JP5816492B2 - Wire cutting tool with clamp mechanism - Google Patents

Description

  The present invention relates to an aerial distribution line installed between utility poles and an electric wire cutting tool used when cutting an electric wire on the ground, and more specifically, an electric wire cutting tool with a clamp mechanism provided with a clamp mechanism that grips the electric wire when the electric wire is cut. About.

  Conventionally, a wire cutting tool has been used for cutting overhead distribution wires installed between utility poles in a suspended state, or cutting extra lengths when connecting wires, and then variously cutting end portions. The electrical connection parts are attached.

  As the wire cutting tool used for this cutting work, in addition to a commercially available manual wire cutting tool such as a clipper, there is a wire cutting tool that uses electric power, hydraulic pressure, etc. as a power source. Cutting work was performed in a working bucket or on the ground.

  In addition, indirect hot-wire work under uninterruptible power has been promoted in the distribution line work, and cutting work is performed while the overhead distribution lines installed between the power poles are suspended and the adjacent wires are energized. Is often done. The applicant has already proposed a wire cutting tool for this purpose in Patent Document 1. This tool cuts the wire while clamping the wire with the clamp attached to the tool at the time of cutting the wire, and its use is intended for a wire with a relatively small outer diameter (10 to 17 mm) and is light in weight. It was easy to use.

Japanese Patent Laying-Open No. 2004-121585 (paragraphs 0017 and 0018, FIG. 2)

  However, in recent years, electric wire cutting tools that can easily cut an electric wire having a relatively large outer diameter (10 to 27 mm) are required in accordance with an increase in the size of electric equipment and an increase in customers' demand for electric power consumption. It has become. For this purpose, it is necessary to secure a larger gripping stroke than the conventional wire cutting tool and then perform cutting.

  Such a wire cutting tool clamping mechanism tends to have a complicated structure and a large overall weight. However, there are many wire cutting work sites on pillars and in high-altitude bucket vehicles. Since the space is extremely small, a light, compact, and workable product that can visually confirm the clamp portion of the wire being cut is required.

  Therefore, in view of the above problems, the present invention has a relatively large diameter (10 to 27 mm) at the time of cutting the electric wire, and each size of electric wire included in the large diameter range is in accordance with each size. It is a first object to provide an electric wire cutting tool with a clamp mechanism that can be easily cut after being securely clamped with a clamping force and that can be easily cut even in a limited working space.

  In addition, the present invention provides a wire cutting tool with a clamp mechanism that can ensure the cutting operation and save labor by making it possible to visually check the clamp length and the clamp state of the wire at the time of cutting the wire. Second purpose.

The first object of the present invention is to provide a fixed blade having a blade surface at the tip, a movable blade that cuts an electric wire by a blade surface that opens and closes to the fixed blade, and a plate-like shape that fixes the fixed blade to a side surface. A plate-like movable side link adjacent to the fixed blade side link and the side surface of the movable blade with a gap between the fixed blade side link and the movable blade link. A fulcrum bolt that penetrates substantially above the central portion and pivotally supports these members, and the other end of the movable blade is rotated around the fulcrum bolt, thereby moving the blade surface of the movable blade to the fixed blade. A movable blade driving means for opening and closing the blade surface, and a fixed blade side that is pivotally supported by the fulcrum bolt and that opens and closes in synchronization with each of the fixed blade and the movable blade to sandwich the electric wire. Clan comprising a clamp and a movable blade side clamp Comprising a unit, the entire of the clamping unit, as well are located at least apart laterally a distance corresponding to the thickness of the movable link, said movable blade drive means and the base end portion of the movable blade interposed between, besides, the by the pivoted movable cutter side clamp driving lever fulcrum bolt, the movable blade side clamp the first invention according to the clamping mechanism with the wire cutting tool characterized in that it is opened and closed Can be achieved.

  Here, the “electric wire” is a broad concept, and includes not only a normal insulation-coated electric wire but also other severable linear bodies.

  Further, as the “movable blade driving means”, it is preferable to use a ball screw unit or the like that converts, for example, manual or pneumatic, hydraulic pressure or the like a rotational movement into a lifting movement. It may be a linear motion exercise.

  Further, the shape of the cutting edge of the “fixed blade and movable blade” is not particularly limited, and may be any shape such as a straight blade or a sickle blade.

  Furthermore, “at least the distance corresponding to the plate thickness (t) of the movable side link” refers to, for example, a spring washer, a collar, etc. attached to the front and rear of the movable side link in addition to the plate thickness (t) of the movable side link. That is, the thickness of the fastener may be included. The point is that the clamp unit is mounted independently with respect to the fixed blade and the movable blade at the above-mentioned distance.

