Controller

Abstract

To enhance workability and reduce man-hours when attaching / detaching a fan to / from a housing of a controller.SOLUTION: A controller 1 includes a fan unit 8 to be attached to an opening portion 80 provided in a back plate 2b of a housing 2. The fan unit 8 includes a fan 85 having an impeller 83 and a casing 84, a fan cover 86 contacting the casing 84 from an X2 side, and an attaching member 87 contacting the casing 84 from an X1 side. The attaching member 87 includes an attaching plate portion 87c that extends to the outside of the fan cover 86 and is fixed to the edge of the opening portion 80. The fan cover 86 includes an extending portion 86c extending outward beyond the casing 84, and a bent plate portion 86e bent from the tip of an extending portion 86c to the casing 84 side, and wiring 92 of the fan 85 is arranged between a wiring passage 89 between the bent plate portion 86e and the casing 84.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a controller including a housing that houses an electronic element having a large calorific value and a fan attached to the housing.

Background Art

[0002] Patent Document 1 describes a controller for controlling a robot, which includes a control circuit board and a plurality of drive circuit boards connected to the control circuit board. Each drive circuit board is arranged in a state of standing vertically with respect to the control circuit board. A power module and a metal heat sink are attached to each drive circuit board.

[0003] The controller of Patent Document 1 includes a rectangular parallelepiped housing. Inside the housing, in addition to the control circuit board and the drive circuit boards, a plurality of units such as a power supply circuit board, a communication interface board, and a drive power supply circuit board are housed. A cooling fan is attached to the housing so as to face the heat sinks mounted on the control circuit board and the drive circuit boards.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventionally, as a structure for attaching a cooling fan to a housing, a fixing bracket for screwing the fan to an opening of the housing is fixed by a rivet or the like, and the fan and the fan cover are positioned and screwed to the fixing bracket.

[0006] However, with the conventional mounting structure, it is not possible to detach and attach the fan and the fan cover as a unit to the housing. Also, when the fan cover is attached to the fan, it is not possible to access the wiring of the fan. Therefore, the connection of the fan wiring must be performed with the fan cover not attached. As a result, it is difficult to detach and attach the fan and the fan cover as a unit, and the number of man-hours is large. Furthermore, since the screw holes of the fixing brackets are located in positions hidden by the fan cover, the tip of the screw for fixing the fan must be blindly inserted into the screw holes of the fixing brackets. Therefore, workability is poor.

[0007] In view of the above problems, an object of the present invention is to improve workability and reduce the number of man-hours when detaching and attaching a fan to a housing of a controller.

Means for Solving the Problems

[0008] To solve the above problems, the present invention has a housing, a fan unit detachably attached to an opening of the housing, and a substrate housed in the housing. The fan unit includes a fan having an impeller and a casing, a fan cover abutting on the casing, and a mounting member abutting on the casing from a side opposite to the fan cover. The mounting member includes a mounting plate portion extending outside the fan cover as viewed from a direction facing the fan cover and fixed to an edge of the opening. The fan cover includes an extending portion extending outside the casing and a bent plate portion bent from a tip of the extending portion toward the casing side. The wiring of the fan is arranged in a wiring passage between the bent plate portion and the casing.

[0009] According to the present invention, a fan, a fan cover, and a mounting member are unitized, and the mounting member includes a mounting plate portion that extends outward from the fan cover. Also, a wiring passage is provided between the fan cover and the casing. In this way, since the fan, the fan cover, and the mounting member are unitized and the wiring of the fan can be drawn out between the fan cover and the casing when assembling the fan unit, the workability when attaching and detaching the fan to and from the housing is good and the number of man-hours is small. That is, with the mounting plate portion as the center, the entire fan unit can be tilted with respect to the opening, and the work of connecting the wiring of the fan to the power supply connector disposed inside the opening can be easily performed. Further, after connecting the wiring, the fan unit can be positioned in the opening, and the fixing work can be performed with screws or the like while visually checking the portion where the mounting plate portion and the edge of the opening overlap.

[0010] In the present invention, the fan cover and the casing are rectangular, the fan cover includes a first edge portion provided with the extending portion and a second edge portion intersecting the first edge portion, the mounting plate portion extends outside the second edge portion, and it is preferable that the wiring passage extends to a corner portion where the first edge portion and the second edge portion intersect. By doing so, when assembling the fan unit, the wiring can be drawn out from the wiring passage near the mounting plate portion. Therefore, the work of connecting the wiring of the fan to the power supply connector disposed inside the opening is easy.

