JPH1128294A - Cutter for cable and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the controllability and cutting operability of an operation handle during the opening movement of cutting blades. SOLUTION: A cutter 1 for cable and the like has a first cutting blade 2 having a handle 3 and a second cutting blade 4, which are journalled to each other by a short shaft 5, and a drive piece engaging part (ratchet teeth) 28 is formed in a circular arc shape at the first end of the second cutting blade 4. A drive piece (ratchet claw) 31 which is engaged with the engaging part 28 is journalled to an operation handle 7 journalled to the main body part 2B of the first cutting blade 2, to form an intermittent rotary drive mechanism (ratchet mechanism) 8. An oblong hole 29 in the form of a circular arc whose center is located at the short shaft 5 is provided at the root of the second cutting blade 4, the end connection 10A of a second cutting blade recovery link 10 one end of which is pivotally attached to the control handle 7 is connected to a connector 40 loosely fitted into the oblong hole 29, the link 10 is made to run along the outside of the control handle 7, and the second cutting blade 4 is put into intermittent turning movements by the operation of opening and closing the handles 3, 7. In this case, the end of the oblong hole 29 is formed into a one-step opening- movement engaging part 32, and opening-movement engaging parts 33 are provided on one or plural stages at a certain position from the engaging part 32 and on the inner edge 29A of the oblong hole 29, so that the opening movement of the second cutting blade 4 is effected in plural steps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for cables and pipes.

[0002]

2. Description of the Related Art Conventionally, as a cutter of this type, a first cutting blade provided at a distal end portion of a main body having a handle at a base portion,
A second cutting blade for cutting a cable or the like in cooperation with the first cutting blade is axially attached by a short axis, and a base of the second cutting blade is formed in an arcuate ratchet tooth centered on the short axis. A ratchet mechanism is formed by pivotally connecting a ratchet claw that meshes with the ratchet teeth to an operation handle that is openably and closably opposed to the handle on the main body, and a ratchet mechanism is formed by opening and closing the two handles. Then, the second cutting blade is rotated in the closing direction with respect to the first cutting blade, a first return link having one end pivotally attached to the second cutting blade, and one end pivotally attached to the operation handle. There is a second return link connected to the outside of the book side by a connection pin.

[0003] In this conventional cutter, the operating force of the handle at the time of cutting a cable or the like is uniform and a large cutting force can be obtained with a small force. The link can be rotated to return to the state before the start of cutting. However, in order to prevent the return link from interfering with the main body and the ratchet pawl, the return link is protruded to the outside of the main body.

[0004] In order to solve such a problem, the applicant of the present application has provided an arc-shaped long hole centered on a short axis at the base of the second cutting blade, and has a first end pivotally connected to the operation handle side. A cutter is proposed in which the other end of the two-cutting blade return operation link is connected to a pin movably inserted into the long hole.
(See Japanese Patent Application No. 9-63588). According to this cutter, the second cutting blade return operation link can be smoothly operated without interfering with the main body and the ratchet pawl, etc., and the number of parts can be reduced. And has the advantage of being compact.

[0005]

By the way, in the above-mentioned cutter according to the prior application, the second cutting blade is opened to the maximum with respect to the first cutting blade in order to bring the cable or the like into a state before the start of cutting. However, it was necessary to open the operation handle with respect to the other handle. Therefore, it is necessary for the operator to perform the operation while making it difficult to operate and not to touch the surroundings.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to reduce the opening of the handle during the opening operation of the cutting blade in a plurality of stages. An object of the present invention is to provide a cutter, such as a cable, capable of improving operability.

[0007]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention, a first cutting blade provided with a first handle at the base end, and a second cutting blade that cuts a cable or the like in cooperation with the first cutting blade, is pivotally mounted on a spindle, The first cutting blade is provided with a second handle facing the first handle and pivotally opened and closed, between the second handle and the second cutting blade,
An intermittent rotation drive mechanism that rotates the first and second handles in a direction that closes the second cutting blade with respect to the first cutting blade by opening and closing the first and second handles, and a first and second handles that are closed by opening the first and second handles. In a cutter such as a cable provided with a rotation returning means for rotating the two cutting blades in the opening direction and bringing the cutting blade into a state before the start of cutting, the rotation returning means performs the opening operation of the first and second handles a plurality of times. A rotary operating portion for opening the second cutting blade in a plurality of stages.