The first object of the present invention is to provide a fixed blade having a blade surface at the tip, a movable blade that cuts an electric wire by a blade surface that opens and closes to the fixed blade, and a plate-like shape that fixes the fixed blade to a side surface. A plate-like movable side link adjacent to the fixed blade side link and the side surface of the movable blade with a gap between the fixed blade side link and the movable blade link. A fulcrum bolt that penetrates substantially above the central portion and pivotally supports these members, and the other end of the movable blade is rotated around the fulcrum bolt, thereby moving the blade surface of the movable blade to the fixed blade. A movable blade driving means for opening and closing the blade surface, and a fixed blade side that is pivotally supported by the fulcrum bolt and that opens and closes in synchronization with each of the fixed blade and the movable blade to sandwich the electric wire. Clan comprising a clamp and a movable blade side clamp Comprising a unit, the entire of the clamping unit, as well are located at least apart laterally a distance corresponding to the thickness of the movable link, said movable blade drive means and the base end portion of the movable blade The movable blade side clamp is opened and closed by a movable blade side clamp drive lever interposed between and supported by the fulcrum bolt, and the fulcrum bolt includes the fixed blade side link and the movable blade. The fixed blade side clamp of the clamp unit is provided on the outer surface of each of the fixed blade side link and the movable blade link in the vicinity of the distal end portion thereof, and has a male screw portion of a length protruding from each outer surface of the link. By fixing the socket for engaging and disengaging the clamp unit, the entire clamp unit can be attached to and detached from the fixed blade side link side or the movable blade side link side. It can also be achieved by a second invention according to the clamping mechanism with the wire cutting tool according to claim.

  According to the second invention, the operator can easily attach the clamp unit to the desired side on the left side or the right side of the fixed blade and the movable blade regardless of the working environment and the state of the column.

  The said 2nd objective of this invention can be achieved by providing the window which can visually recognize the extra length part of an electric wire in a fixed blade side clamp or / and a movable blade side clamp as said clamp unit.

  In this case, in the vicinity of the window where the extra length portion of the electric wire can be visually recognized, there are marks that can measure the length of the extra length portion of the electric wire, for example, markings such as scale lines, scale numbers, etc. (Including other indications) or the like.

  According to the first invention, the clamp unit is provided independently at a position away from both blades, and the clamping force of the clamp unit is generated by a drive system independent of the drive system of both blades. Even if it is an electric wire, a wire cutting tool with a clamp mechanism that can be easily cut after being securely clamped with a strong clamping force according to the wire diameter is obtained.

  Further, according to the second invention, the operator can easily attach the entire clamp unit to either the left or right side of the both blades depending on the work environment and the state of the column. In addition to the operational effects, the mounting work can be saved even in a limited narrow work space, and a wire cutting tool with a clamp mechanism that can be easily cut can be obtained.

  According to the third invention, the clamp unit is provided with the clamp length detection window and the graduation line, so as a preparatory work before cutting the wire, the relative positional relationship between the wire to be cut and the cutting blade can be directly visually observed. The wire can be cut without error in the cutting position.

It is a front view of one embodiment of a clamp fixed type electric wire cutting tool concerning the present invention. It is a right view of the wire cutting tool of FIG. It is a disassembled perspective view of the wire cutting tool of FIG. It is a disassembled perspective view of the clamp unit in the electric wire cutting tool of FIG. It is a figure which shows the use condition of the wire cutting tool of FIG. It is a front view of one Embodiment of the other example of the clamp attachment / detachment type electric wire cutting tool which concerns on this invention. It is a right view of the wire cutting tool of FIG. It is a disassembled perspective view of the electric wire cutting tool of FIG. It is a disassembled perspective view of the clamp unit in the electric wire cutting tool of FIG.

DESCRIPTION OF SYMBOLS 1 Fixed blade 2 Movable blade 3 Connecting shaft 5 Ball screw 7 Ball screw unit 8 Movable blade raising / lowering rod 10 Cutting body part 21 Movable blade drive pin 30 Link part 31 Fixed blade side link 32 Movable blade side link 34 Pivot collar 35, 35A fulcrum bolt 50, 50A clamp unit 51, 51A clamp unit body 52, 52A fixed blade side connecting arm 53, 53A movable blade side connecting arm 54 movable blade side clamp drive lever 56 fixed blade side clamp 56m, 57m clamp length detection window 56n, 57n Scale line 57 Movable blade side clamp 60 Socket 100 Clamp fixed type wire cutting tool (present invention)
200 Clamp detachable wire cutting tool (present invention)
t Thickness of movable blade side link W Electric wire

[Embodiment 1]
Next, an embodiment for carrying out the present invention will be described with reference to the drawings.

