Processing device

Abstract

To suppress chips and liquid for cooling from leaking out.SOLUTION: An area cover 200 covers a processing area 120 in which a tool 12 gripped by a main spindle 11 processes a work-piece. The area cover 200 has a first opening part formed so that the main spindle 11 can move in an X-axis direction while intruding into the processing area 120. A winding-up cover 300 is a sheet-like cover mounted on the main spindle 11 so that the main spindle 11 can intrude into the area cover 200, which is arranged inside the area cover 200 to cover the first opening part. Pressing plates 304a and 304b press the winding-up cover 300 against the inside of the area cover 200.SELECTED DRAWING: Figure 14

Description

[Technical field]

[0001] The present invention relates to a processing device that processes a workpiece. [Background technology]

[0002] A machining device has been proposed that has a take-up cover attached to the spindle to prevent chips and coolant generated during machining of a workpiece from scattering onto the guide of the spindle or to the outside (Patent Document 1). In the configuration described in Patent Document 1, the take-up cover is disposed on the outside of the frame (the side opposite to the machining area). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-167836 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the winding cover is positioned outside the frame body as in the configuration described in Patent Document 1, there is a risk that cutting chips and coolant (cooling liquid) adhering to the winding cover may leak to the outside when the winding cover is moved. [Means for solving the problem]

[0005] One aspect of the present invention is a processing device comprising: a spindle that holds a tool; a moving unit that moves the spindle in a predetermined direction; an area cover that covers a processing area in which a workpiece is processed by the tool held by the spindle, the area cover having an opening formed to allow the spindle to move in the predetermined direction while entering the processing area; a sheet-like take-up cover attached to the spindle so that the spindle can enter the inside of the area cover, which is the processing area side, and is provided on the inside of the area cover so as to cover the opening, and when the spindle moves in the predetermined direction, the downstream side of the take-up cover in the predetermined direction is taken up and the upstream side of the predetermined direction is pulled out, thereby covering the opening while allowing the spindle to move in the predetermined direction; and a pressing member that presses the take-up cover against the inside of the area cover. Effect of the Invention

[0006] According to the present invention, leakage of chips and cooling liquid to the outside can be suppressed. [Brief description of the drawings]

[0007] [Figure 1] 1 is an external perspective view of a processing system according to an embodiment. [Diagram 2] FIG. 1 is an external front view of a processing system according to an embodiment. [Diagram 3] FIG. 1 is a perspective view of a processing machine according to an embodiment. [Figure 4] FIG. 2 is a control block diagram of the machining system according to the embodiment. [Diagram 5] FIG. 4A is a cross-sectional view showing the processing apparatus according to the embodiment with the internal configuration thereof omitted and the opening / closing door open, and FIG. 4B is an enlarged view of a portion of FIG. [Figure 6] FIG. 4A is a cross-sectional view showing a state in which the internal configuration of the processing device according to the embodiment is omitted and the opening / closing door is closed, and FIG. 4B is an enlarged view of a portion of FIG. [Figure 7] FIG. 2A is a perspective view showing a state in which a part of the processing device according to the embodiment is cut away and an opening / closing door is open, and FIG. 2B is a perspective view of a filter. [Figure 8] FIG. 2 is a cutaway front view of a lower portion of the processing device according to the embodiment. [Figure 9] FIG. 2 is a perspective view of a frame of the processing device according to the embodiment. [Figure 10] 1A is a side view showing a cutaway view of the area cover and the Y-axis moving mechanism of the processing apparatus according to the embodiment, and FIG. 1B is an enlarged view of a portion of FIG. [Figure 11] FIG. 4A is a perspective view of an area cover and a Y-axis moving mechanism of the processing device according to the embodiment, and FIG. 4B is a perspective view of the tray. [Figure 12] FIG. 2 is a perspective view showing an area cover and an internal configuration of the area cover of the processing apparatus according to the embodiment. [Figure 13] FIG. 4 is a perspective view of the area cover and the processing machine, with a portion cut away, viewed obliquely from above, showing the attached state of the winding cover according to the embodiment. [Figure 14] FIG. 4 is a perspective view of the area cover and the processing machine, with a portion cut away, viewed obliquely from below, showing the attached state of the winding cover according to the embodiment. [Figure 15] FIG. 4 is an exploded perspective view showing the mounting configuration of the winding cover according to the embodiment, as viewed obliquely from above. [Figure 16] FIG. 4 is an exploded perspective view of the mounting configuration of the winding cover according to the embodiment, as viewed obliquely from below. [Figure 17] FIG. 4 is a cutaway perspective view of the roller bracket and its periphery according to the embodiment. [Figure 18] FIG. 4 is a partially cutaway perspective view showing the configuration of the roller bracket and its surroundings according to the embodiment. [Figure 19] 4A is a perspective view showing a part of a presser plate and a take-up cover according to the embodiment, and FIG. 4B is a perspective view showing the take-up cover of FIG. 4A without the take-up cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The embodiment will be described with reference to Fig. 1 to Fig. 19. First, the overall configuration of a processing system 1000 of the present embodiment will be described with reference to Figs.

[0009] [Processing system] The machining system 1000 includes a machining device 2000 and a coolant liquid supply device 2100. The machining device 2000 machines a workpiece with a tool in a machining area 120. The machining device 2000 accommodates a processing machine 100 in an exterior cover 101 as a housing. That is, the exterior cover 101 has a spindle, a tool magazine, and the like, which will be described later, arranged inside. The exterior cover 101 is provided with an openable / closable door 102 (omitted in Figs. 1 and 2, see Figs. 5 to 8, which will be described later). When the openable door 102 is open, the inside of the housing, that is, the machining area 120, which will be described later, can be accessed, and the workpiece can be replaced or the tool can be replaced manually. In addition, the openable door 102 is closed during machining of the workpiece. A detailed description of the machining device 2000 and the processing machine 100 will be given later.

[0010] The coolant supplying device 2100 is a device that supplies the coolant, which is a liquid for cooling a workpiece, a tool, etc., into the processing area 120 of the processing device 2000. The coolant supplying device 2100 of this embodiment is disposed below the processing device 2000, and includes a tank 2101, a pump 2102, a flowmeter 2103, an electromagnetic valve 2104, etc., which are connected by pipes 2110 to 2114. The arrows shown in FIG. 1 and FIG. 2 indicate the path and direction of the coolant flow. The tank 2101 contains the coolant, and the pump 2102 sucks the coolant from the tank 2101 through the pipe 2110 and sends it to the pipe 2111. The coolant sent to the pipe 2111 passes through the flowmeter 2103 through the pipe 2112. The flow meter 2103 measures the flow rate of the coolant liquid supplied from the pump 2102, and transmits a signal to a CPU 85 (FIG. 4) which is a main control unit of the machining system 1000 described later. A strainer 2105 is provided midway along the piping 2112 to remove foreign matter from within the piping path.

[0011] The coolant liquid that has passed through the flowmeter 2103 is sent to a pipe 2113 and reaches an electromagnetic valve 2104 provided in the pipe 2113. The electromagnetic valve 2104 opens and closes the flow path, and is controlled by the above-mentioned CPU 85 to start and stop the supply of the coolant liquid to the machining device 2000. The pipe 2113 is connected to the machining device 2000, and the coolant liquid that passes through the electromagnetic valve 2104 in an open state is supplied into the machining area 120 via a coolant discharge part 2002 as a coolant liquid supply part provided in a spindle head 2001 of the machining device 2000. When the electromagnetic valve 2104 is in a closed state, the coolant liquid supplied from the pump 2102 is returned to the tank 2101 via a pipe 2114 branched from the pipe 2111.

[0012] The coolant discharge unit 2002 is, for example, a nozzle provided around the spindle 11 (FIG. 3) of the spindle head 2001, and supplies the coolant toward the tool held by the spindle 11 and the workpiece to be processed by discharging the coolant downward. The coolant supplied from the coolant discharge unit 2002 accumulates in the lower part of the machining area 120 and is discharged from the lower part of the machining device 2000. A tray 2106 is provided below the machining device 2000, which receives the coolant discharged from the machining device 2000 and returns it to the tank 2101. In this way, the machining system 1000 of this embodiment uses the coolant to cool the tool and the workpiece during machining. In this embodiment, an air blow unit 87 (FIG. 4) is provided to blow air onto the tool or the like.

[0013] [Processing machine] Next, the processing machine 100 arranged inside the exterior cover 101 of the processing device 2000 will be described with reference to Fig. 3. The processing machine 100 includes a frame 1 as a moving mechanism support member, a first moving mechanism (Z-axis moving mechanism) 10, a second moving mechanism (X-axis moving mechanism) 20, and a third moving mechanism (Y-axis moving mechanism) 30 each supported by the frame 1, a support mechanism 40 that supports a workpiece W as a processing target, a first rotating mechanism (rotating device) 50 and a second rotating mechanism 60 as rotating means capable of rotating the support mechanism 40, a tool magazine 70, and an electrical unit 80. The first moving mechanism 10, the second moving mechanism 20, and the third moving mechanism 30 constitute a moving device 100A as a moving means that relatively moves a spindle 11 and a holding device 41 described later in three axial directions of X, Y, and Z.