According to this, by opening and closing the first and second handles, the second cutting blade is rotated intermittently with respect to the first cutting blade via the intermittent rotation drive mechanism. , Cut cables, etc. When the cutting of the cable or the like is completed, by opening the first and second handles, the second cutting blade is rotated in the opening direction via the rotation returning means to return to the state before the start of cutting. At this time, since the rotation returning means is provided with a rotation operating portion for rotating the second cutting blade in a plurality of steps by a plurality of handle opening operations, the opening degree of the handle is reduced each time, and It is possible to open the second cutting blade, and the handle operation is facilitated (Claim 1). According to the present invention, the rotation returning means is arranged so that the second cutting blade is centered on the support shaft. An elongated hole formed in an arc shape, and an engaging member movably inserted into the elongated hole,
A second cutting blade return operation link having one end pivotally connected to the second handle and the other end connected to the engagement member, wherein the rotating operation portion is engageable with the engagement member. A plurality of stages of opening operation engaging portions are formed in the elongated hole.

According to this, during the cutting operation, when the first and second handles are opened and closed, the other end of the second cutting blade return operation link is moved through the elongated hole via the engaging member, and the return operation link is cut. When the second cutting blade is rotated in the opening direction after the cutting operation, the engaging member is engaged with the opening operation engaging portion formed in the elongated hole, and the first and second cutting blades are engaged. The opening operation of the second cutting blade can be easily performed by opening the handle (claim 2).

In the opening operation engaging portion, one end of the elongated hole in the longitudinal direction is used as a first stage opening operation engaging portion. It is preferable to provide a second stage or more opening operation engaging portion on the peripheral edge (claim 3),
Further, between the second handle and the second cutting blade return operation link, during the cutting operation, the operating link is urged so as to press the engaging member toward the outer peripheral edge side of the long hole, and the second cutting blade It is preferable to dispose an elastic member such as a spring for urging the operation link so as to press the engagement member toward the inner peripheral edge of the elongated hole at the time of the opening operation (claim 4).

By performing the above, during the cutting operation,
Due to the urging force of the elastic member, the engaging member rarely engages with the opening operation engaging portions of the second and subsequent steps formed on the inner peripheral edge of the long hole, and the cutting operation can be performed smoothly. At the time of the opening operation of the two cutting blades, the engaging member is securely engaged with the opening operation engaging portion of the second step or more by the urging force of the elastic member, and the second cutting blade is smoothly returned to the state before the start of cutting. be able to.

Preferably, the elastic member is a coil torsion spring. One end of the spring is fixed to the second handle, and the other end of the spring is connected to the second cutting blade return operation link by the longitudinal end of the link. By attaching it movably in the direction,
The angle at which the coil torsion spring is forcibly opened by operation of the second handle is relatively small, and fatigue damage of the spring can be prevented (claim 5).

[0013] An arc-shaped band centered on the support shaft is provided at the base of the second cutting blade, and the arc-shaped elongated hole is provided in the arc-shaped band. As small as possible, the weight can be reduced and the handling becomes easy (claim 6). Further, as the intermittent rotation drive mechanism,
A drive piece pivotally attached to the second handle, and a drive piece engaging portion formed in the second cutting blade in an arc shape around the support shaft and engageable with the drive piece. Further, when the first and second handles are opened to rotate the second cutting blade in the opening direction, an engagement release member for disengaging the driving piece from the driving piece engaging portion is provided. Then, at the time of the returning operation of the second cutting blade, the engagement between the driving piece and the engaging portion thereof is securely released, and the returning operation of the second cutting blade is performed smoothly. (Claim 7).

