Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B25/00—Implements for fastening, connecting or tensioning of wire or strip
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
  • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
  • H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching

Definitions

• the present invention relates to a wire gripper and a wire tensioning device.
• Patent Document 1 discloses a wire gripper that can maintain a good grip even when a force is applied in the opposite direction to the tension, and also has a tension adjustment function.
• This wire gripper is equipped with a wedge portion consisting of upper and lower wedge pieces as a wire gripping mechanism.
• the wedge portion is held in the main body so as to surround the side surface in the thickness direction and the upper and lower inclined portions.
• the upper wedge piece has an inclined groove formed on the back side that slidably engages with an inclined ridge formed on the main body.
• the lower wedge piece is connected via a detachable guide portion that guides it in a direction opposite the upper wedge piece so that it can be detached and attached.
• the present invention aims to provide a wire gripper and wire tensioning device that are easy to operate.
• a wire gripper used to clamp a linear object.
• the wire gripper includes a gripping section, a displacement mechanism, and a motor.
• the gripping section has a first member and a second member.
• the first member has a tapered groove.
• the second member is disposed so as to abut against a portion of the groove, thereby forming a clamping space in the gap where they do not abut.
• the displacement mechanism is configured to displace the positional aspects of the first member and the second member, thereby changing the size of the clamping space.
• the positional aspects include a first aspect and a second aspect.
• the linear object is clamped by the gripping section.
• the clamping of the linear object by the gripping section is released, and the motor is configured to generate rotational power for powering the displacement mechanism.
• the wire gripper can be easily operated, allowing wire stringing work to be carried out quickly and safely.
• FIG. 2 is a front view showing the wire tensioning device 100 of the present embodiment.
• 2A and 2B are perspective views showing the configuration of the support 300a in FIG. 1 .
• 2A and 2B are perspective views showing the configuration of the support 300b in FIG. 1.
• FIG. 1 is a perspective view showing a wire gripper 1 of the present embodiment.
• FIG. 1 is a perspective view showing a wire gripper 1 of the present embodiment.
• 2 is an exploded perspective view showing the configuration of the wire gripping portion 2 and the displacement mechanism 3.
• FIG. 2 is an exploded perspective view showing the configuration of the wire gripping portion 2 and the wire type detection mechanism 6.
• FIG. FIG. 2 is an exploded perspective view showing the configuration of a motor 4 and a transmission mechanism 5.
• FIG. 2 is a left side view showing the configuration of the transmission mechanism 5.
• 2 is a block diagram showing the configuration of a control board 7.
• the program for realizing the software appearing in this embodiment may be provided as a non-transitory computer-readable recording medium, or may be provided so that it can be downloaded from an external server, or may be provided so that the program is started on an external computer and its functions are realized on a client terminal (so-called cloud computing).
• a "unit” can also include, for example, hardware resources implemented by a circuit in the broad sense, and software information processing that can be specifically realized by these hardware resources.
• this embodiment handles various types of information, which can be represented, for example, by physical values of signal values representing voltage and current, high and low signal values as a binary bit collection consisting of 0 or 1, or quantum superposition (so-called quantum bits), and communication and calculations can be performed on a circuit in the broad sense.
• a circuit in the broad sense is a circuit that is realized by at least appropriately combining a circuit, circuitry, a processor, and memory.
• ASICs application specific integrated circuits
• SPLDs simple programmable logic devices
• CPLDs complex programmable logic devices
• FPGAs field programmable gate arrays
• Fig. 1 is a front view showing the wire tensioning device 100 of this embodiment.
• Figs. 2 and 3 are perspective views showing the configuration of the support tool 300 in Fig. 1.
• the upper side in Figs. 1 to 3 (as well as Figs. 4 to 9) will be referred to as “upper” or “upper side” and the lower side as “lower” or “lower”.
• the right side will be referred to as "right” or “right side”
• the left side will be referred to as "left” or "left side”.
• the tensioning device 100 shown in FIG. 1 is used, for example, when cutting a covered electric wire, which is an example of a linear body Ln, while it is in an overhead state.
• the covered electric wire is indicated by a two-dot chain line.
• This wire tensioning device 100 is equipped with a pair of wire grippers 1 for clamping an insulated electric wire, which is an example of a linear body Ln, and a long stretcher 200 whose both ends are connected to the wire grippers 1 via connectors 400.
• the stretcher 200 is configured to expand and contract its longitudinal dimension by operating an operating unit 205 provided on the right side (the other side) of the stretcher 200 in the longitudinal direction.