[0014] The frame 1 is placed on a stand 2 having an internal cavity, and as shown in Fig. 3, is composed of a first frame portion 3 and a second frame portion 4 bent at a right angle from an end of the first frame portion 3. In this embodiment, the first frame portion 3 is disposed along the vertical direction, and the second frame portion 4 is disposed along the horizontal direction. A detailed description of the frame 1 will be given later.

[0015] The first moving mechanism 10 is supported by the first frame portion 3 of the frame 1 via the second moving mechanism 20, and can move the spindle 11 in the Z-axis direction (vertical direction, first direction). A tool 12 is detachably attached to the spindle 11 via a tool holder. That is, the spindle 11 can hold the tool 12. The spindle 11 is rotationally driven by a motor 13. The first moving mechanism 10 has a motor 14 and a guide shaft (not shown) arranged in the Z-axis direction, and moves the spindle 11 back and forth (raise and lower) in the Z-axis direction along the guide shaft by driving the motor 14. The spindle 11 is supported movably on the guide shaft via a Z-axis support member (not shown). The guide shaft and the Z-axis support member are covered by a cover 17.

[0016] The second moving mechanism 20 as a moving part is supported by the first frame part 3 of the frame 1, and can move the main shaft 11 together with the first moving mechanism 10 in the X-axis direction (predetermined direction, horizontal direction, second direction) perpendicular to the Z-axis direction. The second moving mechanism 20 has a motor 21, a guide shaft 22 arranged in the X-axis direction, and rails 23 and 24 arranged in the X-axis direction, and moves the first moving mechanism 10 back and forth in the X-axis direction along the guide shaft 22 by driving the motor 21. Specifically, the guide shaft 22, which is a screw shaft, is inserted into a nut member 19 fixed to a holding part 18 that holds the main shaft 11 and the first moving mechanism 10. In addition, the holding part 18 is provided with engagement parts 25 and 26 that engage with the rails 23 and 24. When the guide shaft 22 is rotated by the motor 21, the nut member 19 screwed with the guide shaft 22 moves along the guide shaft 22. Then, the holding portion 18 to which the nut member 19 is fixed, and the main shaft 11 and first moving mechanism 10 held by the holding portion 18 move in the X-axis direction based on the engagement between the engagement portions 25, 26 and the rails 23, 24.

[0017] The third moving mechanism 30 is supported on the lower surface of the second frame portion 4 of the frame 1, and can move the support mechanism 40 in the Y-axis direction (horizontal direction, third direction) perpendicular to the Z-axis direction and the X-axis direction. The third moving mechanism 30 has a motor 32 (see FIG. 10(a) described later) and a guide shaft (not shown) arranged in the Y-axis direction, and moves the support mechanism 40 back and forth in the Y-axis direction along the guide shaft by driving the motor 32. As shown in FIG. 3, the support mechanism 40 side of the pedestal 2 in the Y-axis direction is open. The third moving mechanism 30 can move the support mechanism 40 in the Y-axis direction together with the second rotating mechanism 60 and the first rotating mechanism 50, as described in detail later.

[0018] The support mechanism 40 supports a workpiece W as a processing object such as a dental prosthesis to be machined by the tool 12. Such a support mechanism 40 has a holding device 41 as a holding part that holds the workpiece W, and a support part 42 whose both ends are respectively connected to a rotating part 51 of the first rotating mechanism 50 and that supports the workpiece W via the holding device 41.

[0019] The first rotation mechanism 50 as a rotating device can rotate the support mechanism 40 around the a-axis as a rotation axis perpendicular to the Z-axis direction. In this embodiment, the a-axis is parallel to the X-axis direction. Such a first rotation mechanism 50 has a support frame 53 that rotatably supports the rotating part 51, and a motor that rotates the rotating part 51. The support frame 53 is formed in a substantially U-shape so as to surround the periphery of the support mechanism 40, and is composed of a first support part 53a that supports the motor and the rotating part 51 on one side (driving side), a second support part 53b that supports the rotating part on the other side (driven side), and a connecting part 53c that connects the first support part 53a and the second support part 53b.

[0020] The rotating part 51 supported by the first support part 53a and the rotating part supported by the second support part 53b are arranged to face each other in the a-axis direction and to be rotatable about the a-axis as a rotation axis. Both ends of the support mechanism 40 in the a-axis direction are supported by the rotating parts on both sides. As a result, the first rotation mechanism 50 supports the support mechanism 40 rotatably about the a-axis (X-axis).

[0021] The first rotation mechanism 50 can rotate at least 180° and can invert the front and back of the workpiece W supported by the support mechanism 40. In this embodiment, the first rotation mechanism 50 can rotate the support mechanism 40 360° around the a-axis. Since an extension of the a-axis passes through the center in the thickness direction of the workpiece W supported by the support mechanism 40, the distance from the a-axis, which is the rotation central axis, to the front surface and the distance from the a-axis to the back surface are the same. Therefore, even if the front and back of the workpiece W are inverted, the positional relationship between the center in the thickness direction of the workpiece W and the tool 12 does not change.

[0022] The second rotation mechanism 60 can rotate the support mechanism 40 around the b-axis, which is another rotation axis perpendicular to the Z-axis and a-axis. In this embodiment, the b-axis is parallel to the Y-axis. Such a second rotation mechanism 50 has a rotating unit to which the support frame 53 of the first rotation mechanism 50 is attached, and a motor that rotates and drives the rotating unit. The rotating unit is attached to a connecting portion 53c of the support frame 53, and is rotated by the motor to rotate the support frame 53 around the b-axis. Therefore, the second rotation mechanism 60 supports the support mechanism 40 together with the first rotation mechanism 50 so that the support mechanism 40 can rotate around the b-axis (Y-axis).

[0023] The tool magazine 70, which serves as a tool holding section, can store a plurality of tools and is disposed adjacent to the first rotating mechanism 50. The tool magazine 70 can be moved in the Y-axis direction together with the support mechanism 40 and the like by the third moving mechanism 30. However, even if the support mechanism 40 rotates about the a-axis, the tool magazine 70 does not rotate, and even if the support mechanism 40 rotates about the b-axis, the tool magazine 70 does not rotate. In other words, the tool magazine 70 is supported so as to maintain a predetermined posture even if the support mechanism 40 rotates about the a-axis and the b-axis. The tool magazine 70 can be moved in the Y-axis direction together with the support mechanism 40 and the like by the third moving mechanism 30.

[0024] In the tool magazine 70, a plurality of types of tools are held and arranged in a plurality of rows along the Y-axis direction, each of which is formed integrally with the tool holder 12a. The tools attached to the spindle 11 are replaceable. The tool holder 12a is a part held by the spindle 11, and may be formed integrally with the tool or may be formed separately. In this embodiment, the tool 12 is attached to the tool holder 12a with a chuck, and the chuck part of the spindle 11 for holding the tool holds the tool holder 12a via the tool holder 12a, forming a double chuck configuration. However, the tool may be attached directly to the spindle 11. The tool may be replaced by an operator or automatically by the processing machine 100. In this embodiment, the spindle 11 is configured to automatically grip and release the tool in order to automatically replace the tool.

[0025] When the tool is automatically replaced, the second moving mechanism 20 and the third moving mechanism 30 move the empty space of the tool magazine 70 where no tool is inserted to below the spindle 11. In other words, the spindle 11 is moved relative to the tool magazine 70 on the XY plane. Then, the first moving mechanism 10 lowers the spindle 11 (moves it in the Z-axis direction), and an attachment / detachment device such as a chuck provided on the spindle 11 is operated to remove the tool 12 attached to the spindle 11 and place it in the empty space of the tool magazine 70. Next, the first moving mechanism 10 raises the spindle 11, and the second moving mechanism 20 and the third moving mechanism 30 move the position of the tool magazine 70 where the tool 12 to be replaced is located to below the spindle 11. Then, the first moving mechanism 10 lowers the spindle 11 again, and the attachment / detachment device is operated to mount the tool 12 to be replaced on the spindle 11. The tool 12 is, for example, a drill or an end mill.

