WO2023026487A1

WO2023026487A1 - Laser oscillator powered through power cable

Info

Publication number: WO2023026487A1
Application number: PCT/JP2021/031591
Authority: WO
Inventors: 康之田中
Original assignee: ファナック株式会社
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-03-02

Abstract

A laser oscillator according to the present invention includes an introduction member that supports a conductor passing through a housing, and a master breaker that can shut off the supply of power from the conductor. In the master breaker, a power cable through which electric power is input is connected to a lower terminal, and a power cable through which electric power is output is connected to an upper terminal. The introduction member is fixed to a front panel of the housing. The conductor is disposed so as to penetrate through the housing from the lower side to the upper side in a direction toward the inside of the housing.

Description

A laser oscillator powered by a power cable

The present invention relates to a laser oscillator that is powered by a power cable.

In the prior art, power supplies for driving machines, switchboards for distributing power, switchgear, etc. are known as devices that require large amounts of power. A large amount of electric power is supplied by a large-diameter cable called a power cable (for example, JP-A-4-43305 and JP-A-2019-47579). Also, as a device that requires a large amount of electric power, a laser processing device that processes a workpiece with a laser beam is known (for example, Japanese Patent Application Laid-Open No. 2015-122450).

When supplying power to the electrical components inside the housing with a power cable, it is necessary to arrange the power cable so that it penetrates the housing. For example, a member that supports the cable can be used to support the cable so that it penetrates the housing (eg, International Publication No. 2015/182006).

A breaker is placed in the electrical device to cut off the power introduced from the power supply. For example, a power cable is connected to a main breaker to prevent excessive current flow in the event of a short circuit or the like. In the prior art, there is known a device in which a main breaker is arranged on the outer surface of a housing and a power cable is connected to the main breaker (for example, Japanese Unexamined Patent Publication No. 9-70662).

JP-A-4-43305 JP 2019-47579 A WO2015/182006 JP 2015-122450 A JP-A-9-70662

　There are laser oscillators that emit laser light, ranging from low output to high output. In recent years, the output of laser oscillators has been increasing for processing workpieces. For example, a high-power laser oscillator is used to oscillate a laser beam used for processing work such as welding.

In recent years, the output of laser oscillators has increased. For this reason, the wire diameter of the power cable for supplying power to the laser oscillator is increased and the weight is increased. A power cable connected to an external power supply is connected to the main breaker of the laser oscillator. In a general main breaker, upper terminals are terminals connected to a power supply, and lower terminals are terminals connected to a load.

The worker must connect the power cable connected to the external power supply to the upper terminal of the main breaker. However, in order to connect the power cable to the main breaker, it is necessary to lift the heavy power cable and connect the power cable to the upper terminal of the main breaker. For example, one worker holds the power cable while another worker connects the power cable to the terminal of the main breaker. For this reason, there is a problem of poor workability.

Also, if the main breaker is placed at the top of the housing, the power cable must be lifted to the top of the housing. When pulling the power cable from the bottom of the housing of the laser oscillator to the inside of the housing, the heavy cable housing must be lifted to the top. Another problem is that a fixing member is required to fix the power cable to the housing. Alternatively, the power cable must be supported by the top plate or the side plate of the housing, and there is a problem that the top plate or the side plate needs to be reinforced.

A laser oscillator according to one aspect of the present disclosure includes a housing in which an electrical component is arranged, and an introduction member that supports a conductor penetrating the housing and introduces the conductor into the housing. The laser oscillator includes an electric cutoff member arranged above the introduction member inside the housing and capable of cutting off the supply of electric power from the conductor. The laser oscillator includes a branch circuit that supplies electric power output from the electrical cutoff member to a plurality of electrical components. The electrical interrupting member is a main breaker or fuse. The electric blocking member has a lower terminal connected to a power cable to which power is input, and an upper terminal connected to a power cable to which power is output. The introduction member is fixed to a plate member that extends in the vertical direction and constitutes the outer surface of the housing. The conductor is arranged to pass through the housing from the bottom to the top in the direction toward the inside of the housing.

According to the aspect of the present disclosure, it is possible to provide a laser oscillator that improves the workability of connecting the power cable to the main breaker or fuse.

