JP6017202B2 - Cable coating stripping tool - Google Patents

Description

  The present invention relates to a tool that is attached to a rotary tool and strips a coating.

  Conventionally, a cable having a coating layer formed around a conducting wire, such as a CV cable, a CVD cable, a CVT cable, or a CVQ cable, is generally used as a trunk cable between an electric power company and a distribution board. The CV cable is an abbreviation for a crosslinked polyethylene insulated vinyl sheath cable. As shown in FIG. 1, the CV cable 50 is a cable in which a conducting wire 51 is covered with a crosslinked polyethylene 52a and a vinyl sheath 52b. CVD cables, CVT cables, and CVQ cables are power cables obtained by twisting single-core CV cables in order to improve workability and allowable current value. A cable using two stranded wires is called a CVD cable, a cable using three stranded wires is called a CVT cable, and a cable using four stranded wires is called a CVQ cable.

  During construction, these cables are peeled off from a cross-linked polyethylene covering layer and a vinyl sheath covering layer (hereinafter collectively referred to as a “covering layer”), and are connected to a necessary portion by exposing a conductive wire. The coating layer, especially the cross-linked polyethylene coating layer is hard and difficult to peel off, and there is no work space in the distribution board. Therefore, work with hand tools such as cutters and electric knives is inefficient, and workers It is easy to get hurt. For this reason, cable sheath strippers that have various driving devices or are used by being connected to the driving devices have been proposed.

  In Patent Document 1, “a cylindrical support body having a front opening is provided in a part of a hand-held case in which a battery and an electric motor driven by the battery are housed, and the support body has a tip. A cylindrical piece member having an open surface and forming an electric wire insertion portion is inserted from the front side and is arranged to be rotatable about its axis, and between the piece member and the electric motor. Is equipped with a drive mechanism for rotating the piece member, and further, the piece member is formed with a stopper for the electric wire inserted on the proximal end side and the tip of the transparent window formed on the peripheral wall of the piece member An invention relating to a hand-held electric wire covering stripping machine characterized in that a cutting edge protruding inward by a predetermined length is fixed to the side is disclosed.

  In Patent Document 2, an introduction port for introducing a covered wire is provided at one end of the cylindrical main body, a discharge port for deriving a covering material of the coated wire peeled off from the side peripheral wall of the cylindrical main body is provided, While providing a contact portion that stops the core wire after the covering material is peeled off at a predetermined position at a predetermined position, and projecting a blade body for peeling the covering material of the covering wire toward the inside of the discharge port, A polishing member for polishing the outer periphery of the core wire is provided at an intermediate position between the blade body and the contact portion in the cylindrical main body, and the coating material of the coated wire is peeled off by rotating the blade body around the coated wire. An invention relating to a coating stripping device characterized by the above is disclosed.

  Patent Document 3 states that “a grip portion that can be connected to a rechargeable battery, and an upper end portion of the grip portion that extends horizontally and is integrally formed with the grip portion, and can be driven by the battery. A drive unit provided with a drive motor, a cylindrical support base having a through hole formed integrally with the drive unit at an upper part of the drive unit, and a through hole of the support base. In a rechargeable cable sheath stripping machine having an attachment body having an attachment body having a substantially cylindrical shape with a through hole formed in an axial direction, which is rotated by a driving force from a driving motor of the driving unit when mounted. A work table for attaching a cutting edge for stripping the cable covering is provided in the opening formed in the attachment body, and the work table is configured to remove the covering material breakage piece cut by the cutting edge. Rechargeable cable jacket stripping machine, characterized in that it has a guide plate for guiding the body radially outward of the. Invention relates "is disclosed.

  Patent Document 4 states that “a stripping tool used for stripping a cable having a conductor, an insulator covering the conductor, and a sheath covering the insulator, and a rotary driving body that is electrically or manually rotated; An invention relating to a peeling tool comprising: an insulator stripping piece that rotates while being connected to the rotary drive body; and a sheath stripping piece that is connected to and rotates with the insulator stripping piece. Has been.

JP-A-7-336833 Japanese Patent Laid-Open No. 11-332048 JP 2001-268740 A JP 2007-110874 A

  As described above, in Patent Documents 1 to 4, the cutter is protruded from the inner peripheral surface of the cylindrical main body, and the cable covering layer is peeled off. For example, forming an exposure length regulating means is described.