[0026] In this embodiment, before and after storing or removing the tool, the tip of the tool 12 is brought into contact with a touch sensor 96 as a tip detection means capable of detecting the tip of the tool 12 held by the spindle 11, thereby performing an operation of confirming whether or not the tool 12 is held by the spindle 11. That is, in an exchange operation in which the tool held by the spindle 11 is replaced with any one of a plurality of tools stored in the tool magazine 70, an operation of confirming whether or not the tool 12 is held by the spindle 11 can be performed using the touch sensor 96. At this time, the center (a-axis) of the workpiece in the Z direction and the tip of the tool are aligned. The touch sensor 96 is provided at a position adjacent to the tool magazine 70, as shown in FIG. 2. Particularly, in this embodiment, the touch sensor 96 is disposed on the second support portion 53b that supports the driven-side rotating portion. A detailed explanation of the tool exchange operation will be given later.

[0027] The electrical equipment unit 80 is attached to the inside of the frame 1. That is, the electrical equipment unit 80 is disposed on the upper side of the second frame portion 4, opposite to the side on which the first moving mechanism 10 of the first frame portion 3 is supported. Such an electrical equipment unit 80 controls the processing system 1000 or the processing device 2000, and includes a control board that controls the driving of the motors of the main shaft and each shaft, and a plurality of control portions that calculate pulses to be output to the motors from signals of the rotary encoders of the respective corresponding motors and appropriately control the rotation of the respective corresponding motors.

[0028] Moreover, the processing machine 100 of this embodiment is an NC processing machine that performs automatic processing under computer control. Specifically, processing data is created by a CAD / CAM system using an external terminal such as a personal computer, and the workpiece W is processed by numerical control based on this data. For this purpose, an external terminal such as a personal computer that issues commands to the processing machine 100 is connected to the processing machine 100. Note that the processing machine 100 itself may be provided with a computer equipped with a CPU and memory capable of numerical control. The control means described later may be provided in either the processing machine or the computer connected to the processing machine.

[0029] For example, when a dental prosthesis (dental material) is produced by the processing machine 100, data of the dental prosthesis measured by a three-dimensional measuring device is transferred to a CAD / CAM system, and processing data is produced by the CAD / CAM system. Then, based on this processing data, the processing machine 100 is controlled to cut the workpiece W with the tool 12, thereby producing the dental prosthesis.

[0030] Next, the control configuration within the electrical equipment unit 80 will be described with reference to Fig. 4. The electrical equipment unit 80 includes a CPU 85 as a control means (main control unit), an input / output port (I / O) 86i, motor control units 84x, 84y, and 84z, a spindle control unit 84c, an a-axis control unit 84a, and a b-axis control unit 84b. The CPU 85 performs various calculations using a memory 86m based on input data and signals, and transmits instructions on rotation speed and position to the control units 84x, 84y, 84z, 84a, 84b, and 84c as connected servo amplifiers.

[0031] The I / O 86i is connected to the compressor 350, the pump 2102, the touch sensor 96, the air pressure detection sensor 91, the flow meter 2103, and the solenoid valve 2104. The compressor 350 supplies air to an air blow unit 87 of the processing device 2000. The air blow unit 87 blows the air supplied from the compressor 350 to the tool 12 attached to the spindle 11 to cool the tool 12 and remove chips adhering to the tool 12. The pressure of the air supplied to the air blow unit 87 is detected by an air pressure detection sensor 91, and a detection signal of the air pressure detection sensor 91 is sent to the CPU 85 via the I / O 86i.

[0032] As described above, the pump 2102 supplies the coolant to the coolant discharge part 2002. The coolant discharge part 2002 supplies the coolant toward the tool 12 and the workpiece. As described above, the touch sensor (tool length sensor) 96 as a tip detection means is used to check whether or not the tool 12 is held by the spindle 11 during a tool replacement operation, and also detects the length of the tool 12 and sends a signal to the CPU 85.

[0033] Motor control units 84x, 84y, 84z provided in the CPU 85 drive the X, Y, Z motors based on commands from the CPU 85. Encoders 21a, 32a, 14a are provided on the motors 21, 32, 14, respectively, as position detection means. The encoders 21a, 32a, 14a detect, for example, the number of rotations, rotation angle, and rotation direction of the rotation shaft of each of the motors 21, 32, 14. Then, they detect the amount of actual movement of each of the stages x, y, z by driving each of the motors 21, 32, 14 (actual position, relative position of the spindle 11 with respect to the holding device 41).

[0034] The spindle control unit 84c controls a motor (not shown) that rotates the spindle 11 to control the rotation speed of the spindle. The a- and b-axis control units 84a and 84b drive the a- and b-axis motors 54 and 62 based on commands from the CPU 85. These motors 54 and 62 are also provided with encoders 54a and 62a, respectively, and are capable of detecting the rotation angles around the a- and b-axes of the support mechanism 40.

[0035] In this manner, the CPU 85 controls each part of the processing machine 100 to perform a predetermined processing on the workpiece W held as described above. The CPU 85 loads a program into a storage means such as the memory 86m and executes each operation and step described below.

[0036] [Opening and closing door] Next, the configuration of the opening and closing door 102 will be described with reference to Figs. 5(a) to 7(a). As shown in Figs. 5(a) and 6(a), an area cover 200 is arranged inside the exterior cover 101 of the processing device 2000 shown in Fig. 1. The area cover 200 is a cover that covers the processing area 120 for processing a workpiece with the tool 12 held by the spindle 11. For this reason, the support mechanism 40 that supports the workpiece, the first rotation mechanism 50 that rotates the support mechanism 40, and the tool magazine 70 are arranged inside the area cover 200, as shown in Fig. 7(a) and Figs. 12 to 14 described later. In addition, a first opening 201 is formed on the upper side of the area cover 200 as an opening through which the spindle 11 can enter. The first opening 201 is covered by a take-up cover 300 (see Fig. 13, etc.) as described later.

[0037] Moreover, the area cover 200 has a second opening 202 at a position different from the first opening 201. That is, the second opening 202 is formed on one side (front side) of the area cover 200 in the Y-axis direction. Here, the one side in the Y-axis direction (the near side of FIG. 2, the → side in FIGS. 5(a) to 6(b)) is the front side of the processing system 1000. On the other hand, the other side in the Y-axis direction (the far side of FIG. 2, the left side in FIGS. 5(a) to 6(b)) is the far side. As shown in FIG. 10(a) described later, the motor 32 of the third moving mechanism 30 and the like are arranged on the far side of the area cover 200.

[0038] As shown in FIG. 5(a) and FIG. 6(a), the second opening 202 is inclined toward the back as it goes vertically upward. That is, the second opening 202 opens obliquely upward. Therefore, as shown in FIG. 6(a), when the opening / closing door 102 is closed, the inner surface (inner side surface) of the opening / closing door 102 facing the machining area 120 faces obliquely downward. While the workpiece is being machined in the machining area 120, the opening / closing door 102 is closed, and the coolant liquid and chips scattered during machining adhere to the inner side surface of the opening / closing door 102. Since the inner side surface of the opening / closing door 102 faces obliquely downward when closed, the coolant liquid and chips adhered to the inner side surface are likely to fall into the machining area 120. Therefore, the coolant liquid and chips are less likely to remain on the inner side surface of the opening / closing door 102, and the coolant liquid and chips can be prevented from leaking to the outside when the opening / closing door 102 is opened.

[0039] As shown in Fig. 5(a) to Fig. 6(b), the opening / closing door 102 can open and close the second opening 202 by rotating around a hinge 110 provided on the lower end side in the vertical direction relative to the area cover 200 as a rotation center. The direction of the axis of rotation of the hinge 110 is approximately horizontal (hereinafter also referred to as "left and right direction"). When opening the opening / closing door 102, the upper end portion in the vertical direction of the opening / closing door 102 is opened forward around the hinge 110 on the lower end side in the vertical direction, and further, as shown in Fig. 5(a), the upper end portion in the vertical direction of the opening / closing door 102 is moved downward to expose the second opening 202. On the other hand, when closing the opening / closing door 102, the upper end portion in the vertical direction of the opening / closing door 102 is lifted upward around the hinge 110 on the lower end side in the vertical direction, and further, as shown in Fig. 6(a), the upper end portion in the vertical direction of the opening / closing door 102 is moved to the back side to cover the second opening 202.

[0040] In this embodiment, the opening and closing door 102 is opened and closed in a rotational direction around the hinge 110, which is located at the lower end in the vertical direction and has a rotation axis in the left-right direction. As shown in FIG. 7(a), the opening and closing door 102 is provided with a light-transmitting window 103. Therefore, even when the opening and closing door 102 is closed, it is possible to visually check the inside of the processing area 120 through the window 103. The inside of the window 103 may be subjected to a water-repellent treatment, such as by attaching a water-repellent film. This makes it possible to prevent the inside of the window 103 from getting dirty.

