阅读说明：本技术 作业工具支撑装置 (Work tool support device ) 是由 大田和健 小仓隆 岩田伸也 于 2018-09-18 设计创作，主要内容包括：本发明提供一种第一支臂与第二支臂之间的连结部的强度较高的作业工具支撑装置。作业工具支撑装置(1、1A、1B)包括支臂部(4)与把持部(3),该把持部是配置在比支臂部更前端侧,且可把持作业工具,支臂部(4)包括第一支臂(41)、第二支臂(42)、及角度变更构件(45),该角度变更构件是配置于第一支臂与第二支臂之间,且可变更第一支臂与第二支臂之间的角度。角度变更构件(45)包括第一部分(451)、第二部分(452)、第一滑动锁定构件(455、455a、455b)、及第一锁定解除构件(456),其中第一部分是以可摆动自如的方式连接于第一支臂,第二部分是以可摆动自如的方式连接于第二支臂,且可相对于第一部分而滑动动自如,第一滑动锁定构件可将第二部分相对于第一部分而设为锁定状态,第一锁定解除构件可解除锁定状态。(The invention provides a work tool support device in which the strength of a joint portion between a first arm and a second arm is high. The work tool support device (1, 1A, 1B) comprises an arm part (4) and a grip part (3), wherein the grip part is arranged at the front end side of the arm part and can grip a work tool, the arm part (4) comprises a first arm (41), a second arm (42), and an angle change member (45), the angle change member is arranged between the first arm and the second arm, and can change the angle between the first arm and the second arm. The angle changing member (45) includes a first portion (451) swingably connected to the first arm, a second portion (452) swingably connected to the second arm and slidable with respect to the first portion, a second portion (455, 455a, 455b) slidably connected to the second arm, and a first lock releasing member (456) capable of releasing the locked state of the second portion with respect to the first portion.)

1. A work tool support device, comprising:

a supporting arm part; and

a grip portion disposed at a distal end side of the arm support portion and detachably supporting the working tool,

wherein the arm support portion includes:

a first support arm;

a second arm connected to the first arm in a manner of freely swinging and capable of fixing an angle relative to the first arm; and

an angle changing member disposed between the first arm and the second arm and capable of changing an angle between the first arm and the second arm,

the angle changing member includes:

a first portion connected to the first arm so as to be swingable;

a second part which is connected to the second arm in a freely swinging manner and can freely slide relative to the first part;

a first slide lock member that sets the second portion to a locked state with respect to the first portion; and

a first lock releasing member that releases the locked state of the first slide lock member.

2. The work tool support apparatus of claim 1, further comprising an energizing potential energy member that energizes the first slide lock member in a locking direction.

3. The work tool support apparatus of claim 1, further comprising a rotational damper disposed between the first arm and the second arm.

4. The work tool support apparatus of claim 2, further comprising a rotational damper disposed between the first arm and the second arm.

5. The work tool support apparatus of any of claims 1 to 4, further comprising:

a foot pedal operable to operate the first lock release member; and

a cord member having a first end connected to the first lock release member and a second end connected to the foot pedal.

6. The work tool support apparatus of claim 5, wherein the arm portion comprises:

a third arm connected to the second arm so as to be swingable and capable of fixing an angle with respect to the second arm; and

a second angle changing member disposed between the second arm and the third arm, the second angle changing member being capable of changing an angle between the second arm and the third arm,

the second angle changing member includes:

a second angle changing member first portion connected to the second arm in a freely swingable manner;

a second angle changing member second portion connected to the third arm so as to be swingable, and slidable with respect to the second angle changing member first portion;

a second slide lock member that locks the second angle changing member second portion with respect to the second angle changing member first portion; and

a second lock releasing member which releases the locked state of the second slide lock member,

the third end of the cord member is connected to the second lock releasing member,

the foot pedal may simultaneously perform the lock release of the first slide lock member and the lock release of the second slide lock member.

7. The work tool support apparatus of any of claims 1 to 4, further comprising:

an attachment portion which is disposed on the base end side of the arm support portion and which is detachably attached to a cage of the high-altitude work vehicle;

a sliding part directly or indirectly mounted on the arm part and horizontally moving integrally with the arm part;

a horizontally moving locking member that locks the slide portion with respect to the mounting portion; and

a horizontal movement operation part mounted on the sliding part,

when the horizontal movement operation portion is pressed in a horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm support portion move in the horizontal first direction,

when the horizontal movement operation portion is pressed in a horizontal second direction, which is a direction opposite to the horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm portion move in the horizontal second direction.

8. The work tool support apparatus of claim 5, further comprising:

an attachment portion which is disposed on the base end side of the arm support portion and which is detachably attached to a cage of the high-altitude work vehicle;

a sliding part directly or indirectly mounted on the arm part and horizontally moving integrally with the arm part;

a horizontally moving locking member that locks the slide portion with respect to the mounting portion; and

a horizontal movement operation part mounted on the sliding part,

when the horizontal movement operation portion is pressed in a horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm support portion move in the horizontal first direction,

when the horizontal movement operation portion is pressed in a horizontal second direction, which is a direction opposite to the horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm portion move in the horizontal second direction.

9. The work tool support apparatus of claim 6, further comprising:

an attachment portion which is disposed on the base end side of the arm support portion and which is detachably attached to a cage of the high-altitude work vehicle;

a sliding part directly or indirectly mounted on the arm part and horizontally moving integrally with the arm part;

a horizontally moving locking member that locks the slide portion with respect to the mounting portion; and

a horizontal movement operation part mounted on the sliding part,

when the horizontal movement operation portion is pressed in a horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm support portion move in the horizontal first direction,

when the horizontal movement operation portion is pressed in a horizontal second direction, which is a direction opposite to the horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm portion move in the horizontal second direction.

10. The work tool support device according to claim 7, wherein the horizontally moving operating portion protrudes toward an inner side of the cage and is operable by a knee.

11. The work tool support device according to claim 8, wherein the horizontally moving operating portion protrudes toward an inner side of the cage and is operable by a knee.

12. The work tool support device according to claim 9, wherein the horizontally moving operating portion protrudes toward an inner side of the cage and is operable by a knee.

Technical Field

The present invention relates to a work tool support device.

Background

Conventionally, a work tool support device is known which can support a work tool such as a bar or a pincer used for cutting and peeling a live wire. The work tool support device has a mounting portion fixed to a cage of the aerial work vehicle, and a gripping portion capable of gripping a work tool.

