AU2020202083A1

AU2020202083A1 - Cutting tool

Info

Publication number: AU2020202083A1
Application number: AU2020202083A
Authority: AU
Inventors: Yukio Fudemoto
Original assignee: Nagaki Seiki Co Ltd
Current assignee: Nagaki Seiki Co Ltd
Priority date: 2016-11-04
Filing date: 2020-03-24
Publication date: 2020-04-09
Also published as: AU2016428531A1; TW201818626A; AU2016428531B2; MY195575A; CN109789570B; CN109789570A; KR102125638B1; JP6831591B2; JPWO2018083807A1; WO2018083807A1; TWI646745B; KR20180133483A

Abstract

Provided is a cutting tool that can cut an object while gripping the object in a simpler operation. The cutting tool comprises an object-cutting part having a first blade body and a second blade body, an object-gripping part having a first gripping member and a second gripping member, a linking member that links the object-cutting part and the object-gripping part, an urging member that urges the first gripping member and the second gripping member in a closing direction, a first restricting member that restricts the first gripping member from being moved by the urging force from the urging member, and a second restricting member that restricts the second gripping member from being moved by the urging force from the urging member. 266 26a W 1 6a 36 1 (4) 38 4 18a-- 18 Sal 5 6 18- 5b] IN 26a - 26b (B) 35 45-- - . 28a--- 18a 5b 32 -34 42 (0) 14 45 26 r 24 22 16 28

Description

CUTTING TOOL

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION [0001] The present invention relates to a cutting tool comprising an object-cutting part and an object-gripping part. The object is, for example, a crosslinked polyethylene insulated electric wire for voltage reduction (PDC: plane transformer drop wire crosslinked polyethylene, also referred to as a PD wire below) or another type of wire.

DESCRIPTION OF THE RELATED ART [0002] Cutting tools for cutting wires are known.

[0003] For example, Patent Document 1 (Japanese Patent No. 4862982) discloses a cutting tool having a cutting part that has a pair of cutting blades, an operating part that opens and closes the pair of cutting blades, and a gripping part including a pair of gripping pieces urged by a spring in a direction of clamping the wire. With the cutting tool disclosed in Patent Document 1, the cutting operation is performed with a substantial alignment of the center position of the cutting gap between the pair of cutting blades, and the center position of the gripping gap between the pair of gripping pieces. When the wire is cut, the pair of gripping pieces are first separated from each other by the operation of an opening lever. Next, the wire to be cut is placed between the pair of gripping pieces. The operating lever is then released, whereby the wire to be cut is gripped by the pair of gripping pieces. Then, with the wire gripped by the pair of gripping pieces, the operating part is operated and the wire is cut by the pair of cutting blades. One side of the wire cut by the cutting blades is held by the pair of gripping pieces, the other side of the wire cut by the cutting blades is gripped in one hand, and the wire therefore does not recoil during cutting.

[0004] Patent Document 2 (Japanese Laid-open Patent Application No. 2013-55729) discloses an electric wire cutting tool with a clamp mechanism. The electric wire cutting tool disclosed in Patent Document 2 comprises a fixed blade, a movable blade, a stationary-bladeside link to the side surface of which the fixed blade is fixed, a movable-blade-side link adjacent to the side surface of the movable blade, a support bolt that passes through and pivotably supports these members, a movable blade drive means that cases the movable blade to open and close relative to the fixed blade, and a clamp unit that is pivotably supported

-2 on the support bolt and that clamps the electric wire by opening and closing in synchronization with both the fixed blade and the movable blade. The clamp unit includes a fixed-blade-side clamp and a movable-blade-side clamp. With the electric wire cutting tool disclosed in Patent Document 2, when the electric wire is cut, the urging force of a compression coil spring acts on the movable-blade-side clamp so that the electric wire does not come loose. As a result, the clamp unit clamps the electric wire with the optimal amount of clamp force.

PRIOR ART DOCUMENTS

Patent Documents [0005] [Patent Document 1] Japanese Patent No. 4862982 [0006] [Patent Document 2] Japanese Laid-open Patent Application No. 2013-55729

SUMMARY OF THE INVENTION

Problem to Be Solved by the Invention [0007] Patent Document 1 discloses an operating part that opens and closes the pair of cutting blades, and an opening lever (second operating part). When two operating parts are provided, it is possible that, inter alia, one operating part will need to be held with one hand and the other operating part will need to be operated with the other hand. Document 1 discloses an example in which the wire is gripped with one hand during cutting, but there are also cases in which, depending on the type of wire, the wire cannot be gripped directly by hand. The wire cannot be gripped directly by hand also in cases in which the wire is cut by an indirect method. For example, a high-voltage cable or the like cannot be gripped directly by hand and is normally cut by an indirect method.

[0008] In the electric wire cutting tool disclosed in Patent Document 2, the mechanism, particularly a link mechanism, for synchronizing the clamp unit with the movements of the fixed blade and the movable blade is complex, and a great increase in manufacturing costs is unavoidable.

[0009] In view of this, a purpose of the present invention is to provide a cutting tool that can cut an object while gripping the object in a simple operation. Another purpose of the present

-3invention is to provide a cutting tool comprising a gripping part that can be adapted to objects of various sizes.

Means for Solving the Problems [0010] The present invention relates to the cutting tool presented below.

[0011] (1) A cutting tool, comprising:

an object-cutting part having a first blade body and a second blade body;

an object-gripping part having a first gripping part and a second gripping part;

a linking member that links the object-cutting part and the object-gripping part;

an urging member that urges the first gripping member and the second gripping member in a closing direction;

a first restricting member that restricts the first gripping member from being moved by the urging force from the urging member;

and a second restricting member that restricts the second gripping member from being moved by the urging force from the urging member;

the first blade body having a first hole through which the linking member is inserted, a first blade part disposed on one side of the first hole, and a first arm part disposed on the other side of the first hole;

the second blade body having a second hole through which the linking member is inserted, a second blade part disposed on one side of the second hole, and a second arm part disposed on the other side of the second hole;

the first restricting member being configured to be pushed against a first restricting member stopper by the urging force from the urging member when the first blade part and the second blade part are in an open state; and the second restricting member being configured to be pushed against a second restricting member stopper by the urging force from the urging member when the first blade part and the second blade part are in an open state.

[0012] (2) The cutting tool according to (1) above, wherein the first restricting member stopper is one member from among the first blade body and the second blade body, or is an operation tool for opening/closing the first blade body and the second blade body; and

-4 the second restricting member stopper is another member from among the first blade body and the second blade body, or is an operation tool for opening/closing the first blade body and the second blade body.

