JP6788883B2 - Cable coating stripping tool - Google Patents

Description

The present invention relates to a cable coating stripping tool that strips the coating provided around a cable lead.

Conventionally, as a trunk cable between an electric power company and a distribution board, 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. The CV cable is an abbreviation for a cross-linked polyethylene insulated vinyl sheath cable, and as shown in FIG. 4A, the CV cable 2 has a lead wire 2a made of an insulator 2b such as cross-linked polyethylene and an annealed copper tape 2c (or external semi-conductive). A cable coated with tape) and a vinyl sheath 2d or the like. The CVD cable, CVT cable, and CVQ cable 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.

At the time of construction, these cables are stripped of coatings such as vinyl sheath and cross-linked polyethylene to expose the conducting wires and connected to necessary places. Of the coatings, the cross-linked polyethylene layer is particularly hard and thick, and it is difficult to peel it off. Therefore, there is a problem that not only the work with a cutter or an electric knife is inefficient, but also the worker is easily injured. For this reason, various cable stripping tools have been proposed.

For example, in the electric wire outer cover peeling device described in Patent Document 1, the end of the electric wire (cable) for peeling the outer cover is inserted into the electric wire guide hole (insertion port), and the main body is pressed against the electric wire in one direction. There has been proposed an electric wire outer cover peeling device having a structure in which the outer cover is spirally cut by a cutting tool (blade) by manually rotating the wire.

Jikkenhei 4-128021 Gazette

However, when the tool of Patent Document 1 is used, every time the main body is turned around the cable to some extent, the work of releasing the main body once, changing the hand, and then turning the main body again must be repeated. However, there was room for improvement in terms of work efficiency.

Therefore, an object of the present invention is to provide a cable coating stripping tool capable of increasing work efficiency without impairing work safety.

The present invention has been made to solve the above problems, and the cable coating stripping tool of the present invention has a hollow main body portion having an insertion port for inserting a cable provided with a coating around a conducting wire. ,
The cutting means attached to the main body and
A tubular grip portion rotatably arranged on the outer peripheral side of the main body portion is provided.
By rotating the main body with respect to the cable with the cable inserted into the insertion port, the coating is spirally cut by the cutting means and separated from the lead wire.
A ratchet mechanism that regulates the rotation direction of the grip portion with respect to the main body portion in one direction is provided between the main body portion and the grip portion .
The main body is provided with an exposure length regulating means for regulating the exposure length of the lead wire.
The exposed length regulating means includes an adjusting shaft portion that extends into the main body portion and projects from the opposite end of the insertion port, and a locking mechanism that fixes the adjusting shaft portion at a predetermined position.
The lock mechanism has an engaging plate having a through hole for penetrating the adjusting shaft portion and engaging with the side surface of the adjusting shaft portion, and a pressing portion exposed on the outer surface of the main body portion, and the engaging plate has an engaging plate. With a push-in plate placed adjacent to it,
By pushing in the pressing portion, the engaging force of the engaging plate with respect to the adjusting shaft portion is weakened so that the adjusting shaft portion can be moved .

In the cable coating stripping tool of the present invention, it is preferable that the ratchet mechanism is composed of a pair of crown gear portions that engage in the axial direction along the rotation axis of the grip portion.

Further, in the cable coating stripping tool of the present invention, the pair of crown gear portions are the octagonal tubular first gear member that fits into the fitting convex portion provided on the outer peripheral surface of the main body portion. It is preferable to have an octagonal tubular second gear member that fits into a fitting recess provided on the inner peripheral surface of the grip portion.

According to the present invention, it is possible to provide a cable coating stripping tool capable of improving work efficiency without impairing work safety.

It is a perspective view of the cable coating stripping tool which concerns on one Embodiment of this invention. It is a side view of the cable coating stripping tool of FIG. It is sectional drawing which follows the AA line in the cable coating stripping tool of FIG. (A) is a diagram showing an example of a cable, and (b) is a perspective view of a cutter in the cable coating stripping tool of FIG. It is a perspective view which shows the main body part, the 1st gear member, and the 2nd gear member in the cable coating stripping tool of FIG. (A) and (b) are cross-sectional views for explaining the locking mechanism in the cable coating stripping tool of FIG.

