Control panels and machine tools

Abstract

To provide a control board and a machine tool that are able to prevent a blower from catching foreign matter.SOLUTION: A control board 20 houses electric components that control a machine tool inside a storage box 21. The control board 20 is provided, on a left wall 202 of the storage box 21, with a heat dissipation mechanism, a blower 50 and a cover 30. A part of the heat dissipation mechanism is disposed inside the storage box 21 and is connected to the electric components. The blower 50 is fixed to a left side of the left wall 202 of the control board 20 via a housing. The blower 50 is located below the heat dissipation mechanism. The blower 50 blows air to the heat dissipation mechanism via the housing. The cover 30 covers an outer side of the blower 50. A left wall 301 of the cover 30 has an opening 31 which is an air inlet of the blower 50. The opening 31 is provided around a facing portion 310 which faces the blower 50 in the left wall 301.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a control panel and a machine tool. [Background technology]

[0002] The machine tool described in Patent Document 1 includes a control panel. The control panel houses electrical components. The cooling fin section is provided on the side of the control panel and cools the electrical components housed inside the control panel. The fin enclosure covers the cooling fin section. The fan draws air into the fin enclosure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-221609 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to prevent rod-shaped foreign objects (such as a screwdriver) from being sucked into the fan of the above-mentioned machine tools, a mesh-like fan guard is sometimes placed at the intake port where the fan takes in air. Even in this case, rod-shaped foreign objects can sometimes get in through gaps in the mesh and get sucked into the fan.

[0005] An object of the present invention is to provide a control panel and a machine tool that can prevent foreign objects from being drawn into the blower. [Means for solving the problem]

[0006] The control panel of a first aspect of the present invention comprises electrical components for controlling a machine tool, a storage box for storing the electrical components, a blower arranged outside a specified wall of the storage box, and a cover for covering the outside of the blower, wherein the cover has an opening around an opposing portion facing the blower.

[0007] Since the control panel of the first embodiment has the openings located around the opposing portion, even if a rod-shaped foreign object enters the inside of the cover through the openings, the blower can be prevented from sucking in the foreign object.

[0008] In a first aspect, the control panel may further include a heat dissipation mechanism connected to the electrical component and having a portion disposed outside the predetermined wall, the blower may be disposed side by side with the heat dissipation mechanism in a predetermined direction parallel to the predetermined wall, and the opening may be located at a position other than a pinched position between the blower and the heat dissipation mechanism in the predetermined direction in which the blower and the heat dissipation mechanism are aligned. Because the opening of the control panel is not at a pinched position, interference between the wind taken in by the blower through the opening and the wind sent from the blower to the heat dissipation mechanism can be suppressed. Therefore, the control panel can effectively dissipate heat from the electrical component through the heat dissipation mechanism.

[0009] In the first aspect, the opening may be located on at least one of the one side and the other side of the opposing portion in a cross direction that crosses the predetermined direction. Since the control panel has an opening on at least one of the one side and the other side of the opposing portion in the cross direction, the cover can be made compact.

[0010] In the first aspect, the cover may cover the outside of the heat dissipation mechanism and further have an exhaust port that opens the cover on the opposite side of the heat dissipation mechanism from the blower in the predetermined direction. In the control panel, the blower blows air through the exhaust port on the opposite side of the heat dissipation mechanism, and the air that passes through the heat dissipation mechanism is exhausted to the outside of the cover. Since the temperature inside the cover does not rise, the control panel can effectively release heat from the electrical components through the heat dissipation mechanism.

[0011] A machine tool according to a second aspect of the present invention is characterized in that it includes a control panel according to any one of claims 1 to 4. The machine tool of the second aspect can achieve the same effects as the machine tool of the first aspect. [Brief description of the drawings]

[0012] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 2 is a left side view of the control panel 20 with the cover 30 removed. [Diagram 5] 4 is a cross-sectional view taken along line II in FIG. 3 . [Figure 6] FIG. 6 is a partially enlarged view of the periphery of the housing 40 shown in FIG. 5. [Figure 7] FIG. 4 is a perspective view of the housing 40 as seen obliquely from below and to the left. [Figure 8] FIG. 4 is a perspective view of the housing 40 from diagonally above and to the left. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An embodiment of the present invention will be described below. In the following description, the left / right, front / back, and up / down directions shown by arrows in the drawings will be used. The left / right direction, front / back direction, and up / down direction of machine tool 1 are the X-axis direction, Y-axis direction, and Z-axis direction of machine tool 1, respectively.