[0011] In the present invention, it is preferable that the casing is provided with a wiring groove connected to the wiring passage. By doing so, since the wiring can be arranged in the wiring groove and the fan unit can be assembled, the wiring of the fan can be easily drawn out to the wiring passage.

[0012] In the present invention, the casing includes an outer plate against which the fan cover abuts, an inner plate against which the mounting member abuts, and a body portion that connects the outer plate and the inner plate and surrounds the impeller. It is preferable that a wiring holding portion is provided at the edge of the inner plate. By doing so, wiring that has changed its direction so as to face the inside of the housing can be held by the wiring holding portion, so that workability is good when connecting the wiring to a connector disposed inside the housing.

[0013] In the present invention, the housing includes an exterior plate provided with the opening, and it is preferable that the mounting plate portion is located closer to the casing side than the fan cover and is inserted inside the exterior plate. By doing so, the mounting plate portion can be inserted inside the exterior plate, and the work of tilting the fan unit about the edge of the opening and connecting the wiring to the connector can be performed. Therefore, workability is good when attaching and detaching the fan unit. Further, since there is a step between the mounting plate portion and the fan cover, when the mounting plate portion is inserted inside the exterior plate, the step at the boundary between the back plate and the fan cover can be eliminated.

[0014] In the present invention, the opening faces the edge of the substrate, and it is preferable that a power supply connector connected to the wiring is disposed at the edge. By doing so, it is easy to access the power supply connector from the opening. Therefore, the wiring of the fan can be directly connected to the connector on the substrate without using a relay connector or the like. Further, since cooling air flowing along the substrate can be formed by driving the fan, the cooling effect on the substrate is high.

[0015] In the present invention, the housing includes an exterior plate provided with the opening, and as the opening, a first opening disposed at a position closer to the other edge of the exterior plate than one edge of the exterior plate, and a second opening disposed at a position closer to the one edge of the exterior plate than the other edge. The fan unit attached to the second opening is preferably in a posture rotated 180° around an axis perpendicular to the fan cover with respect to the fan unit attached to the first opening. Thus, by shifting the position of the opening, the cooling air can be configured to flow in a wide range, so that the cooling effect can be enhanced. Also, 2 By rotating one of the two fan units 180 degrees with respect to the other and attaching it, the position of the mounting plate portion and the position of the wiring passage can be optimized. For example, by arranging the mounting plate portions of the two fan units on the opposite sides, the openings can be arranged with a larger shift than when the mounting plate portions are arranged on the same side. Therefore, the cooling air can be configured to flow in a wide range. Also, since the wirings of the two fan units can be routed in close proximity, the wiring work can be made more efficient.

Advantages of the Invention

[0016] According to the present invention, the fan, the fan cover, and the mounting member are unitized, and the mounting member includes a mounting plate portion that extends outward from the fan cover. Also, a wiring passage is provided between the fan cover and the casing. Thus, if the fan, the fan cover, and the mounting member are unitized and the wiring of the fan can be drawn out between the fan cover and the casing when assembling the fan unit, the workability when attaching and detaching the fan to and from the housing is good and the number of man-hours is small. That is, with the mounting plate portion as the center, the entire fan unit can be tilted with respect to the opening, and the work of connecting the wiring of the fan to the power supply connector disposed inside the opening can be easily performed. Also, after connecting the wiring, the fan unit can be tilted to close the opening, and the fixing work can be performed with screws or the like while visually checking the portion where the mounting plate portion and the edge of the opening overlap.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0018] Hereinafter, with reference to the drawings, embodiments of the controller to which the present invention is applied will be described. The controller 1 of the present embodiment is a device that supplies power to a robot (manipulator) including an actuator such as a motor.

[0019] FIG. 1 is an external perspective view of the controller 1 to which the present invention is applied, as seen from the back side. FIG. 2 is a perspective view of the controller with the second case 22 removed. FIG. 3 is an external perspective view showing the state where the fan unit is removed from the housing. In this specification, the three directions of XYZ are directions orthogonal to each other. In this specification, for convenience, the first direction Z is set as the vertical direction of the controller 1. The Z1 direction is downward, and the Z2 direction is upward. The second direction X is the front-rear direction of the controller 1. The X1 direction is forward, and the X2 direction is backward. The third direction Y is the width direction of the controller 1. The Y1 direction and the Y2 direction are one side and the other side of the third direction Y. Note that in the actual usage mode of the controller 1, the first direction Z does not necessarily coincide with the vertical direction (vertical direction).