• the extender 200 has a cylindrical main body 201 and a small-diameter cylindrical moving shaft 202 inserted into the main body 201 so as to be relatively movable in the longitudinal direction.
• the main body 201 is composed of a cylindrical part 203 made of aluminum or FRP (fiber reinforced plastic), for example, and a moving part 204 fixed to the end of the cylindrical part 203.
• the operating part 204 has a casing made of, for example, an aluminum alloy, and a gear transmission mechanism (not shown) housed within the casing, which is connected to an operating part 205 that protrudes from the underside of the casing and is rotated.
• the gear transmission mechanism is connected to a screw shaft that extends longitudinally within the cylindrical part 203, and a nut (not shown) provided at the end of the moving shaft part 202 on the main body cylindrical part 201 side is screwed onto this screw shaft.
• the moving shaft part 202 is formed, for example, from FRP.
• a remote control device (an indirect tool) is engaged with the operating part 205, and the operating part 205 is rotated by the remote control device.
• the moving shaft part 202 appears and disappears from the main cylindrical part 201, and the telescopic device 200 is configured to extend or retract.
• the end of the extender 200 on the side of the main body tube 201 and the end on the side of the moving shaft 202 are provided with fixing members 500 capable of engaging the connector 400.
• the tensioning device 100 also includes a pair of supports 300 (support 300a and support 300b) attached to the stretcher 200.
• the supports 300a and 300b each include a substantially C-shaped support body 302 with an opening 301 on one side, and a closing piece 303 that closes the opening 301 of the support body 302.
• a coated electric wire which is an example of a linear body Ln
• the opening 301 of the support body 302 is closed with the closing piece 303, so that the coated electric wire can be supported by the support 300.
• an engagement piece 306 is provided rotatably at the end of the support body 302 facing the opening 301, and engages with the closing piece 303 when the opening 301 is closed by the closing piece 303.
• the support 300a has a through hole 304 formed in the lower part of the support body 302, through which the extender 200 (moving shaft portion 202) is inserted.
• the support 300b has a through hole 305 formed in the lower part of the support body 302, through which the extender 200 (tubular portion 203) is inserted.
• the support 300b is provided with a fixing portion 307 at the bottom of the support body 302 for fixing the expander 200 at a desired longitudinal position or at a desired rotation angle around the axis. Furthermore, operation portions 308 and 309 for operating the fixing portion 307 by a remote control device are provided on both sides. With this support 300b, an operation (sorting operation) can be performed to change the direction of the end of the insulated electric wire on the right side after cutting so that the ends of the insulated electric wires do not come into contact with each other after cutting.
• Such a tensioning device 100 (or an expander 200 having a pair of wire grippers 1 at both ends) is used, for example, as follows: First, a pair of supports 300a, 300b are hooked onto the insulated electric wire. Next, a predetermined portion of the insulated electric wire is clamped with the wire gripper 1 on the right side, and a predetermined portion of the insulated electric wire is clamped with the wire gripper 1 on the left side. After that, the operating unit 205 is operated to contract the longitudinal dimension of the expander 200, and the pair of wire grippers 1 holding the insulated electric wire (an example of a linear body Ln) are brought closer together.
• the pair of wire grippers 1 holding the insulated electric wire an example of a linear body Ln
• the insulated electric wire is tensioned outside the wire grippers 1 of the insulated electric wire and relaxed in the portion of the insulated electric wire between the two wire grippers 1, and the relaxed portion of the insulated electric wire is cut with an indirect live wire cutting tool.
• the operating unit 205 can be operated to extend the longitudinal dimension of the expander 200 and separate the pair of wire grippers 1 that are holding the insulated electric wire (an example of a linear body Ln). According to this embodiment, the wire grippers 1 can be easily operated to perform wire tensioning work quickly and safely.
• Figures 4 and 5 are perspective views showing the wire gripper 1 of this embodiment.
• Figure 6 is an exploded perspective view showing the configurations of the wire gripping unit 2 and the displacement mechanism 3.
• Figure 7 is an exploded perspective view showing the configurations of the wire gripping unit 2 and the wire type detection mechanism 6.
• Figure 8 is an exploded perspective view showing the configurations of the motor 4 and the transmission mechanism 5.
• Figure 9 is a left side view showing the configuration of the transmission mechanism 5.
• the wire gripper 1 shown in FIG. 4 is a device used to grip the linear body Ln, and includes a wire gripping section 2, a displacement mechanism 3, a motor 4, a transmission mechanism 5, a wire type detection mechanism 6, a control board 7, and a power supply section 8.
