JP2924566B2 - Housing and power panel using this housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for accommodating a high frequency power supply for a laser beam machine and the like, and to an improvement in a power supply panel of the housing using the housing.

[0002]

2. Description of the Related Art A power supply panel used for laser processing obtains discharge power by converting DC power obtained by rectifying AC power into AC power by an inverter and then boosting the power by a transformer. In general,
Since the output capacity of the inverter is several kW or more, a plurality of inverters are connected in parallel. The laser oscillator fixed to the top plate of the power supply panel is configured to emit a laser beam and guide it to a processing machine adjacent to the rear side of the power supply panel.

On the other hand, the housing of the power supply panel is configured to have a high rigidity by welding a large number of strong groove-shaped members in combination to support a laser oscillator of several hundred kg. Further, in order to install the laser oscillator horizontally, a leveling bolt is provided at the bottom of the power panel to adjust the level. Furthermore, the housing has caused a dimensional change due to thermal expansion due to a temperature rise due to heat generation in the power supply panel, causing a change in the optical axis of the laser beam.

[0004] The assembling operation of a conventional power panel will be described below. First, after the components of the housing are turned sideways, a side frame, a top frame and the like are formed using a jig to form a rectangular frame, and sub-welding is performed. Welded after configuring. Next, after erecting the housing, work such as welding on the back side was performed.

On the other hand, as an improvement of the conventional technique described in Japanese Patent Application Laid-Open No. 5-15016, a notch is provided in the upper and lower inner bending portions of the side plate, and both ends of a support member are fitted into the notch. In some cases, it is positioned and welded. But,
When positioning and welding the side plate, the top plate, and the bottom plate, a special jig must be used for positioning, and the work has been complicated. Furthermore, it is necessary to design and manufacture a special jig.

[0006] Further, since it is not possible to make the housing of the power supply panel stand alone for welding, the operator has performed welding in an unnatural posture. Furthermore, since the load on the mounting position of the leveling bolt on the bottom plate is not sufficiently considered, local deformation is likely to occur on the bottom plate.

A unit having a large amount of heat stored in the power supply panel is forcibly cooled by a cooling fan, but a laser oscillator is mounted on a ceiling of the power supply panel, and a processing machine is installed on a rear side. Therefore, exhaust from the unit cannot be discharged straight upward or to the rear side. Therefore,
The air is sucked in from the lower front back of the power panel and exhausted from the upper front of the power panel.However, this method tends to cause bad airflow distribution such as high pressure loss, local short-circuit airflow, etc. There has been a problem that this causes a rise, which in turn causes a non-uniform dimensional variation of the housing due to thermal expansion.

Japanese Unexamined Patent Publication No. Hei 2-82693 as a prior art for improving the efficiency of discharging air from a housing is disclosed in Japanese Patent Application Laid-Open No. 2-82693. Has an intake port and an exhaust fan. However, when the unit is fixed in the compartment, a gap is formed between the compartment and the unit. When the mounting density of the unit is high, the convection of cooling is discharged through the gap with low air resistance, and the temperature becomes locally high. It was easy. Therefore, the dimensional change of the housing due to thermal expansion has occurred.

Further, since the power panel has a top plate area corresponding to the oscillator, even if the output of the inverter is reduced, an unnecessary unit partition cannot be effectively used.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and has as its object to position a lip groove-shaped side plate with a top plate and a bottom plate. An object of the present invention is to obtain a housing that can be easily welded by a worker after assembling the housing via a support without using a special jig and that makes the housing of the power panel independent, and that has high rigidity.

Another object is to prevent local deformation of a bottom plate provided with a leveling bolt.

Still another object is that when the unit is fixed in the compartment, a gap is formed between the compartment and the unit, and when the mounting density of the unit is high, the convection of cooling is discharged through the gap having a small air resistance. Another object of the present invention is to prevent the temperature from becoming high locally.

Another object of the present invention is to prevent the power panel from becoming locally high in temperature by discharging exhaust gas from the radiating fins obliquely upward on the rear side.