[0020] (Overall Configuration) As shown in FIGS. 1 and 2, the controller 1 includes a metal housing 2. The housing 2 is a rectangular parallelepiped, and includes a front plate 2a facing the X1 direction and a rear plate 2b facing the X2 direction, a first side plate 2c facing the Y1 direction and a second side plate 2d facing the Y2 direction, and a bottom plate 2e facing the Z1 direction and an upper plate 2f facing the Z2 direction. The front plate 2a, the rear plate 2b, the first side plate 2c, the second side plate 2d, the bottom plate 2e, and the upper plate 2f are exterior plates of the controller 1. In this embodiment, the members constituting the housing 2 include a first case 21 including the bottom plate 2e, the first side plate 2c, and the rear plate 2b, and the upper a second case 22 including the plate 2f and the second side plate 2d, a first interface panel 23 and a second interface panel 24 constituting the front plate 2a, and a housing frame 25.

[0021] As shown in FIG. 2, the housing frame 25 includes a rectangular frame-shaped front frame 26 to which the front plate 2a is fixed, a rectangular frame-shaped rear frame 27 to which the rear plate 2b is fixed, and a rectangular frame-shaped side frame 28 to which the second side plate 2d is fixed. The side frame 28 has an end on the X1 side fixed to the front frame 26 and an end on the X2 side fixed to the edge on the Y2 side of the rear plate 2b.

[0022] As shown in FIGS. 2 and 3, the controller 1 includes a communication board unit (not shown) disposed inside the housing 2, a control circuit board 4, a drive circuit board unit 5, a drive power supply circuit board unit 6, and a power supply unit 7. Further, the controller 1 includes two fan units 8 attached side by side in the third direction Y to the rear plate 2b of the housing 2, and a reinforcing member 9 spanned in the third direction Y inside the housing 2 to support the upper plate 2f from the bottom plate 2e side (Z1 side). The reinforcing member 9 is a beam member spanned between a power cover 10 fixed to the housing 2 and the side frame 28.

[0023] The communication board unit (not shown) is arranged on the back side (X2 side) of the first interface panel 23. The communication board unit is a unit in which two communication boards and a board fixing panel are stacked in the first direction Z via spacers. A plurality of external connection connectors 34 mounted on the communication board unit are respectively arranged in holes provided in the first interface panel 23 (see FIG. 1).

[0024] On the back side (X2 side) of the communication board unit, a drive power circuit board unit 6 and a drive circuit board unit 5 are arranged in this order. The drive power circuit board unit 6 is a unit in which two drive power circuit boards and a support plate are stacked in the first direction Z via spacers, and is fixed to the bottom plate 2e. Electronic elements such as capacitors 64 are mounted on the drive power circuit board.

[0025] As shown in FIG. 2, the power supply unit 7 is arranged at the end of the housing 2 in the Y1 direction. The power supply unit 7 is configured to be detachable from the housing 2 and can be removed in the X2 direction from an opening 20 provided at the end portion on the Y1 side of the back plate 2b. The power supply unit 7 is an elongated unit extending from the back plate 2b to the back side of an external power connector 70 arranged at the end on the Y1 side of the second interface panel 24. The middle portion of the power supply unit 7 in the second direction X is arranged inside a power cover 10 fixed to the housing 2.

[0026] As shown in FIG. 2, a fuse 11 connected to the external power connector 70 is arranged on the Z2 side of the power cover 10. The fuse 11 is connected to a noise filter 12 arranged at a position adjacent in the Y2 direction to the power cover 10. The noise filter 12 includes a filter circuit for removing noise superimposed on the alternating current supplied from the external power connector 70 via the fuse 11.

[0027] The alternating current output from the noise filter 12 is distributed to the drive power circuit board unit 6 and the power supply unit 7. The power supply unit 7 converts the alternating current distributed from the noise filter 12 into a direct current of 5V and a direct current of 24V, and supplies it to the control circuit board 4 (see FIG. 3) fixed to the bottom plate 2e of the housing 2. The direct current of 24V is supplied to the fan unit 8 via the control circuit board 4. Further, the power supply unit 7 converts the alternating current into a direct current of 15V and supplies it to the drive power circuit board unit 6. The drive power circuit board unit 6 converts the alternating current distributed from the noise filter 12 into a drive current (direct current) having a voltage different from the supply voltage from the power supply unit 7 and supplies it to the drive circuit board unit 5.

