TWI764158B - Jib for aerial work vehicle - Google Patents

Abstract

The present invention provides a jib which can be arranged parallel to one side of the bucket and can easily correct the effects of deflection and the like. The jib 1 connects the base-side arm member 2 and the tool mounting arm member 4 via the movable connecting portion 6, and is configured in an L-shape. The jib 1 has one end of the base-side arm member 2 attached to a base 52 that supports a bucket 51 of an aerial work vehicle. The tool mounting arm 4 is extended to the side surface of the bucket 51 where the base 52 is not provided, and can support tools. When deflection occurs due to the weight of the supported tool or the like and the front end is inclined, the angle is adjusted so as to be horizontal by the movable connection portion 6 .

Description

Jib for aerial work vehicle

The present invention relates to a jib for an aerial work vehicle, which is used to support a tool such as an insulating operating rod used on a bucket in the operation of connecting live lines between power distribution line fortifications using the aerial work vehicle.

The maximum load-bearing weight of the bucket of the aerial work vehicle used in the construction of power distribution lines, etc., is usually about 200 to 250 kg. Assuming that it is 250kg and 2 workers are on board, this alone takes up about half of the allowable weight. Not only heavy-duty tools are used during operation, but there is also the possibility that the work object, that is, a part of the distribution line, may be partially loaded. Therefore, it is not easy to consider the selection of tools that limit the weight. In addition, depending on the situation, there are cases in which work efficiency is sacrificed due to emphasis on safety.

On the other hand, in the operation on the bucket, an insulated operating rod of about 2 meters is usually used. The operation of the tool with the help of the insulated operating rod requires skilled skills, especially in the operation of manipulating heavy tools, which will increase the physical burden of the operator. Therefore, in order to reduce the burden on the worker and enable the unskilled worker to work stably, it is desirable to perform the work in a state where the tools are fixed as much as possible. However, in order to use the bucket to support a heavy tool, the bucket needs to be reinforced, and the weight of the reinforcing member must also be taken into consideration, and it is not easy to distribute the weight.

In order to solve the above-mentioned problem of carrying weight, improve the workability and reduce the burden on the operator, a jib is conventionally used. FIG. 9 shows the structure of a conventional jib.

As shown in FIG. 9 , a base 102 is provided at the front end of the main arm 100 . The base 102 supports the side surface of the bucket 103 and supports the jib 101 above. The jib 101 is rotatable around the base 102, and its posture can be changed according to the work situation. The jib 101 is not attached to the bucket 103 but is attached to the base 102 side that supports the bucket 103 . That is, the bucket 103 and the jib 101 are respectively prescribed with a maximum load capacity (both are about 200 to 250 kg). Therefore, when a tool (not shown) is supported on the side of the jib 101, the weight on the side of the bucket 103 is less likely to change greatly, so that not only the operator can work safely, but also the burden on the operator can be greatly reduced. Patent Document 1 describes such a jib 101 . [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2016-116331

(The problem that the invention intends to solve)

However, as the material of the jib 101, FRP material is often used like the insulating lever. Therefore, as described above, when a tool or the like is attached to the jib 101 attached to the base 102 in a one-armed manner, it may bend downward due to its weight. Then, in order to correct the inclination amount of the jib 101 used as the foot stand, it is necessary to adjust the interval with the power distribution line again, and the operation becomes complicated.

In addition, depending on the content of the work, there are cases where it is necessary to change the arrangement of the tools. In this case, simply sliding the tool along the jib 101 is not sufficient, and readjustment of the height and the like is required every time the position on the jib 101 is changed.

Therefore, in this invention, the objective is to provide the jib which can be provided in parallel with one side of a bucket, and can correct the influence of deflection etc. easily. (Technical means to solve problems)

In order to achieve the above object, the jib for an aerial work vehicle of the present invention is a jib for an aerial work vehicle that is mounted on a base that supports a bucket for aerial work and supports a tool, and is characterized in that it includes: a base A side arm member that is mounted on the base substantially horizontally; a tool mounting arm member to which the tool is attached; and at least one connecting portion that forms an angle of 90 degrees and can be connected to the base side arm member and the above-mentioned between the tool mounting arms.