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a cutter 1 such as a cable according to the present invention, and is most suitable for cutting a cable C in which reinforcing wires of a cable main body are integrally arranged. Figure 1
As shown in FIG. 3, the cutter 1 such as a cable has a first cutting blade 2 composed of a blade 2A at the tip and a main body 2B.
A handle (first handle) 3 fixed to the base end of the main body 2B; a second cutting blade 4 for cutting the cable C in cooperation with the first cutting blade 2; (A support shaft) 5 and a nut 6 which are rotatably mounted on the main body 2B, an operation handle (second handle) 7 which is opposed to the handle 3 and is openably and closably mounted on the main body 2B, and an operation handle An intermittent rotation drive mechanism 8 that rotates the second cutting blade 4 in the closing direction by opening and closing the handle 7 and the handle 3, an engagement release member 9 of the mechanism 8, the operation handle 7 and the handle 3 It mainly comprises a rotation return means 48 which returns the second cutting blade, which has been closed by opening, to the opening direction so as to be in a state before the start of cutting.

The blade 2A of the cutting blade 2 has two sets of bolts 12, 13 and nuts 14, 15 at the tip of the main body 2B.
It is detachably attached by a bolt 16. The handle 3 is fixedly integrated with a base end portion of the main body 2B by a rivet 17, and a grip 18 made of an elastic material such as rubber is fitted over the base portion of the handle 3. The main body 2B of the first cutting blade 2 is provided with opposed plates 19A and 19B which are arranged back and forth at a distal end thereof and are in close contact with each other at a proximal end thereof, and a distal end interval between the opposed plates 19A and 19B. And a connecting portion 19C for connecting and integrating the opposing plates to each other outside the intermediate portion. The first and second cutting blades 2 and 4 are inserted between the opposing plates 19A and 19B at the distal end, The blade 2A of the first cutting blade 2 is provided on the inner surface of the front facing plate 19A.
Is detachably fixed by the bolt 16.

The tip and the intermediate portion of the first cutting blade 2 are fixed to the opposed plates 19A and 19B by the bolts 12 and 13 and the nuts 14 and 15 via spacers 20, 21 and 22. It is integrated with the main body 2B. In addition, the said spacer 20 is the 2nd cutting blade 4
The spacer 21 may function as a stopper that regulates the cutting end of the second cutting blade 4 as a stopper that regulates the return end of the second cutting blade 4.

The opposing plates 19A,
The short axis 5 side of the tip of 19B is curved in a concave shape, and the cutting blade 23 and the mounting part 24 of the blade part 2A of the first cutting blade 2.
Is exposed so as not to hinder the axial attachment of the second cutting blade 4 and the cutting of the cable C. The spacer 2
Numeral 2 is to maintain a space between the second cutting blade 4 and the rear facing plate 19B.

The opposing plate 1 constituting the main body 2B
At the intermediate portion between 9A and 19B, an attachment lug 25 of the operation handle 7 is provided on the opposite side of the connecting portion 19C so as to protrude toward the end of the handle 3, and is provided at the base end in a direction perpendicular to the direction. An extended handle closed end regulating projection 26 is provided,
Further, a ratchet engagement window 27 is provided.

The operating handle 7 has a grip 18 made of an elastic material such as rubber at its base end, and its tip end is connected to the main body 2B of the first cutting blade 2 via a handle connecting member 34. It is rotatably mounted on the mounting ear 25 provided by a pivot 35. The handle connecting member 34 includes front and rear opposing plates 34A and 34B that are attached to the mounting lug 2.
On the 5th side, the connecting portion 34C that keeps a gap is connected and integrated, and specifically, is bent and formed by a single plate. The mounting side of the operating handle 7 is a mounting portion 34D that is in close contact with the front and rear, and the upper end of the operating handle 7 And is fixed to the rivet 36.

In the second cutting blade 4, an arc-shaped band-shaped portion 4 B extending on the side opposite to the cutting blade 4 A (ie, the base end) and facing the cutting blade 4 A and centered on the short axis 5 protrudes. A ratchet tooth (drive piece engaging portion) 2 which constitutes a ratchet mechanism, which is one of the intermittent rotation drive mechanisms 8, is provided on the outer peripheral arc surface from the middle of the arc band portion 4B to the base end of the cutting blade.
8 are formed.