[0041] A protrusion 104 and a step 105 are provided around the window 103 on the inner surface of the opening / closing door 102. That is, the window 103 is surrounded by the protrusion 104 and the step 105, and as shown in Figs. 5(a), (b) and 7(a), when the opening / closing door 102 is open, the window 103 is located vertically below the upper surfaces of the protrusion 104 and the step 105. The protrusion 104 has a first portion 104a in front of the window 103 when the opening / closing door 102 is open (above the window 103 when the opening / closing door 102 is closed), and a second portion 104b and a third portion 104c on both sides in the left and right direction with respect to the window 103. When the opening / closing door 102 is closed, the upper ends of the second portion 104b and the third portion 104c are smoothly continuous with both ends in the left and right direction of the first portion 104a. When the door 102 is closed, the lower parts of the second portion 104b and the third portion 104c extend to both sides of the step portion 105 in the left-right direction.

[0042] The upper surfaces of the first portion 104a, the second portion 104b, and the third portion 104c of the protrusion 104 on the window 103 side when the door 102 is open are inclined surfaces that are inclined toward the window 103 side as they go downward when the door 102 is open. That is, the inner surface 104d of the first portion 104a is inclined toward the back side as they go downward when the door 102 is open. The inner surface 104d of the second portion 104b is inclined toward the third portion 104c as they go downward when the door 102 is open, and the inner surface 104d of the third portion 104c is inclined toward the second portion 104b as they go downward when the door 102 is open.

[0043] On the other hand, the step portion 105 is formed so as to protrude upward from the surface of the inner surface of the opening / closing door 102 where the window 103 is provided when the opening / closing door 102 is open. The step portion 105 has an inner surface 105a on the window 103 side that is inclined so as to be inclined toward the window 103 as it goes downward when the opening / closing door 102 is open. The step portion 105 protrudes less than the protruding portion 104, and a plurality of grooves 105b (two in this embodiment) formed along the left-right direction are formed in the back part of the step portion 105 when the opening / closing door 102 is open. A bent portion 106 is formed in the end portion on the back side of the step portion 105 when the opening / closing door 102 is open. 5(b), the bending portion 106 is composed of a first inclined portion 106a that is inclined so as to protrude further upward than the step portion 105 when the opening and closing door 102 is open, and a second inclined portion 106b that is inclined so as to protrude downward from the end portion on the back side of the first inclined portion 106a. The height of the apex of the bending portion 106 is the same as the height of the protruding portion 104. The details of the bending portion 106 will be described later.

[0044] In this embodiment, since the window 103 is surrounded by the protrusion 104 and the step 105, when the door 102 is open, the coolant liquid adhering to the inner surface of the door 102 closer to the window 103 than the protrusion 104 and the step 105 is blocked by the protrusion 104 and the step 105. In addition, the inner surface 104d of the protrusion 104 and the inner surface 105a of the step 105 are inclined surfaces that are inclined toward the window 103 as they go downward when the door 102 is open, so that the coolant liquid adhering to the inner surfaces 104d and 105a flows downward along these inclined surfaces. This makes it possible to prevent the coolant liquid adhering to the inner surfaces of the protrusion 104 and the step 105 from leaking to the surroundings when the door 102 is open.

[0045] The grooves 105b ensure the rigidity of the step 105 during processing, and also serve to collect the coolant accumulated on the inner side of the door 102 so that it does not flow outward. The above-mentioned protrusion 104 and step 105 are made of resin, and are manufactured by, for example, vacuum molding or compressed air molding. During this manufacturing process, the grooves 105b function as ribs to ensure rigidity. The grooves 105b are formed in the left-right direction, and are arranged below the inner side 105a of the step 105 when the door 102 is closed. Therefore, when the coolant liquid accumulates inside the inner side 105a when the door 102 is opened, it temporarily stays in the grooves 105b when it flows downward. As a result, the coolant liquid can be prevented from flowing outward from the door 102 with great force, and thus the coolant liquid can be prevented from leaking outward from the inner side of the door 102.

[0046] Meanwhile, a portion of the second opening 202 of the area cover 200 excluding the lower end portion serves as a fitting portion 202a into which the protrusion 104 fits when the opening / closing door 102 is closed. That is, as shown in Fig. 6(a) , when the opening / closing door 102 is closed, the protrusion 104 fits into the fitting portion 202a so as to enter inside the fitting portion 202a. As a result, when the opening / closing door 102 is closed, the portion of the second opening 202 excluding the lower end portion fits into the protrusion 104, thereby making it possible to prevent the coolant liquid from leaking from the inside of the area cover 200 to the outside through this portion.

[0047] Further, the coolant liquid adhering to the area surrounded by the protrusion 104 and the step 105 on the inner surface of the opening / closing door 102 flows downward when the opening / closing door 102 is closed. The step 105 is disposed below this area. As shown in FIG. 6(a), the inner surface 105a of the step 105 is inclined toward the machining area 120 as it goes vertically downward when the opening / closing door 102 is closed. Therefore, the coolant liquid and chips that flow from this area tend to flow down into the machining area 120 along the inner surface 105a of the step 105. In particular, the inclination angle of the inner surface 105a of the step 105 (for example, the inclination angle with respect to the surface of the window 103) is gentler than the inclination angle of the inner surface 104d of the protrusion 104 on the window 103 side. Therefore, as shown in FIG. 6(a), when the opening and closing door 102 is closed, the inclination angle of the inner surface 105a with respect to the horizontal direction can be made large, so that the coolant liquid and chips can easily flow along the inner surface 105a.

[0048] In addition, the opening / closing door 102 is arranged so that the folding part 106, which is the lower end in the vertical direction when the opening / closing door 102 is closed, is located vertically above a part of the area cover 200 when the opening / closing door 102 is open, as shown in Fig. 5(b). That is, when the opening / closing door 102 is open, the folding part 106 is located vertically above the lower end 202b in the vertical direction of the second opening 202 of the area cover 200. The lower end 202b of the second opening 202 is the tip of a protruding part 202c formed to protrude upward from the lower end of the front side of the area cover 200, and at the back side of the protruding part 202c, a space 202d is provided into which the folding part 106 can enter when the opening / closing door 102 is closed, as shown in Figs. 6(a) and 6(b).

[0049] While a workpiece is being machined in the machining area 120, the scattered coolant and chips adhere to the inner surface of the door 102 and flow vertically downward. When the door 102 is opened after machining, the coolant may fall from the lower end of the door 102. In this embodiment, as described above, the bent portion 106 located at the lower end of the door 102 is disposed so as to be located vertically above a part of the area cover 200 when the door 102 is open. Therefore, even if the coolant falls from the bent portion 106 when the door 102 is opened, the coolant falls into the space 202d of the area cover 200. This makes it possible to prevent the coolant from leaking to the outside when the door 102 is opened.

[0050] 6(a) and (b), the first inclined portion 106a of the bending portion 106 is inclined vertically downward from the side of the opening / closing door 102 toward the inside of the area cover 200 when the opening / closing door 102 is closed. Also, as shown in FIGS. 5(a) and (b), the first inclined portion 106a is inclined vertically downward from the side of the area cover 200 toward the center of the opening / closing door 102 when the opening / closing door 102 is open.

[0051] Therefore, when the opening / closing door 102 is closed, the coolant liquid that adheres to the inner surface of the opening / closing door 102 and flows downward flows down into the inside of the area cover 200 along the first inclined portion 106a. Therefore, the coolant liquid is less likely to remain on the inner surface of the opening / closing door 102, and the coolant liquid can be prevented from scattering to the outside when the opening / closing door 102 is opened. Furthermore, when the opening / closing door 102 is open, the coolant liquid that adheres to the first inclined portion 106a flows toward the center of the opening / closing door 102 along the first inclined portion 106a. Therefore, the coolant liquid that adheres to the first inclined portion 106a can be prevented from leaking to the outside when the opening / closing door 102 is opened. Furthermore, the coolant liquid that adheres to the inner surface of the opening / closing door 102 can be prevented from leaking to the outside along the first inclined portion 106a.

[0052] In addition, the bending portion 106 is provided with a contact portion 107. The contact portion 107 is a plate-like member having elasticity such as rubber, and is fixed to the bending portion 106 so as to protrude from the tip of the second inclined portion 106b along the inclination direction of the second inclined portion 106b of the bending portion 106. In this embodiment, the contact portion 107 is provided on the lower surface of the bending portion 106 when the opening and closing door 102 is open. As shown in FIG. 5(b), such a contact portion 107 protrudes further toward the processing area 120 than the end of the second inclined portion 106b on the processing area 120 side when the opening and closing door 102 is open, and as shown in FIG. 6(b), it protrudes further downward than the lower end of the second inclined portion 106b in the vertical direction and further toward the front side (the opposite side to the processing area 120) than the tip of the second inclined portion 106b when the opening and closing door 102 is closed.