  1 is a front view of an embodiment of a clamp-one-side fixed wire cutting tool 100 according to the present invention, FIG. 2 is a right side view of the wire cutting tool 100 of FIG. 1, and FIG. 3 is a wire cutting tool of FIG. FIG.

  In the following description, for convenience, the top, bottom, left and right are referred to with reference to the front view of the wire cutting tool 100 of FIG.

  In these drawings, the clamp-fixed wire cutting tool 100 according to the present invention is roughly composed of a cutting main body 10 and a clamp unit 50, and the clamp unit 50 is fixed to the right side of the cutting main body 10. It is of the type. Therefore, the invention of this embodiment is referred to as a “clamp fixed type electric wire cutting tool”.

  Here, the cutting main body 10 is for cutting the electric wire W by converting the external blade (not shown) from the connecting shaft or the manual rotation torque of the operator into the opening / closing movement of the movable blade 2 with respect to the fixed blade 1. In other words, it is the main body of the cutting part, and its basic configuration is the same as that of Patent Document 1 described above. In addition, the code | symbol 10a is a plastic cover which covers the whole cutting | disconnection main-body part 10. As shown in FIG.

  On the other hand, the clamp unit 50 is a unit composed of a plurality of members for simultaneously clamping the electric wire W when the electric wire W is cut, and is fixed to the right side of the fixed blade 1 and the movable blade 2 as shown in FIG. Yes.

First, the cutting main body 10 will be described.
<Configuration of Cutting Body 10>
As shown in FIG. 3, the cutting main body 10 includes a fixed blade 1 and a movable blade 2, a movable blade driving means 20, and a link portion 30.

  The movable blade driving means 20 includes a connecting shaft 3 for connecting to an external power such as a manual operation rod (so-called hot stick) or a hydraulic or pneumatic motor (not shown), and a connecting shaft for manual or external power connection and rotation. 3 is formed of a cylindrical coupling fitting 4 for preventing so-called co-rotation, a ball screw unit 7 including a ball screw 5 and a nut 6 with a flange, and a movable blade raising / lowering rod 8 on the upper side thereof. .

  The connecting shaft 3 has a hexagonal cross section. As shown in FIG. 1, the upper portion of the connecting shaft 3 is integrally connected by a ball screw 5 and a knock pin 9 and is mounted between the cylindrical connecting bracket 4. It is rotatably supported by a ball bearing 4a.

  Returning to FIG. 3, a rectangular flange 4 b is integrally formed on the upper portion of the cylindrical connection fitting 4, and a pair of link holders 4 c are formed on the upper portion of the flange 4 b so as to face each other.

  The lower blade 8a of the movable blade elevating rod 8 and the upper flange 6a of the flanged nut 6 are integrally fastened by a bolt (not shown), and the upper portion of the rod 8 is formed in a yoke shape.

  Therefore, when the connecting shaft 3 is rotated forward and backward by manual or external power (not shown), the ball screw 5 connected to the upper portion of the connecting shaft 3 is also rotated forward and backward in the same manner. Therefore, the movable blade lifting rod 8 fixed to the flanged nut 6 also moves up and down at the same time.

  The link portion 30 is a pair of opposed plates, a plate-shaped fixed blade side link 31 that fixes the fixed blade 1 to the side surface, and a hexagon bolt 1b that is a fixing member of the fixed blade 1 to the link 31. The collar 1c, the hexagonal nut 1d, the plate-like movable blade side link 32 adjacent to the right side surface of the movable blade 2 via a gap, and the stay shaft 33 that determines the distance between the links 31 and 32 and connects them together. And the nuts 33a and 33a with the bag, the fixed blade 1, the movable blade 2 and the links 31 and 32 are attached to the inside thereof, and the fulcrum when the fixed blade 1 and the movable blade 2 are opened and closed. A pivotal collar 34 serving as a role and a lower fulcrum bolt 35 are configured.

  Here, the fixed blade side link 31 and the movable blade side link 32 are both pin-coupled by a link holder 4c on the upper part of the cylindrical connecting bracket 4 and a hexagon socket bolt 32a. The mounting holes 31a and 32b of the pivot collar 34 having an inner diameter slightly larger than the outer diameter of the pivot collar 34 are provided at positions substantially above the central portion of the pivot collar 32, respectively.

  Each of the fixed blade 1 and the movable blade 2 is a sharp single-edged blade whose blade surfaces 1a and 2a formed at one end thereof have a substantially sickle shape.

  Of these, the fixed blade 1 has a hexagonal bolt 1b inserted from the left side of the fixed blade side link 31 above the inner side surface of the fixed blade side link 31, passing through the collar 1c and the movable blade side link 32, and a hexagon nut. It is fixed at 1d. Accordingly, the upper portions of the links 31 and 32 are integrally coupled with the total value of the thickness of the fixed blade 1 and the length of the collar 1c as a width dimension between the links 31 and 32.

