JP7029699B2 - Attachments and work tools - Google Patents

Description

The present disclosure relates to an attachment and a work tool, and more particularly to an attachment attached to a tool body having a linearly moving portion and a work tool having the attachment.

As a conventional example, the electric crimping tool (working tool) described in Patent Document 1 will be illustrated. In the electric crimping tool described in Patent Document 1, a linear hydraulic pump is driven by a rotational force transmitted from an electric motor via a transmission mechanism. The hydraulic pump sends the oil in the oil tank to the tool cylinder by the reciprocating motion of the plunger. The hydraulic pressure generated in the tool cylinder causes the tool head to advance linearly and crimping work is performed.

Japanese Unexamined Patent Publication No. 2010-208018

However, it was not possible to cut the coating of the electric wire in the configuration of linearly advancing like the tool head (linear motion portion) of the electric crimping tool described in Patent Document 1.

It is an object of the present disclosure to provide an attachment capable of cutting a coating of an electric wire in a tool body provided with a linearly moving portion, and a work tool provided with the attachment.

In order to solve the above problems, the attachment according to one aspect of the present disclosure is attached to the tool body. The tool body includes a base portion and a linear motion portion. The linear motion portion directly moves with respect to the base portion. The attachment includes a rotary blade and a conversion mechanism. The rotary blade cuts the coating of the electric wire by rotating relative to the electric wire. The rotary blade is attached to the conversion mechanism. The conversion mechanism converts the force of the linear motion portion into a force of rotating the rotary blade relative to the electric wire.

The work tool according to one aspect of the present disclosure includes the attachment and the tool body. The tool body has a mounting structure to which the attachment is mounted.

The attachment and work tool according to one aspect of the present disclosure make it possible to cut the coating of an electric wire in a tool body provided with a linearly moving portion.

FIG. 1 is a front view of the work tool according to the first embodiment. FIG. 2A is a front view of a main part of the work tool of the same as above, and is a diagram showing a state before the linearly moving part directly moves. FIG. 2B is a front view of a main part of the work tool of the same as above, and is a diagram showing a state after the linearly moving part moves linearly. FIG. 3A is a side view of the work tool of the same as above, with a part thereof as a cross section, and is a view showing a state before the linear motion portion moves linearly. FIG. 3B is a side view of the work tool of the same as above, with a part thereof as a cross section, and is a view showing a state after the linear motion portion moves linearly. FIG. 4A is an explanatory diagram showing a state before the coating of the electric wire is cut by the same work tool. FIG. 4B is an explanatory diagram showing a state in which the coating of the electric wire is being cut by the same work tool. FIG. 5 is a side view of the work tool according to the first modification of the first embodiment. FIG. 6A is a side view of the work tool according to the second modification of the first embodiment. FIG. 6B is a cross-sectional view taken along the line X1-X1 of FIG. 6A. FIG. 7A is a cross-sectional view of the main part of the work tool according to the second embodiment as viewed from the front, and is a view showing a state before the linearly moving part directly moves. FIG. 7B is a cross-sectional view of the main part of the same work tool as viewed from the front, and is a view showing a state after the linearly moving part moves linearly.

Hereinafter, the attachment and the work tool according to the embodiment will be described with reference to the drawings. However, each embodiment described below is only part of the various embodiments of the present disclosure. Each of the following embodiments can be variously modified according to the design and the like as long as the object of the present disclosure can be achieved. Further, each figure described in each of the following embodiments is a schematic view, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio. do not have.

(Embodiment 1)
As shown in FIG. 1, the work tool 1 of the present embodiment includes an attachment 6 and a tool body 2. FIG. 1 shows a state in which the attachment 6 is not attached to the tool body 2. As shown in FIG. 3A, the electric wire 100 has a core wire 110 and a coating 120 that covers the core wire 110. The type of the electric wire 100 is not particularly limited, and is, for example, a CV cable, a CVT cable, a VV cable, a cabtire cable, or a coaxial cable. The attachment 6 includes a rotary blade 61 for cutting the coating 120 of the electric wire 100.

