Accidental cut-off prevention device

Abstract

The present invention provides a device to prevent accidental cutting, which ensures the clarity of the cable to be cut and prevents other cables from mistakenly entering the cutting area. [Solution] The device comprises an electric cutter 20 for cutting communication and power cables, a protective frame 30 that prevents cables other than the cable to be cut from interfering with the movable range of the cutting blade 22 of the electric cutter 20, and a mounting joint 40 for attaching the protective frame 30 to the electric cutter 20. The protective frame 30 has a conductor 34 arranged along the frame shape, and power is supplied to the electric cutter 20 by connecting the protective frame 30 to the mounting joint 40.

Description

Technical Field

[0001] The present invention relates to an accidental cutting prevention device, and particularly to an accidental cutting prevention device suitable for preventing accidental cutting by a cable cutter when it is necessary to selectively cut a cable to be cut among a plurality of cables (communication cables, power cables, etc.) existing in the same route.

Background Art

[0002] Various means for preventing accidental cutting when removing communication cables, power cables, etc. have been proposed. However, most of them are like the technology disclosed in Patent Document 1, which detects the presence or absence of energization of a cable and, when energization is confirmed, prevents cutting. In fact, the prevention of accidental cutting of communication cables for which the presence or absence of energization cannot be confirmed relies on analog technology.

[0003] Here, the technology (accidental cutting prevention device) disclosed in Patent Document 1 is to attach a clamp sensor having a C-shaped opening / closing part to the cutting blade of a cutting tool for cable cutting. In an accidental cutting prevention device having such a configuration, the presence or absence of energization of the inserted cable is inspected by inserting the cable to be cut between the paired cutting blades and closing the clamp sensor. As a result of the inspection, if it is determined that the cable is energized, the locking member operates and the cutting blade of the cutting tool cannot be closed, preventing the cable from being cut.

[0004] With such an accidental cutting prevention device, it is considered possible to avoid accidentally cutting a cable (live wire) for which energization is confirmed. However, when the cable bundle is a communication cable, a situation may occur where no energization is recognized even in a cable that is not the cutting target. In such a case, even if a cable that is not the cutting target is included in the cable inserted into the clamp sensor, the locking member does not operate, and there is a possibility of accidentally cutting a cable that is not the cutting target.

Prior Art Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2014-39346 [Overview of the project] [Problems that the invention aims to solve]

[0006] Therefore, the present invention aims to provide a device that prevents accidental cutting, has a simple configuration, does not require selection of cable type, ensures clarity of the cable to be cut, and prevents cables other than the cable to be cut from accidentally entering the cutting area. [Means for solving the problem]

[0007] The accidental cutting prevention device according to the present invention, which achieves the above objective, comprises an electric cutter for cutting communication and power cables, a protective frame that prevents communication and power cables other than the communication and power cables to be cut from interfering with the movable range of the cutting blade constituting the electric cutter, and a mounting joint for attaching the protective frame to the electric cutter, wherein a conductor is arranged in the shape of the frame body in the protective frame, and power is supplied to the electric cutter by connecting the protective frame to the mounting joint.

[0008] Furthermore, the accidental cutting prevention device having the above-described features may also be configured such that a power supply joint is placed between the tool body constituting the electric cutter and the battery attached to the electric cutter, forming a bypass path that prevents direct power supply from the battery to the tool body, and the power supply joint and the mounting joint are electrically connected. With these features, it becomes possible to configure the accidental cutting prevention device simply by attaching the power supply joint, the mounting joint, and the protective frame, without modifying the existing electric cutter itself.