The ratchet mechanism 8 is provided between the ratchet teeth (drive piece engaging portion) 28 of the second cutting blade 4 and the front and rear opposing plates 34A, 34B of the handle connecting member 34. A ratchet pawl (driving piece) 31 pivotally connected via 37, and a biasing spring 38 for urging the two pawls 31A of the ratchet pawl 31 to simultaneously press the ratchet teeth 28 in the direction of meshing with the ratchet teeth 28. I have.

When the operating handle 7 is operated in the closing direction by the ratchet mechanism 8, the ratchet pawl 31 meshes with the ratchet teeth 28 and rotates in the closing direction of the second cutting blade 4. When the operation handle 7 is operated in the opening direction, the ratchet pawl 31 swings via the mounting shaft 37 to be disengaged from the ratchet teeth 28 and mesh with the adjacent ratchet teeth 28.

A handle connecting member 34 is attached to the pivot 35.
The base of the return preventing link 9 of the ratchet teeth 28 is rotatably mounted between the front and rear opposing plates 34A and 34B, and the return preventing link 9 is provided between the ratchet teeth 28 and the ratchet pawl 31. And are arranged substantially in parallel. The return prevention link 9 has a U-shaped cross section,
The distal end 9A is orthogonal to the ratchet teeth 28, and can be engaged with and disengaged from the ratchet teeth 28. Except for the distal end 9A, it is located on both front and rear sides of the ratchet teeth 28 so as not to interfere.

When the operating handle 7 is opened and the ratchet pawl 31 is disengaged from the ratchet tooth 28, the tip 9A of the return preventing link 9 is engaged with the ratchet tooth 28, and the second cutting tooth is repelled by a cable or the like. When the operation handle 7 is closed and the ratchet teeth 28 are fed with the ratchet pawls 31 to prevent the backing of the ratchet 4, the return preventing link 9 is disengaged from the ratchet teeth 28 and then re-engages with the adjacent ratchet teeth 28. Are adapted.

As shown in FIG. 4, in the middle of the outer periphery of the arc-shaped band portion 4B, following the end of the ratchet teeth 28, a link climbing portion 30 on which the return preventing link 9 rides is formed.
Are provided at the same height as the tooth tip. Ratchet teeth 2
The distal teeth 8 are provided for engaging the return preventing link 9 when the second cutting teeth 4 are closed until the end of cutting, and the ratchet teeth 31 are engaged with the ratchet teeth 28 at the distal end. In this case, the second cutting teeth 4 rotate more than necessary, and the cutting blade may be pressed against the spacer 21 to be damaged.

Therefore, when the operation handle 7 is opened after the return prevention link 9 is engaged with the ratchet teeth 28 at the end, the return prevention link 9 rides on the riding section 30 so that the tip of the link 9 9A is ratchet nail 3
Abuts against the contact portion 31B of the first and pushes up the ratchet claw 3
The two claw portions 31A do not mesh with the ratchet teeth 28 at the end. Thereby, both cutting blades 2, 4
After the cutting of the cable C is completed, even if the operation handle 7 is opened and closed, the second cutting blade 4 is not sent in the closing direction.

As shown in FIG. 5, when the operating handle 7 is opened in order to rotate the second cutting tooth 4 in the opening direction via the rotation returning means 48, the base end 9B of the return preventing link 9 becomes At this time, the tip 9A of the link 9 contacts the link contact portion 31B of the ratchet pawl 31, and the ratchet pawl 31 is rotated in a direction away from the ratchet teeth 28, The meshing can be released. That is, when the second cutting blade 4 returns to the rotation, the return prevention link 9 moves the ratchet teeth 2.
It also serves as an engagement release link for disengaging the ratchet pawl 31 from 8, so that the second cutting blade 4 can smoothly rotate in the opening direction.

The rotation returning means 48 which rotates from the closed state to the open state of the second cutting blade 4 is movably inserted through the long hole 29 provided in the second cutting blade 4 and the long hole 29. The connecting member (engaging member) 40, the second cutting blade returning operation link 10 having one end pivotally connected to the operation handle 7 side and the other end connected to the connecting member 40, and the connecting member 40 can be engaged. And a rotating operation part 49 having a plurality of stages of opening operation engaging parts 32 and 33.

