Control panel for machine tools

Abstract

This operation panel for a machine tool comprises: a first housing (31U) that accommodates a cooling target object; a blower device (61) that is disposed inside the first housing (31U); and an air guide member (81) that forms an air flow passage (90) inside the first housing (31U) and guides air blown out from the blower device (61) towards the cooling target object through the air flow passage (90). The air flow passage (90) has an expanded flow passage section (150) in which the flow passage area of the air flow passage (90) increases progressively from the upstream side of the airflow towards the downstream side.

Description

[Technical field]

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

[0002] For example, JP2016-530658A (Patent Document 1) discloses a control console for a numerically controlled machine tool. The control console includes a housing, a screen disposed on the front side of the housing, at least one circuit board having electrical components, and a cooling channel through which a fluid can pass. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2016-530658 Summary of the Invention [Problem to be solved by the invention]

[0004] There is known an operation panel for a machine tool, as disclosed in the above-mentioned Patent Document 1. In such an operation panel for a machine tool, various objects to be cooled whose temperatures increase with the operation of the machine tool are housed in the housing of the operation panel, and it is therefore necessary to efficiently cool these objects in the limited space inside the housing.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems and to provide a control panel for a machine tool that is capable of efficiently cooling an object to be cooled housed within a housing. [Means for solving the problem]

[0006] A control panel for a machine tool according to the present invention includes a housing for accommodating an object to be cooled, a blower arranged in the housing, and an air guide member for forming an air flow path in the housing and guiding air sent out from the blower toward the object to be cooled through the air flow path. The air flow path has an enlarged flow path portion in which the flow path area of ​​the air flow path increases from the upstream side to the downstream side of the air flow.

[0007] According to the thus configured operation panel for a machine tool, the expanded flow passage section is configured so that the flow passage area of ​​the air flow passage increases from the upstream side to the downstream side of the air flow, so that the air can flow smoothly in the expanded flow passage section. This increases the amount of air flowing toward the object to be cooled, thereby improving the cooling efficiency of the object to be cooled.

[0008] Preferably, the blower device has a plurality of blades arranged at intervals from one another in a circumferential direction of the predetermined axis and rotating about the predetermined axis. The enlarged flow path portion extends in the circumferential direction of the predetermined axis.

[0009] According to the operation panel for a machine tool configured in this manner, air can flow smoothly in the enlarged flow passage portion extending in the circumferential direction of a predetermined axis.

[0010] Preferably, the blower is an axial type blower that blows air in an axial direction of the predetermined axis. The enlarged flow passage portion extends in a circumferential direction of the predetermined axis at a position opposite to the plurality of blade portions in the axial direction of the predetermined axis.

[0011] According to the control panel for a machine tool configured in this manner, air can be made to flow smoothly in the enlarged flow passage portion extending in the circumferential direction of a predetermined axis at a position facing the multiple blade portions.

[0012] Preferably, the blower has a cylindrical shape centered on a predetermined axis, a central shaft portion arranged radially inward of the plurality of blade portions, a motor housed in the central shaft portion, a fan guard surrounding the outer periphery of the plurality of blade portions, and a rib portion extending between the central shaft portion and the fan guard and through which wiring from the motor is routed. The air guide member has a wall portion arranged at a position overlapping with the rib portion when viewed in the axial direction of the predetermined axis. When viewed in the axial direction of the predetermined axis, the enlarged flow passage portion extends around the central shaft portion from one space separated by the wall portion as a starting point, and further extends through the other space separated by the wall portion in a direction away from the central shaft portion.

[0013] According to the thus configured control panel for a machine tool, air can flow smoothly from one space separated by the wall through the other space of the wall in the expanded flow passage extending in a direction away from the central axis of the blower. In this case, since the wall is positioned so as to overlap with the rib portion of the blower that is obstructing the blowing of air, the amount of air blown from the blower to the air flow passage can be maintained regardless of the presence or absence of the wall.

[0014] Also preferably, the expanded flow path portion has a first section portion into which air sent out from the blower flows, the flow path depth in the axial direction of the specified axis increases from the upstream side to the downstream side of the air flow, and the flow path width in the radial direction of the specified axis is constant.

[0015] According to the thus configured operation panel for machine tools, the flow passage area of ​​the expanded flow passage portion gradually increases with an increase in the flow passage depth in the first section, so that a smooth air flow can be realized. Also, since the flow passage width is constant in the first section, it is possible to prevent the air guide member from becoming large in the radial direction of the predetermined axis.

[0016] Also preferably, the expanded flow path portion further includes a second section into which air discharged from the blower flows, which is positioned downstream of the air flow from the first section, and in which the flow path depth in the axial direction of the specified axis and the flow path width in the radial direction of the specified axis increase from the upstream side to the downstream side of the air flow.

[0017] According to the operation panel for a machine tool configured in this manner, in the second section, the flow path area of ​​the expanded flow path section rapidly increases as the flow path depth and flow path width increase, thereby achieving an even smoother air flow.

[0018] Also preferably, the expanded flow path section further includes a third section into which air sent out from the blower flows, which is positioned downstream of the air flow from the second section, which has a constant flow path depth in the axial direction of the specified axis, and which has a flow path width in the radial direction of the specified axis that increases from the upstream side to the downstream side of the air flow.

[0019] According to the thus configured operation panel for a machine tool, the flow passage area of ​​the expanded flow passage section gradually increases with an increase in the flow passage width in the third section, so that a smooth air flow can be realized. Also, since the flow passage depth is constant in the third section, it is possible to prevent the air guide member from becoming large in the axial direction of the predetermined axis.

