JP7453022B2 - cable cutter - Google Patents

Description

TECHNICAL FIELD This disclosure relates to cable cutters.

When connecting a communication cable in which a conductor is covered with an insulating cover (see Patent Document 1), it is necessary to peel off the insulating cover at the end of the cable to expose the conductor. In order to peel off the insulating cover from the end of the cable, it is necessary to provide a circumferential cut and an axial cut in the insulating cover.

Japanese Patent Application Publication No. 2005-073207

The circumferential cut can be safely and easily made using a known pipe cutter. On the other hand, the axial cut must be made using a knife-shaped cutter.

However, the communication cables and power cables described above have large diameters and thick insulating covers. Therefore, it takes a lot of effort to cut the insulating cover in the axial direction of the cable with a knife-shaped cutter. Furthermore, there is a risk that the user may be injured by the cutter.

One aspect of the present disclosure is to provide a cable cutter that can improve the efficiency and safety of cutting an insulating cover in the axial direction of a cable.

One aspect of the present disclosure is a cable cutter that cuts an insulating cover of a cable that includes a conductor and an insulating cover that covers the conductor. The cable cutter includes an insertion part configured to allow the cable to be inserted in the axial direction of the cable, and a blade configured to form a cutting line in the insulating cover of the cable along the axial direction of the cable within the insertion part. Equipped with.

According to such a configuration, by passing the cable through the insertion portion in the axial direction, the insulating cover is cut in the axial direction by the blade within the insertion portion. Therefore, by moving the cable cutter relative to the cable in the axial direction of the cable, the insulation cover can be cut efficiently. Furthermore, since the insulating cover is cut within the insertion portion, the safety of the user is increased.

One aspect of the present disclosure may further include an adjustment mechanism that moves the blade in the radial direction of the cable inserted into the insertion portion. According to such a configuration, the blade can be brought into contact with the insulating cover after the cable is passed through the insertion portion, so that work efficiency during cable insertion is improved. Moreover, one cable cutter can be used in common for a plurality of types of cables having different outer diameters and different thicknesses of insulating covers.

One aspect of the present disclosure may further include a grip portion that protrudes from the insertion portion in a direction in which the cable is inserted into the insertion portion or in a direction perpendicular to the insertion direction. According to such a configuration, when the user holds the grip part, the cable can be easily moved relative to the cable cutter, so that the efficiency of cutting the insulating cover is improved.

In one aspect of the present disclosure, the blade may rotate about a rotation axis that is orthogonal to a virtual plane that includes a central axis of a cable inserted into the insertion portion. According to such a configuration, the resistance when the blade cuts the insulating cover is reduced, so the efficiency of the cutting operation of the insulating cover is improved.

1A is a schematic plan view of the cable cutter in the embodiment, FIG. 1B is a schematic front view of the cable cutter of FIG. 1A, and FIG. 1C is a schematic side view of the cable cutter of FIG. 1A. It is a diagram. FIG. 2A is a schematic diagram of the cable before the insulation cover is cut, and FIG. 2B is a schematic diagram of the cable after the insulation cover is cut by the cable cutter of FIG. 1A. 3A is a schematic front view of the blade and adjustment mechanism in the cable cutter of FIG. 1A, and FIG. 3B is a schematic side view of the blade and adjustment mechanism of the cable cutter of FIG. 1A. FIG. 4A is a schematic plan view showing the cable cutter in FIG. 1A in use, and FIG. 4B is a schematic side view showing the cable cutter in FIG. 1A in use. 5A is a schematic plan view of the cable cutter in a different embodiment from FIG. 1A, FIG. 5B is a schematic front view of the cable cutter of FIG. 5A, and FIG. 5C is a schematic front view of the cable cutter of FIG. 5A. FIG. FIG. 6A is a schematic plan view showing the cable cutter in FIG. 5A in use, and FIG. 6B is a schematic side view showing the cable cutter in FIG. 5A in use.

Embodiments to which the present disclosure is applied will be described below with reference to the drawings.
[1. First embodiment]
[1-1. composition]
The cable cutter 1 shown in FIGS. 1A, 1B, and 1C is used when electrically connecting the cable C shown in FIG. 2A to another cable or terminal.

Specifically, the cable cutter 1 is configured to cut the insulating cover C2 of the cable C in the axial direction of the cable C in order to expose the conductor C1 at the end of the cable C.

The cable C has a conductor C1 and an insulating cover C2 covering the conductor C1. The conductor C1 may be composed of a plurality of covered wires. Cable C is used, for example, as a communication cable or a power cable in railway facilities.