[0028] As shown in FIG. 2, the drive circuit board unit 5 includes four drive circuit boards 51 arranged at regular intervals in the third direction Y, a heat dissipation member 52 fixed to each drive circuit board 51, and a board holder 53. A power module such as an IGBT module is mounted on the drive circuit board 51. The heat dissipation member 52 is attached so as to be in contact with or face the power module, and includes fins extending in the second direction X. The board holder 53 is fixed to the bottom plate 2e of the housing 2. The four drive circuit boards 51 are held by the board holder 53 in a posture parallel to the XZ plane, and face the two fan units 8 attached to the back plate 2b of the housing 2 in the second direction X. Therefore, when the two fan units 8 are driven, air is blown into the gaps between the drive circuit boards 51, and the drive circuit boards 51 and the heat dissipation member 52 are cooled.

[0029] A reinforcing member 9 disposed on the X1 side of the drive circuit board unit 5 is provided with a large number of ventilation holes 93. The reinforcing member 9 faces the fan unit 8 attached to the back plate 2b and the ventilation holes 2i provided in the front plate 2a. Therefore, when the fan unit 8 is driven, the external air (cooling air) taken into the housing 2 from the ventilation holes 2i is blown to the drive circuit board unit 5 via the ventilation holes 93 and the space on the Z1 side of the reinforcing member 9, passes through the gaps between the drive circuit boards 51 and the heat dissipation member 52, and is exhausted to the outside of the housing 2 via the fan unit 8.

[0030] As shown in FIG. 3, a control circuit board 4 is disposed at the bottom of the housing 2 so as to be parallel to the bottom plate 2e. The control circuit board 4 is screwed to the tip of a stepped pin 2g protruding from the bottom plate 2e toward the Z2 side. Above the control circuit board 4 (in the Z2 direction), a drive circuit board 51 is disposed in a posture perpendicular to the control circuit board 4. The drive circuit board 51 is connected to the control circuit board 4 via a connector that fits in the first direction Z. One of the two fan units 8 (a first fan unit 8A described later) is disposed at a position offset from the Z1-side edge of the back plate 2b and faces the control circuit board 4 fixed to the bottom plate 2e in the second direction X. Therefore, when the fan unit 8 is driven, air is blown onto the control circuit board 4, and the electronic elements mounted on the control circuit board 4 are cooled.

[0031] As shown in FIG. 2, an output connector 56 is disposed at the X1-side end of each drive circuit board 51. The wiring 57 connected to the output connector 56 is passed through a noise removal ring 58, drawn out toward the X1 side through a wiring hole provided in the reinforcing member 9, and connected to an external output connector 59 provided on the second interface panel 24. When a connector on the manipulator side is connected to the external output connector 59, power is supplied from the controller 1 to the manipulator.

[0032] (Fan unit) As shown in FIGS. 1 and 3, the back plate 2b has two openings 80 arranged in the third direction Y. In the following description, the opening 80 on the Y2 side is referred to as a first opening 80A, and the opening 80 on the Y1 side is referred to as a second opening 80B. Fan units 8 having the same configuration are attached to the first opening 80A and the second opening 80B. In the following description, the fan unit 8 disposed in the first opening 80A is referred to as a first fan unit 8A, and the fan unit 8 disposed in the second opening 80B is referred to as a second fan unit 8B.

[0033] The first opening 80A and the second opening 80B are offset in the Z direction. The first opening 80A is provided at a position shifted toward the edge on the Z1 side of the back panel 2b. The second opening 80B is provided at a position shifted toward the edge on the Z2 side of the back panel 2b. As shown in FIG. 3, a fixing hole 81A for fixing the first fan unit 8A is provided at the edge on the Z2 side of the first opening 80A. Also, a fixing hole 81B for fixing the second fan unit 8B is provided at the edge on the Z1 side of the second opening 80B.

[0034] As shown in FIG. 3, inside the back panel 2b, a control circuit board 4 intersecting the back panel 2b and a drive circuit board 51 intersecting the back panel 2b and intersecting the control circuit board 4 are arranged. At the edge on the X2 side of the control circuit board 4 extending in the third direction Y, a connector 82 for power supply to the fan unit 8 is arranged. In this embodiment, the connector 82 includes a first connector 82A for supplying power to the first fan unit 8A and a second connector 82B for supplying power to the second fan unit 8B.