  However, if the operator pushes off the coating layer too quickly and the pushing force of the rotary tool onto the cable becomes excessive, the cutting width when the coating layer is stripped by the cutting means will be larger than expected, and the coating layer will be discharged. It becomes difficult. In particular, if the coating layer chips get stuck inside the cable coating stripping tool, not only will the work be interrupted, but in the worst case, the connection to the rotating tool (usually the hexagonal shaft) will be damaged. There's a problem.

  The present invention has been made in order to solve such a problem of the prior art, and by improving the workability by preventing clogging of chips of the coating layer, the connecting portion to the rotary tool is provided. It aims at providing the cable coating stripping tool which can reduce the failure | damage of a cable.

  The gist of the present invention is the following cable covering stripping tool (1) to (5).

(1) A tool for stripping the coating of a cable having a coating layer formed around a conducting wire, comprising a hollow shaft-shaped main body portion and a cutting means, and the main body portion is connected to the cable at one end in the axial direction. Each has a discharge port for discharging chips of the peeled coating layer on the peripheral surface, and the cutting means has a cutting edge that cuts through the coating layer and a stripped surface. An L-shaped cutting edge having a cutting edge for separating the coating layer from the conducting wire, and the cutting edge protrudes from the discharge port to the inner peripheral surface of the main body part. A first restricting means for restricting a cutting width when the covering layer is peeled off by the cutting means; and a second restricting means for restricting the exposed length of the conductive wire after the covering layer is peeled off by the cutting means. provided, the main body portion, the opposite end of the insertion opening, connects the bit, the bit Have constructed tool connection portion between the bit connection holes of fit, one end of the bit is used to connect to the rotary tool, and the other end is used as the second regulating means,
The second regulating means has a position adjusting mechanism for changing the mounting position of the bit in the bit connection hole, and the position adjusting mechanism is a locking member made of corrugated irregularities provided on the outer surface of the bit. And a locking portion provided with corrugated irregularities built in the bit connection hole, the bit is fixed by advancing the latching portion and meshing the corrugated irregularities, and the latching The bit is movable by retracting the part and separating the corrugated irregularities, and with the cable inserted into the insertion port, the body part is rotated around the axis, whereby the cable Cable coating stripping tool that strips the coating layer.

(2) The cutting edge that cuts through the coating layer is a cutting edge that extends in the radial direction of the main body, and the cutting edge that separates the stripped coating layer from the conductive wire is a cutting edge that extends in the axial direction of the main body. there, cable sheathing stripping tool (1).

  According to the cable coating stripping tool according to the present invention, clogging of chips of the coating layer can be prevented. As a result, the opportunity to interrupt the work to remove chips and the opportunity to break the connection to the rotary tool can be greatly reduced, and the efficiency of the cable sheath stripping work is greatly improved. be able to.

Diagram illustrating CV cable The figure which illustrated the cable coating stripping tool which concerns on this invention (a) Front view (b) AA partial sectional drawing (c) B view figure The figure which shows the usage example of the cable coating stripping tool which concerns on this invention (a) The state before stripping (b) The state in the middle of stripping (c) The state after stripping The figure which shows the example of the cutting means which concerns on this invention The figure which shows the example of the position adjustment mechanism which concerns on this invention The figure which shows the other example of the position adjustment mechanism which concerns on this invention

  The embodiment of the cable coating stripping tool according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 2 to 4, the cable coating stripping tool 10 according to the present invention includes a hollow shaft-shaped main body 1 and cutting means 2. The main body 1 has an insertion port 1a for inserting a cable 30 having a coating layer 30b formed around the conducting wire 30a at one end in the axial direction, and a discharge for discharging the stripped coating layer on the peripheral surface. And an outlet 1b. The cutting means 2 has blade edges 2a and 2d protruding from the discharge port 1b to the inner peripheral surface 1c of the main body 1. In the cable covering stripping tool 10, the first restricting means 3 for restricting the cutting width 30 c when the covering means is peeled off by the cutting means 2 and the cutting means 2 are provided on the inner peripheral surface 1 c of the main body 1. And a second restricting means 4 for restricting the exposed length 30d of the conductor after the covering layer is peeled off.