[0013] (3) The cutting tool according to (1) above, wherein the first restricting member comes into contact with the first restricting member stopper when the first blade part and the second blade part are in the open state, the second restricting member comes into contact with the second restricting member stopper when the first blade part and the second blade part are in the open state, the first restricting member separates from the first restricting member stopper when the first blade part and the second blade part cut an object, and the second restricting member separates from the second restricting member stopper when the first blade part and the second blade part cut the object.

[0014] (4) The cutting tool according to any one of (1) to (3) above, further comprising an operated part that can be operated by a remote operation tool, the operated part including a linking part to which the remote operation tool is detachably linked, and a distance-varying mechanism connected directly or indirectly to both the first arm part and the second arm part so that the distance between a base end of the first arm part and a base end of the second arm part can be varied.

[0015] (5) The cutting tool according to any one of (1) to (4) above, wherein the object-gripping part further comprises a third gripping member, a second link member that links the first gripping member and the third gripping member, a fourth gripping member, and a third linking member that links the second gripping member and the fourth gripping member.

[0016] (6) The cutting tool according to (5) above, wherein the first gripping member is provided with a first recess capable of accommodating at least part of the third linking member, and the second gripping member is provided with a second recess capable of accommodating at least part of the second link member.

-5[0017] (7) The cutting tool according to any of (1) to (6) above, wherein the first restricting member includes a first collar member capable of rolling relative to the first restricting member stopper, and the second restricting member includes a second collar member capable of rolling relative to the second restricting member stopper.

[0018] (8) The cutting tool according to any one of (1) to (6) above, wherein the first blade body has a first protrusion, the second restricting member including a second contact part capable of coming into contact with the first protrusion, and the second blade body has a second protrusion, the first restricting member including a first contact part capable of coming into contact with the second protrusion.

[0019] (9) The cutting tool according to (2) above, wherein the first restricting member stopper is one member from among the first blade body and the second blade body, and the second restricting member stopper is an operation tool for opening/closing the first blade body and the second blade body.

Effects of the Invention [0020] According to the present invention, it is possible to provide a cutting tool that can cut an object while gripping the object in a simple operation. It is also possible to provide a cutting tool comprising a gripping part that can be adapted to objects of various sizes.

BRIEF DESCRIPTION OF THE DRAWINGS [0021] FIG. 1(A) is a schematic front view that schematically illustrates a cutting tool in a first embodiment. FIG. 1(B) is a schematic rear view that schematically illustrates the cutting tool in the first embodiment. FIG. 1(C) is a schematic bottom view that schematically illustrates the cutting tool in the first embodiment.

[0022] FIG. 2 is a schematic rear view that schematically illustrates the cutting tool in a state of cutting an object.

[0023] FIG. 3 is a schematic rear view that schematically illustrates a cutting tool of a second embodiment.

-6[0024] FIG. 4(A) is a schematic front view that schematically illustrates a cutting tool of a third embodiment. FIG. 4(B) is a schematic bottom view that schematically illustrates the cutting tool of the third embodiment.

[0025] FIG. 5 is a drawing that schematically illustrates an example of the shape of the second gripping member.

[0026] FIG. 6 is a drawing that schematically illustrates an example of the shape of the fourth gripping member.

[0027] FIG. 7 is a schematic bottom view that schematically illustrates a cutting tool of a fourth embodiment.

[0028] FIG. 8 is a schematic bottom view that schematically illustrates a cutting tool of a modification of the fourth embodiment.

[0029] FIG. 9 is a photograph, substituting for a drawing, of an example of the state of the cutting tool when the cutting step is being carried out.

[0030] FIG. 10(A) is a schematic front view that schematically illustrates a cutting tool of a fifth embodiment. FIG. 10(B) is a schematic front view that schematically illustrates the cutting tool of the fifth embodiment. FIG. 10(C) is a schematic bottom view that schematically illustrates the cutting tool of the fifth embodiment.

[0031] FIG. 11(A) is a schematic front view that schematically illustrates a cutting tool of a sixth embodiment. FIG. 11(B) is a schematic front view that schematically illustrates the cutting tool of the sixth embodiment.

[0032] FIG. 11(C) is a schematic front view that schematically illustrates the cutting tool of the sixth embodiment. FIG. 11(D) is a schematic rear view that schematically illustrates the cutting tool of the sixth embodiment. In FIGS. 11(C) and 11(D), the object-gripping part is not shown so that the movements of the first blade body, the second blade body, and the opening/closing operation tool can be perceived.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

-7[0033] Below is a detailed description, made with reference to the drawings, of a cutting tool in an embodiment. In the present specification, members having the same functions are denoted with the same or similar symbols. Descriptions that would be repetitive are sometimes omitted for members denoted with the same or similar symbols.

First Embodiment [0034] The first embodiment is described with reference to FIGS. 1(A) through 2. FIG. 1(A) is a schematic front view that schematically illustrates a cutting tool 1 in the first embodiment. FIG. 1(B) is a schematic rear view that schematically illustrates the cutting tool 1 in the first embodiment. FIG. 1(C) is a schematic bottom view that schematically illustrates the cutting tool 1 in the first embodiment. FIG. 2 is a schematic rear view that schematically illustrates the cutting tool 1 in a state of cutting an object W.

[0035] The cutting tool 1 includes an object-cutting part 2 and an object-gripping part 4, as shown in FIG. 1(A). The object-cutting part 2 and the object-gripping part 4 can be considered an object-cutting tool and an object-gripping tool, respectively. The object-cutting part 2 has a first blade body 12 and a second blade body 22. The object W (e.g., an electric wire or another type of wire) is cut by the first blade body 12 and the second blade body 22 moving relative to each other from an open state toward a closed state. The object-gripping part 4 has a first gripping member 32 and a second gripping member 42. The object W (e.g., an electric wire or another type of wire) is gripped between the first gripping member 32 and the second gripping member 42 by the first gripping member 32 and the second gripping member 42 moving relatively to as to approach each other.

[0036] The object-cutting part 2 and the object-gripping part 4 are linked by a linking member 5. For example, the linking member 5 is disposed so as to pass through a first hole in the first blade body 12, a second hole in the second blade body 22, a third hole in the first gripping member 32, and a fourth hole in the second gripping member 42, and the objectcutting part 2 and the object-gripping part 4 may thereby be linked by the linking member 5. In this case, the first blade body 12, the second blade body 22, the first gripping member 32, and the second gripping member 42 are each capable of rotating about the linking member 5, relative to the linking member 5. The linking member 5 is, for example, a long, thin member disposed as being passed through the aforementioned first hole, second hole, third hole, and fourth hole, all together. The linking member 5 may include a bolt 5a and a nut 5b disposed at the end of the bolt.