Hereinafter, embodiments of the present invention will be illustrated and described with reference to the drawings. FIG. 1 is a perspective view of a cable coating stripping tool 1 according to an embodiment of the present invention. FIG. 2 is a side view of the cable coating stripping tool 1, and FIG. 3 is a cross-sectional view taken along the line AA shown in FIG.

Here, in the cable 2 for which the coating is peeled off using the cable coating stripping tool 1, for example, as shown in FIG. It can be coated with a semi-conductive tape) and a vinyl sheath 2d. Further, the outer diameter (diameter) of the cable 2 can be, for example, 9.4 mm to 31 mm, but is not limited to this. In the following description, the vinyl sheath 2d, the annealed copper tape 2c, and the like are peeled off in advance with an electric knife or the like to expose the insulator 2b, and then the insulation 2b as a coating is peeled off using the cable coating peeling tool 1. An example will be given to explain how to make the device.

As shown in FIGS. 1 to 3, the cable coating stripping tool 1 has a hollow main body portion 10, a cutter 20 as a cutting means attached to the main body portion 10, and a tubular shape arranged on the outer peripheral side of the main body portion 10. It is provided with a grip portion 30 of.

The main body 10 has an insertion port 11a for the cable 2 at one end (front end) in the axial direction. The main body 10 includes a front tubular portion 11 having an insertion port 11a, a large diameter tubular portion 12 having an outer diameter larger than that of the front tubular portion 11, and a shaft tubular portion 13 covered with a grip portion 30 (see FIG. 3). ) And. A discharge port 12a for discharging the peeled insulator 2b is formed in the large-diameter tubular portion 12, and the discharge port 12a communicates with the internal space S of the main body portion 10. Further, a rear cover 40 is fixed to the rear end of the main body 10 by a screw or the like.

Here, the internal space S of the main body 10 is connected to the large-diameter first space S1 into which the lead wire 2a covered with the insulator 2b can be inserted and the first space S1, and the lead wire in a state where the insulator 2b is peeled off. It has a second space S2 having a small diameter into which 2a can be inserted. A regulation wall 10a for restricting the cutting width of the insulator 2b is provided between the first space S1 and the second space S2. The regulation wall 10a is a surface on which the tip of the insulator 2b is pressed, and the distance between the regulation wall 10a and the cutting edge portion 21 described later in the axial direction is the cutting width of the insulator 2b. The diameter of the internal space S, that is, the inner diameter of the main body 10, is preferably a size corresponding to the outer diameter of the cable 2. Specifically, it is preferable that the diameter of the first space S1 corresponds to the outer diameter of the insulator 2b, and the diameter of the second space S2 corresponds to the outer diameter of the lead wire 2a. In addition, a tubular attachment or the like that can be attached to and detached from the front tubular portion 11 of the main body portion 10 may be attached so as to correspond to a type of cable having a diameter smaller than the inner diameter of the main body portion 10.

As shown in FIG. 4B, the cutter 20 is formed in a substantially L shape having a cutting edge portion 21 and a scooping edge portion 22, and a through hole 23 for passing the screw 24 is formed. The cutter 20 can be formed by, for example, metal powder injection molding (MIM), cutting, or the like. The cutter 20 is detachably fixed to a cutter accommodating portion 12b (see FIG. 5) provided adjacent to the discharge port 12a of the main body portion 10 by a screw 24. The cutter 20 is arranged so that the cutting edge 21a of the cutting edge portion 21 and the cutting edge 22a of the scooping blade portion 22 project into the internal space S, and the cutting edge portion 21 is located on the insertion port 11a side (front).

When the insulator 2b of the cable 2 is peeled off from the lead wire 2a, the insulator 2b is spirally cut from the end face in the axial direction by the cutting edge portion 21, and the cut portion (cutting) of the insulator 2b by the scooping blade portion 22. Peel off the waste) so as to scoop it up from the lead wire 2a. As a result, the chips that are spirally cut and peeled off are discharged from the discharge port 12a.

Here, the cutting edge 21a of the cutting edge portion 21 is preferably sharply processed in order to facilitate cutting of the coating, while the cutting edge 22a of the scooping blade portion 22 is preferably provided with an appropriate thickness. With such a configuration, the effect of peeling the cut insulator 2b from the lead wire 2a and lifting it can be enhanced, and the strength of the cutting edge 22a can also be enhanced. More preferably, the thickness of the cutting edge 22a of the scooping blade portion 22 is preferably about 0.1 mm.