1 is a perspective view of a first laser oscillator in an embodiment; FIG. 1 is a block diagram of a laser oscillator in an embodiment; FIG. It is an enlarged front view of the portion of the main breaker and introduction member in the embodiment. FIG. 2 is a perspective view of a laser oscillator for explaining electrical components inside a housing; FIG. 11 is another perspective view of the laser oscillator for explaining electrical components inside the housing; FIG. 4B is a first schematic diagram illustrating the angle of the portion where the power cable penetrates the housing; FIG. 4 is a schematic diagram of the laser oscillator of the comparative example when the front plate is removed; FIG. 4B is a second schematic diagram illustrating the angle of the portion where the power cable penetrates the housing; FIG. 11 is a third schematic diagram illustrating the angle of the portion where the power cable penetrates the housing; It is a schematic diagram of a second laser oscillator in the embodiment. It is a schematic diagram of a third laser oscillator in the embodiment.

A laser oscillator according to an embodiment will be described with reference to FIGS. 1 to 11. FIG. The laser oscillator of this embodiment oscillates laser light for processing a workpiece. For example, a laser oscillator is arranged in a processing device for performing work welding or cutting work. In this embodiment, a fiber laser oscillator will be described as an example. The laser oscillator is not limited to this form, and an oscillator that oscillates laser light by any method can be adopted.

FIG. 1 shows a perspective view of the first laser oscillator in this embodiment. The first laser oscillator 1 comprises a housing 11 in which electrical components are arranged. The housing 11 of this embodiment is formed in a box shape. The housing 11 includes side plates 11a, a front plate 11b, a rear plate, a top plate 11c, and a bottom plate fixed to a frame. Each of the side plate 11a, the front plate 11b, the rear plate, the top plate 11c, and the bottom plate is a plurality of plate members forming the outer surface of the housing 11. As shown in FIG. The side plate 11a, the front plate 11b, and the rear plate extend vertically.

An operation panel 12 on which switches and the like for operating the laser oscillator 1 are arranged is fixed to the front plate 11b. A plurality of insertion openings 13 for connecting signal lines are arranged on the front plate 11b.

Electric power from an external power supply is supplied to electrical components inside the housing 11 by

power cables

17a, 17b, and 17c as conductors. An introduction member 15 for introducing

power cables

17a, 17b, and 17c from the outside of the housing 11 into the interior of the housing 11 is fixed to the front plate 11b. The introduction member 15 supports

power cables

17 a , 17 b , 17 c so as to pass through the housing 11 . The introduction member 15 of the present embodiment is arranged below the front plate 11b.

An introduction member 38 for introducing the ground cable 39 into the housing 11 is fixed to the front plate 11b. The ground cable 39 is arranged so as to pass through the front plate 11b. The ground cable 39 is connected to the frame 11 g of the housing 11 . The laser oscillator 1 also includes a main breaker 21 as an electrical cutoff member for preventing overcurrent from flowing when a lightning strike, short circuit, or the like occurs. The main breaker 21 is formed so as to be able to cut off the power supply. A knob portion 21a of the main breaker 21 protrudes from the front plate 11b.

FIG. 2 shows a block diagram for explaining the electric circuit of the laser oscillator in this embodiment. Electric power is supplied to the laser oscillator 1 from an external power supply 32 through

power cables

17a, 17b, and 17c.

In this example, the laser oscillator 1 includes a first oscillator circuit 2 and a second oscillator circuit 3 as circuits for oscillating laser light. The first oscillator circuit 2 includes a branch terminal block 22 connected to a main breaker 21 and a branch breaker 23 connected to a circuit branched from the branch terminal block 22 . The branch terminal block 22 and an electric circuit from the branch terminal block 22 to the branch breaker 23 constitute a branch circuit 34 for supplying power output from the main breaker 21 to a plurality of electric components. Each branch breaker 23 is connected to an LD (laser diode) power supply 25 via two electromagnetic contactors 24 . The LD power supply 25 is composed of a coil, a capacitor, a switching element, and the like.