As shown in FIG. 1, the tool body 2 includes a base portion 3 and a linear motion portion 21. The rotary blade 61 (see FIG. 3A) is driven by the linear motion of the linear motion unit 21. The direction in which the linear motion unit 21 moves linearly is referred to as a first direction D1. The tool body 2 further includes a housing 4, an operation unit 22, an electric motor M1, a hydraulic mechanism 5, and a plurality of (two in FIG. 1) detachable pins 24. A battery pack 25 is attached to the tool body 2.

The housing 4 includes a tubular portion 41, a grip portion 42, and a mounting portion 43. The grip portion 42 projects from the side surface 410 of the tubular portion 41. An operation unit 22 (trigger) is attached to the grip unit 42. An oil tank 51, which will be described later, is attached to the tubular portion 41. The axial direction of the tubular portion 41 is along the first direction D1. A base portion 3 is attached to one end of the tubular portion 41 in the first direction D1. The base portion 3 can rotate with respect to the tubular portion 41 by applying a force from the operator.

The base portion 3 includes a body portion 31 and a plurality of (four, but only two are shown in FIG. 1) arm portions 32. The body portion 31 is formed in a cylindrical shape. The axial direction of the body portion 31 is along the first direction D1. The four arm portions 32 project from the side of the body portion 31 opposite to the tubular portion 41 side in the first direction D1. Of the four arms 32, two arms 32 are aligned in the depth direction of the paper in FIG. 1 (second direction D2: see FIG. 3A), and the remaining two arms 32 are shown in FIG. They are arranged in the depth direction of the paper surface (second direction D2: see FIG. 3A). A through hole 320 is formed in each arm portion 32.

The linear motion portion 21 is housed in the body portion 31 of the base portion 3. The linear motion portion 21 is formed in a columnar shape, for example. When the linear moving portion 21 is driven by the hydraulic mechanism 5, at least a part of the linear moving portion 21 is formed from an opening 310 formed at the tip of the body portion 31 (the left end of the paper in FIG. 1) in the first direction D1. It projects out of the body 31.

The mounting portion 43 is connected to the tip of the grip portion 42 on the side opposite to the tubular portion 41 side. A battery pack 25 is attached to the mounting portion 43.

The electric motor M1 is housed in the tubular portion 41. When the operator pulls in the operation unit 22, the electric motor M1 rotates. When the operator stops the operation of pulling in the operation unit 22, the motor M1 is stopped.

The hydraulic mechanism 5 has an oil tank 51 in which oil is stored, a piston, and a cylinder. Further, the tool body 2 further includes a cam mechanism.

The electric motor M1 generates a force to pressurize the oil of the hydraulic mechanism 5. More specifically, the rotational force of the electric motor M1 is converted into a force for reciprocating the piston by the cam mechanism. When the piston reciprocates, the oil in the oil tank 51 is sent to the cylinder, and the oil in the cylinder is pressurized. Due to the hydraulic pressure in the cylinder, the linearly moving portion 21 moves linearly in the first direction D1 to the side opposite to the tubular portion 41 side (to the left of the paper in FIG. 1). As a result, at least a part of the linear motion portion 21 protrudes to the outside of the body portion 31.

The base portion 3 has a mounting structure ST1 to which the attachment 6 is mounted. The mounting structure ST1 includes two detachable pins 24 and four arm portions 32. Each detachable pin 24 is formed in a columnar shape. Each of the four through holes 320 in the four arm portions 32 is formed in a circular shape.

The attachment 6 includes a rotary blade 61 (see FIG. 3A) and a conversion mechanism 8. The attachment 6 further includes a plurality of (two in FIG. 1) attachment portions 7 and a connecting portion 72. A through hole 70 is formed in each mounting portion 7. The connecting portion 72 connects the two mounting portions 7.

One of the two through holes 70 of the attachment 6 is arranged so as to overlap the two through holes 320 of the four through holes 320 of the base portion 3. At this time, the mounting portion 7 in which the one through hole 70 of the two mounting portions 7 is formed is between the two arm portions 32 in which the two through holes 320 are formed among the four arm portions 32. Sandwiched. In this state, one of the two attachment / detachment pins 24, the attachment / detachment pin 24, is passed through the one through hole 70 of the attachment 6 and the two through holes 320 of the base portion 3 and fixed to the base portion 3. Will be done. For example, the convex portion protruding from the inner surface of one of the two through holes 320 of the base portion 3 is fitted into the concave portion formed in the one detachable pin 24, whereby the one detachable pin is fitted. 24 is fixed to the base portion 3. Similarly, the remaining one detachable pin 24 is also passed through the remaining one through hole 70 of the attachment 6 and the remaining two through holes 320 of the base portion 3 and fixed to the base portion 3. As a result, the attachment 6 is detachably attached to the tool body 2. 2A and 2B and 3A and 3B show a state in which the attachment 6 is attached to the tool body 2.

