CN108698229B

CN108698229B - Front end tool connecting structure

Info

Publication number: CN108698229B
Application number: CN201780005599.XA
Authority: CN
Inventors: 中村幸司; 冲中泰树; 宫迫祥明; 山本朋也
Original assignee: Cec Corp; Nagaki Seiki Co Ltd
Current assignee: Cec Corp; Nagaki Seiki Co Ltd
Priority date: 2016-01-12
Filing date: 2017-01-12
Publication date: 2021-08-17
Anticipated expiration: 2037-01-12
Also published as: TWI702121B; KR102173056B1; KR20180109924A; CN108698229A; TW201729955A; JP6590704B2; JP2017124451A; WO2017122753A1

Abstract

Provided is a tip tool coupling structure capable of quickly and reliably replacing a tip tool even with a remote control lever composed of a plurality of control levers and capable of maintaining good insulation with a simple structure. The tip tool coupling structure (1) is composed of a coupling (20) at the tip of a remote control lever (12) and a plug part (7) of a tip tool (2). The plug portion (7) has an annular groove (7a) and an engagement shaft (7 b). The connector (20) is composed of a plug part receiving part (22) at the front end side and a tube part (30) at the hand side. A lock ball (26a) embedded in a housing portion (26) of a plug portion receiver (22) is pressed in a diameter reduction direction by an inner protrusion (28b) of an externally provided sleeve portion (28). The locking ball (26a) is fitted into the annular groove (7a) to lock the coupled state. In the remote control lever (12), an insertion part (18a) is inserted in a state that a flange part (18b) of a plug body (18) is locked with an opening edge. The cylinder (30) is arranged to cover the remote control lever (12) and the flange (18 b).

Description

Front end tool connecting structure

Technical Field

The present invention relates to a tool connection structure for connecting a tool for remote operation, which is capable of safely operating a component such as an overhead line to which a high voltage is applied from a remote distance, in a replaceable manner during an overhead line construction.

Background

An example of a prior art remotely operated grip 100 is shown in fig. 6. In the construction of an overhead wire, when a live wire work is performed, the side of the hand must be insulated from the work object. Therefore, the main lever 114 and the sub lever 116 of the remote lever 112 are generally made of FRP material (fiber reinforced composite material) having electrical insulation.

However, even if the insulating material is used, when the work is performed in a rainy day, rainwater may flow from the distal end side to the hand side, and a conductive accident may occur. Therefore, as shown in fig. 6, umbrella-shaped rain shields 101 are provided at a plurality of positions. Thus, the insulating state between the distal end side and the hand side can be maintained well, and the operation can be performed safely.

However, in the stringing work, a plurality of tools are used in different ways depending on the use such as gripping and cutting. However, in a work using a skip car, the number of tools needs to be minimized due to the weight of the hand tool and the work space. Therefore, conventionally, a weight reduction has been achieved by combining an exchangeable tip tool with the tip of the remote operation lever 112 that is commonly used.

In the remote operation grip 100 shown in fig. 6, a grip pair 102, which is an exchangeable tip tool, is also used. The fixed gripper 104 and the movable gripper 106 of the pair of gripper members 102 are detachably coupled to the main operating lever 114 and the sub operating lever 116, respectively.

Specifically, the concave-convex fitting portion 114a provided at the distal end of the main operating lever 114 is coupled to the concave-convex fitting portion 104a on the fixed gripper 104 side, and the coupled state is fixed by passing the pin 120 in a direction orthogonal to the concave-convex fitting direction. Similarly, the coupling state between the concave-convex fitting portion 116a provided at the distal end of the sub-operation lever 116 and the concave-convex fitting portion 106a on the movable gripper 106 side is fixed by passing the pin 122 in a direction orthogonal to the concave-convex fitting direction.

In this way, the tools can be replaced, and therefore, the parts of the remote operation lever 112 can be shared, thereby achieving weight saving and cost reduction. Patent document 1 describes a remote operation grip 100 having the above-described structure.