• the gripping portion 2 has a first member 21, a second member 22, a third member 23, and a connecting member 24.
• the displacement mechanism 3 has a screw shaft 31 and a washer 32.
• the first member 21 is a block-shaped member having a tapered groove 21c and a through hole 21d.
• the groove 21c has a gripping surface 21a and an inclined surface 21b on the inner surface of the groove, and the gripping surface 21a and the inclined surface 21b are located opposite each other.
• the second member 22 is a block-shaped member having a gripping surface 22a, a sliding surface 22b, and a screw hole 22c.
• the second member 22 has the gripping surface 22a and the sliding surface 22b on the opposite surface.
• the first member 21 and the second member 22 are arranged so that the inclined surface 21b and the sliding surface 22b are in contact with each other.
• the second member 22 is arranged so that it is in contact with a part of the groove 21c of the first member 21.
• the gripping portion 2 has gripping surface 21a and gripping surface 22a at opposing positions, and thus, a clamping space CS for clamping the linear body Ln is formed by gripping surface 21a and gripping surface 22a.
• this configuration forms a clamping space CS in the gap where the first member 21 and the second member 22 are not in contact.
• the gripping surface 21a and the gripping surface 22a have a V-shaped groove for clamping the linear body Ln.
• the gripping surface 21a and the gripping surface 22a may have an arc-shaped groove or the like.
• the gripping surface 21a and the gripping surface 22a may be provided with an anti-slip means for the linear body Ln.
• Such anti-slip means may include the formation of a sharp minute convex portion, the formation of a minute convex ridge extending in the short direction, and the attachment of a rubber member.
• the first member 21 and the second member 22 are configured so that the size of the clamping space CS changes in response to a change in the positional state.
• the positional state has a first state and a second state.
• the first state is a positional state in which the size of the clamping space CS is narrowed, thereby enabling the linear body Ln to be clamped.
• the second state is a positional state in which the size of the clamping space CS is widened, thereby enabling the clamping of the linear body Ln to be released.
• the positional state is configured so that in the first state, the linear body Ln is clamped, and in the second state, the clamping of the linear body Ln is released.
• the first member 21 is fixed, and the second member 22 is configured to slide relative to the first member 21 and thereby displace along the longitudinal direction of the linear body Ln.
• the second member 22 is a block-shaped slider.
• the second member 22 has a wedge, prism, pyramid, or truncated pyramid shape.
• the linear body Ln can be more firmly clamped by the wedge effect, and the tensioning work can be performed quickly and safely.
• the first member 21 and the second member 22 are engaged with each other by a shape along the sliding direction.
• the shape along the sliding direction is, for example, a convex shape on one side and a concave shape on the other side.
• the gripping portion 2 may be configured to displace both the first member 21 and the second member 22, or may be configured to displace the first member 21 relative to the fixed second member 22.
• the fixed first member 21 has a through hole 21d
• the second member 22 that slides relative to the first member 21 has a screw hole 22c.
• the first member 21 may have a screw hole
• the second member 22 may have a through hole. That is, at least one of the first member 21 and the second member 22 has a screw hole (e.g., screw hole 22c).
• the through hole 21d and the screw hole 22c are provided at positions facing each other along the sliding direction of the second member 22.
• the sliding direction of the second member 22 is substantially the same as the longitudinal direction of the linear body Ln.
• the screw shaft 31 has a threaded portion 31a on one side in the longitudinal direction and a shaft portion 31c on the other side in the longitudinal direction.
• the screw shaft 31 also has a flange portion 31b between the threaded portion 31a and the shaft portion 31c.
• the shaft portion 31c (screw shaft 31) is inserted into the washer 32, and the flange portion 31b abuts against the washer 32.
• the shaft portion 31c is inserted into the through hole 21d (first member 21), and the timing pulley 53 of the transmission mechanism 5 is fitted into the portion protruding from the first member 21 (a part of the shaft portion 31c) (details regarding the transmission mechanism 5 will be described later).
• the screw shaft 31, which is the displacement mechanism 3 is rotatably attached to the through hole 21d (first member 21) with its axial displacement restricted.
• the screw portion 31a (screw shaft 31) is screwed into the screw hole 22c of the second member 22.
• the displacement mechanism 3 has a screw shaft 31 that screws into the screw hole 22c.
• the screw hole 22c part of the second member 22
• the through hole 21d part of the first member 21
• the displacement mechanism 3 is configured to be able to displace the second member 22 along the longitudinal direction of the linear body Ln while the first member 21 is fixed.