As shown in FIG. 2A, the conversion mechanism 8 of the attachment 6 has a rack 81 and a pinion 82. The conversion mechanism 8 converts the force of the linear motion unit 21 into a force of rotating the rotary blade 61.

In the rack 81, the length of the first direction D1 is longer than the length of the direction orthogonal to the first direction D1. The rack 81 has a plurality of teeth 811 arranged along the first direction D1. When the attachment 6 is attached to the tool body 2, the rack 81 is adjacent to the linear motion portion 21 in the first direction D1. Further, the rack 81 is connected to the linear motion unit 21. More specifically, the rack 81 is connected to the linear moving portion 21 by inserting the tip portion 812 of the rack 81 into the recess 211 formed in the linear moving portion 21. When the linear motion unit 21 is driven by the hydraulic mechanism 5 (see FIG. 1) and linearly moves in the first direction D1 so as to project out of the body portion 31, the rack 81 is first moved together with the linear motion unit 21. Move in the direction D1 of. FIG. 2A shows a state before the linear moving portion 21 is driven by the hydraulic mechanism 5, and FIG. 2B shows a state after the linear moving portion 21 is driven by the hydraulic mechanism 5.

The conversion mechanism 8 further includes a guide rail 83. The guide rail 83 is fixed to one of the two mounting portions 7. As a result, the position of the guide rail 83 with respect to the tool body 2 is fixed. By being guided by the guide rail 83, the rack 81 is restrained from moving in a direction other than the first direction D1. The rack 81 and the guide rail 83 are adjacent to the connecting portion 72 in the depth direction of the paper surface of FIG. 2A (second direction D2: see FIG. 3A).

The pinion 82 is a disk-shaped gear. The pinion 82 has a plurality of teeth 821 formed over the entire circumference of the outer peripheral edge of the pinion 82. The plurality of teeth 821 of the pinion 82 mesh with the plurality of teeth 811 of the rack 81. The rotating shaft 822 of the pinion 82 is fixed to the two mounting portions 7 via the connecting portion 72. As a result, the position of the rotary shaft 822 with respect to the tool body 2 is fixed.

As shown in FIG. 3A, the conversion mechanism 8 further includes a guide portion 84. The guide portion 84 is formed in a bottomed cylindrical shape concentric with the pinion 82. In FIGS. 3A and 3B, the guide portion 84, the rotary blade 61, and the electric wire 100 are shown in cross section. The guide portion 84 guides the electric wire 100 so that the axial direction of the electric wire 100 is along the second direction D2 (predetermined direction). More specifically, by inserting the electric wire 100 into the guide portion 84, the axial direction of the electric wire 100 is along the second direction D2.

The guide portion 84 is connected to the pinion 82. A rotary blade 61 is attached to the guide portion 84. The rotary blade 61 is provided so as to protrude from the inner side surface 841 of the guide portion 84. The rotary blade 61 is attached obliquely with respect to the axial direction (second direction D2) of the guide portion 84. The inner diameter of the guide portion 84 between the rotary blade 61 and the bottom surface 842 of the guide portion 84 of the guide portion 84 is the side opposite to the bottom surface 842 side of the guide portion 84 and the rotary blade 61 of the guide portion 84. It is smaller than the inner diameter of the guide portion 84 between the end (opening 843) and the guide portion 84.

When the linear motion unit 21 moves linearly in the first direction D1, the rack 81 moves in the first direction D1, thereby rotating the pinion 82. Then, the guide portion 84 and the rotary blade 61 rotate together with the pinion 82. The direction of the rotation axis of the rotary blade 61 is along the second direction D2. In FIGS. 2A and 2B, the direction of rotation of the rotary blade 61 is indicated by an arrow R1.

Next, with reference to FIGS. 3A and 3B, a procedure for cutting the coating 120 of the electric wire 100 using the work tool 1 will be described.