[0053] As shown in FIG. 6(b), the contact portion 107 elastically contacts a part of the area cover 200 when the opening / closing door 102 is closed. As described above, a protruding portion 202c is formed at the lower end of the front side of the area cover 200 so as to protrude upward, and when the opening / closing door 102 is closed, the bent portion 106 enters the space 202d behind the protruding portion 202c. Since the contact portion 107 protrudes further forward than the tip of the second inclined portion 106b when the opening / closing door 102 is closed, when the opening / closing door 102 is closed, the tip of the contact portion 107 contacts the inner surface of the protruding portion 202c. Note that the contact portion 107 does not have to be made of rubber as long as a certain degree of sealing can be ensured between the lower end of the opening / closing door 102 and the area cover 200 when the opening / closing door 102 is closed.

[0054] In this manner, in this embodiment, when the opening / closing door 102 is closed, the contact portion 107 contacts the protruding portion 202c of the area cover 200 on the vertical lower side of the opening / closing door 102, thereby preventing the coolant from leaking to the outside during machining. As described above, when the opening / closing door 102 is closed, the protruding portion 104 fits into the fitting portion 202a on the vertical upper side and both left and right sides of the opening / closing door 102, thereby preventing the coolant from leaking to the outside during machining. Also, the inner side surface 105a of the step portion 105 and the first inclined portion 106a of the bent portion 106 described above make it easier for the coolant attached to the inner side surface of the opening / closing door 102 to flow toward the machining area 120.

[0055] [Discharge configuration within processing area] Next, the discharge configuration of the coolant and chips in the machining area 120 will be described with reference to Fig. 7(a) to Fig. 8. The coolant discharged from the coolant discharge part 2002 (Fig. 1) during machining and the chips generated when machining the workpiece are collected at the bottom of the area cover 200. As described above, the coolant and chips adhering to the inner side of the opening and closing door 102 also flow into the machining area 120 along the inner side surface 105a of the step part 105 and the first inclined part 106a of the bent part 106, and are collected at the bottom of the area cover 200.

[0056] As shown in Fig. 7(a), a filter 203 is disposed at the bottom of the area cover 200, which captures foreign matter such as chips that have gathered at the bottom and allows the coolant from which the foreign matter has been removed to fall downward. As shown in Fig. 8, a discharge port 204 is provided below the filter 203, and the coolant that has passed through the filter 203 is discharged from the discharge port 204. The coolant discharged from the discharge port 204 is sent to a tray 2106 of the coolant supply device 2100 described in Fig. 1, and is returned to the tank 2101.

[0057] Specifically, the bottom of the area cover 200 has a recess 205 capable of accommodating the filter 203, and a bottom surface 206 that is inclined downward toward the recess 205. The bottom surface 206 is provided around the recess 205, and the coolant liquid and chips that have fallen onto the bottom surface 206 flow toward the recess 205 along the inclination of the bottom surface 206. The filter 203 is fitted into the recess 205, and the coolant liquid and chips that have flowed toward the recess 205 are collected in the filter 203. Note that there is a gap between the filter 203 and the recess 205, and even if the filter 203 becomes clogged and the liquid does not flow easily, the liquid flows from the gap between the filter 203 and the recess 205 to the outlet 204, preventing the bottom of the processing area 120 from being submerged in the liquid.

[0058] As shown in FIG. 7(b), the filter 203 has a filter portion 203a, an outer frame 203b that houses the filter portion 203a, and a grip portion 203c that is provided on the front side of the outer frame 203b so as to protrude upward. The filter portion 203a is made of a material that allows liquid to pass through but does not allow solid matter such as cutting chips to pass through, such as a nonwoven fabric. The outer frame 203b houses the filter portion 203a therein and is fitted into the recess 205. The height of the outer frame 203b is the same as or lower than the depth of the recess 205, so that the coolant liquid flowing toward the recess 205 flows into the inside of the outer frame 203b.

[0059] The grip portion 203c is a portion that a user grasps with a hand or the like when attaching or detaching the filter 203 to or from the recess 205. The filter 203 needs to be periodically replaced or cleaned because foreign matter such as cutting chips accumulate in the filter 203. The grip portion 203c is provided on the front side of the outer frame 203b so as to protrude upward. Therefore, by opening the opening / closing door 102, a user can easily access the grip portion 203c, and can easily attach or detach the filter 203 to or from the recess 205. As a result, the maintainability of the filter 203 can be improved. The grip portion 203c is provided so as not to interfere with the opening / closing door 102 even when the opening / closing door 102 is closed.

[0060] [Machine frame] Here, the configuration of the frame 1 of the processing machine 100 described above will be further explained with reference to FIG. 9. As described above, the frame 1 has a first frame portion 3 and a second frame portion 4. The first frame portion 3 is provided with rails 23, 24 arranged in the X-axis direction. Furthermore, the second frame portion 4 is provided with rails 27, 28 arranged in the Y-axis direction. The rails 27, 28 guide the support mechanism 40 in the Y-axis direction, and this guide configuration is similar to the configuration that guides the first moving mechanism 10 along the rails 23, 24.

[0061] In this embodiment, the second frame portion 4 is connected to the lower end of the first frame portion 3 so as to extend in the Y-axis direction, and the first frame portion 3 and the second frame portion 4 are further connected by a reinforcing plate 29. That is, the reinforcing plate 29 is provided so as to connect the rear surface of the first frame portion 3 (the surface opposite the rails 23, 24, the rear surface) to the upper surface of the second frame portion 4. The reinforcing plate 29 is provided at both left and right ends of the second frame portion 4 so as not to interfere with the electrical unit 80, as shown in FIG.

[0062] The shape of the reinforcing plate 29 may be any shape appropriate for ensuring the rigidity of the frame 1. In this embodiment, the reinforcing plate 29 is a plate-like member formed so that the upper end of the connection part on the first frame part 3 side and the rear end of the connection part on the second frame part 4 side are connected by a straight line or curved line that is inclined downward as it goes from the first frame part 3 to the rear side. That is, when the connection part with the first frame part 3 is defined as the first side and the connection part with the second frame part 4 is defined as the second side, the reinforcing plate 29 has a shape in which the first side and the second side intersect at a right angle and the upper end of the first side and the rear end of the second side are connected by a straight line or curved line. The line connecting the upper end of the first side and the rear end of the second side may be composed of multiple curved lines or straight lines. In particular, it is preferable that the line connecting the upper end of the first side of the reinforcing plate 29 and the rear end of the second side has a curved part that is recessed inward (i.e., on the side approaching the first side and the second side). With this configuration, when the frame 1 is integrally formed by casting, it becomes easier to remove it from a mold.

[0063] In this embodiment, the frame 1 configured as described above is integrally molded. That is, the first frame portion 3, the second frame portion 4, the rails 23 and 24 in the X-axis direction, the rails 27 and 28 in the Y-axis direction, and the pair of reinforcing plates 29 are integrally formed by casting. This makes it easy to manufacture the frame 1, and also reduces the amount of material and the weight, and further reduces the cost of the frame 1. That is, if some or all of the members constituting the frame 1 are made separate and fixed with screws, the manufacturing process becomes more complicated by the amount of fixing work with screws. Also, when fixing with screws, the reinforcing plate is likely to be larger than in the case of integral molding as in this embodiment in order to ensure the rigidity of the frame 1. Therefore, the material of the frame 1 increases and the weight increases. As a result, the manufacturing cost increases. On the other hand, in this embodiment, the members constituting the frame 1 are all molded integrally, which makes it easier to ensure the rigidity of the frame 1, and as described above, the manufacturing cost can be reduced. At least one of the X-axis direction rails 23, 24, the Y-axis direction rails 27, 28, and the pair of reinforcing plates 29 may be provided integrally with the frame 1. In particular, if at least one of the X-axis direction rails 23, 24, and the Y-axis direction rails 27, 28 are provided integrally with the frame 1, manufacturing costs can be reduced. Furthermore, if at least one of the pair of reinforcing plates 29 is provided integrally with the frame 1, the rigidity of the frame 1 can be easily ensured.

[0064] [Prevention of leakage at the back of the area cover] Next, measures to be taken when the coolant leaks at the rear side of the area cover 200 will be described with reference to Figs. 10(a) to 12. As shown in Fig. 10(a), a through hole 207 is formed at the rear side of the area cover 200 so that the third moving mechanism 30 for moving the support mechanism 40 supporting the workpiece in the Y-axis direction penetrates through the through hole 207. A seal member 208 is provided between the case 33 of the third moving mechanism 30 and the through hole 207. The seal member 208 is a brush-like seal member such as a mohair seal, and can suppress leakage of chips and the like to the outside. For this reason, when the third moving mechanism 30 moves in the Y-axis direction, the coolant leaks.

[0065] Here, it is conceivable to use a seal member 208 with a sealing property that prevents the coolant from leaking, but in this case, resistance when the third moving mechanism 30 moves in the Y-axis direction becomes large, and the motor 32 for moving the third moving mechanism 30 becomes large. Therefore, in this embodiment, the seal member 208 prevents the cutting chips from leaking to the outside, and the coolant leaking through the through hole 207 is received by a receiving tray 209.