• the displacement mechanism 3 is configured to displace at least one of the first member 21 and the second member 22 in the longitudinal direction of the linear body Ln.
• the size of the clamping space CS also changes depending on the position of the second member 22 in the longitudinal direction of the linear body Ln. In other words, the size of the clamping space CS changes depending on the longitudinal position of at least one of the first member 21 and the second member 22.
• the displacement mechanism 3 displaces the second member 22 along the inclined surface 21b in the tapered groove 21c.
• the tapered shape of the groove 21c is composed of the gripping surface 21a and the inclined surface 21b arranged opposite to it.
• the gripping surface 21a is a surface that is provided along the longitudinal direction of the linear body Ln
• the inclined surface 21b is a surface that is provided opposite and inclined to the gripping surface 21a.
• the distance between the gripping surface 21a and the inclined surface 21b is close to each other on one side and far apart on the other side in the longitudinal direction of the linear body Ln.
• the displacement mechanism 3 can displace the positional state of the gripping portion 2 to the first state. Also, when the second member 22 is displaced toward the side where the gripping surface 21a and the inclined surface 21b are farther away from each other, the gripping surface 21a and the gripping surface 22a are farther away from each other, and the size of the clamping space CS can be widened. That is, the displacement mechanism 3 can displace the positional state of the gripping portion 2 to the second state. That is, the displacement mechanism 3 is configured to displace the positional state of the first member 21 and the second member 22, and the size of the clamping space CS changes.
• the third member 23 is composed of a narrow plate piece, and is rotatably attached to each of the first member 21 and the second member 22.
• the third member 23 is disposed adjacent to each of the first member 21 and the second member 22, and is thus disposed so as to be part of the clamping space CS.
• the displacement mechanism 3 is configured to displace the third member 23 in accordance with the displacement of the positional aspect of the gripping portion 2.
• the third member 23 is configured so that its position and posture are displaced in accordance with the displacement of the positional aspect of the first member 21 and the second member 22.
• the first mode is a positional mode in which the first member 21, the second member 22, and the third member 23 form a hole through which the linear body Ln can be inserted. This allows the linear body Ln to be retained in the clamping space CS.
• the second mode is a positional mode in which a gap is formed in the clamping space CS through which the linear body Ln can be inserted and removed. This allows the linear body Ln to be inserted and removed from the clamping space CS.
• a hole through which the linear body Ln can be inserted is formed in at least a part of the clamping space CS
• a gap is formed in the clamping space CS through which the linear body Ln can be inserted and removed. Details are explained below.
• the through hole 23a of the third member 23 is provided penetrating from the front surface 23d to the back surface 23e of the third member 23.
• the cylindrical portion 231b of the stepped bolt 231 is inserted into the through hole 23a, and the screw head 231c abuts against the front surface 23d.
• the screw portion 231a is inserted into the through hole 241c of the connection member 241 (part of the connection member 24), the through hole 21f of the first member 21, and the through hole 242c of the connection member 242 (part of the connection member 24), and a nut 245 is screwed into the part protruding from the through hole 242c.
• the details of the connection member 24 will be described later.
• the bolt 232 is inserted into the through hole 23b of the third member 23, and the bolt 232 is screwed into the screw hole 22d of the second member 22.
• the third member 23 is rotatably attached to both the first member 21 and the second member 22.
• the third member 23 is arranged so as to be close to the gripping surface 21a of the first member 21 and the gripping surface 22a of the second member 22, respectively.
• the third member 23 is arranged so as to form a part of the clamping space CS, and the first member 21, the second member 22, and the third member 23 form a hole through which the linear body Ln can be inserted.
• the third member 23 is displaced away from the first member 21, and a gap is formed in the clamping space CS through which the linear body Ln can be inserted and removed. That is, when the wire gripping section 2 is shifted from the second state to the first state, that is, when the linear body Ln that has not yet been clamped is inserted into the clamping space CS, the wire gripping section 2 is configured to hold the linear body Ln before clamping in the clamping space CS by the displacement of the third member 23. According to this configuration, the work of attaching the linear body Ln to the wire gripping device 1 becomes easier, and the wire tensioning work can be performed quickly and safely.
• the connecting member 24 is composed of a narrow plate piece, and includes connecting members 241 and 242.
• the connecting members 241 and 242 are attached so as to sandwich the first member 21, and the through hole 241a of the connecting member 241 and the through hole 242a of the connecting member 242 are overlapped to form the through hole 24a.
• a bolt 243 is inserted into the through hole 241b of the connecting member 241, and the screw head of the bolt 243 abuts against the through hole 241b.
