JPH0440514B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to electrical installation work, loading and transporting heavy objects such as utility poles, excavating a pit for constructing poles, constructing poles, and towing work using a loading winch. The present invention also relates to a work vehicle for use in various works using hydraulic tools for electrical installations using a loaded hydraulic power unit.

[Prior art]

Conventionally, in order to carry out the above-mentioned tasks, large and medium-sized vehicles have been equipped and operated exclusively for the purpose, but since the work needs to be completed in a short period of time, each vehicle has its own dedicated vehicle. There was waste and inconvenience, such as having to concentrate on waiting. In addition, it is difficult for large vehicles to enter and operate in cramped spaces, and in this case, it is necessary to rely on human power, and each task requires a long time and is highly dangerous.

[Purpose of the invention]

The present invention allows virtually all electrical installation work to be performed easily and quickly with a single machine, and can easily access overflow roads and farm roads, and can be used safely and easily on roads with heavy traffic. The purpose of the present invention is to provide a work vehicle for electrical installations that can quickly perform work.

Another object of the present invention is to provide a work vehicle for electrical installations that allows the above-mentioned operations to be performed by a small number of people and also saves labor.

[Structure of the invention]

The present invention provides a main leader disposed on a traveling vehicle such that it can be raised and lowered, a sub-leader movably connected to the main leader in a multi-stage telescoping type, and a sub-leader movable in the direction of extension and contraction of the main leader and the sub-leader. and a movable base for receiving a utility pole connected to the base, one end being fixed to the main leader and movable around the upper end of the sub-leader when the main leader is in an upright position, and the other end being connected to the movable base. a chain member having one end fixed to the main leader, and the other end connected to the movable base so as to be movable around the lower end of the sub-leader when the main leader is in an upright position; When the sub-leader moves with respect to the main leader, the moving base is movable in the same direction as the moving direction of the sub-leader.

〔Example〕

Hereinafter, the present invention will be specifically described based on embodiments shown in the accompanying drawings.

FIG. 1 is a front view showing an embodiment of the electrical installation work vehicle of the present invention, FIG. 2 is a plan view taken along the line - in FIG. 1, and FIG. 3 is a side view taken along the line -
FIG. 4 is a side view taken along the same line.

In the figure, 1 is a body frame of a working vehicle, 2 is a drive engine fixed to the center of the body frame 1, 3 is a dual hydraulic pump driven by the drive engine 2 and an endless belt 4, and 5 is a body frame 1 A hydraulic oil tank for a hydraulic pump 3 provided at the rear of the vehicle; 6 a pair of crawler tracks provided on both sides of the vehicle body frame 1; and 7 a drive sprocket on an output shaft fixed to both front sides of the vehicle body frame 1 by brackets 8. 10 is a driven sprocket that is built into the rear of the vehicle body frame 1 and inscribed in the crawler track 6; 11 is a driven sprocket that is installed below both sides of the vehicle body frame 1 and is located in the lower side of the crawler track 6 with the bearing portion as the axis. 12 is an operating valve block provided in front of the vehicle body frame 1 to control the operation of each hydraulic cylinder and each hydraulic motor, which will be described later; 13 is a driven wheel for use with various hydraulic tools provided in the vehicle body frame 1; The hydraulic converter to which this is connected, 14 is the vehicle body frame 1
A loading winch for towing and loading is provided on one side of the center part of the vehicle and is capable of rotating 180 degrees and locking 90 degrees. 15 is a leader receiving part provided near the front of the vehicle body frame 1, and 16 is installed upright at the front and rear of the upper part of the vehicle body frame 1. 17 is an outrigger/grounding hydraulic cylinder provided so as to be extendable on both rear sides of the vehicle body frame 1; 18 is a composite leader receiving bracket provided on both rear sides of the vehicle body frame 1; The hydraulic cylinder 2 for raising and lowering is connected to the fulcrum shaft 20 of this bracket 18.
This is a composite reader that is attached so that it can be raised and lowered freely by 1.