The electric wire 100 has a core wire 110 and a coating 120 that covers the core wire 110. The operator holds the electric wire 100, inserts the electric wire 100 into the guide portion 84, and applies a force in the direction in which the axial tip 130 of the electric wire 100 is directed toward the bottom surface 842 of the guide portion 84 (to the right of the paper surface in FIG. 3A). Add to wire 100. As a result, as shown in FIG. 3A, the tip 130 of the electric wire 100 is in a state of hitting the rotary blade 61. At this time, the rotary blade 61 contacts the coating 120 diagonally with respect to the axial direction of the electric wire 100 so that the portion closer to the electric wire 100 (left side in FIG. 3A) approaches the central axis A1 of the electric wire 100. Further, the operator holds the electric wire 100 so that the electric wire 100 does not rotate.

FIG. 3A shows a state before the linear motion unit 21 (see FIG. 1) is driven by the hydraulic mechanism 5. When the operator pulls in the operation unit 22 (see FIG. 1) and the linear motion unit 21 is driven by the hydraulic mechanism 5 (see FIG. 1) and moves linearly in the first direction D1, the rotary blade 61 rotates. More specifically, the rotary blade 61 rotates in the circumferential direction of the electric wire 100. When the rotary blade 61 rotates while the operator applies a force in the direction of the tip 130 of the electric wire 100 toward the bottom surface 842 of the guide portion 84 (to the right of the paper surface in FIG. 3A), the rotary blade 61 rotates due to the force. , The coating 120 of the electric wire 100 is cut. FIG. 4A shows the moving path 121 of the rotary blade 61 in the coating 120 by a alternate long and short dash line. In a state where the rotary blade 61 cannot move in the second direction D2, the rotary blade 61 rotates while making a cut in the coating 120 in an oblique direction with respect to the axial direction of the electric wire 100. Therefore, when the rotary blade 61 rotates, the electric wire 100 is pulled toward the bottom surface 842 of the guide portion 84 by the rotary blade 61. In this way, the rotary blade 61 widens the cut of the coating 120 while the electric wire 100 moves toward the bottom surface 842. That is, the rotary blade 61 rotates with respect to the electric wire 100 while the electric wire 100 moves in the axial direction (second direction D2) of the guide portion 84 with respect to the rotary blade 61. As a result, the rotary blade 61 spirally cuts the coating 120. As shown in FIG. 4B, the portion 122 of the coating 120 between the rotary blade 61 and the tip 130 of the wire 100 is separated from the core wire 110.

As shown in FIG. 3B, when the tip 130 of the electric wire 100 (core wire 110) hits the bottom surface 842 of the guide portion 84, the electric wire 100 does not move, so that the rotary blade 61 rotates around the core wire 110 in the circumferential direction of the core wire 110. Rotate. As a result, the portion 122 of the coating 120 between the rotary blade 61 and the tip 130 is cut from the remaining portion of the coating 120 and taken from the core wire 110.

The guide portion 84 has a through hole 844 formed over the inner side surface 841 and the outer side surface 845 of the guide portion 84. The portion 122 of the coating 120 on the tip 130 side of the rotary blade 61 is taken out of the guide portion 84 through the through hole 844.

In addition to the attachment 6 for cutting the coating 120 of the electric wire 100, the tool body 2 has an attachment for cutting the coating 120 of the electric wire 100 and the core wire 110 together, and a crimp terminal or a sleeve for crimping. Attachments may be attachable.

(Modification 1 of Embodiment 1)
Next, the attachment 6A according to the first modification of the first embodiment and the work tool 1A provided with the attachment 6A will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The attachment 6A includes a chuck 63 instead of the guide portion 84. The chuck 63 is fixed to two mounting portions 7. More specifically, the chuck 63 is connected to the two mounting portions 7 via a predetermined member. The chuck 63 holds the electric wire 100. The rotary blade 61 is attached to the pinion 82. The chuck 63 sandwiches and holds the electric wire 100 in a state where the rotary blade 61 is inserted into the coating 120 of the electric wire 100. At this time, the tip 130 of the electric wire 100 faces the rotating shaft 822 (see FIG. 2A) of the pinion 82.