[0035] FIG. 4 is an exploded perspective view of the fan unit 8. FIG. 5(a) is a plan view of the fan unit 8, and FIG. 5(b) is a side view of the fan unit 8. The XYZ directions shown in FIGS. 4 and 5 are the directions when the fan unit 8 is attached to the second opening 80B. The fan unit 8 includes a fan 85 including an impeller 83 and a casing 84, a fan cover 86 abutting the casing 84 from the X2 side, a mounting member 87 abutting the casing 84 from the X1 side, and fixing members (not shown) such as bolts for fixing the fan cover 86 and the mounting member 87 to the casing 84.

[0036] As shown in FIG. 4, the casing 84 includes an outer plate 84a that abuts against the fan cover 86, an inner plate 84b parallel to the outer plate 84a, and a body portion 84c that connects the outer plate 84a and the inner plate 84b and surrounds the impeller 83. The casing 84 is rectangular when viewed from the second direction X. The casing 84 has through holes 84d that penetrate four corners in the second direction X. Two of the four through holes 84d are used to fix the fan cover 86 and the mounting member 87 to the casing 84.

[0037] As shown in FIGS. 4 and 5, the mounting member 87 is a plate having a Z-shaped cross section, which includes a side plate portion 87a parallel to the XY plane and elongated in the third direction Y, a support plate portion 87b extending in the Z2 direction from the edge on the X1 side of the side plate portion 87a, and a mounting plate portion 87c extending in the Z1 direction (i.e., the side opposite to the support plate portion 87b) from the edge on the X2 side of the side plate portion 87a. The support plate portion 87b abuts against the inner plate 84b of the casing 84 from the X1 side. Two through holes 87d provided in the support plate portion 87b overlap with the through holes 84d of the casing 84. Further, fixing holes 87e for fixing the fan unit 8 to the back plate 2b are provided at both ends of the mounting plate portion 87c in the third direction Y.

[0038] The fan cover 86 includes a flat plate portion 86a that abuts against the outer plate 84a of the casing 84. A number of ventilation holes are provided in the flat plate portion 86a. As shown in FIG. 5(b), a first edge portion 86b, which is the edge portion on the Y2 side of the flat plate portion 86a, includes an extension portion 86c that extends outside the casing 84. Further, two through holes 86f that overlap with the through holes 84d of the casing 84 are provided in a second edge portion 86d, which is the edge portion on the Z1 side of the flat plate portion 86a. When assembling the fan unit 8, the mounting plate portion 87c is arranged on the outer peripheral side (Z1 side) of the second edge portion 86d.

[0039] The fan cover 86 includes a bent plate portion 86e that is bent at a substantially right angle from the tip of the extending portion 86c toward the X1 side. As shown in FIG. 5(a), the extending portion 86c and the bent plate portion 86e constitute a wiring passage 89 that extends in the first direction Z along the side surface on the Y2 side of the casing 84. The wiring passage 89 extends to the corner where the first edge portion 86b and the second edge portion 86d of the fan cover 86 intersect. The casing 84 includes a wiring groove 90 provided in the outer plate 84a and a wiring holding portion 91 provided at the edge of the inner plate 84b. The wiring groove 90 extends to the edge of the outer plate 84a and is connected to the wiring passage 89. The wiring 92 of the fan 85 drawn out from the casing 84 is drawn out from the wiring groove 90 to the wiring passage 89, held by the wiring holding portion 91, and drawn out from the fan unit 8 in the X1 direction.

[0040] FIG. 6 is a cross-sectional view of the first fan unit 8A and the housing 2 arranged on the Y2 side, and is a cross-sectional view taken along the A-A position in FIG. 1. FIG. 7 is a cross-sectional view of the second fan unit 8 B and the housing 2, and is a cross-sectional view taken along the B-B position in FIG. 1. As shown in FIGS. 3 and 6, the mounting posture of the first fan unit 8A is such that the mounting plate portion 87c extends to the Z2 side of the fan cover 86. The mounting plate portion 87c is inserted inside the edge on the Z2 side of the first opening 80A and fixed to the back plate 2b by a fixing member 88 (see FIG. 6) such as a bolt.