Patent document 1 describes a free-type auxiliary device for a working tool as a related technique. The free auxiliary device for a working tool described in patent document 1 includes: the tool comprises a clamp for detachably fixing the working tool, a first wrist part, a second wrist part, a first joint part for rotatably connecting the other end of the first wrist part and one end of the second wrist part, and a locking state control mechanism for controlling the rotation state and the locking state of the first joint part.

Prior art documents

Patent document 1: japanese patent laid-open No. 2017-112812.

In the free assist device for a working tool described in patent document 1, the first joint portion is locked by engagement between the gear and the locking member. Therefore, when the cage is unintentionally moved in a state where the first joint section is locked, a force in an out-of-plane direction (a direction intersecting a plane defined by the first arm section and the second arm section) may act on the first joint section, and the gear and the locking member may be disengaged from each other, or the gear or the locking member may be chipped. In this case, since the locking function of the joint portion is lost, the wrist portion is lowered by gravity, and the free assist device becomes unusable.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a work tool support device in which the strength of the coupling portion between the first arm and the second arm is high.

The present invention relates to a work tool support device as described below.

(1) A work tool support device, comprising:

a supporting arm part; and

a grip portion disposed at a distal end side of the arm support portion and detachably supporting the working tool,

wherein the arm support portion includes:

a first support arm;

a second arm connected to the first arm in a manner of freely swinging and capable of fixing an angle relative to the first arm; and

an angle changing member disposed between the first arm and the second arm and capable of changing an angle between the first arm and the second arm,

the angle changing member includes:

a first portion connected to the first arm so as to be swingable;

a second part which is connected to the second arm in a freely swinging manner and can freely slide relative to the first part;

a first slide lock member that sets the second portion to a locked state with respect to the first portion; and

a first lock releasing member that releases the locked state of the first slide lock member.

(2) The work tool support device according to item (1) above, further comprising a potential energy applying member that applies potential energy to the first slide lock member in the lock direction.

(3) The work tool support device according to (1) or (2) above, further comprising a rotation damper disposed between the first arm and the second arm.

(4) The work tool support device according to any one of the above (1) to (3), further comprising:

a foot pedal operable to operate the first lock release member; and

a cord member having a first end connected to the first lock release member and a second end connected to the foot pedal.

(5) The work tool support device according to item (4), wherein the arm portion includes:

a third arm connected to the second arm so as to be swingable and capable of fixing an angle with respect to the second arm; and

a second angle changing member disposed between the second arm and the third arm, the second angle changing member being capable of changing an angle between the second arm and the third arm,

the second angle changing member includes:

a second angle changing member first portion connected to the second arm in a freely swingable manner;

a second angle changing member second portion connected to the third arm so as to be swingable, and slidable with respect to the second angle changing member first portion;

a second slide lock member that locks the second angle changing member second portion with respect to the second angle changing member first portion; and

a second lock releasing member which releases the locked state of the second slide lock member,

the third end of the cord member is connected to the second lock releasing member,

the foot pedal may simultaneously perform the lock release of the first slide lock member and the lock release of the second slide lock member.

(6) The work tool support device according to any one of the above (1) to (5), further comprising:

an attachment portion which is disposed on the base end side of the arm support portion and which is detachably attached to a cage of the high-altitude work vehicle;

a sliding part directly or indirectly mounted on the arm part and horizontally moving integrally with the arm part;

a horizontally moving locking member that locks the slide portion with respect to the mounting portion; and

a horizontal movement operation part mounted on the sliding part,

when the horizontal movement operation portion is pressed in a horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm support portion move in the horizontal first direction,

when the horizontal movement operation portion is pressed in a horizontal second direction, which is a direction opposite to the horizontal first direction, the locked state of the horizontal movement locking member is released, and the slide portion and the arm portion move in the horizontal second direction.

(7) The work tool support device according to item (6) above, wherein the horizontal movement operating portion protrudes inward of the cage, and is operable by a knee.

The present invention can provide a work tool support device in which the strength of the connection portion between the first arm and the second arm is high.

Drawings

Fig. 1 is a schematic side view of a work tool support device according to a first embodiment.

Fig. 2 is a schematic diagram showing an example of a mechanism for locking the second portion with respect to the first portion.

FIG. 3 is a schematic diagram showing another example of a mechanism for locking the second portion relative to the first portion.

Fig. 4 is a schematic side view of a work tool support device according to a second embodiment.

Fig. 5 is a schematic diagram showing an example of a mechanism for locking the second portion of the second angle changing member with respect to the first portion of the second angle changing member.

Fig. 6 is a schematic side view of a work tool support device according to a second embodiment.

Fig. 7 is a schematic side view of a work tool support device according to a second embodiment.

Fig. 8 is a schematic front view of a work tool support device according to a second embodiment.

Fig. 9 is a schematic diagram showing an example of a mechanism for locking the sliding portion with respect to the second guide portion.

Detailed Description

Hereinafter, the work tool supporting apparatus 1 according to the embodiment will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are attached to members having the same functions. Note that, the same or similar reference numerals are attached to members, and a repetitive description thereof may be omitted.

(first embodiment)

A work tool supporting apparatus 1A according to a first embodiment will be described with reference to fig. 1 to 3. Fig. 1 is a schematic side view of a work tool support device 1A according to a first embodiment. Fig. 2 is a schematic diagram showing an example of a mechanism for locking the second part 452 with respect to the first part 451. Fig. 3 is a schematic diagram showing another example of a mechanism for locking the second portion 452 with respect to the first portion 451.

The work tool support device 1A according to the first embodiment includes: a mounting part 2 which can be freely assembled and disassembled to and from a cage of the high-altitude operation vehicle; a grip portion 3 for detachably supporting the working tool T; and a support arm portion 4 disposed between the mounting portion 2 and the grip portion 3. The grip portion 3 is disposed on the distal end side of the arm portion 4, and the mounting portion 2 is disposed on the proximal end side of the arm portion 4.

The mounting portion 2 includes, for example, a base portion 21 and a moving portion 22, and the moving portion 22 is movable toward and away from the base portion 21. The wall portion of the cage is sandwiched between the base portion 21 and the moving portion 22, whereby the mounting portion 2 can be fixed to the cage. The arm portion 4 and the mounting portion 2 may be detachable. In this case, when an existing mounting portion is used as the mounting portion 2, the work tool support apparatus 1A itself does not need to be provided with the mounting portion 2. In other words, the arm portion 4 of the work tool support device 1A may be mounted on the existing mounting portion 2.

The grip portion 3 includes a first grip member 31 and a second grip member 33. The work tool T can be fixed to the grip portion 3 by clamping the work tool T between the first gripping member 31 and the second gripping member 33.