[0020] Also preferably, the operation panel for the machine tool further includes an electronic component. The object to be cooled is a heat sink that is stacked with the electronic component in the axial direction of the predetermined axis and connected to the electronic component. The air guide member has a first flat portion to which the air blower is connected and that extends in a planar direction perpendicular to the predetermined axis, an opening portion that opens the air flow path toward the radially outward direction of the predetermined axis, a second flat portion that is disposed at a position away from the first flat portion in the radial direction of the predetermined axis and at a position shifted from the first flat portion in the axial direction of the predetermined axis, and that extends in a planar direction perpendicular to the predetermined axis, and an inclined portion that extends in an oblique direction with respect to the predetermined axis between the first flat portion and the second flat portion. The air blower, the second flat portion, and the heat sink are arranged in the order listed, side by side from the radially inner side to the radially outer side of the predetermined axis. The first flat portion and the electronic component are arranged in the order listed, side by side from the radially inner side to the radially outer side of the predetermined axis.

[0021] According to the control panel for a machine tool configured in this manner, the air blower, the air guide member, the electronic components and the heat sink can be arranged in a compact space in the axial direction of the predetermined axis. Effect of the Invention

[0022] As described above, according to the present invention, it is possible to provide a control panel for a machine tool capable of efficiently cooling an object to be cooled housed in a housing. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a machine tool in which a control panel in accordance with a first embodiment of the present invention is used. [Diagram 2] FIG. 2 is a perspective view showing the operation panel in FIG. [Diagram 3] 3 is a cross-sectional view showing the operation panel as seen in the direction of the arrows on the line III-III in FIG. 2. [Figure 4] 4 is a perspective view showing an air guide member and an air blower in FIG. 3. [Diagram 5] 5 is a plan view showing the air guide member and the air blower as viewed in the direction indicated by the arrow V in FIG. 4. [Figure 6] FIG. 4 is a perspective view showing the blower device in FIG. [Figure 7] 4 is another perspective view showing the blower device in FIG. 3. [Figure 8] FIG. 4 is a plan view showing the internal structure of the air guide member. [Figure 9] 9 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line IX-IX in FIG. 8. [Figure 10] 9 is a cross-sectional view showing the air guide member as seen in the direction of the arrow on line XX in FIG. 8. [Figure 11] 10 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XI-XI in FIG. 8. [Figure 12] 10 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XII-XII in FIG. 8. [Figure 13] 10 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XIII-XIII in FIG. 8. [Figure 14] 11 is a plan view showing an internal structure of an air guide member of a control panel in accordance with a second embodiment of the present invention. FIG. [Figure 15] 15 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on the line XV-XV in FIG. 14. [Figure 16] 16 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XVI-XVI in FIG. 14. [Figure 17] 17 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XVII-XVII in FIG. 14. [Figure 18] 15 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XVIII-XVIII in FIG. 14. [Figure 19] 19 is a cross-sectional view showing the air guide member as seen in the direction of the arrows on line XIX-XIX in FIG. 14. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0025] (Embodiment 1) Fig. 1 is a perspective view showing a machine tool in which a control panel in a first embodiment of the present invention is used. Referring to Fig. 1, machine tool 100 is a machining center that machines a workpiece by bringing a rotating tool into contact with the workpiece, and more specifically, is a horizontal machining center in which the central axis of rotation of the tool extends in the horizontal direction. Machine tool 100 is an NC (Numerically Control) machine tool in which various operations for machining a workpiece are automated by numerical control using a computer.

[0026] Machine tool 100 has a cover body 21. Cover body 21 defines a machining area and forms the external appearance of machine tool 100. The machining area is a space where machining of a workpiece is performed, and is sealed so that foreign matter such as cutting chips or cutting oil resulting from workpiece machining does not leak out of the machining area.

[0027] The cover body 21 has a front cover 23 and a door section 25. The front cover 23 is provided with an opening 26. The opening 26 opens the processing area to the outside space. The door section 25 is provided in the opening 26. The door section 25 is slidable between an open position where the opening 26 is open and a closed position where the opening 26 is closed (the position of the door section 25 shown in FIG. 1).

[0028] The machine tool 100 further includes an operation panel 10. The operation panel 10 is provided outside the machining area. The operation panel 10 is attached to a front cover 23. The operation panel 10 is provided adjacent to an opening 26.

[0029] It should be noted that the control panel in the present invention is not limited to horizontal machining centers, but can also be applied to, for example, lathes, vertical machining centers, multi-tasking machines having turning and milling functions, or AM / SM hybrid machines capable of additive manufacturing (AM) processing of a workpiece and subtractive manufacturing (SM) processing of a workpiece.

[0030] Next, the overall structure of the pendant 10 will be described. Fig. 2 is a perspective view showing the pendant 10 in Fig. 1. Referring to Fig. 2, the pendant 10 has a housing 31. The housing 31 forms the outer appearance of the pendant 10.

[0031] The housing 31 has a first housing 31U and a second housing 31L. The first housing 31U is disposed above the second housing 31L. The first housing 31U is connected to the second housing 31L so as to be rotatable about a rotation center axis 120. Each of the first housing 31U and the second housing 31L has a flat plate shape. Each of the first housing 31U and the second housing 31L has a flat plate shape parallel to a plane including the rotation center axis 120.