Furthermore, in the jib for an aerial work vehicle of the present invention, in addition to the above-mentioned configuration, it is characterized in that the connecting portion is a movable connecting portion whose axis direction relative to the base-side arm member can be determined only from a predetermined direction. The tool mounting arm is connected to the base-side arm in a substantially L-shape so that the angle can be turned upward and the angle can be adjusted.

Further, in addition to the above configuration, the jib for an aerial work vehicle according to the present invention is characterized in that the movable connection portion includes: a first accommodating portion for accommodating the base-side arm member; and a second accommodating portion for accommodating the above-mentioned a tool mounting arm; a rotation shaft which is erected in the storage direction of the first storage part and becomes the rotation center of the second storage part; at least one predetermined shaft which penetrates the second storage part and is connected with the rotation A shaft is erected on the first receiving portion in parallel to define the rotation range of the second receiving portion; and an adjustment screw is screwed on a position where the front end can be abutted in a rotational direction perpendicular to the predetermined axis. The position on the second storage portion is adjusted by the screw advance and retreat to adjust the angle of the second storage portion.

Further, in the jib for an aerial work vehicle of the present invention, in addition to the above-mentioned configuration, the above-mentioned adjustment screws are screwed so as to be opposed to each other so as to be able to abut from two opposite directions of the above-mentioned predetermined axis. on the above-mentioned second receiving portion.

Moreover, in the jib for an aerial work vehicle of the present invention, in addition to the above configuration, the predetermined angle is characterized in that the predetermined angle is an angle within a range of 10 degrees up and down, respectively, based on the horizontal. (Compared to the efficacy of the prior art)

As described above, according to the present invention, in the case of working on the overhead wire, if the bucket and the tool mounting arm are arranged in parallel with the overhead wire, even if the position of the tool and the like is changed on the tool mounting arm, it can be connected to the overhead wire. The distance between the wires is kept constant, so tools can be moved freely without operating the bucket. In addition, since the base-side arm member and the tool-mounting arm are connected by at least one connecting portion that can be connected at an angle of 90 degrees, depending on the number of connecting portions used, it is possible to The arrangement of the arm members on the base side may be configured in an L-shape, or may be configured in an I-shape.

Furthermore, according to the present invention, in addition to the above-mentioned effects, since the front end can be formed in an L-shape to surround the side surface of the bucket without the base, the jib can be arranged at a position away from the bucket. In addition, since the angle of the tool mounting arm can be adjusted around the axis of the arm member on the base side by the movable connection portion, even if it is composed of a member that is prone to deflection, the inclination can be easily corrected so that it becomes a horizontal position. Moreover, since it is connected so as to be rotatable only upward, it is possible to set or move the tool in a state where the load on the movable connection portion is reduced by raising the tool mounting arm.

In addition, according to the present invention, in addition to the above-mentioned effects, the second accommodating portion of the accommodating tool mounting arm member can be rotated relative to the first accommodating portion of the base-side arm member with respect to the one erected on the first accommodating portion. The shaft rotates, and the angle adjustment is performed by adjusting screws for adjusting the amount of advance and retraction with respect to at least one predetermined axis. In this way, a mechanism for rotation and angle adjustment can be constituted by a simple and lightweight member composed of at least two rotating shafts, a predetermined shaft, and one adjusting screw.

Furthermore, according to the present invention, in addition to the above-mentioned effects, since the adjustment screws are screwed in opposite directions through a predetermined axis, even if they are turned upside down with respect to the base and arranged in any direction, the same operation can be performed. operation, so that the working position can be freely selected according to the situation.

In addition, according to the present invention, in addition to the above-mentioned effects, by setting the angle adjustment range of 10 degrees up and down, not only the lifting tool mounting arm can absorb the inclination caused by deflection, but also the height can be adjusted according to the work content.

Hereinafter, a jib for an aerial work vehicle (hereinafter simply referred to as a jib) according to an embodiment of the present invention will be described with reference to the drawings.

