Lock mechanism and cutting machine including the same

Abstract

To provide a lock mechanism which can be relatively easily unlocked.SOLUTION: A movable member 79a provided in a lock mechanism 80 is configured to be movable between a first position S1 and a second position S2. When the movable member 79a is at the first position S1, a magnet 73b provided in a slide cover 60 is attracted to a magnetic body 79b and slide of the slide cover 60 is locked. When the slide cover 60 is moved upward, the movable member 79a moves to the second position S2. In this state, attraction between the magnet 73b and the magnetic body 79b is released by forcibly moving the slide cover 60 downward. Namely, the slide of the slide cover 60 can be unlocked. Therefore, the lock mechanism 80 can be relatively easily unlocked.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a locking mechanism and a cutting machine equipped with the same.

Background Art

[0002] Conventionally, a cutting machine that performs cutting by bringing a processing tool into contact with an object to be cut is known. The cutting machine is provided with a cover or the like to prevent scattering of cutting powder. As such a cutting machine, for example, a cutting machine for creating a dental molded product is known. For example, Patent Document 1 discloses a cutting machine including a case body having an opening at the front, a processing tool, a front upper cover, and a support arm for supporting the front upper cover. The opening communicates the inside and the outside of the cutting machine. One end of the support arm is attached to the case body. In such a cutting machine, for example, the support arm is connected to a motor or the like, and when the motor is driven, the support arm moves in the vertical direction. As a result, the front upper cover supported by the support arm moves in the vertical direction, and the opening of the case body is opened and closed. The motor is connected to a control device. By opening and closing the opening of the case body, scattering of cutting powder is prevented and access to the inside of the cutting machine by the user is made possible.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, for example, when preparing the workpiece inside the machining machine, the opening needs to remain open. For example, since the motor connected to the support arm is in a stopped state, the front upper cover is locked with the opening open. However, when machining the workpiece, it is necessary to close the opening again, and the user needs to unlock the front upper cover and move the front upper cover relatively frequently. That is, the user operates the control device to drive the motor in order to move the front upper cover. Relatively frequently unlocking the front upper cover is a burden on the operator.

[0005] The present invention has been made in view of such points, and an object thereof is to provide a locking mechanism that can be unlocked relatively easily.

Means for Solving the Problems

[0006] The locking mechanism according to the present invention is a locking mechanism that locks the sliding of a slide member that slidably engages with a slide rail extending in a predetermined direction, and is movably provided on a rail support member that supports the slide rail. A movable member, an attached member fixed to the movable member, and an attachment member fixed to the slide member and detachable from the attached member. The attached member is disposed on one side in the predetermined direction with respect to the attachment member. The movable member is configured to be movable between a first position that is a position when the attachment member is attached to the attached member and locks the slide of the slide member to the other side in the predetermined direction, and a second position that is a position when the attached member is located on one side in the predetermined direction rather than the first position.

[0007] According to the locking mechanism of the present invention, the mounting member and the member to be mounted are mounted at the first position. The mounting member is provided on the slide member. Therefore, when the mounting member is mounted on the member to be mounted, the sliding of the slide member is locked. In a state where the slide member is locked, when the slide member is moved to one side in the predetermined direction, the movable member moves to the second position via the mounting member and the member to be mounted. At this time, by moving the slide member toward the other side in the predetermined direction, the slide member can be moved forcefully toward the other side in the predetermined direction. At this time, the mounting member and the member to be mounted can be separated. Therefore, the user can unlock the sliding of the slide member by moving the slide member only in the predetermined direction, and can separate the mounting member and the member to be mounted with a relatively small force. Thereby, the lock of the locking mechanism can be released relatively easily.

Effect of the Invention

[0008] According to the present invention, it is possible to provide a locking mechanism that can be unlocked relatively easily.

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

Embodiments for Carrying Out the Invention

[0010] Hereinafter, with reference to the drawings, embodiments of a locking mechanism and 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 of 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 directions 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 a housing chamber A2 in which a cutting device 20 is accommodated. The machining chamber A1 is an area for cutting the workpiece 5. The housing chamber A2 is located above the machining chamber A1. In front of the machining chamber A1, a first opening 12a (see Fig. 4) described later is formed. The machining chamber A1 communicates with the outside of the machining tool 100 through the first opening 12a. Also, 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 (see Fig. 2) and a tool stocker 45 (see Fig. 2) are accommodated, and a tool change chamber A4 arranged in front of the housing chamber A2. In front of the tool change chamber A4, a second opening 12b (see Fig. 4) described later is formed. The tool change chamber A4 communicates with 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. A slide rail 70 is attached to the case body 10. The slide cover 60 is engaged with the slide rail 70 so as to be movable from the front and downward directions to the rear and upward directions. 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. That is, the Z-axis direction is a direction from the front and below to the rear and above. The Z-axis direction is an example of the vertical direction in the present invention. Note that the vertical direction in the present invention may be a direction perpendicular to the mounting surface of the cutting machine 100. Further, hereinafter, when there is no particular need to specify, the upper side in the Z-axis direction may simply be referred to as the upper side, and the lower side in the Z-axis direction may simply be 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.