  Both the blades 1 and 2 are located between the movable blade side link 32 and the fixed blade side link 31 in a state where the respective blade surfaces 1a and 2a are stacked back to back.

  Mounting holes 1d and 2b of the pivot collar 34 are provided at positions substantially above the base end portion of the fixed blade 1 and the central portion of the movable blade 2, respectively. A fulcrum bolt 35 is inserted therethrough.

  Here, the overall length of the collar 34 is the same as the length between the inner surfaces when the links 31 and 32 are assembled together, and the length under the fulcrum bolt 35 is from the left side surface of the fixed blade side link 31. It has a length that can be sufficiently screwed up to the female screw hole 35b of the fixing knob 59 of the clamp unit 50 described later in FIG.

  Therefore, as shown in FIG. 3, the fulcrum bolt 35 is inserted in the order of the fixed blade side link 31 → the fixed blade 1 → the movable blade 2 → the pivot collar 34 → the movable blade side link 32 from below, and the female screw hole of the clamp unit 50 is inserted. When screwed into 35b (FIG. 4), the fixed blade side link 31 and the movable blade side link 32 can be firmly fixed to a fixed width therebetween, and the movable blade 2 can be attached to the fixed blade 1 with the collar 34 as a fulcrum. It can rotate with respect to it.

  On the other hand, the base end portion of the movable blade 2 is pin-coupled to the yoke-shaped distal end portion of the movable blade raising / lowering rod 8 on the lower side of the movable blade drive pin 21, and E-type is attached to both ends of the movable blade drive pin 21. A retaining ring 22 is attached.

  Here, when the connecting shaft 3 rotates and the ball screw nut 6 moves up and down, the movable blade lifting rod 8 integrated therewith also moves up and down.

  Accordingly, the movable blade 2 rotates in the forward and reverse directions around the pivotal collar 34, but the fixed blade 1 is fixed to the fixed blade side link 31, so that the movable blade 2 is eventually moved relative to the fixed blade 1. To open and close.

<Configuration of clamp unit 50>
Next, the configuration of the clamp unit 50 will be described with reference to FIGS. 3 and 4 again.

  As shown in FIG. 3, the clamp unit 50 is roughly divided into a clamp unit main body 51, a pair of fixed blade side connecting arms 52 and a movable blade side for fixing the clamp unit main body 51 to the cutting main body portion 10 described above. The connecting arm 53 and the movable side clamp drive lever 54 for transmitting the driving force from the cutting main body 10 to the clamp unit main body 51 are also configured.

  As shown in the lower left of FIG. 4, the fixed blade side connecting arm 52 is rod-shaped, and at one end thereof, a pin 32 is rotatably pivoted by an E-shaped retaining ring 32 d in the mounting hole 32 c of the movable blade side link 32. A stop ring groove 52a with a falling diameter is formed for stopping, and a male screw 52b for fixing to the clamp unit main body 51 is formed at the other end.

  Further, the movable blade side connecting arm 53 at the lower right of the figure is also rod-shaped, and at one end thereof, the mounting hole 54a of the movable side clamp drive lever 54 (FIG. 3) can be rotated by an E-shaped retaining ring 53c. A retaining ring groove 53a with a falling diameter is formed for pinning, and a male screw 53b for fixing to the clamp unit main body 51 is formed at the other end.

  As shown in FIG. 3, the movable-side clamp drive lever 54 is a plate having a substantially “<” shape, and the upper portion of the movable blade drive pin 21 is in the mounting hole 54b at the base end. The above-mentioned movable blade side connecting arm 53 is loosely fitted into the mounting hole 54a at the distal end and freely rotated by the E-type retaining ring 53c. The fulcrum bolt 35 of the cutting main body 10 passes through the fulcrum hole 54d at the substantially central portion from the tip portion and is screwed into the female screw hole 35b of the fixing knob 59 of the clamp unit main body 51. .

  In addition, as shown in FIG. 3, when the arm length ratio (L1 / L2) of the lengths L1 and L2 from the respective mounting holes 54b and 54a to the fulcrum hole 54d is set to 1 or more, according to the lever principle, The clamping force can be set large.

  Therefore, when the movable blade raising / lowering rod 8 moves up and down, the movable-side clamp drive lever 54 performs a swaying motion around the fulcrum hole 54d by the movable blade-driving pin 21 connected thereto. The movable blade side connecting arm 53 at the tip can also swing in the direction of the arrow in the figure.

  The detailed structure of the clamp unit main body 51 in the upper part of FIG. 3 is shown in FIG.