(first embodiment) FIG. 1 is a perspective view showing the use state of the jib 1 of the present invention.

Specifically, the usage status of the live line work between power distribution line constructions using the bucket 51 of the aerial work vehicle is displayed. In FIG. 1 , a part of the bucket 51 of the aerial work vehicle is shown, and the jib 1 of the present invention, which is provided integrally with the bucket 51 , is shown with a tool or the like used in indirect live line work. Among them, for the convenience of description, the structure of the periphery of the bucket 51 is schematically shown.

The jib 1 is mounted above a base 52, which is provided at the front end of a main boom (not shown) extending from the aerial work vehicle. The base 52 supports the bucket 51 on which the worker rides on the side. The jib 1 is formed in a substantially L-shaped shape, and one end thereof is mounted on the base 52 in a cantilevered manner in the horizontal direction. As shown in the figure, the jib 1 can be used to support a distal lever 53 to which a distal end tool used for distribution line construction is attached, and a support 54 that supports the distal lever 53 and the like.

The jib 1 has a base-side arm member 2 horizontally attached to a base 52, and a tool-mounting arm member 4 supporting tools and the like, and the base-side arm member 2 and the tool-mounting arm member 4 are connected in an L-shape. . In this way, since the L-shape is formed, the tool attachment arm 4 can be arranged around the side surface of the bucket 51 on which the base 52 is not provided. Therefore, compared with the case where the arm member is linearly extended from the base 52, it is not necessary to traverse the bucket 51, and a wide work space can be ensured. The base-side arm member 2 and the tool attachment arm member 4 are connected by a movable connection portion 6 .

Furthermore, the jib 1 of the present invention is attached to the base 52, and since the weight can be managed independently of the maximum load capacity on the bucket 51 side, it has the following advantages.

In the distribution line construction shown in FIG. 1, depending on the work content, the weight of the electric wire 50 may be applied to the operator side via a tool. In this case, there is a possibility that the weight limit of the bucket 51 may be exceeded in the complicated operation that requires the use of a large number of heavy tools by two workers, thereby causing a safety problem. However, as the jib 1 of the present invention is not attached to the bucket 51 but is directly attached to the base 52 side, the weight limit on the bucket 51 side is slack, so that the operator can work safely.

FIG. 2 is an overall perspective view of the jib 1 of FIG. 1 . Here, the approximate shape of the bucket 51 is shown by a broken line so that the positional relationship with the bucket 51 can be easily grasped.

As described above, the linear base-side arm member 2 and the tool mounting arm member 4 are connected in an L-shape by the movable connecting portion 6 . The internal mechanism of the movable connection portion 6 will be described in detail later with reference to FIG. 3 , but the outline of the mechanism will be described here.

The movable connection portion 6 has a base-side storage portion 10 (first storage portion) that houses an end portion of the base-side arm member 2 and a pivot-side storage portion 12 (second storage portion) that houses the tool mounting arm member 4 ends. The base-side accommodating part 10 accommodates the edge part of the base-side arm member 2 from a horizontal direction. Moreover, the rotation side storage part 12 accommodates the edge part of the tool attachment arm member 4 from the direction orthogonal to the base side arm member 2.

In the jib 1 of the present embodiment, the movable connecting portion 6 is configured so that the angle of the tool mounting arm member 4 can be changed within a range of 10 degrees up and down with the horizontal as a reference.

On the rotating side receiving portion 12 , adjusting screws 18 are screwed up and down in such a manner that the heads of the adjusting screws 18 protrude. The angle can be adjusted within a range of ±10 degrees by operating the adjustment screws 18 arranged above.

As can be seen from FIG. 2 , the jib 1 is configured to be vertically symmetrical. Therefore, it can be used upside down. That is, when it is necessary to work on the side surface opposite to the bucket 51 (refer to FIG. 1 ), it can be removed from the base 52 and turned upside down to install. In the state of being turned upside down, the adjusting screw 18 which is changed to the top plays the role of adjusting the angle.