-8[0037] The cutting tool 1 includes an urging member 6 that urges the first gripping member 32 and the second gripping member 42 in a closing direction, as shown in FIG. 1(A). The direction in which the first gripping member 32 and the second gripping member 42 are closed is the direction in which a first jaw 36 of the first gripping member and a second jaw 46 of the second gripping member approach each other. Due to the presence of the urging member 6, if there were no members (a first restricting member 35, a second restricting member 45, etc., described hereinafter) to restrict the first gripping member 32 and the second gripping member 42 from moving in the closing direction, the object W disposed between the first jaw 36 and the second jaw 46 would be clamped by the first jaw 36 and the second jaw 46. The clamping force can be set as appropriate by adjusting the urging force of the urging member 6, or more specifically, by adjusting spring strength. In the example illustrated in FIG. 1(A), the urging member 6 is a helical spring (coil spring), but as long the urging member 6 is able to urge the first gripping member 32 and the second gripping member 42 in the closing direction, any sort of member may be used. The urging member 6 may be a torsion coil spring.

[0038] The first blade body 12 has a first hole 14 (refer to FIG. 1(C) if necessary) through which the linking member 5 is inserted, a first blade part 16 disposed on one side (the distal side) of the first hole 14, and a first arm part 18 disposed on the other side (the proximal side) of the first hole 14. The first blade part 16 is farther out to the tip than the first hole 14. The first blade part 16 includes a front portion to which a blade edge 16a is provided, a back portion 16b provided to the side opposite from the front portion, and two side surfaces (which have areas greater than both the area of the front portion and the area of the back portion). The first arm part 18 is nearer to the base end than the first hole 14. The first arm part 18 includes a front portion 18a positioned on the same side as the blade edge 16a, a back portion 18b positioned on a different side from the blade edge 16a, and two side surfaces (which have areas greater than both the area of the front portion and the area of the back portion). The first arm part 18 may be operated directly by an operator, and may be operated indirectly via any desired operative force transmission mechanism (for example, an operated part 90 in the second embodiment, described hereinafter).

[0039] The second blade body 22 has a second hole 24 (refer to FIG. 1(C) if necessary) through which the linking member 5 is inserted, a second blade part 26 disposed on one side (the distal side) of the second hole 24, and a second arm part 28 disposed on the other side (the proximal side) of the second hole 24. The second blade part 26 is farther out to the tip than the second hole 24. The second blade part 26 includes a front portion to which a blade edge 26a is provided, a back portion 26b provided to the side opposite from the front portion,

-9and two side surfaces (which have areas greater than both the area of the front portion and the area of the back portion). The second arm part 28 is nearer to the base end than the second hole 24. The second arm part 28 includes a front portion 28a positioned on the same side as the blade edge 26a, a back portion 28b positioned on a different side from the blade edge 26a, and two side surfaces (which have areas greater than both the area of the front portion and the area of the back portion). The second arm part 28 may be operated directly by an operator, and may be operated indirectly via any desired operative force transmission mechanism (for example, an operated part 90 in the second embodiment, described hereinafter).

[0040] The first restricting member 35 is provided to the first gripping member 32. The first gripping member 32 and the first restricting member 35 may be integrated or may be separate. When the first blade part 16 and the second blade part 26 are in an open state (for example, immediately before the object W is placed between the first blade part 16 and the second blade part 26), the first restricting member 35 is pushed against the first blade body 12 (more specifically, the first arm part 18) due to the urging force (force in the direction indicated by the arrows in FIG. 1(A)) from the urging member 6. In the first embodiment, the first blade body 12 functions as a member (one member) against which the first restricting member 35 is pushed, due to urging force from the urging member 6. Additionally, in the first embodiment, the first blade body 12 functions as a first restricting member stopper that, in resistance to the urging force from the urging member 6, stops the first restricting member 35.

[0041] The second restricting member 45 is provided to the second gripping member 42. The second gripping member 42 and the second restricting member 45 may be integrated or may be separate. When the first blade part 16 and the second blade part 26 are in an open state (for example, immediately before the object W is placed between the first blade part 16 and the second blade part 26), the second restricting member 45 is pushed against the second blade body 22 (more specifically, the second arm part 28) due to the urging force (force in the direction indicated by the arrows in FIG. 1(A)) from the urging member 6. In the first embodiment, the second blade body 22 functions as a member (second member) against which the second restricting member 45 is pushed, due to urging force from the urging member 6. Additionally, in the first embodiment, the second blade body 22 functions as a second restricting member stopper that, in resistance to the urging force from the urging member 6, stops the second restricting member 45.

- 10[0042] In this embodiment, when the first blade part 16 and the second blade part 26 are in the open state (for example, when the first blade part 16 and the second blade part 26 are not in contact with the object W), the first restricting member 35 is pushed against the first blade body 12 and the second restricting member 45 is pushed against the second blade body 22. As a result, the first gripping member 32 and the second gripping member 42 are restricted from moving toward the gripping position where the object W is gripped. In other words, when the first blade part 16 and the second blade part 26 are in the open state, the first gripping member 32 and the second gripping member 42 are also restricted to (maintained in) the open state. Therefore, a worker can very easily perform the work of placing the object W between the first blade part 16 and the second blade part 26 and between the first gripping member 32 and the second gripping member 42.

[0043] In this embodiment, the first gripping member 32 is provided with the first restricting member 35, which is able to come into contact with the first blade body 12, and the second gripping member 42 is provided with the second restricting member 45, which is able to come into contact with the second blade body 22. Therefore, it is possible for the first gripping member 32 to be moved to follow the movement of the first blade body 12, and for the second gripping member 42 to be moved to follow the movement of the second blade body 22. In this embodiment, the mechanism for causing the first gripping member (or the second gripping member) to follow the movement of the first blade body (or the second blade body) is a simple mechanism. Consequently, a reduction in the manufacturing costs of the cutting tool, or an improvement in the reliability of the cutting tool, can be expected.

[0044] In this embodiment, due to the first blade part 16 and the second blade part 26 being moved toward the closed position, the object W is automatically gripped between the first jaw 36 and the second jaw 46 by the urging force from the urging member 6. The object W gripped between the first jaw 36 and the second jaw 46 may be of any size (or diameter, when the object W is a wire). Specifically, as long as the object can be placed between the first blade part 16 and the second blade part 26, the cutting tool 1 can suitably grip and cut an object of any size.

Optional additional configurations [0045] The cutting tool 1 in the first embodiment may include at least one of the optional additional configurations described below. For example, in the example illustrated in FIG. 1(A), the first gripping member 32 has a third hole 34 (refer to FIG. 1(C) if necessary) through which

- 11 the linking member 5 is inserted, the first jaw 36 disposed on one side (the distal side) of the third hole 34, and a first gripping member arm part 38 disposed on the other side (the proximal side) of the third hole 34. The first jaw 36 is farther out to the tip than the third hole 34, and the first gripping member arm part 38 is nearer to the base end than the third hole 34. The abovedescribed first restricting member 35 is provided to the first gripping member arm part 38. When the first blade part 16 and the second blade part 26 are in the open state, the first restricting member 35 comes into contact with the front portion 18a of the first arm part 18.