Documents of the prior art

Patent document

Patent document 1: japanese utility model registration No. 3159865

Disclosure of Invention

Technical problem to be solved by the invention

However, in the configuration shown in fig. 6, when the pair of grippers 102 is coupled to the remote control lever 112, it is necessary to perform an operation of inserting the plug 120 while maintaining the coupled state between the main lever 114 and the fixed gripper 104. The coupling between the sub-operation lever 116 and the movable gripper 106 also requires the same operation. In this way, when fine work is performed while maintaining balance at a high-place work position, the work must be performed carefully because parts may fall off, and the work efficiency is reduced.

In the case of a forceps-type distal end tool such as the pair of grippers 102 shown in fig. 6, two levers, i.e., the main operating lever 114 and the sub operating lever 116, must be connected to each other, and therefore, at least one of them cannot be fastened and fixed by the entire rotary shaft.

In addition, since the coupling portion between the distal end tool and the remote control lever is generally configured by combining a plurality of members, a sealing structure against raindrops or the like becomes complicated. Therefore, the weight and cost increase due to the increase in the number of parts may occur.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a tip tool coupling structure capable of quickly and reliably exchanging a tip tool even with a remote control lever including a plurality of control levers and capable of maintaining good insulation with a simple structure.

Technical scheme for solving technical problem

In order to achieve the above object, a distal end tool coupling structure according to the present invention is a distal end tool coupling structure of a remote control lever having a distal end provided with a plug receiver that locks a plug portion in a coupled state by pressing a part of locking balls arranged in a circumferential direction into an annular groove formed in an outer circumferential surface of the plug portion of a distal end tool, the distal end tool coupling structure including: a plug body having an insertion portion inserted into a front end side of the remote operation lever and a flange portion radially protruding so as to be engaged with an opening edge of the front end side of the remote operation lever; and a coupling member having a cylindrical portion on a hand side thereof for covering a part of a distal end side of the remote operation lever together with the flange portion, the coupling member having the plug portion receiver on a distal end side thereof.

In addition, in the tool tip coupling structure according to the present invention, in addition to the above structure, the following structure is adopted: the plug portion receiving member includes: a socket part into which the plug part is inserted; a housing portion in which the socket portion is provided and the lock balls are arranged in a circumferential direction; and a sleeve portion which is disposed on an outer peripheral surface of the housing portion so as to be slidable in contact therewith, has an inner protrusion portion on an inner sliding contact surface which is capable of pressing the lock ball in a diameter reduction direction in accordance with a sliding motion, and has a notch formed in a part of an end edge on a hand side, the sleeve portion has a hollow stopper pin, the stopper pin is disposed so as to protrude in a diameter expansion direction of the housing portion such that one end thereof is inserted into a boundary between the opening edge and the flange portion and the other end thereof is capable of abutting against the end edge on the hand side of the sleeve portion or being accommodated in the notch, and the stopper pin has a slit extending in a longitudinal direction.

In addition, in the tool tip coupling structure according to the present invention, in addition to the above structure, the following structure is adopted: the front end tool includes: a fixed-side half body having the plug portion at an axial end; a movable half body supported by a shaft so as to be rotatable relative to the fixed half body, the movable half body being formed into a caliper shape; and a connecting pin which is swingably connected to the movable side half body and has the plug portion on a free end side, wherein the remote operation lever includes: a main shaft having the plug receiver connectable to the plug of the fixed side half body; and an operation shaft having the plug receiver connectable to the plug of the connecting pin, wherein the plug and the socket connecting the fixed-side half body and the main shaft are polygonal in a number of components smaller than the number of components of the plug and the socket connecting the movable-side half body and the operation shaft.

In addition, in the tool tip coupling structure according to the present invention, in addition to the above structure, the following structure is adopted: the front end tool includes: a fixed-side half body having the plug portion at an axial end; a movable half body supported by a shaft so as to be rotatable relative to the fixed half body, the movable half body being formed into a caliper shape; and a connecting pin which is swingably connected to the movable side half body and has the plug portion on a free end side, wherein the remote operation lever includes: a main shaft having the plug receiver connectable to the plug of the fixed side half body; and an operation shaft having the plug receiver connectable to the plug of the connecting pin, wherein the plug and the socket connecting the fixed-side half body to the main shaft are polygonal, and the plug and the socket connecting the movable-side half body to the operation shaft are circular.