The arm part 4 includes: a first arm 41, a second arm 42, and an angle changing member 45, wherein the angle changing member 45 can change the angle between the first arm 41 and the second arm 42. In the example shown in fig. 1, the first arm 41 is an arm on the mounting portion 2 side, and the second arm 42 is an arm on the gripping portion 3 side. The first arm 41 and the second arm 42 are made of FRP (fiber reinforced plastic), for example.

The second arm 42 is connected to the first arm 41 so as to be swingable (more specifically, so as to be swingable about a swing axis AT 1). In addition, the second arm 42 may be connected at a fixed angle relative to the first arm 41. More specifically, the angle of the second arm 42 with respect to the first arm 41 is fixed by locking the second portion 452 with respect to the first portion 451, which will be described later.

The angle changing member 45 is disposed between the first arm 41 and the second arm 42. The angle changing member 45 changes the angle between the first arm 41 and the second arm 42 by changing the distance between a first swing axis AX1 and a second swing axis AX2, which will be described later. The angle changing member 45 includes: a first portion 451, a second portion 452, a first slide locking member 455 (refer to fig. 2, etc.), and a first lock releasing member 456.

The first portion 451 is swingably connected to the first arm 41 about a first swing axis AX 1. In the example shown in fig. 1, the first arm 41 includes a protruding portion 411, the protruding portion 411 protrudes to the side of the first arm 41, and the protruding portion 411 is provided with a first swing axis AX 1. The first swing axis AX1 is, for example, a central axis of a plug inserted into a hole of the protrusion 411 and a hole of the first portion 451.

The second portion 452 is swingable about a second swing axis AX2, and is connected to the second arm 42. In the example shown in fig. 1, the second arm 42 includes a protruding portion 421, the protruding portion 421 protrudes from a side of the second arm 42, and the second swing axis AX2 is disposed in the protruding portion 421. The second swing axis AX2 is, for example, a central axis of a plug inserted into the hole of the protrusion 421 and the hole of the second part 452.

The second portion 452 is slidable relative to the first portion 451. The distance between the first swing axis AX1 and the second swing axis AX2 can be changed by sliding the second part 452 relative to the first part 451. As a result, the angle between the first arm 41 and the second arm 42 can be changed.

An example of a mechanism for locking the second portion 452 with respect to the first portion 451 will be described with reference to fig. 2.

In the example shown in fig. 2, the angle changing member 45 includes: a first part 451, a second part 452, a first slide locking member 455, a first lock releasing member 456, a load transmitting member 457, and a potential energy imparting member 459.

In the example shown in fig. 2, when the first slide lock member 455 is pressed against both the inner surface of the first portion 451 and the outer surface of the second portion 452, the second portion 452 is locked with respect to the first portion 451. More specifically, in a state where the force is not applied to the first lock releasing member 456, the first slide lock member 455a is pressed against the first portion 451 and the second portion 452 by the energizing force of the first energizing member 459a such as a spring. The first slide lock member 455b is pressed against the first portion 451 and the second portion 452 by the biasing force of the second biasing member 459b such as a spring. As such, the second portion 452 is locked relative to the first portion 451.

On the other hand, when the first lock releasing member 456 receives a force in the direction indicated by the arrow AR1, the load transmission member 457 moves (rotationally moves). When the load transmission member 457 moves (rotates), the first slide lock member 455a moves in a direction away from the inner surface (more specifically, the tapered surface) of the first portion 451, and the first slide lock member 455b moves in a direction away from the inner surface (more specifically, the tapered surface) of the first portion 451 (the state shown in fig. 2). Thus, the lock of the first slide lock member 455 (i.e., the locked state of the second portion 452 with respect to the first portion 451) is released.

Although fig. 2 illustrates an example in which the first slide lock member 455 is a plurality of balls, the number and shape of the first slide lock member 455 are not limited to those shown in fig. 2.

A conventional mechanism different from the mechanism described in fig. 2 may be employed as the mechanism for slidably and lockably connecting the first portion 451 and the second portion 452. For example, a Quick clamp (registered trademark)) manufactured by talksystem corporation, more specifically, a lever unit (model: TUWL08 or TUWL16) manufactured by talksystem corporation may be used. Alternatively, the mechanisms described in the embodiments and reference examples of Japanese patent laid-open No. 2014-66365 may be adopted.

In the example shown in fig. 1 and 2, the load transmission member 457 is movable (rotationally movable) by operating the first lock releasing member 456, and the locked state of the second portion 452 with respect to the first portion 451 is released. In the unlocked state, the angle between the first arm 41 and the second arm 42 can be changed, and the position of the grip 3 can be adjusted.

In a state (normal state) where the operation force is not applied to the first lock releasing member 456, the second portion 452 is in a locked state with respect to the first portion 451. In this way, the angle between the first arm 41 and the second arm 42 can be fixed, and the position of the grip portion 3 can be fixed.

In the free assist device described in patent document 1, since the first joint portion is locked by engagement between the gear and the locking member, the fixed angle between the first arm portion and the second arm portion depends on the tooth interval of the gear. In other words, the fixed angle between the first wrist portion and the second wrist portion is changed in a stepwise manner, and cannot be changed in a continuous manner. Meanwhile, the work tool supporting apparatus 1A according to the first embodiment includes an angle changing member 45, the angle changing member 45 being capable of changing the angle between the first arm 41 and the second arm 42, the angle changing member 45 including a first portion 451, a second portion 452, a first slide lock member 455, and a first lock releasing member 456, the second portion 452 being slidable with respect to the first portion 451, the first slide lock member 455 being capable of setting the second portion 452 in a locked state with respect to the first portion 451, and the first lock releasing member 456 being capable of releasing the locked state of the first slide lock member 455. Therefore, the fixed angle between the first arm 41 and the second arm 42 can be changed in a continuous manner.

Further, in the work tool support apparatus 1A according to the first embodiment, the first arm 41 and the second arm 42 are swingably connected, the angle changing member 45 (more specifically, the first portion 451) and the first arm 41 are swingably connected, and the angle changing member 45 (more specifically, the second portion 452) and the second arm 42 are swingably connected. In other words, the first arm 41, the second arm 42, and the angle changing member 45 constitute a triangular structure (unit cell of a truss structure). Therefore, even if an unexpected force acts in a direction intersecting the plane defined by the first arm 41 and the second arm 42, the force is dispersed not only to the connecting portion between the first arm 41 and the second arm 42 but also to the connecting portion between the angle changing member 45 (the first portion 451) and the first arm 41 (the projection 411) and the connecting portion between the angle changing member 45 (the second portion 452) and the second arm 42 (the projection 421). Therefore, the strength of the coupling portion between the first arm 41 and the second arm 42 can be increased. Therefore, strength can be maintained even if the thicknesses of the first arm 41 and the second arm 42 are made thin, and therefore the work tool support device 1A can be made lightweight.