A fiber laser oscillator includes an optical fiber as a medium for amplifying light. The first oscillator circuit 2 includes multiple LC (laser cavity) units 26 . The first oscillator circuit 2 includes six LC units 26 . An LC unit 26 is connected to each LD power supply 25 . The LC unit 26 amplifies the laser light according to the power supplied from the LD power supply 25 . A plurality of laser beams amplified by the LC unit 26 are combined by a beam combiner and then supplied to an apparatus for processing a workpiece via an optical fiber cable or the like.

The second oscillator circuit 3 in the present embodiment has the same configuration as the first oscillator circuit 2. The second oscillator circuit 3 includes a branch terminal, a branch breaker, an electromagnetic contactor, an LD power supply, and an LC unit. A branch terminal block of the second oscillator circuit 3 is connected to a DC power supply 29 via a breaker 28 . A DC power supply 29 supplies power to a control board 30 that functions as a controller for the laser oscillator 1 . A safety circuit board 49 is connected to the branch terminal block of the second oscillator circuit 3 via

breakers

28 and 46 , a transformer 47 and a breaker 48 .

Each LD power supply 25 and LC unit 26 is controlled by the control board 30 . An external signal is input to the control board 30 via the signal input section 33 . For example, a laser beam output command is input according to the machining of the workpiece. The signal input unit 33 is configured by, for example, the insertion port 13 arranged on the front plate 11b of the housing 11 .

FIG. 3 shows an enlarged view of the front plate of the housing showing the introduction member and the main breaker in this embodiment. FIG. 4 shows a perspective view of a laser oscillator for explaining the arrangement of electrical components inside the housing according to the present embodiment. 3 and 4, the introduction member 15 supports three-phase

AC power cables

17a, 17b, 17c. The introduction member 15 includes a support member 15a fixed to the front plate 11b and a holding member 15b holding

power cables

17a, 17b and 17c. The support member 15a supports the holding member 15b. The

power cables

17a, 17b, 17c are supported by the support member 15a via the holding member 15b.

The holding member 15b is also called a cable gland. The holding member 15b includes a screw and rubber packing. The holding member 15b is formed so that the packing is brought into close contact with the outer peripheral surfaces of the

power cables

17a, 17b, and 17c by tightening the screws. The holding member 15 b has a function of sealing the inside of the housing 11 .

The

power cables

17a, 17b, and 17c are inserted in the direction toward the inside of the housing 11. The

power cables

17a, 17b, and 17c are arranged so as to pass through the housing 11 from the bottom to the top in the inward direction. The support member 15a supports the holding member 15b so that the

power cables

17a, 17b, 17c are tilted with respect to the horizontal direction.

A shielding plate 35, which will be described later, is fixed to the frame 11g of the housing 11. The master breaker 21 is fixed to the shield plate 35 .

Power cables

17 a , 17 b , 17 c passing through the front plate 11 b are connected to the main breaker 21 . A power section 5 in which a main breaker 21 and

power cables

17a, 17b, 17c, 18a, 18b, and 18c are arranged is configured in the front portion inside the housing 11 . A region surrounded by the shielding plate 35 and the front plate 11b corresponds to the power section 5. As shown in FIG.

The main breaker 21 is arranged above the introduction member 15 inside the housing 11 . The main breaker 21 is arranged near the introduction member 15 . Power is supplied to the master breaker 21 from

power cables

17a, 17b, and 17c.

The master breaker 21 has a terminal connected to the power supply and a terminal connected to a load such as an electric component. In a general breaker, when the breaker is attached to a given device, the terminals connected to the power supply are arranged on the upper side. Also, the terminals connected to the load are arranged on the lower side. Here, in the present embodiment, the

power cables

17a, 17b, 17c that supply power from the power supply are connected to terminals of the load arranged on the lower side.

Power cables

18a, 18b, and 18c through which electric power is output to supply electric power to electric components are connected to terminals of the power supply arranged on the upper side. That is, the power cable is connected to the main breaker 21 so that the connection of the load and the connection of the power supply are reversed.

