阅读说明：本技术 间接火线工程用把持工具 (Holding tool for indirect live wire engineering ) 是由 永木孝幸 岩间保 于 2019-09-13 设计创作，主要内容包括：本发明提供一种能够在把持部的中央部及前端部把持多种把持对象物的间接火线工程用把持工具。间接火线工程用把持工具(10)具有绝缘操作杆(14)、把持部(12)、辅助绝缘操作杆(24)和把持操作部(26)。把持部(12)具有可动把持部(20)和固定把持部(22)。固定把持部(22)和可动把持部(20)分别具有基端部(22a、20a)、中央部(22b、20b)、前端部(22c、20c)。中央部(22b、20b)分别是在包含绝缘操作杆(14)的轴线方向(A)的面(V)方向的内侧与把持对象物(84)抵接的部分,并具有以形成从基端部侧朝向前端部侧连续地在面(V)方向上屈折或弯曲的波形的方式,向外凹陷的第一凹部(22b1s、20b1s)及向内突出的第一凸部(22b1t、20b1t)。(The invention provides a gripping tool for indirect firing line engineering, which can grip a plurality of gripping objects at the central part and the front end part of a gripping part. The holding tool (10) for indirect firing line engineering comprises an insulating operating rod (14), a holding part (12), an auxiliary insulating operating rod (24) and a holding operating part (26). The grip portion (12) has a movable grip portion (20) and a fixed grip portion (22). The fixed grip portion (22) and the movable grip portion (20) have base end portions (22a, 20a), center portions (22b, 20b), and tip end portions (22c, 20c), respectively. The center portions (22b, 20b) are portions that abut against an object to be gripped (84) on the inner side in the direction of a plane (V) including the axial direction (A) of the insulated operating rod (14), and each have first concave portions (22b1s, 20b1s) that are recessed outward and first convex portions (22b1t, 20b1t) that protrude inward so as to form a wave shape that continuously bends or curves in the direction of the plane (V) from the base end side toward the front end side.)

1. A holding tool for indirect firing line engineering, comprising:

an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body;

a grip portion provided at a tip end of the insulating operation rod in an axial direction, the grip portion including a movable grip portion and a fixed grip portion that are separated from each other by an operation of the grip operation portion provided on the insulating operation rod;

an insulating auxiliary insulating operation rod for assisting the approaching and separating action of the holding part connected with the front end;

a grip operation part which is attached near a base end part of the insulating operation rod, is rotatably connected to a base end part of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in a longitudinal direction thereof by a lever action,

the fixed grip portion includes:

a base end portion connected to a front end of the insulated operating rod; a central portion arranged at the base end portion and formed in a substantially arc shape protruding outward in a plane direction including an axial direction of the insulating operation rod; a front end portion arranged in the central portion,

the central portion of the fixed grip portion is a portion that abuts against the object to be gripped on the inner side in the plane direction, and has a first concave portion that is concave outward and a first convex portion that is convex inward so as to form a wave shape that continuously bends or curves in the plane direction from the base end portion side toward the distal end portion side,

the movable gripping portion includes:

a base end portion rotatably connected to a front end of the auxiliary insulating operation rod; a central portion arranged at the base end portion and formed in a substantially arc shape that is convex outward in the surface direction, which is a direction opposite to a convex direction of the central portion of the fixed grip portion; a front end portion arranged in the central portion,

the proximal end portion is pivotally connected to the proximal end portion of the fixed grip portion via a pivot so as to be movable toward and away from the fixed grip portion by operation of the grip operation portion,

the central portion of the movable gripping portion is a portion that abuts against an object to be gripped on the inner side in the plane direction, and has a first concave portion that is concave outward and a first convex portion that is convex inward so as to form a wave shape that continuously bends or curves in the plane direction from the base end portion side toward the distal end portion side,

the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion are formed to be substantially parallel to each other when the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion are in contact with each other.

2. The holding tool for indirect firing line engineering according to claim 1, wherein,

the central portion of the fixed grip portion further has second concave portions which are arranged on the front end portion side of the first convex portion of the central portion of the fixed grip portion and are concaved outward in such a manner as to form a wave shape which is bent or curved in the plane direction,

the central portion of the movable grip portion further has second concave portions which are arranged on the distal end portion side of the first convex portion in the central portion of the movable grip portion and are recessed outward so as to form a wave shape that is bent or curved in the plane direction.

3. A holding tool for indirect firing line engineering, comprising:

an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body;

a grip portion provided at a tip end of the insulating operation rod in an axial direction, the grip portion including a movable grip portion and a fixed grip portion that are separated from each other by an operation of the grip operation portion provided on the insulating operation rod;

an insulating auxiliary insulating operation rod for assisting the approaching and separating action of the holding part connected with the front end;

a grip operation part which is attached near a base end part of the insulating operation rod, is rotatably connected to a base end part of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in a longitudinal direction thereof by a lever action,

the fixed grip portion includes:

a base end portion connected to a front end of the insulated operating rod; a central portion arranged at the base end portion and formed in a substantially arc shape protruding outward in a plane direction including an axial direction of the insulating operation rod; a front end portion arranged in the central portion,

the movable gripping portion includes:

a base end portion rotatably connected to a front end of the auxiliary insulating operation rod; a central portion arranged at the base end portion and formed in a substantially arc shape that is convex outward in the surface direction, which is a direction opposite to a convex direction of the central portion of the fixed grip portion; a front end portion arranged in the central portion,

the proximal end portion is pivotally connected to the proximal end portion of the fixed grip portion via a pivot so as to be movable toward and away from the fixed grip portion by operation of the grip operation portion,

a distal end portion of the movable grip portion and a distal end portion of the fixed grip portion are formed so as to be substantially parallel to each other when the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion are in contact with each other,

the front end portion of the fixed grip portion has a convex portion protruding inward and a concave portion recessed outward in such a manner as to form a wave shape curved in the plane direction,

the front end portion of the movable grip portion has a concave portion that is concave outward and a convex portion that is convex inward so as to form a wave shape that curves in the plane direction,

the convex portion of the distal end portion of the fixed grip portion and the concave portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion,

the concave portion of the distal end portion of the fixed grip portion and the convex portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion.

4. The holding tool for indirect firing line engineering according to claim 2, wherein,

the front end portion of the fixed grip portion has a convex portion protruding inward and a concave portion recessed outward in such a manner as to form a wave shape curved in the plane direction,

the front end portion of the movable grip portion has a concave portion that is concave outward and a convex portion that is convex inward so as to form a wave shape that curves in the plane direction,

the convex portion of the distal end portion of the fixed grip portion and the concave portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion,

the concave portion of the distal end portion of the fixed grip portion and the convex portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion.

Technical Field

The invention relates to a holding tool for indirect firing line engineering.

Background

Conventionally, in a grip tool for an indirect firing line process called an insulating tong, a grip portion is provided at a distal end of an insulating operation rod. The gripping portion of the insulating clamp is composed of a fixed gripping portion and a movable gripping portion, and the movable gripping portion rotates toward the fixed gripping portion to grip an object to be gripped by gripping a tip end portion of the gripping portion. That is, the insulating clamp is used to hold an object to be held at a distal end portion of a holding portion (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 7-298436.

Disclosure of Invention

Problems to be solved by the invention

In the conventional insulating pliers, when the object to be gripped is an electric wire having a very large diameter, the angle at which the distal end portion of the gripping portion opens increases, and when the distal end portion of the fixed gripping portion and the distal end portion of the movable gripping portion are at an angle of such a degree that they do not face each other, there is a problem that the object to be gripped cannot be gripped.

In the conventional insulating clamp, it is not assumed that the object to be gripped is gripped so as to be sandwiched between the central portions of the gripping portions.

Therefore, when it is necessary to grip a gripping target object having a large diameter to the extent that the gripping target object cannot be gripped by the distal end portion of the gripping portion, it is necessary to prepare a larger insulating clamp or prepare a so-called insulating hook capable of gripping the gripping target object by sandwiching it through the central portion of the gripping portion.

Therefore, an object of the present invention is to provide a gripping tool for indirect firing line work, which can grip a plurality of types of gripping objects at the center and the tip of a gripping portion.

Means for solving the problems

The holding tool for indirect firing line engineering of the present invention comprises: an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body; a grip portion provided at the axial end of the insulated operating rod and having a movable grip portion and a fixed grip portion that are separated from each other by an operation of the grip portion provided on the insulated operating rod; an insulating auxiliary insulating operation rod for assisting the approaching and separating action of the holding part connected with the front end; and a grip operation part which is attached near the base end part of the insulating operation rod, is rotatably connected to the base end part of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in the longitudinal direction thereof by the lever action.

