JP5801739B2 - Remote control cutter - Google Patents

Description

  The present invention relates to a remote operation cutter for cutting an electric wire or the like installed at a high place by an operation using a remote operation rod.

  In broadcast communication facilities, telecommunications facilities, etc., work for replacing installed wires is often performed on an aerial work vehicle or on a utility pole.

  In this case, a tool is assembled and used at the tip of a remote control rod made of an insulating member in order to prevent interference with a high voltage portion such as an electric wire during work and protect the body from electric shock. Of the tools used for such conventional remote control, a remote control type compression pliers is shown in FIG.

  In the remote control type compression pliers 100 shown in FIG. 9, a screw shaft 104 is extended on the upper end side of the remote control rod 102. A screw groove 104a is formed on the upper side of the screw shaft 104, and a screw groove 104b in the opposite direction to the screw groove 104a is formed on the lower side. And nut body 104c, 104d is attached to these two types of thread groove 104a, 104b part so that advancing and retreating, respectively. Further, the tip ends of a pair of handle portions 108 of the pliers body 106 are rotatably connected to the two upper and lower nut bodies 104c and 104d. With such a structure, when the rotating portion 102a of the remote control rod 102 is rotated, the two nut bodies 104c and 104d move toward and away from each other, and the pliers body 106 is opened and closed. Thereby, it is possible to perform clamping operation from a remote position, without touching an electric wire etc. directly. Such a configuration is disclosed in Patent Document 1.

  Here, when it is necessary to cut the wire in the replacement work of the installed wire, the pliers body part of the remote-operated compression pliers shown in FIG. 9 described above is replaced with a pliers-type cutter. Can also be supported.

JP 2000-166038 A

  However, work on utility poles with an unnatural posture is dangerous and may cause serious accidents such as falling or falling during work. For this reason, in order to ensure the safety of workers, it is desirable to use an aerial work vehicle with a stable scaffold as much as possible.

  However, there are mountainous areas, steep slopes in residential areas, agricultural land, narrow roads, etc. in the places where electric wires are installed. In these places, it is difficult to enter a work vehicle at a high altitude. You may have to do that.

  On the other hand, in order to avoid work on a dangerous power pole, a method of extending the remote control rod and performing work from the ground can be considered. For example, in the case of the remote control type compression pliers 100 as shown in FIG. And the two remote bars composed of the support portion, the longer the overall length, the higher the weight.

In other words, when the distance to the erected cable is relatively short, such as when working from a utility pole or a work vehicle at a high altitude, the altitude above 2m above the ground may be used, even if it is not heavy enough to hinder work. On the other hand, if the remote control rod is made long enough to be accessible from the ground, the weight will increase significantly, and it may be difficult to work alone.

  In remote operation, keeping the weight of the tool as small as possible enables accurate and safe work, and further accurate work leads to shortening of work time, thus reducing the burden on the operator. It is possible to contribute to the prevention of accidents.

  Accordingly, in order to solve the above-described problems, the present invention provides a remote operation cutter that can stabilize work on an electric wire in a high place and improve work efficiency with a simple configuration that suppresses an increase in weight. For the purpose.

  In order to achieve the above object, a remote operation cutter according to the present invention is a remote operation cutter that cuts an electric wire installed at a high place, and is integrated with a remote operation rod that extends vertically and is connected to a lower end. A shaft body that rotates about the shaft center, an axial direction on the shaft body, and at least one of the two connection bodies that moves up and down on the shaft body by following the shaft rotation of the remote control rod, and two connections The pliers-type cutter unit, in which one of the pair of handle parts is swingably connected to the body, and the height and the protruding width substantially coincide with the intersection of the upper and lower blades of the cutter unit. And a wire contact portion provided so as to be able to move integrally with the cutter portion at a predetermined interval in the side surface direction orthogonal to the height direction and the protruding direction.

  In addition to the above configuration, the remote operation cutter of the present invention extends to the protruding side of the cutter unit so as to be continuous with the blade edge of the upper blade in a side view from the side direction, and can move integrally with the cutter unit. An upper guide portion provided is provided.