The master breaker 21 of the present embodiment is selected to operate normally even if the power cable is connected in reverse. The main breaker 21 has a terminal to which electric power is input arranged on the lower side, and a terminal to which electric power is outputted is arranged on the upper side. A power cable for supplying power from the power source is connected to the lower terminal, and a branch circuit power cable for supplying power to the electrical component is connected to the upper terminal.

Referring to FIGS. 2 and 4, in the present embodiment, the space inside housing 11 is separated by boundary plate 11e. A plurality of LD power sources 25, a plurality of LC units 26, and a beam combiner 31 are arranged in one region inside the housing 11 so as to be stacked. In this example, the LD power supply 25 is arranged at the bottom of the housing 11 and the LC unit 26 is arranged above the LD power supply 25 . The beam combiner 31 is arranged above the LC unit 26 .

Fig. 5 shows a perspective view of the laser oscillator when the side plate of the housing is removed. FIG. 5 shows electrical components arranged in the other area when the area inside the housing 11 is separated by the boundary plate 11e. Referring to FIGS. 2 to 5, the other region separated by boundary plate 11e includes laser control unit 6, which is a portion where control substrate 30 for controlling oscillation of laser light is arranged. A safety circuit board 49 is arranged in addition to the control board 30 in the laser control unit 6 of the present embodiment.

Also, in the other area, a power supply section 7 in which electrical components for supplying power to the LD power supply 25 are arranged is configured. The laser control section 6 and the power supply section 7 are separated by a boundary plate 11f. A branch terminal block 22 , a branch breaker 23 , and an electromagnetic contactor 24 are arranged in the power supply section 7 . A cooling fan 41 for cooling the laser control unit 6 and the LD power supply 25 is fixed to the frame 11g of the housing 11 .

With reference to FIGS. 3 and 5,

power cables

18a, 18b, and 18c to which power is supplied from main breaker 21 are arranged to extend downward. Then, it extends to the power supply unit 7 through the lower side of the laser control unit 6 . The

power cables

18 a , 18 b , 18 c are connected to the branch terminal block 22 . The branch terminal block 22 is connected to each branch breaker 23 by a power cable 19 . The branch breaker 23 is connected to each electromagnetic contactor 24 by a power cable 20a. One electromagnetic contactor 24 is connected to another electromagnetic contactor 24 via a power cable 20b. Electric power is supplied from the other electromagnetic contactor 24 to the LD power supply 25 arranged on the back side of the boundary plate 11e through the power cable 20c.

Fig. 6 shows a first schematic cross-sectional view for explaining the part where the power cable penetrates the housing. Of the

power cables

17a, 17b, and 17c, the power cable 17a is shown here, but the

other power cables

17b and 17c also pass through the front plate 11b of the housing 11 at similar angles. The power cable 17a is arranged to pass through the housing 11 from the bottom to the top in the direction toward the inside of the housing 11 . The power cable 17a passes through the front plate 11b in a direction inclined with respect to the horizontal direction.

In this example, the power cable 17a is supported by the introduction member 15 so as to pass through the front plate 11b at an angle θ1 with respect to the horizontal direction. A power cable 17 a to which electric power is input is connected to a lower terminal of the main breaker 21 .

The main breaker 21 is fixed to the housing 11 before connecting the power cable 17a. Next, the power cable 17 a is arranged so as to pass through the introduction member 15 . The power cable 17 a is connected to the lower terminal of the main breaker 21 . The holding member 15b of the introduction member 15 fixes the power cable 17a. The operator can insert the power cable 17 a from below and connect the power cable 17 a to the lower terminal of the main breaker 21 . Therefore, the operator can easily perform the work of connecting the power cable 17a to the main breaker 21 .

FIG. 7 shows a schematic diagram of a laser oscillator of a comparative example. A main breaker 52 is arranged inside a housing 51 of the laser oscillator 50 of the comparative example. The main breaker 52 is fixed to the top of the housing 51 . Among the terminals of the main breaker 52, the terminal connected to the power supply is arranged on the upper side.

Power cables

54 a , 54 b , 54 c connected to the power supply pass through the housing 51 with a holding member 53 fixed to the bottom plate of the housing 51 .