By the way, the material of the jib, which is usually used for distribution line construction, is mostly made of FRP material as the insulating material. Furthermore, since the FRP material is a resin material, there is a possibility of deflection against a high load.

In addition, as in the configuration of the present embodiment, if the side surface of the bucket 51 is detoured in an L shape and arranged to a position away from the base 52, even if the deflection of each part is extremely small, there is still a connection between the base 52 side and the tool mounting arm. The height difference becomes large due to the inclination between the front end sides of the material 4 or between the movable connection portion 6 and the front end side of the tool mounting arm material 4 .

However, in the jib 1 of the present invention, if the angle adjustment mechanism of the movable connecting portion 6 is used, and the tool mounting arm member 4 is slightly inclined upward at the angle of the estimated expected deflection amount, the tool mounting arm 4 will be placed in the state where the tool is installed. The work can be carried out in a substantially horizontal state. Hereinafter, the above-mentioned operation will be described using a schematic diagram.

FIG. 3 is a schematic diagram illustrating the deflection of the correcting tool mounting arm member 4 . FIG. 3( a ) shows a state of use without correction, FIG. 3( b ) shows a state of use with correction, and FIG. 3( c ) shows a state of use after correction.

As shown in FIG. 3( a ), when tools (the distal end lever 53 and the support 54 ) are placed on the tool attachment arm member 4 without any correction, the distal end side is deflected and inclined downward. In order to correct the inclination, the amount of deflection can be estimated, and the tool mounting arm 4 is installed in a state inclined upward in advance. Then, when tools (remote lever 53, support 54) are attached to the tool attachment arm 4 in the state shown in Fig. 3(b), the tools are arranged substantially horizontally as shown in Fig. 3(c).

Thereby, the distance between the jib 1 and the bucket 51, the distance between the jib 1 and the work object, and the distance between the operator and the work object can be kept constant. Therefore, even when the tool is moved along the jib 1, the work can be performed with the same posture, so that unnecessary work such as distance correction can be reduced, and the work load can be reduced.

In addition, there is an advantage that the weight of the tool to be operated can be intuitively grasped by confirming the adjustment amount of the adjustment screw 18 for tilt correction.

Next, the internal structure of the movable connection part 6 is demonstrated.

FIG. 4 is an enlarged perspective view showing the configuration of the periphery of the connecting region of the jib 1 of FIG. 1 by partially cutting it. Specifically, a part of the pivot-side housing portion 12 of the movable connecting portion 6 described above is cut away, and is displayed so that the internal structure can be easily confirmed.

字狀之2個構件彼此對向組合，形成可收納工具安裝臂材4的空間。藉由調節該2個構件之間隔，亦可收納粗細不同之工具安裝臂材4。 As shown in FIG. 4 , the rotation-side housing portion 12 is formed by making the cross-section

The two members in the shape of a letter are combined facing each other to form a space that can accommodate the tool mounting arm 4 . By adjusting the interval between the two components, tool mounting arms 4 with different thicknesses can also be accommodated.

The two rotating shafts 14 and the predetermined shaft 16 are arranged so as to penetrate through the rotating-side housing portion 12 . The rotation axis 14 is a central axis on which the tool mounting arm member 4 is rotated, and the predetermined axis 16 is a predetermined axis of rotation. The rotating shaft 14 and the predetermined shaft 16 thereof are arranged in parallel, and are erected in the base-side housing portion 10 of the movable connecting portion 6 in the horizontal direction (longitudinal direction). Here, around the predetermined shaft 16, a guide hole 12a, which is an arc-shaped long hole centered on the rotating shaft 14, is formed. Thereby, the rotation-side storage portion 12 is relatively rotatable relative to the base-side storage portion 10 on the vertical plane about the rotation shaft 14 .

In the configuration of the present embodiment, the length of the guide hole 12a is formed within a range of a swing angle of ±10 degrees based on the horizontal position where the rotation shaft 14 is arranged. Therefore, when the angle adjustment operation is performed, even if the adjusting screw 18 is loosened and the adjustment screw 18 is slack accidentally, the hand will stay at a maximum of 10 degrees from the horizontal position, thus preventing accidents such as falling of the tool.