The grip portion 30 is rotatable with respect to the main body portion 10 and is movable in the axial direction between the large diameter tubular portion 12 and the rear cover 40. Further, the grip portion 30 is urged forward by a first coil spring 31 arranged on the inner peripheral side of the grip portion 30. One end (front end) of the first coil spring 31 in the axial direction engages with the engaging convex portion 32 provided on the inner peripheral surface of the grip portion 30, and the other end (rear end) engages with the rear cover 40. ing.

A ratchet mechanism 50 that regulates the rotation direction of the grip portion 30 with respect to the main body portion 10 to one side is provided between the main body portion 10 and the grip portion 30. In this example, the ratchet mechanism 50 regulates the rotation direction of the grip portion 30 with respect to the main body portion 10 only in the direction opposite to the cutting direction. In the present embodiment, the ratchet mechanism 50 is composed of a pair of crown gear portions that engage in the axial direction along the rotation axis of the grip portion 30, and specifically, the first gear member on the main body portion 10 side. It has a structure of 51 and a second gear member 52 on the grip portion 30 side. In the present embodiment, the first gear member 51 is formed as a separate member from the main body portion 10, but it may be integrally formed with the main body portion 10, and similarly, the second gear member 52 is also gripped. It may be formed integrally with the portion 30.

As shown in FIG. 5, in the present embodiment, the first gear member 51 has an octagonal tubular shape. In this example, the first gear member 51 has a shape in which the contour lines of the inner peripheral surface and the outer peripheral surface are regular octagons when viewed from the axial direction. Then, the inner peripheral surface of the first gear member 51 fits into the fitting convex portion 14 provided on the main body portion 10, so that the first gear member 51 rotates together with the main body portion 10. The outer peripheral surface of the fitting convex portion 14 has a shape corresponding to the inner peripheral surface of the first gear member 51. That is, in this example, the contour line of the outer peripheral surface is configured to be octagonal when viewed from the axial direction. Here, the first gear member 51 is not limited to an octagonal tubular shape, and if it has a shape that fits on the outer peripheral surface of the main body portion 10 and rotates integrally with the main body portion 10, for example, another polygonal tubular shape. It is also possible to have a shape such as an elliptical cylinder or an elliptical cylinder.

When the first gear member 51 has, for example, a polygonal cylinder having more corners than octagons, the larger the number of corners, the larger the respective angles, and the shape becomes closer to a circle. The mating holding force between them becomes weak, and there is a risk of idling. Further, when the first gear member 51 has a polygonal tubular shape having a smaller angle than the octagon, the outer diameter of the first gear member 51 becomes large, so that the entire cable coating peeling tool 1 also becomes large. .. From this point of view, it is desirable that the first gear member 51 has an octagonal tubular shape as in this example.

The second gear member 52 is configured to fit into an octagonal fitting recess 33 (see FIG. 3) provided on the inner peripheral surface of the grip portion 30 and rotate together with the grip portion 30. In the present embodiment, the second gear member 52 has the same shape as the first gear member 51, and the blade portions are arranged to face each other so as to engage with each other in the axial direction. Since the first gear member 51 and the second gear member 52 of the present embodiment can be formed by cutting one octagonal cylinder, molding is easy.

The grip portion 30 has a large diameter region 30a on the front side, and a first gear member 51 and a second gear member 52 are arranged inside the large diameter region 30a. Further, the front end side region 30b of the grip portion 30 is arranged so as to overlap the step portion 15 provided in the large diameter tubular portion 12 of the main body portion 10, and the grip portion 30 moves to the rear side with respect to the main body portion 10. However, the ratchet mechanism 50 (first gear member 51, second gear member 52) is configured so as not to be exposed.