In the work tool 1A, the coating 120 of the electric wire 100 is cut by rotating the rotary blade 61 together with the pinion 82 while the electric wire 100 is held by the chuck 63. More specifically, the rotary blade 61 makes a circular cut in the coating 120 while making one round around the core wire 110 along the circumferential direction of the electric wire 100. After that, the operator removes the electric wire 100 from the chuck 63 and pulls the coating 120 from the tip 130 side of the electric wire 100, so that the portion of the coating 120 between the cut and the tip 130 can be taken from the core wire 110.

(Modification 2 of Embodiment 1)
Next, the attachment 6B according to the second modification of the first embodiment and the work tool 1B provided with the attachment 6B will be described with reference to FIGS. 6A and 6B. The same components as those of the first modification of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The rotary blade 61B of the attachment 6B is formed in a longer shape as compared with the rotary blade 61 of the first modification of the first embodiment. The electric wire 100 is arranged and held by the chuck 63 so that the longitudinal direction of the electric wire 100 is along the longitudinal direction of the rotary blade 61B. Of the rotary blade 61B, the length of the contact portion with the electric wire 100 is the same as the length L1 in the longitudinal direction of the rotary blade 61.

When the rotary blade 61B rotates together with the pinion 82, the rotary blade 61B cuts the coating 120 of the electric wire 100 by the same length as the length L1 in the longitudinal direction of the rotary blade 61B. As a result, the coating 120 around the core wire 110 can be removed from the core wire 110 at the portion near the tip 130 of the electric wire 100. In FIG. 6B, the direction of rotation of the rotary blade 61B is indicated by an arrow R1.

(Other Modifications of Embodiment 1)
Next, other modifications of the first embodiment are listed. The following modifications may be realized by appropriately combining them, or may be realized by appropriately combining them with the modifications 1 or 2 of the first embodiment.

The attachment 6 may include a mechanism for changing the direction of the rotation axis of the rotary blade 61. The mechanism is realized, for example, by one or more umbrella teeth. By the mechanism, for example, the direction of the rotation axis of the rotary blade 61 may be changed so that the direction of the rotation axis of the rotary blade 61 is along the direction in which the linear motion portion 21 moves linearly.

Further, the attachment 6 may be configured such that the electric wire 100 rotates instead of the rotary blade 61 rotating.

Further, in the tool body 2, the power of the electric motor M1 for linearly moving the linear motion unit 21 does not have to pressurize the oil of the hydraulic mechanism 5. The power of the electric motor M1 may be converted into a linear force and act so as to directly move the linear motion unit 21.

Further, in the tool body 2, the power for linearly moving the linear motion unit 21 is not limited to being generated by the electric motor M1. For example, the power for linearly moving the linear motion unit 21 may be generated by pneumatic pressure, or the power generated by the pneumatic pressure pressurizes the oil of the hydraulic mechanism 5, and the linear motion unit 21 is directly driven by hydraulic pressure. It may be moved. Further, the power generated by the operator pulling in the operation unit 22 may pressurize the oil of the hydraulic mechanism 5, and the linear motion unit 21 may be driven by the hydraulic pressure. Further, a linear motor may be used instead of the rotating electric motor M1.

Further, the attachment 6 may include a mechanism for applying a force for moving the electric wire 100 toward the bottom surface 842 of the guide portion 84 to the electric wire 100. For example, a part of the force generated by the hydraulic mechanism 5 acts to move the electric wire 100 toward the bottom surface 842 of the guide portion 84, and another part acts to move the linear moving portion 21 linearly. You may.

(Summary of Embodiment 1 and modified examples of Embodiment 1)
As described above, the attachment 6 (or 6A, 6B) according to the first aspect is attached to the tool body 2. The tool body 2 includes a base portion 3 and a linear motion portion 21. The linear motion unit 21 moves linearly with respect to the base unit 3. The attachment 6 (or 6A, 6B) includes a rotary blade 61 (or 61B) and a conversion mechanism 8. The rotary blade 61 (or 61B) cuts the coating 120 of the electric wire 100 by rotating relative to the electric wire 100. A rotary blade 61 (or 61B) is attached to the conversion mechanism 8. The conversion mechanism 8 converts the force of the linear motion unit 21 into a force of rotating the rotary blade 61 (or 61B) relative to the electric wire 100.