As described with reference to FIG. 2 , it can be seen that the adjustment screws 18 are screwed to the rotating side storage portion 12 in a vertically opposed manner. As can be seen from FIG. 4 , the front ends of the adjustment screws 18 are oriented in a direction orthogonal to the predetermined axis 16 . Moreover, the screw support 20 is provided in the position which cross|intersects the front-end|tip of the adjustment screw 18, etc. on the predetermined axis|shaft 16. As shown in FIG. The upper and lower ends of the screw support 20 are formed with concave portions 20 a into which the front ends of the adjustment screws 18 can be inserted. The adjustment screw 18 can stably contact the predetermined shaft 16 via the screw support 20 . Since it is comprised in this way, in the range in which the guide hole 12a is formed, the rotation side accommodating part 12 can rotate to the angle which the screw support 20 abuts on the front end of the adjustment screw 18.

In addition, in this embodiment, the predetermined axis|shaft 16 is arrange|positioned with respect to the side which the tool attachment arm member 4 extends with respect to the rotation axis|shaft 14. Therefore, the upper end of the screw support 20 supports the weight of the tool attachment arm member 4 and the tool attached to the tool attachment arm member 4 via the upper adjustment screw 18 . That is, regarding angle adjustment, it is only the upper part of the two adjustment screws 18 provided on the upper and lower sides.

In the case of inverting use as described above, since it is exchanged, the adjustment screw 18 required for the operation is always located above where the operator can easily operate. If the lower adjusting screw 18 which is not related to the angle adjustment is retracted downward as shown in the figure, the tool mounting arm 4 can be lifted upward within the range of the guide hole 12a. Thereby, when changing the arrangement of the tool during operation, the burden on the internal mechanism is reduced, so that the life of the tool can be extended.

In addition, when the angle adjustment is required according to the position change of the tool, if the tool mounting arm 4 is slightly lifted, the reaction force from the screw support 20 is released, so that the upper adjustment can be easily rotated without using a tool Screw 18.

When the optimum angle for the operation is determined and the angle is to be fixed, the lower end of the screw support 20 is pressed against the lower adjusting screw 18, and the predetermined shaft 16 is clamped from above and below. For example, when the force from the vertical direction such as vibration due to the influence of wind is to be suppressed, since the tool mounting arm 4 can be stabilized, the lower adjusting screw 18 can also be effectively used in combination according to the situation.

Moreover, the spacer 22 is provided in the rotation side housing part 12 and the periphery of the rotation shaft 14 and the predetermined|prescribed shaft 16. As shown in FIG. The spacer 22 is used to define the interval between two members having a U-shaped cross section. In addition, the spacer 22 is formed with a guide groove 22 a that accommodates the two adjustment screws 18 and the predetermined shaft 16 . Therefore, the adjustment screw 18 can be stably advanced and retracted along the guide groove 22a. The guide groove 22a also functions as a guide for controlling the posture of the screw support 20 . This function is displayed in the following operation description.

FIG. 5 is a side view for explaining the operation viewed from the tool mounting arm 4 side. FIG. 5( a ) shows a state in which the tool mounting arm 4 (refer to FIG. 4 ) extends horizontally, and FIG. 5( b ) shows a state in which it is inclined upward. As shown in FIG. 5( b ), when the pivot side housing portion 12 of the movable connection portion 6 is inclined, the guide groove 22 a of the spacer 22 between the interiors is also inclined. Thereby, the side surface of the screw support 20 is pressed in the inclined direction by the inner wall of the guide groove 22a, and the screw support 20 is inclined in a following manner. In this way, by forming the guide groove 22a, even if the angle of the rotating side housing portion 12 is changed within the predetermined range in which the shaft 16 moves in the guide hole 12a, the concave portion 20a formed on the upper and lower ends of the screw support 20 is always adjusted in the direction Front end of screw 18.