The long hole 29 is formed in the arc-shaped band portion 4B of the second cutting blade 4 in an arc shape centered on the short axis 5 over substantially the entire length of the band-shaped portion 4B. The return operation link 1
Numeral 0 denotes a bifurcated connecting portion 10A, 10A having a U-shaped cross section and having both ends in the longitudinal direction bent to the open end of the opposing wall.
B, the connecting portion 10A on the distal end side is attached to both ends of the connecting member 40 which is inserted and loosely inserted into the long hole 29, and the connecting portion 10B on the proximal end side is located on the proximal end side of the handle connecting member 34, and the front and rear thereof. They are connected by a pivot 41 so as to be relatively rotatable so as to be sandwiched from the surface.

The return operation link 10 is provided with a long hole 42 extending in the longitudinal direction and penetrating in the front-rear direction at an intermediate portion in the longitudinal direction, and a pin 43 passing through the long hole 42 in the front-rear direction. Are fitted so as to be movable in the longitudinal direction.
One end of a coil torsion spring 11 as the elastic member is wound around and connected to the pin 43, and the torsion spring 1
1 is a front-rear facing plate 3 of the handle connecting member 34.
Between 4A and 34B, it is wound and connected to a spring fixing pin 44 penetratingly fixed to the opposing plates 34A and 34B.

The intermediate portion of the operation link 10 is
It is located inside the base end 9B of the return prevention link (disengagement link) 9 so as to operate smoothly without interfering therewith, and the front and rear outer ends of the pin 43 are prevented from returning. There is no interference with the base end 9B of the link 9. The second cutting blade return operation link 10 is connected to the both ends connecting portion 1.
In the closed state of the handles 3 and 7, the intermediate portion excluding the first and second handles 0 A and 10 B is in contact with the outside of the handle connecting member 34 so as to be in contact with the handle connecting member 34. The cutter 1 can be housed in a compact manner without protruding from the outer end thereof, and the left and right width of the cutter 1 can be reduced as much as possible, and the storage space can be minimized by reducing the bulk.

The end of the elongated hole 29 facing the tip of the second cutting blade 4 (ie, the end on the tip of the strip 4B).
Is a first-stage opening operation engaging portion 32 with which the connecting member 40 is engaged when the second cutting blade 4 is opened, and a long hole 29 separated from the first-stage opening operation engaging portion 32 by a predetermined distance. Inner edge 29 of
A (a short shaft 5 side) is provided with a notch, and this notch serves as a second-step opening operation engaging portion 33 with which the connecting member 40 is engaged.

The connecting member 40 is connected to the first stage opening operation engaging portion 32.
When the operation handle 7 is opened by engaging the second cutting blade 4, the second cutting blade 4 is pushed to perform the first-stage opening operation. Connecting material 4
When the operating handle 7 is opened again, the second cutting blade 4 is pushed again to perform the second stage opening operation, whereby the second cutting teeth 4 are opened to the maximum. I have.

The coil torsion spring 11 presses the connecting member 40 toward the outer peripheral edge 29 B of the elongated hole 29 when the cable is cut by rotating the second cutting blade 4 in the closing direction. When the operation link 10 is urged and the second cutting blade 4 is rotated in the opening direction by the return operation link 10 and the connecting member 40, the connecting member 40 is pressed against the inner peripheral edge 29 </ b> A of the elongated hole 29. It is energizing.

Specifically, as shown in FIGS. 1 and 2, when the operating handle 7 is opened and closed for cutting operation, both ends of the torsion spring 11 are closed as compared with the neutral state. In this state, the return operation link 10 is urged toward the operation handle 7 in the opening direction, and the connecting member 40 at the tip of the return operation link 10 is pressed against the outer peripheral edge 29 </ b> B of the elongated hole 29 by this urging. I have.