  In addition to the above configuration, the remote operation cutter of the present invention is arranged to face the lower side of the upper guide part via the electric wire contact part so as to be able to move integrally with the cutter part, and can accommodate the electric wire. The lower guide part is formed, and at least one of the upper guide part and the lower guide part is provided with an obstruction part that can block the movement of the electric wire to the outside of the electric wire receiving area. To do.

  In addition to the above configuration, the remote operation cutter according to the present invention includes a shaft body that is a screw shaft in which a thread groove is formed, and one of the coupling bodies is a nut body that can be screwed back and forth on the screw shaft. The other of the coupling bodies is mounted on the screw shaft in a loose fitting state in which movement in the axial direction is restricted.

  As described above, according to the present invention, when the electric wire comes into contact with the intersecting portion of the upper blade and the lower blade of the cutter portion, the intersecting portion and the electric wire contacting portion whose height and the protruding width substantially coincide with each other. At the same time, the contact state is established. Further, as the cutting progresses, even if the height position and the protruding position of the intersecting portion change, the height and the protruding width of the wire contact portion also change similarly.

  As a result, the remote operation cutter is in contact with a plurality of locations in the direction perpendicular to the axis at the time of cutting, so that it can be prevented from rotating with the rotation of the remote operation rod, and the cutting operation can be stably performed in a good state. It becomes possible.

Moreover, according to this invention, the electric wire guide | induced to the electric wire contact part side along the upper side guide part extended in the protrusion direction can move to an upper blade smoothly. Moreover, since the upper guide part and the upper blade are provided integrally, the continuity between the upper guide part and the upper blade is not lost even if the opening degree of the cutter part changes.

  Thereby, even if the opening degree of a cutter part exists in any state which can pass an electric wire, since an electric wire is reliably and easily guide | induced to the electric wire contact part side, working efficiency improves.

  In addition, according to the present invention, since the lower guide portion is arranged to face the upper guide portion, when the electric wire is put into the electric wire housing area, even if the upper guide portion and the electric wire are separated, Can be received by the lower guide.

  As a result, even if the vertical position of the remote operation cutter varies due to the remote operation, the electric wire that has entered the electric wire receiving area is stably placed between either the upper guide portion or the lower guide portion. Since it is held, the operability is further improved.

  According to the present invention, the handle portion on one side of the cutter portion opens / closes (lifts / lowers) by the feed screw mechanism including the screw shaft and the nut body.

  Thereby, since only one nut body slides on the screw shaft, sliding friction (rotational friction at the time of shaft rotation) can be reduced, and the burden on the operator in the cutting operation can be reduced. .

It is a whole perspective view of the cutter for remote control concerning a 1st embodiment of the present invention. It is a whole perspective view of the cutter for remote control of Drawing 1 in a closed state. It is the side view which showed the hook part periphery of the cutter for remote control of FIG. 1 at the time of accommodating an electric wire. It is the top view which showed the mode at the time of carrying out shaft rotation operation of the cutter for remote control of FIG. 1 with a remote control stick | rod. FIG. 2 shows before and after cutting operation by the remote operation cutter of FIG. 1, (a) shows before wire cutting, and (b) is a side view after wire cutting. It is a whole perspective view of the cutter for remote control concerning a 2nd embodiment of the present invention. It is the perspective view which showed the lock part periphery of the cutter for remote control which concerns on the 3rd Embodiment of this invention. FIG. 7 shows a state around the lock portion of FIG. 7, (a) shows a state when the electric wire is pushed into the inside of the electric wire housing area, and (b) shows a state when the electric wire goes out from the inside of the electric wire housing area. FIG. It is the figure which showed the conventional remote control type compression pliers.

(First embodiment)
FIG. 1 shows an overall perspective view of a remote operation cutter according to the present embodiment. FIG. 2 is an overall perspective view of the remote operation cutter of FIG. 1 in the closed state.

  The remote operation cutter 1 has a connection portion 3 to which a remote operation rod 2 (portion represented by a dotted line in the figure) can be connected at the lower end.

  A screw shaft 4 (shaft body) having a thread groove formed on the outer periphery is extended above the connection portion 3. Further, since the connecting portion 3 is fixed to the remote control rod 2, the remote control rod 2 that is operated to rotate the shaft, the connecting portion 3, and the screw shaft 4 are integrally rotated.

