JP2000031678A - Numeric controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical control apparatus in which a first connector which is wired from a power supply terminal can be connected with a second connector, wired from a fan motor upon setting a fan unit in a housing, and assembling and maintenance work is facilitated. SOLUTION: This numerical control apparatus 1 comprises a housing 2, a board 3 contained in the housing 2, a branch board 4 mounted on the rear surface of the housing 2, a fan motor 29, and a fan unit 5 fixed removably to the upper surface of the housing 2. A first connector 20 connected with a power supply terminal 19 is either secured to the housing 2 or mounted on the branch board 4 and a second connector 21 which is wired from the fan motor 29 and is removably and connectible with the first connector 20 is located at a position facing the first connector 20, when the fan unit 5 is set in the housing 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller having a cooling fan.

[0002]

2. Description of the Related Art A numerical control device in which a board unit composed of a plurality of boards is housed in a housing is provided with a cooling fan motor in order to prevent an internal temperature rise. The fan motor is mounted on a fan cover, and the fan motor is generally mounted on the housing by fixing the fan cover to the upper surface of the housing using screws or the like.

[0003] Further, on the back of the housing, there is provided a connection branching board for performing wiring work for connecting the boards or the board unit and the board unit of another numerical controller, and is usually provided with a fan motor. With respect to the power supply, the power supply terminal of the branch board and the terminal on the fan motor side are connected by a lead wire. However, in this method, wiring work on site is increased and assembly is troublesome, and in many cases, wiring is difficult due to small space and manual wiring is difficult. It was bad.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to connect a first connector wired from a power supply terminal and a second connector wired from a fan motor at the same time as incorporating a fan unit into a housing. Another object of the present invention is to provide a numerical control device that can be easily assembled and maintained.

[0005]

A numerical controller according to the present invention comprises a housing, a board housed in the housing, a fan unit having a fan motor and removably mounted on an upper surface of the housing. A first connector wired from a power supply terminal is fixed to a housing, and a fan unit is wired from a fan motor at a position facing the first connector in a state where the fan unit is incorporated into the housing, and is connected to the first connector. A second connector that can be connected and extracted is provided. In some cases, a branching board for connecting a board is provided on the rear surface of the housing, and the first connector is directly mounted on the branching board and connected to a power supply terminal. When the fan unit is set on the upper surface of the housing, the first connector and the second connector can be automatically connected to face each other. When the first connector and the second connector are connected, the fan motor is electrically connected to the power supply.

The branch board, the fan unit and the housing are
Locking means which are snap-fitted to each other may be provided. This eliminates the necessity of a joining operation using a fixture such as a screw for assembling the branching board and the fan unit with the housing, so that assembly and maintenance are easy, and the number of parts is reduced. Also, the second connector is a fan unit,
It is also possible to attach it so that the position can be moved. If the first connector is displaced from the second connector when the fan unit is incorporated in the housing, the second connector is moved to absorb the position error.

[0007]

1 to 11 show a first embodiment of the present invention.
An embodiment will be described. As shown in FIGS. 1 to 3, a numerical control device 1 of the present invention includes a housing 2, a board unit including a plurality of boards 3 such as a power supply board and a control board housed in the housing 2, and a housing 2. The connecting branch board 4 for connecting the board 3 provided on the rear surface of the fan unit 5, the fan unit 5 detachably attached to the upper surface of the housing 2, the first connector 20 fixed to the housing 2, and the fan unit 5. And a second connector 21 attached thereto.

The housing 2 is made of a plastic molded body and, as shown in FIG.
And a substrate storage space 10 whose front surface is opened below the top plate 6 is formed. Further, a fan unit storage space 11 whose upper surface is open is formed above the top plate 6, and an opening 7 for communicating the substrate storage space 10 and the fan unit storage space 11 is formed in the top plate 6. ing. Further, a plurality of guide grooves 8 are formed on the bottom surface and the upper surface of the substrate storage space 10 in the front-rear direction, and the upper and lower ends of the substrate 3 are fitted into these guide grooves 8 so that the substrate storage space is opened from the front surface. The substrate 3 can be slid and inserted into the space 10 to support it. At the front end of the substrate 3, a front cover 9 of a plastic molded body that covers the front surface of the housing 2 is attached.

Long slots 12 are formed in the front and rear sides of the fan unit storage space 11 near the rear of both sides, respectively. L-shaped notch 1 that is bent outward
3 is formed. Further, as shown in FIGS. 2 and 3,
The first connector 2 is provided on the rear surface of the fan unit storage space 11.
A window portion 14 is formed for fitting the snap engagement branch 42 having an elasticity and an upward hook formed at the tip thereof from the substantially central portion of the window portion 14 toward the rear. It is protruding. Further, connector support protrusions 15 are projected rearward from both sides of the window portion 14, respectively.