[0032] The operation panel 10 includes an operation unit 32 such as various buttons, dials, switches, etc. that an operator uses when operating the machine tool 100, and a display unit 36 ​​that indicates the machining state of a workpiece in the machine tool 100. The operation unit 32 such as buttons, dials, switches, etc. is provided in the second housing 31L. The display unit 36 ​​is provided in the first housing 31U.

[0033] Fig. 3 is a cross-sectional view showing the operation panel as seen in the direction of the arrows on line III-III in Fig. 2. With reference to Figs. 2 and 3, the first housing 31U has an opposing wall 52. The opposing wall 52 is disposed on the rear side of the display unit 36. The opposing wall 52 extends in a planar direction perpendicular to the thickness direction of the first housing 31U. The opposing wall 52 and the display unit 36 ​​are disposed at a distance from each other in the thickness direction of the first housing 31U. The opposing wall 52, together with the display unit 36, defines an internal space for accommodating a blower 61 (described later) and the like.

[0034] The operation panel 10 further has a partition wall portion 55. The partition wall portion 55 is disposed in the first housing 31U. The partition wall portion 55 faces the opposing wall 52 with a gap therebetween. The partition wall portion 55 extends parallel to the opposing wall 52. The distance between the opposing wall 52 and the partition wall portion 55 in the thickness direction of the first housing 31U is smaller than the distance between the display unit 36 ​​and the partition wall portion 55 in the thickness direction of the first housing 31U.

[0035] An air passage 54 is formed between the opposing wall 52 and the partition wall portion 55. An air intake port 53 is provided in the opposing wall 52. The air intake port 53 is a through-hole that penetrates the opposing wall 52. The air intake port 53 communicates between the air passage 54 and the outside of the first housing 31U.

[0036] The operation panel 10 further includes a display device 41. The display device 41 is made of a display panel such as a liquid crystal panel or an organic EL panel. The display device 41 has a thin plate shape and is disposed parallel to a plane perpendicular to the thickness direction of the first housing 31U. The display unit 36 ​​is made up of the display surface of the display device 41.

[0037] The operation panel 10 further has an electronic component 43 and a heat sink 47. The electronic component 43 and the heat sink 47 are disposed between the display device 41 and the partition wall portion 55 in the thickness direction of the first housing 31U. The electronic component 43 is made of a CPU (Central Processing Unit). The electronic component 43 is mounted on a board 42. The board 42 is disposed in parallel with the opposing wall 52 and the partition wall portion 55. The electronic component 43 is disposed on the opposite side of the board 42 from the display device 41.

[0038] The heat sink 47 is made of a metal such as aluminum. The heat sink 47 is accommodated in the first housing 31U. The heat sink 47 is disposed between the electronic component 43 and the partition wall 55 in the thickness direction of the first housing 31U.

[0039] The heat sink 47 is connected to the electronic component 43. The heat sink 47 is thermally connected to the electronic component 43. Grease or a thermally conductive sheet may be interposed between the heat sink 47 and the electronic component 43. The heat sink 47 is arranged stacked on top of the electronic component 43 in the thickness direction of the first housing 31U (the axial direction of a central axis 130 described later).

[0040] The heat sink 47 has a heat sink 44 and a plurality of fins 45. The heat sink 44 is arranged parallel to the opposing wall 52 and the partition wall portion 55. The heat sink 44 faces the board 42 via the electronic component 43. The heat sink 44 is connected to the electronic component 43. The plurality of fins 45 are arranged between the partition wall portion 55 and the heat sink 44 in the thickness direction of the first housing 31U. The plurality of fins 45 are provided integrally with the heat sink 44. The plurality of fins 45 extend from the heat sink 44 toward the partition wall portion 55. The plurality of fins 45 are arranged at intervals from each other in a direction perpendicular to the thickness direction of the first housing 31U.

[0041] The operation panel 10 further has a blower 61 and an air guide member 81. The blower 61 and the air guide member 81 are arranged in the first housing 31U. The blower 61 and the air guide member 81 are arranged between the display device 41 and the partition wall portion 55 in the thickness direction of the first housing 31U. The blower 61 is connected to the air guide member 81. The blower 61 is attached to the partition wall portion 55. The blower 61 faces the opposing wall 52 via an air passage 54. The air passage 54 is in communication with the suction side of the blower 61.

[0042] The air guide member 81 forms an air flow path 90 inside the first housing 31U. The air guide member 81 is made of a duct that forms the air flow path 90.

[0043] The air guide member 81 is provided with an upstream opening 84 and a downstream opening 85 (opening). The air flow path 90 extends between the upstream opening 84 and the downstream opening 85. The upstream opening 84 is provided at the upstream end of the air flow in the air flow path 90. The air flow path 90 communicates with the blowing side of the blower 61 through the upstream opening 84.

[0044] The downstream opening 85 is provided at an end portion on the downstream side of the air flow in the air flow passage 90. The downstream opening 85 opens into the space between the heat dissipation plate 44 and the partition wall portion 55. The downstream opening 85 opens facing the heat sink 47. The downstream opening 85 opens facing the multiple fins 45.

[0045] As the blower 61 is driven, air outside the first housing 31U is taken into the air passage 54 inside the first housing 31U through the air intake 53. The air flowing through the air passage 54 is sent out from the blower 61 to the air flow path 90. The air passes through the air flow path 90 and is guided toward the heat sink 47 (the multiple fins 45). The air whose temperature has increased due to heat exchange with the heat sink 47 flows around the end 57 of the partition wall 55 and flows out into the air passage 54. The air that has flowed out into the air passage 54 is exhausted to the outside of the first housing 31U through an exhaust port (not shown) provided in the opposing wall 52.