[0066] For this reason, in this embodiment, a tray 209 is disposed below a portion of the third movement mechanism 30 exposed on the far side of the area cover 200. The tray 209 has a shape long in the Y-axis direction so as to cover the movement range of the third movement mechanism 30 in the Y-axis direction. On the other hand, the width of the tray 209 in the X-axis direction is made smaller than that of the case 33. The case 33 is formed in a cylindrical shape, and the coolant liquid leaking along the case 33 falls from the lower end of the case 33. For this reason, even if the width of the tray 209 in the X-axis direction is smaller than that of the case 33 in the X-axis direction, the coolant liquid falling from the case 33 can be received as long as it is located below an area including the center of the case 33 in the X-axis direction.

[0067] As shown in Fig. 10(a) and Fig. 11(a), the rear end of the tray 209 is supported via a support part 211 on the upper surface of a support plate 210 that supports the area cover 200. As shown in Fig. 10(a), (b) and Fig. 12, the front end of the tray 209 is supported by a rear plate 212 on the rear side of the area cover 200. A through hole 212a is formed in the rear plate 212 through which the front end of the tray 209 can pass, and the front end of the tray 209 enters the inside of the area cover 200 through the through hole 212a and is supported by fitting into the through hole 212a. In addition, the tray 209 is supported in a state inclined downward as it approaches the area cover 200 side.

[0068] As shown in FIG. 11(b), the tray 209 has a vertical wall 209a at the end on the back side and at both ends in the left-right direction (X-axis direction), which prevents the coolant liquid that has fallen into the tray 209 from leaking from the back side and both sides in the left-right direction. On the other hand, the front end of the tray 209 is an opening 209b, and no vertical wall or the like is provided. Therefore, the coolant liquid that has fallen into the tray 209 can flow out from the front opening 209b. As described above, the front end of the tray 209 enters the inside of the area cover 200 through the through hole 212a, so the coolant liquid that flows out from the opening 209b is returned to the inside of the area cover 200. The front end of the tray 209 is provided with a locking portion 209c that is bent downward. As shown in FIG. 10(b), the locking portion 209c engages with the lower portion of the through-hole 212a of the rear plate 212, so that the receiving tray 209 does not inadvertently slip out of the through-hole 212a.

[0069] As shown in FIG. 10(b) and FIG. 12, a eaves portion 212b is provided above the through hole 212a of the back plate 212. The eaves portion 212b is provided so as to cover the upper and front sides of the front end of the tray 209 protruding from the through hole 212a. The eaves portion 212b does not cover the lower side of the front end of the tray 209. There is a gap between the eaves portion 212b and the front end of the tray 209, and the coolant flows down from the opening 209b at the front end of the tray 209 to the inside of the area cover 200 through this gap. By providing the eaves portion 212b in this way, it is made difficult for the coolant that splashes inside the area cover 200 during processing to reach the front end of the tray 209. This makes it possible to suppress the coolant from leaking to the outside through the tray 209. In this embodiment, the portion of the tray 209 that penetrates inside the area cover 200 is located below the machining area into which the workpiece is lowered, making it difficult for coolant liquid that splashes during machining to reach the tray 209.

[0070] [Roll-up cover] Next, the take-up cover (roll sheet) 300 covering the first opening 201 of the area cover 200 will be described with reference to Figs. 13 to 19(b). As described above, the first opening 201 is formed on the upper side of the area cover 200 as an opening through which the main shaft 11 can enter. In this embodiment, the take-up cover 300 covers the first opening 201 so that the coolant liquid that splashes during processing inside the area cover 200 does not leak from the first opening 201. As shown in Figs. 13 and 14, the take-up cover 300 is a sheet-like cover attached to the main shaft 11 so that the main shaft 11 can enter the inside of the area cover 200, which is the processing area side. The take-up cover 300 is a sheet made of resin such as PET (polyethylene terephthalate) and is a sheet made of a shape-retaining material that can retain the wound shape.

[0071] In this embodiment, since the spindle 11 moves in the X-axis direction as a predetermined direction, the first opening 201 is formed so as to be movable in the X-axis direction with the spindle 11 entering the machining area 120. The take-up cover 300 is provided inside the area cover 200 so as to cover the first opening 201. That is, the take-up cover 300 is disposed inside the area cover 200 so as to cover the first opening 201 from the inner surface of the top plate 213 in which the first opening 201 of the area cover 200 is formed.

[0072] When the main shaft 11 moves in the X-axis direction, the downstream side of the take-up cover 300 in the X-axis direction is taken up and the upstream side in the X-axis direction is pulled out, thereby covering the first opening 201 while allowing the main shaft 11 to move in the X-axis direction. That is, when the main shaft 11 moves to one side in the X-axis direction, one side of the take-up cover 300 in the X-axis direction is taken up and the other side in the X-axis direction is pulled out. On the other hand, when the main shaft 11 moves to the other side in the X-axis direction, the other side of the take-up cover 300 in the X-axis direction is taken up and one side in the X-axis direction is pulled out.

[0073] Next, the mounting structure of the take-up cover 300 to the main shaft 11 and the area cover 200 will be described with reference to Figs. 15 and 16. Figs. 15 and 16 are exploded perspective views of the mounting structure of the take-up cover 300 to the main shaft 11 and the area cover 200. First, the main shaft cover 301 is attached to the main shaft 11. The main shaft cover 301 covers the periphery of the main shaft 11 and is movable together with the main shaft 11 in the X-axis direction. Specifically, the main shaft cover 301 is formed with an engagement hole 301a through which the main shaft 11 is inserted and which engages with the main shaft 11 so that the main shaft 11 can move in the Z-axis direction. In addition, an engagement protrusion 301b is provided on the lower surface of the main shaft cover 301 when it is attached to the main shaft 11. The engagement protrusion 301b is formed in a cylindrical shape so as to cover the periphery of the engagement hole 301a.

[0074] On the other hand, the take-up cover 300 is composed of a pair of sheets 300a, 300b, which are attached to both ends of a guide stay 302 in the X-axis direction. The guide stay 302 as an engagement part is fixed to the sheets 300a, 300b by sandwiching the sheets 300a, 300b between the sheets 300a, 300b and mounting plates 303a, 303b attached to the lower surfaces of the ends of the sheets 300a, 300b, as shown in Fig. 16. The guide stay 302 and the mounting plates 303a, 303b are fixed with screws 302a.

[0075] That is, the mounting plates 303a, 303b are attached to the ends of the sheets 300a, 300b by, for example, double-sided tape. The mounting plates 303a, 303b and the sheets 300a, 300b each have a hole through which the screw 302a passes. The mounting plates 303a, 303b are, for example, stainless steel sheet metal. The ends of the sheets 300a, 300b are sandwiched between the mounting plates 303a, 303b and the guide stay 302, and the mounting plates 303a, 303b and the guide stay 302 are fixed by the screws 302a, so that the sheets 300a, 300b are fixed to both sides of the guide stay 302.

[0076] The guide stay 302 is formed with a stay engagement hole 302c that can engage with the engagement protrusion 301b of the spindle cover 301 described above. The stay engagement hole 302c is formed so that the spindle 11 is inserted therethrough and can move in the Z-axis direction. The sheets 300a, 300b are fixed to both sides of the stay engagement hole 302c so that the sheets 300a, 300b and the mounting plates 303a, 303b do not impede the movement of the spindle 11 in the Z-axis direction.

[0077] The spindle cover 301 is disposed above the top plate 213 in which the first opening 201 is formed, and the engagement protrusion 301b enters the first opening 201 and protrudes toward the machining area 120 side (i.e., downward) beyond the first opening 201. The outer diameter of the engagement protrusion 301b is smaller than the width of the first opening 201 in the Y-axis direction. Therefore, the engagement protrusion 301b is movable in the X-axis direction within the first opening 201. The guide stay 302 is disposed on the inner side (lower side) of the top plate 213, and engages with the spindle cover 301 by fitting the engagement protrusion 301b protruding from the first opening 201 into the inner side.

[0078] The width of the guide stay 302 and the seats 300a, 300b in the Y-axis direction is larger than the width of the first opening 201 in the Y-axis direction. Therefore, the guide stay 302 and the seats 300a, 300b contact or are close to the periphery of the first opening 201 on the inner surface of the top plate 213. In this manner, the spindle cover 301, the guide stay 302, and the seats 300a, 300b are arranged to sandwich the top plate 213 from above and below.

[0079] In this embodiment, the take-up cover 300, which is made up of the sheets 300a and 300b, has pressing plates 304a and 304b as pressing members that press the take-up cover 300, which is made up of the sheets 300a and 300b, against the inside of the top plate 213 of the area cover 200. The pressing plates 304a and 304b are plate-shaped members that are arranged along the X-axis direction. The take-up cover 300 is pressed down on both sides in the Y-axis direction, which is the width direction perpendicular to the X-axis direction, by the pressing plates 304a and 304b, respectively.