[0014] The structure of machine tool 1 will be described with reference to Figure 1. Machine tool 1 is a vertical machine tool with a spindle (not shown) extending in the Z-axis direction. Machine tool 1 comprises a base 2, a column 5, a spindle head 7, a main body cover 3, and a control panel 20. Base 2 is an iron base. Column 5 is erected at the rear of the upper part of base 2. A Z-axis movement mechanism (not shown) is located in front of column 5. Spindle head 7 is located in front of the Z-axis movement mechanism. Spindle head 7 can be moved in the Z-axis direction by the Z-axis movement mechanism.

[0015] The spindle head 7 supports the spindle so that it can rotate around a rotation axis parallel to the Z-axis direction. A tool (not shown) is attached to the spindle, and it performs cutting and other processes on a workpiece (not shown) fixed to the top surface of a work table (not shown). The work table is located at the front and upper part of the base 2. The main body cover 3 is fixed to the top of the base 2, and surrounds the spindle and the work table.

[0016] The structure of the control panel 20 will be described with reference to Figs. 2 to 8. The control panel 20 includes a storage box 21. The storage box 21 is substantially rectangular and includes a front wall 201 and a left wall 202. The storage box 21 includes a right attachment portion 22 and a left attachment portion 23 on the outside of the front wall 201. The right attachment portion 22 is disposed on the right side of the front wall 201, and the left attachment portion 23 is disposed on the left side of the front wall 201. The right attachment portion 22 and the left attachment portion 23 extend in the vertical direction and protrude forward from the front wall 201. The right attachment portion 22 and the left attachment portion 23 of the storage box 21 are attached and fixed to the rear of the column 5. The storage box 21 stores various electrical components that control the machine tool 1. The various electrical components include, for example, an input / output board 93 (see Fig. 5), a control board 94 (see Fig. 5), a DC switching power supply, a breaker, an inverter, a wiring duct, a servo amplifier, and the like.

[0017] The storage box 21 has a door 203 on the opposite side to the column 5. For example, when inspecting the control panel 20, an operator opens the door 203 and inspects, replaces, repairs, etc., various electrical components stored in the storage box 21. The door 203 has a gripping part 24 on the lower left side that is gripped by the operator when locking and unlocking the door 203 and opening the door 203.

[0018] 2 to 4, the control panel 20 has a cover 30, a heat dissipation mechanism 90, a housing 40, an upper cover 60, and an electric wire insertion portion 70 on the left wall 202. The cover 30 covers the periphery of the heat dissipation mechanism 90, the housing 40, and the blower 50 on the outside of the storage box 21 (see FIGS. 3 and 4).

[0019] The cover 30 has a flat left wall 301, a rear wall 302, a front wall 303, and fixing portions 304 and 305. The left wall 301 extends in the up-down and front-rear directions. The rear wall 302 protrudes to the right from the rear end of the left wall 301, and the front wall 303 protrudes to the right from the front end of the left wall 301. The fixing portion 304 protrudes rearward from the right end of the rear wall 302, and the fixing portion 305 protrudes forward from the right end of the front wall 303. The fixing portions 304 and 305 of the cover 30 are attached and fixed to the center of the left wall 202 of the storage box 21.

[0020] The cover 30 has a plurality of openings 31 extending in the up-down direction and penetrating in the left-right direction in the lower part of the left wall 301. The plurality of openings 31 are air intakes through which the blower 50 described below takes in air. The openings 31 are located in the lower part of the left wall 301 around an opposing portion 310 that faces the blower 50 (see Figures 3 and 6). In this embodiment, the plurality of openings 31 are located on the front and rear sides of the opposing portion 310, respectively. The openings 31 located on the rear side of the opposing portion 310 are called rear openings 311, and the openings 31 located on the front side of the opposing portion 310 are called front openings 312.

[0021] An upper portion of the left wall 301 has a plurality of exhaust ports 321 extending in the front-rear direction and penetrating in the left-right direction. An upper portion of the rear wall 302 and the front wall 303 has a plurality of exhaust ports 322, 323 (see FIG. 5) extending in the left-right direction and penetrating in the front-rear direction. The plurality of exhaust ports 321-323 are located above an external heat dissipation mechanism 901 described later.