In the laser oscillator 50 of the comparative example, when connecting the

power cables

54a, 54b, 54c to the main breaker 52, the

power cables

54a, 54b, 54c are inserted through the holding member 53. After this, it is necessary to lift the

power cables

54 a , 54 b , 54 c to the main breaker 52 arranged on the top of the housing 51 . The

power cables

54a, 54b, 54c require a great deal of labor due to their heavy weight.

Furthermore, the terminal connected to the power supply of the main breaker 52 is arranged on the upper side. For this reason, it is necessary to change the orientation of the tip portions of the

power cables

54 a , 54 b , 54 c and connect them to the upper terminal of the main breaker 52 . That is, workability is poor because the

power cables

54a, 54b, and 54c must be connected in such a manner that the ends thereof face downward.

Also, since the holding member 53 is arranged on the bottom plate, there is a problem that the workability when inserting the holding member 53 is poor. In addition, a space is required below the laser oscillator 50 for arranging the

power cables

54a, 54b, and 54c. Further, the

power cables

54a, 54b, 54c are arranged inside the housing 51 at long distances. For this reason, it is necessary to arrange fixing members for fixing the

power cables

54a, 54b, 54c to the housing 51, or to reinforce the side plates.

3 to 6, laser oscillator 1 according to the present embodiment has introduction member 15 fixed to the outer surface of housing 11 extending in the vertical direction. The

power cables

17a, 17b, 17c connected to the power supply are supported so as to extend from the bottom to the top in the direction toward the inside of the housing 11. As shown in FIG. The

power cables

17 a , 17 b , 17 c are connected to lower terminals of the main breaker 21 . For this reason, the operator does not have to lift to a high position to connect the

power cables

17a, 17b, 17c. Also, the operator does not need to change the direction of the tip portions of the

power cables

17a, 17b, 17c. For this reason, the operator can easily connect the

power cables

17a, 17b, 17c to the main breaker 21 or remove them from the main breaker 21. FIG. Alternatively, it is possible to reduce labor when laying the

power cables

17a, 17b, 17c. For example, there is no need to lay power cables on the underside of the housing, which improves workability when laying power cables.

Further, by arranging the main breaker 21 near the introduction member 15, it is not necessary to arrange the

power cables

17a, 17b, 17c over a long distance inside the housing 51, and the

power cables

17a, 17b, 17c can be It does not have to be fixed to the housing 11 by a fixing member. Thus, the laser oscillator of this embodiment can improve workability and simplify the configuration of the laser oscillator.

The structure of this embodiment is suitable for a laser oscillator having a thick power cable. For example, it is suitable for a laser oscillator provided with a power cable having a cross-sectional area of 100 mm ² or more. Moreover, the structure of this embodiment is suitable for a high-power laser oscillator. As a high-power laser oscillator, for example, a laser oscillator having an output of 20 kW or more can be exemplified.

Referring to FIG. 6, the angle θ1 with respect to the horizontal direction when the power cable 17a passes through the front plate 11b is preferably larger than 20° and smaller than 70° in consideration of workability. However, the power cable can pass through the housing at any angle to the horizontal. More specifically, any angle larger than 0° and smaller than 90° can be adopted as the angle with respect to the horizontal direction when the power cable passes through the plate member extending in the vertical direction of the housing.

Fig. 8 shows a second schematic cross-sectional view for explaining the part where the power cable penetrates the housing. FIG. 9 shows a third schematic cross-sectional view for explaining a portion where the power cable penetrates the housing. In the example shown in FIG. 8, the introduction member 15 is formed so that the angle θ2 with respect to the horizontal direction when the power cable 17a passes through the front plate 11b is small. Further, in the example shown in FIG. 9, the angle θ3 with respect to the horizontal direction when the power cable 17a passes through the front plate 11b is an angle close to 90°. The power cable is preferably supported so as to pass through the housing at an angle that improves workability according to the position inside the housing where the main breaker is arranged.

Next, in the laser oscillator 50 of the comparative example shown in FIG. 7,

power cables

54a, 54b, and 54c are arranged over a long distance inside the housing 51. As a result, there is a possibility that noise will enter the signal lines arranged near the

power cables

54a, 54b, 54c. In particular, when a power cable of 100V or more and a signal line of 24V or less are close to each other, noise from the power cable may be carried on the signal line.

