JPH028651Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a cutting tool that is attached to the tip of a tool called a rotary stake and is used to cut live overhead distribution lines, binding wires, connector covers, etc. It is something.

(Prior art) This type of conventional cutting work utilizes the principle of levers to attach a scissor-shaped cutter member to the tip of a long rod or wire, and manually operate the rod or wire to cut an overhead electric wire. They were doing cutting work such as.

(Problem that the invention aims to solve) However, with such tools, the same cutting motion as the blade at the tip must be performed at hand via a long rod, etc., which makes it difficult to work smoothly. is difficult and requires skill. Moreover, because the same motion as the operating motion at hand was transmitted directly to the blade via a long rod, it was difficult to apply force and the cutting force was weak.

(Means for solving the problem) Therefore, this invention is called a rotary stake, which is attached to the tip of a tool that has a rotating shaft inside, and converts the rotational motion of this rotating shaft into cutting motion via a so-called double link mechanism. The problem was solved by using a cutter tool that performs the cutting operation.

As for its specific configuration, a rotation transmission shaft that interlocks with the rotation shaft of the rotary stake is rotatably held in a cylindrical holding member at one end, and a rotation transmission shaft that interlocks with the rotational shaft of the rotary stake is rotatably held in a cylindrical holding member. Two opposing arm members are made to protrude, one end of a nut member that is slidable in the axial direction between the arm members and does not rotate itself is screwed together with the other end of the rotation transmission shaft, and further two link arms are provided. is rotatably fixed to the other end of the nut member, and a pair of scissor-shaped cutting members are rotatably fixed to the tip of the arm member at the shaft portion that is the fulcrum of the scissors. The above-mentioned two link arms and the handle of the cutting member are linked by pinning so that they can rotate freely, and then the holding member is made to be able to be attached to and detached from the rotary stick. be.

(Function) The rotation of the rotation shaft of the rotary stick rotates the rotation transmission shaft, and the nut member screwed onto the tip of the rotation shaft slides in the axial direction. At this time, two link arms are rotatably fixed to the other end of this nut member, while a pair of scissor-shaped cutting members are located between the tips of the arm members protruding from the holding member. , is pivoted at the fulcrum part, and this handle part is linked to two link arms, so the axial sliding of the nut member, that is, the sliding reciprocating movement, is carried out by the two links. Squeeze or spread your arms. Therefore, the scissor-shaped cutting member, which is linked to the two link arms and the handle portion, opens and closes its blade portion. Therefore, the sliding of the nut member in the axial direction is performed by two link arms and a pair of scissor-shaped cutting members to which the handle portion is linked.
Each blade rotates to open and close, and the nut member, 2
The book link arm and the cutting member form a so-called toggle link mechanism.

Furthermore, since the nut member is slid in the axial direction by being screwed into the rotating rotation transmission shaft, this sliding is achieved by the axial thrust generated by the rotation of the screw.

(Example) An example of this invention will be described below with reference to the drawings.

FIG. 1 shows a plan view, and FIG. 2 shows a partially sectional side view. As is clear from each figure, in this embodiment, the holding member that rotatably holds the rotation transmission shaft 1 is pressurized at one end above and below, respectively. It consists of an upper cylinder 4 having pieces 2 and 3 facing each other, and a lower cylinder 5 fixed to this, and plate-shaped arm members 6 and 7 facing each other between the upper and lower holding pieces 2 and 3. It is fixed. Further, a claw 5a for joining with a rotary stick is provided on the outer periphery of the lower end of the lower cylinder 5 on the opening side.

The rotation transmission shaft 1 has a collar 1a provided on its outer periphery in the middle.
is held between bearings 8 and 9 fixed to the upper cylinder 4, and a pin 10 that passes through the rotation transmission shaft 1 at right angles is provided at the opening side end of the lower cylinder 5 of the rotation transmission shaft 1. is provided. This pin 10 is a member for interlocking with the rotating shaft of the rotary stick.

Further, a threaded thread 1b is cut at the tip of the rotation transmission shaft 1. Thread groove 11 that fits this thread 1b
A rectangular cylindrical nut member 11 having a diameter inside thereof is screwed into the thread 1b of the rotation transmission shaft 1 and the thread groove 11a thereof so that the nut member 11 can freely slide in the axial direction between the arm members 6 and 7. It is kept in storage. Note that this nut member 1 is a rectangular tube, and both outer peripheral surfaces thereof are in contact with the arm members 6 and 7, respectively, so that it does not rotate due to the rotation of the rotation transmission shaft 1.

At the tip of the nut member 11, protrusions 11c and 11d are provided so as to form a recess 11b when viewed from above. Further, elongated holes 6a and 7a are bored in the longitudinal direction of the sides of the arm members 6 and 7, respectively, and a pin 12 is passed between the elongated holes 6a and 7a. Note that this pin 12 is slidable in the axial direction through these long holes 6a and 7a.