(Second Embodiment) FIG. 6 is an overall perspective view showing the jib 30 according to the second embodiment of the present invention. In addition, FIG. 7 is a view showing the use state of the jib 30 of FIG. 6 . Among them, the same components as those shown in the first embodiment are indicated by the same reference numerals. An outline of the configuration will be described with reference to FIGS. 6 and 7 .

In contrast to the jib 1 of the first embodiment, which is formed in an L-shape, the jib 30 of the present embodiment is formed in an I-shape extending substantially linearly. Among them, the I-type refers to not being a straight line in the strict sense, but the longitudinal direction of the plurality of straight arms formed in the same direction. Therefore, there is also a configuration in which it does not extend completely on a straight line and is shifted at an intermediate position. Such a jib 30 is suitable for an aerial work vehicle (refer to FIG. 7 ) having a power part of a multi-joint mechanism (hereinafter referred to as a multi-joint mechanism part 56 ). Furthermore, in the present embodiment, an additional part selected according to the working environment may be used as the jib 30, and this additional part is connected to the multi-joint mechanism part 56 on the base 52 side.

In the base 52 using the multi-joint mechanism portion 56, it is possible to move in parallel up, down, left and right, to change the inclination angle, and to finely adjust it. In the aerial work vehicle having the bucket 51 having such a configuration, the jib 30 can be easily arranged on one side of the working side of the bucket 51 by operating the multi-joint mechanism 56 . As a result, even if the jib 30 is substantially linear, the tool mounting arm 34 can be arranged parallel to the side of the bucket 51 without crossing the working space of the bucket 51, as with the jib 1 of the first embodiment. . Since the base-side arm member 32 can be configured to be smaller than the L-shape, weight reduction can be achieved.

As shown in FIG. 6 , the jib 30 is not a simple linear shape. The jib 30 is provided with a connection portion 36 connected at an angle of 90 degrees between the base-side arm member 32 and the tool attachment arm member 34 . The base-side arm member 32 and the tool attachment arm member 34 are arranged in an offset manner via the connection portion 36 and are configured to be substantially linear. As will be described later, the base-side arm member 32 and the tool attachment arm member 34 are configured to be separable at the connection portion 36 .

7, the use state of the jib 30 will be described. The base 52 at the front end of the main arm 100 is provided with a multi-joint mechanism portion 56 . The multi-joint mechanism unit 56 can independently operate the bucket 51 and the jib 30 (see FIG. 6 ).

In the structure of this embodiment, the tool attachment arm member 34 is arrange|positioned so that it may be offset toward the bucket 51 side with respect to the base-side arm member 32 of the jib 30. Like the jib 1 of the first embodiment, the jib 30 of the present embodiment is also fixed to the base 52 side in a single-arm type. Therefore, the same as the configuration described using FIG. 3 , the point where the tip side of the tool mounting arm member 34 acts to incline downward is common.

However, in the configuration of the present embodiment, since the multi-joint mechanism portion 56 can be operated to raise the front end side, it is not necessary to use the movable connecting portion 6 as shown in FIG. 2 (see FIGS. 2 and 4 ). . Thereby, since the number of parts can be reduced, cost can be suppressed, and weight reduction can be achieved.

FIG. 8 is an enlarged view showing the connecting portion 36 of the jib 30 of FIG. 6 and its surroundings. FIG. 8( a ) shows the auxiliary arm 30 in the coupled state, and FIG. 8( b ) shows the auxiliary arm 30 in the separated state.

As shown in FIG. 8 , the connection portion 36 includes a base-side connection portion 38 provided at the end portion of the base-side arm member 32 and a tool-side connection portion 40 attached to the end portion of the tool-mounting arm member 34 . constituted.

As shown in the separated state of FIG. 8( b ), the tool-side connecting portion 40 has a through hole 40 a formed in a direction orthogonal to the longitudinal direction of the tool mounting arm member 34 . Moreover, the base-side connection part 38 has the insertion part 38a inserted in the through-hole 40a.