As shown in FIGS. 2 and 4, a hook-shaped piece 16 is formed at the four corners of the rear surface of the substrate storage space 10 by cutting and raising the wall surface and bending the tip thereof downward. In addition, a locking projection 17 having a tapered surface inclined upward and rearward is projected from the center of the rear surface of the substrate storage space 10. Further, positioning protrusions 18 are mounted on appropriate positions on the rear surface of the housing 2.

The branch board 4 connects the boards 3 to each other, and connects the board 3 to an external device or a board unit and a board unit built in another numerical controller. As shown in FIG. It is detachably mounted on the rear surface of the substrate storage space 10. As shown in FIGS. 1 and 2, a power supply terminal 19 is provided at the upper end of the branch board 4, and a terminal 23 connected to the terminal 22 of each board 3 is provided at an appropriate location on the front surface. . The terminals 23 ′ attached to the front side of the branch board 4 so as to protrude laterally are for connecting the terminals of the extension board when the extension board is attached to the side surface of the housing 2. . At four corners of the branch board 4, through holes 24 are formed to be engaged with the hook-shaped pieces 16 of the housing 2.
8, a positioning hole 26 is formed. A through hole 25 is formed in the center of the branch board 4 so as to be snap-engaged with the locking projection 17 and serve as a locking means between the housing 2 and the branch board 4.

In order to attach the dividing board 4 to the housing 2, the dividing board 4 is moved upward and forward to approach the housing 2, and as shown in FIG. The projections 17 are engaged with the through holes 24 and the through holes 25 of the branch board 4, respectively. Then, the branching board 4 pushes the tapered surface of the locking projection 17 to bend the locking projection 17 forward, and when the through-hole 25 coincides with the locking projection 17, the two snap-engage.

The fan unit 5 is, as shown in FIG.
The cooling fan motor 29 is mounted on the lower surface of the fan cover 28. Both end portions of the fan cover 28 are bent downward to form side walls 30, and ridges 31 to be engaged with the cutouts 13 of the housing 2 project from the outer surface of the lower end of the front end portion. Also, the rear portions of the side walls 30 on both sides are cut off to an appropriate width to form elastic arms 32, respectively, and a protruding shaft 33 protrudes from the lower end outer surface of the elastic arm 32. The projecting shaft 33 is snap-engaged with the long hole 12 of the housing 2,
And a locking unit for the fan unit 5. further,
As shown in FIG. 3, a pair of left and right support pieces 34 are provided downward near the rear part of the fan cover 28, and a protrusion 35 is formed on the rear surface of the lower end of the support piece. These protrusions 35 are formed at positions corresponding to the connector support protrusions 15 of the housing 2.

To attach the fan unit 5 to the housing 2, the elastic arm 32 is pushed slightly inward, and the side wall 30 and the ridge 31 of the fan unit 5 are
3 so that the fan unit storage space 11
The fan unit 5 is slid backward from the front of the fan unit 5. Then, the protruding shaft 33 is pushed by both sides of the fan unit storage space 11 and the elastic arm 32 is retracted inward. When the protruding shaft 33 reaches the elongated hole 12, the elastic arm 32 returns to the original position, and The shaft 33 and the long hole 12 snap-fit.

As shown in FIGS. 5 to 7, the first connector 20 is formed by fixing pieces 38 projecting from both sides of the connector main body 37. From the front surface of the connector main body 37, an insertion portion having a terminal at a tip is provided. A fixing hole 39 is formed in the fixing piece 38. Further, the relay cable 41 is pulled out from the connector main body 37, and the branching board 4 is
The third connector 43 connected to the power supply terminal 19 is mounted.

The first connector 20 is connected to the housing 2 as follows.
To be fixed. The snap engagement branch 42 is brought into contact with the center of the lower surface of the connector body 37 so that the insertion portion 36 of the first connector 20 faces the fan unit storage space 11 of the housing 2, and the connector body 37 is fitted into the window 14. Combine. Next, the first connector 20 is fixed by inserting the connector support protrusions 15 of the housing 2 into the fixing holes 39 respectively. Then, by connecting the third connector 43 to the power supply terminal 19, the first connector 20 fixed to the housing 2 and the power supply terminal 19 are electrically connected via the relay cable 41.

As shown in FIGS. 8 to 10, the second connector 21 is formed by projecting fixing pieces 48 from both sides of the connector main body 45. On the rear surface of the connector body 45, a receiving portion 44 having a terminal at the back is provided.
As shown in FIG. 7, the distal end of the inner peripheral surface of the receiving portion 44 has a tapered surface inclined outward in the distal end direction so that the insertion portion 36 can be easily inserted. Also, the fixing piece 48 has a structure shown in FIG.
As shown in FIG. 0 and FIG. 11, a mounting hole 46 is formed, and a thread-shaped member 47 having a slightly smaller diameter than the mounting hole 46 is restricted from sliding in the axial direction. Are movably inserted within the range of. Further, as shown in FIG.
The first connector body 45 and the fan motor 29 are electrically connected via a lead wire 49.