[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 change chamber A4. The first opening 12a is disposed to the left of the second opening 12b.

[0016] 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 accommodation 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. Although detailed illustration is omitted, the shape of the right inner wall 14a is symmetrical to the left and right with the shape of the left inner wall 13a. The left inner wall 13a (see FIG. 2) and the right inner wall 14a are members that support the slide rail 70. The left inner wall 13a and the right inner wall 14a are an example of the rail support members in the present invention.

[0017] As shown in FIG. 1, the left inner wall 13a includes a rotation shaft 13ac. The rotation shaft 13ac is attached to the left inner wall 13a and is a member rotatable in the front-rear direction. The rotation shaft 13ac rotatably supports a movable member 79a (see FIG. 6) described later. Therefore, when the rotation shaft 13ac rotates, the movable member 79a is configured to be swingable. When the rotation shaft 13ac rotates, a rotational resistance due to friction is generated between the rotation shaft 13ac and the left inner wall 13a. The rotational resistance is smaller than the adsorption force between a magnet 73b (see FIG. 6) and a magnetic body 79b (see FIG. 6) described later.

[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 disk shape. The workpiece 5 is formed depending on the type of material such as zirconia, polymethyl methacrylate resin (PMMA), hybrid resin, PEEK (polyetheretherketone 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 obliquely 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. Also, 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 rotary shaft 41a that rotates around an axis AXb extending in the left-right direction, a first arm 41b that is connected to the rotary shaft 41a so as to be orthogonal to the axis AXb and rotates in the front-rear direction together with the rotary 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 rotary shaft 41a (see FIG. 5) rotates around the axis AXb (see FIG. 5). When the B-axis rotation motor 51B is driven and the rotary 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 Z-axis direction. 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 accommodation 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 Z-axis direction. The configuration of the spindle rotating device 23 is not particularly limited and may be, for example, an electric motor or the like.

[0027] The tool holding part 22 holds the machining tool 8 and is provided on the spindle 21. The machining center 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 holding part 22 selectively holds one of the plurality of machining tools 8. As the spindle 21 rotates around the central axis extending in the Z-axis direction, the tool holding part 22 and the machining tool 8 held by the tool holding 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 downward in the Z-axis direction from the lower end part 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 machining center 100. By the air blow device 28 injecting air during the cutting of the workpiece 5, the cutting powder generated when cutting the workpiece 5 can be blown away. Also, cutting heat is generated during cutting, but since the air blow device 28 is injecting 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 holding 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 workholder 30. When the moving device 24 moves the spindle 21, the tool holding 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 workholder 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 holding part 22, the spindle rotating device 23, and the air blow device 28 appear in the machining chamber A1 or retract to the accommodation chamber A2 by moving in the Z-axis direction. Here, the machining chamber A1 and the accommodation chamber A2 communicate with each other through the opening A1U. The opening A1U has a size that allows the spindle 21, the tool holding 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 holding 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 holding 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 holding 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, for example, a mechanism having a ball screw similar to the left-right moving device 24Y.

[0031] As shown in FIG. 2, an exhaust duct 95 is provided at the rear and lower part of the case body 10. The exhaust duct 95 extends from the processing chamber A1 inside the case body 10 to the outside of the case body 10. A dust collector 96 is installed outside the case body 10. The dust collector 96 is connected to the end of the exhaust duct 95 on the outside of the case body 10. The configuration of the dust collector 96 is not particularly limited, but for example, it has a configuration with a fan. When the fan rotates, the dust collector 96 can suck the cutting powder together with the air inside the processing chamber A1 through the exhaust duct 95.

[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 selectively, for example, according to 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 cause the tool gripping part 22 to grip the processing tool 8, first, the tool stocker 45 is moved to the tool gripping position P1. Next, the tool gripping part 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 part 22. Thereby, the tool gripping part 22 can grip the processing tool 8 of the tool stocker 45.

[0034] The tool 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 tool 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 tool 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 symmetrical about the left and right.

[0036] The slide cover 60 is a member that slidably engages with the slide rail 70. The slide cover 60 is provided in front of the case body 10 and is attached to open and close the first opening 12a and the second opening 12b. The slide cover 60 is an example of the slide member in this embodiment. The slide cover 60 includes a cover portion 61, a handle portion 67 (see FIG. 4), an outer rail 72, and an inner rail 71. The cover portion 61 is a plate-shaped member extending in the Z-axis direction and the Y-axis direction. The configuration of the cover portion 61 is not particularly limited. For example, it includes a panel plate formed of acrylic or the like and a sheet metal attached behind the panel plate. In this embodiment, as shown in FIG. 4, two window portions 61a are formed in the cover portion 61. The window portions 61a are arranged at positions overlapping the first opening 12a and the second opening 12b in the X-axis direction when the slide cover 60 closes the first opening 12a and the second opening 12b. Therefore, when the slide cover 60 closes the first opening 12a and the second opening 12b, the user can visually recognize the inside of the case body 10 through the window portions 61a. The handle portion 67 is a portion that the user grasps when moving the slide cover 60 in the Z-axis direction.