In the free assist device for a working tool described in patent document 1, when the engagement between the gear and the locking member is disengaged or the gear or the locking member is chipped, the locking function is lost, the wrist portion is lowered by gravity, and the free assist device becomes unusable. On the other hand, in the work tool supporting apparatus 1A according to the first embodiment, even if the cage is unintentionally moved and an excessive load is applied to the surfaces defined by the first arm 41 and the second arm 42 in the state where the first arm 41 and the second arm 42 are locked, the first portion 451 and the second portion 452 of the angle changing member 45 slide, and the load is dissipated. Further, since the first portion 451 and the second portion 452 can be locked again after the load is dispersed, the range of the first arm 41 and the second arm 42 descending by gravity is limited. Therefore, after the load disappears, the operation can be restarted from the position where the first part 451 and the second part 452 are locked again, and therefore, the convenience of the operation can be improved. In addition, since the first portion 451 and the second portion 452 slide, the work tool supporting apparatus 1A is less likely to be damaged.

As described above, in the work tool supporting apparatus 1A in the first embodiment, the angle changing member 45 includes a plurality of different functions (effects) as follows: an angle adjusting function of adjusting the angle between the first arm 41 and the second arm 42, an angle fixing function of fixing the angle between the first arm 41 and the second arm 42, a reinforcing function and a light weight of increasing the strength of the coupling portion between the first arm 41 and the second arm 42, and an improvement in work convenience and prevention of damage when an overload is applied are performed in a continuous manner. Further, the angle fixation between the first arm 41 and the second arm 42 can be released by simply operating the first lock releasing member 456, so that the work load is small.

In the example shown in fig. 2, the angle changing member 45 includes a biasing member 459 for biasing the first slide lock member 455 in the lock direction. A potential energy applying member 459 is included to maintain the angle between the first arm 41 and the second arm 42 in a state where the operation force is not applied to the first lock releasing member 456 (i.e., a normal state) in the case where the first slide locking member 455 is biased in the locking direction. Therefore, even when some kind of trouble occurs in the work tool support device 1A, the grip 3 does not suddenly descend. Therefore, the safety of the operator can be ensured.

(one-way locking)

In the example shown in fig. 2, the locking of the second part 452 with respect to the first part 451 is a two-way locking. Alternatively, the locking of the second part 452 with respect to the first part 451 may also be a one-way locking. In other words, in the locked state of the first slide lock member 455, although the second portion 452 cannot move in the first direction with respect to the first portion 451, it can move in the second direction, which is the opposite direction of the first direction. For example, in the example shown in fig. 3, when the second portion 452 is pulled in the first direction, the first portion 451 and the second portion 452 increase the force of sandwiching the first slide lock member 455, and therefore the second portion 452 cannot move in the first direction. In contrast, when the second portion 452 is pulled in the second direction, the clamping force of the first portion 451 and the second portion 452 with respect to the first slide lock member 455 is reduced, and therefore the second portion 452 can move in the second direction.

Referring to fig. 1, the case where the second part 452 is moved in the second direction with respect to the first part 451 corresponds to the case where the grip 3 is moved upward. That is, when the one-way lock is adopted as the lock of the second part 452 with respect to the first part 451, the grip 3 can be moved upward even in the locked state. This facilitates the operation of moving the grip 3 upward. Even when unidirectional locking is employed, since the grip portion 3 does not fall in the locked state, the position of the grip portion 3 is not hindered.

(mechanism for operating first lock releasing member 456)

A mechanism for operating the first lock releasing member 456 is explained with reference to fig. 1. Work tool support device 1A includes a foot board 7 and a cord member 8, wherein foot board 7 is operable with first lock release member 456, first end 81 of cord member 8 is connected to first lock release member 456, and second end 82 is connected to foot board 7.

In the example shown in fig. 1, when the foot pedal 7 is stepped on, the rope member 8 is pulled and the first lock releasing member 456 is operated. When the first lock releasing member 456 is operated, the locked state of the first slide lock member 455 (the locked state of the second portion 452 with respect to the first portion 451) is released. Further, it is preferable that the rope member 8 is disposed in the pipe 85, and the rope member 8 is slidably supported by the pipe 85.

In the case where the work tool supporting apparatus 1A includes the foot pedal 7, the operation of the first lock releasing member 456 may be performed by a foot. Thus, the locked state of the first slide lock member 455 can be released in a state where the worker supports the work tool T with both hands or with one hand. Therefore, the burden on the operator can be reduced. On the other hand, when the first lock releasing member 456 is operated by hand, the operator needs to support the work tool T (or the grip portion 3 or the arm portion 4) with one hand. Alternatively, the first lock releasing member 456 must be released by another operator.

Further, when the force acting on the footrest 7 is transmitted to the first lock releasing member 456 by the rope member 8, the transmission mechanism is simple in structure and high in reliability . In contrast, when the transmission mechanism of the hydraulic pressure is used, the weight of the work tool support device 1A increases, and the structure of the work tool support device 1A becomes complicated. Furthermore, there is a risk of oil leakage.

The foot pedal 7 is, for example, a switching type foot pedal. In this case, when the foot pedal 7 is depressed once, the locked state of the first slide lock member 455 is released, and when the foot pedal 7 is depressed again, the second portion 452 is locked with respect to the first portion 451 by the first slide lock member 455. Further, it is preferable that the lock release state is maintained even when the foot is separated from the foot rest 7 after the foot rest 7 is depressed. In this case, the operator can perform the position adjustment operation of the grip 3 while standing both feet on the floor surface.

Alternatively, the foot pedal 7 may be a foot pedal other than a switching type. For example, it can be designed such that: the locked state of the first slide lock member 455 is released when the foot pedal 7 is depressed, and the locked state of the first slide lock member 455 is maintained when the foot is released from the foot pedal 7.

Further, it is also possible to design: in a state where the foot pedal 7 is stepped halfway, the first slide lock member 455 becomes an intermediate state between the locked state and the unlocked state. In this case, the position of the work tool T can be finely adjusted by applying a force to the work tool T (or the grip portion 3 or the arm portion 4).

(Rotary damper 49)

The work tool support device 1A according to the first embodiment may include a rotation damper 49, and the rotation damper 49 may be disposed between the first arm 41 and the second arm 42. The rotary damper 49 provides a resistive force when the second arm 42 swings with respect to the first arm 41. Therefore, when the locked state of the first slide lock member 455 is released, the grip 3 and the second arm 42 do not drop abruptly. Therefore, when the locked state is released, the weight force of the work tool T, the grip 3, and the second arm 42 is not abruptly applied to the operator holding the work tool T. Therefore, the convenience of the operator can be improved.