[0046] The second gripping member 42 has a fourth hole 44 through which the linking member 5 is inserted, the second jaw 46 disposed on one side (the distal side) of the fourth hole 44, and a second gripping member arm part 48 disposed on the other side (the proximal side) of the fourth hole 44 (if necessary, see FIG. 1(C)). The second jaw 46 is farther out to the tip than the fourth hole 44, and the second gripping member arm part 48 is nearer to the base end than the fourth hole 44. The above-described second restricting member 45 is provided to the second gripping member arm part 48. When the first blade part 16 and the second blade part 26 are in the open state, the second restricting member 45 comes into contact with the front portion 28a of the second arm part 28.

[0047] It is assumed that the first arm part 18 and the second arm part 28 are moved towards each other from the state shown in FIG. 1(A), or in other words, that the first blade part 16 and the second blade part 26 are moved towards each other. In this case, until the first jaw 36 reaches the object W, the first restricting member 35 moves to follow the first arm part 18 due to the urging force from the urging member 6. Specifically, a state of contact between the first restricting member 35 and the first arm part 18 is maintained. Similarly, until the second jaw 46 reaches the object W, the second restricting member 45 moves to follow the second arm part 28 due to the urging force from the urging member 6. Specifically, a state of contact between the second restricting member 45 and the second arm part 28 is maintained.

[0048] Furthermore, it is assumed that the first arm part 18 and the second arm part 28 are moved towards each other. Specifically, it is assumed that after the first jaw 36 and the second jaw 46 have come into contact with the object W, the first arm part 18 and the second arm part 28 are further moved towards each other. In this case, because the first jaw 36 and the second jaw 46 are in contact with the object W, the first jaw 36 and the second jaw 46 cannot further move towards each other. On the other hand, the first blade part 16 and the second blade part 26 can further move towards each other by cutting into the object W. As a result, the first restricting member 35 cannot follow the first arm part 18 and separates from the first

- 12 arm part 18 (the front portion 18a of the first arm part). Similarly, the second restricting member 45 cannot follow the second arm part 28 and separates from the second arm part 28 (the front portion 28a of the second arm part).

[0049] FIG. 2 illustrates a state in which the first restricting member 35 has separated from the first arm part 18 and the second restricting member 45 has separated from the second arm part 28. When the first restricting member 35 is able to separate from the first arm part 18 and the second restricting member 45 is able to separate from the second arm part 28, particular effects such as the following are exhibited.

[0050] These particular effects are described in detail below. The object W (for example, an electric wire or another type of wire) is not limited to being arranged along a perfectly straight line. Therefore, there is a possibility that the center of the object W positioned between the first blade part 16 and the second blade part 26, and the center of the object W positioned between the first jaw 36 and the second jaw 46 is eccentric from each other. When the object W is being cut, it is ideal for the object-cutting part 2 and the object-gripping part 4 to be placed in the periphery of the object W so that the longitudinal direction of the object W and the longitudinal direction of the linking member 5 are parallel to each other. However, there is also possibility that the placement of the object-cutting part 2 and the object-gripping part 4 deviates from such an ideal placement. In the example illustrated in FIG. 2, because the first restricting member 35 has separated from the first arm part 18 and the second restricting member 45 has separated from the second arm part 28, the positions of the first gripping member 32 and the second gripping member 42 are automatically adjusted to correspond to the aforementioned eccentricity or deviation from the ideal placement. Specifically, when the object-gripping part 4, including the first gripping member 32 and the second gripping member 42, has gripped the object W, the object-gripping part 4 rotates about the linking member 5, relative to the object-cutting part 2. As a result, the positions of the first gripping member 32 and the second gripping member 42 are automatically adjusted.

[0051] In the embodiment illustrated in FIG. 2, when the first blade part 16 and the second blade part 26 are in the open state, the first restricting member 35 and the first arm part 18 come into contact with each other, and the second restricting member 45 and the second arm part 28 comes into contact with each other. Due to this configuration, the jaws of the objectgripping part 4 follow the movements of the corresponding blade bodies. As a result, the operation of placing the cutting tool 1 in the periphery of the object W, and/or the operation of separating the cutting tool 1 from the object W, can be performed very easily (referred to

- 13below as the first effect). Additionally, when the first blade part 16 and the second blade part 26 cut the object W (at which time the first gripping member 32 and the second gripping member 42 are gripping the object W), the first restricting member 35 separates from the first arm part 18, and the second restricting member 45 separates from the second arm part 28. Due to this configuration, the object-gripping part 4, while having gripped the object W, is capable of rotating about the linking member 5, relative to the object-cutting part 2. As a result, the object W can be cut without difficulty even when the object W is not arranged along a perfectly straight line, or even when the cutting tool 1 is arranged at a slight slant relative to the object W (referred to below as the second effect). As described above, in the embodiment illustrated in FIG. 2, the first restricting member 35 is capable of coming into contact with and separating from the first arm part 18, and the second restricting member 45 is capable of coming into contact with and separating from the second arm part 28. Due to this configuration, the embodiment illustrated in FIG. 2 synergistically exhibits the first effect and the second effect.

Second Embodiment [0052] The second embodiment is described with reference to FIG. 3. FIG. 3 is a schematic rear view that schematically illustrates the cutting tool 1 in the second embodiment. The cutting tool 1 of the second embodiment differs from the cutting tool of the first embodiment by additionally comprising an operated part 90 that can be operated by a remote operation tool. In other aspects, the cutting tool 1 of the second embodiment is the same as the cutting tool of the first embodiment. Therefore, in the description of the second embodiment, repetitive descriptions of configurations other than that of the operated part 90 are omitted.

[0053] The operated part 90 includes a linking part 92 and a distance-varying mechanism 95, as shown in FIG. 3. A remote operation tool (not shown) is detachably linked to the linking part 92. The distance-varying mechanism 95 varies the distance between the base end of the first arm part 18 and the base end of the second arm part 28, and the distance-varying mechanism 95 is connected to both the first arm part 18 and the second arm part 28.

[0054] In the example illustrated in FIG. 3, the linking part 92 includes a coupling member 93 to which the remote operation tool is attached, and an operation member 94 operated by the remote operation tool. The operation member 94 includes, for example, a hexagonal part 94a that has a hexagonal cross section. The hexagonal part 94a is the portion operated by the remote operation tool.

- 14 [0055] In the example illustrated in FIG. 3, a moving member 96 of the distance-varying mechanism 95 is connected to the first arm part 18, and a base member 97 of the distancevarying mechanism 95 is connected to the second arm part 28. Due to the operation member 94 being operated, the moving member 96 moves relative to the base member 97. The distance-varying mechanism 95 may include, for example, a threaded rod 98. When the distance-varying mechanism 95 includes a threaded rod 98, the operation member 94 rotates due to the operation member 94 being operated. As a result, the moving member 96, which is threadably engaged with the threaded rod 98, moves relative to the base member 97. Thus, the first arm part 18 and the second arm part 28 can be remotely operated via the operated part 90.