Still another object is to suppress a rise in temperature in the power supply panel by effectively using unnecessary unit partitions even if the output of the inverter is reduced since the power supply panel has a top plate area corresponding to the oscillator. It is in.

[0015]

A housing according to claim 1 is
Bottom plate, a side plate provided on the left and right supporting between the top plate, a pair of front and back columns, a door provided on the front, and a back plate provided on the back, the bottom plate and the top plate, A vertical leg is provided at both front and rear edges of the horizontal portion, and a bent leg extending inward from the vertical leg edge is provided. The cross section is formed in a lip groove shape, and side plates are provided at both end edges of the side portion, respectively. A width leg having a pair of widths, and an inwardly bent leg extending inward from an edge of the width leg, the cross section is formed in a lip groove shape, and the column is formed in a groove shape in cross section, and a bottom plate is provided. The bent legs of the top plate are provided with cutouts corresponding to the positions of the side plates and the struts, and the projections formed at the upper and lower ends of the inner bent legs of the side plates and the struts are formed by cutting the bottom plate and the top plate. The protrusion is fitted into the notch, and the tip of the protrusion is brought into contact with the inner surfaces of the top plate and the bottom plate. It is characterized in that the finely the fitting portion is welded.

According to a second aspect of the present invention, the projections of the side plates and the columns are fixed to the horizontal portions of the bottom plate and the top plate.
Nuts for screwing the leveling bolts are fixed to the bottom side of the bottom plate located between the lip groove-shaped grooves formed on the side plate and between the groove-shaped grooves formed on the column. It is a feature.

According to a third aspect of the present invention, there is provided a power supply panel for connecting a bottom plate and a top plate.
A pair of front and back posts to support, a door provided on the front,
A housing comprising a back plate provided on the surface, a cooling fan arranged on the end surface of the fin of the heat sink and cooling the fin, and a main circuit portion including a semiconductor module fixed to the heat receiving plate of the heat sink. , A unit including a board disposed on the front of the main circuit section, a unit case mounted in a housing for housing the unit, an exhaust fan mounted on an upper part of the door, and a heat sink on a lower part of the door. A power supply panel provided with a dustproof filter disposed at an intake port provided below the lower end surface, wherein the unit case is opened up and down, and left and right unit side plates,
And a unit front plate and the unit back plate positioned above the lower end surface of the heat sink, in the unit case
A vertical air path is formed, and the left and right unit side plates are
A unit case consisting of a unit front panel and a unit rear panel
The gap between the outer periphery of the heat sink and the inner
Closed by a closing member provided on the lower end surface of the
To prevent outside air from being guided into the gap
It is characterized in that it is configured to be guided to an air path in a unit case .

According to a fourth aspect of the present invention, the power panel includes a horizontal leg of a rail for fixing the unit case as a closing member ;
From the lower end of the unit front panel and the unit rear panel
It is characterized by comprising an outer bent leg bent horizontally .

A power panel according to a fifth aspect of the present invention includes an exhaust port formed in an upper portion of a back plate, an inclined wall provided on an upper portion of a heat sink, and extending from a heat receiving plate of the heat sink to an upper end of the exhaust port. An exhaust duct having left and right side walls extending from both sides of the inclined wall to the back plate and having an air passage section gradually reduced toward an exhaust port is provided.

According to a sixth aspect of the present invention, there is provided a power panel using a housing, wherein a unit section, which is a plurality of sections formed by side plates and columns, and at least one first unit section of the unit section includes a heat sink. A cooling fan arranged on the fin end surface for cooling the fin, a main circuit portion including a semiconductor module fixed to a heat receiving plate of a heat sink, and a main circuit portion are housed, and a ventilation passage is formed in a vertical direction. A unit and an exhaust fan mounted on the upper part of the back plate, and a second unit section adjacent to the first unit section is formed so as to suck air from an intake port provided with a dustproof filter. And an outside air introduction member that communicates with the lower part of the first unit section and that introduces outside air into the ventilation passage of the unit.

[0021]

According to the housing of the first aspect, the cutouts of the top plate and the bottom plate and the projections of the support and side plates are fitted and welded, so that the housing can be self-supported and rigidity can be increased.