(effect of the invention)

As described above, according to the present invention, since the opening of the distal end of the remote control lever is blocked by the insertion portion and the flange portion of the plug body and the opening edge and the flange portion of the remote control lever are covered by the tube portion of the plug receiver, rainwater or the like flowing in through the plug receiver or the like does not enter the inside of the remote control lever by bypassing the flange portion, and thus it is possible to prevent a conductive accident through the internal structure. Further, since the plug portion and the plug portion receiver in the coupled state can be locked by the locking ball, the tip end tool can be easily and quickly replaced. Thus, the safety and the working efficiency can be improved at the same time.

Further, according to the present invention, in addition to the above-described effects, the following effects are also provided: the tip tool can be attached and detached by one action by the sliding operation of the sleeve portion, and the hollow-structured stopper pin having the slit formed in the longitudinal direction extends from the boundary between the opening edge and the flange portion to the outside of the housing portion.

Further, according to the present invention, in addition to the above-described effects, the following effects are also provided: in both the fixed-side half body and the movable-side half body, each of which is formed of a polygonal plug portion, the number of faces constituting the polygonal plug portion of the fixed-side half body is small, and therefore, the increment of the angle in the circumferential direction when the fixed-side half body is coupled is large. Thus, the optical pickup device can be easily and accurately positioned in the optimum direction without being confused with the installation angle. In contrast, in the movable half body, when the fixed half body is first coupled, rough positioning can be performed at the same time. Therefore, the movable half body, which has many connecting portions due to structural reasons and is not easily positionally stabilized as compared with the fixed half body, is required to be finely positioned, and therefore, positioning is facilitated when the polygonal plug portion having a larger number of surfaces than the fixed half body is included.

Further, according to the present invention, in addition to the above-described effects, the following effects are also provided: since the fixed-side half body is formed of the polygonal plug portion, the number of faces forming the polygonal plug portion is limited at a position which can be set in the circumferential direction at the time of connection, and positioning is easy. In contrast, since the movable-side half bodies are formed of circular plugs, even in a structure in which there are many connecting portions and the positions are difficult to stabilize, smooth connection can be performed without limiting the installation angle.

Drawings

Fig. 1 is a perspective view showing a tip tool coupling structure according to an embodiment of the present invention in a partially cut-away state.

Fig. 2 shows the distal end tool coupling structure of fig. 1, fig. 2 (a) is a side view, and fig. 2 (b) is a cross-sectional view as viewed from the front.

Fig. 3 is a view showing a remote control lever having the distal end tool coupling structure of fig. 1.

Fig. 4 is a view showing a jaw-type tip tool.

Fig. 5 is a view showing a cutter type tip tool.

Fig. 6 is a diagram showing a conventional remote operation holder.

Detailed Description

Hereinafter, a tip tool coupling structure according to an embodiment of the present invention will be described with reference to the drawings. First, the configuration of the present invention will be described with reference to fig. 1, and the operation will be described with reference to fig. 2.

Referring to fig. 1, the distal end tool coupling structure 1 is composed of a plug portion 7 of the distal end tool 2 and a coupling 20 provided on the distal end side of the remote operation lever 12. Here, for convenience of explanation, the links 20 and the remote operation lever 12 are partially shown in a cutaway view to facilitate understanding of the internal structure.

As shown in fig. 1, the direction of the plug 7 when fitted to the coupler 20 is indicated by an arrow on the side of the long side of the remote control lever 12, and the direction of the plug when detached is indicated by an arrow on the distal end side of the remote control lever 12. The tip tool 2 will be described in detail later, and fig. 1 shows only the configuration around the shaft end coupled to the coupling 20.

An annular groove 7a is formed in the circumferential direction on the outer circumferential surface of the plug portion 7 of the tip tool 2. Further, a fitting shaft 7b having a hexagonal cross-sectional shape is provided at the shaft end.

On the other hand, the coupler 20 is composed of a plug receiver 22 on the distal end side and a tube portion 30 on the hand side. The plug receiver 22 includes a substantially cylindrical housing portion 26 and a sleeve portion 28 disposed on an outer peripheral surface of the housing portion 26 in slidable contact therewith.

The housing 26 is provided with a socket 24 for receiving the fitting shaft 7b of the plug 7 of the leading end workpiece 2. The socket portion 24 is hexagonal like the fitting shaft 7 b.

On the tip side of the socket portion 24, four locking balls 26a are arranged in the circumferential direction. The lock ball 26a is disposed with play so as to partially project in the diameter reduction direction.