The cable cutter 1 includes an insertion part 2, a blade 3, a support part 4, an adjustment mechanism 5, a first grip part 6, and a second grip part 7. In this embodiment, the insertion direction of the cable C into the insertion part 2 is the X direction, the direction in which the first grip part 6 and the second grip part 7 protrude from the insertion part 2 is the Y direction, and the X direction and the Y direction. The orthogonal direction is defined as the Z direction.

<Insertion part>
The insertion portion 2 is configured to allow the cable C to be inserted in the axial direction (that is, the longitudinal direction) of the cable C.

The insertion portion 2 has an internal space through which the cable C passes. Specifically, the insertion part 2 has a circular first opening 2A and a second circular opening 2B through which the cable C can pass. The diameter of each of the first opening 2A and the second opening 2B is larger than the outer diameter of the cable C.

The cable C passes through the first opening 2A and enters the insertion portion 2, passes through the second opening 2B and exits from the insertion portion 2. The first opening 2A and the second opening 2B are spaced apart from each other in the X direction.

<Blade>
The blade 3 is configured to form a cutting line along the axial direction of the cable C on the insulation cover C2 by coming into contact with the insulation cover C2 of the cable C within the insertion portion 2.

As shown in FIGS. 3A and 3B, the blade 3 rotates around a rotation axis P that is orthogonal to a virtual plane (that is, an XZ plane) that includes the central axis of the cable C inserted into the insertion portion 2. Specifically, the blade 3 is rotatably supported by a shaft portion 5D of an adjustment mechanism 5, which will be described later.

The blade 3 contacts the insulating cover C2 of the cable C when the cable C passes through the insertion part 2, thereby rotating the insulating cover C2 in the axial direction of the cable C (that is, in the X direction) while rotating within the insertion part 2. Cut into. The rotation axis P and the thickness direction of the blade 3 are each parallel to the Y direction.

The blade 3 is arranged between the first opening 2A and the second opening 2B of the insertion portion 2 in the X direction. The blade 3 is moved in the Z direction between the inside of the insertion section 2 and the outside of the insertion section 2 by an adjustment mechanism 5, which will be described later.

The tip (that is, the cutting edge) of the blade 3 is parallel to the axial direction of the cable C. Therefore, the blade 3 can cut the insulating cover C2 only along the axial direction of the cable C. Further, the tip of the blade 3 is arranged at a position overlapping with the conductor C1 of the cable C, preferably at a position overlapping with the central axis of the cable C, when viewed from the radial direction of the cable C.

<Support part>
The support portion 4 shown in FIGS. 1B and 1C is a cylindrical portion that protrudes from the insertion portion 2 in the Z direction. The support portion 4 is arranged so that its central axis is parallel to the Z direction. The support portion 4 accommodates a part of an adjustment mechanism 5, which will be described later.

<Adjustment mechanism>
The adjustment mechanism 5 moves the blade 3 in the radial direction of the cable C inserted through the insertion portion 2 (Z direction in this embodiment). As shown in FIGS. 3A and 3B, the adjustment mechanism 5 includes a knob 5A, a connecting portion 5B, a moving portion 5C, a shaft portion 5D, a threaded portion 5E, and a nut portion 5F.

The knob 5A is rotatably supported by the connecting portion 5B around a central axis parallel to the Z direction. A nut portion 5F is fixed to the end of the knob 5A near the blade 3. The connecting portion 5B is housed in the support portion 4 and is fixed to the support portion 4.

The moving part 5C is connected to the knob 5A via a screw part 5E and a nut part 5F. A shaft portion 5D is attached to the end of the moving portion 5C opposite to the knob 5A. The end of the moving part 5C opposite to the shaft part 5D is housed in the connecting part 5B. The moving part 5C is restricted from rotating about a central axis parallel to the Z direction by the connecting part 5B. Therefore, the direction of the rotation axis P of the blade 3 in the cable cutter 1 is constant (that is, always parallel to the Y direction).

The threaded portion 5E is rotatably connected to the moving portion 5C about a central axis parallel to the Z direction. However, the threaded portion 5E is restricted from moving in the Z direction relative to the moving portion 5C. Further, the end of the threaded portion 5E on the opposite side from the moving portion 5C is screwed into the nut portion 5F.

The nut portion 5F rotates together with the knob 5A around a central axis parallel to the Z direction. The threaded portion 5E is fed in the Z direction by the rotation of the nut portion 5F. Therefore, by rotating the knob 5A, the moving part 5C connected to the threaded part 5E moves in the Z direction.

<Grip part>
The first grip part 6 is a rod-shaped or cylindrical part that protrudes from the insertion part 2 in a direction (Y direction in this embodiment) perpendicular to the direction in which the cable C is inserted into the insertion part 2 .

The second gripping portion 7 is a cylindrical or cylindrical portion that protrudes from the insertion portion 2 on the opposite side to the first gripping portion 6 . The first gripping part 6 and the second gripping part 7 are arranged to sandwich the insertion part 2 in the Y direction.