When peeling the insulator 2b from the cable 2, first, the cable 2 is gripped by one hand, the grip portion 30 is gripped by the other hand, and the cable 2 is inserted into the insertion port 11a. Then, when the grip portion 30 is rotated in the cutting direction while pressing the main body portion 10 against the cable 2 in the axial direction, the ratchet mechanism 50 causes the main body portion 10 together with the grip portion 30 to press against the cable 2. Rotate. As a result, the insulating body 2b of the cable 2 is spirally cut by the cutting edge portion 21 of the cutter 20, and the scooping edge portion 22 is peeled off from the lead wire 2a. After rotating the grip portion 30 in the cutting direction to some extent, the grip portion 30 is rotated in the opposite direction (return direction) while the grip portion 30 is being gripped, so that the grip portion 10 is maintained in the position of the main body portion 10. Only the portion 30 can be rotated, and the grip portion 30 can be rotated again together with the main body portion 10 in the cutting direction while the grip portion 30 is being gripped. When the grip portion 30 is rotated in the return direction, the ratchet mechanism 50 does not mesh with each other, so that the main body portion 10 does not rotate and only the grip portion 30 rotates. When the grip portion 30 is rotated in the return direction, the grip portion 30 moves within a predetermined range in the axial direction each time the first gear member 51 gets over the second gear member 52, but the second gear member 52 Is urged forward by the first coil spring 31 together with the grip portion 30, so that the engagement relationship with the first gear member 51 can be maintained.

In the present embodiment, the cable coating stripping tool 1 is exposed to regulate the axial length for stripping the insulator 2b from the cable 2, that is, the exposed length L of the lead wire 2a (see FIG. 4A). The length controlling means 60 is provided.

As shown in FIG. 3, the exposure length regulating means 60 extends to the second space S2 in the main body 10 and protrudes from the opposite end of the insertion port 11a in the main body 10 to form a hole in the rear cover 40. A prismatic adjusting shaft portion 61 penetrating 40a and a locking mechanism 62 for fixing the adjusting shaft portion 61 at a predetermined position are provided. The locking mechanism 62 has an engaging plate 63 and a pushing plate 64, and the adjusting shaft portion 61 is arranged so as to penetrate them. The engagement plate 63 and the push plate 64 are arranged inside the rear cover 40 in a recess 16 formed at the rear end of the main body 10.

The adjusting shaft portion 61 is arranged along the central axis of the main body portion 10, and the tip of the lead wire 2a exposed by peeling off the insulator 2b comes into contact with the tip 61a of the adjusting shaft portion 61, so that the leading wire 2a can be further connected. The invasion can be suppressed. Thereby, the exposure length L of the lead wire 2a can be regulated.

It is preferable to provide a scale display on the side surface of the adjusting shaft portion 61 to indicate the exposed length L of the lead wire 2a. By aligning the scale display with the end face of the rear cover 40, the exposed length L of the lead wire 2a can be set to a desired dimension. At the rear end of the adjusting shaft portion 61, an operating portion 61b that is gripped when the adjusting shaft portion 61 is moved is provided.

As shown in FIGS. 6A and 6B, the engaging plate 63 has a rectangular through hole 63a through which the adjusting shaft portion 61 penetrates. Further, the engaging plate 63 has a first inclined portion 63b and a second inclined portion 63c bent at a predetermined angle in the same direction on both sides of the through hole 63a. The engagement plate 63 is arranged so as to be inclined with respect to a plane perpendicular to the adjusting shaft portion 61. That is, the engaging plate 63 is arranged obliquely with respect to the adjusting shaft portion 61. As a result, the facing edges of the through hole 63a in the engaging plate 63 are caught on the side surfaces of both sides of the adjusting shaft portion 61, and the movement of the adjusting shaft portion 61 in the axial direction can be restricted. The second inclined portion 63c of the engaging plate 63 is urged in the axial direction toward the front by the second coil spring 65.

The push-in plate 64 has a rectangular elongated hole 64a through which the adjusting shaft portion 61 penetrates. Further, on both sides of the elongated hole 64a of the push plate 64, a pressing portion 64b and a rising portion 64c that are bent substantially vertically in different directions are provided. The pressing portion 64b is exposed on the outer surface of the main body portion 10 on the rear side of the grip portion 30. Further, the pressing portion 64b is urged outward in the radial direction (direction away from the adjusting shaft portion 61) by the third coil spring 66.