• the bolt 243 is further inserted into the through hole 21e of the first member 21 and the through hole 242b of the connecting member 242, and a nut 244 is screwed into the portion protruding from the through hole 242b.
• the shoulder bolt 231 is inserted through the through hole 241c of the connection member 241 and the through hole 242c of the connection member 242, and is screwed with the nut 245.
• the connection member 24 is fixed to the first member 21 by the above configuration, and the connector 400 of the tensioning device 100 is connected to the through hole 24a.
• the motor 4 has a rotating shaft 41 and a case 42
• the transmission mechanism 5 has timing pulleys 51-53, a timing belt 54, and a plate 55.
• the case 42 is fixed to the plate 55, and the rotating shaft 41 is inserted into a through hole 55a of the plate 55.
• the timing pulley 51 is fitted to the rotating shaft 41 at a portion protruding from the through hole 55a.
• a bolt 521 is inserted into the timing pulley 52, and the head of the bolt 521 abuts against the timing pulley 52.
• the bolt 521 is further inserted into a through hole 55b of the plate 55, and a nut 522 is screwed into the portion protruding from the through hole 55b.
• the timing pulley 53 is fitted to the screw shaft 31 as described above.
• the plate 55 is screwed to the first member 21 by the bolts 551 and 552. With the above configuration, the timing pulleys 51 to 53 are arranged so that a timing belt 54 for transmitting power can be wound around them.
• the timing belt 54 is looped around the timing pulleys 51-53 and attached to the wire gripper 1.
• the timing pulley 52 is displaced by screwing the bolt 523 into the screw hole 55c and tightening the bolt 523 (see the thick arrow pointing approximately upward in FIG. 9A).
• the timing pulley 52 is displaced by tightening the bolt 523, and the timing belt 54 can be adjusted to a predetermined tension.
• the transmission mechanism 5 can smoothly transmit the power from the motor 4 to the screw shaft 31.
• the rotational force of the rotating shaft 41 of the motor 4 can be transmitted to the screw shaft 31 of the displacement mechanism 3 via the timing pulleys 51-53 and the timing belt 54.
• the timing pulleys 51-53 and the timing belt 54 constitute a rotational force transmission mechanism.
• the motor 4 is configured to generate rotational power for applying power to the displacement mechanism 3, and specifically, the motor 4 is configured to apply power to the screw shaft 31.
• the wire gripper 1 can be operated with higher accuracy to perform the wire tensioning work quickly and safely.
• the transmission mechanism 5 is configured to transmit the rotational power generated by the motor 4 to the displacement mechanism 3, and specifically, the transmission mechanism 5 is configured with a belt (for example, a timing belt 54) or a gear.
• the wire gripper 1 can be made more compact.
• the configuration is not limited to the screw engagement between the screw shaft 31 of the displacement mechanism 3 and the screw hole 22c of the second member 22, and for example, a rack-and-pinion mechanism may be adopted.
• at least one of the first member 21 and the second member 22 is configured to have a rack
• the displacement mechanism 3 has a pinion that meshes with the rack, thereby forming a rack-and-pinion mechanism.
• the motor 4 is configured to apply power to the pinion. This allows the wire gripper 1 to be operated with greater precision, allowing wire stringing work to be performed quickly and safely.
• the line type detection mechanism 6 is configured in a block shape.
• a bolt 63 is inserted into the through hole 6a of the line type detection mechanism 6, and the portion protruding from the through hole 6a is screwed into the screw hole 21g of the first member 21. In this way, the line type detection mechanism 6 is fixed to the first member 21.
• the wire type detection mechanism 6 includes a first position sensor 61 and a second position sensor 62, and the first position sensor 61 and the second position sensor 62 include a button 61a and a button 62a, respectively.
• a third member 23 is provided near the wire type detection mechanism 6, and the third member 23 is configured to press the button 61a or the button 62a as the position of the wire gripping portion 2 changes. Specifically, as shown in FIG. 5A, when the clamping space CS is narrowed to a predetermined size, the button 62a is pressed by the protrusion 23c of the third member 23. Also, as shown in FIG. 5B, when the clamping space CS is expanded to a predetermined size, the button 61a is pressed by the side of the third member 23. By pressing the button 61a and the button 62a, the first position sensor 61 and the second position sensor 62 can be turned on.
• the motor 4 of this embodiment has an encoder 60 (not shown) inside and is configured to be able to measure the number of rotations of the rotating shaft 41.
• the line type detection mechanism 6 further has an encoder 60, which is configured to measure the number of rotations of the motor 4.