When the operating handle 7 is widely opened in order to rotate the second cutting blade 4 in the opening direction, as shown in FIG. 6, both ends of the torsion spring 11 are more open than in the neutral state. As a result, the return operation link 10 is urged toward the operation handle 7 in the closing direction, and the urging force presses the connecting member 40 at the distal end of the return operation link 10 against the inner peripheral edge 29 </ b> A of the elongated hole 29. ing.

From the above, when the second cutting blade 4 is closed (when a cable or the like is cut), the connecting member 40 at the tip of the return operation link 10 is pressed by the outer peripheral edge 29B of the elongated hole 29 and the second cutting blade 4 is closed. When the connecting member 40 is prevented from engaging with the opening operation engaging portion 33, a smooth cutting operation can be performed, and when the second cutting blade 4 is opened to a state before the start of cutting, the connecting member 40 is pressed by the inner peripheral edge 29 </ b> A of the elongated hole 29 to promote engagement with the second opening operation engaging portion 33.

Further, since the coil torsion spring 11 is movable at one end with the elongated hole 42 as a guide with respect to the operation link 10, it is possible to prevent the spring opening angle from becoming too large and to reduce the fatigue of the spring. Damage can be prevented.
In FIG. 1, reference numerals 45 and 46 denote reinforcing rods, and the front and rear opposing plates 19A, 19B and 34 of the main body 2B and the handle connecting member 34.
A and 34B are connected to ensure strength. Reference numeral 47 denotes a spring covering projection which covers the coil portion of the coil torsion spring 11 and protects the coil portion from external contact or the like.

Next, the cable cutting operation of the above embodiment will be described. FIG. 1 shows a state where the cutting of the cable cutter 1 is completed. In the cutting completion state, the cutting blade 4A of the second cutting blade 4 is located at a position close to the spacer 21. At this time, even if the operation handle 7 is operated in the opening direction, the contact part 31B of the ratchet pawl 31 returns. Simply riding on the tip 9A of the prevention link 9, the ratchet teeth 28
(See FIG. 4), the second cutting blade 4 is not fed more than necessary, and damage to the cutting blade 4A is prevented.

In order to return to the cutting start state shown in FIG. 2, when the operating handle 7 is opened in the direction indicated by the arrow A in FIG.
The first stage opening operation is performed by engaging the first stage opening operation engaging portion 32 of the elongated hole 29 and pushing the second cutting blade in the opening direction (the state of FIGS. 5 to 6). On the other hand, the base end portion 9B of the return prevention link 9 contacts the connecting portion 34C of the handle connecting member 34 and rotates in a direction away from the ratchet blade 28, whereby the ratchet pawl 31 is pushed up and the pawl 31
Can smoothly return to the rotation of the second cutting teeth 4 without engaging with the ratchet teeth 28.

As shown in FIG. 6, the operating handle 7 is stopped when the distal end of the connecting portion 34C of the handle connecting member 34 abuts on the mounting lug 25 provided on the main body 2B of the first cutting blade 2. I do. The opening angle of the operating handle 7 shown in FIG. 6 is a limit for ensuring the operability, and if the operating handle 7 is opened farther to the handle 3 than this, the operating angle of the operating handle 7 is increased to deteriorate the operability. The operation is regulated.

When the operating handle 7 is returned to the closing direction indicated by the arrow B in FIG. 6, the connecting member 40 is urged by the coil torsion spring 11 toward the inner peripheral edge 29A of the elongated hole 29. Engagement with the second stage opening operation engaging portion 33 is promoted,
Generates a clicking sound when engaged (see FIG. 7).
At this time, when the operating handle 7 is again opened in the direction shown by the arrow A in FIG. 7, the second cutting blade 4 returns to the direction shown by the arrow C in FIG. Return to. Subsequently, by returning the operation handle 7 to the direction shown by the arrow B in FIG.
The ratchet pawl 31 also rotates back together with the disengagement link 9 without rotating the second cutting blade 4, and the ratchet pawl 31 starts at the start end of the ratchet teeth 28 as shown in FIG. The state returns to the state in which the claw portion 31A of the second gear is engaged.