According to the above configuration, even the tool body 2 provided with the linearly moving portion 21 can cut the coating 120 of the electric wire 100 by attaching the attachment 6 (or 6A, 6B). Further, the operator can perform work other than cutting the attachment 6 (or 6A, 6B) and the coating 120 of the electric wire 100 attached to the tool body 2 (for example, crimping a crimp terminal or a sleeve). It may be used in combination with an attachment. As a result, the operator can perform the work of cutting the coating 120 of the electric wire 100 and the operation other than cutting the coating 120 of the electric wire 100 with one tool main body 2.

Further, in the attachment 6 (or 6A, 6B) according to the second aspect, in the first aspect, the tool body 2 further includes a hydraulic mechanism 5. The hydraulic mechanism 5 linearly moves the linear motion unit 21 by hydraulic pressure.

According to the above configuration, the force for pressurizing the oil of the hydraulic mechanism 5 can be changed to a larger force of the hydraulic pressure to directly move the linear motion unit 21.

Further, in the attachment 6 (or 6A, 6B) according to the third aspect, in the second aspect, the tool body 2 further includes an electric motor M1. The electric motor M1 generates a force to pressurize the oil of the hydraulic mechanism 5.

According to the above configuration, in the tool body 2, the force for pressurizing the oil of the hydraulic mechanism 5 can be easily obtained from the electric motor M1.

Further, the attachment 6 according to the fourth aspect further includes a guide portion 84 in any one of the first to third aspects. The guide portion 84 guides the electric wire 100 so that the axial direction of the electric wire 100 is along a predetermined direction (second direction D2). When the electric wire 100 is guided by the guide portion 84, the rotary blade 61 is in the axial direction of the electric wire 100 so that the portion closer to the electric wire 100 is closer to the central axis A1 of the electric wire 100 at the tip 130 in the axial direction of the electric wire 100. By contacting the coating 120 diagonally with respect to the wire 100 and rotating in the circumferential direction of the electric wire 100 relative to the electric wire 100, a cut is made in the coating 120.

According to the above configuration, the rotary blade 61 contacts the coating 120 at the tip 130 of the electric wire 100 and rotates relative to the electric wire 100 to make a cut in the coating 120, so that the coating after the cut is made. A part (part 122) of 120 becomes a band shape. Therefore, it is easy to remove a part of the coating 120 after the cut is made.

Further, in the attachment 6 (or 6A, 6B) according to the fifth aspect, in any one of the first to fourth aspects, the direction of the rotation axis of the rotary blade 61 (or 61B) is such that the linear motion portion 21 is used. It is along the direction of linear movement.

According to the above configuration, the operator sees the linear moving portion 21 moving linearly and the rotary blade 61 (or 61B) rotating when viewed from a direction orthogonal to the direction in which the linear moving portion 21 moves linearly. Easy to see both.

Further, the work tool 1 (or 1A, 1B) according to the sixth aspect includes the attachment 6 (or 6A, 6B) according to any one of the first to fifth aspects, and the tool body 2. The tool body 2 has a mounting structure ST1 to which the attachment 6 (or 6A, 6B) is mounted.

According to the above configuration, the operator can perform the work of cutting the coating 120 of the electric wire 100 and the operation other than cutting the coating 120 of the electric wire 100 with one tool main body 2.

The configurations according to the second to fifth aspects are not essential configurations for the attachment 6 (or 6A, 6B) and can be omitted as appropriate.

(Embodiment 2)
Next, the attachment 6C according to the second embodiment and the work tool 1C provided with the attachment 6C will be described with reference to FIGS. 7A and 7B. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 7A, the conversion mechanism 8C of the attachment 6C has a ball screw 87 and a bearing 85. The conversion mechanism 8C converts the force of the linear motion unit 21 into the force of rotating the rotary blade 61.

The ball screw 87 is formed in a columnar shape along the first direction D1. A threaded portion 871 including a thread groove and a thread thread is formed on the side surface of the ball screw 87. When the attachment 6C is attached to the tool body 2, the ball screw 87 is adjacent to the linear motion portion 21 in the first direction D1. Further, the ball screw 87 is connected to the linear motion portion 21. More specifically, the ball screw 87 is connected to the linear motion portion 21 by inserting the tip portion 872 of the ball screw 87 into the recess 211 formed in the linear motion portion 21. When the linear motion unit 21 is driven by the hydraulic mechanism 5 (see FIG. 1) and linearly moves in the first direction D1 so as to project out of the body portion 31, the ball screw 87 is moved together with the linear motion unit 21. Move in the direction D1 of 1.