  As shown in FIG. 3 (a), in the cable covering stripping tool 10 according to the present invention, first, the tip of the cable 30 is inserted into the insertion port 1a, and in that state, as shown in FIG. 3 (b), When the main body 1 is rotated around its axis while pushing the cable 30 into the insertion port 1a, the covering layer 30b of the cable 30 is peeled off. At this time, since the cable regulating stripping tool 10 according to the present invention is provided with the first regulating means 3, the cutting width 30c of the coating layer 30b of the cable 30 does not exceed a certain value. For this reason, clogging of the chip 30e of the coating layer can be prevented, and the efficiency of the cable coating peeling operation can be significantly improved.

  Subsequently, when the stripping operation of the covering layer 30b is further advanced while pushing the cable 30 into the insertion port 1a, the exposed tip of the conductive wire 30a comes into contact with the second restricting means 4 as shown in FIG. , You can't push it deeper. This makes it possible to regulate the exposed length 30d of the conducting wire 30a after the covering layer 30b is peeled off by the cutting means 2. Here, the 2nd control means 4 may be fixed by the fixed depth. The second restricting means 4 may be fixed by a known method such as welding or pressure bonding, or the second restricting means 4 may be made of a magnetic material and joined to the inner bottom portion of the main body 1 by its magnetic force. It is preferable that the 2nd control means 4 has a mechanism which can adjust the position especially. This is because, if such a mechanism is provided, the exposed length 3d of the conducting wire 30a can be adjusted.

  In addition, as a position adjustment mechanism of the 2nd control means 4, the system does not ask | require, for example, the method of providing a hole in the radial direction of the main-body part 1 at predetermined intervals, and inserting a pin there. A preferred configuration of the position adjusting mechanism will be described in detail later.

  Here, it is preferable that the 1st control means 3 controls the cutting width 30c at the time of peeling of the coating layer 30b below the axial direction length (code | symbol 2c of FIG. 4) of the blade edge | tip 2a. This is because by providing the first restricting means 3 at such a position, the chips 30e of the coating layer can be easily discharged. Although there is no restriction | limiting in particular in the form of the 1st control means 3, For example, as shown in FIG.2 (c), the surface (henceforth a "sliding surface") where the front-end | tip of the coating layer 30b slides. However, what is formed continuously over substantially the entire circumference of the inner surface of the main body 1 is preferable. Of course, the sliding surface of the 1st control means 3 may be divided | segmented into plurality. However, it is important that the coating layer does not hinder the smooth rotation of the coating layer 30b.

  The discharge port 1b is not limited as long as at least the cutting edge 2a of the cutting means 2 can be visually recognized from the outside and can discharge the chip 30e of the coating layer. In particular, the axial rear end of the cutting edge 2a of the cutting means 2 (see FIG. 2 (a), it is preferable to have a space in which chips 30e can be discharged backward (leftward in FIG. 2 (a) and FIG. 4) from the left edge of the blade edge 2a in FIG.

  Even with the configuration of the present invention, if the pushing force of the cable 30 into the insertion port 1a is too strong, the cutting width 30c may be slightly larger than the axial length of the blade edge 2a. However, even in such a case, if the discharge port 1b has a space in which the chips 30e can be discharged backward from the axial rear end of the cutting edge 2a of the cutting means 2, the chips 30e of the coating layer are provided. There is no hindrance to the discharge of water.

  As shown in FIG. 4, it is preferable that the cutting means 2 has L-shaped cutting edges 2a and 2d. If it is a cutting | disconnection means of such a structure, as shown in above-mentioned FIG.3 (b), first, it will cut through the coating layer 30b with the blade edge 2d of the perpendicular direction, and the chip | tip 30e peeled off will be horizontal. Since it is separated from the lead wire 30a by the cutting edge 2a and lifted, it is easily discharged from the discharge port 1b as it is.

  As shown in FIG. 2, the cable sheath stripping tool 10 according to the present invention can perform the stripping operation of the cable sheath by manually rotating the body portion 1. If it is set as the structure which has the tool connection part 5 in an other end, it will become possible to connect and use with a rotary tool (illustration omitted).