[0046] Next, the structures of the air blower 61 and the air guide member 81 will be described in more detail. Fig. 4 is a perspective view showing the air guide member and the air blower in Fig. 3. Fig. 5 is a plan view showing the air guide member and the air blower as viewed in the direction indicated by the arrow V in Fig. 4. Figs. 6 and 7 are perspective views showing the air blower in Fig. 3. Fig. 6 shows the air blower 61 on the suction side, and Fig. 7 shows the air blower 61 on the blowing side.

[0047] 3 to 7, the blower 61 has a plurality of blades 66, a central shaft 63, and a motor 62. The blades 66 are arranged in a direction perpendicular to the axis of the blades 66. The motor 62 is arranged in a direction parallel to the axis of the blades 66.

[0048] The multiple blades 66 are arranged at intervals from one another in the circumferential direction of the central axis 130, which is an imaginary straight line. The multiple blades 66 are arranged at equal intervals in the circumferential direction of the central axis 130. The central axis 130 extends in the thickness direction of the first housing 31U. The axial direction of the central axis 130 corresponds to the thickness direction of the first housing 31U.

[0049] The blower 61 is an axial type that blows air in the axial direction of the central axis 130. The blower 61 is a propeller fan. The blower 61 has a flat plate-like appearance with the axial direction of the central axis 130 being the thickness direction. The end face side of the blower 61 facing in one direction along the axial direction of the central axis 130 corresponds to the suction side, and the end face side of the blower 61 facing in the opposite direction along the axial direction of the central axis 130 corresponds to the blowing side.

[0050] The central shaft portion 63 is provided on the axis of the central shaft 130. The central shaft portion 63 has a cylindrical shape centered on the central shaft 130. The central shaft portion 63 is disposed radially inward of the central shaft 130 with respect to the multiple blade portions 66.

[0051] The central shaft portion 63 has a first disk portion 64, a second disk portion 67, and a cylindrical portion 65. The first disk portion 64 and the second disk portion 67 have a disk shape centered on the central axis 130. The first disk portion 64 and the second disk portion 67 are arranged at a distance from each other in the axial direction of the central axis 130. The first disk portion 64 is arranged on the suction side, and the second disk portion 67 is arranged on the discharge side.

[0052] Cylindrical portion 65 has a cylindrical shape centered on central axis 130. Cylindrical portion 65 is connected to first disk portion 64 at one end in the axial direction of central axis 130. Cylindrical portion 65 is separated from second disk portion 67. Root portions of multiple blades 66 are connected to cylindrical portion 65.

[0053] The motor 62 is housed in the central shaft portion 63. The motor 62 is disposed in a space surrounded by the first disk portion 64, the second disk portion 67, and the cylindrical portion 65. The motor 62 is supported by the second disk portion 67. The output shaft of the motor 62 is connected to the first disk portion 64. By transmitting the rotation from the motor 62 to the first disk portion 64 and the cylindrical portion 65, the multiple blade portions 66 rotate around the central shaft 130 in the direction indicated by the arrow 140 shown in FIG. 5.

[0054] The blower 61 further has a fan guard 70 and a plurality of rib portions 68. The fan guard 70 is provided so as to surround the outer periphery of the plurality of blade portions 66. The fan guard 70 is provided at a position spaced away from the central shaft portion 63 on the radial outside of the central shaft 130. The plurality of blade portions 66 are disposed in a space 72 between the central shaft portion 63 and the fan guard 70 in the radial direction of the central shaft 130. A gap is provided between the fan guard 70 and the plurality of blade portions 66 in the radial direction of the central shaft 130.

[0055] The multiple rib portions 68 extend between the fan guard 70 and the central shaft portion 63. The multiple rib portions 68 are arranged at intervals from one another in the circumferential direction of the central shaft 130. The rib portions 68 extend from the radially inner side to the radially outer side of the central shaft 130 while being offset in the circumferential direction of the central shaft 130. The rib portions 68 are continuous at their ends on the radially inner side of the central shaft 130 with the outer circumferential edge of the second disk portion 67. The rib portions 68 are continuous at their ends on the radially outer side of the central shaft 130 with the fan guard 70.

[0056] The multiple rib portions 68 include a rib portion 68j. As shown in Fig. 7, wiring 71 extending from the motor 62 is arranged in the rib portion 68j. The wiring 71 includes a power line and a signal line of the motor 62. The wiring 71 is drawn from the central shaft portion 63 in which the motor 62 is housed, through the rib portion 68j, to the fan guard 70. The width of the rib portion 68j in the circumferential direction of the central shaft 130 is larger than the width of the rib portions 68 other than the rib portion 68j in the circumferential direction of the central shaft 130.

[0057] The air guide member 81 has a first flat portion 86, an inclined portion 87, and a second flat portion 88. The first flat portion 86 and the second flat portion 88 have a flat plate shape with the axial direction of the central axis 130 being the thickness direction. The inclined portion 87 connects the first flat portion 86 and the second flat portion 88. The inclined portion 87 has a flat plate shape extending in an oblique direction relative to the first flat portion 86 and the second flat portion 88.

[0058] The blower 61 is connected to the first flat portion 86. The first flat portion 86 extends in a planar direction perpendicular to the central axis 130. The blower 61 is provided stacked on the first flat portion 86 in the axial direction of the central axis 130. The upstream opening 84 is provided in the first flat portion 86. The upstream opening 84 opens the air flow path 90 toward the axial direction of the central axis 130. The upstream opening 84 opens in a range where the central axis portion 63 and the space 72 are projected in the axial direction of the central axis 130.