The fixed holding part comprises: a base end portion connected to a front end of the insulated operating rod; a central portion arranged at a base end portion and formed in a substantially arc shape protruding outward in a plane direction including an axial direction of the insulating operation rod; and front end parts arranged in a central part. The central portion of the fixed grip portion is a portion that abuts against the object to be gripped on the inner side in the plane direction, and has a first concave portion that is recessed outward and a first convex portion that protrudes inward so as to form a wave shape that continuously bends or curves in the plane direction from the base end portion side toward the front end portion side. The movable gripping part comprises: a base end part rotatably connected with the front end of the auxiliary insulation operating rod; a central portion arranged at the base end portion and formed in a substantially arc shape that is outwardly convex in a planar direction opposite to a convex direction of the central portion of the fixed grip portion; and a distal end portion arranged at the central portion, and a proximal end portion rotatably coupled to the proximal end portion of the fixed grip portion via a pivot so as to be movable toward and away from the fixed grip portion by an operation of the grip operation portion.

The center portion of the movable gripping portion is a portion that abuts against the gripping target on the inner side in the surface direction, and has a first concave portion that is recessed outward and a first convex portion that protrudes inward so as to form a wave shape that continuously bends or curves in the surface direction from the base end portion side toward the front end portion side.

The distal end portion of the movable grip portion and the distal end portion of the fixed grip portion are formed to be substantially parallel to each other when the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion come into contact with each other.

The grasping tool for indirect firing line engineering according to the present invention includes: an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body; a grip portion provided at the axial end of the insulated operating rod and having a movable grip portion and a fixed grip portion that are separated from each other by an operation of the grip portion provided on the insulated operating rod; an insulating auxiliary insulating operation rod for assisting the approaching and separating action of the holding part connected with the front end; and a grip operation part which is attached near the base end part of the insulating operation rod, is rotatably connected to the base end part of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in the longitudinal direction thereof by the lever action.

Further, since the distal end portion of the movable gripping portion and the distal end portion of the fixed gripping portion are formed to be substantially parallel to each other when the distal end portion of the movable gripping portion and the distal end portion of the fixed gripping portion are in contact with each other, the gripping portions can grip the objects to be gripped, which are relatively small in diameter, in a plate-like or sheet-like shape while facing each other.

Further, the fixed grip portion includes: a base end portion connected to a front end of the insulated operating rod; a central portion arranged at a base end portion and formed in a substantially arc shape protruding outward in a plane direction including an axial direction of the insulating operation rod; and a distal end portion arranged in a central portion, wherein the central portion of the fixed grip portion is a portion that abuts against the object to be gripped on the inner side in the plane direction, and has a first concave portion that is concave outward and a first convex portion that is convex inward so as to form a wave shape that is continuously bent or curved in the plane direction from the proximal end portion side toward the distal end portion side.

The movable gripping portion includes: a base end part rotatably connected with the front end of the auxiliary insulation operating rod; a central portion arranged at the base end portion and formed in a substantially arc shape that is outwardly convex in a planar direction opposite to a convex direction of the central portion of the fixed grip portion; and a distal end portion arranged in a row at a central portion, the proximal end portion being rotatably connected to the proximal end portion of the fixed grip portion via a pivot shaft so as to be movable toward and away from the fixed grip portion by an operation of the grip operation portion, the central portion of the movable grip portion being a portion that abuts against the object to be gripped on an inner side in the plane direction, and the distal end portion having a first concave portion that is concave outward and a first convex portion that protrudes inward so as to form a wave shape that continuously bends or curves in the plane direction from the proximal end portion side toward the distal end portion side, whereby the object to be gripped having a relatively large diameter can be gripped between the central portion of the fixed grip portion and the central portion of the movable grip portion.

Specifically, the object to be grasped having a large diameter to the extent that the object cannot be grasped by the distal end portion of the grasping portion can be inserted into the first concave portion provided in the central portion of the fixed grasping portion, and the object to be grasped inserted into the first concave portion can be prevented from coming off to the distal end side by the first convex portion provided in the central portion of the fixed grasping portion.

The gripping object placed in the first recess of the fixed gripping part is stably gripped so as to be sandwiched by the first recesses of the fixed gripping part by approaching the first recess of the central portion of the movable gripping part of the fixed gripping part by the operation of the gripping operation part. Further, the object to be gripped by the first concave portion of the fixed gripping portion and the first concave portion of the movable gripping portion can be prevented from being detached toward the distal end side by the first convex portion provided at the central portion of the movable gripping portion.

The grasping tool for indirect firing line engineering according to the present invention may be further configured as follows. That is, the center portion of the fixed grip portion further includes a second concave portion which is arranged on the tip end portion side of the first convex portion in the center portion of the fixed grip portion and is recessed outward so as to form a waveform that is bent or curved in the plane direction, and the center portion of the movable grip portion further includes a second concave portion which is arranged on the tip end portion side of the first convex portion in the center portion of the movable grip portion and is recessed outward so as to form a waveform that is bent or curved in the plane direction.

According to the gripping tool for indirect firing line work of the present invention, the gripping object having a relatively small diameter can be gripped between the second concave portion provided in the central portion of the fixed gripping portion and the second concave portion provided in the central portion of the movable gripping portion.

The grasping tool for indirect firing line engineering according to the present invention may be configured as follows.

That is, a grasping tool for indirect firing line engineering includes: an insulating operation rod having a length equal to or longer than a safety distance for maintaining safety between the electric wire and a human body; a grip portion provided at the axial end of the insulated operating rod and having a movable grip portion and a fixed grip portion that are separated from each other by an operation of the grip portion provided on the insulated operating rod; an insulating auxiliary insulating operation rod for assisting the approaching and separating action of the holding part connected with the front end; a grip operation part which is attached near the base end part of the insulating operation rod, is rotatably connected to the base end part of the auxiliary insulating operation rod, and operates the grip part by reciprocating the auxiliary insulating operation rod in the longitudinal direction thereof by the action of a lever, and the fixed grip part includes: a base end portion connected to a front end of the insulated operating rod; a central portion arranged at a base end portion and formed in a substantially arc shape protruding outward in a plane direction including an axial direction of the insulating operation rod; a tip portion arranged in a central portion, the movable grip portion including: a base end part rotatably connected with the front end of the auxiliary insulation operating rod; a central portion arranged at the base end portion and formed in a substantially arc shape that is outwardly convex in a planar direction opposite to a convex direction of the central portion of the fixed grip portion; and a distal end portion arranged at the central portion, wherein the proximal end portion is pivotally connected to the proximal end portion of the fixed grip portion via a pivot so as to be able to approach to and separate from the fixed grip portion by an operation of the grip operation portion, and wherein the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion are formed so as to be substantially parallel to each other when the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion come into contact with each other.

The front end portion of the fixed grip portion has inwardly projecting protrusions and outwardly recessed recesses so as to form a wave shape curved in the plane direction, the front end portion of the movable grip portion has outwardly recessed recesses and inwardly projecting protrusions so as to form a wave shape curved in the plane direction, the protrusions of the front end portion of the fixed grip portion and the recesses of the front end portion of the movable grip portion are engaged when the front end portion of the movable grip portion comes into contact with the front end portion of the fixed grip portion, and the recesses of the front end portion of the fixed grip portion and the protrusions of the front end portion of the movable grip portion are engaged when the front end portion of the movable grip portion comes into contact with the front end portion of the fixed grip portion.

According to the grip tool for indirect firing line engineering of the present invention, the distal end portion of the fixed grip portion has the convex portion protruding inward and the concave portion recessed outward so as to form the waveform curved in the plane direction, the distal end portion of the movable grip portion has the concave portion recessed outward and the convex portion protruding inward so as to form the waveform curved in the plane direction, the convex portion of the distal end portion of the fixed grip portion and the concave portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion, and the concave portion of the distal end portion of the fixed grip portion and the convex portion of the distal end portion of the movable grip portion are engaged when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion, and therefore, the distal end portion of the movable grip portion and the distal end portion of the fixed grip portion which are substantially parallel when the distal end portion of the movable grip portion comes into contact with the distal end portion of the fixed grip portion are formed so as to be able to, the convex and concave portions of the tip end portion of the fixed grip portion and the concave and convex portions of the tip end portion of the movable grip portion, which are engaged with each other, can insert the sheet-like object to be gripped into the respective convex and concave portions bent into the wave shape, and grip the object more firmly so as not to slip off and come off from the tip end portion of the grip portion.

Effects of the invention

Therefore, according to the gripping tool for an indirect firing line process of the present invention, a plurality of types of gripping objects can be gripped at the center portion and the distal end portion of the gripping portion.

Drawings

Fig. 1 is a front view of a holding tool for indirect firing line engineering according to the present invention.