  In FIG. 4, the clamp unit main body 51 is located at the base end portion of the fixed blade side clamp 56, the movable blade side clamp 57, and the respective clamps 56, 57, and is a pivot for pivotally supporting both the clamps 56, 57. A support collar 58 and a fixed knob 59 are included.

  The fixed blade side clamp 56 includes a fixed blade side clamp holder 56a to which the above-described fixed blade side connecting arm 52 is screwed into the screw hole 55a and fixed, a compression coil spring 56b, and a fixed clamp 56c. The compression coil spring 56b is positioned between the fixed blade side clamp holder 56a and the fixed clamp 56c, and is prevented from being removed by a concave spring seat 56d provided on the inner side of both members.

  On the other hand, the movable blade side clamp 57 includes a movable blade side clamp holder 57c, a movable blade side clamp holder 57a to which the movable blade side connecting arm 53 is screwed into a screw hole 57g (FIG. 4), and a compression. The compression coil spring 57f is similarly positioned between the movable blade side clamp holder 57a and the movable clamp 57j so as not to come off by a concave spring seat 57e provided inside both members. It has become.

  The movable blade side clamp holder 57c is a lever-shaped plate, and the base end portion is provided with the through hole 57h of the fulcrum bolt 35 of the cutting main body 10 described above, and the movable blade side clamp holder 57a is cross-shaped at the distal end portion. It is fixed by a bolt 57d with a hole. Note that the convex portions 57i provided at the base end portions of both the fixed blade side clamp holder 56a and the movable blade side clamp holder 57a are engaged with each other so that the rotation phase angle of these holders is an arbitrary angle. It is for regulation or adjustment.

  Each of the fixed clamp 56c and the movable clamp 57j has a distal end formed in a substantially hammer shape, and a proximal end of the pivot clamp hole 57h having an inner diameter enough to allow the collar 58 to pass therethrough. , 58a are formed. The outer shapes of the fixed clamp 56c and the movable clamp 57j are substantially the same, and the difference is that the electric wire W can be clamped at a phase angle of approximately 180 degrees, so that they are formed out of order.

  Arc-shaped wire gripping surfaces 56e and 57k are formed on the inner surfaces of the clamps 56 and 57 on the wire gripping side so as to correspond to the outer diameter of the wire W to be cut, and the axial direction thereof (the X axis in FIG. 1) Direction) has a constant wire gripping length L3.

  In addition, clamp length detection windows 56m and 57m are provided on the electric wire gripping surface along the axial direction so that the clamp length of the electric wire W clamped by the operator can be confirmed on the outer peripheral surfaces of the fixed clamp 56c and the movable clamp 57j. It is formed to penetrate.

  Further, in the vicinity of the clamp length detection windows 56m and 57m, scale lines 56n and 57n for measuring the end position of the clamped electric wire W and their numbers (FIG. 1) are engraved.

  The uppermost fixing knob 59 is a so-called nut for assembling the above-described members in the vertical relationship in the figure and then as the clamp unit main body 51, and is screwed into the fulcrum bolt 35 described above. A female screw hole 35b is formed.

  For assembling these members, first, a pivot collar 58 is inserted into a fulcrum bolt 35 projecting upward from the cutting main body 10, and the fixed side clamp holder is centered on the pivot collar 58 from below as shown in the figure. 56a → fixed clamp 56c → movable clamp 57j → movable side clamp holder 57c are inserted in this order, and the fixing knob 59 is fully screwed into the male thread portion 35a of the fulcrum bolt 35 projecting further upward to be coupled together. The entire unit 50 is fixed to the right side surface of the movable side link 32 of the cutting main body 10 described above.

  The assembly work as the clamp unit 50 is completed by assembling the above members.

  Since the configuration of the first embodiment has been described above, the operation and effect of the invention of the clamp-one-side fixed wire cutting tool 100 according to the first embodiment with reference to FIGS. ).

  FIG. 5 shows a relative positional relationship between the fixed blade 1 and the movable blade 2 described in FIG. 3 and the clamp unit main body 51 described in FIG. 4. FIG. FIG. 5B is a diagram in which both clamps 56 and 57 are in a fully open state, and FIG. 5C is a diagram in which the fixed blade side clamp 56 and the movable blade side clamp 57 are provided with a coating layer. It is a figure of the state which clamped the electric wire W. FIG.

<Operation of the invention>
1. Fully Closed Step FIG. 5A shows the fully closed state in which the inner surfaces of the fixed clamp 56c and the movable clamp 57j are in contact with each other. Further, since the fixed blade 1 and the movable blade 2 are also fixed in synchronization with the clamps 56 and 57, they are in a fully closed state. This fully closed state is shown in order to facilitate understanding of the operation of both clamps 56 and 57. When the electric wire W is cut, it must be always fully closed as shown in the figure. Absent.