[0041] As shown in FIG. 3, since the first opening 80A is provided at a position offset from the edge on the Z1 side of the back plate 2b, the first fan unit 8A attached to the first opening 80A faces the edge of the control circuit board 4 fixed to the bottom plate 2e. When attaching and detaching the first fan unit 8A to and from the housing 2, the mounting plate portion 87c is inserted inside the edge on the Z2 side of the back plate 2b, and the first fan unit 8A is tilted in the direction of arrow C1 in FIG. 6. Thereby, since access can be made to the first connector 82A arranged at the edge of the control circuit board 4, the wiring 92 of the first fan unit 8A can be connected to the first connector 82A.

[0042] In this embodiment, by changing the orientation of the same fan unit 8, the posture of the fan unit 8 is optimized according to the position of the opening 80. As shown in FIGS. 3 and 7, the mounting posture of the second fan unit 8B is such that the mounting plate portion 87c extends to the Z1 side of the fan cover 86. That is, the mounting posture of the second fan unit 8B is a posture in which the first fan unit 8A is rotated 180 degrees about an axis perpendicular to the fan cover 86. The mounting plate portion 87c of the second fan unit 8B is inserted inside the Z1-side edge of the second opening 80B and fixed to the back plate 2b by a fixing member 88 such as a bolt (see FIG. 7).

[0043] As shown in FIGS. 3 and 7, the second opening 80B is provided at a position offset from the Z2-side edge of the back plate 2b. Therefore, since the second fan unit 8B does not face the control circuit board 4, it is difficult to access the second connector 82B from the second opening 80B. Accordingly, the mounting operation of the second fan unit 8B is performed with the first fan unit 8A not mounted. When attaching / detaching the second fan unit 8B to / from the housing 2, the mounting plate portion 87c is inserted into the Z1-side edge of the second opening 80, and the second fan unit 8B is tilted in the direction of arrow C2 in FIG. 7. Then, the wiring of the second fan unit 8B is extended from the second opening 80B to the inside of the housing 2, and access is made to the second connector 82B from the first opening 80A to connect the wiring 92.

[0044] As shown in FIG. 3, in the mounting posture of the second fan unit 8B, the wiring passage 89 formed by the extending portion 86c and the bent plate portion 86e of the fan cover 86 is disposed at the end on the Y2 side (i.e., the first opening 80A side) of the second fan unit 8B. Therefore, since the wiring 92 of the second fan unit 8B can be drawn out to a position close to the first opening 80A, the operation of connecting the wiring 92 of the second fan unit 8B to the second connector 82B can be easily performed from the first opening 80A.

[0045] As shown in FIGS. 6 and 7, the mounting plate portions 87c of the first fan unit 8A and the second fan unit 8B are located on the same plane as the outer plate 84a of the casing 84, and are arranged at a position recessed toward the X1 side (i.e., the casing 84 side) from the fan cover 86. In this embodiment, the step in the second direction X between the fan cover 86 and the mounting plate portion 87c coincides with the thickness of the back plate 2b. Therefore, when the first fan unit 8A and the second fan unit 8B are fixed to the housing 2, the fan cover 86 and the back plate 2b are arranged on the same plane, and no step is generated at the boundary between the fan cover 86 and the back plate 2b.

[0046] (Main effects of this embodiment) As described above, the controller 1 of the present invention includes a housing 2, a fan unit 8 detachably attached to the opening 80 of the housing 2, and a control circuit board 4 housed in the housing 2. The fan unit 8 includes a fan 85 including an impeller 83 and a casing 84, a fan cover 86 that abuts against the casing 84, and a mounting member 87 that abuts against the casing 84 from the side opposite to the fan cover 86. The mounting member 87 includes a mounting plate portion 87c that extends outside the fan cover 86 as viewed from the direction (X2 direction) facing the fan cover 86 and is fixed to the edge of the opening 80. Further, the fan cover 86 includes an extending portion 86c that extends outside the casing 84, and a bent plate portion 86e that bends from the tip of the extending portion 86c toward the casing 84 side (X1 side). The wiring 92 of the fan 85 is arranged in a wiring passage 89 between the bent plate portion 86e and the casing 84.