According to the housing of the second aspect, the reaction force applied to the bottom plate from the leveling bolt supporting the weight via the nut is dispersed to the side plate and the projection of the column, and local deformation of the bottom plate is prevented.

According to the power supply panel of the third aspect, the left and right units are
G unit side plate, unit front plate and unit back plate
The gap between the outer circumference of the side of the unit case and the inner side of the housing is
Closed by a closing member provided on the lower end surface of the heat sink
Therefore, airflow loss is prevented.

According to the power supply panel of the fourth aspect, since the closing member is made up of the rail and the unit case, parts can be shared.

According to the power supply panel of the fifth aspect, since the convection generated from the heat sink is discharged to the outside of the power supply panel by the exhaust port formed in the back plate, the exhaust duct having the cross section of the air path gradually reduced toward the exhaust port. , So that the heat of the heat sink is smoothly discharged to the rear side.

According to the power supply panel using the casing of claim 6,
By supplying outside air to the lower part of the unit from an intake chamber having an intake port, the unit section can be effectively used.

[0027]

[Embodiment 1] An embodiment shown in the drawings of the invention according to claims 1 and 2 will be described. In FIG. 1, the power panel according to the present invention includes a top plate and a bottom plate formed in a lip groove shape, left and right side plates, and a support disposed between the side plates. A power supply panel 101 for laser processing has an oscillator 110 for generating a laser beam fixed to the ceiling, and a converter unit 103 and an inverter unit 104 in which units each housing a converter and an inverter are inserted, respectively. Auxiliary parts 105 including auxiliary parts such as an input circuit breaker are housed and arranged side by side.

The housing 1 of the power supply panel 101 is disposed between the bottom plate 2, the top plate 3, the left and right side plates 4, and the left and right side plates 4 as shown in FIG. It has a pair of columns 5 composed of a plurality of columns. 102A, 102B, 102C
Are a converter section, an inverter section, and an auxiliary section for fixing the converter section 103, the inverter section 104, and the auxiliary component section 105 formed by disposing the columns 5 in the housing 1, and these sections are collectively referred to. Called a unit section.

As shown in FIG. 3, the bottom plate 2 has a horizontal portion 2A and vertical legs 2B extending from both front and rear edges of the horizontal portion 2A, and a horizontal bent leg 2C extending inward from the edge of the vertical leg 2B.
And a lip groove shape having the following. Notches 2D and 2E are provided in the bent leg 2C at positions where the support column 5 and the left and right side plates 4 are respectively arranged. The shape of the notch 2E is cut so that the lateral width is equal to the thickness of the side plate 4 and the width in the depth direction matches the protrusion 4D. The shape of the notch 2D is cut so that the lateral width is equal to the width of the column 5 and the width in the depth direction matches the protrusion 5C. The fixing hole 2F is a hole for penetrating the nut 6 for screwing the leveling bolt 7, and the position is determined by the fitting of the projection 4D and the notch 2E and the fitting of the projection 5C and the notch 2D. It is on the bottom plate in the center of the square that is formed. Top plate 3
Are formed in the same lip groove shape as the bottom plate 2, and similarly have a horizontal portion 3A, a vertical leg 3B, and a bent leg 3C.

The bent legs 3C of the top plate 3 also have notches 2D,
The same notch as E is provided (not shown). As shown in FIG. 2, a fixing hole 3F for bolting the oscillator 110 and wiring holes 3G and 3H for passing electric wires are formed in the horizontal portion 3A. The pair of left and right side plates 4
It is formed in the same lip groove shape as the bottom plate 2 and the top plate 3, and similarly has a side surface portion 4A, a width leg 4B, and an inner bending leg 4C. A protruding portion 4D is formed on the back side of the upper and lower ends of the inner bending leg 4C,
Further, extension portions 4E longer than the width legs 4B are formed at upper and lower ends of the side surface portion 4A. The support post 5 is formed in a groove-shaped cross section as shown in FIG. 3, has a bent leg 5B extending inward from both sides of the width leg 5A, and a projection 5C inside the upper and lower ends of the bent leg 5B. Is formed.