[0037] FIG. 7 is a perspective view of the slide cover 60. As shown in FIG. 7, the outer rail 72 is attached to the rear surface of the cover portion 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 cover portion 61. The outer rail 72 is provided at both ends of the cover portion 61 in the Y-axis direction, respectively.

[0038] As shown in FIG. 6, the inner rail 71 is engaged with the slide rail 70 so as to be movable 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 a retainer (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 parallel outer rails 72 and the left surface of the outer rail 72 arranged on the right among the two parallel 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 cover portion 61 moves in the Z-axis direction. At this time, the first opening 12a and the second opening 12b are opened and closed.

[0039] As shown in FIG. 6, the cutting machine 100 has a locking mechanism 80. The locking mechanism 80 is a mechanism for locking the slide of the slide cover 60 that is slidably engaged with the slide rail 70 extending in the Z-axis direction. FIG. 8 is a view showing a state in which the slide of the slide cover 60 is locked by the locking mechanism 80. As shown in FIG. 8, the locking mechanism 80 includes a biased portion 73, a constant load spring 78, and an attached portion 79. The biased portion 73 is attached to the outer rail 72. The constant load spring 78 and the attached portion 79 are provided on the left inner wall 13a. In the following description, the locking mechanism 80 provided on the outer rail 72 located on the left among the two outer rails 72 and the left inner wall 13a will be described. However, the locking mechanism 80 is also provided in the same manner on the outer rail 72 located on the right among the two outer rails 72 and the right inner wall 14a. Since these have the same configuration except for being symmetric about the left and right with respect to the following description, the description is omitted here.

[0040] 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 receives the biasing force from a constant load spring 78, which will be described later. In the present embodiment, since the biased portion 73 receives the biasing force upward in the Z-axis direction, the slide cover 60 is biased upward in the Z-axis direction. The biased portion 73 includes a fixing portion 73a, a mounting member 73c, and a magnet 73b.

[0041] As shown in FIG. 8, the fixing portion 73a is a member having a substantially L-shaped configuration in side view. FIG. 9 is a perspective view of the biased portion 73. The fixing portion 73a includes a side portion 73aa having a substantially L-shaped configuration in side view, and a rear surface 73ab that is connected to the front end of the side portion 73aa and is disposed at a position substantially perpendicular to the side portion 73aa.

[0042] A long hole 74a extending in the Z-axis direction is formed in the side portion 73aa. A screw 75a is attached to the long hole 74a. The screw 75a is a screw for attaching the fixing portion 73a and the mounting member 73c to the outer rail 72 (see FIG. 6). By adjusting the position of the screw 75a in the Z-axis direction with respect to the long hole 74a, the position of the biased portion 73 in the Z-axis direction with respect to the outer rail 72 can be adjusted. A screw 75b is attached to the side portion 73aa. Although not shown, a screw hole for attaching the screw 75b is formed in the side portion 73aa. The screw 75b is a screw for fixing the side portion 73aa and the mounting member 73c. In the present embodiment, two long holes 74a, screws 75a, and screws 75b are provided respectively. However, the number of the long holes 74a, screws 75a, and screws 75b is not particularly limited. Also, the positions of the long holes 74a, screws 75a, and screws 75b are not particularly limited.

[0043] The rear surface 73ab is a portion to which a sub-plate 78c (see FIG. 6) of a constant-load spring 78 described later is attached. A screw hole 74b is formed in the rear surface 73ab. The screw hole 74b is a screw hole for attaching a screw (not shown) that fixes the sub-plate 78c and the rear surface 73ab. By attaching the sub-plate 78c to the rear surface 73ab, the biased portion 73 receives a biasing force upward in the Z-axis direction by the constant-load spring 78. In the present embodiment, the side portion 73aa and the rear surface 73ab are integrally formed. However, the side portion 73aa and the rear surface 73ab may be separate bodies.

[0044] The placement member 73c is a member for placing the magnet 73b. In the present embodiment, the placement member 73c has a substantially L-shaped configuration when viewed from the rear. The placement member 73c is disposed to the right of the side portion 73aa. The magnet 73b is placed on the upper surface 73ca of the placement member 73c. The method of placing the magnet 73b on the upper surface 73ca is not particularly limited. For example, since the upper surface 73ca of the placement member 73c is formed of a magnetic material, the magnet 73b is fixed to the upper surface 73ca. In the present embodiment, the upper surface 73ca of the placement member 73c is located above the fixing portion 73a. As described above, the screws 75a and 75b are attached to the placement member 73c. Although not shown, screw holes for attaching the screws 75a and 75b are formed in the placement member 73c. Note that the shape and arrangement of the placement member 73c are not limited to this. Also, the fixing portion 73a and the placement member 73c may be integrally formed.