  When using a rotary tool in which the connecting portion is formed of a hexagonal hole, such as an impact driver, the tool connecting portion 5 may be configured to have a hexagonal bit 5a as shown in FIG. For example, when using a rotary tool in which the connecting portion is formed of a quadrangular prism, a configuration having a square hole (not shown) may be used. In particular, in the case of a configuration having the bit 5a, a configuration in which the bit 5a is press-fitted and fixed to the opposite end of the insertion port 1a may be employed, but a configuration having a bit connection hole 5b for connecting the bit 5a may be employed. In particular, the bit connection hole 5b is preferably configured so that the bit 5a can be attached and detached.

  The cable size ranges from about 9.4 mm to about 31 mm in outer diameter, but the exposed length 30d of the conducting wire 30a varies depending on the size of the cable. If it is the structure which can adjust the position of the 2nd control means 4, it will become possible to finish to the exposure length 30d suitable for each size. Therefore, it is possible to basically perform several types of cable stripping work with the same outer diameter with a single cable stripping tool.

  As a configuration capable of adjusting the position of the second regulating means, for example, the configuration of FIG. 5 can be employed. That is, the cable coating stripping tool 10 a has a position adjusting mechanism 6. The position adjusting mechanism 6 includes a sleeve 6a, a locking member 6b having corrugated irregularities, a spring 6c, and a shaft portion 6d. The shaft portion 6d is provided with a second restricting means 4 at one end, a bit attaching / detaching means 7 having a bit connection hole at the other end, and a locking portion 6e made of corrugated irregularities at the center.

  Here, in the position adjusting mechanism 6, the sleeve 6a is urged in the axial direction (in the left or right direction in the figure, in the example shown in the figure, in the right direction) by a built-in spring 6c. The locking member 6b is pushed by the recess 6f on the inner surface of the sleeve 6a and is in contact with the locking portion 6e. At this time, corrugated irregularities formed on both the locking member 6b and the locking portion 6e are engaged, and movement in the axial direction is restricted. On the other hand, when the sleeve 6a is moved in the axial direction (left or right direction in the figure, left direction in the example shown) against the bias of the spring 6c, the built-in locking member 6b moves backward. Since it is separated from the locking portion 6e, the shaft portion 6d can be moved. In this state, the position of the second restricting means 4 can be adjusted. At this time, a scale or other mark is preferably attached to the shaft portion 6d. This is because the second restricting means 4 can be easily adjusted to the target position.

  The bit attaching / detaching tool 7 is for inserting the bit 8 into the bit connecting hole and connecting it to a rotary tool (not shown), and the bit 8 is detachably gripped. The sleeve 7a of the bit attaching / detaching tool 7 is urged in a left or right direction in the drawing by a built-in spring (not shown), and when moved against the urge, a built-in locking member ( A ball, a pin, a polyhedron, etc. (not shown) are retracted, the bit 8 can be removed, and the bit 8 is held by returning the sleeve 7a to the original position while the bit 8 is inserted.

  The bit attaching / detaching tool 7 is not essential, and may be press-fitted and fixed to the shaft portion 6d. However, if the bit breaks, the entire cable covering stripping tool must be replaced, increasing the replacement cost. For this reason, the structure provided with the bit attachment / detachment tool 7 is preferable.

  One end of the bit 5a may be used for connection to a rotary tool (not shown), and the other end may be used as the second restricting means 4. With such a configuration, the number of parts can be reduced, which contributes to a reduction in manufacturing cost. Moreover, it can prevent that the front-end | tip of a cable contacts and damages the inner bottom part of the main-body part 1 at the time of use. In particular, if it has a mechanism that can change the attachment position of the bit 5a to the bit connection hole 5b, the position of the second restricting means 4 can be adjusted, so that the exposed length 30d of the conducting wire 30a can be adjusted. In particular, the exposed length 30d of the conducting wire 30a can be adjusted at low cost if it has a mechanism that can change the attachment position of the bit 5a to the bit connection hole 5b.