[0080] The pressing plates 304a and 304b are made of resin and are temporarily fixed by elastically hooking them onto roller brackets 305a and 305b, which will be described later. The roller brackets 305a and 305b are attached to the upper plate 213 so that a part of them is exposed on the lower side of the upper plate 213, as will be described later. The pressing plates 304a and 304b are fixed to the upper plate 213 of the area cover 200 by screws 304c in a state where they are temporarily fixed to the roller brackets 305a and 305b in this way. If the pressing plates 304a and 304b are not temporarily fixed in this way, the pressing plates 304a and 304b will have to be screwed to the upper plate 213 while holding the winding cover 300 by hand, which is not easy to work with. For this reason, in this embodiment, the pressing plates 304a and 304b are temporarily fixed to the roller brackets 305a and 305b before being fixed to the upper plate 213.

[0081] The positions where the pressing plates 304a and 304b are fixed to the top plate 213 by the screws 304c are on both sides in the width direction (Y-axis direction) of the first opening 201 and on both sides in the width direction of the take-up cover 300. Therefore, the take-up cover 300 slides against the lower surface of the top plate 213 on the inner side in the width direction of the fixing parts of the pressing plates 304a and 304b to the top plate 213.

[0082] Here, guide stays 302 and mounting plates 303a and 303b are attached to sheets 300a and 300b constituting the winding cover 300, respectively. Therefore, the thickness of the portion of the winding cover 300 to which the guide stays 302 and mounting plates 303a and 303b are attached differs from that of the other portions. In this embodiment, a gap is provided between the pressing plates 304a and 304b and the top plate 213 so that the portion to which the guide stays 302 and mounting plates 303a and 303b are attached can move between the pressing plates 304a and 304b and the top plate 213.

[0083] On the other hand, the sheets 300a and 300b constituting the take-up cover 300 have their widthwise ends warped upward. That is, the ends of the sheets 300a and 300b are located closer to the top plate 213 (upper side) than the center in the widthwise direction. Therefore, even if there is a gap between the pressing plates 304a and 304b and the top plate 213 as described above, the sheets 300a and 300b are pressed down by the pressing plates 304a and 304b, so that the widthwise ends of the sheets 300a and 300b come into contact with the top plate 213. For this reason, in this embodiment, the guide stays 302 and the mounting plates 303a and 303b are narrower than the sheets 300a and 300b, allowing both widthwise ends of the sheets 300a and 300b to warp upward.

[0084] Roller brackets 305a, 305b as roller support parts are fixed to the outside of area cover 200 and support rollers 306 (see FIG. 17, etc.) that wind up take-up cover 300. Third openings 214a, 214b are formed on both sides of first opening 201 in the X-axis direction of upper plate 213 so that parts of roller brackets 305a, 305b can be exposed below upper plate 213. As shown in FIG. 17, roller brackets 305a, 305b have outer frame 307 and support shafts 308 that support rollers 306 for winding up sheets 300a, 300b of take-up cover 300 inside outer frame 307.

[0085] The outer frame 307 is wound around the roller 306 and covers the periphery of the take-up cover 300. Specifically, the outer frame 307 is open on the inside in the X-axis direction, which is the winding side and the pull-out side of the take-up cover 300, and is formed to cover at least the upper side of the roller 306 and the outside in the X-axis direction. Therefore, even if coolant liquid or cutting chips are attached to the take-up cover 300, the outer frame 307 can suppress the coolant liquid and cutting chips from scattering. In addition, the support shaft 308 is a shaft portion formed to protrude inward in the width direction from both ends of the outer frame 307 in the width direction, and is inserted into both ends of the support hole 306a of the roller 306. As a result, the roller 306 is rotatably supported by the support shaft 308.

[0086] As described above, the roll-up cover 300 is a sheet made of a shape-retaining material capable of retaining the rolled-up shape, so that when the roll-up cover 300 moves together with the main shaft 11, the roll-up cover 300 is automatically wound around the roller 306 by deforming to return to the rolled-up shape on the roll-up side. On the other hand, on the pulled-out side, the roll-up cover 300 is pulled from the rolled-up shape by the force of the roll-up cover 300 moving together with the main shaft 11, and is pulled out while deforming into a substantially flat shape. Therefore, in this embodiment, a motor or drive transmission unit for winding up the roll-up cover 300 is not required, and costs can be reduced. Note that a motor or drive transmission unit for winding up the roll-up cover 300 may be provided.

[0087] As shown in Fig. 17, the roller brackets 305a and 305b have a fixing plate portion 309 for fixing to the top plate 213. The roller brackets 305a and 305b are fixed to the upper side of the top plate 213 by fixing the fixing plate portion 309 to the top plate 213 with a screw 309a. As shown in Figs. 17 and 18, the roller 306 is disposed above the top plate 213, and the take-up cover 300 is taken up by the roller 306 from below the top plate 213 through the third openings 214a and 214b, or is pulled out from the roller 306.

[0088] In this embodiment, the roller 306 is supported by the roller brackets 305a and 305b on the outside of the area cover 200. If the roller 306 is disposed on the inside of the area cover 200 (i.e., below the upper plate 213) like the winding cover 300, when the winding cover 300 is stretched along the X-axis direction by the rollers 306 on both sides, a gap is likely to occur between the winding cover 300 and the upper plate 213 because the roller 306 is located on the inside of the area cover 200. On the other hand, if the roller 306 is supported above the upper plate 213, when the winding cover 300 is stretched along the X-axis direction by the rollers 306 on both sides, the end of the winding cover 300 is pulled upward by the rollers 306, so that a gap is unlikely to occur between the winding cover 300 and the upper plate 213, and the sealing performance by the winding cover 300 can be improved.

[0089] As shown in FIG. 18, the roller brackets 305a and 305b are provided with scrapers 310 as sliding contact members that come into sliding contact with the surface of the take-up cover 300 on the processing area 120 side inside the area cover 200. At least the portion of the scraper 310 that comes into contact with the take-up cover 300 is made of an elastic material such as rubber, and is disposed between the roller 306 and the lower end 307a of the outer frame 307. Specifically, the scraper 310 is provided so as to protrude from the lower end 307a toward the lower surface of the take-up cover 300 that is taken up by the roller 306, and the tip of the scraper 310 comes into contact with the lower surface of the take-up cover 300. As a result, when the take-up cover 300 is taken up, the lower surface of the take-up cover 300 comes into sliding contact with the scraper 310, and the coolant liquid and chips adhering to the lower surface of the take-up cover 300 can be scraped off.

[0090] The scraper 310 is disposed below the upper plate 213 and comes into sliding contact with the lower surface of the take-up cover 300 before the take-up cover 300 is taken up by the roller 306. Therefore, the coolant and chips scraped off by the scraper 310 fall into the processing area 120 below. In addition, since the take-up cover 300 is taken up by the roller 306 cleaned by the scraper 310, it is possible to prevent the coolant and chips from remaining on the portion taken up by the roller 306. In this embodiment, as described above, the portion supporting the roller 306 is located above the upper plate 213. Therefore, if the coolant and chips remain on the portion taken up by the roller 306, there is a risk that the coolant and chips will leak above the upper plate 213, i.e., outside the area cover 200. In this embodiment, the take-up cover 300 is cleaned by the scraper 310 before being taken up by the roller 306, so that leakage of coolant and chips to the outside through the take-up portion of the take-up cover 300 can be suppressed.

[0091] As shown in Fig. 17, Fig. 19(a) and Fig. 19(b), a plurality of first grooves 311 and second grooves 312 are formed on the surfaces of the pressing plates 304a and 304b on the side of the upper plate 213. Fig. 19(a) is a perspective view of a state in which the roll-up cover 300 is wound around the roller 306 at the end positions in the X-axis direction of the pressing plates 304a and 304b. Fig. 19(b) is a perspective view of a state in which the roll-up cover 300 in Fig. 19(a) is omitted in order to make the first grooves 311 and the second grooves 312 easier to see.

[0092] The first grooves 311 are provided in the widthwise inner portions of the pressure plates 304a and 304b, where the take-up cover 300 slides. That is, the first grooves 311 are provided in the area where the take-up cover 300 and the pressure plates 304a and 304b overlap when viewed from the Z-axis direction. The first grooves 311 are each formed along the X-axis direction. The first grooves 311 are formed to reduce the sliding resistance between the take-up cover 300 and the pressure plates 304a and 304b, and to facilitate smooth movement of the take-up cover 300.