When the sleeve 28 slides on the outer periphery of the housing portion 26, the lock ball 26a is pressed in the diameter-reducing direction by the contact of an inward protrusion 28b of a sliding contact surface 28a (see fig. 2 (a)) provided on the inner side. With the above-described configuration, when the fitting shaft 7b is fitted into the socket portion 24 and the sleeve portion 28 presses the lock ball 26a in a state where the plug portion 7 is coupled to the plug receiver 22, the tip of the lock ball 26a enters the annular groove 7a of the plug portion 7, and the coupled state is locked. Further, a stopper ring 26b is provided on the outer peripheral side in the vicinity of the opening on the front end side of the case portion 26. Thus, when the sleeve portion 28 slides toward the distal end side, the inner protrusion 28b abuts against the stopper ring 26b to restrict the sleeve portion 28 from sliding toward the distal end side, and therefore, the sleeve portion 28 does not fall off from the housing portion 26.

The sleeve portion 28 is biased toward the distal end side with respect to the case portion 26 by a biasing spring 27 disposed on the outer periphery of the case portion 26. Therefore, in a state where no external force is applied, the sleeve portion 28 is positioned on the distal end side in a state where the inner protrusion 28b abuts against the stopper ring 26b, and the lock ball 26a is in a state where it is pressed toward the diameter reduction side by the inner protrusion 28 b. Therefore, when the plug portion 7 is coupled to the plug receiver 22, the sleeve portion 28 needs to be slid toward the hand side against the biasing force in order to set the lock ball 26a to a free state. After the connection, in order to stabilize the operation state, it is necessary to fix the sleeve portion 28 to the distal end side to maintain the locked state.

In the sleeve portion 28 of the plug receiver 22 of the present embodiment, a notch 28c is formed on the hand side. On the other hand, a tube 30 extends from the plug receiver 22 toward the hand side. A stopper pin 32 is provided in the cylindrical portion 30 so as to protrude in the vicinity of the edge on the hand side of the sleeve portion 28 and extend in the diameter expansion direction of the remote control lever 12.

The diameter of the stopper pin 32 is set to a size that can be accommodated in the notch 28c of the sleeve portion 28. The depth of the notch 28c is set to the following size: when the sleeve portion 28 is slid toward the hand side by the stopper pin 32 being accommodated in the notch 28c, the inner protrusion 28b of the sleeve portion 28 can be separated from the lock ball 26 a.

Therefore, when the sleeve portion 28 is rotated in the circumferential direction relative to the case portion 26 so that the notch 28c is aligned with the position of the stopper pin 32, the locking ball 26a is retracted in the diameter expansion direction by the kinetic energy of the sleeve portion 28 sliding toward the hand side, and therefore, the plug portion 7 and the plug receiver 22 can be coupled.

Further, when the sleeve portion 28 is rotated in the circumferential direction to a position where the portion of the end edge on the hand side of the sleeve portion 28 other than the notch 28c can be brought into contact with the stopper pin 32, the sliding of the sleeve portion 28 on the hand side is restricted by the stopper pin 32, and therefore, the state in which the lock ball 26a projects in the diameter reduction direction is maintained, and the coupled plug portion 7 is locked with the plug receiver 22.

Next, attention is paid to a coupling portion between the tube portion 30 and the remote control lever 12.

A plug 18 is attached to the distal end of the remote control lever 12 so as to fill the opening. The plug 18 is formed to have substantially the same diameter as the inner diameter of the remote control lever 12, and has: an inserting portion 18a, the inserting portion 18a being inserted and arranged inside the remote operation lever 12; and a flange 18b, wherein the flange 18b is locked with the opening edge 16a of the remote control lever 12. Further, a socket fitting portion 18c that can be fitted into the socket portion 24 is formed at a position on the tip end side of the flange portion 18 b. The tube portion 30 is arranged to cover the plug body 18 and the distal end side of the remote control lever 12 arranged as described above.

One end of the stopper pin 32 is embedded in a boundary position between the flange portion 18b of the plug 18 and the opening edge 16a of the remote control lever 12. In the present embodiment, a structure using a spring pin is shown as an example of the stopper pin 32. The stopper pin 32 has a hollow structure, and may not be a spring pin as long as a slit is formed in the longitudinal direction. Here, the slit 32a of the stopper pin 32 is disposed toward the circumferential direction of the remote control lever 12.