[0047] In the fan unit 8 of this embodiment, the fan 85, the fan cover 86, and the mounting member 87 are pre-assembled and unitized, and a wiring passage 89 through which the wiring 92 of the fan 85 can be drawn out is provided between the fan cover 86 and the casing 84 of the fan 85. Therefore, the workability when attaching and detaching the fan to and from the housing 2 is good and the man-hours are few. For example, with the mounting plate portion 87c as the center, the entire fan unit 8 can be tilted with respect to the opening 80, and the work of connecting the wiring 92 of the fan 85 to the power supply connector 82 arranged inside the opening 80 can be easily performed. Further, after connecting the wiring 92, the fixing work using screws or the like can be easily performed while visually checking the overlapping portion between the mounting plate portion 87c and the edge of the opening 80.

[0048] In this embodiment, the fan cover 86 and the casing 84 are rectangular when viewed from the second direction X. The fan cover 86 includes a first edge portion 86b provided with an extension portion 86c constituting the wiring passage 89 and a second edge portion 86d intersecting the first edge portion 86b, and the mounting plate portion 87c extends outside the second edge portion 86d. Since the wiring passage 89 extends to the corner where the first edge portion 86b and the second edge portion 86d intersect, when assembling the fan unit 8, the wiring 92 can be drawn out from the wiring passage 89 to near the mounting plate portion 87c provided on the second edge portion 86d. Therefore, since the wiring 92 can be drawn out near the power supply connector 82 arranged inside the opening 80, the work of connecting the wiring 92 to the connector 82 is easy.

[0049] In this embodiment, the casing 84 is provided with a wiring groove 90 that leads to a wiring passage 89. Therefore, since the wiring 92 can be arranged in the wiring groove 90 to assemble the fan unit 8, the wiring 92 of the fan 85 can be easily drawn out to the wiring passage 89. For example, when the casing 84 includes an outer plate 84a against which the fan cover 86 abuts, an inner plate 84b against which the mounting member 87 abuts, and a body portion 84c that connects the outer plate 84a and the inner plate 84b and surrounds the impeller 83, the wiring groove 90 can be provided in the outer plate 84a. Also, a wiring holding portion 91 is provided at the edge of the inner plate 84b. Therefore, since the wiring 92 whose direction has been changed so as to face the inside (X1 side) of the housing 2 can be held by the wiring holding portion 91, the workability when connecting the wiring 92 to the connector 82 arranged inside the housing 2 is good.

[0050] In this embodiment, the housing 2 includes a back plate 2b which is an exterior plate provided with an opening 80, and the mounting plate portion 87c of the fan unit 8 is inserted inside the back plate 2b. Therefore, with the mounting plate portion 87c hooked on the back plate 2b, the work of tilting the fan unit 8 about the edge of the opening 80 and connecting the wiring 92 to the connector 82 can be performed. Thus, the workability when attaching and detaching the fan unit 8 is good. Also, the mounting plate portion 87c is arranged at a position recessed toward the casing 84 side from the fan cover 86, and there is a step between the mounting plate portion 87c and the fan cover 86. Therefore, when the mounting plate portion 87c is inserted inside the back plate 2b, the step at the boundary between the back plate 2b and the fan cover 86 can be eliminated.

[0051] In this embodiment, the control circuit board 4 faces the back plate 2b, the opening 80 provided in the back plate 2b faces the edge of the control circuit board 4, and a power supply connector 82 connected to the wiring 92 is arranged at the edge of the control circuit board 4. Therefore, since it is easy to access the power supply connector 82 from the opening 80, the wiring 92 of the fan 85 can be directly connected to the connector 82 on the control circuit board 4 without using a relay connector or the like. Also, since the cooling air flowing along the substrate can be formed by driving the fan 85, the cooling effect on the control circuit board 4 is high.

[0052] In this embodiment, as the opening 80 where the fan unit 8 is disposed, there are provided a first opening 80A disposed at a position closer to the edge on the Z1 side than the edge on the Z2 side of the back plate 2b, and a second opening 80B disposed at a position closer to the edge on the Z2 side than the edge on the Z1 side. The second fan unit 8B attached to the second opening 80B is in a posture rotated 180° around an axis perpendicular to the fan cover 86 with respect to the first fan unit 8A attached to the first opening 80A. In this way, by shifting the positions of the first opening 80A and the second opening 80B, the cooling air can be configured to flow in a wide range, so that the cooling effect can be enhanced. Further, even when the positions of the first opening 80A and the second opening 80B are shifted, by rotating and attaching the two fan units 8 having the same configuration by 180 degrees, the positions of the mounting plate portion 87c and the wiring passage 89 can be optimized. That is, by arranging the mounting plate portions 87c of the two fan units 8 on the opposite sides in the first direction Z, the first opening 80A and the second opening 80B can be arranged with a larger shift in the first direction Z than when the mounting plate portions 87c are arranged on the same side. Therefore, the cooling air can be configured to flow in a wide range. Further, since the wirings 92 of the two fan units 8 can be routed in close positions, the wiring work can be made efficient.