The bearing 85 is formed in a cylindrical shape along the first direction D1. A threaded portion 851 including a thread groove and a thread thread is formed on the inner surface of the bearing 85. A ball screw 87 is passed through the inside of the bearing 85. The threaded portion 851 of the bearing 85 meshes with the threaded portion 871 of the ball screw 87.

The conversion mechanism 8C further includes a guide unit 86. The guide portion 86 is formed in a bottomed cylindrical shape concentric with the bearing 85. The guide portion 86 guides the electric wire 100 so that the axial direction of the electric wire 100 is along the first direction D1 (predetermined direction). More specifically, by inserting the electric wire 100 into the guide portion 86, the axial direction of the electric wire 100 is along the first direction D1.

The guide portion 86 is connected to the bearing 85. A rotary blade 61 is attached to the guide portion 86. The rotary blade 61 is provided so as to protrude from the inner side surface 861 of the guide portion 86. The rotary blade 61 is attached obliquely with respect to the axial direction of the guide portion 86. The inner diameter of the guide portion 86 between the rotary blade 61 and the bottom surface 862 of the guide portion 86 is the side opposite to the rotary blade 61 and the bottom surface 862 side of the guide portion 86. It is smaller than the inner diameter of the guide portion 86 between the end (opening 863) and the guide portion 86.

Each of the two mounting portions 7C has two convex portions 71. Two circular grooves 852 are formed on the outer surface of the bearing 85 along the circumferential direction of the bearing 85. The two convex portions 71 of each mounting portion 7C are fitted into the two grooves 852. As a result, the bearing 85 is restricted from moving in the first direction D1. Further, the bearing 85 can rotate in the circumferential direction of the bearing 85 with respect to the two mounting portions 7C. More specifically, the bearing 85 is rotatable in the circumferential direction of the bearing 85 so that the inner surfaces of the two grooves 852 slide with respect to each convex portion 71. When the bearing 85 rotates, the guide portion 86 and the rotary blade 61 also rotate together. The direction of the rotation axis of the rotary blade 61 is along the direction in which the linear motion portion 21 moves linearly (first direction D1).

The two mounting portions 7C are connected via a bearing 85. Therefore, the attachment 6C does not include the connecting portion 72 (see FIG. 3A).

When the linear motion portion 21 is driven by the hydraulic mechanism 5 and linearly moves in the first direction D1, the ball screw 87 moves in the first direction D1. At this time, the bearing 85 cannot move in the first direction D1. Therefore, the bearing 85 rotates with respect to the ball screw 87 and the two mounting portions 7C while the threaded portion 871 of the ball screw 87 and the threaded portion 851 of the bearing 85 mesh with each other. Then, the guide portion 86 and the rotary blade 61 rotate together with the bearing 85.

Next, a procedure for cutting the coating 120 of the electric wire 100 using the work tool 1C will be described.

The operator holds the electric wire 100, inserts the electric wire 100 inside the guide portion 86, and applies a force in the direction in which the tip 130 of the electric wire 100 toward the bottom surface 862 of the guide portion 86 (to the right of the paper surface in FIG. 7A) to the electric wire 100. Add. As a result, as shown in FIG. 7A, the tip 130 of the electric wire 100 is in a state of hitting the rotary blade 61. At this time, the rotary blade 61 contacts the coating 120 diagonally with respect to the axial direction of the electric wire 100 so that the portion closer to the electric wire 100 (left side in FIG. 7A) approaches the central axis A1 of the electric wire 100. Further, the operator holds the electric wire 100 so that the electric wire 100 does not rotate.