5 is a partially cutaway enlarged front view of the composite leader 19, FIG. 6 is a sectional view taken along the - line in FIG. 5, FIG. 7 is a sectional view taken along the same line, and FIG. 8 is a sectional view taken along the line -
FIG. Note that FIG. 6 corresponds to a lower base 61 seen from below when the movable base 32 is positioned at the uppermost end of the main reader 30, and FIG. 7 shows a view of this base 61 from above. is equivalent to

The composite reader 19 includes a main reader 30 and a sub-reader 3 that is attached to the main reader 30 so as to be able to move forward and backward.
1 and also incorporates a movable base 32 connected to the sub-leader 31 so as to be movable in the longitudinal direction thereof.

The main leader 30 serves as an outer frame 33 located at both ends of the composite leader 19 in the width direction, and is made by arranging a pair of main members 34 having concave cross sections parallel to each other with their concave portions facing each other. There is. Then, connecting members 35 are stretched over the backs of the upper and lower ends of these main members 34 to integrate the main members 34 together. Therefore, the main leader 30 has a flat concave space that is wide in width and short in the front and rear directions. Further, on the back of the main leader 30, there is a sub-leader cylinder receiving bracket 36 for pivotally mounting the base of a cylinder that moves the sub-reader 31 up and down.
A tilting fulcrum shaft bracket 37 and a tilting cylinder rod receiving bracket 38 are provided in order from the bottom. As shown in FIG. 7, the sub-leader cylinder receiving brackets 36 are a pair located approximately at the center of the connecting member 35 of the main leader 30. And the first
As shown in the drawings and FIG. 7, the lower end of the sub-leader hydraulic cylinder 42 is pivotally connected by pin connection. A leader leg 39 is connected to the lower end of the main leader 30 by a support shaft 41, and the leader leg 39 can be rotated in the vertical direction in FIG. Furthermore,
A sub-leader hydraulic cylinder 42 for moving the sub-leader 31 is provided on the back of the main leader 30 so that its axis is parallel to the axis of the main leader 30, and its base end is pivotally connected to the bracket 36. .

The sub-leader 31 is installed in a space defined by each main member 34 of the main leader 30 so as to be vertically movable in FIG. As shown in FIGS. 6 to 8, the sub-leader 31 has a pair of frames 31a each having a concave cross-sectional shape, which are arranged parallel to each other in the width direction. Two guide wheels 43 are rotatably provided on the lower end sides of these frames 31a, and these guide wheels 43 are connected to the main leader 30.
It is made possible to roll against the inner wall of the main material 34. Further, as shown in FIG. 6, a guide metal 44 is provided on the upper end side of the main member 34 to slidably guide the outer surface of the frame 31a. Therefore, the sub-leader 31 has a guide wheel 43 and a guide metal 44.
It is connected to the main reader 30 at two points.

Further, as shown in FIG. 5, the sub-leader 31 is connected to a sub-leader hydraulic cylinder 42 by a bracket 45 provided on its back. When this secondary leader hydraulic cylinder 42 is operated, the sliding structure between the guide wheel 43 and the guide metal 44 causes the secondary leader 31 to move along the dashed-dotted line in FIG. 1 with respect to the main leader 30. It is possible to move up to the position shown by or to move down from this position to fit inside the main leader 30.

Furthermore, a movable base 32 is connected to the sub-reader 31 so as to be movable up and down in FIG. For this connection, as shown in FIG.
A wheel 32a is provided on the back side of the sub-leader 31, and the wheel 32a is incorporated in the sub-leader 31 so that it can roll freely by utilizing the concave cross section of the frame 31a.