Next, the operation of the distal end tool coupling structure 1 will be described with reference to fig. 2.

Fig. 2 is an enlarged view of the distal end side of the remote lever 12 and the link 20. Fig. 2 (a) is a side view as viewed from the fitting direction, and fig. 2 (b) is a cross-sectional view as viewed from the front.

In the case where a tool is wet by rainwater in rainy weather or the like, it is necessary to maintain a good insulation state between the tip side and the hand side. However, as described above, in the distal end tool coupling structure 1 of the present embodiment, the housing portion 26 and the cylindrical portion 30 of the plug receiver 22 are hollow structures. Therefore, in the event of rain drops or the like entering from the distal end side of the housing portion 26, there is a possibility that water flows toward the distal end side of the remote operation lever 12 via the inside.

However, in the distal end tool coupling structure 1, the shoulder portion 26c is formed so as to project in the diameter reduction direction on the inner side of the plug receiver 22 connected to the tube portion 30, and therefore the flange portion 18b of the plug body 18 is interposed between the shoulder portion 26c and the opening edge 16a of the remote control lever 12. The flange portion 18b is extended to the enlarged diameter side so as to be substantially the same as the diameter of the opening edge 16a of the remote control lever 12, and therefore, even when raindrops or the like enter from the front end side of the housing portion 26, the raindrops or the like are discharged from the socket portion 24 to the outer peripheral surface of the remote control lever 12 through between the shoulder portion 26c and the flange portion 18 b. The path of the water discharged in this manner is indicated by the arrows of the chain line in the figure.

In the distal end tool coupling structure 1, the stopper pin 32 having a hollow structure is disposed between the opening edge 16a and the flange portion 18b of the remote control lever 12. The slit 32a of the stopper pin 32 is disposed in the circumferential direction. Accordingly, the water retained between the opening edge 16a and the flange 18b of the remote control lever 12 flows into the inside of the stopper pin 32 through the slit 32a and is discharged to the outside. The path of water discharge at this time is indicated by a dotted arrow in the figure.

As described above, the distal end tool coupling structure 1 according to the present embodiment is configured such that raindrops or the like entering the distal end side of the coupler 20 are easily discharged to the outside without flowing to the inside of the remote control lever 12. Further, since the insertion portion 18a of the plug 18 is inserted into the distal end of the remote control lever 12 and the hand side is sealed by the rubber plug 34, the penetration of moisture into the hand side through the inside of the remote control lever 12 can be almost completely prevented.

Next, a remote operation tool using the tip tool coupling structure 1 will be described with reference to fig. 3 to 5.

Fig. 3 shows a remote control stick 12 comprising a main shaft 14 and an operating shaft 16. The operation shaft 16 is configured to be reciprocatingly movable in the longitudinal direction by an operation lever 17 provided rotatably on the hand side. A coupling 20 constituting the tip tool coupling structure 1 shown in fig. 1 and 2 is provided on the tip end side of the operating shaft 16. A coupling 21 similar to the distal end tool coupling structure 1 is also provided on the distal end side of the spindle 14. The difference between the coupling 20 on the operating shaft 16 side and the coupling 21 on the main shaft 14 side is: the socket 24 of the coupler 20 is formed in a hexagonal shape, while the socket of the coupler 21 is formed in a quadrangular shape. Since the other configurations are the same, the detailed configuration of the coupling 21 provided in the main shaft 14 is not shown, and reference is instead made to fig. 1 and 2.

Fig. 4 shows the pliers-shaped tool 2 attached to the remote control lever 12 of fig. 3. The tip tool 2 is configured to: the fixed half 4 coupled to the main shaft 14 of the remote lever 12 of fig. 3 and the movable half 8 coupled to the operating shaft 16 of the remote lever 12 via the connecting pin 10 are pivotally supported so as to be relatively rotatable. The distal end tool coupling structure 1 shown in fig. 1 is a coupling structure between the plug portion 7 on the free end 10a side of the connecting pin 10 and the operating shaft 16 of the remote operation lever 12, as an example.