[0093] The second groove portion 312 is disposed on the outer side in the width direction than the multiple first groove portions 311. The second groove portion 312 is formed along the X-axis direction, and furthermore, the bottom surface of the groove is inclined downward as it approaches one side in the X-axis direction. In other words, the second groove portion 312 is inclined. In addition, one end of the second groove portion 312 on the X-axis direction is open. Therefore, the coolant liquid and chips that accumulate in the second groove portion 312 flow along the gradient and flow out from the opening on one side in the X-axis direction.

[0094] Further, the second groove portion 312 is deeper than the first groove portion 311, and the upper end of the groove is lower than the upper end of the groove of the adjacent first groove portion 311. When the take-up cover 300 moves in the X-axis direction together with the main shaft 11, the take-up cover 300 slides against the first groove portions 311, so that the coolant liquid and chips tend to accumulate in the first groove portions 311. When the take-up cover 300 further slides against the first groove portions 311, the coolant liquid and chips accumulated in the first groove portions 311 move outward in the width direction in accordance with this sliding action. The coolant liquid and chips are then pushed into the second groove portion 312 arranged on the outer side of the first groove portions 311 in the width direction. Since the second groove portion 312 has a gradient as described above, the coolant liquid and chips pushed into the second groove portion 312 flow along the gradient and are discharged from the opening of the second groove portion 312. Since the pressing plates 304 a and 304 b are disposed inside the area cover 200 , the coolant liquid and chips discharged from the second groove portion 312 fall inside the area cover 200 .

[0095] In this embodiment, the first grooves 311 and the second grooves 312 are provided in the pressure plates 304a and 304b that slide against the take-up cover 300, thereby reducing the sliding resistance of the take-up cover 300 and discharging the coolant and chips accumulated in the pressure plates 304a and 304b. This makes it possible to suppress a decrease in the life span of the take-up cover 300 and the pressure plates 304a and 304b, and to reduce the frequency of maintenance of the sliding parts between the take-up cover 300 and the pressure plates 304a and 304b.

[0096] In this manner, in this embodiment, the take-up cover 300 is disposed inside the area cover 200, and is pressed against the inside of the area cover 200 by the pressing plates 304a, 304b. This makes it possible to prevent the coolant and chips from leaking to the outside, compared to when the take-up cover 300 is disposed outside the area cover 200. That is, since the take-up cover 300 slides inside the area cover 200, the coolant and chips adhering to the take-up cover 300 drop to the inside of the area cover 200, and are less likely to leak to the outside of the area cover 200.

[0097] In addition, since the underside of the winding cover 300 is rubbed by the scraper 310 before it reaches the outside of the area cover 200, leakage of coolant and chips adhering to the underside of the winding cover 300 to the outside can be further suppressed. Furthermore, since the surfaces of the pressing plates 304a and 304b that rub against the winding cover 300 are provided with a plurality of first grooves 311 and second grooves 312, the sliding resistance of the winding cover 300 can be suppressed, and the coolant and chips accumulated during sliding against the winding cover 300 can be smoothly discharged. As a result, the lifespan of the winding cover 300 and the pressing plates 304a and 304b can be suppressed, and the frequency of maintenance can be reduced.

[0098] The disclosure of this embodiment also includes the following configuration. (Configuration 1) A spindle that holds a tool; A moving unit that moves the main shaft in a predetermined direction; an area cover for covering a machining area for machining a workpiece with a tool held by the spindle, the area cover having an opening formed so that the spindle can move in the predetermined direction while inserted into the machining area; a sheet-like take-up cover attached to the main shaft so that the main shaft can enter the inside of the area cover, which is the processing area side, and is provided on the inside of the area cover so as to cover the opening, and when the main shaft moves in the predetermined direction, the downstream side of the take-up cover in the predetermined direction is taken up and the upstream side of the take-up cover in the predetermined direction is pulled out, thereby covering the opening while allowing the main shaft to move in the predetermined direction; A pressing member that presses the winding cover against the inside of the area cover. A processing device characterized by: (Configuration 2) a spindle cover that covers the periphery of the spindle and is movable together with the spindle in the predetermined direction; The processing device according to configuration 1, further comprising an engagement portion attached to the take-up cover and engaging with the main shaft cover. (Configuration 3) the pressing member is a plate-shaped pressing plate arranged along the predetermined direction, The processing device according to configuration 1 or 2, wherein the take-up cover is pressed down on both sides in a width direction perpendicular to the predetermined direction by the pressing plates. (Configuration 4) a roller support portion fixed to the outside of the area cover and supporting a roller that winds up the winding cover; The processing device according to any one of configurations 1 to 3, further comprising a sliding member provided in the roller support portion and in sliding contact with the surface of the winding cover on the processing area side on the inside of the area cover. (Configuration 5) 5. The processing device according to any one of configurations 1 to 4, wherein the winding cover is a sheet made of a shape-retaining material capable of retaining the wound shape. (Configuration 6) 6. The processing apparatus according to any one of configurations 1 to 5, further comprising a supply unit that supplies a cooling liquid toward the workpiece in the processing area. (Configuration 7) the opening is a first opening, the area cover has a second opening at a position different from the first opening, an opening / closing door that can open and close the second opening by rotating around a rotation center provided on a lower end side in a vertical direction with respect to the area cover; The processing apparatus according to configuration 6, wherein the opening / closing door is arranged so that its lower vertical end when the opening / closing door is closed is positioned vertically above a portion of the area cover when the opening / closing door is open. (Configuration 8) The processing apparatus according to configuration 7, characterized in that the opening and closing door is provided at the lower end portion, and has an inclined portion that slopes vertically downward from the opening and closing door side toward the inside of the area cover when the opening and closing door is closed, and slopes vertically downward from the area cover side toward the center of the opening and closing door when the opening and closing door is open. (Configuration 9) The processing apparatus according to configuration 7 or 8, wherein the opening / closing door has a contact portion provided at the lower end portion and contacts a part of the area cover when the opening / closing door is closed. [Explanation of symbols]

[0099] 11...Spindle 20... Second moving mechanism (moving part) 102 Opening and closing door 106....Bending part (lower end) 106a...First slope part (slope part) 107...Contact part 110 Hinge (rotation center) 200···Area Coverage 201... First opening (opening) 202...Second opening 300···Roller cover 301···Spindle cover 302 Guide stay (engagement part) 304a, 304b: Pressing plate (pressing member) 305a, 305b... Roller bracket (roller support part) 306...Laura 310: scraper 310 (sliding contact member) 2002 Coolant discharge section (supply section)

Claims

1. A spindle that holds a tool; A moving unit that moves the main shaft in a predetermined direction; an area cover for covering a machining area for machining a workpiece with a tool held by the spindle, the area cover having an opening formed so that the spindle can move in the predetermined direction while inserted into the machining area; a sheet-like take-up cover attached to the main shaft so that the main shaft can enter the inside of the area cover, which is the processing area side, and is provided on the inside of the area cover so as to cover the opening, and when the main shaft moves in the predetermined direction, the downstream side of the take-up cover in the predetermined direction is taken up and the upstream side of the take-up cover in the predetermined direction is pulled out, thereby covering the opening while allowing the main shaft to move in the predetermined direction; a pressing member that presses the winding cover against the inside of the area cover.

2. a spindle cover that covers the periphery of the spindle and is movable together with the spindle in the predetermined direction; 2. The processing device according to claim 1, further comprising an engagement portion attached to the take-up cover and adapted to engage with the main shaft cover.

3. the pressing member is a plate-shaped pressing plate arranged along the predetermined direction, 2. The processing device according to claim 1, wherein the take-up cover is pressed down on both sides in a width direction perpendicular to the predetermined direction by the pressing plates.

4. a roller support portion fixed to the outside of the area cover and supporting a roller that winds up the winding cover; 2. The processing device according to claim 1, further comprising a sliding member provided on the roller support portion and in sliding contact with a surface of the take-up cover facing the processing area on the inner side of the area cover.

5. 2. The processing device according to claim 1, wherein the winding cover is a sheet made of a shape-retaining material capable of retaining the wound shape.

6. The processing apparatus according to claim 1 , further comprising a supply unit for supplying a cooling liquid toward the workpiece in the processing area.

7. the opening is a first opening, the area cover has a second opening at a position different from the first opening, an opening / closing door that can open and close the second opening by rotating around a rotation center provided on a lower end side in a vertical direction with respect to the area cover; The processing apparatus according to claim 6, characterized in that the opening and closing door is arranged so that its vertical lower end when the opening and closing door is closed is positioned vertically above a portion of the area cover when the opening and closing door is open.

8. The processing apparatus according to claim 7, characterized in that the opening and closing door has an inclined portion provided at the lower end portion, which slopes vertically downward from the opening and closing door side toward the inside of the area cover when the opening and closing door is closed, and which slopes vertically downward from the area cover side toward the center of the opening and closing door when the opening and closing door is open.

9. The processing apparatus according to claim 7 , wherein the opening / closing door has a contact portion provided at the lower end portion and contacting a part of the area cover when the opening / closing door is closed.

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