A nut body 6 is mounted on the screw shaft 4 so as to be able to advance and retract. The nut body 6
Is pivotally supported by a handle portion 8f, which will be described later, and its rotation is restricted. Thereby, the nut body 6 moves up and down along the screw shaft 4 by rotating the remote control rod 2.

  In the remote operation cutter 1 according to the present embodiment, a pliers-type cutter unit 8 is provided. Of the upper blade side half body 8c and the lower blade side half body 8d constituting the cutter unit 8, the lower blade side half body A handle portion 8f of 8d is rotatably connected to the nut body 6 (connector).

  Further, the handle portion 8e (shown in FIG. 2) of the upper blade side half 8c is rotatably connected to a connecting portion 7 provided between the screw shaft 4 and the connecting portion 3. . This connecting portion 7 is not screwed into the thread groove of the screw shaft 4 like the nut body 6, and is provided in a loosely fitted state in which the movement in the axial direction is restricted. Even if the rod 2 is axially rotated, the rod 2 does not rotate integrally and is arranged so as to maintain the same height.

  For this reason, when the remote control rod 2 is rotated about the axis, only the handle 8f above the cutter unit 8 is raised and lowered to open and close the cutter unit 8.

  Hook portions 10 are provided on both sides of the cutter portion 8 in the horizontal direction. The hook portions 10 and the cutter portions 8 on both sides are arranged with a predetermined interval in the horizontal direction via spacers 14a extending substantially horizontally. Since this spacer 14a is attached to the upper blade side half 8c side of the cutter portion 8, when the nut body 6 moves up and down, the hook portion 10 moves integrally with the upper blade side half 8c.

  Next, the shape of this hook part 10 is demonstrated.

  The hook portion 10 has an approximately U-shape that opens in the direction of the arrow 34 that is the direction in which the upper blade 8a and the lower blade 8b of the cutter portion 8 protrude, that is, the direction in which the blade side protrudes when the nut body 6 is lowered. The notch 11 is formed. The U-shaped notch 11 serves as a guide for guiding the electric wire to the cutter unit 8 and is also an electric wire housing area for housing the electric wire.

  FIG. 3 is a view seen from the side surface direction perpendicular to both the protruding direction of the cutter portion 8 indicated by the arrow 34 in FIG. 2 and the longitudinal direction of the screw shaft 4 indicated by the arrow 32, in other words, cut. It is the side view seen from the direction where an electric wire is extended.

  As shown in FIG. 3, the hook portion 10 that is integrally attached to the upper blade side half 8c via a spacer 14a (shown in FIGS. 2 and 4) is provided on the lower side of the upper guide portion 10b. The curved line and the cutting edge of the upper blade 8a are aligned so as to be continuous in a side view.

  Thereby, when the electric wire 30 is hooked on the tip of the upper guide portion 10b protruding in the direction of the arrow 34, the electric wire 30 is slidably moved along the lower curved line to guide the electric wire 30 to the back side of the notch 11. it can. And the electric wire 30 is settled between the upper blade 8a and the lower blade 8b of the cutter part 8 along the blade edge of the upper blade 8a which continues with this curve line and smooth inclination in the side view of FIG.

  The upper guide portion 10b and the lower guide portion 10c form a wire contact portion 10a continuously in a U shape. As is apparent from the side view of FIG. 3, the wire contact portion 10 a is in the height direction with respect to the intersecting portion 8 g where the upper blade 8 a and the lower blade 8 b constituting the blade portion of the cutter portion 8 intersect. In addition, since the position with respect to the protruding direction (arrow 34) is substantially coincident, when the electric wire 30 is accommodated in the blade portion, the side surface of the electric wire 30 is also in contact with the electric wire contact portion 10a. Become.

Next, the lock portion 12 provided near the opening of the notch 11 of the hook portion 10 will be described. In the remote operation cutter 1 according to the present embodiment, the lock portion 12 is swingably attached to the lower guide portion 10c forming the hook portion 10. Here, the lock portion 12 is attached so as to be able to swing only in the inner direction of the notch 11, and biasing is applied in the outer direction.