Further, in the case where the work tool supporting apparatus 1A includes the rotary damper 49, even if the angle changing member 45 is damaged so that the angle maintaining function between the first arm 41 and the second arm 42 in the normal state (the state where the operating force is not applied to the first lock releasing member 456) is lost, the grip 3 and the second arm 42 are not abruptly lowered. In this case, the work tool support device 1A has the angle maintaining function in the normal state by the angle changing member 45 and the resistance imparting function by the rotary damper 49, and the safety of the operator can be secured by both of these functions.

(mounting part 2)

In the example shown in fig. 1, the mounting portion 2 includes a base portion 21, a moving portion 22, and a moving portion operating portion 23, and the moving portion 22 is movable toward and away from the base portion 21. In the example shown in fig. 1, the base 21 has a first leg 211, a second leg 212, and a connecting portion 213 that connects the first leg 211 and the second leg 212 in a side view. The first leg 211 is disposed to face a first surface (for example, an inner surface) of a side wall of the cage, and the second leg 212 is disposed to face a second surface (for example, an outer surface) of the side wall of the cage.

The moving part operating part 23 is attached to the second leg part 212, and the moving part 22 can be moved closer to the first leg part 211 by operating the moving part operating part 23. In this way, the wall of the cage is clamped between the moving portion 22 and the first leg 211, and the mounting portion 2 is fixed to the wall of the cage.

In the example shown in fig. 1, the base portion 21 has an inverted U-shape in a side view. Therefore, even if the fixing of the mounting portion 2 to the cage wall portion is insufficient and the mounting portion 2 slides down, the upper portion of the inverted U shape (i.e., the connection portion 213) can be caught on the upper edge of the cage wall portion. Therefore, the mounting portion 2 does not fall off the cage wall portion.

(second embodiment)

A work tool supporting apparatus 1B according to a second embodiment will be described with reference to fig. 4 to 9. Fig. 4, 6, and 7 are schematic side views of a work tool supporting apparatus 1B according to a second embodiment. Fig. 4 shows a state in which the arm portion 4 of the work tool support device 1B is extended by a predetermined amount, fig. 6 shows a state in which the arm portion 4 of the work tool support device 1B is extended further than the state shown in fig. 4, and fig. 7 shows a state in which the arm portion 4 of the work tool support device 1B is folded. Fig. 5 is a schematic diagram showing an example of a mechanism for locking the second angle changing member second portion 552 with respect to the second angle changing member first portion 551. Fig. 8 is a schematic front view of a work tool support device 1B according to a second embodiment. Fig. 9 is a schematic diagram showing an example of a mechanism for locking the slide portion 92 with respect to the second guide portion 29.

In the work tool supporting apparatus 1B according to the second embodiment, the boom portion 4 includes the third boom 53 in addition to the first boom 41 and the second boom 42. The arm portion 4 includes a second angle changing member 55 in addition to the angle changing member 45, and the second angle changing member 55 can change the angle between the second arm 42 and the third arm 53. The third arm 53 is made of FRP (fiber reinforced plastic), for example.

In the second embodiment, differences from the first embodiment will be mainly described, and descriptions overlapping with those already described in the first embodiment will be omitted.

In the example shown in fig. 4, the base end portion of the first arm 41 is connected to the mounting portion 2 (more specifically, the top surface of the base portion 21). The connection between the base end portion of the first arm 41 and the mounting portion 2 may be a horizontally movable connection that allows the first arm 41 to move horizontally with respect to the mounting portion 2, or the connection between the base end portion of the first arm 41 and the mounting portion 2 may be a rotatable connection that allows the first arm 41 to rotate around the longitudinal axis of the first arm 41, or the connection between the base end portion of the first arm 41 and the mounting portion 2 may be a non-horizontally movable and non-rotatable connection.

In the example shown in fig. 4, the base end of the second arm 42 is connected to the tip end of the first arm 41, and the angle changing member 45 is disposed between the second arm 42 and the first arm 41. Since the first arm 41, the second arm 42, and the angle changing member 45 have been described in the first embodiment, redundant description is omitted.

In the example shown in fig. 4, the base end of the third arm 53 is connected to the tip end of the second arm 42, and a second angle changing member 55 is disposed between the third arm 53 and the second arm 42.

The third arm 53 is connected to the second arm 42 in a swingable manner (more specifically, swingable about a swing axis AT 2). In addition, third arm 53 may be connected at a fixed angle relative to second arm 42. More specifically, the angle of the third arm 53 with respect to the second arm 42 is fixed by locking a second angle changing member second portion 552 to be described later with respect to a second angle changing member first portion 551.

The second angle changing member 55 is disposed between the second arm 42 and the third arm 53. The second angle changing member 55 changes the angle between the second arm 42 and the third arm 53 by changing the distance between a third swing axis AX3 described later and a 4 th swing axis AX4 described later. The second angle changing member 55 includes: a second angle changing member first portion 551, a second angle changing member second portion 552, a second slide locking member 555 (see fig. 5), and a second lock releasing member 556.

The second angle changing member first portion 551 is swingable about a third swing axis AX3 and is connected to the second arm 42. The third swing axis AX3 is, for example, a central axis of a pin inserted into a hole of the second arm 42 and a hole of the second angle changing member first portion 551.

The second angle changing member second portion 552 is connected to the third arm 53 so as to be swingable about the 4 th swing axis AX 4. The 4 th swing axis AX4 is, for example, a central axis of a plug inserted into a hole of the third arm 53 and a hole of the second angle changing member second portion 552.

The second angle changing member second portion 552 is slidable with respect to the second angle changing member first portion 551. The distance between the third swing axis AX3 and the 4 th swing axis AX4 can be changed by sliding the second angle changing member second portion 552 relative to the second angle changing member first portion 551. As a result, the angle between the second arm 42 and the third arm 53 can be changed.

The mechanism for locking the second angle changing member second portion 552 with respect to the second angle changing member first portion 551 is the same as the mechanism for locking the second portion 452 with respect to the first portion 451, and therefore, redundant description is omitted. In the above description of the "mechanism for locking the second portion 452 with respect to the first portion 451", the "angle changing member 45", "the first portion 451", "the second portion 452", "the" first slide locking member 455, 455a, 455b "," the "first lock releasing member 456", "the" load transmitting member 457 "," the "potential applying member 459", "the" first potential applying member 459a "," the "second potential applying member 459 b", "fig. 1", "fig. 2", "the" first arm 41 ", and" the "second arm 42" are respectively replaced with "the" second angle changing member 55 "," the "second angle changing member first portion 551", "the" second angle changing member second portion 552 "," the "second slide locking member 555, 555a, 555 b", "the" second lock releasing member 556 "," the "load transmitting member 557", "the" potential applying member 559 The "first energizing member 559 a", "second energizing member 559 b", "fig. 4", "fig. 5", "second arm 42", and "third arm 53" may be illustrative of a mechanism for locking the second angle changing member second portion 552 with respect to the second angle changing member first portion 551. The locking of the second angle changing member second portion 552 with respect to the second angle changing member first portion 551 may be bidirectional locking or unidirectional locking.