[0045] The magnet 73b is a member detachable from a magnetic body 79b (see FIG. 6) described later. In the present embodiment, the magnet 73b is placed on a placement member 73c. The placement member 73c is fixed to an outer rail 72 (see FIG. 6) together with the fixing portion 73a as described above. Therefore, in the present embodiment, the magnet 73b is fixed to the slide cover 60 via the fixing portion 73a and the placement member 73c. In the present embodiment, the magnet 73b has a rectangular parallelepiped shape. However, the shape of the magnet 73b is not particularly limited. The magnet 73b has a first adsorption surface 73ba. In the present embodiment, the first adsorption surface 73ba is the upper surface of the magnet 73b. The first adsorption surface 73ba is a surface that adsorbs to a second adsorption surface 79ba (see FIG. 8) of the magnetic body 79b described later. When the first adsorption surface 73ba and the second adsorption surface 79ba adsorb to each other, the magnet 73b and the magnetic body 79b adsorb to each other, and the downward slide of the slide cover 60 in the Z-axis direction is locked.

[0046] As shown in FIG. 8, a constant load spring 78 is provided on the left inner wall 13a. The constant load spring 78 is a member that biases the slide cover 60 upward in the Z-axis direction. In the present embodiment, the constant load spring 78 biases upward in the Z-axis direction with a constant force regardless of the position of the slide cover 60 in the Z-axis direction. In the present embodiment, the constant load spring 78 is a torsion spring. In the present embodiment, the constant load spring 78 biases an energized portion 73 attached to the outer rail 72 of the slide cover 60 upward in the Z-axis direction. Thereby, the constant load spring 78 biases the slide cover 60 upward in the Z-axis direction. The constant load spring 78 includes a spring portion 78a, a drum portion 78b around which the spring portion 78a is wound, and a sub-plate 78c located at the lower end of the spring portion 78a. A part of the spring portion 78a extends in the Z-axis direction, and the other part is wound around the drum portion 78b. The sub-plate 78c is attached to the rear surface 73ab (see FIG. 9) of the above-described energized portion 73. The sub-plate 78c and the rear surface 73ab are fixed by, for example, a screw (not shown). The force with which the constant load spring 78 biases the slide cover 60 is balanced with, for example, 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 portion 78a is wound around the drum portion 78b or pulled out.

[0047] An attachment portion 79 is provided on the left inner wall 13a. The attachment portion 79, together with the magnet 73b of the energized portion 73, is a portion that locks the slide of the slide cover 60. The attachment portion 79 includes a movable member 79a, a magnetic body 79b, a first stopper 79d, and a second stopper 79e.

[0048] The movable member 79a is a member movably provided on the left inner wall 13a that supports the slide rail 70. A magnetic body 79b is attached to the movable member 79a. The movable member 79a is configured to be movable between a first position S1 and a second position S2 (see FIG. 10). As shown in FIG. 8, the first position S1 is a position where the magnet 73b locks the downward slide of the slide cover 60 in the Z-axis direction by attaching to the magnetic body 79b described later. FIG. 10 is a view showing a state where the slide cover 60 further moves upward in the Z-axis direction from the state of FIG. 8. As shown in FIG. 10, the second position S2 is a position when the magnetic body 79b is located on the upper side in the Z-axis direction than the first position S1. In the present embodiment, it is supported by a rotation shaft 13ac that can rotate in the front-rear direction. That is, the movable member 79a is attached to the left inner wall 13a via the rotation shaft 13ac. The movable member 79a swings with the rotation shaft 13ac as a pivot axis and is configured to be movable between the first position S1 (see FIG. 8) and the second position S2. The movable member 79a includes an extension portion 79aa that extends rearward from its rear portion. The extension portion 79aa is disposed between a first stopper 79d and a second stopper 79e described later in the Z-axis direction. Although details will be described later, the extension portion 79aa is a member that abuts on the first stopper 79d or the second stopper 79e.