  FIG. 3 shows a state in which the electric wire 30 passes through the lock portion 12. As shown in FIG. 3, the electric wire 30 moves while sliding toward the inside of the notch 11 along the curved line inside the upper guide portion 10b. At this time, the lock portion 12 provided in the vicinity of the opening of the notch 11 of the lower guide portion 10c falls inward and allows the electric wire 30 to move inward. And since the lock | rock part 12 is urged | biased toward the outer side, it returns to the original position, after the electric wire 30 passes. In this way, the electric wire 30 received in the notch 11 settles at the position of the intersecting portion 8g where the upper blade side half body 8c and the lower blade side half body 8d (see FIG. 1) intersect. The lock portion 12 can be guided into the notch 11 so as to press the electric wire 30 from the outside against the urging force, but once the lock portion 12 is received in the notch 11, Lock to restrict movement to.

  Since the lock portion 12 having such a configuration is attached to each of the hook portions 10 provided on both sides of the cutter portion 8, electric wires are provided in the blade portions (upper blade 8a and lower blade 8b) of the cutter portion 8. When 30 is accommodated, the electric wires 30 are stably held between the electric wire contact portion 10a and the lock portion 12 in the hook portions 10 on both sides. Hereinafter, this state is referred to as an electric wire set state.

  When the electric wire 30 is in the set state with respect to the remote operation cutter 1 configured as described above, when the remote operation rod 2 is rotated, the screw shaft 4 is rotated together with the connecting portion 3.

  If this axial rotation direction is the descending direction of the nut body 6, the handle 8f on the upper side of the cutter section 8 descends together with the nut body 6 (see the nut body 6 in FIG. 2 and the nut body 6 in FIG. 1). .

  Here, in the remote operation cutter 1 in the present embodiment, the remote operation by the support and the shaft rotation is performed by the single remote operation rod 2. For this reason, when rotating the remote control rod 2, if the electric wire 30 is not in the set state, there is nothing to prevent the movement, so the remote operation cutter 1 connected to the upper end is connected to the remote control rod 2. To go around. However, as described above, when the electric wire 30 is in the set state on the hook portion 10, the posture is stably held by the electric wire contact portion 10a, the lock portion 12, and the intersecting portion 8g. No turn of 1 occurs.

  A state seen from above is shown in FIG. FIG. 4 is a plan view looking down from above the remote operation cutter 1 in a state where the electric wire 30 is set in the hook portion 10. An electric wire is held between the upper blade side half body 8c and the lower blade side half body 8d of the cutter portion 8, and inside the notch 11 of the hook portion 10 on both sides in the horizontal direction. The electric wire 30 is accommodated in. In FIG. 4, the outer shape of the remote operation cutter 1 when the remote operation rod 2 is rotated is indicated by a two-dot chain line. As can be seen from FIG. 4, when the remote control rod 2 is rotated in the direction of the arrow 38 that is counterclockwise on the paper surface, the remote control cutter 1 also tries to rotate. However, the electric wire 30 housed in the hook portion 10 is locked by the lock portion 12 and is in contact with the electric wire contact portion 10a side. Therefore, in FIG. 4, the lock portion 12 at the position C blocks the outward movement of the electric wire 30, and the electric wire contact portion 10 a (see FIG. 3) is in contact with the electric wire 30 at the position B. is there. Thus, although the remote operation cutter 1 tries to rotate with respect to the shaft rotation of the remote operation rod 2, it is blocked by the lock portion 12 and the electric wire contact portion 10a, and is slightly inclined, but has almost the original posture. I keep it. Therefore, since the electric wire 30 that is accommodated in the cutter unit 8 is not detached from between the upper blade 8a and the lower blade 8b, the cutter unit 8 can stably shift to the closed state (cut state) in this state. It becomes.

  In the present embodiment, as shown in FIG. 4, the hook portions 10 on both sides with respect to the position of the cutter portion 8 are disposed at an asymmetric distance. That is, the spacer 14a is set to be longer than the spacer 14b. The nut body 6 that moves on the screw shaft 4 is connected to the cutter portion 8 from the side where the spacer 14a is provided (the lower side of the drawing). Therefore, when the remote control rod 2 is axially rotated in the direction of the arrow 38, the direction in which the upper part 8a and the lower part 8b of the cutter part 8 shown in FIG. Rotational force is transmitted to For this reason, it becomes possible to stabilize in the state which pressed the electric wire 30 to the cross | intersection part 8g side.