  In this fully closed state, as shown in FIG. 3, the fixed side clamp holder 56a and the fixed blade 1 are fixed to the movable blade side link 32 and the fixed blade side link 31, respectively. There is no relative movement between the two members. However, since the base end portions of the fixed blade side link 31 and the movable blade side link 32 are pin-coupled to each of the pair of link holders 4c and 4c, the entire clamp unit 50 is removed when the electric wire W is cut. The link holder 4c, 4c is used as a fulcrum, and it moves slightly. Such an exercise is the same in the subsequent steps.

  Therefore, in order to bring the fixed side clamp 56c and the movable side clamp 57j into the fully closed state as shown in FIG. 3, the operator first moves the connecting shaft 3 with an appropriate external power or manually as shown by the solid line in FIG. Rotate clockwise.

  When the ball screw 5 is a right-hand screw, the ball nut 6 is lowered, and the movable blade lifting rod 8 integrated therewith is similarly lowered in the direction of the solid line in the figure.

  When the movable blade raising / lowering rod 8 is lowered in the direction of the solid line in the drawing, the movable blade driving pin 21 connected to the pin is pulled in the clockwise direction when the base end portion of the movable-side clamp drive lever 54 is viewed from above. The side clamp drive lever 54 rotates in the clockwise direction in the direction of the arrow with respect to the pivot hole 54d.

  When the movable clamp drive lever 54 rotates clockwise, the movable blade side connecting arm 53b integrated with the movable clamp drive lever 54 also rotates clockwise in the direction of the arrow in FIG. As described above, since the movable blade side connecting arm 53 is integrated with the movable side clamp holder 57c via the movable blade side clamp holder 57a, the movable side clamp holder 57c is connected to the fixed blade side clamp holder 57a and the compression coil. The fixed blade side clamp 56 is rotated clockwise in the direction of the arrow through the spring 57f.

  When the inner surface of the movable blade clamp 57j comes into contact with the inner surface of the stationary blade clamp 56c that is stationary, the biasing force of the compression coil springs 56b and 57f starts to work, and both the clamps 56c and 57j are fully closed. Further, when the rotation of the connecting shaft 3 in the clockwise direction is continued, the urging force of the compression coil spring 57f against the movable clamp 57j increases, while the equal reaction force from the fixed clamp 56c is also exerted via the compression coil spring 56b. In addition, the pressure between the clamps 56c and 57j gradually increases.

2. Fully Opening Process To fully open the movable clamp 57j with respect to the fixed clamp 56c, an operation opposite to the above-described fully closing process may be performed. That is, by rotating the connecting shaft 3 in the counterclockwise direction opposite to that in FIG. 3 and rotating the movable blade side connecting arm 53 in the counterclockwise direction, the movable blade side integrated with the connecting blade 3 is rotated. Similarly, the clamp holders 57a and 57c are also rotated counterclockwise to open the movable clamp 57j with respect to the fixed clamp 56c.

  The state shown in FIG. 5B is a state where the clamps 56c and 57j are fully opened in this way.

3. Wire cutting positioning step To cut the wire W, an appropriate mark is attached to the cutting position of the wire W to be cut.

  After marking the cutting position, the gap between both the clamps 56c and 57j is opened beyond the outer diameter of the electric wire W, and the electric wire W is gripped as shown in FIG.

  On the other hand, when there is already a cut end of the electric wire W at one end and the extra length is cut at a fixed length from the close end, the cut end from the clamp length detection windows 56m and 57m of both clamps 56c and 57j. Are aligned with the scale lines 56n and 57n at positions having the length to be cut.

4). Wire clamp (gripping) step Next, when the cutting position is determined, as shown in FIG. 5 (b), the wire W is held by the clamps 56c and 57j by the above-described operation, and the wire W does not escape during cutting. The urging force of the compression coil spring 57f is applied to the movable blade side clamp 57, and the electric wire W is clamped with an optimum clamping force. At this time, the fixed blade 1 is at the same position as the fixed blade side clamp 56, and the movable blade 2 rotates in synchronization with the movable blade side clamp 57. Therefore, when the clamping by both the clamps 56c and 57j is completed, the electric wire W The fixed blade 1 and the movable blade 2 are in contact with the outer periphery of the blade.

5. Electric wire cutting step Further, when the rotation of the connecting shaft 3 is continued and the rotation angle of the movable blade side clamp 57 holder is increased, cutting by the fixed blade 1 and the movable blade 2 is started.

  Here, when the cutting of the electric wire W by both the blades 1 and 2 progresses, the reaction force from the electric wire W also increases, but via the compression coil spring 57 f from the movable blade side clamp 57 that rotates in synchronization with the movable blade 2. Since the urging force increases, the clamping force for the electric wire W also increases.