In the initial state shown in FIG. 6A, the adjustment shaft portion 61 is restrained (locked) from moving in the axial direction by the lock mechanism 62. Specifically, the rising portion 64c of the pushing plate 64 abuts on the second inclined portion 63c of the engaging plate 63, and the second inclined portion 63c is urged to the rear side. As a result, the engaging plate 63 is hooked on the adjusting shaft portion 61 so as to sandwich the side surfaces of both sides of the adjusting shaft portion 61 at the edge portion of the through hole 63a, and the movement of the adjusting shaft portion 61 is restricted.

When moving the adjusting shaft portion 61 in the axial direction, the pressing portion 64b of the pushing plate 64 is pushed inward of the main body portion 10 as shown by an arrow in FIG. 6B. When the pushing plate 64 is pushed and moved, the rising portion 64c moves in a direction away from the second inclined portion 63c of the engaging plate 63. As a result, the engaging plate 63 is tilted so as to approach a plane perpendicular to the adjusting shaft portion 61 (so that the engaging plate 63 approaches parallel to the pushing plate 64), so that the engaging plate 63 engages with the adjusting shaft portion 61. The resultant force is weakened (the catch is eliminated), and the adjustment shaft portion 61 becomes movable. That is, as shown in FIG. 6B, by pushing the pressing portion 64b to release the lock mechanism 62, the operating portion 61b can be pulled out or pushed in the axial direction to adjust the position. When the pressing portion 64b is released from being pushed in, the third coil spring 66 returns to the initial state and the adjusting shaft portion 61 is locked again. The first inclined portion 63b side of the engaging plate 63 is restricted from moving to the rear side by a pin 67 fixed to the main body portion 10. Further, near the tip of the adjusting shaft portion 61, a retaining metal fitting 68 is provided to prevent the adjusting shaft portion 61 from falling off when the adjusting shaft portion 61 is pulled backward.

The second coil spring 65 has a fixing portion 65a surrounding the adjusting shaft portion 61 and an elastic portion 65b connected to the fixing portion 65a. Then, the elastic portion 65b is arranged so as to come into contact with the second inclined portion 63c of the engaging plate 63. With such a configuration, when the pressing portion 64b of the pushing plate 64 is pushed, the second inclined portion 63c side of the engaging plate 63 can easily move toward the pushing plate 64, thereby engaging. The plate 63 can easily approach a plane perpendicular to the adjusting shaft portion 61. As a result, when the pressing portion 64b is pushed in, the engagement of the engaging plate 63 with the adjusting shaft portion 61 is easily released, and the lock mechanism 62 can function more reliably.

Here, it is desirable that the inclination angle θ (see FIG. 2) of the cutting edge portion 21 with respect to the plane perpendicular to the central axis of the main body portion 10 is 5 ° to 13 °. The angle θ is preferably set according to the diameter of the cable. Basically, the larger the diameter of the cable, the larger the angle θ. With such a configuration, when the grip portion 30 is rotated in the return direction, it is possible to more reliably suppress the main body portion 10 from rotating in the return direction together with the grip portion 30.

As a configuration for more reliably preventing the main body portion 10 from rotating in the return direction together with the grip portion 30 when the grip portion 30 is rotated in the return direction, for example, the cutting edge portion 21 or the scooping blade The blade surface of the portion 22 may be provided with a so-called “return” that protrudes in the direction opposite to the cutting edge 21a of the cutting edge portion 21 or the cutting edge 22a of the scooping blade portion 22. According to this, when the main body portion 10 tries to rotate in the reverse direction, the barb is caught by the insulator 2b, so that the grip portion 30 alone can be rotated in the return direction without rotating in the reverse direction.

As described above, the cable coating peeling tool 1 according to the present embodiment includes a ratchet mechanism 50 that regulates the rotation direction in one direction between the main body portion 10 and the grip portion 30. As a result, after rotating the grip portion 30 together with the main body portion 10 to some extent, only the grip portion 30 is rotated in the return direction while the grip portion 30 is being gripped, and the grip portion 30 is rotated together with the main body portion 10 again. The insulator 2b can be peeled off.

Therefore, according to the cable coating peeling tool 1 according to the present embodiment, it is not necessary to take the hand off the main body 10 each time the main body 10 is turned to some extent, and the insulator 2b is held while the grip 30 is held. Can be continuously peeled off. Therefore, the efficiency of the peeling work can be improved. In addition, the work can be performed more safely than when the insulator 2b is peeled off only by a cutter or an electric knife.