Explanation of Reference Numerals

[0053] 1... Controller, 2... Housing, 2a... Front panel, 2b... Rear panel, 2c... First side panel, 2d... Second side panel, 2e... Bottom plate, 2f... Top plate, 2g... Step pin, 2i... Vent hole, 4... Control circuit board, 5... Drive circuit board unit, 6... Drive power supply circuit board unit, 7... Power supply unit, 8... Fan unit, 8A... First fan unit, 8B... Second fan unit, 9... Reinforcing member, 10... Power cover, 11... Fuse, 12... Noise filter, 21... First case, 22... Second case, 23... First interface panel, 24... Second interface panel, 25... Housing frame, 26... Front frame, 27... Rear frame, 28... Side frame, 34... External connection connector, 51... Drive circuit board, 52... Heat dissipation member, 53... Board holder, 56... Output connector, 57... Wiring, 58... Noise removal ring, 59... External output connector, 64... Capacitor, 70... External power supply connector, 80... Opening, 80A... First opening, 80B... Second opening, 81A... Fixing hole, 81B... Fixing hole, 82... Connector, 82A... First connector, 82B... Second connector, 83... Impeller, 84... Casing, 84a... Outer plate, 84b... Inner plate, 84c... Body portion, 84d... Through hole, 85... Fan, 86... Fan cover, 86a... Flat plate portion, 86b... First edge portion, 86c... Extension portion, 86d... Second edge portion, 86e... Bent plate portion, 86f... Through hole, 87... Mounting member, 87a... Side plate portion, 87b... Support plate portion, 87c... Mounting plate portion, 87d... Through hole, 87e... Fixing hole, 88... Fixing member, 89... Wiring path, 90... Wiring groove, 91... Wiring holding portion, 92... Wiring, 93... Vent hole, X... Second direction, Y... Third direction, Z... First direction

Claims

1. A controller comprising: a housing; a fan unit detachably attached to an opening of the housing; and a substrate housed in the housing, wherein the fan unit includes: a fan including an impeller and a casing; a fan cover contacting the casing; and a mounting member contacting the casing from a side opposite to the fan cover. The mounting member includes a mounting plate portion extending outside the fan cover as viewed from a direction facing the fan cover and fixed to an edge of the opening. The fan cover includes a first edge portion provided with an extending portion extending outside the casing, and a bent plate portion bent from a tip of the extending portion toward the casing side. The bent plate portion and the extending portion constitute a wiring passage extending along a side surface of the casing in a direction along the first edge portion, and wiring of the fan is arranged in the wiring passage.

2. The fan cover and the casing are rectangular, the fan cover includes a second edge portion intersecting the first edge portion, and the mounting plate portion extends outside the second edge portion, and the wiring passage extends to a corner where the first edge portion and the second edge portion intersect. The controller according to claim 1.

3. The controller according to claim 1 or 2, wherein a wiring groove connected to the wiring passage is provided in the casing.

4. The casing includes an outer plate with which the fan cover contacts, an inner plate with which the mounting member contacts, and a body portion connecting the outer plate and the inner plate and surrounding the impeller. The controller according to any one of claims 1 to 3, wherein a wiring holding portion is provided at an edge of the inner plate.

5. The housing includes an exterior plate provided with the opening, and the mounting plate portion is located on the casing side of the fan cover and inserted inside the exterior plate. The controller according to any one of claims 1 to 4.

6. The opening faces an edge of the substrate, and a power supply connector connected to the wiring is arranged at the edge. The controller according to any one of claims 1 to 5.

7. The housing includes an exterior plate provided with the opening, As the opening, a first opening disposed at a position closer to the other edge of the exterior plate than one edge of the exterior plate, and a second opening disposed at a position closer to the one edge than the other edge are provided. The fan unit attached to the second opening is characterized in that it is in a posture rotated 180° around an axis perpendicular to the fan cover with respect to the fan unit attached to the first opening, according to any one of claims 1 to 6.

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