Fig. 2 is a perspective view showing a grip portion of the grip tool for indirect firing line engineering according to the present invention in an open state.

Fig. 3 is an enlarged view of a portion a of fig. 1, and is a front view of a grip portion in an open state of the grip tool for indirect firing line engineering according to the present invention.

Fig. 4 is a front view showing a fixed grip portion of the grip tool for indirect firing line engineering according to the present invention.

Fig. 5 is a front view showing a movable gripping part of the gripping tool for indirect firing line engineering according to the present invention.

Fig. 6 is a front view showing a state in which a gripping object having a relatively large diameter is gripped at a central portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention.

Fig. 7 is a front view showing a state in which a gripping target object having a relatively medium diameter ratio is gripped at a central portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention.

Fig. 8 is a front view showing a state in which a sheet-like object to be gripped is gripped at a distal end portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention.

Fig. 9 is a view showing a modification of the grip tool for indirect firing line engineering according to the present invention, and is a front view showing a grip portion in an open state.

Detailed Description

Hereinafter, a grasping tool for an indirect firing line process according to an embodiment of the present invention will be described in detail with reference to the drawings.

The directions and the following definitions used in the description of the specification and the claims are defined below. The direction close to the axis among the directions perpendicular to or intersecting the axis of the insulating operation rod constituting the grip tool for indirect live wire engineering is set as the inward direction, and the direction far from the axis among the directions perpendicular to or intersecting the axis of the insulating operation rod is set as the outward direction. In the insulated operating rod, the end held by the operator's hand is the base end, and the end provided with the holding portion is the tip end. The positional relationship between the proximal end and the distal end is the same throughout the entire grasping part and the grasping tool for indirect firing line engineering. Further, a direction including a base end direction or a tip end direction passing through the axis of the insulating operating rod is defined as an axis direction a. The direction of approach and separation in a gripping unit having a movable gripping unit and a fixed gripping unit that approach and separate by the operation of the gripping operation unit is defined as the direction B. The plane V including the axial direction of the insulating rod is a plane defined by the axial direction of the insulating rod and the direction B intersecting the axial direction.

The embodiments described below are merely examples embodying the present invention, and do not limit the technical scope of the present invention.

As shown in fig. 1, a grasping tool 10 for indirect firing line engineering includes: the insulated operating rod 14, a grip portion 12 provided at the tip of the insulated operating rod 14, a grip operating portion 26 provided near the base end portion of the insulated operating rod 14, and an auxiliary insulated operating rod 24 for transmitting an operation by the grip operating portion 26 to the grip portion 12. The grip portion 12 includes a movable grip portion 20 and a fixed grip portion 22, and the grip operation portion 26 is used to operate the movement of approaching and separating the movable grip portion 20 and the fixed grip portion 22 constituting the grip portion 12 in the direction B. Each constituent element will be described in detail below.

The insulating operating rod 14 is a columnar rod-shaped member made of an insulating material.

Since the grasping tool 10 for indirect live wire engineering is used for cutting the down conductor of the high-voltage distribution line, the insulating operation rod 14 has a length equal to or longer than a safe distance for keeping safety between the electric wire and the human body.

The insulated operating rod 14 is provided with a rain shield 16 and a flange 18 to avoid creeping discharge and electric leakage.

As described above, the grip 12 is provided at the tip of the insulated operating rod 14, and the grip 26 is provided near the base end of the insulated operating rod 14.

The operator positions the grip 12 provided at the distal end at the working position by the insulated operating rod 14. Then, the operator performs the operation of approaching and separating the grip portion 12 by the grip operation portion 26.

The auxiliary insulating operation rod 24 is made of the same material as the insulating operation rod 14, and similarly, a rain shield 16 and a flange 18 are provided for preventing electric leakage and creeping discharge.

The distal end portion of the auxiliary insulating operation rod 24 is rotatably coupled to a proximal end portion 20a of a movable grip portion 20 described later.

The proximal end of the auxiliary insulating operation lever 24 is rotatably connected to an operation piece 26e of a grip operation portion 26 described later.

The auxiliary insulating operation rod 24 is provided in line with the insulating operation rod 14, and assists the approaching/separating operation by the grip operation part 26 of the grip part 12 attached to the tip of the insulating operation rod 14.

A tip member 25 is provided at the tip of the auxiliary insulating operation rod 24 to be rotatably coupled to the base end portion 20a of the movable grip portion 20.

As shown in fig. 2, 3, and the like, the tip member 25 is formed in a substantially cylindrical shape having a substantially cylindrical shape with a tip end 25b side bifurcated from the middle and a base end 25a side open, and is formed to extend in the axial direction of the auxiliary insulating operation rod 24.

The tip member 25 is formed such that the inner diameter of the opening on the base end 25a side coincides with the diameter of the auxiliary insulating operation rod 24, and the tip of the auxiliary insulating operation rod 24 can be fitted into the opening on the base end 25a side. The tip member 25 is formed in a shape in which the tip 25b side crosses the radial direction from the tip 25b toward the base end 25a, and is a cut having a concave shape in side view.

In the tip member 25, a rivet hole 25d is formed near the tip end 25b, and the rivet hole 25d is opened so as to be orthogonal to the concave cutout and to pass through the center line in the radial direction.

Further, in the tip member 25, a bolt hole 25c is formed in the vicinity of the base end 25a, and the bolt hole 25c is opened in parallel with the rivet hole 25d, that is, so as to pass through the center line in the radial direction.

The tip end member 25 is fitted with the tip end portion of the auxiliary insulating operation rod 24 from the base end 25a side, and is integrated with the auxiliary insulating operation rod 24 by inserting a bolt 25e penetrating the tip end portion of the auxiliary insulating operation rod 24 from a bolt hole 25 c.

Further, in the distal end member 25, the rivet hole 25d is aligned with a base end side rivet hole 20e, described later, of the base end portion 20a of the movable grasping portion 20 located on the distal end 25b side of the distal end member 25, and the movable grasping portion 20 and the auxiliary insulating operation rod 24 are connected by inserting the rivet 42 through the rivet hole 25d and the rivet hole 20 e.

In the grasping tool 10 for indirect heating wire engineering, the grasping portion 12 can approach the grasping object 84, grasp the grasping object 84 by pinching it at the tip end portion, and grasp the grasping object 84 by pinching or clasping it at the central portion.

The grip portion 12 includes a movable grip portion 20 and a fixed grip portion 22.

The movable grip portion 20 connected to the insulating operation rod 14 extends from the base end portion 22a connected to the insulating operation rod 14 toward the auxiliary insulating operation rod 24 and further extends upward on the side opposite to the insulating operation rod 14, while the fixed grip portion 22 connected to the auxiliary insulating operation rod 24 extends from the base end portion a of the movable grip portion connected to the auxiliary insulating operation rod 24 toward the insulating operation rod 14 and further extends upward where the insulating operation rod 14 extends. The movable grip portion 20 and the fixed grip portion 22 intersect each other about a pivot (pivot 30 described later) to form a U-shaped clamping structure.

The fixed grip portion 22 is a member constituting the grip portion 12. The fixed grip portion 22 is formed of a hard material such as a metal material. As shown in fig. 4, the fixed grip portion 22 includes: the insulating operation rod 14 includes an insertion portion 15 for inserting a distal end portion of the insulating operation rod 14, a base end portion 22a arranged on a distal end side of the insertion portion 15, a central portion 22b arranged on a distal end side of the base end portion 22a, and a distal end portion 22c arranged on a distal end side of the central portion 22 b.

As shown in fig. 4, the fixing grip portion 22 is formed in an overall shape that is inclined by substantially 45 degrees outward with respect to the axial direction a of the insulating operating rod 14, is substantially arc-shaped protruding outward on the surface V including the axial direction a of the insulating operating rod 14, and is tapered on the surface V including the axial direction a of the insulating operating rod 14 from the base end portion 22a to the tip end portion 22 c. In fig. 4, a plane V including the axial direction a of the insulating operating rod 14 coincides with the paper plane.

As shown in fig. 4, a plane V including the axial direction a of the insulating operation rod 14 is a plane substantially coincident with a longitudinal section extending from the distal end portion of the distal end portion 22c of the fixed grip portion 22 to the rear end portion of the proximal end portion 22a of the fixed grip portion, and is a plane orthogonal to the width direction of the fixed grip portion 22.

As shown in fig. 4, the fitting portion 15 is formed such that the distal end side is closed and integrally arranged at the base end portion 22a, and the base end 15a side is open in a substantially cylindrical shape. The fitting portion 15 is formed such that the inner diameter of the opening portion on the base end 15a side coincides with the diameter of the insulating operation rod 14, and the distal end portion of the insulating operation rod 14 can be fitted into the opening portion on the base end 15a side.