The work tool support device 1B according to the second embodiment can exhibit the same effects as the work tool support device 1A according to the first embodiment. In addition, the arm portion 4 of the work tool supporting apparatus 1B in the second embodiment includes 3 arms (the first arm 41, the second arm 42, and the third arm 53). Therefore, the degree of freedom in positioning the work tool T and the degree of freedom in the approach path when moving the work tool T to a desired position are high. The number of arms provided in the arm portion 4 of the work tool support device 1B in the second embodiment may be 4 or more.

Further, the work tool supporting apparatus 1B according to the second embodiment includes the second angle changing member 55, the second angle changing member 55 being capable of changing the angle between the second arm 42 and the third arm 53, the angle changing member 55 including a second angle changing member first portion 551, a second angle changing member second portion 552, a second slide lock member 555, and a second lock releasing member 556, the second angle changing member second portion 552 being slidable with respect to the second angle changing member first portion 551, the second slide lock member 555 being capable of bringing the second angle changing member second portion 552 into a locked state with respect to the second angle changing member first portion 551, and the second lock releasing member 556 being capable of releasing the locked state of the second slide lock member 555. Therefore, the fixed angle between the second arm 42 and the third arm 53 can be changed in a continuous manner.

In the work tool supporting apparatus 1B according to the second embodiment, the second arm 42, the third arm 53, and the second angle changing member 55 are configured to have a triangular structure (unit cell of a truss structure) as in the first embodiment. Therefore, the strength of the joint between the second arm 42 and the third arm 53 can be increased.

Preferably, in the second embodiment, the work tool support device 1B includes the foot board 7 and the rope member 8, wherein the foot board 7 can operate the first lock release member 456 and the second lock release member 556, the first end portion 81 of the rope member 8 is connected to the first lock release member 456, the second end portion 82 is connected to the foot board 7, and the third end portion 83 is connected to the second lock release member 556.

In the example shown in fig. 4, when the foot pedal 7 is depressed, the cord member 8 is pulled, and the first and second lock release members 456 and 556 are operated. When the first and second unlocking members 456 and 556 are operated, the locked state of the first slide lock member 455 and the locked state of the second slide lock member 555 are simultaneously unlocked. Further, the rope member 8 may be a rope connecting the first unlocking member 456 and the foot board 7 and a rope connecting the second unlocking member 556 and the foot board 7, which are different ropes from each other. Alternatively, a cord connecting the first lock release member 456 and the footboard 7 and a cord connecting the second lock release member 556 and the footboard 7 may be partially shared.

When the work tool support device 1B includes the foot pedal 7 and the rope member 8 connected to the first unlocking member 456 and the second unlocking member 556, the first unlocking member 456 and the second unlocking member 556 can be simultaneously unlocked by the foot. This eliminates the need to perform the lock releasing operation individually, and therefore, the work efficiency is high. Further, the same pedal as the pedal 7 in the first embodiment may be adopted as the pedal 7 in the second embodiment.

(Rotary damper 59)

The work tool supporting apparatus 1B according to the second embodiment may include a rotation damper 59, and the rotation damper 59 may be disposed between the second arm 42 and the third arm 53. The rotation damper 59 can give a resisting force when the third arm 53 swings with respect to the second arm 42. Therefore, when the locked state of the second slide lock member 555 is released, the grip portion 3 and the third arm 53 do not drop sharply. Therefore, as in the first embodiment, the convenience of the operator can be improved.

(swinging neck 6)

In the example shown in fig. 4, the work tool support device 1B includes a swing neck 6, and the swing neck 6 is connected to the arm portion 4 (more specifically, the third arm 53) so as to be swingable.

The swing neck 6 is connected to the tip of the third arm 53. Further, a third angle changing member 65 is disposed between the swing neck 6 and the third arm 53.

The swing neck 6 is connected to the third arm 53 in a swingable manner (more specifically, swingable about a swing axis AT 3). Furthermore, the swing neck 6 can be connected in a fixed angular manner with respect to the third arm 53. More specifically, the angle of the swing neck 6 with respect to the third arm 53 is fixed by setting the third angle changing member second portion 652 to the locked state with respect to the third angle changing member first portion 651.

The third angle changing member 65 is disposed between the third arm 53 and the swing neck 6. The third angle changing member 65 changes the angle between the third arm 53 and the swing neck 6 by changing the distance between a 5 th swing axis AX5 described later and a 6 th swing axis AX6 described later. The third angle changing member 65 includes: a third angle changing member first portion 651, a third angle changing member second portion 652, a third slide locking member (illustration omitted), and a third lock releasing member 656.

The third angle changing member first portion 651 is swingably connected to the third arm 53 about a 5 th swing axis AX 5. The third angle changing member second portion 652 is connected to the swing neck portion 6 so as to be swingable about the 6 th swing axis AX 6.

Third angle changing member second portion 652 is slidable with respect to third angle changing member first portion 651. The distance between the 5 th swing axis AX5 and the 6 th swing axis AX6 can be changed by sliding the third angle changing member second portion 652 relative to the third angle changing member first portion 651. As a result of which the angle between the third arm 53 and the swing neck 6 can be changed.

The mechanism for locking the third angle changing member second portion 652 with respect to the third angle changing member first portion 651 is the same as the mechanism for locking the second portion 452 with respect to the first portion 451, and therefore, redundant description is omitted.

In the case where the work tool supporting apparatus 1B includes the swing neck 6, the rope member 8 connected to the foot board 7 desirably includes the 4 th end 84 connected to the third lock releasing member 656.

In the example shown in fig. 4, when the foot pedal 7 is depressed, the rope member 8 is pulled, and the first unlocking member 456, the second unlocking member 556, and the third unlocking member 656 are operated. When the first, second, and third unlocking members 456, 556, and 656 are operated, the locked state of the first slide locking member 455, the locked state of the second slide locking member 555, and the locked state of the third slide locking member are simultaneously unlocked.

When the number of arms provided in the arm portion 4 is N (N is a natural number of 2 or more), the swing neck portion 6 is connected to the end arm, that is, the nth arm, so as to be swingable.