Next, the assembling and welding of the housing components will be described. The bottom plate 2 to which the nut 6 is welded to the bottom surface of the bottom plate 2 in advance is made horizontal, and the projection 4D of the side plate 4 is fitted into the notch 2E. The lower end of the width leg 4B of the side plate 4 is in contact with the horizontal bending leg 2C of the bottom plate 2, and the tip of the projection 4D is in contact with the inner surface of the horizontal portion 2A. By this fitting, the side plate 4 can be positioned and self-supporting so that the extension 4E closes the end surface of the bottom plate 2. Next, the protrusion 5C is similarly fitted into the notch 2D. By such fitting,
The column 5 can be positioned and self-standing in accordance with the front and rear surfaces of the bottom plate 2. As described above, the top plate 3 is placed on the upper ends of the left and right side plates 4 and the plurality of columns 5 that are self-supporting, and the projections 4D and 5C that fit into the cutouts of the top plate 3 are fitted. As a result, the top plate 3 is assembled vertically symmetrically with the bottom plate 2. As described above, the components of the housing 1 can be fitted and positioned without using a jig or the like, and the housing 1 can be assembled and stand alone.

Next, the joint between the components of the housing 1 is fillet welded. Since the front and back surfaces of the housing 1 are open for welding to the joining portion, an operator can easily approach and work. Further, it is not always necessary to perform welding at all points and the entire length of the joint between the members in terms of the strength of the joint. However, the protrusion 4D of the side plate 4 and the protrusion 5 of the support 5
It is desired that the joint between C and the inner surface of the bottom plate 2 and the inner surface of the top plate 3 be welded. Bending legs 2C, 3C and horizontal parts 2A, 3
This is because the rigidity of the housing 1 is strengthened by being integrated with A. A leveling bolt 7 is screwed onto a nut 6 welded to the bottom surface of the bottom plate 2. The stress of the load applied via the leveling bolt 7 is dispersed, and local deformation of the housing 1 is prevented. In addition, the housing 1 can be welded in a state where a small number of constituent members are fitted and held at the same position as after completion, so that the number of welding locations is small and the occurrence of welding distortion can be reduced. Case 1
As described above, welding can be completed in a state where all the housing components are held at the same positions as after completion, and can be sent to the painting process as it is.

In the above description, the notches 2D and 2E and the notch of the top plate 3 are provided in a concave shape on the inner edge. However, the shape of the notch is not limited to the above. For example, a similar shape can be obtained even if a square hole is formed on the bent legs 2C and 3C and the projections 4D and 5C are fitted in a convex shape. An effect can be obtained. The leveling bolt 7 is not always necessary when the power panel is installed on a horizontal floor, because the level of the power panel can be adjusted. In such a case, the rigidity required for the housing 1 is reduced because the load is equally borne by the bottom plate. Therefore, it is not always necessary to extend the tips of the projections 4D and 5C until they contact the inner surfaces of the bottom plate 2 and the top plate 3.

Embodiment 2 FIG. An embodiment shown in the drawings of the invention according to claims 3 and 4 will be described. In FIG. 4, the unit 14A includes a substrate 57,
A component that contains components, including an inverter, is stored in a case. However, it goes without saying that the components in the unit are not limited to the above.

First, each component of the unit 14A will be described. In FIG. 4, a board 57 for controlling a module 52 made of a semiconductor is attached to a mounting plate 18 through a spacer 58.
It is fixed to. The mounting plate 18 has side legs 18A as shown in FIGS. 5 and 6, a groove 18B is provided in an upper portion of the side legs 18A, and a hole 18C is formed in a lower portion. It is rotatably supported on the side plate 15 by a pin 19 penetrating through the hole 18C, and is fixed to the side plate 15 by screwing a screw 20 into a groove 18B. The screw 20 can be loosened and turned toward the front door 9; The module 52 and the like can be visually inspected. A heat sink 51 for dissipating heat from the module 52 has a heat receiving plate 51A for fixing the module 52 by screws, and is connected by connection conductors 53 and 54 to constitute an inverter. On both side surfaces of the heat receiving plate 51A, the side plate 15 is screwed and arranged at a position higher than the intake port 11A. Then, a first air passage is formed between the mounting plate 18 and the heat receiving plate 51A.