Before the cable cutter 1 starts cutting, the cutting blades 23 and 4A of the first and second cutting blades 2 and 4 face each other and are substantially parallel to each other. Therefore, when cutting the cable C, the cable C is inserted between the two cutting blades 23 and 4A as shown by a two-dot chain line in FIG.
, The ratchet pawl 31 intermittently feeds the ratchet teeth 28, and the second cutting blade 4 intermittently rotates in the closing direction toward the cutting blade 23 of the first cutting blade 2. Then, both cutting blades 2 and 4 are closed, and the state shown in FIG. 1 is obtained, and the cutting of the cable C is completed.

When the cable C is cut again, the above operation is repeated to return the second cutting blade 4 to the state shown in FIGS. According to the above embodiment, since the second cutting blade return operation link 10 is provided outside the operation handle 7, specifically, outside the handle connection member 34, the second cutting blade return operation link 10 greatly protrudes outside when the handle is closed. (Fig. 1
), So that the link 10 does not become an obstacle during storage or transportation, and the left and right width of the cable cutter 1 can be reduced as much as possible. In addition, the number of components can be reduced, and the second cutting blade return operation link 10 can operate smoothly without interfering with the ratchet mechanism 8.

The base of the second cutting blade 4 has an arc-shaped band 4
Since B is provided, the weight can be reduced and the operability of the cutter 1 can be improved. Further, the arc-shaped band portion 4B
Since the long hole 29 has a first-stage closing operation engaging portion 32 and a second-stage closing operation engaging portion 33, the opening operation of the second cutting blade 4 is completed in two stages. The open / close operation of the operation handle 7 can be easily performed, the workability can be improved, and the opening distance S between the first and second cutting blades 2 and 4 can be increased to cut a large cable diameter. At the same time, the cable can be easily inserted between the two cutting blades 2 and 4.

Further, the coil torsion spring 11 is mounted between the operation handle 7 and the second cutting blade return operation link 10 so that the inner peripheral edge 2 of the elongated hole 29 can be opened when the connecting member 40 is opened.
9A, in order to press the outer peripheral edge 29B side during the closing operation,
Since the second cutting blade return operation link 10 is urged, the opening / closing operation can be performed smoothly. Since the operation link 10 can be attached to the coil torsion spring 11 in the longitudinal direction, the opening angle of the spring 11 can be reduced to a reasonable degree, preventing fatigue damage and improving durability. Can be planned.

Further, since the link 9 is provided with the return preventing link 9 and the link running section 30 is provided at the end of the ratchet teeth 28, the tip 9A of the link 9 runs on the link running section 30 after the cutting is completed, and the operation handle is operated. 7, the link contact portion 31B of the ratchet pawl 31 only rides on the tip 9A of the link 9, but the pawl 31A of the ratchet pawl 31 does not engage with the ratchet teeth 28, and the ratchet pawl 31 is ratcheted. Without sending the teeth 28,
Therefore, the second cutting blade 4 does not rotate, so that the cutting blade 4A can be prevented from being damaged.

Further, the return preventing link 9 is also a disengagement link for releasing the engagement of the ratchet pawl 31 when the second cutting blade 4 is returned and rotated, so that the return cutting link 9 can be smoothly returned and rotated. Further, since the first cutting blade 2 is detachably provided on the main body 2B, grinding and replacement when the blade edge 23 is broken can be easily performed.

The second cutting blade 4 can be formed by adding one or more stages of engaging portions in addition to the opening operation engaging portion 33.
Can be divided into three or four steps. Further, the handle connecting member 34 can be integrally formed with the operation handle 7, and the first cutting blade 2 can also integrate the blade 2A and the main body 2B.

The present invention is not limited to the above embodiment. For example, the intermittent rotation drive mechanism is constituted by an arc-shaped pin rack instead of the ratchet mechanism 8 and a drive piece having a claw engaged with the same. Further, other elastic members such as leaf springs can be adopted in place of the coil torsion spring 11, and other flat plate shapes can be used in place of the arc-shaped band portion 4B.

[0051]

As described in detail above, according to the present invention,
The opening operation to return the second cutting blade to the state before starting cutting can be performed in multiple stages by opening the handle several times, and the opening angle of each handle can be easily and smoothly set as an angle that is easy to work Opening operation can be performed, and workability can be improved.