The second connector 21 has its receiving portion 4
By attaching the projection 35 formed on the fan cover 28 to the center space of the thread-shaped member 47 with the 4 facing rearward, the fan unit 5 is attached to the fan unit 5. When the fan unit 5 is installed in the fan unit storage space 11 of the housing 2 as described above, the receiving portion 44 of the second connector 21 is arranged at a position facing the insertion portion 36 of the first connector 20, and The first connector 20 and the second connector 21 can be connected. When the insertion portion 36 is inserted into the receiving portion 44, both terminals come into contact with each other, and the drive power is supplied from the power supply terminal 19 of the branch board 4 to the fan motor 29.

Since the thread-shaped member 47 of the second connector 21 is movable with respect to the mounting hole 46 of the fixing piece 48, the projection 35 and the fixing piece 48 inserted into the thread-shaped member 47 can also move with each other. Therefore, the second connector 21 can move relative to the connector main body 45. For this reason,
When the fan unit 5 is attached to the housing 2, even if the insertion part 36 of the first connector 20 and the receiving part 44 of the second connector 21 are slightly misaligned, the connector body 45 of the second connector 21 By moving, this position error can be absorbed.

FIG. 12 shows a second embodiment of the present invention. In the numerical control device 1 of the present embodiment, the upper end of the branch board 4 is partially extended upward to form a projection 51 reaching the window 14 of the housing 2, and the first projection 51 is directly provided on the front surface of the projection 51.
And the first connector 50 is connected to a power supply terminal. Therefore, when the branch board 4 is attached to the housing 2, the first connector 50 is automatically connected to the fan unit storage space 11 through the window 14 of the housing 2.
Is placed within. In this case, it is not necessary to provide the connector support protrusion 15 and the snap engagement branch 42 on the housing 2. Other configurations are almost the same as those of the embodiment shown in FIGS. 1 to 11, and therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

[0021]

According to the structure of the first or second aspect, the first connector for supplying power from the power supply and the second connector wired from the fan motor at the same time when the fan unit is incorporated in the housing. Can be connected, so that the wiring work is not troublesome, so that the work efficiency at the time of assembly and maintenance is good.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a numerical control device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the above.

FIG. 3 is a longitudinal sectional view of the above.

FIG. 4 is a vertical cross-sectional view of a joint between a branch board and a housing.

FIG. 5 is a plan view of the first connector.

FIG. 6 is a front view of the above.

FIG. 7 is a side view of the above.

FIG. 8 is a plan view of a second connector.

FIG. 9 is a rear view of the above.

FIG. 10 is a side view of the above.

FIG. 11 is a diagram showing a positional relationship between a mounting hole and a thread-shaped member when the second connector moves.

FIG. 12 is an exploded perspective view of a numerical control device showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Numerical control apparatus 2 Housing 3 Substrate 4 Dividing board 5 Fan unit 6 Top plate 7 Opening 8 Guide groove 9 Front cover 10 Substrate storage space 11 Fan unit storage space 12 Slot 13 Notch 14 Window 15 Connector support protrusion 16 Hook-shaped piece 17 Locking projection 18 Positioning projection 19 Power supply terminal 20 First connector 21 Second connector 22, 23, 23 'Terminal 24 Through hole 25 Through hole 26 Positioning hole 28 Fan cover 29 Fan motor 30 Side wall 31 Projection 32 elastic arm 33 projecting shaft 34 supporting piece 35 projecting part 36 insertion part 37 connector body 38 fixing piece 39 fixing hole 41 relay cable 42 snap engaging branch 43 third connector 44 receiving part 45 connector body 46 mounting hole 47 thread winding member 48 Fixing piece 49 Lead wire 50 First connector 5 1 Projection

Claims (2)

[Claims] 1. A numerical control device comprising: a housing; a board housed in the housing; and a fan unit having a fan motor and detachably mounted on an upper surface of the housing. The wired first connector is fixed to the housing, and the fan unit is wired from the fan motor to a position facing the first connector when the fan unit is installed in the housing, and the first connector A second connector which can be connected to and removed from the numerical controller. 2. A housing having a housing, a board housed in the housing, a connection branch board for connecting a board provided on a rear surface of the housing, and a fan motor, and being detachably mounted on an upper surface of the housing. A numerical controller including a mounted fan unit, wherein the first connector is mounted and disposed directly on the branch board, connected to a power supply terminal, and the fan unit is mounted in the housing in the housing. A numerical control device, wherein a second connector is provided at a position facing the first connector, the second connector being capable of being connected to and removed from the first connector while being wired from the fan motor.