  Subsequently, the wire retracting portion 10d formed in the vicinity of the periphery of the notch 11 of the hook portion 10 shown in FIG. 1 where the upper guide portion 10b is connected to the wire contact portion 10a will be described with reference to FIG. .

  FIG. 5 shows a state after the electric wire 30 is set on the crossing portion 8g side of the cutter unit 8 until it is cut, (a) before cutting the electric wire, (b) when cutting the electric wire. Indicates the state. When the remote control rod 2 is pivoted, the crossing portion 8g of the cutter portion 8 is pressed against the electric wire 30 and the nut body 6 is lowered on the screw shaft 4 as described with reference to the plan view of FIG. . And the space | interval of the upper blade 8a and the lower blade 8b becomes narrow gradually, and it cut | disconnects finally. At this time, as shown in FIG. 5B, the region on the upper half side of the electric wire 30 is accommodated in the electric wire retracting portion 10d.

  That is, since the lower blade 8b can move independently of the hook portion 10, when the cutting operation of the electric wire 30 proceeds, a part of the lower portion of the cut electric wire 30 is lower than the cutting edge of the lower blade 8b. It is possible to escape to the side. Compared to this, the upper blade 8 a is fixed integrally with the hook portion 10. In addition, the curved line inside the upper guide portion 10b and the cutting edge of the upper blade 8a are arranged close to each other so as to be smoothly continuous in a side view. For this reason, the upper part of the electric wire 30 that has been cut and raised above the cutting edge of the upper blade 8a interferes with the curved line inside the upper guide portion 10b.

  Therefore, in the embodiment of the present invention, the wire retracting portion 10d is formed in order to allow the upper portion of the cut electric wire 30 to escape so as not to interfere with the upper guide portion 10b. Here, the cutter part 8 is pressed against the electric wire 30 around the crossing part 8g and is stabilized and cut at this position, so that the electric wire retracting part 10d is formed immediately above the crossing part 8g.

  In the present embodiment, the example in which the two hook members are each formed of a plate-like member has been described, but the plate member may not be used.

  Further, in the present embodiment, the configuration in which the hook portions 10 are provided on both sides of the cutter portion 8 is shown as an example. However, at least when the remote control rod 2 is axially rotated in the direction in which the cutter portion 8 is closed, the electric wire If the abutting portion 10a is provided only on the side that is pressed against the electric wire, it is possible to prevent the rotation.

  Moreover, in this Embodiment, the upper side guide part 10b and the lower side guide part 10c are continuously formed with respect to the electric wire contact part 10a, and the structure by which the curved U-shaped notch 11 was formed is shown as an example. However, at least if the wire contact portion is provided, it is possible to prevent the rotation even if the upper guide portion and the lower guide portion are not provided. Therefore, a configuration in which only the wire contact portion is provided or a configuration in which only one of the upper guide portion and the lower guide portion is provided with respect to the wire contact portion may be employed.

  Further, in the present embodiment, the configuration in which the lock portion 12 is provided in the lower guide portion 10c in the vicinity of the opening of the notch 11 of the hook portion 10 is shown as an example, but the lock portion 12 may be provided in the upper guide portion 10b. good.

  In the present embodiment, a feed screw mechanism composed of the screw shaft 4 and the nut body 6 is employed to move one of the handle portions 8e of the cutter portion 8 up and down in response to the shaft rotation operation of the remote control rod 2. However, the present invention is not limited to this, and a similar effect can be obtained as long as the rotational motion can be converted into a linear motion. For example, a mechanism that converts a twisting operation into a lifting operation, such as a lipstick extrusion mechanism, may be used.

  Further, in the present embodiment, the upper guide portion 10b is shown as an example of a configuration in which the upper guide portion 10b is curved so as to protrude upward, but at least in the side view from the longitudinal direction of the electric wire 30, the upper blade 8a If the edge of the upper guide portion 10b is formed so as to be continuous, the electric wire 30 can be smoothly guided to and stored in the blade portion, and may be formed in a straight line.