[0049] The magnetic body 79b is fixed to the movable member 79a. The magnetic body 79b is disposed above the magnet 73b in the Z-axis direction. In the present embodiment, the magnetic body 79b is provided at the front end and upper end positions of the movable member 79a. The material forming the magnetic body 79b is formed of a material attachable to the magnet 73b, for example, formed of sheet metal. Further, the movable member 79a and the magnetic body 79b may be integrally formed or separate bodies. The magnetic body 79b has a second adsorption surface 79ba. When the second adsorption surface 79ba and the first adsorption surface 73ba of the magnet 73b adsorb to each other, the downward slide of the slide cover 60 in the Z-axis direction is locked. In the present embodiment, the second adsorption surface 79ba is the lower surface of the magnetic body 79b. The size and shape of the second adsorption surface 79ba are not particularly limited, but in the present embodiment, the second adsorption surface 79ba has a rectangular shape with an area larger than that of the first adsorption surface 73ba. As shown in FIG. 8, when the movable member 79a is disposed at the first position S1, the first adsorption surface 73ba and the second adsorption surface 79ba overlap in the vertical direction. Note that the first adsorption surface 73ba and the second adsorption surface 79ba may directly adsorb or indirectly adsorb. In the present embodiment, although not shown, a resin sheet is sandwiched between the first adsorption surface 73ba and the second adsorption surface 79ba. The first adsorption surface 73ba and the second adsorption surface 79ba adsorb through the resin sheet. The resin sheet is attached to prevent the magnet 73b from cracking when the first adsorption surface 73ba and the second adsorption surface 79ba adsorb to each other.

[0050] As shown in Fig. 10, the first stopper 79d is a member that contacts the movable member 79a on the lower side in the Z-axis direction of the movable member 79a when the movable member 79a is in the second position S2. In the present embodiment, when the movable member 79a is in the second position S2, the first stopper 79d contacts the lower side of the extending portion 79aa. The first stopper 79d is a member that stops the swinging of the movable member 79a by contacting the extending portion 79aa. In the present embodiment, the first stopper 79d is formed of rubber. The material forming the first stopper 79d is not particularly limited, but it is preferably formed of a material that can absorb the impact when stopping the movement of the movable member 79a, such as rubber.

[0051] As shown in Fig. 8, the second stopper 79e is a member that contacts the movable member 79a on the upper side in the Z-axis direction of the movable member 79a when the movable member 79a is in the first position S1. In the present embodiment, when the movable member 79a is in the first position S1, the second stopper 79e contacts the upper side of the extending portion 79aa. The second stopper 79e is a member that stops the swinging of the movable member 79a by contacting the extending portion 79aa. In the present embodiment, the second stopper 79e is formed of rubber. The material forming the second stopper 79e is not particularly limited, but it is preferably formed of a material that can absorb the impact when stopping the movement of the movable member 79a, such as rubber. The second stopper 79e may be the same member as the first stopper 79d.

[0052] The configuration of the machining machine 100 according to the present embodiment has been described above. Next, the operation of locking the slide of the slide cover 60 and the operation of releasing the lock of the slide of the slide cover 60 will be described.

[0053] As shown in Fig. 1, the first opening 12a (see Fig. 4) and the second opening 12b (see Fig. 4) are closed by the slide cover 60. The user grasps the handle portion 67 and pulls up the slide cover 60 upward in the Z-axis direction. At this time, the inner rail 71 (see Fig. 6) moves upward in the Z-axis direction along the slide rail 70 (see Fig. 6). As a result, the slide cover 60 slides upward in the Z-axis direction. When the slide cover 60 slides upward in the Z-axis direction, the first opening 12a and the second opening 12b open. At this time, the magnet 73b of the biased portion 73 attached to the outer rail 72 shown in Fig. 6 also moves upward along the Z-axis direction. The constant load spring 78 biases the slide cover 60 upward in the Z-axis direction with a constant force. When the magnet 73b moves upward in the Z-axis direction, as shown in Fig. 8, the magnet 73b attracts the magnetic body 79b of the movable member 79a arranged at the first position S1. That is, the first adsorption surface 73ba and the second adsorption surface 79ba adsorb. At this time, the first adsorption surface 73ba and the second adsorption surface 79ba are parallel to each other, and the overlapping portion of the first adsorption surface 73ba and the second adsorption surface 79ba in plan view adsorbs. At this time, the downward slide of the slide cover 60 in the Z-axis direction is locked. Therefore, even if the user releases the hand from the slide cover 60, the slide cover 60 does not slide downward in the Z-axis direction.

[0054] Next, the operation of releasing the lock of the lock mechanism 80 will be described. From the state shown in FIG. 8, the user grasps the handle portion 67 (see FIG. 1) and slides the slide cover 60 upward in the Z-axis direction. That is, the inner rail 71 moves upward along the slide rail 70 in the Z-axis direction. At this time, the magnet 73b of the biasing portion 73 connected to the outer rail 72 pushes up the magnetic body 79b upward in the Z-axis direction. The magnetic body 79b is connected to the movable member 79a and the rotation shaft 13ac. When the magnetic body 79b is pushed upward, the rotation shaft 13ac rotates from the front to the rear. At this time, the movable member 79a connected to the rotation shaft 13ac also swings from the front to the rear. When the movable member 79a swings from the front to the rear, the lower side of the extending portion 79aa of the movable member 79a abuts against the first stopper 79d. At this time, the swinging of the movable member 79a stops, and the sliding of the slide cover 60 also stops. At this time, as shown in FIG. 10, the movable member 79a is disposed at the second position S2. When the movable member 79a moves from the first position S1 (see FIG. 8) to the second position S2 while swinging, a part of the second adsorption surface 79ba is separated from the first adsorption surface 73ba. Therefore, when the movable member 79a is at the second position S2, a part of the first adsorption surface 73ba and a part of the second adsorption surface 79ba are adsorbed. The contact area between the magnet 73b and the magnetic body 79b at this time is smaller than the contact area when the movable member 79a is at the first position S1. Therefore, the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is at the second position S2 is smaller than the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is at the first position S1. Note that the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is at the second position S2 may be 0. That is, when the movable member 79a is at the second position S2, all of the first adsorption surface 73ba and all of the second adsorption surface 79ba may be separated.