A bolt hole 15c that opens so as to pass through the center line in the radial direction (the inward-outward direction) is formed in the side surface of the fitting portion 15 that forms the cylindrical surface. As shown in fig. 3, the fitting portion 15 encloses the distal end portion of the insulating operation rod 14 from the base end 15a side, and a bolt 15e penetrating the distal end portion of the insulating operation rod 14 is inserted through the bolt hole 15c and connected to the insulating operation rod 14.

As shown in fig. 3 and 4, the proximal end 22a of the fixed grip portion 22 is arranged in the fitting portion 15. As shown in fig. 4, the base end portion 22a is formed to be inclined at substantially 45 degrees outward with respect to the axial direction a of the insulating operating rod 14, and is formed with a bent portion 22av which is further bent outward from a midway of the base end portion 22a and extends at substantially 90 degrees with respect to the axial direction a of the insulating operating rod 14.

As shown in fig. 4, a bolt hole 22d for passing a bolt 30 for rotatably coupling the movable grip portion 20 is formed in the base end portion 22a, and the bolt hole 22d is opened in the vicinity of the bent portion 22av in a direction orthogonal to a plane V including the axial direction a of the insulating operating rod 14.

As shown in fig. 4, the central portion 22b is formed to be arranged at the base end portion 22a, and has a substantially circular arc shape as a whole that protrudes outward on a plane V including the axial direction a of the insulated operating rod 14.

On the outer side surface, the central portion 22b is smoothly continuous with a base end portion 22a inclined by substantially 90 degrees with respect to the axial direction a of the insulating operation rod 14, and is curved gradually changing the curvature inward.

Further, the central portion 22b is formed of four flat surfaces on the inner side surface, and a central portion first contact surface 221b, a central portion second contact surface 222b, a central portion third contact surface 223b, and a central portion fourth contact surface 224b, which are contact surfaces with the gripping target 84, are formed.

For example, the central portion first abutment surface 221b is a surface that is continuous from the inner side surface of the base end portion 22a and is inclined outward with respect to the axial direction a of the insulating operation rod 14.

The center portion second contact surface 222b is a flat surface that is curved inward and continuous from the distal end side edge of the center portion first contact surface 221 b. The center portion third abutment surface 223b is a surface that is curved and continuous outward from the distal end side edge of the center portion second abutment surface 222 b.

The center portion fourth abutment surface 224b is a surface that is curved and continuous inward from the distal end side edge of the center portion third abutment surface 223 b.

The center portion first contact surface 221b, the center portion second contact surface 222b, the center portion third contact surface 223b, and the center portion fourth contact surface 224b are formed so as to be orthogonal to a surface V including the axial direction a of the insulating operating rod 14.

As shown in fig. 2, 3, and 4, the central portion 22b of the fixed grip 22 is a portion that abuts against the object 84 to be gripped on the inner side in the plane V direction including the axial direction a, and includes a first concave portion 22b1s that is concave outward, a first convex portion 22b1t that protrudes inward, and a second concave portion 22b2s that is concave outward so as to form a wave shape that is bent or curved in the plane V direction including the axial direction a continuously from the base end portion 22a side toward the tip end portion 22c side.

The first concave portion 22b1s and the recessed second concave portion 22b2s of the fixed grip portion 22 sandwich and enclose the gripping object 84 between the first concave portion 20b1s and the second concave portion 20b2s of the central portion 20b of the movable grip portion 20, which will be described later.

Specifically, the first recessed portion 22b1s is a portion formed by the inner surface of the central portion 22b being recessed outward at a position on the proximal end side or in the vicinity of the middle of the central portion 22b of the fixed grip portion 22 in the axial direction a. For example, as shown in fig. 4, the first concave portion 22b1s is a concave portion bent in an L shape, and the bending angle thereof is approximately 134 degrees. The inner side surface of the central portion 22b changes the outward inclination to the inward inclination or even the inclination to the axial direction a by the first concave portion 22b1 s. That is, the first recessed portion 22b1s is a connecting portion between the center portion first contact surface 221b and the center portion second contact surface 222 b.

The first convex portion 22b1t is a portion formed by protruding inward from the first concave portion 22b1s to the inside in the axial direction a and toward the inner side surface of the central portion 22b continuing to the tip end side. For example, as shown in fig. 4, the first convex portion 22b1t is a convex portion bent in an L shape, and the bending angle thereof is approximately 114 degrees. The inner surface of the central portion 22b is inclined inward or outward again in the axial direction a by the first convex portion 22b1 t.

That is, the first convex portion 22b1t is a connecting portion between the center portion second contact surface 222b and the center portion third contact surface 223 b.

The second recessed portion 22b2s is a portion formed by the inner surface of the central portion 22b being recessed outward at a position on the tip side in the axial direction a of the central portion 22b of the fixed grip portion 22. For example, as shown in fig. 4, the second concave portion 22b2s is a concave portion bent in an L shape, and the bending angle thereof is approximately 137 degrees.

By the second concave portion 22b2s, the inner side surface of the central portion 22b changes the outward inclination to a gentle outward inclination whose inclination angle is reduced. That is, the second recessed portion 22b2s is a connecting portion between the center portion third contact surface 223b and the center portion fourth contact surface 224 b.

The first concave portion 22b1s, the first convex portion 22b1t, and the second concave portion 22b2s are described in relation to a virtual plane C1 extending from the bolt hole 22d formed in the base end portion 22a toward the tip end portion 22C.

As shown in fig. 4, the first concave portion 22b1s is located outward with respect to the imaginary plane C1. On the other hand, the first convex portion 22b1t is located inward with respect to the imaginary plane C1. The second recessed portion 22b2s is located outward of the imaginary plane C1.

The distal end portion 22c of the fixed grip portion 22 is a portion for abutting against the object 84 inside thereof, and gripping the object 84 by sandwiching it between the distal end portion 20c of the movable grip portion 20 facing thereto.

As shown in fig. 3 and 4, the distal end portion 22c and the central portion 22b are arranged in line. The outer side surface of the distal end portion 22c is formed so that the proximal end side and the outer side surface of the central portion 22b are smoothly and continuously arranged until the distal end side is slightly bent outward, and extends in a direction inclined outward by substantially 45 degrees with respect to the axial direction a of the insulating operating rod 14.

As shown in fig. 3 and 4, the distal end portion 22c has a plurality of grooves on the inner side of the distal end side thereof, and has a distal end portion contact surface 220c as a surface that contacts the object to be gripped 84. The distal end abutment surface 220C is a surface formed on the distal end 22C along the imaginary plane C1. The overall shape of the distal end portion 22C is substantially parallel to the imaginary plane C1.

As shown in fig. 3 and 4, the distal end portion 22c has, on the inside of the proximal end side thereof, a convex portion 22ct protruding inward and a concave portion 22cs recessed outward so as to form a wave shape curved in the plane V direction including the axial direction a.

The convex portions 22ct are arranged on the inner side surface of the central portion 22b, and protrude inward from the inner side surface of the central portion 22 b.

The concave portion 22cs is arranged on the tip side of the convex portion 22ct, and is a portion recessed outward from the tip end abutment surface 220 c.

The convex portion 22ct of the distal end portion 22c of the fixed grip portion 22 and the concave portion 20cs of the distal end portion 20c of the movable grip portion 20, which will be described later, are engaged when the distal end portion 20c of the movable grip portion 20 comes into contact with the distal end portion 22c of the fixed grip portion 22. At the same time, the concave portion 22cs of the distal end portion 22c of the fixed grip portion 22 and the convex portion 20ct of the distal end portion 20c of the movable grip portion 20 are engaged when the distal end portion 20c of the movable grip portion 20 comes into contact with the distal end portion 22c of the fixed grip portion 22.

Specifically, the convex portion 22ct of the distal end portion 22c of the fixed grip portion 22 is formed of three surfaces extending in the width direction of the fixed grip portion 22, and is formed of a convex portion inclined surface 22ct1, a convex portion top surface 22ct2, and a convex portion vertical surface 22ct 3.

The convex portion vertical surface 22ct3 is a surface extending inward from the front end side edge of the inner side surface of the central portion 22b so as to be orthogonal to the virtual plane C1, and is a plane orthogonal to the plane V including the axial direction a.

The projection top surface 22ct2 is a surface extending parallel to the virtual plane C1 from the inner end edge of the projection vertical surface 22ct3, and is a surface orthogonal to the plane V including the axial direction a. The convex portion top surface 22ct2 is a surface constituting the top surface of the convex portion 22 ct. The projection top surface 22ct2 is located inward of the imaginary plane C1.

The convex portion inclined surface 22ct1 is a surface extending outward from the distal end side edge of the convex portion top surface 22ct2 toward the distal end, and is a surface orthogonal to the surface V including the axial direction a. The projection inclined surface 22ct1 is a surface that gradually protrudes inward when the projection 22ct is viewed from the front end side.