• Examples of the encoder 60 include an optical type, a mechanical (contact type), a magnetic type, and an electromagnetic induction type.
• the encoder 60 is provided inside the motor 4, but is not limited to this and may be provided in, for example, the displacement mechanism 3, the transmission mechanism 5, etc.
• the position where the side surface of the third member 23 presses the button 61a of the first position sensor 61 can be identified as the position where the encoder 60 starts measuring the number of rotations of the rotating shaft 41.
• the number of rotations of the rotating shaft 41 is measured by the encoder 60 with this position as the base point.
• the rotation of the rotating shaft 41 of the motor 4 stops or becomes slower at the clamping position.
• the wire gripping device 1 can identify the state in which the linear body Ln is clamped.
• the wire gripping device 1 may identify the state in which the linear body Ln is clamped by grasping the change in the current value during the operation of the motor 4.
• the wire gripping device 1 can measure the thickness (outer diameter) of the linear body Ln clamped by the wire gripping section 2. The type of linear body Ln can be detected by comparing the measurement results with the database.
• the first position sensor 61 is configured to identify the position at which the measurement of the number of rotations begins, thereby detecting the type of linear body Ln that is clamped by the wire gripping portion 2. In this manner, the type of linear body Ln can be detected by the wire gripping device 1, and the wire stringing work can be performed quickly and safely.
• the clamping space CS is narrowed to a predetermined size, so the power supply to the motor 4 can be stopped.
• the second position sensor 62 is configured to identify the position at which the rotation of the motor 4 is stopped. According to this embodiment, deterioration and damage to the wire gripper 1 can be preferably prevented.
• the wire type detection mechanism 6 that detects the type of the linear body Ln clamped in the wire gripping portion 2 is not limited to the above configuration, and may be configured, for example, by providing a pressure sensor on the wire gripping surface 21a of the first member 21 and the wire gripping surface 22a of the second member 22, or by providing a sensor that measures the distance between the first member 21 and the second member 22.
• the power supply unit 8 is disposed below the motor 4, and has a battery 81 and a battery attachment section 82.
• the battery 81 is detachably attached to the battery attachment section 82, which is fixed to the gripping wire section 2.
• the power supply unit 8 is configured to be able to supply power to at least the motor 4.
• the battery 81 can be, for example, a dry cell, a primary battery such as a solar cell, or a secondary battery such as a lithium ion battery.
• control board 7 is attached to a support base 74, which is fixed to the gripping wire portion 2.
• a cover is provided to cover the control board 7.
• FIG. 10 is a block diagram showing the configuration of the control board 7.
• the control board 7 shown in FIG. 10 is, for example, a dedicated control device that controls at least the motor 4, and is configured to electrically control at least the rotation of the motor 4.
• the control board 7 has a communication unit 71, a storage unit 72, and a control unit 73, and these components are electrically connected via a communication bus 70.
• the wire type detection mechanism 6 and the power supply unit 8 are also electrically connected to the control board 7.
• the communication unit 71 is configured to be capable of transmitting various electrical signals from the control board 7 to external components.
• the communication unit 71 is also configured to be capable of receiving various electrical signals from the external components to the control board 7. More preferably, the communication unit 71 has a network communication function, which allows communication of various information with external devices via a network such as the Internet.
• the communication unit 71 is preferably a wired communication means such as USB, IEEE 1394, Thunderbolt (registered trademark), wired LAN network communication, etc., but may also include wireless LAN network communication, mobile communication such as 3G/LTE/5G, BLUETOOTH (registered trademark) communication, etc. as necessary. In other words, it is more preferable to implement it as a collection of multiple communication means.
• the memory unit 72 stores various information defined by the above description. This can be implemented, for example, as a storage device such as a solid state drive (SSD) that stores various programs related to the wire gripper 1 executed by the control unit 73, or as a memory such as a random access memory (RAM) that stores temporarily required information (arguments, arrays, etc.) related to program calculations.
• the memory unit 72 stores various programs and variables related to the wire gripper 1 executed by the control unit 73. It is particularly preferable that information related to construction plans to be carried out using the wire gripper 1 is stored.
• the control unit 73 processes and controls the overall operation related to the wire gripper 1.
• the control unit 73 is, for example, a central processing unit (CPU) not shown.
• the control unit 73 realizes various functions related to the wire gripper 1 by reading out specific programs stored in the memory unit 72. In other words, information processing by the software stored in the memory unit 72 is specifically realized by the control unit 73, which is an example of hardware. Note that the control unit 73 is not limited to being single, and it may be implemented with multiple control units 73 for each function. It may also be a combination of these.