[0009] Furthermore, in a miscut prevention device having the above-described features, it is desirable that the protective frame, when attached to the mounting joint, be configured such that the frame is positioned on the outer circumference of the cutting blade when viewed from the direction in which the communication / power cable is inserted into the cutting blade. With this feature, since the frame of the protective frame is larger than the range of motion of the cutting blade, there is no risk of cables other than the communication / power cable to be cut interfering with the range of motion of the cutting blade. [Effects of the Invention]

[0010] The accidental disconnection prevention device, having the features described above, has a simple configuration, and can ensure the clarity of the cable to be cut regardless of the type of cable, while also preventing other cables from accidentally entering the cutting area. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows the external configuration of the accidental cutting prevention device according to the embodiment. [Figure 2] This figure shows the protective ring removed from the accidental cutting prevention device according to the embodiment. [Figure 3] This is a block diagram showing the configuration of the electrical system in the accidental disconnection prevention device according to the embodiment. [Figure 4] This is a flowchart illustrating how to use the accidental cutting prevention device. [Modes for carrying out the invention]

[0012] Hereinafter, embodiments of the accidental cutting prevention device of the present invention will be described in detail with reference to the drawings. The embodiments shown below are some of the preferred forms for carrying out the present invention, and even if some of the configuration is changed, they can still be considered part of the present invention, as long as the effects are achieved.

[0013] [composition] First, the configuration of the accidental disconnection prevention device according to this embodiment will be described with reference to Figures 1 to 3. In the drawings, Figure 1 is a diagram showing the external configuration of the accidental disconnection prevention device according to this embodiment, and Figure 2 is a diagram showing the device with the protective ring removed. Figure 3 is a block diagram showing the configuration of the electrical system in the accidental disconnection prevention device according to this embodiment.

[0014] The accidental cutting prevention device 10 according to this embodiment includes an electric cutter 20, a protective frame 30, a mounting joint 40, and a power supply joint 50. The electric cutter 20 is a tool for cutting cables such as communication and power cables (hereinafter, the cable to be cut will be referred to as the cable to be cut 60, and other cables will be referred to as cables 62), and includes at least a cutting blade 22, a tool body 24, and a battery 26. The cutting blade 22 is a pincer-shaped blade equipped with a pair of opposing blades 22a and 22b, and the cutting portion is provided with a curved portion to prevent the cable to be cut 60 from slipping. The pair of opposing blades 22a and 22b slide so as to close around a base point, thereby cutting the cable to be cut 60 that is intercepted by the curved portion. The tool body 24 serves as the handle of the electric cutter 20 and supports the base of the cutting blade 22, and is an element that operates the cutting blade 22 by pulling the trigger 24a, which activates a motor (not shown) or the like provided inside. Furthermore, the battery 26 is preferably a rechargeable battery and is an element that plays the role of supplying power to the tool body 24.

[0015] The protective frame 30 is an element that prevents the cable 62 from interfering with the movable range of the cutting blade 22 that constitutes the electric cutter 20. The protective frame 30 is a rigid frame made of a non-conductive material such as resin or FRP (fiber-reinforced plastic). The shape and size of the protective frame 30 are not specified, but it is circular when viewed from the direction in which the cable 60 to be cut is inserted when positioned parallel to the cutting blade 22, and is sized so that the frame 32 is formed on the outer circumference of the cutting blade 22.

[0016] The protective frame 30 has a conductive material 34 arranged along the shape of its frame 32, and is equipped with connection terminals 36a and 36b at the joint with the mounting joint 40, which will be described in detail later. This is so that power can be supplied to the electric cutter 20 when the protective frame 30 is attached to the mounting joint 40.

[0017] The mounting joint 40 is an element for easily and quickly securing the protective frame 30 to the electric cutter 20. Therefore, the mounting joint 40 does not need to have any specific form as long as it has some kind of joint mechanism (for example, a known one) at the connection point with the protective frame 30. In addition, the mounting joint 40 is positioned near the cutting blade 22 of the electric cutter 20 in order to ensure its function.