[0056] When the cutting tool 1 of the second embodiment is used, it is possible to suitably cut an object W that is not directly touched by the worker's hands. For example, wiring placed in a high location can be suitably cut. When the cutting tool 1 is operated using the remote operation tool, the cutting tool is preferably configured to be operable in a simple manner. In the cutting tool 1 of the second embodiment, the first restricting member 35, which can come into contact with the first arm part 18, is provided to the first gripping member, and the second restricting member 45, which can come into contact with the second arm part 28, is provided to the second gripping member. As a result, the object W can be gripped and cut in a simple operation. In the second embodiment, due to the cutting tool including the first restricting member 35, the second restricting member 45, and the operated part 90, an object W positioned relatively far away can be gripped and cut in a simple operation, regardless of the mechanism being simple.

Third Embodiment [0057] A third embodiment is described with reference to FIGS. 4(A) and 4(B). FIG. 4(A) is a schematic front view that schematically illustrates the cutting tool 1 of the third embodiment. FIG. 4(B) is a schematic bottom view that schematically illustrates the cutting tool 1 of the third embodiment. In the cutting tool 1 of the third embodiment, members having the same functions as those of the cutting tool of the first embodiment (or the cutting tool of the second embodiment) are denoted by the same symbols. Repetitive descriptions are omitted for members denoted by the same symbols.

[0058] As shown in FIGS. 4(A) and 4(B), in the cutting tool 1 of the third embodiment, the object-gripping part 4 includes a third gripping member 132 and a fourth gripping member 142

- 15in addition to the first gripping member 32 and the second gripping member 42. As shown in FIG. 4(B), the first gripping member 32 and the third gripping member 132 are linked via a second linking member 51, and the first gripping member 32 and the third gripping member 132 can turn about the linking member 5. The second linking member 51 may be a long, thin member (e.g., a bolt) disposed so as to pass through a hole in the first gripping member 32 and a hole in the third gripping member 132. In the example illustrated in FIG. 4(B), a first spacer 55 is disposed around the periphery of the second linking member 51, and a gap between the first gripping member 32 and the third gripping member 132 is maintained at a predetermined gap by the first spacer 55.

[0059] Similarly, the second gripping member 42 and the fourth gripping member 142 are linked via a third linking member 52, and the second gripping member 42 and the fourth gripping member 142 can turn about the linking member 5. The third linking member 52 may be a long, thin member (e.g., a bolt) disposed so as to pass through a hole in the second gripping member 42 and a hole in the fourth gripping member 142. In the example illustrated in FIG. 4(B), a second spacer 56 is disposed in the periphery of the third linking member 52, and a gap between the second gripping member 42 and the fourth gripping member 142 is maintained at a predetermined gap by the second spacer 56.

[0060] The third gripping member 132 is linked to the first gripping member 32 via the second linking member 51. Therefore, the third gripping member 132, in the same manner as the first gripping member 32, is urged in a closing direction (a direction toward the fourth gripping member). Additionally, the fourth gripping member 142 is linked to the second gripping member 42 via the third linking member 52. Therefore, the fourth gripping member 142, in the same manner as the second gripping member 42, is urged in a closing direction (a direction toward the third gripping member). These instances of urging are due to the urging member 6.

[0061] In the example illustrated in FIG. 4(B), the urging member 6 is a torsion coil spring, but the urging member 6 may be a coil spring or other urging member. From a standpoint such as reducing the size of the cutting tool 1, the urging member 6 (e.g., a torsion coil spring) may be disposed around the periphery of the linking member 5 (see FIG. 4(B)). The torsion coil spring may be disposed so that one end of the torsion coil spring comes into contact with the second linking member 51 or the first spacer 55 and the other end of the torsion coil spring comes into contact with the third linking member 52 or the second spacer 56.

- 16[0062] When the cutting tool 1 of the third embodiment is used, the object W is gripped by a third jaw 136 (or gripping surface) of the third gripping member 132 and a fourth jaw 146 (or gripping surface) of the fourth gripping member 142, in addition to the first jaw (or gripping surface) of the first gripping member 32 and the second jaw (or gripping surface) of the second gripping member 42. Therefore, the object W is held more stably than in the first embodiment (or the second embodiment).

Optional additional configurations [0063] The cutting tool 1 in the third embodiment may include at least one of the optional additional configurations described below.

[0064] For example, the second gripping member 42 may be provided with a second recess 421 capable of accommodating at least part of the second linking member 51, as shown in FIGS. 4(A) and 5. The second recess 421 can accommodate at least part of the second linking member 51 when the first blade part 16 and the second blade part 26 are in a furthest open state. Similarly, the first gripping member 32 may be provided with a first recess 321 capable of accommodating at least part of the third linking member 52. The first recess 321 can accommodate at least part of the third linking member 52 when the first blade part 16 and the second blade part 26 are in a furthest open state. Due to the presence of the first recess 321 and the second recess 421, the third gripping member 132 and the fourth gripping member 142 can be spread apart even further.

[0065] The first restricting member 35 may include a first collar member 35a capable of rolling relative to the first arm part 18. Similarly, the second restricting member 45 may include a second collar member 45a capable of rolling relative to the second arm part 28. When a restricting member includes a collar member capable of rolling, friction resistance between the restricting member (the first restricting member or the second restricting member) and the arm part (the first arm part or the second arm part) is reduced. In the example illustrated in FIG. 4(B), the first collar member 35a is rotatably disposed in the periphery of a bolt or other long, thin member 37, and the second collar member 45a is rotatably disposed in the periphery of a bolt or other long, thin member 47. This configuration, in which the first restricting member 35 includes a first collar member capable of rolling and the second restricting member 45 includes a second collar member capable of rolling, can be employed in other embodiments as well.

- 17 [0066] The length of the fourth gripping member 142 (the length between the base end and the tip end) is less than the length of the second gripping member 42 (the length between the base end and the tip end), as shown in FIGS. 5 and 6. Similarly, the length of the third gripping member 132 (the length between the base end and the tip end) is less than the length of the first gripping member 32 (the length between the base end and the tip end). Alternatively, the length of the fourth gripping member 142 may be equal to the length of the second gripping member 42. In this case, the base end part of the second gripping member 42 and the base end part of the fourth gripping member 142 may be linked by a bolt or another long, thin member. Similarly, the length of the third gripping member 132 may be equal to the length of the first gripping member 32. In this case, the base end part of the first gripping member 32 and the base end part of the third gripping member 132 may be linked by a bolt or another long, thin member.