3 to 5, laser oscillator 1 of the present embodiment includes shielding for suppressing noise generation by

power cables

17a, 17b, 17c, 18a, 18b, and 18c connected to main breaker 21. A plate 35 is provided. The shielding plate 35 includes the main breaker 21 and the power section 5 in which the

power cables

17a, 17b, 17c, 18a, 18b, and 18c connected to the main breaker 21 are arranged, a signal line 36 for controlling laser oscillation, and It is formed so as to be isolated from the laser control section 6 in which the control board 30 is arranged. As the shielding plate 35, any member for suppressing noise propagation, such as a galvanized steel plate or a nickel-plated steel plate, can be adopted.

With reference to FIG. 5, a signal according to the operator's operation is transmitted from the operation panel 12 to the control board 30 through the signal line 36 . The shielding plate 35 is arranged so as to separate the area where the

power cables

17a, 17b, 17c, 18a, 18b, 18c are arranged from the area where the signal line 36 and the control board 30 are arranged. By adopting this configuration, noise from

power cables

17 a , 17 b , 17 c , 18 a , 18 b , 18 c can be suppressed from getting on signal line 36 and control board 30 . Moreover, in this embodiment, it is possible to suppress noise from riding on the safety circuit board 49 .

1, 3, and 4, front plate 11b in the present embodiment is fixed to frame 11g of housing 11 with bolts 14 as fastening members. The front plate 11b is the plate member closest to the main breaker 21 among the plurality of plate members. The front plate 11b is formed so as to be detachable from the frame 11g of the housing 11 by removing the bolts 14. As shown in FIG. The front plate 11b includes a cover member 11ba that can be removed from surrounding plate members. The cover member 11ba is formed in a plate shape so as to surround the area where the main breaker 21 is arranged. The covering member 11ba is formed so as to cover the terminals of the master breaker 21 . The cover member 11ba is fixed to surrounding plate members by fastening members such as screws (not shown). By removing the cover member 11ba, the terminals of the master breaker 21 to which the

power cables

18a, 18b, 18c, 17a, 17b, 17c are connected are exposed. An operator can easily connect or disconnect the

power cables

18a, 18b, 18c, 17a, 17b, and 17c to/from the main breaker 21 by removing the covering member 11ba.

In the above embodiment, a breaker is exemplified as an electrical interrupting member for interrupting an excessive current when a short circuit or the like occurs, but it is not limited to this form. A fuse may be arranged as the electrical interrupting member instead of the breaker. The fuse can also be fixed to the housing or the like so that the input terminal connected to the power supply is arranged on the lower side and the output terminal connected to the load is arranged on the upper side.

FIG. 10 shows a schematic diagram of the second laser oscillator in this embodiment. In the above-described embodiment, the

power cables

17a, 17b, 17c passing through the introduction member 15 are directly connected to the main breaker 21, but this is not the only option. In the second laser oscillator 8, the power cable 17a is connected to the main breaker 21 via the terminal block 42. As shown in FIG. The

other power cables

17b and 17c are also connected to the main breaker 21 via the terminal block 42. FIG.

The terminal block 42 is fixed to the frame of the housing 11 or the shielding plate inside the housing 11 . A power cable 17a is connected to each of the

terminals

42a and 42b with bolts or the like. A power cable 17a connected to a power supply is connected to a terminal 42a on the lower side of the terminal block 42. As shown in FIG. The power cable 17a connected to the lower terminal of the main breaker 21 is connected to the upper terminal 42b of the terminal block 42 . Other configurations, actions, and effects are the same as those of the first laser oscillator described above.

FIG. 11 shows a schematic diagram of the third laser oscillator in this embodiment. In the above-described embodiment, the

power cables

17a, 17b, and 17c are the conductors that pass through the housing 11, but are not limited to this. In the third laser oscillator 9 , a terminal block 43 is fixed to the front plate 11 b of the housing 11 . A lead-in member for introducing the conductor into the housing 11 is composed of a terminal block 43 fixed to the housing 11 .