[0059] The second flat portion 88 is disposed at a position away from the first flat portion 86 in the radial direction of the central axis 130 and at a position offset from the first flat portion 86 in the axial direction of the central axis 130. The second flat portion 88 extends in a planar direction perpendicular to the central axis 130. The downstream opening 85 is provided in the second flat portion 88. The downstream opening 85 opens the air flow path 90 facing radially outward of the central axis 130.

[0060] Second planar portion 88 is provided at a position shifted from first planar portion 86 in the axial direction of central axis 130 toward partition wall portion 55. Second planar portion 88, together with first planar portion 86, forms a stepped shape in the axial direction of central axis 130. Blower device 61 is disposed in the stepped portion formed by first planar portion 86 and second planar portion 88.

[0061] The inclined portion 87 is disposed between the first flat portion 86 and the second flat portion 88 in the radial direction of the central axis 130. The inclined portion 87 extends obliquely with respect to the central axis 130 between the first flat portion 86 and the second flat portion 88.

[0062] The blower 61, the second flat portion 88, and the heat sink 47 (the multiple fins 45) are arranged in the order listed, from the radially inner side to the radially outer side of the central axis 130. The blower 61, the second flat portion 88, and the heat sink 47 (the multiple fins 45) are arranged in the same plane perpendicular to the central axis 130. The second flat portion 88 is arranged opposite the blower 61 in the radial direction of the central axis 130, via the inclined portion 87. The heat sink 47 (the multiple fins 45) is arranged opposite the second flat portion 88 in the radial direction of the central axis 130.

[0063] The first flat portion 86 and the electronic component 43 are arranged side by side in the listed order from the radially inner side to the radially outer side of the central axis 130. The first flat portion 86 and the electronic component 43 are arranged in the same plane perpendicular to the central axis 130. The electronic component 43 is arranged opposite the electronic component 43 in the radial direction of the central axis 130, with the inclined portion 87 interposed therebetween.

[0064] The second flat portion 88 is provided so as to be stacked on the heat sink 44 in the axial direction of the central axis 130.

[0065] According to such a configuration, by utilizing the stepped shape formed by the first flat portion 86 and the second flat portion 88 of the air guide member 81, the air blower 61, the air guide member 81, the electronic components 43, and the heat sink 47 can be arranged in a compact space in the axial direction of the central axis 130. This makes it possible to reduce the thickness of the first housing 31U.

[0066] Next, a specific structure of the air flow path 90 provided in the air guide member 81 will be described. Fig. 8 is a plan view showing the internal structure of the air guide member. Fig. 9 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line IX-IX in Fig. 8. Fig. 10 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XX in Fig. 8. Fig. 11 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XI-XI in Fig. 8. Fig. 12 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XII-XII in Fig. 8. Fig. 13 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XIII-XIII in Fig. 8.

[0067] 4 to 13, the air flow path 90 has a circulating portion 90A and an extending portion 90B.

[0068] The circulating portion 90A opens through the upstream opening 84 in the axial direction of the central axis 130. Air sent out from the blower 61 flows into the circulating portion 90A. The extension portion 90B is disposed downstream of the circulating portion 90A in the air flow path 90. The extension portion 90B opens through the downstream opening 85 in the radially outward direction of the central axis 130.

[0069] The circumferential portion 90A extends in the circumferential direction of the central axis 130. The circumferential portion 90A extends in the circumferential direction of the central axis 130 at a position facing the multiple blade portions 66 in the axial direction of the central axis 130. The circumferential portion 90A extends in the circumferential direction of the central axis 130 at a position facing the space 72 in the axial direction of the central axis 130.

[0070] The circumferential portion 90A is provided on the first flat portion 86. The air guide member 81 (first flat portion 86) has a top portion 160, an inner circumferential side wall portion 161, and an outer circumferential side wall portion 162.

[0071] Top portion 160 has a disk shape centered on central axis 130. Top portion 160 faces central axis portion 63 (second disk portion 67) of blower 61 in the axial direction of central axis 130. Inner circumferential side wall portion 161 extends from the peripheral edge of top portion 160 in a direction away from blower 61 in the axial direction of central axis 130. Inner circumferential side wall portion 161 faces radially outward from central axis 130 and extends in the circumferential direction of central axis 130. Inner circumferential side wall portion 161 has a constant radius centered on central axis 130, regardless of its position in the circumferential direction of central axis 130.

[0072] Outer circumferential sidewall portion 162 faces radially inward of central axis 130 and extends in the circumferential direction of central axis 130. Outer circumferential sidewall portion 162 faces inner circumferential sidewall portion 161 in the radial direction of central axis 130. Circumferential portion 90A is formed between inner circumferential sidewall portion 161 and outer circumferential sidewall portion 162 in the radial direction of central axis 130.

[0073] The extension portion 90B extends from an end of the circulating portion 90A on the downstream side of the air flow in the air flow passage 90 toward the downstream opening 85. The extension portion 90B extends from the radially inner side of the central axis 130 to the radially outer side.

[0074] The extension portion 90B is provided on the inclined portion 87 and the second flat portion 88. The air guide member 81 (inclined portion 87, second flat portion 88) has a first side wall portion 163 and a second side wall portion 164. The first side wall portion 163 and the second side wall portion 164 face each other. The first side wall portion 163 extends from a wall portion 165 described below toward the opening edge of the downstream opening 85. The second side wall portion 164 extends from the outer circumferential side wall portion 162 toward the opening edge of the downstream opening 85.

