Cable drilling apparatus and cable hole forming method

Abstract

The object of the present invention is to solve the problems of the prior art, namely, to provide a cable drilling device that can reach the cable conductor without harming the worker even if a power cable in a charged state is mistakenly selected, and a cable hole forming method that uses this device to form small holes in a cable. [Solution] The cable drilling device of the present invention is a device that drills holes in a cable using a drill bit that moves from rear to front, and comprises a drive means, a rotating drum, a drill bit, and an external case. When the operating means is operated, the rotating shaft of the drive means and the rotating drum rotate, and the outer screw engraved on the outer surface of the rotating drum engages with the inner screw engraved on the inner surface of the external case, causing the rotating drum and drill bit to rotate and move forward.

Claims

1. A device for drilling holes in cables using a drill bit that moves from rear to front, A drive means for rotating a rotating shaft located at the front, A rotating drum attached to the aforementioned rotating shaft, The drill bit is provided in front of the rotating drum, An external case that is fitted onto the aforementioned rotating drum, The system includes an operating means for operating the drive means via wireless or wired communication, The outer surface of the rotating drum has external threads engraved on it, and the inner surface of the external case has internal threads engraved on it. When the rotating shaft rotates by operating the aforementioned operating means, the rotating drum and the drill bit rotate. As the rotating drum rotates, the rotating drum and the drill bit advance due to the outer screw that engages with the inner screw. With the tip of the drill bit in contact with the cable, the drill bit can be rotated and advanced to drill a hole in the cable. A cable drilling device characterized by the following features.

2. A drive means holder that houses the aforementioned drive means, The external case further comprises a guide projection provided on the external case, The drive means holder has a guide groove formed in it, extending from rear to front. As the guide projection fits into the guide groove, the drive means holder and the drive means advance along the guide groove while their rotation is suppressed. The cable drilling apparatus according to feature 1.

3. Control means for controlling the operation of the drive means, A rear switch attached to the drive means holder, The external case further comprises a projection for a rear switch provided on the external case, The control means controls the drive means to rotate the rotating shaft so that the rotating drum retracts when the rotating drum and the drill bit have been rotating forward and stopped for a predetermined time. Furthermore, the control means stops the operation of the drive means when the rear switch comes into contact with the projection for the rear switch. The cable drilling apparatus according to feature 2.

4. Control means for controlling the operation of the drive means, The system further comprises current measuring means for measuring the current related to the drive means during operation, The control means stops the operation of the drive means when the current measured by the current measuring means rises to a level that satisfies predetermined conditions. The cable drilling apparatus according to feature 1.

5. The cable mounting means further comprises a strip-shaped or string-shaped winding material, With the external case supported by the winding material wrapped around the cable, the drill bit drills a hole in the cable. The cable drilling apparatus according to feature 1.

6. The cable mounting means includes a support jig that is attached to the winding material, The tip of the aforementioned external case is provided with a fitting projection, The support jig has a fitting hole and a through hole having a smaller diameter than the fitting hole. By inserting the fitting projection into the fitting hole, the external case and the support jig are detachably connected. With the external case and the support jig connected, the drill bit inserted through the insertion hole drills a hole in the cable. The cable drilling apparatus according to feature 5.

7. A method for forming a cable hole in a cable using a cable drilling device, The cable drilling device comprises a drive means with a rotating shaft at the front, a rotating drum attached to the rotating shaft, a drill bit provided in front of the rotating drum, an external case fitted onto the rotating drum, an operating means, and a cable mounting means. The outer surface of the rotating drum has external threads engraved on it, and the inner surface of the external case has internal threads engraved on it. The device installation step involves wrapping a strip-shaped or string-shaped winding material included in the cable mounting means around the cable, and connecting the drill bit to a support jig attached to the winding material. An operating step in which an operator operates the operating means, The drilling process includes: when an operation signal from the operating means is sent to the driving means via wireless or wired communication as a result of the operation step, the driving means rotates the rotating shaft, further rotating the rotating drum and the drill bit, and the rotating drum and the drill bit advance due to the outer screw that engages with the inner screw, thereby drilling a hole in the cable; In the drilling process, the cable hole is formed by drilling until the cable conductor is reached. A method for forming cable holes, characterized by the features described above.

8. In the device installation step, the drill bit having a predetermined reference diameter is connected, The cable conductor can be visually inspected through the cable hole formed by the drilling process. The method for forming a cable hole according to claim 7, characterized by its features.

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