The movable base 32 is a box-shaped structure that includes two bases 60 and 61 each having a concave portion large enough to wrap around a utility pole, and that both ends of the bases 60 and 61 in the width direction are integrally connected by an outer frame 62. It is something. A pair of brackets 64 are provided at both ends of the back in the width direction, as shown in FIG. 5, and a shaft 63 is attached to each of these brackets 64, respectively. These shafts 63 enter into the frame 31a of the sub-leader 31, and a wheel 32a provided with the shafts 63 rotatably can roll while contacting the inner wall of the frame 31. In addition, in the concave portion of the base 61 on the lower side of the movable base 32, two utility pole receiving rollers 65 are installed in a V-shape.
are provided so that the utility poles to be loaded are received by these rollers 62. Incidentally, as shown in FIG. 5, the movable base 32 has an attachment hole 90 through which a wire rope or the like can be passed, and this hole is used for various operations.

Furthermore, sprockets 46 and 47 are attached to brackets 48 and 47 at the upper and lower ends of the sub-leader 31, respectively.
Attach by 49. These sprockets 46 and 47 are arranged two each at two locations in the width direction when viewed from the front (as viewed from the right side in FIG. 5).

Chain fixing parts 6 are attached to the upper end of the main leader 30 and the upper bracket 64 of the movable base 32, respectively.
6 and 67 are provided, and these fixed parts 66 and 67 are connected by a chain 69a, and this chain 69a is connected to the sprocket 46 at the upper end of the sub-leader 31.
Wrap it around. Further, chain fixing parts 68 and 69 are also provided at a lower position than the lower bracket 64 of the moving base 32 and the upper end of the main leader 30, respectively, and these fixing parts 68 and 69 are connected to the chain 69b.
At the same time, this chain 69b is wound around the sprocket 47 at the lower end of the sub-leader 31.
In this embodiment, the chains 69a and 69b are provided as chain members, but in the work described later, it is also possible to raise and lower the movable base 32 simultaneously when the sub-leader 31 is raised and lowered using only one chain 69a. .

With the above-mentioned connection structure between the main reader 30 and the sub-leader 31, when the sub-leader hydraulic cylinder 42 is operated, the sub-leader 31 rises to the height shown by the dashed line in FIG. At this time, moving base 3
2 is integrated with the sub-leader 31, so this movable base 32 also rises by an amount equal to the rising height of the sub-leader 31. As the sub-leader 31 rises, the sprockets 46, 4
7 also rises, and since the chain fixing parts 66 and 69 are at the rest position, the chains 69a and 69
b also runs, rotating both sprockets 46 and 47 counterclockwise in FIG. Therefore, the movable base 32 moves from the lowest position in FIG. 5 to the highest position shown by the dashed line in FIG. That is, in addition to the rise of the sub-leader 31, the movable base 32 rises with respect to the sub-leader 31, making it possible to obtain a stroke of the movable base 32 that is longer than the stroke of the sub-cylinder hydraulic cylinder 42.

FIG. 9 is an enlarged side view of the proximal end of the main leader 30;
Figure 10 is a sectional view taken along the - line in Figure 9;
FIG. 1 is a sectional view taken along the - line in FIG. 10.

A support shaft 4 is provided at the lower end of the main leader 39 in the width direction.
1 is rotatably incorporated, and leader legs 39 are attached to both ends of the support shaft 41 so as to be rotatable from a grounding position to a position along the side surface of the main leader 30. Further, in a portion surrounded by the leader legs 30, a roller plate 40 having rollers 54 for receiving the utility pole A in the same manner as the rollers 65 of the movable base 32 is provided. This roller plate 40 can be rotated counterclockwise within a range of 180 degrees from the state shown in FIG.
Then, as shown in FIG.
0 is provided with notches 40a at two locations in the width direction, and a pin 53 that fits into the notches 40a is inserted into the main leader 3.
Fix it to the lower end of 0. When the roller 54 is in the position to receive the utility pole A as shown in FIG.
restrain the posture of Further, a pin 52 is provided on the back side of the support shaft 41 so as to penetrate from the bottom to the top of the notch 40a, and when the roller plate 40 is not in use, it can be reversed counterclockwise as shown in Fig. 11. The pin 52 is made to pass through the notch 40a. By connecting a fixture 52a to the upper end of this pin 52 by screwing or the like, the roller plate 40 can be locked in the retracted position.