[0055] From the state shown in FIG. 10, the user slides the slide cover 60 downward. For example, the user grasps the handle portion 67 (see FIG. 1) and slides the slide cover 60 downward in the Z-axis direction. At this time, the slide cover 60 slides downward in the Z-axis direction with a certain momentum. Note that the constant load spring 78 biases the slide cover 60 upward in the Z-axis direction with a constant force. FIG. 11 is a diagram showing the state when the slide cover 60 is slid downward from the state shown in FIG. 10. When the magnet 73b and the magnetic member 79b move downward along the Z-axis direction, the rotation shaft 13ac rotates from the rear to the front, and the movable member 79a swings from the rear to the front. At this time, the rotational resistance of the rotation shaft 13ac acts. When the slide cover 60 slides downward, the adsorption between the magnet 73b and the magnetic member 79b is released. Alternatively, the magnetic member 79b moves downward in the Z-axis direction following the magnet 73b. When the magnetic member 79b moves, the movable member 79a is instantaneously arranged at the first position S1, and a portion that overlaps in plan view among the first adsorption surface 73ba and the second adsorption surface 79ba can be adsorbed. At this time, the movable member 79a abuts on the second stopper 79e above the extending portion 79aa. When the extending portion 79aa abuts on the second stopper 79e, the swinging of the movable member 79a is prevented by the force applied by the second stopper 79e to the extending portion 79aa. Therefore, when the movable member 79a is arranged at the first position S1, the swinging of the movable member 79a stops. Since the swinging of the movable member 79a stops, the movement of the magnetic member 79b following the magnet 73b is prevented. Therefore, the adsorption between the magnet 73b and the magnetic member 79b is released. Thus, the sliding lock of the slide cover 60 is released by the sliding of the slide cover 60 with momentum and the stop of the swinging of the movable member 79a by the second stopper 79e.

[0056] As described above, according to the locking mechanism 80 of the present embodiment, as shown in FIG. 8, when the movable member 79a is in the first position S1, the magnet 73b of the biasing portion 73 of the slide cover 60 and the magnetic body 79b of the attached portion 79 are attracted to each other. When the magnet 73b and the magnetic body 79b are attracted to each other, the downward slide of the slide cover 60 in the Z-axis direction is locked. When the slide cover 60 is moved upward in the Z-axis direction from the state where the slide of the slide cover 60 is locked, as shown in FIG. 10, the magnetic body 79b is pushed up by the magnet 73b, and the movable member 79a moves to the second position S2. In this state, when the user slides the slide cover 60 downward in the Z-axis direction, the slide cover 60 can be moved downward in the Z-axis direction with momentum. At this time, the attraction between the magnet 73b and the magnetic body 79b is released. That is, the lock on the slide of the slide cover 60 can be released. Therefore, the user can release the lock on the slide of the slide cover 60 by sliding the slide cover 60 only in the Z-axis direction. In addition, the attraction between the magnet 73b and the magnetic body 79b can be released with a relatively small force. Therefore, the locking mechanism 80 can release the lock relatively easily.

[0057] According to the locking mechanism 80 of the present embodiment, the force required to slide the slide cover 60 to the other side in the Z-axis direction when the movable member 79a is in the second position S2 is smaller than the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is in the first position S1. In the present embodiment, in order to slide the slide cover 60 to the other side in the Z-axis direction when the movable member 79a is in the second position S2, a force larger than the rotational resistance generated when the rotation shaft 13ac rotates from the rear to the front is required. The rotational resistance is smaller than the attraction force between the magnet 73b and the magnetic body 79b. Therefore, it is possible to use less force to slide the slide cover 60 after the movable member 79a is arranged in the second position S2 than to separate the magnet 73b and the magnetic body 79b when the movable member 79a is in the first position S1. Thereby, the locking mechanism 80 can release the lock relatively easily.