[0067] In the example illustrated in FIGS. 4(A) and 4(B), the cutting tool 1 includes an operated part 90 that can be operated by a remote operation tool. Alternatively, the cutting tool 1 of the third embodiment need not include an operated part 90 that can be operated by a remote operation tool.

Fourth Embodiment [0068] The fourth embodiment is described with reference to FIG. 7. FIG. 7 is a schematic bottom view that schematically illustrates the cutting tool 1 of the fourth embodiment. In the cutting tool 1 of the fourth embodiment, the first gripping member 32 and the second gripping member 42 are disposed so as to face the first blade body 12, and in this respect, said members are similar to the same members of the cutting tools of the first through third embodiments. On the other hand, in the cutting tool 1 of the fourth embodiment, the first gripping member 32' and the second gripping member 42' are disposed so as to face the second blade body 22, and in this respect, said members are different from the same members of the cutting tools of the first through third embodiments. Specifically, in the cutting tool 1 of the fourth embodiment, object-gripping parts (a first gripping member and a second gripping member) are disposed on both sides of the object-cutting part. The first restricting member 35 is provided between two first gripping members (32, 32'), and the second restricting member 45 is provided between two second gripping members (42, 42').

- 18[0069] In the fourth embodiment, the object-gripping parts are disposed on both sides of the object-cutting part. Therefore, each piece of the object W that has been divided in two by the cutting step is suitably gripped by the corresponding object-gripping part.

Modification of Fourth Embodiment [0070] A modification of the fourth embodiment is described with reference to FIG. 8. FIG. 8 is a schematic bottom view that schematically illustrates the cutting tool 1 in a modification of the fourth embodiment. The cutting tool 1 of the modification differs from the cutting tool of the fourth embodiment in that first restricting members (35, 35') are respectively provided to two first gripping members (32, 32'), and second restricting members (45, 45') are respectively provided to two second gripping members (42, 42'). In the cutting tool 1 of the modification, the distance between the linking member 5 and one first restricting member 35 differs from the distance between the linking member 5 and the other first restricting member 35'. Similarly, the distance between the linking member 5 and one second restricting member 45 differs from the distance between the linking member 5 and the other second restricting member 45'. Therefore, in the cutting tool 1 of the modification, it is possible for the relative rotational angle (the rotational angle about the linking member 5) of the object-gripping parts on one side (the first gripping member 32 and the second gripping member 42), relative to the object-cutting part, and the relative rotational angle of the object-gripping parts on the other side (the first gripping member 32' and the second gripping member 42'), relative to the object-cutting part, to be different from each other. As a result, the object W can be cut without difficulty even when the object W is not arranged along a perfectly straight line, or even when the cutting tool 1 is arranged at a slight slant relative to the object W.

[0071] Though not shown in FIGS. 7 and 8, at least one of the two object-gripping parts (the first gripping member 32 and the second gripping member 42, as well as the first gripping member 32' and the second gripping member 42') may be the object-gripping parts of the third embodiment, in which the third gripping member and the fourth gripping member are provided to the outer sides.

[0072] FIG. 9 is a photograph substituting for a drawing. FIG. 9 is a photograph of one example of a state of the cutting tool while the cutting step is being carried out.

Fifth Embodiment

- 19[0073] The fifth embodiment is described with reference to FIGS. 10(A) to 10(C). FIG. 10(A) is a schematic front view that schematically illustrates the cutting tool 1 of the fifth embodiment. In FIG. 10(A), the first blade body 12 and the second blade body 22 are in the open state. FIG. 10(B) is a schematic front view that schematically illustrates the cutting tool 1 of the fifth embodiment. In FIG. 10(B), the first blade body 12 and the second blade body 22 are in the closed state (in other words, the state during execution of the cutting process). FIG. 10(C) is a schematic bottom view that schematically illustrates the cutting tool 1 of the fifth embodiment. In the cutting tool 1 of the fifth embodiment, members having the same functions as those of the cutting tool of the first embodiment, second embodiment, or third embodiment are denoted by the same symbols. Repetitive descriptions are omitted for members denoted by the same symbols.

[0074] In the fifth embodiment, the shape and structure of the first restricting member 35 differ from the shape and structure of the first restricting member 35 of the first embodiment, and the shape and structure of the second restricting member 45 differ from the shape and structure of the second restricting member 45 of the first embodiment.

[0075] In the first through fourth embodiments, the first restricting member 35 is configured to be pushed against the first blade body 12 by the urging force from the urging member 6. In contrast, in the fifth embodiment, the first restricting member 35 is configured to be pushed against the second blade body 22 by the urging force from the urging member 6. Additionally, in the fifth embodiment, the second restricting member 45 is configured to be pushed against the first blade body 12 by the urging force from the urging member 6.

[0076] One example of the fifth embodiment is described in further detail. As shown in FIG. 10(A), the first restricting member 35 includes a first contact part that can come into contact with a second protrusion 23 (e.g., a second pin) of the second blade body 22. The first contact part may have a shape that is substantially complementary to the shape (a curved surface shape) of the surface of the second protrusion 23. In the example illustrated in FIG. 10(A), the first restricting member 35 and the first gripping member 32 are formed integrally, but the first restricting member 35 and the first gripping member 32 may be formed separately and connected to each other. Additionally, in the example illustrated in FIG. 10(A), the second protrusion 23 and the second blade body 22 are formed integrally, but the second protrusion 23 and the second blade body 22 may be formed separately and connected to each other.

-20[0077] Similarly, the second restricting member 45 includes a second contact part that can come into contact with a first protrusion 13 (e.g., a first pin) of the first blade body 12. The second contact part may have a shape that is substantially complementary to the shape (a curved surface shape) of the surface of the first protrusion 13. In the example illustrated in FIG. 10(A), the second restricting member 45 and the second gripping member 42 are formed integrally. Additionally, the first protrusion 13 and the first blade body 12 are formed integrally.

[0078] As shown in FIG. 10(A), when the first blade part 16 and the second blade part 26 are in the open state, the first restricting member 35 is in contact with the second blade body 22 (more specifically, the second protrusion 23 provided to the second blade part 26). That is, the second blade body 22 functions as a member (one member) pushed by the first restricting member 35 due to the urging force from the urging member 6. The second blade body 22 can be considered to function as a first restricting member stopper that, in resistance to the urging force from the urging member 6, stops the first restricting member 35. Additionally, when the first blade part 16 and the second blade part 26 are in the open state, the second restricting member 45 is in contact with the first blade body 12 (more specifically, the first protrusion 13 provided to the first blade part 16). That is, the first blade body 12 functions as a member (second member) pushed by the second restricting member 45 due to the urging force from the urging member 6. The first blade body 12 can be considered to function as a second restricting member stopper that, in resistance to the urging force from the urging member 6, stops the second restricting member 45.

