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A generator motor connected to an output shaft of an engine mounted in a work machine includes a terminal box that houses a plurality of connectors for connecting an exterior electric-power-supplying cable to the generator motor. While the terminal box is provided to the generator motor, the plurali

A generator motor connected to an output shaft of an engine mounted in a work machine includes a terminal box that houses a plurality of connectors for connecting an exterior electric-power-supplying cable to the generator motor. While the terminal box is provided to the generator motor, the plurality of connectors are juxtaposed in a direction intersecting an orthogonal plane that is orthogonal to a rotation shaft of the generator motor.

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1. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising: a housing configured to be fixed to the engine of the work machine;a terminal box that houses a first socket configured to releasably connect a first exterior electric-power-supp

1. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising: a housing configured to be fixed to the engine of the work machine;a terminal box that houses a first socket configured to releasably connect a first exterior electric-power-supplying cable to the generator motor and a second socket configured to releasably connect a second exterior electric-power-supplying cable to the generator motor, wherein: the first socket has a plurality of first socket contacts that are electrically coupled to a stator coil of the generator motor and configured to be detachably connected to a corresponding plurality of contacts provided on the first exterior electric-power-supplying cable,the second socket has a plurality of second socket contacts that also are electrically coupled to the stator coil and configured to be detachably connected to a corresponding plurality of contacts provided on the second exterior electric-power-supplying cable, andwhen the terminal box is connected to the housing of the generator motor, the plurality of first socket contacts are arranged along a first line that is orthogonal to a longitudinal direction of a rotation shaft of the generator motor, and the plurality of second socket contacts are arranged along a second line that is parallel to the first line, the plurality of second socket contacts being spaced apart from the plurality of first socket contacts along the longitudinal direction of the rotation shaft. 2. The generator motor according to claim 1, wherein when the terminal box is connected to the generator motor, the first socket and the second socket are disposed facing downward. 3. The generator motor according to claim 1, wherein the first socket is fixed to a side surface of the terminal box, and the second socket is disposed opposite to the side surface with the first socket interposed therebetween and is fixed to the side surface through a support member, andthe support member comprises a contact end that is provided in a plane orthogonal to the direction along which the first socket and the second socket are juxtaposed and is brought into contact with an inner surface of the terminal box. 4. The generator motor according to claim 3, wherein the second socket comprises a contact terminal that is provided near the second exterior electric-power-supplying cable and detects a connecting condition to the second exterior electric-power-supplying cable, andthe contact end of the support member is brought into contact with the inner surface of the terminal box in a direction in which the second exterior electric-power-supplying cable is attached and detached. 5. The generator motor according to claim 1, wherein an inside of the generator motor is cooled by a cooling medium, andthe terminal box is attached to the generator motor at a position higher than the rotation shaft of the generator motor. 6. The generator motor according to claim 5, wherein the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor. 7. The generator motor according to claim 1, further comprising: a hydraulic pump that drives working equipment of the work machine. 8. A work machine comprising: a working equipment;a counterweight that is filled with weights for weight balance against the working equipment; andthe generator motor according to claim 1, whereinthe generator motor is provided near the counterweight, andthe terminal box is provided to a side surface of the generator motor facing the counterweight. 9. The generator motor according to claim 5, wherein the cooling medium comprises a cooling oil. 10. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising: a housing configured to be fixed to the engine of the work machine;a terminal box that houses a first connecting means configured to releasably connect a first exterior electric-power-supplying cable to the generator motor and a second connecting means configured to releasably connect a second exterior electric-power-supplying cable to the generator motor, wherein: the first connecting means has a plurality of first contacts that are electrically coupled to a stator coil of the generator motor and configured to be detachably connected to a corresponding plurality of contacts provided on the first exterior electric-power-supplying cable,the second connecting means has a plurality of second contacts that also are electrically coupled to the stator coil and configured to be detachably connected to a corresponding plurality of contacts provided on the second exterior electric-power-supplying cable, andwhen the terminal box is connected to the housing of the generator motor, the plurality of first contacts are arranged along a first line that is orthogonal to a longitudinal direction of a rotation shaft of the generator motor, and the plurality of second contacts are arranged along a second line that is parallel to the first line, the plurality of second contacts being spaced apart from the plurality of first contacts along the longitudinal direction of the rotation shaft. 11. The generator motor according to claim 10, wherein the first connecting means comprises a first socket that is configured to receive the first exterior electric-power-supplying cable. 12. The generator motor according to claim 11, wherein the second connecting means comprises a second socket that is configured to receive the second exterior electric-power-supplying cable. 13. The generator motor according to claim 12, wherein when the terminal box is connected to the generator motor, the first socket and the second socket are disposed facing downward. 14. The generator motor according to claim 12, wherein the first socket is fixed to a side surface of the terminal box, and the second socket is disposed opposite to the side surface with the first socket interposed therebetween and is fixed to the side surface through a support member, andthe support member comprises a contact end that is provided in a plane orthogonal to the direction along which the first socket and the second socket are juxtaposed and is brought into contact with an inner surface of the terminal box. 15. The generator motor according to claim 14, wherein the second socket comprises a contact terminal that is provided near the second exterior electric-power-supplying cable and detects a connecting condition to the second exterior electric-power-supplying cable, andthe contact end of the support member is brought into contact with the inner surface of the terminal box in a direction in which the second exterior electric-power-supplying cable is attached and detached. 16. The generator motor according to claim 10, wherein an inside of the generator motor is cooled by a cooling medium, andthe terminal box is attached to the generator motor at a position higher than the rotation shaft of the generator motor. 17. The generator motor according to claim 16, wherein the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor. 18. The generator motor according to claim 10, further comprising: a hydraulic pump that drives working equipment of the work machine. 19. A work machine comprising: a working equipment;a counterweight that is filled with weights for weight balance against the working equipment; andthe generator motor according to claim 10, whereinthe generator motor is provided near the counterweight, andthe terminal box is provided to a side surface of the generator motor facing the counterweight. 20. The generator motor according to claim 16, wherein the cooling medium comprises a cooling oil.