[0058] According to the locking mechanism 80 of the present embodiment, the biased portion 73 includes a magnet 73b. The attached portion 79 includes a magnetic body 79b. The magnet 73b has a first adsorption surface 73ba that adsorbs to the magnetic body 79b. The magnetic body 79b has a second adsorption surface 79ba that adsorbs to the magnet 73b. The contact area between the first adsorption surface 73ba and the second adsorption surface 79ba when the movable member 79a is in the second position S2 is smaller than the contact area between the first adsorption surface 73ba and the second adsorption surface 79ba when the movable member 79a is in the first position S1. That is, the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is in the second position S2 is smaller than the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is in the first position S1. Therefore, when the user slides the slide cover 60 downward in the Z-axis direction, the slide of the slide cover 60 is easily unlocked. Further, since the locking mechanism 80 of the present embodiment does not use locking by, for example, electric control, failures and deteriorations of the locking mechanism 80 are relatively unlikely to occur. Therefore, the locking mechanism 80 can be used for a relatively long time.

[0059] According to the locking mechanism 80 of the present embodiment, the locking mechanism 80 includes a constant load spring 78 that biases the slide cover 60 upward in the Z-axis direction. In the present embodiment, the constant load spring 78 biases the biased portion 73 upward, so that the slide cover 60 is biased upward. When the user slides the slide cover 60 downward in the Z-axis direction to release the lock of the locking mechanism 80, the momentum of the slide of the slide cover 60 may become excessive. Since the constant load spring 78 biases the slide cover 60 upward in the Z-axis direction, it is suppressed that the momentum of the slide of the slide cover 60 becomes excessive. Further, the slide cover 60 is a member with a relatively large weight. When the user slides the slide cover 60 upward in the Z-axis direction to open the first opening 12a and the second opening 12b, since the constant load spring 78 biases the slide cover 60 upward, the force required for the user to slide the slide cover 60 can be made relatively small. Therefore, since the constant load spring 78 biases the slide cover 60 upward, the operability of the slide of the slide cover 60 by the user is improved.

[0060] According to the locking mechanism 80 of the present embodiment, the constant load spring 78 biases the slide cover 60 upward in the Z-axis direction with a constant force regardless of the position of the slide cover 60 in the Z-axis direction. That is, the biasing force of the constant load spring 78 is constant regardless of the length of the spring portion 78a drawn out from the drum portion 78b. Here, if the spring that biases the slide cover 60 is, for example, a compression spring, the biasing force by the compression spring changes depending on the position of the slide cover 60. Therefore, the force required to slide the slide cover 60 changes depending on the position of the slide cover 60 in the Z-axis direction. However, since the constant load spring 78 is provided as in the present embodiment, even if the position of the slide cover 60 in the Z-axis direction changes, the force required to slide the slide cover 60 does not change. Therefore, the operability of the slide of the slide cover 60 by the user is further improved.

[0061] According to the locking mechanism 80 of the present embodiment, the first stopper 79d abuts on the lower side of the extending portion 79aa when the movable member 79a is in the second position S2. Thereby, when the user slides the slide cover 60 upward in the Z-axis direction, the movable member 79a is prevented from moving upward from the second position S2. If the slide cover 60 is slid upward until the movable member 79a is disposed at a position above the second position S2, then when the slide cover 60 is slid downward thereafter, the momentum of the slide cover 60 may become excessive. As in the present embodiment, the first stopper 79d prevents the movable member 79a from sliding upward from the second position S2, thereby suppressing the excessive momentum of the slide of the slide cover 60.

[0062] According to the locking mechanism 80 of the present embodiment, the second stopper 79e abuts on the upper side of the extending portion 79aa of the movable member 79a above the extending portion 79aa when the movable member 79a is in the first position S1. Therefore, when the slide cover 60 slides downward in the Z-axis direction, the movable member 79a abuts on the second stopper 79e at the first position S1. At this time, the movable member 79a is prevented from swinging from the rear to the front. Therefore, the movement of the magnetic body 79b attached to the movable member 79a following the magnet 73b is suppressed. Therefore, since the locking mechanism 80 includes the second stopper 79e, it is easy to disengage the lock of the slide of the slide cover 60.

[0063] Furthermore, when the slide of the slide cover 60 is unlocked by the second stopper 79e, the position of the movable member 79a is always arranged at the first position S1. Here, from the state where the movable member 79a is at the first position S1, the adsorption between the magnet 73b and the magnetic body 79b can be separated as it is without moving the movable member 79a to the second position S2. That is, by a force exceeding the attachment force of the magnet 73b to the magnetic body 79b when the movable member 79a is at the first position, the slide cover 60 can be slid downward to separate the adsorption between the magnet 73b and the magnetic body 79b. Also at this time, the movable member 79a remains arranged at the first position S1. Therefore, regardless of the method of unlocking the slide of the slide cover 60, the movable member 79a in the unlocked state is arranged at the first position S1. Therefore, when the user slides the slide cover 60 next, the position where the locking mechanism 80 locks is always constant. Thereby, the operability of the slide cover 60 by the user is improved.

[0064] According to the locking mechanism 80 of the present embodiment, the left inner wall 13a includes a rotation shaft 13ac. The movable member 79a is configured to swing with the rotation shaft 13ac as a support shaft and is movable between the first position S1 and the second position S2. Therefore, when the user slides the slide cover 60 upward with the magnet 73b and the magnetic body 79b adsorbed, the magnet 73b pushes up the magnetic body 79b, and a rotational moment acts on the movable member 79a. By the action of the rotational moment, the movable member 79a moves from the first position S1 to the second position S2. Therefore, in order to move the movable member 79a to the second position, the force applied to the slide cover 60 can be made relatively small.