The insertion portion 38 a inserted into the through hole 40 a is fixed by the connecting nut 42 . In this way, the tool attachment arm member 34 can be easily separated by removing the coupling nut 42 from the insertion portion 38a integrally formed in the base-side arm member 32 . Therefore, even when the work is carried out in a wide range along the temporary electric wire, the tool mounting arm 34 having a different shape can be easily exchanged according to the change of the work environment.

In addition, when the size of the tool mounted on the tool mounting arm 34 is changed to a different size, and the space in front of the bucket 51 needs to be adjusted, even if only the operation of the multi-joint mechanism 56 (refer to FIG. 7 ) is used A situation that cannot be dealt with can be flexibly dealt with by attaching the insertion portion 38a of the base-side arm member 32 to the opposite side, and the degree of freedom of operation can be improved.

The above-described configuration is merely an example of the present invention, and the following modifications are also included.

In the above-described first embodiment, a configuration in which one predetermined shaft 16 is used for the movable connecting portion 6 is exemplified. However, it is also possible to arrange a plurality of predetermined shafts 16 at positions with different distances from the rotating shaft 14 . In the above configuration, the adjusting screws 18 can be used separately according to the distance from the fulcrum, that is, the rotation axis 14 . For example, on the side close to the rotating shaft 14, although the load capacity is small, the adjustment screw 18 can be operated with a small moving distance, so that the work time can be shortened and the handling can be easily handled. On the other hand, on the side away from the rotating shaft 14, since the load capacity is large, it is effective in the case of using a heavy tool.

Moreover, in the said 1st Embodiment, the structure in which the predetermined|prescribed shaft 16 was arrange|positioned at the front end side of the tool attachment arm member 4 rather than the rotation shaft 14 was shown. However, the rotation shaft 14 may be arranged on the front end side of the tool attachment arm member 4 rather than the predetermined shaft 16 . In this case, the one that supports the load of the tool mounting arm 4 and is related to the angle adjustment mechanism is the adjustment screw 18 on the lower side. It is effective in an operating environment where it is easy to operate from below.

In addition, in the said 1st Embodiment, the structure which arrange|positioned the rotating shaft 14 and the predetermined|prescribed shaft 16 so that it may be horizontally arranged was exemplified. However, the rotating shaft 14 and the predetermined shaft 16 may be arranged in a manner other than the horizontal direction. It is effective in a work environment in which the direction in which the adjustment screw 18 is screwed is restricted to other than the vertical direction.

In addition, in the said 1st Embodiment, the structure which arrange|positioned the adjustment screw 18 in the up-and-down opposite, and was symmetrical up and down was illustrated. However, the adjusting screw 18 can also be provided on either side, and the structure of turning over is not necessary.

Moreover, in the said 2nd Embodiment, the structure which provided the one connection part 36 between the base-side arm member 32 and the tool attachment arm member 34 was illustrated. In this example, it is comprised so that it can separate between the through-hole 40a formed in the tool attachment arm member 34 side, and the insertion part 38a provided in the base side arm member 32 side. However, the same through hole is formed on the base-side arm member 32 side, and the same insertion portion is provided on the tool attachment arm member 34 side. Moreover, it can also be comprised so that attachment and detachment may be carried out on both sides. Thereby, it becomes a spacer which can use an exchangeable member, which is a member extending in the direction orthogonal to both of the base-side arm member 32 and the tool-mounting arm member 34, and can further improve the degree of freedom of operation.

Moreover, in the said 2nd Embodiment, the tool attachment arm member 34 in which the through-hole 40a was formed was formed in I-shape, and the base-side arm member 32 provided with the insertion part 38a was formed in L-shape as an example. However, as long as the longitudinal directions of the base side and the tool attachment side are aligned in the same direction as a whole, it is also possible to configure the base side arm material to be I-shaped and the tool attachment arm material to be L-shaped in reverse. .