Thus, when the sheet-like object to be gripped 84 is inserted from the distal end side of the grip portion 12 and the grip portion 12 is intended to grip the sheet-like object to be gripped 84, it is possible to prevent the edge of the sheet-like object to be gripped 84 from being caught on the convex portion 22ct and being unable to be inserted into the central portion of the grip portion 12.

The front end side edge of the convex inclined surface 22ct1 is located outside the virtual plane C1.

The concave portion 22cs of the distal end portion 22c of the fixed grip portion 22 is formed of two surfaces extending in the width direction of the fixed grip portion 22, and is formed of a concave portion inclined surface 22cs1 and a concave portion bottom surface 22cs 2.

The recess bottom surface 22cs2 is a surface extending from the distal end edge of the projection inclined surface 22ct1 to the distal end along the virtual plane C1, and is a surface orthogonal to the plane V including the axial direction a. The recess bottom surface 22cs2 is located outside the imaginary plane C1. The recess inclined surface 22cs1 is a surface extending inward from the distal end side edge of the recess bottom surface 22cs2 and toward the distal end, and is a surface orthogonal to the surface V including the axial direction a. The front end side edge of the recess inclined surface 22cs1 is located on the virtual plane C1.

The front end side edge of the concave portion inclined surface 22cs1 is connected to the front end abutment surface 220 c.

As shown in fig. 2, the fixing and holding portion 22 has an elongated hole 22 g. The elongated hole 22g is a hole extending along a plane V including the axial direction a of the insulating operation rod 14, which is a direction orthogonal to the extending direction of the bolt 30, and is continuous from the base end portion 22a to the tip end side of the central portion 22b, and is formed to penetrate the inner side surface and the outer side surface.

As shown in fig. 2, the elongated hole 22g is a hole for movably inserting a base end portion 20a of the movable grip portion 20, which will be described later, into the fixed grip portion 22.

The movable grip portion 20 is a member constituting the grip portion 12, and is disposed so as to approach and separate from the fixed grip portion 20 in the direction B shown in fig. 1 by operation of a grip operation portion 26 provided on the insulating operation rod 14. The movable grip portion 20 is formed of a hard material such as a metal material.

As shown in fig. 5, the movable grasping portion 20 has a base end portion 20a, a central portion 20b arranged on the tip end side of the base end portion 20a, and a tip end portion 20c arranged on the tip end side of the central portion 20 b.

The overall shape of the movable grip portion 20 is formed in a substantially arc shape that is outwardly convex in a direction opposite to the convex direction of the overall shape of the fixed grip portion 22 on a surface V including the axial direction a of the insulated operating rod 14, and is tapered from the base end portion 20a to the tip end portion 20c on the surface V including the axial direction a of the insulated operating rod 14.

In fig. 5, a plane V including the axial direction a of the insulating operating rod 14 coincides with the paper plane.

As shown in fig. 5, the plane V including the axial direction a of the insulating operating rod 14 is a plane substantially coincident with a vertical cross section extending from the distal end portion of the distal end portion 20C of the movable grip portion 20 to the rear end portion of the proximal end portion 20a of the movable grip portion, and is a plane orthogonal to the width direction of the movable grip portion 20.

As shown in fig. 1, 2, and 3, the proximal end 20a of the movable grip 20 is connected to the distal end of the auxiliary insulating operation rod 24. Specifically, although not shown, the base end 20f of the base end portion 20a is sandwiched in a concave cutout formed in the tip end 25b of the tip member 25 of the auxiliary insulating operation rod 24. The base end portion 20a is coupled to the auxiliary insulating operation rod 24 by a rivet 42, and the rivet 42 is inserted through a base end side rivet hole 20e opened in the vicinity of the base end 20f of the movable grip portion 20 in the direction orthogonal to the axial direction a of the insulating operation rod 14 and a rivet hole 25d opened in the distal end member 25 of the auxiliary insulating operation rod 24. That is, the base end portion 20a is rotatably connected to the tip end of the auxiliary insulating operation rod 24.

The proximal end portion 20a is formed to be thin in the vicinity of the proximal end portion 20f in the width direction perpendicular to the plane V including the axial direction a, that is, in the direction in which the rivet 42 is inserted.

As shown in fig. 5, the base end portion 20a is formed to be curved in a C-shape from the base end 20f toward the tip end in the axial direction a on a surface V including the axial direction a of the insulating operating rod 14. As shown in fig. 5, a bolt hole 20d is opened in the vicinity of the center of the base end portion 20a in a direction perpendicular to the axial direction a of the insulating operating rod 14, and the bolt hole 20d is formed to pass through a bolt 30 for rotatably coupling the movable grip portion 22 to the fixed grip portion 22.

As shown in fig. 5, the central portion 20b is connected to the base end portion 20a, and is formed in a substantially arc shape that is convex outward in a direction opposite to the convex direction of the central portion 22b of the fixed grip portion 22 on a plane V including the axial direction a of the insulated operating rod 14.

The central portion 20b is connected to the base end portion 20a at the outer side surface as a smooth arc, and further bent in a C-shape while changing its direction inward from the tip direction in the axial direction a of the insulating operation rod 14.

Further, the center portion 20b has a center portion first contact surface 201b and a center portion second contact surface 202b2 formed on the inner surface thereof, which are contact surfaces for contacting the gripping object 84.

The central portion 20b is formed to have a thickness greater than that of the proximal portion 20a, and to have the same thickness as that of the central portion 22a of the fixed grip portion 22, and the proximal portion 20a is formed to be thin in the width direction, which is a direction perpendicular to the plane V including the axial direction a.

For example, the central portion first abutment surface 201b is a surface which is continuous from the inner side surface of the proximal portion 20a and is curved inward with a curvature larger than that of the outer side surface of the central portion.

The center portion second contact surface 202b is arranged on the center portion first contact surface 201b, but is arranged to be bent or curved outward to the axial direction a to some extent with respect to the tip end side edge of the center portion first contact surface 201 b.

The center portion second abutment surface 202b is a surface that is curved inward with a curvature smaller than that of the center portion first abutment surface 201 b. The center portion first contact surface 201b and the center portion second contact surface 202b are formed so as to be orthogonal to a surface V including the axial direction a of the insulating operating rod 14.

As shown in fig. 2, 3, and 5, the central portion 20b of the movable gripper 20 is a portion that abuts against the object 84 to be gripped on the inner side in the plane V direction including the axial direction a, and has a first concave portion 20b1s that is concave outward, a first convex portion 20b1t that is convex inward, and a second concave portion 20b2s that is concave outward so as to form a wave shape that is continuously bent or curved in the plane V direction including the axial direction a from the base end portion 22a side toward the tip end portion 22c side.

The first concave portion 20b1s and the second concave portion 20b2s of the central portion 20b of the movable grasping portion 20 are portions for grasping the grasping object 84 so as to be sandwiched between the first concave portion 22b1s and the second concave portion 22b2s of the opposing fixed grasping portion 22.

Specifically, the first recessed portion 20b1s is a portion formed by the inner surface of the central portion 20b being recessed outward at a position on the proximal end side or in the vicinity of the middle of the central portion 20b of the movable grip portion 20 in the axial direction a. For example, as shown in fig. 5, the first concave portion 20b1s is a concave portion curved in a U shape, and has a radius of curvature of approximately 46mm, and an angle of an arc formed by the radius of curvature is approximately 136 degrees.

The inner side surface of the central portion 20b changes the inclination outward to the inclination inward or even to the axial direction a by the first concave portion 20b1 s. That is, the first recessed portion 20b1s is a recessed portion formed by the central portion first contact surface 201 b.

The first convex portion 20b1t is continuous from the first concave portion 20b1s inward in the axial direction a toward the tip end side, and is a portion formed by the inner side surface of the central portion 20b protruding inward. For example, as shown in fig. 5, the first convex portion 20b1t is a convex portion bent in a U shape.

The inner surface of the central portion 20b is inclined inward or outward in the axial direction a again by the first convex portion 20b1 t. That is, the first projecting portion 20b1t is a connecting portion between the center portion first contact surface 201b and the center portion second contact surface 202 b.

The second recessed portion 20b2s is a portion formed by the inner surface of the central portion 20b being recessed outward at a position on the tip side in the axial direction a of the central portion 20b of the movable grip portion 20. For example, as shown in fig. 5, the second concave portion 20b2s is a concave portion curved in a U shape, and has a radius of curvature of approximately 50mm, and an angle of a circular arc formed by the radius of curvature is approximately 38 degrees.

The inner side surface of the central portion 20b changes the outward inclination to the inward inclination or even the inclination to the axial direction a by the second concave portion 20b2 s. That is, the second recessed portion 20b2s is a recessed portion formed by the central portion second abutment surface 202 b.