(Second Embodiment)
Next, a remote operation cutter according to a second embodiment of the present invention will be described with reference to FIG.

  FIG. 6 shows an overall perspective view of the remote operation cutter 51 in the present embodiment. This remote operation cutter 51 is different from the first embodiment in the component part of the feed screw mechanism composed of the screw shaft 54 and the nut bodies 56a and 56b. The configuration is substantially the same as that of the operation cutter 1. Here, the same members as those in the first embodiment are denoted by the same reference numerals, and different portions will be mainly described.

  As can be seen from FIG. 6, the screw shaft 54 is formed so that the upper screw groove 54 a and the lower screw groove 54 b are in opposite directions. And nut body 56a, 56b is screwed together by these thread grooves 54a, 54b so that raising / lowering is possible. Further, a pair of handle portions 58a and 58b of the cutter portion 58 are rotatably connected to the nut bodies 56a and 56b.

  With such a configuration, when the remote control rod 2 is rotationally operated, the upper and lower nut bodies 56a and 56b move far and away from each other, so that the cutter unit 58 opens and closes. Here, in the present embodiment, both of the pair of handle portions 58a and 58b are moved relatively far by the axial rotation of the remote control rod 2, so that only one side moves up and down as in the first embodiment. Compared with the case where it does, the cutter part 58 can be opened and closed by the half rotation number, the electric wire 30 can be cut | disconnected, and it becomes possible to improve work efficiency.

(Third embodiment)
Next, a remote operation cutter according to a third embodiment of the present invention will be described with reference to FIG.

  In FIG. 7, the periphery of the lock portion 92 is shown enlarged. In the remote operation cutter 71 in the present embodiment, compared to the remote operation cutter 1 shown in FIG. 1 in the first embodiment, the shape of the upper guide portion 80b, the lower guide portion 80c and the lock portion 92 and The configuration is different. Here, the description will be focused on these different parts, and the same parts as those described in the above embodiments will be denoted by the same reference numerals.

Referring to FIG. 7, the internal structure of lock portion 92 is indicated by a dotted line. The lock portion 92 is formed by bending a plate material into a U-shaped cross section in a plan view. The upper end is folded back inward to form a leaf spring 92a (first elastic member). The leaf spring 92a is disposed so that the lower end thereof contacts the outside of the lower guide portion 80c. Thus, in the present embodiment, in order to receive the leaf spring 92a of the lock portion 92, the protruding side (front end side) of the lower guide portion 80c protrudes downward to form a spring receiving portion 80f. Thereby, when the lock portion 92 swings in the protruding side, that is, in the direction of the arrow 95, the lock portion 92 has an elastic repulsive force in contact with the lower guide portion 80c so that the lock portion 92 has an Rotational force in the direction to return to is generated.

  In addition to the leaf spring 92a, the lock portion 92 is also provided with a coil spring 92b (second elastic member). One end of the coil spring 92 b is hooked on the upper surface of the lower guide portion 80 c, and the other end is in contact with the inner surface of the plate spring 92 a inside the lock portion 92. Thereby, when it tries to push down the lock | rock part 92 to the electric wire accommodation area 91 side toward the direction of the arrow 96, the elastic repulsive force of an outward direction arises.

  Here, the elastic repulsive force generated from the leaf spring 92a and the coil spring 92b is set so that the leaf spring 92a is larger. However, in the released state where no external force is applied as shown in the figure, the lock portion 92 is stable at a position that blocks the opening side of the wire accommodating area 91.

  The operation | movement at the time of the electric wire 30 going in / out from the electric wire accommodating area 91 under such a structure is demonstrated using FIG.

  FIG. 8 shows a state of the periphery of the lock portion 92 of FIG. 7 as viewed from the side, (a) shows a state when the electric wire 30 is pushed into the inner side of the electric wire housing area 91, and (b) shows The state when going out from the inside of the electric wire accommodating area 91 to the outside is shown. Further, in order to understand the state of the inside of the lock portion 92, the front side is shown as a partial cross-sectional view with a part cut away.