The lengths of the first gripping part 6 and the second gripping part 7 in the Y direction are set so that the user of the cable cutter 1 can easily grip them. The first gripping part 6 and the second gripping part 7 may have different lengths or diameters in the Y direction.

[1-2. how to use]
Next, a method of using the cable cutter 1 (that is, a method of cutting the insulating cover C2 using the cable cutter 1) will be described.

First, as shown in FIG. 2B, a first cutting line L1 along the circumferential direction of the cable C is formed on the insulating cover C2 of the cable C. The first cutting line L1 can be formed by cutting the insulating cover C2 in the circumferential direction using a known pipe cutter.

Next, the cable C is inserted into the insertion part 2 of the cable cutter 1. When inserting the cable C, the adjustment mechanism 5 moves the blade 3 to a position where it does not come into contact with the insulating cover C2. After the cable C is inserted, the blade 3 is moved closer to the cable C by the adjustment mechanism 5, and the blade 3 abuts against the insulating cover C2 so as to be inserted in the radial direction of the cable C.

Thereafter, as shown in FIGS. 4A and 4B, by moving the cable C in the X direction relative to the cable cutter 1 and passing the cable C through the insertion part 2, the cable C is inserted into the insulation cover C2 along the axial direction of the cable C. A second cutting line L2 (see FIG. 2B) is formed.

When passing the cable C through the insertion part 2, the user grips the first grip part 6 and the second grip part 7. While holding the first gripping part 6 and the second gripping part 7, the cable C may be moved relative to the cable cutter 1, the cable cutter 1 may be moved relative to the cable C, or the cable C may be moved relative to the cable C. Both the cable cutter 1 and the cable cutter 1 may be moved.

The user allows the cable C to pass through the insertion portion 2 without rotating it in the circumferential direction (that is, rotating the axis). That is, the blade 3 cuts the insulating cover C2 in the axial direction of the cable C by moving relative to the insulating cover C2 only in the axial direction of the cable C (that is, in the X direction). The blade 3 does not move relative to the insulating cover C2 in the circumferential direction of the cable C.

When the end of the cable C passes through the insertion part 2, the cable C is removed from the cable cutter 1, and the formation of the second cutting line L2 is completed. The second cutting line L2 is parallel to the axial direction of the cable C. Thereafter, the conductor C1 is exposed by peeling off the insulating cover C2 from the conductor C1 along the first cutting line L1 and the second cutting line L2.

[1-3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) By passing the cable C through the insertion portion 2 in the axial direction, the insulating cover C2 is cut in the axial direction by the blade 3 within the insertion portion 2. Therefore, by moving the cable cutter 1 relative to the cable C in the axial direction of the cable C, the insulation cover C2 can be efficiently cut. Furthermore, since the insulating cover C2 is cut within the insertion portion 2, safety for the user is increased.

(1b) Since the adjustment mechanism 5 allows the blade 3 to be brought into contact with the insulating cover C2 after passing the cable C through the insertion portion 2, work efficiency during cable insertion is improved. Moreover, one cable cutter 1 can be used in common for a plurality of types of cables having different outer diameters of the cables C and different thicknesses of the insulating covers C2.

(1c) The cable C is moved relative to the cable cutter 1 by the user grasping the first gripping part 6 and the second gripping part 7 that protrude in a direction perpendicular to the direction in which the cable C is inserted into the insertion part 2. Easier to move. As a result, the efficiency of cutting the insulating cover C2 is improved.

(1d) Since the blade 3 is rotary, resistance when cutting the insulating cover C2 is reduced. As a result, the efficiency of cutting the insulating cover C2 is improved.

[2. Second embodiment]
[2-1. composition]
The cable cutter 11 shown in FIGS. 5A, 5B, and 5C is configured to cut the insulating cover C2 of the cable C in the axial direction of the cable C in order to expose the conductor C1 at the end of the cable C shown in FIG. 2A. ing.

The cable cutter 11 includes an insertion portion 12 , a blade 3 , a support portion 4 , an adjustment mechanism 5 , a first grip portion 16 , and a second grip portion 17 . Since the blade 3, the support part 4, and the adjustment mechanism 5 are the same as those of the cable cutter 1 of FIG. 1A, the same reference numerals are given and the explanation thereof will be omitted.

<Insertion part>
The insertion portion 12 is configured to allow the cable C to be inserted in the axial direction (that is, the longitudinal direction) of the cable C.

The insertion portion 12 of this embodiment is a cylindrical portion. The central axis of the insertion portion 12 is parallel to the central axis of the cable C (that is, the direction in which the cable C is inserted). The inner diameter of the insertion portion 12 is larger than the outer diameter of the cable C.