Next, the unit case 14B for accommodating each component of the unit 14A and the closing member will be described. The unit case 14B includes a side plate 15, a front plate 21,
The side plate 15 has a horizontal leg 15A bent outward at the upper end, a front leg 15B bent outward at the front end, and a rear leg 15C bent inside at the rear end. The front leg 15B is provided with a notch 15D for contacting the rails 13 arranged vertically, and has a fixing hole 15E.

The rear plate 17 is provided with an outer bent leg 17A as a closing member formed at the lower end, and is fixed to the rear leg 15C to close the gap between the rear plate 11 and the rear plate 17. The front plate 21 has an outer bent leg 21A for closing between the door 9 and the front plate 21, and is made of a transparent resin so that rigidity is not required and the inside can be easily visually inspected. The unit case 14B is connected to the heat sink 51, the side plate 15, and the horizontal member 23, and has sufficient rigidity. Fan 5
Numeral 6 is used in tandem to obtain a high static pressure, and is arranged so that the heat sink 51 is cooled by the box-shaped mounting plate 16. As shown in FIG. 5, the gap between the side plate 15 and the column 5 is closed by a horizontal leg 13 </ b> B serving as a closing member disposed at the lower end surface of the heat sink 51. or,
In the U-shaped gap of the column 5, a vertical leg 25A fixed to the vertical leg 13A and an inner bent leg 5B of the column 5 for closing are provided.
A closing plate 25 as a closing member having a horizontal leg 25B extending to the inside is provided. Then, a second air passage is formed between the front plate 21 and the substrate 57.

A member for mounting the unit 14A to the housing 1 will be described. When mounting the unit, the rail 13 for guiding is formed in an L-shaped cross section and has a vertical leg 13A and a horizontal portion 13B used for fixing to the column 5, and is integrally formed at one end of the leg 13A. Fixed ear 1
3C, and a screw hole 13D is screwed into the fixed ear 13C. The horizontal leg 15A is inserted on the horizontal leg 13B, and the front leg 15B is configured to be screwed to the fixed ear 13C.

Next, the structure of the cooling unit and the like will be described. The front door 9 of the inverter unit 104 disposed on the front surface of the bottom plate 2 and the top plate 3 is provided with an intake port 9A for sucking external air at a lower portion, and dust is generated in the intake port 9A at the time of intake. A filter 10 is provided to prevent the heat from entering, and an exhaust port 9B is provided at an upper portion to exhaust heat generated in the inverter unit 104 to the outside, and an exhaust fan 50 is provided at the exhaust port 9B. The back plate 11 provided on the back of the bottom plate 2 and the top plate 3 is provided with a suction port 11A at a lower portion for the same reason as described above, and includes a case 12 so that the filter 10 can be easily replaced. I have.

As shown in FIG. 4, the mounting plate 22
The stabilizing power supply 59 for 7 and the like and the input terminal block 60 are mounted, and the mounting plate 22 is appropriately provided with an opening to reduce resistance to air flow. The horizontal member 23 disposed at the upper front is used as a handle. Also, the transformer 61
Are mounted by a pair of left and right mounting brackets 24. The input terminal 61A of the transformer 61 is connected to the conductor 55, and the output terminal 61B is connected to the oscillator 110 by an electric wire passing through the wiring hole 3G. A drain pan 8 that receives dew condensation water generated by water cooling of the oscillator 110 is provided in an upper portion of the housing 1.

Next, the operation will be described. Now, when the laser beam machine operates, the module 52 generates heat and radiates heat from the heat sink 51 to rotate the fan 56 to promote cooling. In such a case, the convection of the casing 1 is mainly caused by the intake port 11.
First air passage to be discharged air passage to be discharged by the exhaust fan 50 from the arrow 71B intake to as the A arrow 71A, from the intake to the arrow 72B as shown by the arrow 72A from the intake port 9A by the fan 50, Further, the air is taken in from the intake port 9A as shown by the arrow, and is branched from the arrow 73B to the second air path exhausted by the fan 50. Since the gap between the unit case 14B and the housing 1 is closed by the closing member, local airflow loss caused by the gap is prevented. For this reason, the temperature rise in the panel can be suppressed low, and the thermal expansion of the housing 1 can be reduced. Further, since the closing member for preventing the air flow loss uses the rail 13, the unit case 14B, and the like, resource saving can be achieved.