[0022] 4 and 5, the heat dissipation mechanism 90 is disposed in the center of the left wall 202. The heat dissipation mechanism 90 is a heat sink equipped with multiple cooling fins extending in the up-down and left-right directions. The heat dissipation mechanism 90 is disposed penetrating the center of the left wall 202 in the left-right direction. The heat dissipation mechanism 90 has an external heat dissipation mechanism 901 and an internal heat dissipation mechanism 902. The external heat dissipation mechanism 901 is disposed outside the storage box 21, and the internal heat dissipation mechanism 902 is disposed inside the storage box 21. The internal heat dissipation mechanism 902 is connected to the electrical components stored in the storage box 21.

[0023] 4 and 6 to 8, the housing 40 has a substantially rectangular parallelepiped shape and is arranged outside the storage box 21 and below the external heat dissipation mechanism 901. The housing 40 has walls 401, 403 to 405, fixing portions 406 to 408, a hollow portion 43, a first opening 41, a second opening 42, an intersecting wall portion 44, and a plug 46.

[0024] The wall portions 401, 403-405 and the fixing portions 406-408 are flat. The hollow portion 43 is disposed inside the area surrounded by the wall portions 401, 403-405. The wall portion 401 extends in the up-down and front-rear directions. It is disposed to the left of the external heat dissipation mechanism 901 in the left-right direction (see FIG. 6). The first opening 41 opens in the left-right direction at the center of the wall portion 401 and communicates with the hollow portion 43. The blower 50, which will be described later, is fixed to the left side of the wall portion 401 so as to cover the first opening 41.

[0025] Wall portion 403 protrudes to the right from the rear end of wall portion 401, wall portion 404 protrudes to the right from the front end of wall portion 401, and wall portion 405 protrudes to the right from the lower end of wall portion 401. Second opening 42 is disposed inside the area surrounded by the upper ends of walls 401, 403, and 404. Second opening 42 opens on the heat dissipation mechanism 90 side of housing 40 and communicates with hollow portion 43. Second opening 42 is located above the lower end of off-board heat dissipation mechanism 901 and passes through the lower end of off-board heat dissipation mechanism 901.

[0026] Fixed portion 406 protrudes rearward from the right end of wall portion 403, fixed portion 407 protrudes forward from the right end of wall portion 404, and fixed portion 408 protrudes downward from the front end of wall portion 405. Fixed portions 406 to 408 of housing 40 are attached and fixed to left wall 202 of storage box 21.

[0027] The cross wall portion 44 protrudes leftward from the upper end of the wall portion 401 and is a flat plate extending in the front-rear direction. The cross wall portion 44 extends leftward to the vicinity of the left wall 301 of the cover 30 (see FIG. 6). The rear end of the cross wall portion 44 is located rearward of the rear end of the wall portion 401, and the front end of the cross wall portion 44 is located forward of the front end of the wall portion 401. The wall portion 405 has a hole 45 at its rear that opens in the vertical direction and communicates with the hollow portion 43. The inner wall of the hole 45 is threaded. The plug 46 is a male screw that screws into the threads of the hole 45 to close the hole 45.

[0028] The blower 50 is, for example, an axial flow fan. A protective wire mesh 51 is disposed at the left end of the blower 50. The protective wire mesh 51 prevents relatively large foreign objects from entering the inside of the blower 50. The blower 50 takes in surrounding air and blows it to the right.

[0029] The upper cover 60 is disposed so as to cover the upper side of the cover 30. There is a gap between the upper cover 60 and the cover 30 in the vertical direction. The upper cover 60 is a plate-like shape that protrudes in the horizontal direction from the left wall 202 of the storage box 21, then bends in the vertical direction and extends in the front-rear direction. The electric wire insertion portion 70 has an insertion hole (not shown) that penetrates the left wall 202 in the horizontal direction, and holds electric wires that electrically connect the electrical components inside the storage box 21 to external devices by inserting them therethrough. The upper cover 60 supports the electric wires.

[0030] The air flow in the cover 30 will be described. When the machine tool 1 is in operation, various electrical components inside the storage box 21 generate heat, so the heat dissipation mechanism 90 drives the fan 50 to release the heat, thereby cooling the electrical components. The fan 50 takes in air from outside the cover 30 through the multiple openings 31 of the cover 30, and blows it to the right. The wind blown by the fan 50 flows into the hollow portion 43 through the first opening 41, and flows to the outside of the housing 40 from the second opening 42.