In addition, in the said 1st and 2nd embodiment, the structure which has the connection structure (movable connection part 6, connection part 36) including a right-angled part in at least one place was illustrated. Specifically, in the first embodiment, the movable connecting portion 6 includes a right-angled portion at one location, and the connecting portion 36 in the second embodiment includes a right-angled portion at two locations. If it is combined at a right angle in this way, it is easy to choose a configuration parallel to the edge of the bucket. (Industrial Availability)

The jib for an aerial work vehicle of the present invention can be extended to the side of a bucket or a work platform without a base, so it can be used for operations such as tunnel maintenance or bridge maintenance in addition to power distribution line fortifications .

1: Jib 2: Abutment side arm material 4: Tool mounting arm 6: Movable connection part 10: Abutment side storage part (first storage part) 12: Rotating side storage part (second storage part) 12a: Pilot hole 14: Rotation shaft 16: Specified axis 18: Adjusting screws 20: Screw support 20a: Recess 22: Spacer 22a: Guide groove 30: Jib 32: Abutment side arm 34: Tool mounting arm 36: Links 38: Abutment side connecting part 38a: Insertion 40: Tool side connecting part 40a: Through hole 42: connecting nut 50: wire 51: Bucket 52: Abutment 53: Remote lever (tool) 54: Support (tool) 56: Multi-joint Mechanism Department 100: main arm 101: Jib 102: Abutment 103: Bucket

FIG. 1 is a perspective view showing the use state of the jib according to the first embodiment of the present invention. FIG. 2 is an overall perspective view of the jib of FIG. 1 . FIGS. 3( a ) to ( c ) are schematic diagrams illustrating the deflection of the mounting arm of the correction tool. FIG. 4 is an enlarged perspective view of the periphery of the connecting region of the jib of FIG. 1 , partially cut away. FIGS. 5( a ) and ( b ) are side views for explaining the movement as viewed from the tool mounting arm side. 6 is an overall perspective view showing a jib according to a second embodiment of the present invention. FIG. 7 is a diagram showing the use state of the jib of FIG. 6 . FIG. 8 is a view showing the connecting part of the jib in FIG. 6 and its periphery, FIG. 8( a ) is an enlarged view showing a joint state of the jib, and FIG. 8( b ) is an enlarged view showing a separated state. FIG. 9 is a perspective view showing an arrangement state of a conventional jib.

1: Jib

2: Abutment side arm material

4: Tool mounting arm

6: Movable connection part

50: wire

51: Bucket

52: Abutment

53: Remote lever (tool)

54: Support (tool)

Claims (3)

A jib for an aerial work vehicle, which is a jib for an aerial work vehicle that is mounted on a base that supports a bucket for aerial work and supports a tool, characterized in that the jib for an aerial work vehicle is provided with: a base side arm material, which is substantially horizontal is mounted on the base; a tool mounting arm on which the tool is mounted; and at least one connecting portion that forms an angle of 90 degrees and can be connected between the base-side arm and the tool mounting arm; the above The connection part is a movable connection part, which can only rotate upward from a predetermined angle with respect to the axial direction and can adjust the angle, and connects the tool mounting arm to the base-side arm in a substantially L-shape. and the movable connecting portion includes: a first accommodating portion for accommodating the base-side arm member; a second accommodating portion for accommodating the tool mounting arm member; is erected on the ground and becomes the rotation center of the second storage portion; at least one predetermined axis penetrates the second storage portion and is erected on the first storage portion in parallel with the rotation axis to define the The rotation range of the second accommodating portion; and an adjustment screw, which is screwed at a position on the second accommodating portion where the front end can abut from a rotational direction orthogonal to the predetermined axis, and the above-mentioned first 2. Angle adjustment of the receiving part. The jib for an aerial work vehicle according to claim 1, wherein a screw support is provided at a position on a predetermined axis intersecting with the front end of the adjustment screw, and the adjustment screw is connected through a The said screw support is screwed on the said 2nd accommodating part so that it may mutually oppose mutually so that it can abut from two directions which are orthogonal to the said predetermined axis|shaft. The jib for an aerial work vehicle according to claim 1 or 2, wherein the predetermined angle is an angle within a range of 10 degrees up and down with the horizontal as a reference.

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