[0079] As shown in FIG. 10(B), the first restricting member 35 separates from the second blade body 22 (i.e., the aforementioned one member) when the first blade part 16 and the second blade part 26 cut the object. Additionally, the second restricting member 45 separates from the first blade body 12 (i.e., the aforementioned second member) when the first blade part 16 and the second blade part 26 cut the object.

[0080] In the example illustrated in FIGS. 10(A) to 10(C), the first protrusion 13 is disposed on the side surface of the first blade body 12 and provided so as to protrude in a direction perpendicular to the side surface of the first blade body 12. Alternatively, the first protrusion may be disposed on the back portion 16b of the first blade body 12. That is, the first protrusion may be provided so as to protrude outward from the back surface of the first blade body 12. In this case, due to the devised shape of the second restricting member 45, the urging force from the urging member 6 would cause the second restricting member 45 to push against the

-21 first protrusion disposed on the back portion 16b. Additionally, in the example illustrated in FIGS. 10(A) to 10(C), the second protrusion 23 is disposed on the side surface of the second blade body 22 and provided so as to protrude in a direction perpendicular to the side surface of the second blade body 22. Alternatively, the second protrusion may be disposed on the back portion 26b of the second blade body 22. In this case, due to the devised shape of the first restricting member 35, the urging force from the urging member 6 would cause the first restricting member 35 to push against the second protrusion disposed on the back portion 26b.

[0081] In the example illustrated in FIGS 10(A) to 10(C), the blade bodies (12; 22) include protrusions (13; 23), and the restricting members (35; 45) are recessed members. Alternatively, the blade bodies (12; 22) may include recessed portions, and the restricting members (35; 45) may include protrusions.

[0082] The cutting tool 1 of the fifth embodiment exhibits the same effects as the cutting tools of the first embodiment, the second embodiment, and the third embodiment. The configuration of the fourth embodiment may be combined with the cutting tool of the fifth embodiment.

[0083] In the first through fifth embodiments, the first restricting member causes the movement of the first gripping member to follow the movement of the blade body (the first blade body or the second blade body), through cooperation with the contact part (18a; 13) provided to the blade body. Similarly, the second restricting member causes the movement of the second gripping member to follow the movement of the blade body (the first blade body or the second blade body), through cooperation with the contact part (28a; 23) provided to the blade body. In the first through fifth embodiments, the front portions of the arm parts and the protrusions are given as examples of contact parts, but the contact parts may be other forms as long as such forms can cause the movements of the first restricting member and second restricting member to follow the movements of the blade bodies.

Sixth Embodiment [0084] A sixth embodiment is described with reference to FIGS. 11(A) to 11(D). FIG. 11(A) is a schematic front view that schematically illustrates the cutting tool 1 of the sixth embodiment. In FIG. 11(A), the first blade body 12 and the second blade body 22 are in the state prior to cutting the object (in other words, the open state). FIG. 11 (B) is a schematic front

-22view that schematically illustrates the cutting tool 1 of the sixth embodiment. In FIG. 11 (B), the first blade body 12 and the second blade body 22 are in a closed state (in other words, the state while executing the cutting process). FIGS. 11(C) and 11(D) are schematic front views that schematically illustrate the cutting tool 1 of the sixth embodiment. In FIGS. 11(C) and 11(D), the object-gripping part 4 is not illustrated so that the movements of the first blade body 12, the second blade body 22, and an opening/closing operation tool 500 can be perceived. FIG. 11(C) shows the state prior to cutting the object W. FIG. 11(D) shows the state after cutting the object W. In the cutting tool 1 of the sixth embodiment, members having the same functions as those of the cutting tool of the first embodiment, second embodiment, third embodiment, fourth embodiment, or fifth embodiment are denoted by the same symbols. Repetitive descriptions are omitted for members denoted by the same symbols.

[0085] In the sixth embodiment, the second restricting member stopper for stopping the second restricting member 45 differs from the same member of the first through fifth embodiments in that this member is not a second member of the first blade body 12 and the second blade body 22, but is the operation tool 500 for opening/closing the first blade body 12 and the second blade body 22. In the example illustrated in FIG. 11(A), the second restricting member stopper for stopping the second restricting member 45 is a second operation rod 520.

[0086] The opening/closing operation tool 500 shall be described in further detail. The opening/closing operation tool 500 includes a first operation rod 510 and the second operation rod 520. The opening/closing operation tool 500 may include a link member 530.

[0087] In the example illustrated in FIG. 11(A), the first operation rod 510 is fixed to the first arm part 18. The first operation rod 510 may be immobilized against moving relative to the first arm part 18. In the example illustrated in FIG. 11(A), the first operation rod 510 is fixed to the first arm part 18 by a fastening member 511 (e.g., a first bolt 511a and a second bolt 511b). The first operation rod 510 is a member that controls the movement of the first blade body 12, or in other words, a member that operates the first blade body 12.

[0088] The second operation rod 520 is a member that controls the movement of the second blade body 22, or in other words, a member that operates the second blade body 22. In the example illustrated in FIG. 11(A), the second operation rod 520 is fixed to the second arm part 28 of the second blade body 22 via the link member 530. More specifically, the second operation rod 520 and the link member 530 are pivotably linked to each other, and the link member 530 and the second arm part 28 are pivotably linked to each other. In other

-23words, the second operation rod 520 and the link member 530 are capable of relative rotation about a shaft 532, and the link member 530 and the second arm part 28 are capable of relative rotation about a shaft 533.

[0089] Additionally, the second operation rod 520 is fixed also to the first blade body 12. More specifically, the second operation rod 520 is pivotably linked to the first blade body 12. Therefore, the second operation rod 520 and the first blade body 12 are capable of relative rotation about a shaft 531.

[0090] As shown in FIG. 11(A), when the first blade body 12 and the second blade body 22 are in the state prior to cutting the object W (in other words, the open state), the second restricting member 45 is pushed against the opening/closing operation tool 500 by the urging force from the urging member. More specifically, the second restricting member 45 is pushed against the second operation rod 520 (e.g., a surface 520a of the second operation rod 520 that faces the second restricting member 45) by the urging force from the urging member. In FIGS. 11(A) to 11(D), the urging member is not illustrated in order to avoid making the drawings complicated.

[0091] When the first blade body 12 and the second blade body 22 are in the state prior to cutting the object W (in other words, the open state), the first restricting member 35 is pushed against the first arm part 18 by the urging force from the urging member. Alternatively, the first restricting member 35 may be pushed against the opening/closing operation tool 500 (e.g., the first operation rod 510).