FIG. 7A shows a state before the linear motion unit 21 is driven by the hydraulic mechanism 5. When the operator pulls in the operation unit 22 (see FIG. 1) and the linear motion unit 21 is driven by the hydraulic mechanism 5 (see FIG. 1) and moves linearly in the first direction D1, the rotary blade 61 rotates. More specifically, the rotary blade 61 rotates in the circumferential direction of the electric wire 100. When the rotary blade 61 rotates while the operator applies a force in the direction of the tip 130 of the electric wire 100 toward the bottom surface 862 of the guide portion 86 (to the right of the paper surface in FIG. 7A), the rotary blade 61 rotates due to the force. , The coating 120 of the electric wire 100 is cut. Even after that, in a state where the rotary blade 61 cannot move in the first direction D1, the rotary blade 61 rotates while making a cut in the coating 120 in an oblique direction with respect to the axial direction of the electric wire 100. Therefore, when the rotary blade 61 rotates, the electric wire 100 is pulled toward the bottom surface 862 of the guide portion 86 by the rotary blade 61. In this way, the rotary blade 61 widens the cut of the coating 120 while the electric wire 100 moves toward the bottom surface 862. That is, the rotary blade 61 rotates with respect to the electric wire 100 while the electric wire 100 moves in the axial direction (first direction D1) of the guide portion 86 with respect to the rotary blade 61. As a result, the rotary blade 61 spirally cuts the coating 120.

As shown in FIG. 7B, when the tip 130 of the electric wire 100 (core wire 110) hits the bottom surface 862 of the guide portion 86, the electric wire 100 does not move, so that the rotary blade 61 rotates around the core wire 110 in the circumferential direction of the core wire 110. Rotate. As a result, the portion of the coating 120 between the rotary blade 61 and the tip 130 is cut from the remaining portion of the coating 120 and taken from the core wire 110.

The guide portion 86 has a through hole 864 formed over the inner side surface 861 and the outer side surface 865 of the guide portion 86. The portion of the coating 120 between the rotary blade 61 and the tip 130 is taken out of the guide portion 86 through the through hole 864.

Also in this embodiment, similarly to the first modification of the first embodiment, the rotary blade 61 cuts the coating 120 so as to rotate around the core wire 110 in the circumferential direction of the core wire 110 in a state where the electric wire 100 is fixed. You may.

Further, also in the present embodiment, the rotary blade 61 may be formed in a long shape as in the modified example 2 of the first embodiment. Further, the electric wire 100 may be arranged so that the longitudinal direction of the rotary blade 61 is along the longitudinal direction of the electric wire 100. In this case, when the rotary blade 61 rotates, the rotary blade 61 cuts the coating 120 of the electric wire 100 by the same length as the length in the longitudinal direction of the rotary blade 61.

Each of the above-described embodiments may be realized by appropriately combining them, including modifications.

1, 1A, 1B, 1C Work tool 2 Tool body 21 Linear part 3 Base part 5 Hydraulic mechanism 6, 6A, 6B, 6C Attachment 61, 61B Rotary blade 8, 8C Conversion mechanism 84, 86 Guide part 100 Wire 120 Coating 130 Tip A1 Central axis D1 First direction (predetermined direction)
D2 Second direction (predetermined direction)
M1 motor ST1 mounting structure

Claims (6)

An attachment attached to a tool body including a base portion and a linearly moving portion that moves directly with respect to the base portion.
A rotary blade that cuts the coating of the electric wire by rotating relative to the electric wire,
An attachment to which the rotary blade is attached and provided with a conversion mechanism for converting a force in which the linear moving portion directly moves into a force for rotating the rotary blade relative to the electric wire. The attachment according to claim 1, wherein the tool body further includes a hydraulic mechanism that linearly moves the linear moving portion by hydraulic pressure. The attachment according to claim 2, wherein the tool body further includes an electric motor that generates a force to pressurize the oil of the hydraulic mechanism. A guide portion for guiding the electric wire so that the axial direction of the electric wire is along a predetermined direction is further provided.
When the electric wire is guided by the guide portion, the rotary blade has the axial direction of the electric wire so that the portion closer to the electric wire is closer to the central axis of the electric wire at the tip in the axial direction of the electric wire. Any of claims 1 to 3, characterized in that the coating is cut diagonally with respect to the coating and rotated in the circumferential direction of the electric wire relative to the electric wire. The attachment described in item 1. The attachment according to any one of claims 1 to 4, wherein the direction of the rotation axis of the rotary blade is along the direction in which the linear motion portion moves linearly. The attachment according to any one of claims 1 to 5, and the attachment
A tool body having a mounting structure to which the attachment is mounted.
Work tools.

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