[0075] The extension portion 90B is formed between the first side wall portion 163 and the second side wall portion 164. The distance between the first side wall portion 163 and the second side wall portion 164 increases from the upstream side to the downstream side of the air flow in the air flow path 90.

[0076] The air guide member 81 (first flat portion 86) further has a wall portion 165. The wall portion 165 extends between the inner circumferential side wall portion 161 and the first side wall portion 163. The wall portion 165 extends from the radially inner side to the radially outer side of the central axis 130 while being shifted in the circumferential direction of the central axis 130. The width of the wall portion 165 in the circumferential direction of the central axis 130 is smaller than the width of the rib portion 68j in the circumferential direction of the central axis 130.

[0077] 5, the wall portion 165 is disposed at a position overlapping with the rib portion 68j when viewed in the axial direction of the central axis 130. Note that, when viewed in the axial direction of the central axis 130, the wall portion 165 and the rib portion 68j may be configured to partially overlap each other.

[0078] The air flow path 90 has an expanded flow path section 150. The flow path area of ​​the expanded flow path section 150 increases from the upstream side to the downstream side of the air flow. The flow path area of ​​the expanded flow path section 150 is the opening area of ​​the expanded flow path section 150 when cut by a plane perpendicular to the air flow in the air flow path 90.

[0079] In this embodiment, the expanded flow path section 150 spans the entire range of the circulating section 90A and the extending section 90B. As shown in Figures 5 and 8, when viewed in the axial direction of the central axis 130, the expanded flow path section 150 starts from one space 210 separated by the wall section 165, extends around the central axis section 63, and further extends in a direction away from the central axis section 63 through the other space 220 separated by the wall section 165. When viewed in the axial direction of the central axis 130, the space 210 and the space 220 are provided on both sides of the wall section 165.

[0080] The direction in which expanded flow path section 150 (wound section 90A) winds around central axis 130 starting from space 210 toward space 220 is the same as the rotation direction of multiple blades 66 in blower 61.

[0081] According to this configuration, the expanded flow path section 150 is configured so that the flow path area of ​​the air flow path 90 increases from the upstream side to the downstream side of the air flow, thereby allowing air to flow smoothly in the expanded flow path section 150.

[0082] In the present embodiment, air sent out from blower 61 flows into circumferential section 90A in the axial direction of central axis 130, changes direction in the circumferential direction of central axis 130, and flows from the upstream side to the downstream side of the air flow in air flow path 90. In this case, the flow rate of the air flow in circumferential section 90A increases from the upstream side to the downstream side of the air flow in air flow path 90, so that the pressure on the downstream side of the air flow is greater than the pressure on the upstream side. In contrast, the flow path area of ​​circumferential section 90A increases from the upstream side to the downstream side of the air flow, so that the air can flow smoothly in circumferential section 90A.

[0083] For the above reasons, the flow rate of air supplied to the heat sink 47 can be increased, and the cooling efficiency of the heat sink 47, and therefore the electronic components 43, can be improved.

[0084] In this embodiment, when viewed in the axial direction of the central axis 130, the wall portion 165 is provided at a position overlapping with the rib portion 68j that prevents the blowing of air from the blowing device 61 to the air flow path 90. Therefore, regardless of the presence or absence of the wall portion 165, the amount of air blown from the blowing device 61 to the air flow path 90 can be maintained.

[0085] 8 to 13, the expanded flow path section 150 (circulating section 90A) has a first section 91, a second section 92, and a third section 93. As shown in FIG.

[0086] In the first section 91, the second section 92, and the third section 93, air sent out from the air blower 61 flows in the axial direction of the central axis 130. The second section 92 is arranged on the downstream side of the air flow in the air flow path 90 with respect to the first section 91. The second section 92 is connected to the end of the first section 91 on the downstream side of the air flow in the air flow path 90. The third section 93 is arranged on the downstream side of the air flow in the air flow path 90 with respect to the second section 92. The third section 93 is connected to the end of the second section 92 on the downstream side of the air flow in the air flow path 90.

[0087] As shown in FIGS. 8 to 10, the first section 91 extends over an angular range of less than 90° centered on the central axis 130 starting from the space 210. The flow path area of the divergent flow path portion 150 in the first section 91 increases from the upstream side to the downstream side of the air flow (S1 < S2). In the first section 91, the flow path depth in the axial direction of the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow path 90 (H1 < H2), and the flow path width in the radial direction of the central axis 130 is constant (B1 = B2).

[0088] In the first section 91, the radius of the outer peripheral side wall portion 162 centered on the central axis 130 is constant. The distance between the inner peripheral side wall portion 161 and the outer peripheral side wall portion 162 is constant regardless of the position along the air flow direction in the air flow path 90.

[0089] As shown in FIGS. 8, 10, and 11, the second section 92 extends over an angular range of 90° centered on the central axis 130. The flow path area of the divergent flow path portion 150 in the second section 92 increases from the upstream side to the downstream side of the air flow (S2 < S3). In the second section 92, both the flow path depth in the axial direction of the central axis 130 and the flow path width in the radial direction of the central axis 130 increase from the upstream side to the downstream side of the air flow in the air flow path 90 (H2 < H3, B2 < B3).

[0090] In the second section 92, the radius of the outer peripheral side wall portion 162 centered on the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow path 90.