The plug portion 5 is also provided on the axial end side of the fixed side half body 4, as on the free end 10a side of the connecting pin 10. An annular groove 5a is formed in the outer peripheral surface of the plug portion 5, and a quadrangular fitting shaft 5b is provided on the shaft end side. The connection structure of the plug portion 5 and the spindle 14 is also the same as the tip tool connection structure 1 of fig. 1.

When the tool 2 having the above-described structure is coupled to the remote control lever 12 shown in fig. 3, first, the plug 5 of the fixed side half body 4 is coupled to the spindle 14. At this time, since the fitting shaft 5b of the plug portion 5 is formed in a quadrangular shape, the coupling position can be selected at intervals of 90 degrees in the circumferential direction. That is, since the angle increment is larger than that of a hexagonal fitting structure or the like, the plug portion 7 of the connecting pin 10 and the operation shaft 16 can be aligned without being confused in the installation direction, and the work efficiency can be improved.

On the other hand, the plug portion 7 side is provided with a certain amount of play at a coupling portion between the movable side half body 8 and the connecting pin 10, and also with a play at a coupling portion between the operating shaft 16 and the operating lever 17, in order to reduce resistance at the time of turning operation. Therefore, the coupling pin 10 and the operation shaft 16 are likely to be displaced in the axial direction.

However, in the tool coupling structure 1 of the present embodiment, since the hexagonal fitting shaft 7b and the socket portion 24 are used in the connection portion between the connection pin 10 and the operation shaft 16, fitting can be performed by rotating the shaft by 60 degrees at most in order to eliminate misalignment, and fitting is easier than fitting in a square shape.

Fig. 5 shows a cutter-type nose tool 52 attached to the remote control lever 12 of fig. 3. The front end tool 52 is configured to: the fixed half 54 coupled to the main shaft 14 of the remote lever 12 of fig. 3 and the movable half 58 coupled to the operating shaft 16 of the remote lever 12 via the connecting pin 10 are pivotally supported so as to be relatively rotatable. Here, the connecting pin 10 has the same configuration as the pliers-shaped tip tool 2 shown in fig. 4, and therefore, the same reference numerals are given thereto. As described above, the tool coupling structure 1 according to the present embodiment can accommodate tools of various shapes such as the

tool bits

2 and 52.

The fixed half 54 of the tip tool 52 shown in fig. 5 also includes a plug 55 at the axial end, and the plug 55 has an annular locking groove 55a and a quadrangular fitting shaft 55b, as in the tip tool 2 shown in fig. 4. Accordingly, when the plug 55 is connected to the spindle 14 of the remote control lever 12, the connecting pin 10 of the movable half 58 can be easily positioned, and the work can be efficiently performed.

As described above, according to the distal end tool coupling structure 1 of the present embodiment, the locked state and the unlocked state of the coupled state can be easily switched by simply sliding the sleeve portion 28, and positioning can be easily performed by combining the rectangular plug portion 5 and the hexagonal plug portion 7, so that the work efficiency can be improved.

In addition, as described above, since the moisture entering the coupling portion can be efficiently discharged to the outside without entering the interior of (the main shaft 14 and the operation shaft 16 of) the remote operation lever 12, the insulating state between the distal end side and the hand side can be maintained well, and the safety of the work can be improved.

In the above embodiment, the notch 28c of the sleeve portion 28 is formed only at one portion of the end edge as an example, but may be formed at a plurality of portions.

In the above embodiment, the stopper pin 32 is shown by way of example in which the slits 32a are arranged in the circumferential direction, but the direction in which the slits 32a are formed is not limited to the circumferential direction as long as the slits 32a are arranged so as to guide the water retained via the boundary between the flange portion 18b of the plug body 18 and the opening edge of the remote control lever 12 into the stopper pin 32.

In the above-described embodiment, a configuration in which the main shaft side includes a rectangular plug portion and the operation shaft side includes a hexagonal plug portion is shown as an example. However, the present invention is not limited to this, and when the polygonal plug portions are used on both the spindle side and the operation shaft side, positioning can be easily performed in any combination as long as the polygonal plug portions have fewer number of construction surfaces on the spindle side than on the operation shaft side, and work efficiency can be improved.