[0092] In the example illustrated in FIG. 11(A), the opening/closing operation tool 500 (e.g., the second operation rod 520) functions as a second restricting member stopper for stopping the second restricting member 45, and the first blade body 12 (e.g., the first arm part 18) functions as a first restricting member stopper for stopping the first restricting member 35. Alternatively, the opening/closing operation tool 500 may function as a first restricting member stopper for stopping the first restricting member 35, and the second blade body 22 may function as a second restricting member stopper for stopping the second restricting member 45. Alternatively, one part of the opening/closing operation tool 500 may function as a first restricting member stopper for stopping the first restricting member 35, and another part of the opening/closing operation tool 500 may function as a second restricting member stopper for stopping the second restricting member 45.

-24[0093] As shown in FIG. 11(B), it is presumed that the opening/closing operation tool 500 (more specifically, the first operation rod 510 and the second operation rod 520) is operated to execute the process of cutting the object W, using the first blade body 12 and the second blade body 22. During the process of cutting the object W, the object-gripping part 4 grips the object W. The first gripping member 32 and the second gripping member 42 can then no longer follow the movement of the first blade body 12 and the second blade body 22. As a result, the first restricting member 35 separates from the first restricting member stopper (e.g., the first arm part 18), and the second restricting member 45 separates from the second restricting member stopper (e.g., the second operation rod 520). Due to this configuration, the object-gripping part 4 is able to rotate about the linking member 5, relative to the object-cutting part 2, while gripping the object W. As a result, the object W can be cut without difficulty even when the object W is not arranged along a perfectly straight line, or even when the cutting tool 1 is arranged at a slight slant relative to the object W.

[0094] FIG. 11(C) corresponds to the omitted illustration of the object-gripping part 4 in FIG. 11(A), and FIG. 11(D) corresponds to the omitted illustration of the object-gripping part 4 in FIG. 11(B). The movements of the first blade body 12, the second blade body 22, and the opening/closing operation tool 500 can be perceived by referring to FIGS. 11(C) and 11(D).

[0095] The cutting tool 1 of the sixth embodiment exhibits the same effects as the cutting tools of the first through fifth embodiments. Additionally, because a link member is included, the operations of opening and closing the cutting tool 1 can be performed with less force.

[0096] When the cutting tool 1 of the sixth embodiment is operated by a separate remote operation tool, the operated part 90 (more specifically, the distance-varying mechanism 95) described in the second embodiment is preferably connected to both the first operation rod 510 and the second operation rod 520. In this case, the operated part 90 (the distance-varying mechanism 95) would be indirectly connected to both the first arm part 18 and the second arm part 28. Alternatively, the operated part 90 (more specifically, the distance-varying mechanism 95) described in the second embodiment may be connected to both the first arm part 18 and the second operation rod 520. That is, when the cutting tool 1 of the sixth embodiment is operated by a separate remote operation tool, the distance-varying mechanism 95 is preferably connected directly or indirectly to both the first arm part 18 and the second arm part 28.

-25INDUSTRIAL APPLICABILITY [0097] When the cutting tool of the present invention is used, an object can be cut while the object is gripped in a simpler operation. Therefore, this cutting tool is useful for a person who installs objects, repairs objects, or removes objects.

KEY [0098] 1: cutting tool, 2: object-cutting part, 4: object-gripping part, 5: linking member, 5a:

bolt, 5b: nut, 6: urging member, 12: first blade body, 13: first protrusion, 14: first hole, 16: first blade part, 16a: blade edge, 16b: back portion, 18: first arm part, 18a: front portion, 18b: back portion, 22: second blade body, 23: second protrusion, 24: second hole, 26: second blade part, 26a: blade edge, 26b: back portion, 28: second arm part, 28a: front portion, 28b: back portion, 32: first gripping member, 32': first gripping member, 34: third hole, 35: first restricting member, 35': first restricting member, 35: first restricting member, 35a: first collar member, 36: first jaw, 37: long, thin member, 38: first gripping member arm part, 42: second gripping member, 42': second gripping member, 44: fourth hole, 45: second restricting member, 45': second restricting member, 45: second restricting member, 45a: second collar member, 46: second jaw, 47: long, thin member, 48: second gripping member arm part, 51: second linking member, 52: third linking member, 55: first spacer, 56: second spacer, 90: operated part, 92: linking part, 93: coupling member, 94: operation member, 94a: hexagonal part, 95: distancevarying mechanism, 96: moving member, 97: base member, 98: threaded rod, 132: third gripping member, 136: third jaw, 142: fourth gripping member, 146: fourth jaw, 321: first recess, 421: second recess, 500: opening/closing operation tool, 510: first operation rod, 511: fastening member, 511a: first bolt, 511b: second bolt, 520: second operation rod, 520a: surface facing second restricting member, 530: link member, 531: shaft, 532: shaft, 533: shaft, W: object

Claims

1. A cutting tool, comprising:

an object-cutting part having a first blade body and a second blade body;

2. The cutting tool according to claim 1, wherein the first restricting member stopper is one member from among the first blade body and the second blade body, or is an operation tool for opening/closing the first blade body and the second blade body; and the second restricting member stopper is another member from among the first blade body and the second blade body, or is an operation tool for opening/closing the first blade body and the second blade body.

3.

The cutting tool according to claim 1, wherein

-27the first restricting member comes into contact with the first restricting member stopper when the first blade part and the second blade part are in the open state, the second restricting member comes into contact with the second restricting member stopper when the first blade part and the second blade part are in the open state, the first restricting member separates from the first restricting member stopper when the first blade part and the second blade part cut an object, and the second restricting member separates from the second restricting member stopper when the first blade part and the second blade part cut the object.

4. The cutting tool according to any one of claims 1 to 3, further comprising an operated part that can be operated by a remote operation tool, the operated part including a linking part to which the remote operation tool is detachably linked, and a distance-varying mechanism connected directly or indirectly to both the first arm part and the second arm part so that the distance between a base end of the first arm part and a base end of the second arm part can be varied.

5. The cutting tool according to any one of claims 1 to 4, wherein the object-gripping part further comprises a third gripping member, a second link member that links the first gripping member and the third gripping member, a fourth gripping member, and a third linking member that links the second gripping member and the fourth gripping member.

6. The cutting tool according to claim 5, wherein the first gripping member is provided with a first recess capable of accommodating at least part of the third linking member, and the second gripping member is provided with a second recess capable of accommodating at least part of the second link member.

7. The cutting tool according to any of claims 1 to 6, wherein the first restricting member includes a first collar member capable of rolling relative to the first restricting member stopper, and the second restricting member includes a second collar member capable of rolling

-28relative to the second restricting member stopper.

8. The cutting tool according to any one of claims 1 to 6, wherein the first blade body has a first protrusion, the second restricting member including a second contact part capable of coming into contact with the first protrusion, and the second blade body has a second protrusion, the first restricting member including a first contact part capable of coming into contact with the second protrusion.

9. The cutting tool according to claim 2, wherein the first restricting member stopper is one member from among the first blade body and the second blade body, and the second restricting member stopper is an operation tool for opening/closing the first blade body and the second blade body.