, the above-described embodiments are merely examples, and the present invention can be implemented in various forms.

Explanation of Reference Numerals

[0063] 5 Workpiece 10 Case body 12a First opening (opening) 60 Slide cover 70 Slide rail 100 Cutting machine A1 Processing chamber

Claims

1. A case body having a machining chamber for machining a workpiece therein, and an opening formed in front of the machining chamber; A slide cover provided in front of the case body and capable of opening and closing the opening; A slide rail provided on a side of the opening in the case body, engaged with the slide cover, and extending from a front and lower direction to a rear and upper direction; and The opening opens when the slide cover moves rearward and upward, a cutting machine.

2. The cutting machine according to claim 1, wherein the slide cover includes an extension portion extending rearward from a rear surface of the slide cover.

3. The cutting machine according to claim 2, wherein a part of the extension portion extends into the machining chamber.

4. The slide cover, A panel plate; and A metal reinforcing member provided behind the panel plate, the cutting machine according to claim 1.

5. The cutting machine according to claim 4, wherein the slide cover includes a resin washer disposed between the panel plate and the metal reinforcing member in a front-rear direction.

6. The slide cover includes either a fiber member having a plurality of fibers or a dust-proof rubber for preventing scattering of cutting powder, The case body includes the other of the fiber member and the dust-proof rubber at a position of a lower end of the opening, The cutting machine according to claim 1, wherein at least a part of the fiber member and the dust-proof rubber are disposed adjacent to each other in a front-rear direction when the opening is closed by the slide cover.

7. The case body includes a support portion extending in a vertical direction, The cutting machine according to claim 1, wherein the slide cover includes a spacer provided on a rear surface of the slide cover and extending toward the support portion.

8. The case body includes a support portion extending in a vertical direction, The slide cover, An elastic member provided at a position facing the support portion in a front-rear direction; and A handle portion provided on a front surface of the slide cover and at least partially overlapping the elastic member in a front-rear direction, the cutting machine according to claim 1.

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