  In this case, as described above, if the arm length ratio (L1 / L2) of the movable side clamp drive lever 54 is set to 1 or more, it is clamped with a larger clamping force than before due to the principle of “lever”. Can be cut.

<Effect of the invention>
According to the electric wire cutting tool 100 with a clamp mechanism of the present embodiment, the following excellent effects can be obtained.

  1. The cutting tool 100 of the present invention is provided with a clamp unit 50 that opens and closes in synchronization with the movement of the movable blade 2 at a position that is separated from the pair of movable blades 2 by a certain distance. Accordingly, the movable blade 2 is driven by the movable blade raising / lowering rod 8 independently of the opening / closing action of the movable blade 2, so that the gripping point of the electric wire W from the movable blade 2 is at least the thickness of the movable blade side link 32 ( The symbol t) in FIGS. That is, since the position from the cutting point by the fixed blade 1 and the movable blade 2 to the grip of the electric wire W becomes far by the plate thickness, the gripping force of the clamp unit 50 with respect to the electric wire W is improved, and the cutting operation of the movable blade 2 is performed. Until this is completed, the electric wire W can be held firmly.

  Therefore, even if it is a large diameter electric wire, an electric wire can be clamped reliably and can be cut | disconnected easily.

  2. As described above, as a result of the gripping force of the clamp unit 50 with respect to the electric wire W being larger than the cutting force, the electric wire W that has been cut after the electric wire W is cut is securely gripped without falling off the clamp.

  3. Since the clamp length detection windows 56m and 57m and the scale lines 56n and 57n are provided in the axial direction of the fixed clamp 56c and the movable clamp 67j, the electric wire W to be cut and the movable blade 2 are prepared as preparatory work before the electric wire is cut. The relative position of the wire W can be visually checked, and the cutting position of the electric wire W can be surely cut without error, and the labor can be saved in the dimension setting at the time of cutting work.

[Embodiment 2]
The cutting tool 100 of the first embodiment described above is of a type in which the clamp unit 50 is fixed to one side (right side or left side) of the pair of movable blades 2, but the cutting tool 200 of the second embodiment is The clamp unit 50 is of a type that can be attached to and detached from either side of the movable blade 2, and will be described with reference to FIGS. However, in the following description, only a part different in configuration from the cutting tool 100 of the first embodiment will be described, and the same members as those of the first embodiment will be denoted by the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

  6 is a front view of an embodiment of a clamp detachable wire cutting tool 200 according to the present invention, FIG. 7 is a right side view of the wire cutting tool 200 of FIG. 6, and FIG. 8 is a wire cutting tool 200 of FIG. FIG. 9 is an exploded perspective view of the clamp unit 50A in the wire cutting tool 200 of FIG.

  As shown in FIGS. 6 and 7, the basic configuration of the clamp detachable electric wire cutting tool 200 according to the present invention is the same as the cutting tool 100 of the first embodiment described above. That is, the point provided with the fixed blade 1, the movable blade 2, the cutting main body part 10, the link part 30, and the clamp unit 50A is the same, but the difference is that the clamp unit 50A is the front of the main body part (FIG. 1). On the other hand, it can be attached to either the left or right side.

  The attachment / detachment structure of the clamp unit 50A will be described with reference to FIG. 6, FIG. 8, and FIG.

  6 and 8, the fulcrum bolt 35A is different from the fulcrum bolt 35 of the first embodiment in that the male screw portion 35b has a length that allows the fixing knob 59A of the clamp unit 50A to be screwed and fixed outside the head of the hexagon bolt. Have

  Further, female screw holes 60a and 60a for fixing a clamp unit locking socket 60 for locking the entire clamp unit 50A at the distal ends of the fixed blade side link 31 and the movable blade side link 32 (FIG. 8). As shown in the drawing, the clamp unit locking socket 60 has a male threaded portion 60b at the base end and the distal end portions of the fixed blade side connecting arm 52 and the movable blade side connecting arm 53 as shown in the drawing. The base end portion is a cylindrical cavity 60c having a removable inner diameter.

  In the second embodiment, as shown in FIG. 8, the fixed blade side connecting arm 52A and the movable blade side connecting arm 53A are fixed to the fixed blade side clamp holder 56a and the movable blade side clamp holder 57c, respectively. Has been.

  However, the fixed blade side connecting arm 52A and the movable blade side connecting arm 53A of the second embodiment are different from those of the first embodiment, and any of the connecting arms 52A, 52A, The base end portion of 53A is not provided with a retaining ring groove, and is formed as a simple rod-like body having an outer diameter that can be attached to and detached from the cavity 60c of the socket 60. As for the movable blade side clamp holder 57c of the second embodiment, the movable blade side clamp holder 57c and the movable blade side clamp holder 57a are integrally formed by screws 57d as described in FIG. However, the second embodiment is combined into one as shown in FIG. The fulcrum bolt 35A is also of the double screw 35a, 35b type as shown in FIG. Further, the movable blade side clamp drive levers 54A and 54B are also changed to one of the sides.