In addition, as a configuration in which the operation shaft side can be easily connected, it is also conceivable to provide a circular plug portion on the operation shaft side. In contrast, if the spindle side includes the polygonal plug portion, the direction of installation of the spindle connection is limited by the number of faces constituting the polygonal plug portion, and therefore positioning can be easily performed. Further, in the operation shaft having a larger number of coupling portions than the main shaft and a correspondingly larger amount of play due to structural reasons, coupling is facilitated when a circular plug portion is used, the circumferential direction of which is not restricted.

Industrial applicability

The tool tip connection structure of the present invention can improve the workability and ensure the safety of a two-axis remote control lever including a main shaft and an operation shaft, and is therefore useful for applications using a remote control lever of a forceps-type tool tip in particular.

Description of the symbols

1 front end tool connecting structure

2. 52 front end tool

4. 54 fixed side half body

5. 7, 55 plug part

5a, 7a, 55a annular groove

5b, 7b, 55b fitting shaft

8. 58 movable side half body

10 connecting pin

10a free end

12 remote control stick

14 spindle

16 operating shaft

16a opening edge

17 operating handle

18 bolt body

18a inserting part

18b flange part

18c socket insert

20. 21 connecting part

22 plug socket

24 socket part

26 housing part

26a locking ball

26b stop collar

26c shoulder

27 urging spring

28 sleeve part

28a sliding contact surface

28b inner protrusion

28c gap

30 barrel part

32 spacing pin

32a slit

34 rubber bolt

100 remote operated grip

101 rain shield

112 remote control stick

114 main operating lever

116 minor operating lever

102 pair of holding members

104 fixed holding piece

106 movable holding piece

104a, 106a, 114a, 116a concave-convex fitting parts

120. 122 are pinned.

Claims

1. A front end tool connection structure is characterized in that,

the tip tool coupling structure is a tip tool coupling structure of a remote control lever provided with a plug receiver at a tip, the plug receiver being capable of locking a plug portion in a coupled state by pressing a part of circumferentially arranged locking balls into an annular groove formed in an outer peripheral surface of the plug portion of the tip tool,

the front end tool coupling structure includes:

a plug body having an insertion portion inserted into a front end side of the remote operation lever and a flange portion radially protruding so as to be capable of being engaged with an opening edge of the front end side of the remote operation lever; and

and a coupling member having a cylindrical portion on a hand side thereof for covering a part of a distal end side of the remote operation lever and the flange portion, wherein the plug portion receiver is provided on the distal end side of the coupling member.

2. The front end tool coupling structure according to claim 1,

the plug portion receiver includes:

a socket portion into which the plug portion is fitted;

a housing portion in which the socket portion is provided and the lock balls are arranged in a circumferential direction; and

a sleeve portion which is disposed on an outer peripheral surface of the case portion so as to be capable of sliding contact, has an inner protrusion on an inner sliding contact surface capable of pressing the lock ball in a diameter reduction direction in accordance with sliding, and has a notch formed in a part of an end edge on a hand side,

the barrel portion has a hollow stopper pin, the stopper pin is disposed so as to protrude in the diameter expansion direction of the housing portion such that one end thereof is inserted into a boundary between the opening edge and the flange portion and the other end thereof can be brought into contact with an end edge on the hand side of the sleeve portion or accommodated in the notch, and the stopper pin is formed with a slit extending in the longitudinal direction.

3. The front end tool coupling structure according to claim 2,

the front end tool includes:

a fixed side half body having the plug portion at a shaft end;

a movable half body supported by a shaft so as to be rotatable with respect to the fixed half body, the movable half body being formed into a caliper shape; and

a connecting pin swingably coupled to the movable side half body and having the plug portion on a free end side,

the remote operation lever includes:

a spindle having the plug receiver connectable to the plug of the fixed side half body; and

an operating shaft having the plug receiver connectable to the plug of the connecting pin,

the plug portion and the socket portion that connect the fixed-side half body to the main shaft are polygonal in shape having fewer number of surfaces than the number of surfaces that connect the movable-side half body to the operating shaft.

4. The front end tool coupling structure according to claim 2,

the front end tool includes:

a fixed side half body having the plug portion at a shaft end;

the remote operation lever includes:

the plug portion and the socket portion that connect the fixed side half body and the spindle are polygonal,

the plug portion and the socket portion that connect the movable-side half body and the operation shaft are circular.