[0018] The power supply joint 50 is an element for controlling the power supply to the electric cutter 20. Specifically, the protective frame 30 is fixed to the mounting joint 40, enabling the power supply to the electric cutter 20. For this reason, the power supply joint 50 is positioned between the tool body of the electric cutter 20 and the battery 26, forming a bypass path for the current. Specifically, it is equipped with connection terminals 50a to 50d corresponding to the positive terminal 26a and negative terminal 26b of the battery 26, and the positive terminal 24b and negative terminal 24c of the tool body 24. A power supply path (preferably a power supply path connecting the positive terminals 26a and 24b) is routed to the mounting joint 40, connecting at least one of the connection terminals 50a and 50b corresponding to the positive terminals 26a and 24b, and the connection terminals 50c and 50d corresponding to the negative terminals 26b and 24c. The current path routed to the protective frame 30 is connected to connection terminals 42a and 42b, which are located at positions corresponding to connection terminals 36a and 36b of the protective frame 30. With this configuration, when the protective frame 30 is attached (connected) to the mounting joint 40, connection terminals 36a and 36b and connection terminals 42a and 42b come into contact, creating a current path (bypass path) between positive terminal 26a and positive terminal 24b.

[0019] [Function and Effect] Next, a method of using the cable mis-cutting prevention device configured as described above will be explained. First, remove the protection frame 30 from the mounting joint 40, and pass the cable to be cut 60 through the frame body 32 of the protection frame 30 from the end of the cable to be cut 60 (S10). After passing the cable to be cut 60 through the protection frame 30, move the protection frame 30 to the cutting position. At this time, since the cable (such as a communication or power cable) inserted into the protection frame 30 is only the cable to be cut 60, there is no risk that other cables 62 will intervene in the frame body 32 of the protection frame 30 (S20).

[0020] After moving the protection frame 30 to the cutting position, connect the protection frame 30 to the mounting joint 40 that is pre-attached to the electric cutter 20. As a result, an energization path (bypass path) through the energization joint 50 is connected, and power supply from the battery 26 to the tool body 24 will be achieved (S30).

[0021] With the protection frame 30 attached to the electric cutter 20, insert the cable to be cut 60 inserted into the protection frame 30 between the cutting blades (between the opposing blades 22a and 22b that form a pair constituting the cutting blade 22) (S40). Then, operate the trigger 24a of the tool body 24 to activate the cutting blade 22 and cut the cable to be cut (S50).

[0022] By cutting the cable to be cut 60 in this way, it is possible to configure the mis-cutting prevention device 10 without the need to modify the existing electric cutter 20 itself. Also, while having a simple configuration, it is possible to ensure the clarity of the cable to be cut 60. Further, it is possible to prevent other cables 62 from accidentally intervening in the cutting area by the cutting blade 22. For this reason, it is possible to effectively prevent the mis-cutting of the cable 62.

Explanation of Reference Numerals

[0023] 10………Anti-cutting device, 20………Electric cutter, 22………Cutting blade, 22a,22b………Opposite blades, 24………Tool body, 24a………Trigger, 24b………Positive terminal, 24c………Negative terminal, 26………Battery, 26a………Positive terminal, 26b………Negative terminal, 30………Protective frame, 32………Frame, 34………Conductor, 36a,36b………Connecting terminals, 40………Mounting joint, 40a,40b…Connecting terminals, 50…Electrified joint, 60………Cable to be cut, 62…Cable.

Claims

1. Electric cutters for cutting communication and power cables, A protective frame made of a non-conductive material prevents communication and power cables other than the communication and power cables to be cut from interfering with the movable range of the cutting blades that constitute the electric cutter, A mounting joint for attaching the protective frame to the electric cutter, The electric cutter has a power-carrying joint that can be positioned between the tool body and the battery attached to the electric cutter, The power supply joint is configured with a bypass path that prevents direct power supply from the battery to the tool body, and the bypass path is routed to the mounting joint. The accidental cutting prevention device is characterized in that the protective frame has a conductor arranged in accordance with the shape of the frame, and by connecting the protective frame to the mounting joint, the bypass path is established, and power is supplied from the battery to the tool body.

2. When the protective frame is attached to the mounting joint, The accidental cutting prevention device according to claim 1, characterized in that the frame is positioned on the outer circumference of the cutting blade when viewed from the direction in which a communication / power cable is inserted into the cutting blade.

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