Further, according to the cable coating stripping tool 1 according to the present embodiment, since it is a hand-cranked type, even if the cutter 20 comes into contact with the lead wire 2a while stripping the coating, it can be grasped by the touch of the hand. Since it can be done, the peeling work can be interrupted immediately. Therefore, it is possible to prevent the lead wire 2a from being damaged by the contact of the cutter 20 and the blade of the cutter 20 from being chipped.

Further, in the cable coating stripping tool 1 according to the present embodiment, since the ratchet mechanism 50 is composed of a pair of crown gear portions that engage in the axial direction, it is compared with the ratchet mechanism having a configuration that meshes in the radial direction. Therefore, the outer diameter can be reduced. As a result, it is possible to avoid increasing the size of the grip portion 30.

Further, in the cable coating stripping tool 1 according to the present embodiment, the locking mechanism 62 of the adjusting shaft portion 61 can be released by pushing the pressing portion 64b exposed on the outer surface of the main body portion 10, so that the lead wire 2a The exposure length L of the above can be easily adjusted.

Although described above based on the illustrated examples, the present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. For example, the above-described embodiment. In the above, the cable coating peeling tool 1 is a hand-cranked type that is manually rotated, but may be configured to be used by connecting to a rotating tool such as an electric drill or a shock hammer, for example. In that case, the rear end portion of the adjustment shaft portion 61 protruding from the rear cover 40 is formed in a bit shape that can be directly attached to the power tool, or the rear end portion of the adjustment shaft portion 61 is provided with a connector or the like. The bit can be connected to the power tool and used by attaching the bit to the power tool. Further, the cable coating stripping tool of the present invention can be used for various cables provided with a coating around the conducting wire, and may be configured to strip the insulator, vinyl sheath and the like together.

1 Cable coating stripping tool 2 Cable 2a Conductor 2b Insulator (coating)
2c Annealed copper tape 2d Vinyl sheath 10 Main body 10a Regulation wall 11 Front cylinder 11a Insertion port 12 Large diameter cylinder 12a Discharge port 12b Cutter housing 13 Shaft cylinder 14 Fitting convex 15 Step 16 Concave 20 Cutter (cutting means)
21 Cutting edge part 22 Scooping edge part 23 Through hole 24 Screw 30 Grip part 31 First coil spring 32 Engagement convex part 33 Fitting concave part 40 Rear cover 50 Ratchet mechanism 51 First gear member 52 Second gear member 60 Exposed length Control means 61 Adjustment shaft 62 Lock mechanism 63 Engagement plate 64 Push-in plate 65 2nd coil spring 66 3rd coil spring 67 Pin 68 Retaining metal fittings L Exposed length S Internal space S1 1st space S2 2nd space

Claims (2)

A hollow body with an insertion slot for inserting a cable with a coating around the wire, and
The cutting means attached to the main body and
A tubular grip portion rotatably arranged on the outer peripheral side of the main body portion is provided.
By rotating the main body with respect to the cable with the cable inserted into the insertion port, the coating is spirally cut by the cutting means and separated from the lead wire.
A ratchet mechanism that regulates the rotation direction of the grip portion with respect to the main body portion in one direction is provided between the main body portion and the grip portion .
The main body is provided with an exposure length regulating means for regulating the exposure length of the lead wire.
The exposed length regulating means includes an adjusting shaft portion that extends into the main body portion and projects from the opposite end of the insertion port, and a locking mechanism that fixes the adjusting shaft portion at a predetermined position.
The lock mechanism has an engaging plate having a through hole for penetrating the adjusting shaft portion and engaging with the side surface of the adjusting shaft portion, and a pressing portion exposed on the outer surface of the main body portion, and the engaging plate has an engaging plate. With a push-in plate placed adjacent to it,
A cable coating stripping tool, characterized in that, by pushing in the pressing portion, the engaging force of the engaging plate with respect to the adjusting shaft portion is weakened so that the adjusting shaft portion can be moved . The cable coating stripping tool according to claim 1, wherein the ratchet mechanism includes a pair of crown gear portions that engage in an axial direction along the rotation axis of the grip portion.

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