In the example shown in fig. 4, the pivot axis AT1 between the first arm 41 and the second arm 42 and the pivot axis AT2 between the second arm 42 and the third arm 53 are parallel to each other, but the pivot axis AT1 and the pivot axis AT2 may be non-parallel to each other. In the example shown in fig. 4, the pivot axis AT2 between the second arm 42 and the third arm 53 and the pivot axis AT3 between the third arm 53 and the pivot neck 6 are parallel to each other, but the pivot axis AT2 and the pivot axis AT3 may be non-parallel to each other.

In the second embodiment, it is preferable that the angle formed between the first arm 41 and the second arm 42 is larger than 90 degrees and the angle formed between the second arm 42 and the third arm 53 is larger than 90 degrees in the extended state of the arm portion 4 (see fig. 6). In this case, the grip 3 can be brought to a position far apart from the cage. In the second embodiment, it is preferable that the angle formed between the first arm 41 and the second arm 42 is 90 degrees or less and the angle formed between the second arm 42 and the third arm 53 is 90 degrees or less in the folded state of the arm portion 4 (see fig. 7). In this case, the arm portion 4 can be folded to be compact. In the example shown in fig. 7, the second arm 42 and the third arm 53 are parallel to each other in a state where the arm 4 is folded.

(holding part 3)

The grip portion 3 is a support arm (e.g., a third support arm 53) connected to the swing neck portion 6 or the tip end. The connection between the grip 3 and the swing neck 6 or the arm at the distal end may be a rotatable connection or a non-rotatable connection.

The grip portion 3 is not particularly limited as long as it can grip the work tool T, and in the example shown in fig. 4, the grip portion 3 has a first grip member 31 (fixed member) and a second grip member 33 (movable member), and the second grip member 33 is movable in parallel with respect to the first grip member 31 through 2 left and right guide rods 32. The guide bar body 32 fixed vertically upward from the longitudinal direction of the first holding member 31 is a guide hole (not shown) inserted through the second holding member 33 that is movable in parallel. Further, a coil spring 34 is fitted to the guide rod body 32, and the coil spring 34 is used to maintain the second grip member 33 at an appropriate interval with respect to the first grip member 31, thereby facilitating the insertion of the work tool. The first holding member 31 and the second holding member 33 have holding portions (not shown) formed on their facing surfaces, the holding portions being capable of holding a work tool and having a substantially V-shaped cross section. Further, a lock member 36 is connected to the second grip member 33, and an operation portion 37 is attached to the lock member 36, and the operation portion 37 can operate the locking operation and the unlocking operation of the lock member 36.

When the tool T is gripped by the gripping portion 3, the tool T is inserted between the first gripping member 31 and the second gripping member 33, and the operation portion 37 is operated to move the lock member 36, thereby bringing the second gripping member 33 close to the first gripping member 31. Thus, the work tool T can be held between the first holding member 31 and the second holding member 33.

(horizontal movement mechanism of arm part 4)

Referring to fig. 8, the arm portion 4 can also be connected to the mounting portion 2 and can move in a horizontal first direction and a horizontal second direction opposite to the horizontal first direction. In this case, the position of the arm portion 4 can be adjusted in the horizontal direction with respect to the mounting portion 2.

In the example shown in fig. 8, the work tool support device 1B includes a slide portion 92, a horizontal movement lock member 95 (see fig. 9), and a horizontal movement operation portion 90, wherein the slide portion 92 is directly or indirectly attached to the arm portion 4 and moves horizontally integrally with the arm portion 4, the horizontal movement lock member 95 can lock the slide portion 92 with respect to the attachment portion 2, and the horizontal movement operation portion 90 is attached to the slide portion 92.

Further, the work tool support device 1B may include a guide portion that can guide the horizontal movement of the arm portion 4 or the arm portion receiving portion of the mounting portion 2. The guide portion 28 is, for example, a guide rail 281 provided in the mounting portion 2. The guide rail 281 extends in the width direction of the mounting portion 2 (in other words, in the horizontal direction, and in parallel to the wall surface of the cage). In the example shown in fig. 8, the guide rail 281 is disposed on the top surface of the base portion 21 of the mounting portion 2. Therefore, the movement of the arm portion 4 does not interfere with the worker in the cage.

The slide portion 92 is directly or indirectly attached to the arm portion 4 (more specifically, the first arm 41), and moves horizontally integrally with the arm portion 4. The horizontal movement locking member 95 (see fig. 9) can lock the slide portion 92 with respect to the second guide portion 29. In the example shown in fig. 8, the second guide portion 29 is provided in the mounting portion 2. Therefore, the horizontal movement locking member 95 can also be said to be a locking member for prohibiting the horizontal movement of the arm part 4 (more specifically, the first arm 41) with respect to the mounting part 2. The second guide 29 is, for example, a second guide rail 291, and the second guide rail 291 extends in a direction parallel to the guide 28 (guide rail 281).

In the example shown in fig. 9, the work tool support device 1B includes a second guide portion 29, a slide portion 92 that is slidable with respect to the second guide portion 29, a horizontal movement locking member 95, a potential energy imparting member 99, and a horizontal movement operating portion 90. The energizing member 99 energizes the horizontal movement lock member 95 in the lock direction.

In the example shown in fig. 9, when the horizontal movement locking member 95 is pressed against both the inner surface of the sliding portion 92 and the outer surface of the second guide portion 29, the sliding portion 92 is locked with respect to the second guide portion 29. More specifically, in a state where the force is not applied to the horizontal movement operation portion 90 (i.e., in the neutral state of the horizontal movement operation portion 90), the first horizontal movement locking member 95a is pressed against the slide portion 92 and the second guide portion 29 by the biasing force of the first biasing member 99a such as a spring. The second horizontal movement locking member 95b is pressed against the slide portion 92 and the second guide portion 29 by the energizing power of a second energizing member 99b such as a spring. Thus, the slide portion 92 is locked with respect to the second guide portion 29.

In the example shown in fig. 9, when the horizontally moving operation unit 90 is pressed in the horizontal first direction, the lock of the horizontally moving lock member 95 is released, and the pressing force to the horizontally moving operation unit 90 acts on the slide unit 92, so that the support arm unit 4 moves in the horizontal first direction together with the slide unit 92. More specifically, when the horizontal movement operating portion 90 receives a force in the direction indicated by the arrow AR2, the load transmission member 97 moves (rotates). When the load transmission member 97 moves (rotates), the first horizontal movement locking member 95a moves in a direction away from the inner surface (more specifically, tapered surface) of the sliding portion 92, and the second horizontal movement locking member 95b moves in a direction away from the inner surface (more specifically, tapered surface) of the sliding portion 92 (the state shown in fig. 9). In this way, the locking of the horizontal movement locking member 95 (i.e., the locked state of the slide portion 92 with respect to the second guide portion 29) is released. Since a force acts on the slide portion 92 in the direction indicated by the arrow AR2 through the horizontal movement operation portion 90, the slide portion 92 and the arm portion 4 move in the direction indicated by the arrow AR 2.