[0031] The wind that has flowed outside the housing 40 flows upward and passes through the inside of the external heat dissipation mechanism 901. At this time, the heat dissipation mechanism 90 releases heat due to the wind blown by the blower 50, and cools the electrical components inside the storage box 21 connected to the heat dissipation mechanism 90. The wind that has passed through the inside of the external heat dissipation mechanism 901 flows to the outside of the cover 30 through the multiple exhaust ports 321-323 and the gap between the upper cover 60 and the cover 30. Some of the wind that has flowed to the outside of the housing 40 may wind back toward the housing 40, but the cross wall portion 44 prevents the blower 50 from taking in the wind that has winded back toward the housing 40 again.

[0032] As described above, the control panel 20 is disposed behind the column 5 in the machine tool 1. The control panel 20 includes a storage box 21. The storage box 21 stores electrical components such as an input / output board 93 and a control board 94 for controlling the machine tool 1. The control panel 20 has a heat dissipation mechanism 90, a blower 50, and a cover 30 disposed on a left wall 202 of the storage box 21. Of the heat dissipation mechanism 90, an internal heat dissipation mechanism 902 disposed inside the storage box 21 is connected to the electrical components. The blower 50 is fixed to the left of the left wall 202 via a housing 40. The blower 50 is located below an external heat dissipation mechanism 901 disposed outside the storage box 21. The blower 50 blows air to the external heat dissipation mechanism 901 via the housing 40. The cover 30 covers the outside of the blower 50. The cover 30 has an opening 31 which is an air intake port for the blower 50. Opening 31 is located around opposing portion 310 of left wall 301 that faces blower 50. Therefore, even if a rod-shaped foreign object enters cover 30 from outside through opening 31, control panel 20 can prevent blower 50 from sucking in the foreign object.

[0033] In the control panel 20, a front opening 312 and a rear opening 311 are disposed on the front and rear sides, respectively, of the facing portion 310. Since the front opening 312 and the rear opening 311 are disposed in front and rear positions within the periphery of the facing portion 310 that intersect with the vertical direction in which the blower 50 and the heat dissipation mechanism 90 are aligned, the control panel 20 can have a compact cover 30.

[0034] In the above embodiment, the input / output board 93 and the control board 94 are examples of electrical components of the present invention. The left wall 202 is an example of a predetermined wall. The up-down direction is an example of a predetermined direction. The front-rear direction is an example of a crossing direction.

[0035] The present invention can be modified in various ways from the above embodiment. The various modified examples described below can be combined with each other as long as no contradiction occurs. For example, the machine tool 1 in the above embodiment is a vertical machine tool with a spindle extending in the Z-axis direction, but the present invention can also be applied to a horizontal machine tool with a spindle extending horizontally.

[0036] The heat dissipation mechanism 90, the blower 50, and the cover 30 may be disposed on an outer wall of the storage box 21 other than the left wall 202. The blower 50 and the heat dissipation mechanism 90 may be disposed on different outer walls of the storage box 21. In this case, the control panel 20 may be provided with a duct through which the air blown by the blower 50 flows to the heat dissipation mechanism 90. The cover 30 only needs to cover the blower 50, and does not need to cover the heat dissipation mechanism 90.

[0037] The opening 31 may be disposed around the opposing portion 310 in the left wall 301, and the position of the opening 31 may be changed in various ways. For example, the opening 31 may be disposed at a position other than the sandwiched position (above the opposing portion 310) between the blower 50 and the heat dissipation mechanism 90 in the vertical direction. That is, the opening 31 may be disposed below the opposing portion 310. When the cover 30 does not dispose the opening 31 at the sandwiched position, the control panel 20 can suppress interference between the wind taken in by the blower 50 through the opening 31 and the wind sent from the blower 50 toward the heat dissipation mechanism 90. Therefore, the control panel 20 can effectively release heat of the electrical components from the heat dissipation mechanism 90 by the wind sent by the blower 50.

[0038] In the above embodiment, the cover 30 has the rear opening 311 disposed on the rear side of the opposing portion 310 and the front opening 312 disposed on the front side of the opposing portion 310, but at least one of the rear opening 311 and the front opening 312 may be provided. The cover 30 may have the air intake port of the blower 50 disposed at a position other than the opening 31 in the left wall 301. For example, the cover 30 may have the air intake port of the blower 50 disposed in the rear wall 302 and the lower part of the front wall 303.

[0039] The cover 30 does not need to be provided with multiple exhaust ports 321-323. In this case, it is sufficient that the air blown by the blower 50 is discharged to the outside of the cover 30 through a gap between the upper cover 60 and the cover 30 or the like. The cover 30 in the above embodiment opens in the vertical direction, but either the upper end or the lower end may be closed. When the lower end of the cover 30 is closed, the lower end of the cover 30 can receive atomized liquid such as cutting agent that is scattered when the machine tool 1 performs cutting processing. This improves the convenience of the control panel 20.