  Therefore, in the cutting tool 200 of the second embodiment, the entire clamp unit 50A is inserted into the male screw portion 35a or 35b of the fulcrum bolt 35A on the desired side, and then tightened and fixed to the male screw portion 35a with the hexagon nut 61. The base end portions of the fixed blade side connecting arm 52 and the movable blade side connecting arm 53 are inserted into one of the sockets 60 while the fixing knob 59A is screwed into the male thread portion 35a or 35b of the fulcrum bolt 35A. Therefore, it can be attached and detached.

  In the figure, the sockets 60 and 60 and the movable blade side clamp drive levers 54A and 54B are shown on both sides of the cutting main body 10 in order to clearly show the replacement position. Either one is selected.

  In addition, the codes | symbols 62 and 63 of FIG. 9 are protective covers.

  Therefore, the cutting tool 200 according to the second embodiment can obtain the effects and effects of the invention according to the cutting tool 100 according to the first embodiment. Accordingly, the clamp unit 50A can be mounted on both the left and right sides of the cutting main body 10 desired by the operator in a short time, and an exceptional effect can be obtained that the wire cutting operation can be performed.

Claims (4)

A fixed blade having a blade surface at the tip, and a movable blade for cutting an electric wire by a blade surface opened and closed with respect to the fixed blade;
A plate-like fixed blade side link for fixing the fixed blade to the side surface and a plate-like movable side link adjacent to the side surface of the movable blade via a gap;
A fulcrum bolt that is near the blade surface of the fixed blade and the movable blade and pivots about these members through a substantially upper position than the center portion of the fixed blade side link and the movable side link;
Movable blade drive means for opening and closing the blade surface of the movable blade with respect to the blade surface of the fixed blade by rotating the other end of the movable blade around the fulcrum bolt;
A clamp unit that is pivotally supported by the fulcrum bolt and includes a fixed blade side clamp and a movable blade side clamp for sandwiching the electric wire by opening and closing in synchronization with each of the fixed blade and the movable blade. ,
The entire clamp unit is located on the side separated by a distance corresponding to at least the plate thickness of the movable side link, and
Is interposed between the base end of the movable blade and the movable blade drive means, besides, by the pivoted movable blade-side clamp drive lever with the fulcrum bolt, characterized in that the movable blade-side clamp is opened and closed Wire cutting tool with clamp mechanism. A fixed blade having a blade surface at the tip, and a movable blade for cutting an electric wire by a blade surface opened and closed with respect to the fixed blade;
A plate-like fixed blade side link for fixing the fixed blade to the side surface and a plate-like movable side link adjacent to the side surface of the movable blade via a gap;
A fulcrum bolt that is near the blade surface of the fixed blade and the movable blade and pivots about these members through a substantially upper position than the center portion of the fixed blade side link and the movable side link;
Movable blade drive means for opening and closing the blade surface of the movable blade with respect to the blade surface of the fixed blade by rotating the other end of the movable blade around the fulcrum bolt;
A clamp unit that is pivotally supported by the fulcrum bolt and includes a fixed blade side clamp and a movable blade side clamp for sandwiching the electric wire by opening and closing in synchronization with each of the fixed blade and the movable blade. ,
The entire clamp unit is located on the side separated by a distance corresponding to at least the plate thickness of the movable side link, and
Wherein the movable blade drive means is interposed between the base end portion of the movable blade, besides, by the pivoted movable blade-side clamp drive lever with the fulcrum bolt, the movable blade-side clamp is opened and closed,
Furthermore, the fulcrum bolt has a male thread portion with a length protruding from the outer surface of each of the fixed blade side link and the movable blade link,
By fixing a socket for engaging and disengaging the fixed blade side clamp of the clamp unit on the outer surface of each of the fixed blade side link and the movable blade link and in the vicinity of the tip thereof, the clamp unit An electric wire cutting tool with a clamp mechanism, wherein the whole is detachable from the right or left desired side of the two blades. In the wire cutting tool with a clamp mechanism according to claim 1 or 2,
The clamp unit is a wire cutting tool with a clamp mechanism, characterized in that a fixed blade side clamp and / or a movable blade side clamp is provided with a window through which an extra length of the electric wire can be visually recognized. In the electric wire cutting tool with a clamp mechanism according to claim 3,
An electric wire cutting tool with a clamp mechanism, wherein a mark capable of measuring the length of the extra length portion of the electric wire is further provided in the vicinity of the window where the extra length portion of the electric wire is visible.

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