In this embodiment, the two protrusions 11c and 11d of the nut member 11 are rotatably fixed to the pin 12, and furthermore, the pin 12 has the following:
One end of each of plate-shaped link arms 13 and 14 having semicircular shapes at both ends is rotatably fixed at the forward recess 11b. In this embodiment, one pin 12 is loosely inserted between the arm members 6 and 7, and the protrusion 1 of the nut member is attached to this pin 12.
1c, 11d and the link arms 13, 14 are rotatably fixed, respectively, but the gist of this invention is not limited to such a structure, and the point is that the link arm is attached to the tip of the holding member and the slidable nut member. All you have to do is lock one end so that it can rotate freely.

As shown in the figure, the cutting member of the present embodiment has approximately V-shaped cutting members 15 and 16 bent at an obtuse angle so as to constitute exactly a pair of scissors, that is, each blade portion 15a and 16a is A spacer 17, 18 is interposed between the ends of the arm members 6, 7 so that a portion of each arm member overlaps and can rotate freely at this portion, and the arm members 6, 7 are pivoted by a pin bolt 19 and a nut 20. There is. Furthermore, these cutting members 15, 16
The handle portion of the handle is rotatably connected to the link arms 13 and 14 by pins 21 and eyelets 22. In this embodiment, the state of this link is as shown in FIG.
When located at the side ends of cutting members 15 and 16 of a,
The angles at which the link arms 13 and 14 are bent are obtuse angles, and the blade portions 15a and 1 of the cutting members 15 and 16 are
6a is partially polymerized and closed.

According to the embodiment configured as described above, when the rotation transmission shaft 1 rotates, the nut member 1 is rotated as shown in FIG.
1, and the pin 12 slides inside the elongated holes 6a and 7a. At this time, the cutting members 15 and 16 are pivoted to the arm members 6 and 7, and the link arms 13 and 14 linked to the cutting members 15 and 16 are pivoted to the pin 12. As the link arms 13 and 14 slide, the link arms 13 and 14 become smaller, and by linking the handles to these, the pair of scissor-shaped cutting members 15 and 16 open the previously closed blade parts 15a and 16a. That's what I do.

Note that the sliding width of the nut member 11 is the same as that of the long hole 6.
It is regulated by the length of a and 7a.

Further, when the rotation transmission shaft 1 rotates in the opposite direction to that described above, a completely opposite operation is performed, and the blade portions 15a, 16a
is closed again to cut the object.

To attach the cutter tool according to the above embodiment to the existing rotary stake 23, first fix one end of the rotary joint 25 to the rotating shaft 24 of the rotary stake 23, as shown in FIG. Place the lower cylinder 5 on the outer periphery of the rotary stay 23 while fitting the pin 10 of the rotation transmission shaft 1 into the recess 25a provided at the other end of the rotary joint 25, and then insert the claw 5a on the lower cylinder 5 into the rotary state. The claw 23a on the outer periphery of the hook 23 is engaged with the claw 23a.

(Effects) As is clear from the above embodiments, according to this invention, the nut member, the link arm, and the scissor-shaped cutting member constitute a so-called toggle link mechanism, and the force applied to the nut member is increased. It is transmitted to the blade of the cutting member. Moreover, since the force for sliding the nut member is the axial propulsion force of the screw, an even stronger force is applied to the blade portion, resulting in an extremely strong cutting force. In other words, according to this invention, a strong cutting force can be obtained with a small amount of force.

In addition, from a work point of view, if the manual operation is performed, the operation at hand is simply a rotational operation; instead, if a motor or the like is used as appropriate, the operator only needs to support the rotary stick. Therefore, anyone can easily and smoothly cut overhead power distribution lines, etc., without requiring any skill.

[Brief explanation of drawings]

Fig. 1 is a plan view of the embodiment, Fig. 2 is a partially sectional side view of the same, Fig. 3 is a side view of the main part of the same partially sectional, and Fig. 4 is a partially sectional view showing how it is attached to the rotary stake. FIG. In the figure, 1 is the rotation transmission shaft, 2 and 3 are the holding pieces,
4 is an upper cylinder, 5 is a lower cylinder, 5a is a claw, 6 and 7 are arm members, 10 is a pin, 11 is a nut member, 12 is a pin, 13 and 14 are link arms, 15 and 16, respectively.
are respectively cutting members.

Claims (1)

[Scope of utility model registration request] A rotation transmission shaft that interlocks with the rotation shaft of the rotary stake at one end is rotatably held in a cylindrical holding member, and two opposing arm members protrude in the axial direction from both sides of the holding member, One end of a nut member that can freely slide in the axial direction between the arm members and does not rotate itself is screwed together with the other end of the rotation transmission shaft, and further two link arms are rotatably attached to the other end of the nut member. A pair of scissor-shaped cutting members is rotatably pivoted between the tips of the forward arm members at the point that serves as the fulcrum of the scissors, and the two link arms and the handle of the cutting member are A single-acting type cutter tool, characterized in that the parts are linked to each other, and the front holding member is detachable from the rotary stay.