Embodiment 3 FIG. An embodiment of the invention according to claim 5 will be described with reference to FIG. In FIG. 7, an exhaust port 1 for discharging exhaust heat generated from the heat sink 51 to the outside of the power supply panel is provided at the uppermost portion of the back plate 11.
1B is drilled. The exhaust duct 26 is composed of two side walls 26B having a triangular shape and an inclined wall 26A connecting the side walls 26B, and one end of the inclined wall 26A is connected to the exhaust port 11.
The other end is disposed above the fan 56 in contact with the upper part of B. The width of the inclined wall 26A is substantially the same as the width of the unit case 14B. Here, the reason why the intake port of the exhaust duct 26 is arranged above the fan 56 is to reduce the air path loss. The exhaust duct 26 is fixed to the column 5 or the back plate 11. The opening area of the exhaust port 11B is formed smaller than the suction area at the lower end of the exhaust duct 26. This is to increase the outflow speed of the air exhausted from the exhaust port 11B.

Next, the operation will be described. The warmed exhaust air generated from the heat sink 51 is guided into the exhaust duct 26 from the arrow 71A through the fan 56 and is directed to the inclined wall 2.
The air is deflected by 6A and is exhausted obliquely upward from the exhaust port 11B as indicated by an arrow 74. The exhaust gas 74 is discharged above a processing machine installed adjacent to the rear side of the power supply panel 101 and does not collide with the processing machine, so that no thermal distortion is given to the processing machine. Also, the exhaust duct 26
The exhaust air inside is exhausted by the exhaust port 11 </ b> B to become exhaust 74 having a high flow velocity, and diffuses away from the oscillator 101. Therefore, it is possible to prevent the oscillator 110 from being thermally strained.

In the embodiment shown in FIG.
The warmed exhaust air from is bent around 90 ° around the transformer 61 and is sucked into the exhaust fan 50. The flow of the exhaust air is hindered by such an air path loss and a loss that causes the transformer 61 to become an air path resistance. In FIG. 7, since there is no air path loss, the wind speed in the fin air path 71 is high, and the heat dissipation is good. Therefore, the rise in temperature inside the panel can be further reduced, so that the thermal expansion of the housing 1 can be further reduced.

Embodiment 4 FIG. An embodiment of the invention according to claim 6 will be described with reference to FIG. In FIG. 8, a power supply panel 101 has an intake chamber 106 having two inverter units 104 and one intake chamber. Here, the number of the inverter units 104 is equal to the first to third embodiments.
The reason for the further decrease is that the output of the oscillator 110 is low. Further, the casing 1 has a top plate area corresponding to the oscillator 110 so that one space of the unit section is an empty space, but this empty space is configured as an intake chamber (inlet chamber) 106.

The front door 27 of the intake chamber 106 is provided with an intake port 27A for taking in outside air almost entirely.
A case 28 of the filter 29 is provided on the inner surface of the intake port 27A. The area of the intake opening 27A is configured to be larger than the total opening area of the intake openings of the inverter unit 104 in the first embodiment so that the speed of air passing through the filter 29 is reduced. The back plate 30 of the suction chamber 106 has an opening area substantially the same as that of the suction port 27A, and
Is provided with an intake port 30A in which the case 31 is disposed. The U-shaped wind tunnel 32 is an outside air introduction member that guides outside air taken in from the intake chamber 106 to the inverter unit 104.
It consists of a ceiling portion 32A and both side wall portions 32B, and is screwed to the support column 5. The front back edge of the wind tunnel 32 is the inlet 2
7A and 30A are in close contact with the outer periphery of the door 27 and the cover plate 30 to prevent air from escaping upward and to the side. The lower edge 32B1 of the both side walls 32B is located at the lower end of the heat sink 51, and an intake air passage 75 communicating with the inverter 104 is formed below the edge 32B1.