The first concave portion 20b1s, the first convex portion 20b1t, and the second concave portion 20b2s are described in relation to a virtual plane C2 extending from the bolt hole 20d formed in the base end portion 20a toward the tip end portion 20C.

As shown in fig. 5, the first concave portion 20b1s, the first convex portion 20b1t, and the second concave portion 20b2s are located outside of the imaginary plane C2.

The distal end portion 20c of the movable gripping portion 20 abuts on the object 84 inside thereof, and grips the object 84 while sandwiching it between the distal end portion 22c of the opposing fixed gripping portion 22. As shown in fig. 5, the distal end portions 20c are arranged in the central portion 20 b. The outer surface of the distal end portion 20c is formed such that the proximal end side and the outer surface of the central portion 20b are smoothly and continuously arranged and are curved outward to some extent up to the distal end side.

As shown in fig. 3 and 5, the distal end portion 20c has a plurality of grooves on the inner side of the distal end side thereof, and has a distal end portion contact surface 200c that is a surface that contacts the object to be gripped 84. The distal end abutment surface 200C is a surface formed on the distal end 20C along the imaginary plane C2. The overall shape of the distal end portion 20C is substantially parallel to the imaginary plane C2.

Further, as shown in fig. 3 and 5, in the tip end portion 20c, on the inside of the base end side thereof, there are a concave portion 20cs that is concave outward and a convex portion 20ct that is convex inward in such a manner as to form a wave shape that is curved in the plane V direction including the axial direction a.

The concave portion 20cs is arranged on the inner side surface of the central portion 20b, for example, the central portion second abutment surface 202b, and is a portion recessed outward from the inner side surface of the central portion 20b and the distal end abutment surface 200 c.

The convex portion 20ct is arranged on the front end side of the concave portion 20cs and is a portion protruding inward from the front end abutment surface 200 c.

The concave portion 20cs of the distal end portion 20c of the movable grip portion 20 and the convex portion 22ct of the distal end portion 22c of the fixed grip portion 22 are engaged when the distal end portion 20c of the movable grip portion 20 comes into contact with the distal end portion 22c of the fixed grip portion 22. At the same time, the convex portion 20ct of the distal end portion 20c of the movable grip portion 20 and the concave portion 22cs of the distal end portion 22c of the fixed grip portion 22 are engaged when the distal end portion 20c of the movable grip portion 20 and the distal end portion 22c of the fixed grip portion 22 come into contact.

Specifically, the recess 20cs of the distal end portion 20c of the movable grip 20 is formed of two surfaces extending in the width direction of the movable grip 20, and is formed of a recess inclined surface 20cs2 and a recess bottom surface 20cs 1.

The recess inclined surface 20cs2 is a surface extending outward from the inner surface of the central portion 20b, for example, the distal end side end edge of the central portion second abutment surface 202b, toward the distal end, and is a surface orthogonal to the plane V including the axial direction a.

The recess bottom surface 20cs1 is a surface extending from the outer end edge of the recess inclined surface 20cs2 in parallel with the virtual plane C2, and is a surface orthogonal to the plane V including the axial direction a.

The recess bottom surface 20cs1 is located outside the imaginary plane C2.

The convex portion 20ct at the distal end portion 20c of the movable grip 20 is formed of three surfaces extending in the width direction of the movable grip 20, and is formed of a convex portion vertical surface 20ct3, a convex portion top surface 20ct2, and a convex portion inclined surface 20ct 1.

The convex portion vertical surface 20ct3 is a surface extending inward from the distal end side edge of the concave portion bottom surface 20cs1 so as to be orthogonal to the virtual plane C2, and is a plane orthogonal to the plane V including the axial direction a. The projection top surface 20ct2 is a surface extending parallel to the virtual plane C2 from the inner end edge of the projection vertical surface 20ct3, and is a surface orthogonal to the plane V including the axial direction a. The convex portion top surface 20ct2 is a surface constituting the top surface of the convex portion 20 ct. The projection top surface 20ct2 is located inward of the imaginary plane C2.

The projection inclined surface 20ct1 is a surface extending outward from the distal end side edge of the projection top surface 20ct2 toward the distal end, and is a surface orthogonal to the surface V including the axial direction a. The projection inclined surface 20ct1 is a surface that gradually protrudes inward when the projection 20ct is viewed from the front end side.

Thus, when the sheet-like object to be gripped 84 is inserted from the distal end side of the grip portion 12 and the grip portion 12 is intended to grip the sheet-like object to be gripped 84, it is possible to prevent the edge of the sheet-like object to be gripped 84 from being caught by the convex portion 20ct and being unable to be inserted into the central portion of the grip portion 12.

The front end side edge of the convex inclined surface 20ct1 is located on the virtual plane C2. The tip end side edge of the convex inclined surface 20ct1 is connected to the tip end abutment surface 200 c.

As shown in fig. 2, the movable grip portion 20 is formed with an elongated hole 20g extending along a plane V including a direction orthogonal to the extending direction of the bolt 30, that is, the axial direction a of the insulating operation lever 14. The elongated hole 20g is a hole that is continuous from the base end side to the tip end side of the central portion 20b and that opens through the inner side surface and the outer side surface.

The elongated hole 20g is a hole for reducing the weight of the movable gripping portion 20 or the indirect firing line engineering gripping tool 10.

A long hole 22g is formed in the central portion 22b of the fixed grip portion 22, and a long hole 20g is formed in the central portion 20b of the movable grip portion 20. However, since the central portion 22b of the fixed grip portion 22 and the central portion 20b of the movable grip portion 20 are formed with the same thickness in the width direction, that is, in the direction orthogonal to the plane V including the axis direction a, the central portion first contact surface 221b, the central portion second contact surface 222b, the central portion third contact surface 223b, and the central portion fourth contact surface 224b, which are the inner side surfaces of the central portion 22b of the fixed grip portion 22, face the central portion first contact surface 201b and the central portion second contact surface 202b, which are the inner side surfaces of the central portion 20b of the movable grip portion 20, respectively, and have an area for gripping only the gripping object 84.

As shown in fig. 2, in the grip portion 12, the movable grip portion 20 is inserted into the elongated hole 22g of the fixed grip portion 22 from the base end 20f of the movable grip portion 20 from the inside toward the outside, and the bolt hole 20d of the movable grip portion 20 and the bolt hole 22d of the fixed grip portion 22 are arranged on the fixed grip portion 22 so as to overlap on the plane V including the axial direction a of the insulating operating rod 14.

The movable grip portion 20 is coupled to the fixed grip portion 22 so as to be rotatable in the direction B of fig. 1 relative to the fixed grip portion 22 and so as to be able to approach and separate from each other, using a bolt 30 and a nut (not shown) inserted through the bolt hole 20d and the bolt hole 22d that overlap each other.

At this time, the bolt 30 functions as a pivot when the movable grip portion 20 rotates with respect to the fixed grip portion 22. That is, the movable grip portion 20 can be moved in the direction B to be movable toward and away from the fixed grip portion 22 by the operation of the grip operation portion 26, and the proximal end portion 20a is connected to the proximal end portion 22a of the fixed grip portion 22 via the bolt 30 as a pivot.

As shown in fig. 1, the grip operation portion 26 is provided near the base end portion of the insulated operation lever 14, and includes an operation lever 26a, a support bracket 26b, a release lever 26c, an operation pivot shaft 26d, and an operation piece 26 e.

The support bracket 26b is pivotally supported by the operating lever 26a via an operating pivot shaft 26 d.

An operating piece 26e projecting toward the same side as the operating lever 26a is rotatably coupled to the base end portion of the auxiliary insulating operating lever 24.

Therefore, when the worker performs the operation of grasping the operating rod 26a, the auxiliary insulating operating rod 24 is pulled downward by the lever action, and the movable grip portion 20 is operated so as to be closed toward the fixed grip portion 22 around the bolt 30.

A spring 28 that biases the operating lever 26a in the opening direction is attached between the support bracket 26b and the operating lever 26a, and when the operator does not operate the operating lever 26a, the operating lever 26a is in the open state, and accordingly, the movable grip portion 20 is also held in the open state separated from the fixed grip portion 22.

The support metal fitting 26b has a lock mechanism, which is a well-known mechanism, and therefore, will be described below in brief.

The lock mechanism includes a bearing-shaped one-way clutch (not shown) using a roller (not shown) attached to a fulcrum position of the lever of the operating lever 26a, an operating rotating shaft 26d for axially supporting the one-way clutch, and a plurality of locking mechanisms (not shown) for fixing and/or releasing the rotation of the operating rotating shaft 26d at an arbitrary position.