• the supports 300a and 300b are hooked onto the insulated electric wire.
• the pair of wire grippers 1 connected to both ends of the expander 200 are attached to the insulated electric wire using a remote control device.
• the first member 21, the second member 22, and the third member 23 are displaced to the second state, the insulated electric wire is inserted into the clamping space CS, and the wire gripping surface 21a of the first member 21 is hooked onto the insulated electric wire.
• the wire gripper 1 is started using an external terminal (not shown).
• the control unit 73 of the control board 7 determines whether the position at which the encoder 60 starts measuring the number of rotations of the rotating shaft 41 has been specified. If the position has not been specified, a learning operation is performed. Specifically, the control board 7 controls the operation of the motor 4 to a position where the button 61a of the first position sensor 61 is pressed on the side of the third member 23, either automatically or in response to a user's operation.
• the control board 7 stops the operation of the motor 4 and specifies the position at which the encoder 60 starts measuring the number of rotations of the rotating shaft 41.
• the learning operation may be performed each time the wire gripper 1 is used, and may be controlled by the control board 7 to set the position state of the wire gripper 1 after use as the learning position, for example. Alternatively, the learning operation may be performed when the number of times the wire gripper 1 has been used reaches a predetermined number of times, when the period/time during which the wire gripper 1 has been used reaches a predetermined period/time, etc.
• the motor 4 is operated using an external terminal (not shown) to rotate the screw shaft 31 of the displacement mechanism 3 in a predetermined direction via the transmission mechanism 5.
• the first member 21 screwed onto the screw shaft 31 slides relative to the first member 21, and the third member 23 rotates relative to the first member 21 and the second member 22.
• the third member 23 rotates, the first member 21, the second member 22, and the third member 23 form a hole in the clamping space CS through which the insulated electric wire can be inserted.
• the insulated electric wire before clamping can be kept in the clamping space CS.
• the gripping surface 21a of the first member 21 and the gripping surface 22a of the second member 22 approach each other, narrowing the size of the clamping space CS, so that the insulated electric wire can be clamped.
• the pair of wire grippers 1 can be fixed to the insulated electric wire.
• the wire gripper 1 also grasps the change in the angular velocity of the rotating shaft 41 based on the input of the encoder 60, and stops the operation of the motor 4 when the rotation of the rotating shaft 41 of the motor 4 stops or becomes slower. Alternatively, the wire gripper 1 may stop the operation of the motor 4 in response to the user's operation of an external terminal. This maintains the first mode of the first member 21 and the second member 22, and allows the insulated electric wire to continue to be clamped.
• the wire type detection mechanism 6 detects the type of insulated electric wire using the measurement result of the thickness (outer diameter) of the clamped insulated electric wire. The result is notified to an external terminal (not shown). Furthermore, if the insulated electric wire to be clamped has been registered in advance by the user, it is determined whether the insulated electric wire clamped by the wire gripper 1 matches the registered insulated electric wire, and the result is notified to an external terminal (not shown).
• the operating unit 205 is operated by a remote control device to contract the longitudinal dimension of the expander 200 and bring the wire grippers 1 closer to each other. This makes it possible to make the insulated electric wire taut on the outside of the wire grippers 1 of the insulated electric wire and to relax it in the area between the two wire grippers 1 of the insulated electric wire.
• the operating unit 205 is operated using the remote control device to extend the longitudinal dimension of the expander 200 and move the wire grippers 1 away from each other.
• the motor 4 is operated using an external terminal to rotate the screw shaft 31 of the displacement mechanism 3 in the opposite direction to the above via the transmission mechanism 5. This displaces the first member 21 and the second member 22 from the first position to the second position, and releases the clamping of the insulated electric wire.
• the wire tensioning device 100 is removed from the insulated electric wire using the remote control device.
• the wire gripper 1 is configured to clamp the insulated wire using the motor 4. Therefore, the wire gripper 1 itself assists in work that requires a large amount of force, resulting in good operability. Also, whereas in the past work was performed by two workers aboard a bucket in the air, this can now be done by a single worker, resulting in excellent workability. Furthermore, the remaining worker can grasp the working status of the worker on the bucket on the ground and issue accurate instructions, resulting in high safety. According to this embodiment, the wire gripper 1 can be easily operated to perform wire stringing work quickly and safely.