The inverter unit 104 is located below the lower edge of the rail 13 below the side plate 15 of the inverter unit 104, and has a square hole 15F at the bottom. It is formed to have a relatively large opening area in order to reduce air path resistance. Note that the door 9 has no intake port, and only an exhaust port 9B provided with an exhaust fan 50 is provided at the upper part. Also, back plate 1
No intake port is provided.

Next, the operation will be described. Exhaust fan 5
0, when the fan 56 is operated, the outside air is sucked in from the inlets 27A and 30A, and the arrows 71A to 71B and the arrows 72A from the intake air passage 75, the square hole 15F and the gap between the lower edge of the side plate 15 and the bottom plate 4. 72B, arrows 73A to 73B
Will be introduced. The convection velocity is reduced due to the large opening area, and the velocity of the air passing through the filter 29 is also reduced. Therefore, the pressure loss due to the filter 29 is reduced, and the cooling efficiency is improved. Further, since the intrusion of dust can be reduced, the number of times of cleaning the filter 29 can be reduced.

In the above description, the intake chamber 106 is provided between the inverter unit 104 and the auxiliary component unit 105. However, it may be disposed between the two inverter units 104, and in this case, the inverter unit 10
4 is evenly supplied with air. The temperature rise in the panel is made more uniform, and uneven dimensional fluctuation due to thermal expansion of the housing 1 can be reduced. The auxiliary part 105 houses an input circuit breaker and the like and has a low mounting density.
And can be used as an intake chamber. Therefore, the intake chamber 10
Since the air inlet on the back side of 6 can be omitted and the maintenance space on the back side is not required, the flexibility of the layout of the entire laser processing system is increased.

[0050]

According to the first aspect of the invention, the notch of the top plate and the bottom plate is fitted to the projection of the column and the side plate, so that the case can be made independent without using a jig, and This has the effect that the operator can easily weld and obtain a material with high rigidity.

In the case according to the second aspect, since the leveling bolts are provided on the bottom surface of the bottom plate, stress near the leveling bolts in the horizontal portion of the bottom plate is dispersed, and local deformation is prevented.

The power supply panel according to claim 3 is a unit case.
And the gap in the housing is closed by the closing member.
This prevents local airflow loss caused by the gap.
Cooling efficiency is improved and the temperature rise in the panel is kept low.
In addition, the rise in temperature inside the housing is suppressed,
The effect of reducing the expansion is obtained.

In the power supply panel according to the fourth aspect, since the closing member is configured using the guide rail and the unit case, an economical power supply panel can be obtained without preparing the closing member as a separate component.

In the power supply panel according to the fifth aspect, the air exhausted from the heat sink is discharged at a high speed obliquely upward from the exhaust port by the exhaust duct, so that the inside of the panel can be prevented from being locally heated to a high temperature. The effect that thermal distortion is not applied to the laser transmitter mounted on the device or the machine close to the back of the housing can be obtained.

According to the power supply panel using the housing according to the sixth aspect, by supplying outside air to the lower part of the unit from an intake chamber having an intake port, an effect of suppressing a temperature rise in the power supply panel can be obtained. Can be

[Brief description of the drawings]

FIG. 1 is a perspective view showing a power panel according to the present invention.

FIG. 2 is a perspective view of a main part showing a housing of a power panel.

FIG. 3 is a perspective view of a main part showing a disassembled state of a housing.

FIG. 4 is a vertical sectional view taken along the line IV-IV in FIG. 1;

5 is a sectional view taken along the line VV shown in FIG.

FIG. 6 is a perspective view of a main part of the unit case.

FIG. 7 is a longitudinal sectional view showing a unit.

FIG. 8 is a perspective view showing an intake chamber according to the present invention.

9 is a sectional view taken along the line XI-XI shown in FIG.