[0091] As shown in FIGS. 8 and 11 to 13, the third section 93 extends over an angular range of more than 90° and less than 180° centered on the central axis 130. The flow path area of the divergent flow path portion 150 in the third section 93 increases from the upstream side to the downstream side of the air flow (S3 < S4 < S5). In the third section 93, the flow path depth in the axial direction of the central axis 130 is constant, and the flow path width in the radial direction of the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow path 90 (H3 = H4 = H5, B3 < B4 < B5).

[0092] In the third section 93, the radius of the outer peripheral side wall portion 162 centered on the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow path 90. The outer peripheral side wall portions 162 in the second section 92 and the third section 93 may have a locus extending along a logarithmic spiral when viewed in the axial direction of the central axis 130. The bottom of the air flow path 90 is preferably connected to the inner peripheral side wall portion 161 and the outer peripheral side wall portion 162 forming the side portion of the air flow path 90 by a curved surface.

[0093] The angular range of the second section 92 centered on the central axis 130 is larger than the angular range of the first section 91 centered on the central axis 130. The angular range of the third section 93 centered on the central axis 130 is larger than the angular range of the second section 92 centered on the central axis 130.

[0094] According to such a configuration, in the first section 91, since the flow path area of the divergent flow path portion 150 gradually increases as the flow path depth increases, a smooth air flow can be realized. Also, in the first section 91, since the flow path width is constant, the width W of the air guiding member 81 shown in FIG. 8 can be kept small. Thereby, the air guiding member 81 can be configured compactly.

[0095] Furthermore, in the second section 92, the flow path area of ​​the expanded flow path section 150 increases rapidly with an increase in the flow path depth and flow path width, so that an even smoother air flow can be achieved.

[0096] In addition, in the third section 93, the flow path area of ​​the expanded flow path section 150 gradually increases with an increase in the flow path width, so that a smooth air flow can be achieved. In addition, in the third section 93, the flow path depth is constant, so that the thickness T of the air guide member 81 shown in Fig. 4 can be kept small. This allows the air guide member 81 to be configured even more compactly.

[0097] To summarize the structure of the operation panel 10 for a machine tool in the first embodiment of the present invention described above, the operation panel 10 for a machine tool in this embodiment includes a first housing 31U as a housing that houses a heat sink 47 as an object to be cooled, a blower 61 arranged in the first housing 31U, and an air guide member 81 that forms an air flow path 90 in the first housing 31U and guides air sent out from the blower 61 through the air flow path 90 toward the heat sink 47. The air flow path 90 has an enlarged flow path section 150 in which the flow path area of ​​the air flow path 90 increases from the upstream side to the downstream side of the air flow.

[0098] According to the thus configured operation panel 10 for a machine tool in the first embodiment of the present invention, by providing the air flow path 90 with the expanded flow path section 150 whose flow path area increases from the upstream side to the downstream side of the air flow, it becomes possible to make the air flow smoothly in the air flow path 90. This makes it possible to efficiently cool the heat sink 47 housed in the first housing 31U.

[0099] In this embodiment, the blower device of the present invention is described as being of an axial type, but this is not limited to this, and the blower device of the present invention may be, for example, a sirocco fan or a crossflow fan.

[0100] (Embodiment 2) Fig. 14 is a plan view showing an internal structure of the air guide member of the control panel in the second embodiment of the present invention. Fig. 14 corresponds to Fig. 8 in the first embodiment. Fig. 15 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XV-XV in Fig. 14. Fig. 16 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XVI-XVI in Fig. 14. Fig. 17 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XVII-XVII in Fig. 14. Fig. 18 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XVIII-XVIII in Fig. 14. Fig. 19 is a cross-sectional view showing the air guide member seen in the direction of the arrows on the line XIX-XIX in Fig. 14.

[0101] The operation panel in this embodiment basically has the same structure as the operation panel 10 in embodiment 1. Hereinafter, description of the overlapping structures will not be repeated.

[0102] 14 to 19, in this embodiment, air flow path 90 has a constant flow path portion 155 and an enlarged flow path portion 150. As shown in FIG.

[0103] 14 to 16, constant flow path section 155 is provided at a position corresponding to first section 91 of circulating section 90A in embodiment 1. Constant flow path section 155 has a constant flow path area (S6=S7) regardless of the position in the air flow direction in air flow path 90. In constant flow path section 155, the flow path depth in the axial direction of central axis 130 is constant (H6=H7), and the flow path width in the radial direction of central axis 130 is constant (B6=B7).

[0104] 14, the expanded flow path section 150 is provided at a position corresponding to the second section 92 and the third section 93 of the circulating section 90A in embodiment 1 and the extending section 90B in embodiment 1. The expanded flow path section 150 (circulating section 90A) has a fourth section 96 at a position corresponding to the second section 92 of the circulating section 90A in embodiment 1. The expanded flow path section 150 (circulating section 90A) has a fifth section 97 at a position corresponding to the third section 93 of the circulating section 90A in embodiment 1.

[0105] As shown in FIGS. 14, 16, and 17, the flow passage area of the enlarged flow passage portion 150 in the fourth section portion 96 increases from the upstream side to the downstream side of the air flow (S7 < S8). In the fourth section portion 96, the flow passage depth in the axial direction of the central axis 130 is constant, and the flow passage width in the radial direction of the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow passage 90 (H7 = H8, B7 < B8).