• the wire gripper 1 Furthermore, by attaching various sensors to the wire gripper 1, data obtained during work can be sent to an external terminal (e.g., a tablet terminal, etc.) via the communication unit 71 of the control board 7 and stored. Then, based on the obtained data, it is possible to check the work history and manage whether or not the wire gripper 1 needs repair, which is also preferable from the viewpoint of improving safety.
• the external terminal may be a foot switch, a voice recognition device, etc. In this case, even when working alone, both hands can be free when operating the wire gripper 1. Furthermore, even when working simultaneously on multiple insulated electric wires using the wire tensioning devices 100, wire tensioning work, etc. can be performed using a single external terminal.
• a wire gripper used to clamp a linear object comprising a wire gripping section, a displacement mechanism, and a motor, the wire gripping section having a first member and a second member, the first member having a tapered groove, and the second member being disposed so as to abut against a portion of the groove, thereby forming a clamping space in the gap where they are not abutting, the displacement mechanism being configured to displace the positional configuration of the first member and the second member, thereby changing the size of the clamping space, where the positional configuration has a first configuration and a second configuration, in the first configuration, the linear object is clamped by the wire gripping section, and in the second configuration, the clamping of the linear object by the wire gripping section is released, and the motor being configured to generate rotational power for providing power to the displacement mechanism.
• the wire gripper can be easily operated, allowing wire stringing work to be carried out quickly and safely.
• the wedge effect allows the linear object to be clamped more firmly, making the wire stringing work quicker and safer.
• a wire gripper according to any one of (1) to (3) above, wherein the displacement mechanism is configured to displace at least one of the first member and the second member in the longitudinal direction of the linear body, and the size of the clamping space changes depending on the position in the longitudinal direction.
• a wire gripper according to any one of (1) to (4) above, wherein at least one of the first member and the second member has a screw hole, the displacement mechanism has a screw shaft that screws into the screw hole, and the motor is configured to apply power to the screw shaft.
• the wire gripper can be operated with greater precision, allowing wire stringing work to be carried out quickly and safely.
• a wire gripper according to any one of (1) to (4) above, wherein at least one of the first member and the second member has a rack, the displacement mechanism has a pinion that meshes with the rack, thereby forming a rack-and-pinion mechanism, and the motor is configured to apply power to the pinion.
• the wire gripper can be operated with greater precision, allowing wire stringing work to be carried out quickly and safely.
• wire gripper according to any one of (1) to (6) above, further comprising a transmission mechanism, the transmission mechanism being configured to transmit the rotational power generated by the motor to the displacement mechanism.
• This type of configuration allows the wire gripper to be made smaller.
• a wire gripper according to any one of (1) to (8) above, wherein the wire gripping portion further includes a third member, the third member is arranged to be part of the clamping space, the displacement mechanism is configured to displace the third member in accordance with the displacement of the positional aspect, and in the first aspect, a hole through which the linear object can be inserted is formed in at least a part of the clamping space, and in the second aspect, a gap through which the linear object can be inserted and removed is formed in the clamping space.
• This type of configuration makes it easier to attach the linear body to the wire gripper, and wire stringing can be done quickly and safely.
• a wire gripper according to any one of (1) to (9) above, further comprising a wire type detection mechanism, the wire type detection mechanism having an encoder and a first position sensor, the encoder configured to measure the number of rotations of the motor, and the first position sensor configured to identify the position at which to start measuring the number of rotations, thereby detecting the type of the linear object being clamped by the wire gripper.
• the type of linear object can be detected by the wire gripper, and the wire stringing work can be carried out quickly and safely.
• This configuration effectively prevents deterioration and damage to the wire gripper.
• a wire tensioning device comprising a pair of wire grippers and an expander, each of the pair of wire grippers being configured as described in any one of (1) to (13) above, the expander being provided with the pair of wire grippers at both ends thereof, and configured to move the pair of wire grippers holding the linear body closer together and apart.
• the wire gripper can be easily operated to perform wire stringing work quickly and safely. Of course, this is not the case.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Electric Cable Installation (AREA)
• Manipulator (AREA)
• Clamps And Clips (AREA)
• Transmission Devices (AREA)

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Publications (1)

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ID=93519473

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• 2023
  • 2023-12-05 KR KR1020257040558A patent/KR20260008775A/ko active Pending
  • 2023-12-05 WO PCT/JP2023/043443 patent/WO2024236845A1/ja not_active Ceased
  • 2023-12-05 JP JP2025520389A patent/JPWO2024236845A1/ja active Pending
• 2024
  • 2024-01-18 TW TW113102026A patent/TW202448059A/zh unknown
  • 2024-04-26 CN CN202420885276.1U patent/CN222531189U/zh active Active

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