The space between the terminal block 43 and the front plate 11b is sealed. The terminal block 43 has an electric circuit 43c as a conductor arranged inside, and a conductor support member 43d that supports the electric circuit 43c. 43 d of conductor support members are comprised by the housing|casing of the terminal block 43, for example.

The terminal block 43 has an input-side terminal 43a and an output-side terminal 43b. The conductor support member 43d supports the

terminals

43a and 43b. The input-side terminal 43 a is arranged outside the housing 11 . The terminal 43 b on the output side is arranged inside the housing 11 . A power cable 17a is connected to each of the

terminals

43a and 43b.

The electric circuit 43c electrically connects the terminal 43a on the input side and the terminal 43b on the output side. In this way, the conductor that conducts electricity passing through the housing 11 is configured by the electric circuit 43c. The terminal 43b on the output side is arranged at a position higher than the terminal 43a on the input side.

In the third laser oscillator 9, an electric circuit 43c as a conductor is arranged so as to pass through the housing 11 from the bottom to the top in the direction toward the inside of the housing 11. Also in the third laser oscillator 9, there is no need to lift the power cable 17a to a high position or change the direction of the tip of the power cable 17a. For this reason, workability is improved when connecting the power cable to the main breaker.

The conductor placed inside the terminal block is not limited to an electric circuit, and any member that conducts electricity can be adopted. For example, the terminals on the input side and the terminals on the output side may be connected by a conductor. Other configurations, actions, and effects are the same as those of the above-described first laser oscillator and second laser oscillator, and thus description thereof will not be repeated here.

The above embodiments can be combined as appropriate. In each of the above figures, the same reference numerals are given to the same or equivalent parts. It should be noted that the above embodiment is an example and does not limit the invention. Further, the embodiments include modifications of the embodiments indicated in the claims.

Reference Signs List

1, 8, 9 laser oscillator 5 power unit 6 laser control unit 11 housing 11b front plate 11ba cover member 11g frame 14 bolt 15 introduction member

15a support member

15b holding member

17a, 17b,

17c power cable

18a, 18b, 18c power Cable 21 Main breaker 21a Knob 22 Branch terminal block 23 Branch breaker 30 Control board 32 External power supply 34 Branch circuit 35 Shielding plate 36 Signal line 43

Terminal block

43a, 43b Terminal 43c Electric circuit 43d Conductor support member

Claims

a housing in which electrical components are arranged;
an introduction member that supports a conductor passing through the housing and introduces the conductor into the housing;
an electrical interrupting member disposed above the introduction member inside the housing and capable of interrupting power supply from the conductor;
a branch circuit that supplies electric power output from the electrical interrupting member to the plurality of electrical components,
The electrical interrupting member is a main breaker or a fuse,
The electrical blocking member has a lower terminal connected to a power cable for inputting electric power, and an upper terminal connected to a power cable for outputting power,
The introduction member is fixed to a plate member that extends in a vertical direction and constitutes the outer surface of the housing,
The laser oscillator, wherein the conductor is arranged to pass through the housing from bottom to top in a direction toward the inside of the housing.
Equipped with a shielding plate that suppresses noise from a power cable connected to the electrical blocking member,
The shielding plate is formed so as to separate a region in which a power cable connected to the electrical blocking member is arranged and a region in which a signal line and a control board for controlling the oscillation of the laser light are arranged. 2. The laser oscillator of claim 1, wherein a
The introduction member is a terminal block fixed to the housing,
The terminal block includes a conductor support member that supports the conductor,
The conductor is arranged inside the conductor support member,
the terminal on the input side of the terminal block is arranged outside the housing,
3. An output-side terminal of said terminal block is arranged at a position higher than an input-side terminal inside said housing, and is connected to said electrical interrupting member by a power cable. The laser oscillator according to .
The conductor is a power cable connected to a power source,
3. The laser oscillator according to claim 1, wherein said introduction member includes a support member that supports a power cable.
comprising a plurality of the plate members,
the plate member disposed closest to the electrical interrupting member includes a detachable cover member formed to cover the terminals of the electrical interrupting member;
5. The laser oscillator according to any one of claims 1 to 4, wherein a terminal of said electrical cut-off member is exposed by removing said cover member.