[0106] As shown in FIGS. 14, 17 to 19, the flow passage area of the enlarged flow passage portion 150 in the fifth section portion 97 increases from the upstream side to the downstream side of the air flow (S8 < S9 < S10). In the fifth section portion 97, the flow passage depth in the axial direction of the central axis 130 is constant, and the flow passage width in the radial direction of the central axis 130 increases from the upstream side to the downstream side of the air flow in the air flow passage 90 (H8 = H9 = H10, B8 < B9 < B10).

[0107] In the present embodiment, the air flow passage 90 is composed of a constant flow passage portion 155 and an enlarged flow passage portion 150, and does not have a section in which the flow passage area decreases from the upstream side to the downstream side of the air flow.

[0108] According to the operation panel for a machine tool in the second embodiment of the present invention configured as described above, the effects described in the first embodiment can be achieved in the same manner.

[0109] It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Industrial Applicability

[0110] This invention is applied to an operation panel used for a machine tool.

Explanation of Signs

[0111] 10 operation panel, 21 cover body, 23 front cover, 25 door portion, 26 opening, 31 housing, 31L second housing, 31U first housing, 32 operation portion, 36 display portion, 41 display device, 42 board, 43 electronic components, 44 heat sink, 45 fin, 47 heat sink, 52 opposing wall, 53 intake port, 54 air passage, 55 partition wall portion, 57 end portion, 61 blower, 62 motor, 63 central shaft portion, 64 first disk portion, 65 cylindrical portion, 66 blade portion, 67 second disk portion, 68, 68j rib portion, 70 fan guard, 71 wiring, 81 air guide member, 84 upstream opening, 85 downstream opening, 86 first flat portion, 87 inclined portion, 88 second flat portion, 90 air passage, 90A Circumferential portion, 90B extension portion, 91 first section portion, 92 second section portion, 93 third section portion, 96 fourth section portion, 97 fifth section portion, 100 machine tool, 120 pivot central axis, 130 central axis, 150 enlarged flow path portion, 155 constant flow path portion, 160 top portion, 161 inner peripheral side wall portion, 162 outer peripheral side wall portion, 163 first side wall portion, 164 second side wall portion, 165 wall portion, 210, 220 space.

Claims

1. A housing that houses an object to be cooled; A blower device disposed within the housing; an air guide member that forms an air flow path within the housing and guides air sent out from the air blower through the air flow path toward the object to be cooled, the air flow path has an enlarged flow path portion in which a flow path area of ​​the air flow path increases from the upstream side to the downstream side of the air flow, The air blower has a plurality of blades that are spaced apart from one another in a circumferential direction of a predetermined axis and rotate around the predetermined axis, The enlarged flow path portion extends in a circumferential direction about the predetermined axis, The blower is an axial flow type that blows air in an axial direction of the predetermined axis, The enlarged flow path portion extends in a circumferential direction of the specified shaft at a position opposing the plurality of blade portions in the axial direction of the specified shaft.

2. The blower device is a central shaft portion having a cylindrical shape centered on the predetermined axis and disposed radially inward of the predetermined axis with respect to the plurality of blade portions; A motor accommodated in the central shaft portion; a fan guard surrounding an outer periphery of the plurality of blades; a rib portion extending between the central shaft portion and the fan guard, through which wiring from the motor is routed, the air guide member has a wall portion disposed at a position overlapping with the rib portion when viewed in the axial direction of the predetermined axis, 2. A control panel for a machine tool according to claim 1, wherein, when viewed in the axial direction of the specified axis, the enlarged flow path portion extends around the central axis portion from one space separated by the wall portion as a starting point, and further extends in a direction away from the central axis portion through the other space separated by the wall portion.

3. 3. An operation panel for a machine tool according to claim 1 or 2, wherein the expanded flow path portion has a first section into which air sent out from the blower device flows, a flow path depth in the axial direction of the specified axis increases from the upstream side to the downstream side of the air flow, and a flow path width in the radial direction of the specified axis is constant.

4. 4. An operation panel for a machine tool as described in claim 3, wherein the expanded flow path portion further includes a second section into which air sent out from the blower device flows, the second section being positioned downstream of the air flow relative to the first section, and in which a flow path depth in the axial direction of the specified axis and a flow path width in the radial direction of the specified axis increase from the upstream side to the downstream side of the air flow.

5. 5. An operation panel for a machine tool as described in claim 4, wherein the expanded flow path portion further includes a third section into which air discharged from the blower device flows, which is positioned downstream of the air flow from the second section, which has a constant flow path depth in the axial direction of the specified axis, and which has a flow path width in the radial direction of the specified axis that increases from the upstream side to the downstream side of the air flow.

6. Further comprising electronic components; the cooling object is a heat sink that is stacked with the electronic component in the axial direction of the predetermined axis and is connected to the electronic component, The air guide member is A first planar portion to which the blower device is connected and which extends in a planar direction perpendicular to the predetermined axis; a second flat surface portion having an opening portion that opens the air flow passage toward the radially outward direction of the predetermined axis, the second flat surface portion being disposed at a position away from the first flat surface portion in the radial direction of the predetermined axis and at a position offset from the first flat surface portion in the axial direction of the predetermined axis, and extending in a planar direction perpendicular to the predetermined axis; an inclined portion extending in a direction oblique to the predetermined axis between the first planar portion and the second planar portion; the blower, the second planar portion, and the heat sink are arranged in the listed order from a radially inner side to a radially outer side of the predetermined axis, 6. The operation panel for a machine tool according to claim 1, wherein the first planar portion and the electronic component are arranged in the order listed from the radially inner side to the radially outer side of the predetermined axis.

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