[0065] According to the locking mechanism 80 of the present embodiment, the direction in which the slide cover 60 slides is the vertical direction. More specifically, it is the direction from the front and below to the rear and upward (Z-axis direction). That is, the slide rail 70 extends in the vertical direction. Since the direction in which the slide cover 60 moves is the vertical direction, when the user slides the slide cover 60 downward (releases the lock) from the state where the movable member 79a is in the second position S2, the gravitational force applied to the slide cover 60 can be utilized. Thereby, the force applied to the slide cover 60 to release the lock can be reduced as compared with the case where the slide rail 70 extends, for example, in the left-right direction.

[0066] The cutting machine 100 of the present embodiment includes a case body 10 in which a processing chamber A1 for cutting a workpiece 5 is formed, and a first opening 12a is formed in front of the processing chamber A1, a slide cover 60, and a locking mechanism 80. The user locks the sliding of the slide cover 60 by the locking mechanism 80, for example, when preparing the workpiece 5 inside the processing chamber A1. When the preparation of the workpiece 5 is completed, the user slides the slide cover 60 upward and then moves it below the slide cover 60 to release the lock of the slide. At this time, the first opening 12a is closed. Thereafter, the user cuts the workpiece 5. Therefore, the user can release the lock of the slide by operating the slide cover 60 to slide during the cutting process of the cutting machine 100. That is, it is possible to relatively easily release the lock of the slide of the slide cover 60 during the cutting process.

[0067] 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.

[0068] In the above-described embodiment, the locking mechanism 80 locks the sliding of the slide cover 60 by the adsorption of the magnet 73b and the magnetic body 79b, but the present invention is not limited thereto. The locking mechanism 80 may include, for example, a hook member and a hooked member. When the movable member 79a is in the first position S1, the hook member and the hooked member may be engaged with each other, and when the movable member 79a is in the second position S2, the engagement between the hook member and the hooked member may be disengaged.

Explanation of Signs

[0069] 13a Left inner wall (rail support member) 60 Slide cover 70 Slide rail 73b Magnet (mounting member) 79a Movable member 79b Magnetic body (member to be mounted) 80 Locking mechanism S1 First position S2 Second position 100 Machining machine

Claims

1. A locking mechanism for locking the sliding of a slide member that slidably engages with a slide rail extending in a predetermined direction, comprising: a movable member movably provided on a rail support member that supports the slide rail; a member to be attached fixed to the movable member; a mounting member fixed to the slide member and detachable from the member to be attached; and the member to be attached is disposed on one side in the predetermined direction with respect to the mounting member; the movable member is configured to be movable between a first position that is a position when the slide member is locked from sliding to the other side in the predetermined direction by attaching the mounting member to the member to be attached, and a second position that is a position when the member to be attached is located on one side in the predetermined direction rather than the first position. The locking mechanism.

2. The force required to slide the slide member to the other side in the predetermined direction when the movable member is in the second position is smaller than the attachment force of the mounting member to the member to be attached when the movable member is in the first position. The locking mechanism according to claim 1.

3. One of the mounting member and the member to be attached is a magnet having a first adsorption surface that adsorbs to the other of the mounting member and the member to be attached; the other of the mounting member and the member to be attached is a magnetic body having a second adsorption surface that adsorbs to one of the mounting member and the member to be attached; The contact area between the first adsorption surface and the second adsorption surface at the second position is smaller than the contact area between the first adsorption surface and the second adsorption surface at the first position. The locking mechanism according to claim 2.

4. The locking mechanism according to claim 1, further comprising a biasing member that biases the slide member to one side in the predetermined direction.

5. The biasing member is a constant load spring that biases the slide member with a constant force regardless of the position of the slide member in the predetermined direction. The locking mechanism according to claim 4.

6. The locking mechanism according to claim 1, further comprising a first stopper that abuts against the movable member on the other side in the predetermined direction of the movable member when the movable member is in the second position.

7. The locking mechanism according to claim 1, further comprising a second stopper that abuts against the movable member on one side in the predetermined direction of the movable member when the movable member is in the first position.

8. The rail support member includes a rotation shaft that supports the movable member. The movable member swings about the rotation shaft as a pivot shaft and is configured to be movable between the first position and the second position. The locking mechanism according to claim 1. **Claim 9** The predetermined direction is the vertical direction. The locking mechanism according to claim 1. **Claim 10** A case body having a machining chamber for machining a workpiece to be machined formed therein, and an opening formed in front of the machining chamber. A slide cover as the slide member disposed in front of the opening. A cutting machine comprising the locking mechanism according to any one of claims 1 to 9.

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