FIG. 10 is a sectional view taken along the line XX shown in FIG. 8;

[Explanation of symbols]

 2 Bottom plate 2C Bending leg 2D, 2E Notch 3 Top plate 4 Side plate 4D Projection 5 Support 5C Projection 6 Nut 7 Leveling bolt 9A, 11A Inlet 11 Back plate 13B Horizontal leg 14A Unit 14B Unit case 21A External bending leg 26 Exhaust duct 32 External air introduction member 104A, 104B, 104C Unit partition

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02B 1/30 H02B 1/56

Claims (6)

(57) [Claims] 1. A side plate provided on the left and right for supporting between a bottom plate and a top plate, a pair of front and back columns, and a door provided on a front surface,
In a housing having a back plate provided on the back, the bottom plate and the top plate have vertical legs at both front and rear edges of a horizontal portion,
A bent leg extending inward from the edge of the vertical leg, the cross section is formed in a lip groove shape, and the side plate has a pair of width legs each having a pair of widths provided at both end edges of the side surface. An inner bending leg extending inward from an edge of the width leg, and a cross-section is formed in a lip groove shape, and the support is formed in a groove shape in cross-section, and the bottom plate and the top plate have bending legs. Notches are provided corresponding to the disposition positions of the side plate and the support, and protrusions formed at upper and lower ends of the inner bending legs of the side plate and the support are formed by cutouts of the bottom plate and the top plate. A top end of the projection portion abutting against inner surfaces of the top plate and the bottom plate, and the abutting portion and the fitting portion are fixed by welding. 2. The lip groove formed on the side plate and the support column, the protrusion being fixed to the bottom plate and the horizontal portion of the top plate, and a nut for screwing a leveling bolt formed in the side plate. 2. The housing according to claim 1, wherein the housing is fixed to a bottom surface of a bottom plate located between the grooves and between the groove-shaped grooves formed in the support pillar. 3. A pair of front and rear supports for supporting between a bottom plate and a top plate.
And a door provided on the front, and a back plate provided on the back
A main circuit portion including a semiconductor module fixed to a heat receiving plate of the heat sink, the cooling fan being disposed on an end surface of the fin of the heat sink, and cooling the fin; and a front surface of the main circuit portion A unit including a substrate disposed in the unit, a unit case mounted in the housing for housing the unit, an exhaust fan mounted on an upper portion of the door, and a lower portion of the door under the heat sink. A power supply panel provided with a dustproof filter provided at an intake port provided below an end face, wherein the unit case is opened up and down, and left and right unit side plates and a lower end face of the heat sink. Equipped with a unit front plate and a unit back plate located on the upper side
A vertical air path is formed in the unit case.
The left and right unit side plates, the unit front plate, and the
Outside the side of the unit case consisting of the unit back plate
The gap between the circumference and the inner surface of the housing is
It is closed by a closing member provided on the lower end face, and prevents outside air from the intake port from being guided to the gap.
To stop and be guided to the air path in the unit case
A power panel characterized by the above . 4. The closing member includes a unit case.
Horizontal legs of the rail to be fixed, and the unit front plate and upper
The unit is bent horizontally from the lower end of the unit back plate.
4. The power board according to claim 3, wherein the power board comprises an outer bending leg . 5. An exhaust hole formed in an upper portion of the back plate, an inclined wall provided on an upper portion of the heat sink and extending from a heat receiving plate of the heat sink to an upper end of the exhaust port, 4. The power panel according to claim 3, further comprising an exhaust duct having left and right side walls extending from both sides to the rear plate, and having an air duct cross section gradually reduced toward the exhaust port. 6. A fin disposed on a fin end surface of the heat sink in a unit section which is a plurality of sections formed by the side plate and the support, and at least one first unit section of the unit section. A cooling fan, a main circuit portion including a semiconductor module fixed to the heat receiving plate of the heat sink, a unit accommodating the main circuit portion, and a unit having a vertical ventilation path formed therein, An exhaust fan attached to the upper part, an intake chamber formed to intake air from an intake port provided with a dust filter in the second unit section adjacent to the first unit section, And an outside air introduction member communicating with a lower portion of the first unit section and introducing outside air into an air passage of the unit. Power panel with the housing of the mounting.