Although not shown in the drawings, the locking mechanism includes a locking gear fixed to the operation rotating shaft 26 d; a locking pin for locking the locking gear; a locking spring for applying force to the locking pin in the direction of the locking gear; a release lever 26c for releasing the locking of the locking pin by pushing up the pin of the locking pin; a lever support shaft rotatably supporting the release lever 26 c; a locking release handle for holding or releasing the release lever 26c at a locking release position; a handle supporting shaft for rotatably supporting the locking releasing handle.

When the locking mechanism is set at the release position and the lock mechanism is released, the operation rotating shaft 26d is freely rotatable, the operation of the operating lever 26a is not related to the action of the one-way clutch, the operating lever 26a is freely rotatable, the opening and closing operation of the operating lever 26a is transmitted to the auxiliary insulating operating lever 24, and the movable grip portion 20 is opened and closed in accordance with the opening and closing operation of the operating lever 26 a.

On the other hand, when the locking mechanism is set to the locking position and the lock mechanism is operated, the operation rotating shaft 26d is locked, and the operation lever 26a is rotated in the closing direction by the operation of the one-way clutch, that is, only so as to pull the auxiliary insulating operation lever 24 downward, and the operation lever 26a is steplessly locked at an arbitrary position.

Therefore, when the operator operates the closing operation lever 26a in the direction to close the operating lever 26a, the operating lever 26a is stopped at the position where the operator operates the closing direction, and the movable grip portion 20 is locked at the position corresponding to the closed position of the operating lever 26a via the auxiliary insulating operation lever 24.

At this time, regardless of the size of the object 84, the operator can directly lock the operation lever 26a in this state by separating the hand from the operation lever 26a at a timing when the operator determines that the object 84 can be gripped with a force suitable for the work.

As shown in fig. 8, the distal end portion 20c of the movable grip portion 20 is rotated in the direction B of fig. 1 about the bolt 30 by the operation of the grip operation portion 26, and comes into contact with the distal end portion 22c of the fixed grip portion 22.

The distal end contact surface 200C of the distal end 20C of the movable grip 20 is located on the virtual plane C2 and is parallel to the virtual plane C2.

The distal end contact surface 220C of the distal end 22C of the fixed grip 22 is located on the virtual plane C1 and is parallel to the virtual plane C1.

When the distal end portion 20C of the movable grip portion 20 comes into contact with the distal end portion 22C of the fixed grip portion 22, the virtual plane C1 overlaps the virtual plane C2. The distal end abutment surface 220C and the distal end abutment surface 200C are parallel to the virtual plane C1 and the virtual plane C2, which overlap each other. That is, the distal end portion 20c of the movable grip portion 20 and the distal end portion 22c of the fixed grip portion 22 are formed to be substantially parallel when the distal end portion 20c of the movable grip portion 20 and the distal end portion 22c of the fixed grip portion 22 come into contact with each other.

The virtual plane C1 is a plane extending in the width direction of the fixed grip portion 22.

The virtual plane C2 is a plane extending in the width direction of the movable grip portion 20.

(use status and Effect)

Next, the use state and the operation and effect of the gripping tool 10 for the indirect firing line process gripping the gripping object 84 will be described with reference to fig. 6 to 8. Fig. 6 is a front view showing a state in which a gripping object having a relatively large diameter is gripped at a central portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention. Fig. 7 is a front view showing a state in which a gripping target object having a relatively medium diameter is gripped at a central portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention. Fig. 8 is a front view showing a state where a sheet-like object to be gripped is gripped by a distal end portion of a gripping portion of the gripping tool for indirect firing line engineering according to the present invention.

As shown in fig. 6, when the grasping tool 10 for indirect firing line engineering grasps a relatively large grasping object 84, for example, a relatively large electric wire 84, the movable grasping portion 20 is disposed so as to be distant from the fixed grasping portion 22. At this time, the central portion 20b of the movable grip portion 20 and the central portion 22b of the fixed grip portion 22 form a substantially closed region T1 therebetween, and the gripping object 84 is enclosed in the substantially closed region T1, whereby the gripping object 84 can be gripped.

Specifically, the concave curved surface formed by the center portion first contact surface 201b of the center portion 20b of the movable grip portion 20 and the center portion first contact surface 221b and the center portion second contact surface 222b of the center portion 22b of the fixed grip portion 22 are located opposite to each other.

Then, the center portion first contact surface 201b, the center portion first contact surface 221b, and the center portion second contact surface 222b are in contact with each other on the side surface of the relatively large diameter object to be gripped 84 in a cross-sectional view, and the relatively large diameter object to be gripped 84 is stably gripped.

At this time, the center portion first contact surface 201b, the center portion first contact surface 221b, and the center portion second contact surface 222b form a substantially closed region T1 inside the grip portion 12, and the gripping object 84 is enclosed in the substantially closed region T1.

In other words, the above-described operation makes it possible to insert the gripping object 84 having a large diameter to the extent that the gripping object cannot be gripped by the distal end portion of the gripping portion 12 into the first concave portion 22b1s provided in the central portion 22b of the fixed gripping portion 22, and prevents the gripping object 84 inserted into the first concave portion 22b1s from being detached toward the distal end side by the first convex portion 22b1t provided in the central portion 22b of the fixed gripping portion 22.

Then, the object 84 to be gripped placed in the first concave portion 22b1s of the fixed grip portion 22 is stably gripped so as to be pinched between the first concave portions 22b1s of the fixed grip portion 22 by the first concave portions 20b1s provided in the central portion 20b of the movable grip portion 20 that approaches the fixed grip portion 22 by the operation of the grip operation portion 26.

Further, the object 84 gripped by the first concave portion 22b1s of the fixed grip portion 22 and the first concave portion 20b1s of the movable grip portion 20 can be prevented from coming off to the distal end side by the first convex portion 20b1t included in the central portion 20b of the movable grip portion 20.

As shown in fig. 7, when the gripping tool 10 for indirect firing line engineering grips an object to be gripped 84 having a relatively medium diameter, for example, an electric wire 84 having a medium diameter, the movable gripping part 20 is disposed so as to be constantly separated from the fixed gripping part 22.

At this time, the central portion 20b of the movable grip portion 20 and the central portion 22b of the fixed grip portion 22 form a substantially closed region T2 therebetween, and the gripping object 84 is enclosed in the substantially closed region T2, whereby the gripping object 84 can be gripped.

Specifically, the concave curved surface formed by the center portion second abutment surface 202b of the center portion 20b of the movable grip portion 20 is positioned to face the center portion third abutment surface 223b and the center portion fourth abutment surface 224b of the center portion 22b of the fixed grip portion 22.

Then, the central portion second contact surface 202b, the central portion third contact surface 223b, and the central portion fourth contact surface 224b are in contact with each other in the side surface of the comparative intermediate diameter gripping object 84 in cross section, and the comparative intermediate diameter gripping object 84 is stably gripped. At this time, the center second contact surface 202b, the center third contact surface 223b, and the center fourth contact surface 224b form a substantially closed region T2 inside the grip 12, and the gripping object 84 is enclosed in the substantially closed region T2.

In other words, the above-described operation makes it possible to insert the gripping object 84 having a relatively small diameter into the second concave portion 22b2s provided in the central portion 22b of the fixed grip 22, and also makes it possible to prevent the gripping object 84 inserted into the second concave portion 22b2s from being detached toward the distal end side by the convex portion 22ct provided in the distal end portion 22c of the fixed grip 22.

Then, the gripping object 84 placed in the second concave portion 22b2s of the fixed gripping part 22 is stably gripped so as to sandwich the second concave portion 22b2s of the fixed gripping part 22 by the second concave portion 20b2s provided in the central portion 20b of the movable gripping part 20 that approaches the fixed gripping part 22 by the operation of the gripping operation part 26.

When the grasping tool 10 for indirect heating wire working grasps a plate-like or sheet-like grasping object 84 having a small diameter, for example, a sheet and/or a cover 84 shown in fig. 8, the movable grasping portion 20 is disposed in proximity to or in contact with the fixed grasping portion 22. At this time, the distal end portion 20c of the movable grip portion 20 can grip the object 84 by being sandwiched between the distal end portion 22b of the fixed grip portion 22.

Specifically, when the grasping tool 10 for indirect firing line engineering grasps the piece and/or the cover 84, the distal end portion abutment surface 200c of the distal end portion 20c of the movable grasping portion 20 and the distal end portion abutment surface 220c of the distal end portion 22c of the fixed grasping portion 22 are positioned so as to be adjacent to each other and so as to face each other in parallel.

The distal end abutment surface 200c and the distal end abutment surface 220c abut on both surfaces of the sheet and/or the cover 84, and the sheet and/or the cover 84 is sandwiched by the distal end portions of the grip portions 12.