In the example shown in fig. 9, when the horizontally moving operation unit 90 is pressed in the horizontal second direction, the lock of the horizontally moving lock member 95 is released, and the pressing force to the horizontally moving operation unit 90 acts on the slide unit 92, so that the support arm portion 4 moves in the horizontal second direction together with the slide unit 92. More specifically, when the horizontal movement operating portion 90 receives a force in the direction indicated by the arrow AR3, the load transmission member 97 moves (rotates). When the load transmission member 97 moves (rotates), the first horizontal movement locking member 95a moves in a direction away from the inner surface (more specifically, tapered surface) of the sliding portion 92, and the second horizontal movement locking member 95b moves in a direction away from the inner surface (more specifically, tapered surface) of the sliding portion 92. In this way, the locking of the horizontal movement locking member 95 (i.e., the locked state of the slide portion 92 with respect to the second guide portion 29) is released. Since a force acts on the slide portion 92 in the direction indicated by the arrow AR3 through the horizontal movement operation portion 90, the slide portion 92 and the arm portion 4 move in the direction indicated by the arrow AR 3.

In the example shown in fig. 9, when the horizontal movement operation portion 90 is pressed in the horizontal first direction (or the horizontal second direction), the locked state of the horizontal movement locking member 95 is released, and the arm portion 4 moves in the horizontal first direction (the horizontal second direction). Therefore, the lock release and the horizontal movement of the arm portion 4 can be achieved by a single operation. Therefore, when the position of the arm portion 4 is adjusted in the horizontal direction, the burden on the operator can be reduced, and the work efficiency of the operator can be improved.

Preferably, the horizontal movement operating portion 90 is disposed so as to protrude from the base portion 21 toward the inside of the cage, so that the operator can operate the horizontal movement operating portion with the knees. By arranging the horizontal movement operating portion 90 at a position where it can be operated with knees, the work tool support device 1B can be moved to the left and right with respect to the cage even in a state where both hands are occupied. Further, it is preferable that the horizontal movement operating portion 90 is disposed at a height close to the top surface of the base portion 21 so as to be operated by the knees of the operator, and for example, may be disposed within the following range: ranging from a position 60cm below the top surface of the base 21 to a position 10cm above the top surface of the base 21.

Although fig. 9 illustrates an example in which the horizontal movement locking members 95 are a plurality of balls, the number and shape of the horizontal movement locking members 95 are not limited to those illustrated in fig. 9.

A conventional mechanism different from the mechanism shown in fig. 9 may be adopted as the mechanism for slidably and lockably connecting the sliding portion 92 and the second guide portion 29. For example, a Quick clamp (registered trademark)) manufactured by talksystem corporation, more specifically, a lever unit (model: TUWL08 or TUWL16) manufactured by talksystem corporation may be used. Alternatively, the mechanisms described in the examples and reference examples of japanese patent laid-open No. 2014-66365 may be used.

The present invention is not limited to the above embodiments, and it should be understood that the embodiments may be modified or changed as appropriate within the scope of the technical idea of the present invention. In addition, any of the components used in the embodiments may be combined with other embodiments, and any of the components may be omitted in the embodiments.

For example, the configurations of the guide portions (28, 29), the horizontal movement locking member 95, and the horizontal movement operating portion 90 described in the second embodiment may be adopted in the first embodiment.

In the second embodiment, the example in which the arm portion receiving portion 24 of the arm portion 4 or the mounting portion 2 is guided by the guide portion 28 and the slide portion 92 is guided by the second guide portion 29 is described. Alternatively, the guide portion of the guide arm portion 4 or the arm portion receiving portion 24 of the mounting portion 2 and the guide portion of the guide slide portion 92 may be the same guide portion.

In the above embodiment, an example is described in which the first portion 451 is an outer tube member, and the second portion 452 is an inner shaft inserted into the first portion 451. Alternatively, the second portion 452 may be an outer tube member and the first portion 451 is an inner shaft inserted into the second portion 452.

In the above embodiment, the first arm 41, the second arm 42, and the third arm 53 are each made of FRP (fiber reinforced plastic). Alternatively, the first arm 41, the second arm 42, and the third arm 53 may be made of a light metal such as an aluminum alloy.

In the first or second embodiment, the work tool support device 1 may be provided with a winch hook 11 (see fig. 1 and 5), and the winch hook 11 may be used to suspend the work tool support device 1 by a crane or the like. In the example shown in fig. 1 and 5, the winch hook 11 is provided on the arm portion 4.

Industrial applicability

By using the supporting device for the working tool, the strength of the connecting part between the first supporting arm and the second supporting arm can be improved. Therefore, the present invention is useful for manufacturers of work tool supporting apparatuses and manufacturers who support work tools by using the work tool supporting apparatuses to perform work.

Description of the symbols:

1. 1A, 1B work tool support device

2 mounting part

3 grip part

4 support arm part

6 swinging neck

7 foot pedal

8 rope component

11 winch hook

21 base part

22 moving part

23 moving part operating part

24 arm receiving part

28 guide part

29 second guide part

31 first holding member

32 guide rod body

33 second holding member

34 helical spring

36 locking member

37 operating part

41 first arm

42 second support arm

45-degree changing member

49 rotary damper

53 third arm

55 second angle changing member

59 rotary damper

65 third angle changing member

81 first end part

82 second end portion

83 third end part

84 th end part

85 pipe fitting

90 horizontal movement operating part

92 sliding part

95 horizontal movement locking member

95a first horizontal movement locking member

95b second horizontal movement locking member

97 load transmission member

99 endowing potential energy component

99a first imparting potential energy member

99b second potential energy imparting member

211 first leg part

212 second leg

213 connecting part

281 guide rail

291 second guide track

411 nose part

421 protruding part

451 first part

452 second part

455. 455a, 455b first slide lock member

456 first lock release member

457 load transmission member

459 member for applying potential energy

459a first potential energy applying member

459b second potential energy applying member

551 first part of a second angle-changing member

552 second angle changing member second part

555. 555a, 555b second slide locking member

556 second unlocking member

557 load transmission member

559a potential energy imparting member

559a first potential energy imparting member

559b second potential energy imparting member

651 third Angle Change Member first portion

652 third angle changing member second part

656 third latch release member

T-shape working tool