[0040] The housing 40 is not limited to the above embodiment as long as it can fix the blower 50 and can take in the air blown by the blower 50 and then discharge it to the heat dissipation mechanism 90. For example, the housing 40 may be substantially octahedral. A part of the housing 40 may be formed with a curved surface.

[0041] Housing 40 may have blower 50 fixed to wall portions 403-405. In this case, first opening 41 is disposed in wall portions 403-405 to which blower 50 is fixed. Housing 40 may have an opening communicating with hollow portion 43 in addition to first opening 41, second opening 42, and hole 45.

[0042] The second opening 42 of the housing 40 does not have to cover the lower end of the heat dissipation mechanism 90. When the housing 40 and the heat dissipation mechanism 90 are placed apart from each other, the control panel 20 may have a baffle plate extending in the vertical direction between the housing 40 and the heat dissipation mechanism 90 on the left wall 202 to prevent the air discharged from the second opening 42 from spreading and flowing inside the cover 30. The housing 40 may be placed at a position other than below the heat dissipation mechanism 90. In this case, it is desirable that the cooling fins of the heat dissipation mechanism 90 extend in a direction that allows the air discharged from the second opening 42 to pass through the inside of the heat dissipation mechanism 90.

[0043] The housing 40 may not have the cross wall portion 44. In this case, instead of the cross wall portion 44, the heat dissipation mechanism 90 may have a flat wall that protrudes leftward from the lower portion and extends in the front-rear direction. The cover 30 may have a flat wall that protrudes inward (rightward) toward the lower portion of the heat dissipation mechanism 90 and extends in the front-rear direction. The wall portion 405 may not have the hole 45. The plug 46 is an example of a plug for blocking the hole 45, and a door that slides on the outside of the wall portion 405 may block the hole 45. A nut with a female thread may be fixed to the wall portion 405, and a bolt with a male thread may be used as a plug. [Explanation of symbols]

[0044] 1 Machine tools 20 Control Panel 21 Storage Box 30 Cover 31 Opening 40 Case 41 First opening 42 Second opening 43 Hollow part 44 Cross wall 45 holes 46 Stopper 50 Blower 90 Heat dissipation mechanism 93 Input / Output Board 94 Control Board 202, 301 Left wall 301 Opposite part 311 Rear opening 312 Front opening 321~323 Outlet 401, 405 Wall section

Claims

1. Electrical components for controlling the machine tool; A storage box for storing the electrical components; a heat dissipation mechanism connected to the electrical component and having a portion disposed outside a predetermined wall of the storage box; a housing provided next to the heat dissipation mechanism on the outside of the storage box, the housing having a plurality of walls and a hollow space surrounded by the plurality of walls; a mounting portion disposed on the outer side of the predetermined wall, the mounting portion being a wall portion, and a blower being attached to the mounting portion; A cover that covers the outside of the blower, the cover has an opening around a periphery of an opposing portion extending parallel to the mounting portion and opposing the blower, The periphery of the facing portion is parallel to the mounting portion, The housing includes: a first opening portion that opens the mounting portion and communicates with the hollow portion; a second opening portion that is open to the heat dissipation mechanism side and communicates with the hollow portion, a direction in which the blower and the first opening are arranged and a direction in which the blower and the second opening are arranged intersect with each other, The second opening passes through a portion of the heat dissipation mechanism, The control panel is characterized in that the housing has a cross wall portion that protrudes from the mounting portion toward the outside of the housing on the heat dissipation mechanism side of the mounting portion relative to the blower, and extends in a direction intersecting the parallel direction in which the blower and the heat dissipation mechanism are arranged.

2. The blower is arranged alongside the heat dissipation mechanism in a predetermined direction parallel to the predetermined wall, 2. The control panel according to claim 1, wherein the opening is located at a position within the periphery of the facing portion, excluding a sandwiched position that is a position between the blower and the heat dissipation mechanism in the predetermined direction.

3. 3. The control panel according to claim 2, wherein the opening is located on at least one of one side and the other side of the opposing portion in a direction intersecting the predetermined direction.

4. The control panel according to claim 2 or 3, characterized in that the cover covers the outside of the heat dissipation mechanism and further has an exhaust port that opens the cover on the opposite side of the heat dissipation mechanism from the blower in the specified direction.

5. A machine tool comprising a control panel according to any one of claims 1 to 4.

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