Further, since the opening interval between the first and second cutting blades can be increased, it is easy to insert the cable between the two cutting blades, and it is also possible to cut a cable having a large diameter.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view of the state before the start of cutting.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is an operation explanatory diagram in the embodiment.

FIG. 5 is an explanatory view of an opening operation of the second cutting blade.

FIG. 6 is an explanatory diagram of the opening operation.

FIG. 7 is an explanatory view of the opening operation.

FIG. 8 is an explanatory diagram of the opening operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable cutter 2 1st cutting blade 2A blade 2B main body 3 Handle (1st handle) 4 2nd cutting blade 4B Arc band 5 Short axis (support shaft) 7 Operation handle (2nd handle) 8 Ratchet mechanism (intermittent) 9 Rotation prevention mechanism 9 Return prevention link (disengagement link) 10 Second cutting blade return operation link 11 Coil torsion spring (elastic member) 28 Ratchet teeth (drive piece engagement portion) 29 Long hole 29A Inner peripheral edge 29B Outer peripheral edge 31 Ratchet pawl (drive piece) 32 First-stage opening operation engaging portion 33 Second-stage opening operation engaging portion 40 Connecting member (engaging member) 48 Rotation return means 49 Rotating operation portion C cable

Claims (7)

[Claims] 1. A first cutting blade provided with a first handle at a base end thereof, and a second cutting blade for cutting a cable or the like in cooperation with the first cutting blade, being axially mounted on a spindle. For the first cutting blade,
A second handle is provided opposite to the first handle and pivotally mounted on the second handle. The first handle and the second handle are opened and closed between the second handle and the second cutter. An intermittent rotation drive mechanism that rotates the first cutting blade with respect to the first cutting blade, and a state before the start of cutting by opening the first and second handles to rotate the second cutting blade that is closed in the opening direction. And a rotation returning means, wherein the rotation returning means opens the second cutting blade in a plurality of stages by opening the first and second handles a plurality of times. A cutter, such as a cable, comprising a part. 2. The method according to claim 1, wherein the rotation returning unit includes: an elongated hole formed in the second cutting blade in an arc shape around the support shaft; an engaging member movably inserted into the elongated hole; A second cutting blade return operation link having one end pivotally connected to the second handle and the other end connected to the engagement member, wherein the rotating operation portion is engageable with the engagement member; The cutter for a cable or the like according to claim 1, wherein a plurality of stages of opening operation engaging portions are formed in the elongated hole. 3. One end of the elongated hole in the longitudinal direction is a first stage opening operation engaging portion, and a second stage is formed on an inner peripheral edge of the elongated hole away from the first stage opening operation engaging portion. The cutter for a cable or the like according to claim 2, wherein a subsequent opening operation engaging portion is provided. 4. The operating link is urged between the second handle and the second cutting blade return operating link so as to press the engaging member toward the outer peripheral edge of the elongated hole during the cutting operation. 4. An elastic member, such as a spring, for urging the operation link so as to press the engaging member toward the inner peripheral edge of the elongated hole when the two cutting blades open, is provided. Cutter such as the described cable. 5. The elastic member comprises a coil torsion spring, one end of the spring is fixed to a second handle, and the other end of the spring is movable to a second cutting blade return operation link in the longitudinal direction of the link. 5. The device is mounted.
Cutters such as cables described in. 6. An arc-shaped band centered on the support shaft is provided at a base of the second cutting blade, and the arc-shaped elongated hole is provided in the arc-shaped band. Item 2
A cutter such as a cable according to any one of claims 1 to 5. 7. The intermittent rotation drive mechanism is configured such that a drive piece pivotally attached to the second handle is formed in an arc shape around the support shaft with the second cutting blade, and the drive piece is engaged with the second cutting blade. And a driving piece engaging portion that can engage the driving piece with the driving piece engaging portion when the first and second handles are opened to rotate the second cutting blade in the opening direction. The cutter for a cable or the like according to claim 1, further comprising a disengagement releasing member.