<Grip part>
The first grip part 16 of this embodiment is a cylindrical part that protrudes from the insertion part 12 in the insertion direction of the cable C into the insertion part 12 (the X direction in this embodiment).

The second gripping portion 17 of this embodiment is a cylindrical portion that protrudes from the insertion portion 12 to the opposite side to the first gripping portion 16 . The first gripping part 16 and the second gripping part 17 are arranged to sandwich the insertion part 12 in the X direction.

The insertion portion 12, the first gripping portion 16, and the second gripping portion 17 constitute one cylindrical body. The cable C passes through the second gripping part 17 and enters the insertion part 12, then passes through the first gripping part 16 and exits from the cable cutter 11.

The lengths of the first gripping part 16 and the second gripping part 17 in the X direction are set so that the user of the cable cutter 1 can easily grip them. The inner diameter of each of the first gripping part 16 and the second gripping part 17 is larger than the outer diameter of the cable C. The first gripping part 16 and the second gripping part 17 may have different lengths or inner diameters in the X direction.

[2-2. how to use]
The method of using the cable cutter 11 is similar to the method of using the cable cutter 1 of FIG. 1A.

That is, as shown in FIGS. 6A and 6B, the cable C is moved in the X direction relative to the cable cutter 1, and the cable C is passed through the first gripping part 16, the insertion part 12, and the second gripping part 17 in this order. As a result, a second cutting line L2 (see FIG. 2B) along the axial direction of the cable C is formed on the insulating cover C2.

When passing the cable C through the insertion part 12, the user grips the first grip part 16 and/or the second grip part 17. While holding the first gripping part 16 and/or the second gripping part 17, the cable C may be moved relative to the cable cutter 11, the cable cutter 11 may be moved relative to the cable C, or the cable C and the cable cutter 11 may both be moved.

[2-3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(2a) One user can insert the cable C into the cable cutter 11 by holding the first gripping part 16 and/or the second gripping part 17 that protrude in the direction in which the cable C is inserted into the insertion part 12. It becomes easy to move the object relative to the object. As a result, the efficiency of cutting the insulating cover C2 is improved.

[3. Other embodiments]
Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above embodiments and can take various forms.

(3a) In the cable cutter of the above embodiment, the blade that cuts the insulating cover does not necessarily have to be rotary. That is, the blade for cutting the insulating cover may be fixed within the insertion part.

(3b) The cable cutter of the above embodiment does not necessarily have to include the second gripping portion, and may include only one gripping portion. Further, the cable cutter does not necessarily have to include a gripping part as long as it can be moved relative to the cable.

(3c) In the cable cutter of the above embodiment, the adjustment mechanism does not necessarily need to include a screw and a nut. That is, the adjustment mechanism may adjust the position of the blade by means other than screws. Further, the cable cutter does not necessarily have to include an adjustment mechanism.

(3d) The function of one component in the above embodiment may be distributed as multiple components, or the functions of multiple components may be integrated into one component. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added to, replaced with, etc. in the configuration of other embodiments. Note that all aspects included in the technical idea specified from the words in the claims are embodiments of the present disclosure.

DESCRIPTION OF SYMBOLS 1... Cable cutter, 2... Insertion part, 2A... First opening, 2B... Second opening, 3... Blade,
4... Support part, 5... Adjustment mechanism, 5A... Knob part, 5B... Connection part, 5C... Moving part,
5D...shaft part, 5E...screw part, 5F...nut part, 6...first gripping part, 7...second gripping part,
DESCRIPTION OF SYMBOLS 11... Cable cutter, 12... Insertion part, 16... First grip part, 17... Second grip part.

Claims (3)

A cable cutter for cutting the insulating cover of a cable including a conductor and an insulating cover covering the conductor,
an insertion portion configured to allow the cable to be inserted in the axial direction of the cable;
a blade configured to form a cutting line in the insulating cover of the cable along the axial direction of the cable within the insertion portion;
a first grip part protruding from the insertion part in a direction in which the cable is inserted into the insertion part;
a second gripping portion protruding from the insertion portion on a side opposite to the first gripping portion;
Equipped with
The first gripping part and the second gripping part have a cylindrical shape that communicates with the insertion part, and the insertion part, the first gripping part, and the second gripping part are arranged so that the cable is connected to the second gripping part. The cable cutter has a single cylindrical body configured to enter the insertion part by passing through the inside of the part, and then pass through the first grip part and exit the cable cutter. The cable cutter according to claim 1,
The cable cutter further includes an adjustment mechanism that moves the blade in a radial direction of the cable inserted into the insertion portion. The cable cutter according to claim 1 or claim 2 ,
The cable cutter is configured such that the blade rotates around a rotation axis that is orthogonal to a virtual plane that includes a central axis of the cable inserted into the insertion portion.

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