Further, the piece and/or the cap 84 is inserted into the convex portion 20ct of the tip end portion 20c of the movable grip portion 20 and the concave portion 22cs of the tip end portion 22c of the fixed grip portion 22 which are engaged with each other, the concave portion 20cs of the tip end portion 20c of the movable grip portion 20 and the convex portion 22ct of the tip end portion 22c of the fixed grip portion 22 which are engaged with each other.

Further, since the concave portions 20cs and the convex portions 20ct of the distal end portion 20c of the movable grip portion 20 and the convex portions 22ct and the concave portions 22cs of the distal end portion 22c of the fixed grip portion 22 are formed in a wave shape curved in the plane direction, the entering piece and/or the cap 84 is curved along the wave shape.

Therefore, the tip end portion 20c of the movable grip portion 20 and the tip end portion 22c of the fixed grip portion 22 can grip the sheet and/or the cover 84 from both sides of the sheet and/or the cover 84, and the sheet and/or the cover 84 can be gripped more firmly in such a manner that the projection 22ct and the recess 22cs of the tip end portion 22c of the fixed grip portion 22 and the recess 20cs and the projection 20ct of the tip end portion 20c of the movable grip portion 20 which are engaged with each other enter the sheet and/or the cover 84 into the respective projections and recesses bent into the waveform shape without slipping off and disengaging from the tip end portion of the grip portion 12.

Although not shown, the grasping tool 10 for indirect firing line engineering can grasp the small-diameter or plate-like grasping object 84 between the distal end abutment surface 220c of the distal end portion 22c of the fixed grasping portion 22, which is the distal end portion of the grasping portion 12, and the distal end abutment surface 200c of the distal end portion 22c of the movable grasping portion 20.

Therefore, according to the grasping tool 10 for indirect heating line engineering, a variety of objects to be grasped 84 can be grasped at the center portion and the distal end portion of the grasping portion 12. In particular, the above-described operational effect is particularly remarkable in a so-called insulating clamp which is a gripping tool for indirect firing line engineering in which the distal end portion 20c of the movable gripping portion 20 and the distal end portion 22c of the fixed gripping portion 22 cannot intersect with each other.

(modification example)

The present invention is not limited to the above-described embodiments, and various changes can be made according to the idea of the present invention. Other embodiments of the present invention will be described below.

In the above embodiment, the rain guard 16 and the flange 18 are provided at the substantially middle portion of the insulating operation rod 14, but the rain guard 16 and the flange 18 are components for preventing creeping discharge and electric leakage. Therefore, even if the insulating operating rod 14 of the grasping tool 10 for indirect live wire engineering is configured without the rain shield 16 and the flange 18, the effects of the present invention can be obtained similarly to the above-described embodiment.

For example, the rivet 42 that rotatably couples the movable grip portion 20 and the auxiliary insulating operation lever 24 may be formed of a bolt and a nut so that the coupling can be easily released.

The grip tool 10A for indirect firing line engineering according to another embodiment of the present invention may be formed as shown in fig. 9. That is, in the grip 12, the central portion 22b of the fixed grip 22 may be a portion that abuts against the object to be gripped 84 on the inner side in the plane V direction including the axis direction a, may have a first concave portion 22Ab1s that is concave outward, a first convex portion 22Ab1t that is convex inward, and a second concave portion 22Ab2s that is concave outward so as to form a wave shape that curves continuously in the plane V direction including the axis direction a from the base end side toward the front end side, and the central portion 20b of the movable grip 20 may be a portion that abuts against the object to be gripped 84 on the inner side in the plane V direction including the axis direction a, and may have a first concave portion 20Ab1s that is concave outward, a first convex portion 20Ab1t that is convex inward, and a second concave portion 20Ab2s that is concave outward so as to form a wave shape that curves continuously in the plane V direction including the axis direction a from the base end side toward the front end side.

The distal end portion 22c of the fixed grip portion 22 may be constituted by a concave portion 22Acs connected to the distal end side of the central portion 22b and a convex portion 22Act connected to the distal end side of the concave portion 22Acs, and the distal end portion 20c of the movable grip portion 20 may be constituted by a convex portion 20Act connected to the distal end side of the central portion 20b and a concave portion 20Act connected to the distal end side of the convex portion 20 Act. The recess 22Acs which fixes the distal end portion 22c of the grip portion 22 is constituted by a recess inclined surface 22Acs2 and a recess bottom surface 22Acs1, and the projection 22Act is constituted by a projection vertical surface 22Act3, a projection top surface 22Act2, and a projection inclined surface 22Act 1. The convex portion 20Act of the distal end portion 20c of the movable grip portion 20 is constituted by a convex portion vertical surface 20Act3, a convex portion top surface 20Act2, and a convex portion inclined surface 20Act1, and the concave portion 20Act is constituted by a concave portion bottom surface 20Act2 and a concave portion inclined surface 20Act 1.

According to the grasping tool 10A for indirect firing line work, since the same operational effects as those of the grasping tool 10 for indirect firing line work of the above-described embodiment are relatively obtained, various grasping objects 84 can be grasped at the center portion and the distal end portion of the grasping portion 12.

As described above, the embodiments of the present invention are disclosed in the above description, but the present invention is not limited thereto.

That is, various changes can be made in the mechanism, shape, material, number, position, arrangement, and the like of the above-described embodiments without departing from the scope of the technical idea and object of the present invention, and these changes are included in the present invention.

Description of reference numerals

10. 10A, a holding tool for indirect firing line engineering;

12 a holding part;

14 insulating the operating rod;

15 an embedded part for fixing the holding part;

15a base end of the fitting portion;

15c bolt holes of the fitting portions;

15e a bolt of the embedded part;

16 rain shields;

18 a flange;

20a movable holding part;

20a proximal end portion of the movable grip portion;

20b a central portion of the movable holding portion;

20b1s a first recess in the central portion of the movable grip;

20b1t a first protrusion at the center of the movable grip;

20b2s a second recess in the central portion of the movable grip;

201b a central first contact surface;

202b central portion second abutment surface;

20c a front end portion of the movable holding portion;

a projection at the tip of the 20ct movable grip;

20ct1 convex inclined surface;

20ct2 convex top surface;

20ct3 lobe vertical plane;

20cs a recess at the tip of the movable grip;

20cs1 recess floor;

20cs2 recess slope;

200c a front end abutting surface of the movable holding part;

20d bolt holes for movable holding parts;

20e a base end side rivet hole of the movable holding part;

20f a base end of the movable grip portion;

20g long holes for movable holding parts;

22 fixing the holding part;

22a fixing the base end of the holding part;

22av a bent portion for fixing the proximal end portion of the grip portion;

22b fixing the central part of the holding part;

22b1s a first concave part for fixing the central part of the holding part;

22b1t a first protrusion for fixing the center of the grip;

22b2s a second concave portion for fixing the central portion of the holding portion;

221b a central first contact surface;

222b central portion second abutment surface;

223b a third contact surface at the center;

224b a central portion fourth abutment surface;

22c fixing the front end of the holding part;

22cs a recess for fixing the front end of the holding part;

22cs1 recess slope;

22cs2 recess floor;

22ct a projection for fixing the tip of the grip;

22ct1 convex part inclined plane;

22ct2 convex top surface;

22ct3 lobe vertical plane;

220c fixing the front end abutting surface of the holding part;

22d bolt holes for fixing the holding parts;

22g long holes for fixing the holding part;

24 auxiliary insulating operation rod;

25a front end piece of the auxiliary insulating operation rod;

25a base end of the tip;

25b the front end of the front end piece;

25c bolt holes in the front end piece;

25d rivet holes of the front end piece;

25e bolt of front end piece;

26 holding the operation part;

26a operating lever;

26b a support metal member;

26c release the lever;

26d rotating shaft for operation;

26e action pieces;

28 springs;

30 pivots (bolts for connecting the fixed gripping part and the movable gripping part);

42 rivets (rivets for fastening the movable holding part and the auxiliary insulating operation rod);

84 holding an object (a relatively large-diameter wire, a relatively medium-diameter wire, a relatively small-diameter wire, a sheet, a cover, or the like);

the a-axis direction (including the direction passing through the axis of the insulating operating rod and toward the base end or toward the leading end);

b a direction in which the movable grip portion and the fixed grip portion approach and separate from each other (a rotational direction about a pivot of the movable grip portion) by an operation of the grip operation portion;

a V virtual plane (a plane including the axial direction of the insulating operation rod);

a C1 imaginary plane (a plane extending from the bolt hole of the fixed grip portion toward the distal end portion);

a C2 imaginary plane (a plane extending from the bolt hole of the movable grip portion toward the distal end portion);

t1 first substantially enclosed area;

t2 second substantially enclosed area.