  As apparent from FIG. 8A, the leaf spring 92a is substantially W-shaped so as not to interfere with the lower guide portion 80c when the lock portion 92 is turned inward of the electric wire housing area 91. Is bent. For this reason, when the electric wire 30 is introduced into the electric wire accommodating area 91, it is only necessary to apply a force against the force of the coil spring 92b having a weaker repulsive force, and the lock portion 92 can be easily tilted inward. Thus, the electric wire 30 can be accommodated smoothly.

  On the other hand, FIG. 8B shows a state in which the accommodated electric wire 30 goes out of the electric wire accommodation area 91, and the lock portion 92 is moved outward by pressing from the electric wire 30. Leaning toward However, unlike the case of FIG. 8A, at this time, a repulsive force is generated from the leaf spring 92a having a higher strength than the coil spring 92b.

  Therefore, the electric wire 30 cannot pass easily like the movement of the electric wire 30 to the inside of the electric wire accommodating area 91, and the electric wire 30 receives a considerable resistance force from the lock portion 92. As described in the first embodiment, since the lock portion 92 is provided, when the cutter portion 88 (see FIG. 7) is closed by a remote operation rod (not shown), it is for remote operation. Even when the entire cutter 71 is rotated, the electric wire 30 comes into contact with the inside of the lock portion 92 to prevent this rotation. That is, in normal use, it is not necessary to take out the electric wire 30 once stored in the electric wire accommodating area 91 to the outside, and it is not preferable that the lock portion 92 is inclined outward. However, there is a case where it is desired to change the cutting position in a state where the electric wire 30 is set in the electric wire housing area 91. In this case, if the lock portion 92 is configured so that it cannot be rotated outward at all, it is necessary to change the cutting position by sliding the wire 30 on the wire 30 while the wire 30 is housed in the wire housing area 91. is there.

In addition, a configuration in which a lock release mechanism is separately provided in the lock unit 92 and can be released by remote operation is conceivable. For this purpose, the cost for adding a new mechanism increases,
The weight also increases, which is disadvantageous for remote operation.

  However, as described above, the lock portion 92 in the present embodiment can generate a sufficient resistance to prevent the rotation, and in the case where the cutting position is to be changed, the lock portion 92 is more than that at the time of cutting. The electric wire 30 can be released by tilting the remote operation cutter 71 or rotating the remote operation rod in the opposite direction so that a large force is generated between the electric wire 30 and the lock portion 92. As a result, the work can be easily corrected, and the overall work efficiency can be greatly improved while the configuration of the lock portion 92 is simple.

  The repulsive force of the leaf spring 92a and the rotation area of the lock portion 92 can be adjusted by the thickness (width) and shape of the leaf spring 92a, and the lower side where the lower side of the leaf spring 92a abuts. It can also be adjusted by changing the position and shape of the spring receiving portion 80f of the guide portion 80c.

  Further, in the remote operation cutter 71 in the present embodiment, when the lock portion 92 is rotated outward and the electric wire 30 is detached from the electric wire accommodating area 91, the interference with the upper guide portion 80b is reduced. The bending portion 80e is formed so as to be substantially equidistant from the rotation center of the lock portion 92. As a result, when a pressing force more than a reaction force generated during normal cutting is applied from the electric wire 30 to the lock portion 92, the lock portion 92 is rotated by a relatively small rotation of the lock portion 92 to the outer side. The space between the tip of the wire and the upper guide portion 80b is widened, and the electric wire 30 can be led out smoothly.

  As described above, in the first and second embodiments, the electric wire accommodated in the electric wire accommodation area (notch) is prevented from detaching to the outside, and the remote operation cutter is prevented from being rotated. In order to achieve this, a configuration in which a lock portion is provided on the lower guide portion so as to be swingable is shown as an example. And this lock | rock part was attached so that a rocking | fluctuation was possible only to the inner side direction of a notch, and urging | biasing was given to the outer side. However, the present invention is not limited to such a configuration, and at least a configuration in which the lock mechanism works when the remote control rod is pivoted may be used.

  Specifically, before rotating the remote control rod, it is possible to swing both inside and outside the notch, and simultaneously rotating the remote control rod to start cutting, A configuration in which a lock mechanism is operated in conjunction with this rotation may be employed. If comprised in this way, the installation position with respect to an electric wire can be changed smoothly, and when performing a cutting | disconnection operation | work, it is possible to obtain the effect of a rotation stop by a locking effect | action. In addition, the lock state and the release state can be switched without using a separate member or separate equipment, which is advantageous for remote operation.