There is no particular restriction on the mechanism for changing the mounting position of the bit 5a to the bit connection hole 5b.
(A) As shown in FIG. 6 (a), a sphere 5c that can be inserted and removed and a bit 5e having a plurality of grooves 5d in which the sphere 5c is accommodated are prepared, and the position of the bit 5e depends on the position of the groove 5d that accommodates the sphere 5c. A mechanism that can change the mounting position in the bit connection hole (not shown),
(B) As shown in FIG. 6B, a bit 5g having a screw 5f cut and a gear 5h adapted to the screw 5f are prepared. By rotating the gear 5h, the bit 5g is rotated and the axial direction is set. A mechanism that can change the position and change the attachment position of the bit 5g to the bit connection hole (not shown), or
(C) A mechanism that can control the movement / fixation of the bit in the axial direction by an externally attached screw to change the attachment position of the bit to the bit connection hole can be used.
Among these, it is preferable to employ (a) or (b).

  Here, it is preferable to use a material made of a lightweight metal material such as an aluminum alloy as the material of the main body 1. However, when the steel bit 5a is press-fitted into the bit connection hole 5b of the aluminum alloy main body 1, the bit 5a being used is not rattled and removed from the tip of the bit 5a. It is preferable to use a knurled pattern engraved on all or part of the surface up to the center. The knurled bit 5a can be obtained, for example, by using a round shaft as a material and engraving a knurled pattern from the tip to the center, and then processing the rear end in a bit shape. Is preferred.

  According to the cable coating stripping tool according to the present invention, clogging of chips of the coating layer can be prevented. As a result, the opportunity to interrupt the work to remove chips and the opportunity to break the connection to the rotary tool can be greatly reduced, and the efficiency of the cable sheath stripping work is greatly improved. be able to.

DESCRIPTION OF SYMBOLS 1 Main-body part 1a Insertion port 1b Discharge port 1c Inner peripheral surface 2 Cutting means 2a, 2d Blade edge 2b Fastener 2c Length of blade edge in the axial direction 3 First restriction means 4 Second restriction means 5 Tool connection part 5a, 5e, 5g Bit 5b Bit connection hole 5c Ball 5d Groove 5f Screw 5h Gear 6 Position adjustment mechanism 6a Sleeve 6b Locking member 6c Spring 6d Shaft 6e Locking portion 6f Recess 7 Bit attaching / detaching tool 7a Sleeve 8 Bit 10, 10a Cable covering according to the present invention Stripping tool 30 Cable 30a Lead wire 30b Cover layer 30c Cutting width 30d Lead exposed length 30e Chip 50 CV cable 51 Lead wire 52 Cross-linked polyethylene 53 Vinyl sheath

Claims (2)

A tool for stripping a cable covering in which a covering layer is formed around a conductor,
A hollow shaft-shaped main body, and a cutting means,
The main body has an insertion port for inserting the cable at one end in the axial direction, and a discharge port for discharging chips of the peeled coating layer on the peripheral surface,
The cutting means includes an L-shaped cutting edge having a cutting edge that cuts through the coating layer and a cutting edge that separates the stripped coating layer from the conductive wire, and the cutting edge projects from the discharge port to the inner peripheral surface of the main body. And
On the inner peripheral surface of the main body portion, a first restricting means for restricting a cutting width when the covering layer is peeled off by the cutting means, and an exposed length of the conductive wire after the covering layer is peeled off by the cutting means And a second regulating means for regulating the thickness,
The main body portion has a tool connection portion composed of a bit and a bit connection hole for connecting the bit at the opposite end of the insertion port, and one end of the bit is connected to the rotary tool. Used, the other end is used as the second regulating means,
The second restricting means has a position adjusting mechanism for changing an attachment position of the bit to the bit connection hole,
The position adjustment mechanism has a locking member made of corrugated irregularities provided on the outer surface of the bit, and a latching portion having corrugated irregularities built in the bit connection hole, The bit is fixed by moving forward and meshing the corrugated irregularities, and moving the bit by moving the engaging portion backward and releasing the corrugated irregularities,
A cable coating stripping tool for stripping the coating layer of the cable by rotating the main body around the axis in a state where the cable is inserted into the insertion port. The cutting edge that cuts through the coating layer is a cutting edge that extends in the radial direction of the main body,
The cable coating stripping tool according to claim 1, wherein a cutting edge that separates the stripped coating layer from the conductive wire is a cutting edge extending in an axial direction of the main body.