  Moreover, in the said 2nd Embodiment, the structure which the two nut bodies 56a and 56b move relatively in the up-and-down direction is shown as an example, and in the 1st Embodiment, only the upper side of the screw shaft is shown. The structure provided with the nut body is shown as an example. However, the present invention is not limited to this, and the nut body is provided such that the upper handle portion is fixed so as to be swingable and the lower handle portion is provided so as to be capable of screwing back and forth with respect to the screw shaft. You may be the structure connected to. In the configuration in which the two nut bodies move relatively, the cutter unit can be opened and closed with a small number of revolutions, while the one nut body is moved up and down to open and close only the handle portion on one side. Then, the sliding friction can be reduced to half, so that it can be easily operated with a small force.

Furthermore, in the third embodiment, a coil spring 92b is used to generate an elastic resistance against the inward rotation of the lock portion 92, and conversely, a leaf spring is used for the outward rotation. 92a was used. However, the present invention is not limited to this, and an elastic member such as rubber may be used as long as the rotational resistance toward the outer side can be set larger. Further, when the leaf spring 92a is not employed, it is not necessary to form the spring receiving portion 80f as the contact portion in the lower guide portion 80c.

  Further, in the configuration shown in the third embodiment, if the spring force of the leaf spring 92a is set so that the electric wire 30 can be retracted without passing the curved portion 80e in the upper guide portion 80b. Similarly, it is possible to correct the cutting position.

1, 51, 71 Remote operation cutter 2 Remote operation rod 3 Connection portion 4, 54 Screw shaft (shaft body)
6, 56a, 56b Nut body (connecting body)
7 Connecting part (connecting body)
8, 58 Cutter portion 8a Upper blade 8b Lower blade 8c Upper blade side half 8d Lower blade side half 8e, 8f, 58a, 58b Handle portion 8f Handle portion 8g Crossing portion 10 Hook portion 10a Electric wire contact portion 10b, 80b Upper side Guide portion 10c, 80c Lower guide portion 10d Electric wire retracting portion 11, 91 Notch (electric wire accommodating area)
12, 92 Lock part (blocking part)
30 Electric wire 32 Longitudinal direction 34 Direction of protrusion

Claims (4)

It is a cutter for remote control that cuts electric wires installed in high places,
A shaft that extends up and down and rotates about the axis integrally with a remote control rod connected to the lower end;
Two connected bodies that are arranged side by side in the axial direction on the shaft body, at least one of which is moved up and down on the shaft body by following the shaft rotation of the remote control rod;
A pliers-type cutter unit in which any one of a pair of handle parts is connected to the two coupling bodies so as to be swingable;
With respect to the intersection of the upper blade and the lower blade of the cutter part, the height and the protruding width are substantially matched, and a predetermined interval is provided in the side direction perpendicular to the height direction and the protruding direction, An electric wire contact portion provided so as to be capable of moving integrally with the cutter portion;
This is a remote control cutter.   In the side view from the side surface direction, the upper guide portion is provided to extend toward the protruding side of the cutter portion so as to be continuous with the cutting edge of the upper blade, and is provided so as to be able to move integrally with the cutter portion. The remote operation cutter according to claim 1. A lower guide portion that is disposed to face the lower side of the upper guide portion via the electric wire abutting portion so as to be able to move integrally with the cutter portion, and forms an electric wire accommodation area that can accommodate the electric wire,
The obstruction part which can interrupt the movement of the said electric wire to the outward of the said electric wire accommodation area was provided in at least one of the said upper side guide part and the said lower side guide part, The Claim 2 characterized by the above-mentioned. Remote control cutter. The shaft body is a screw shaft in which a thread groove is formed,
One of the coupling bodies is a nut body provided on the screw shaft so as to be able to advance and retract,
The remote operation cutter according to any one of claims 1 to 3, wherein the other of the coupling bodies is mounted on the screw shaft in a loose fitting state in which movement in the axial direction is restricted. .