Further, when the roller plate 40 is in the posture shown in FIG. 10, the leader leg 39 is restrained in the grounding posture shown in FIG. When the roller plate 40 is reversed to the retracted position, the standing position along the side surface of the main leader 30 is made to have a locked configuration.

Various operations performed by the electrical installation vehicle having the above configuration will be explained with reference to the drawings from FIG. 12 onwards.

FIGS. 12 and 13 show an example of excavating a vertical hole for erecting a utility pole, and are a side view and a front view before the earth auger device starts excavating the vertical hole.

In the figure, a driving device 80 for excavation is attached to a movable base 32 of the electrical work vehicle of the present invention, and an earth auger 82 is connected via an intermediate shaft 81 of this driving device 80.

When excavating, first, the vehicle body frame 1 is stopped at the planned excavation position of the pit, and the composite leader 19 is set in an upright position. Then, the outrigger/grounding hydraulic cylinder 17 makes contact with the ground, and the leader leg 39 also makes contact with the ground. Next, the movable base 32 is lowered to the lower end of the composite leader 19 and the drive device 80 is fixed to the movable base 32 as an attachment type, and a hydraulic hose ( (not shown). After the sub-leader 31 is raised by the sub-leader hydraulic cylinder 42 and the height of the movable base 32 is set, the intermediate shaft 81 is connected to the drive device 80, and further the movable base 32 is moved as shown in the figure.
Raise the earth auger 82 to the highest position.
is connected to this intermediate shaft 81.

After such preparation, while the earth auger 82 is rotated by the drive device 80, the actuator of the sub-leader hydraulic cylinder 42 is moved backward to lower the movable base 32 and the sub-leader 31. As a result, the earth auger 82 rotates and descends, making it possible to excavate a vertical hole for erecting a pillar. Here, when the earth auger 82 is lowered, the movable base 32 needs to provide the force to insert it into the soil. This force is obtained by the wire 96b running in the direction of pulling down the movable base 32 when the sub-leader hydraulic cylinder 42 contracts. That is, wire 69b
moves from the state shown in FIG. 12 to the state shown in FIG. 1, so that the moving base 32 is pulled downward.
By using this, earth auger 82
enables excavation by

After the excavation of the pit for the pole is completed, the utility pole A is transported to the pit position. This transportation work of utility pole A is also performed by the electric installation work vehicle of the present invention,
First, start by loading utility pole A.

FIGS. 14 to 21 show the procedure for loading utility pole A onto an electrical installation work vehicle. Note that utility pole A is shown as an example of a combination of concrete pole A-1, intermediate steel pipe A-2, and upper steel pipe A-3.

First, before loading utility poles, align and stop the vehicle body frame 1 with the intermediate steel pipe A-2 and upper steel pipe A-3 placed on the ground, and install two side loading auxiliary brackets on each of the left and right sides. Attach 70. As shown in FIG. 15, this side auxiliary bracket 70 is used with its lower end grounded and its upper end fixed to the vehicle body frame 1. It is provided with a freely movable insertion rod 70a. The insertion rod 70a is inserted into the holding hole of the side loading utility pole receiving part 16 of the support 16a shown in FIG. 1, and is fixed to the vehicle body frame 1 in an oblique position as shown in FIG.

Next, the wire 72 from the winch 14 is wound around the outer peripheral surface of the intermediate steel pipe A-2 on the ground. Then, when the winch 14 is driven to wind up the wire 72, the intermediate steel pipe A-2 rides on the side support fitting 70, and finally, as shown by the dashed line in FIG. 14, the intermediate steel pipe A-2 is used for side loading. It fits inside the utility pole receiving part 16. In addition, upper steel pipe A-3
By the same operation, it can be placed on the other side side loading utility pole receiving part 16 as shown in FIG. 14.

To load concrete column A-1, the 16th
As shown in the figure, the composite leader 19 is placed in an upright position, and a supporting metal fitting 73 shown in FIG. 17 is prepared as an auxiliary member. This support fitting 73 has two free-standing legs, and the upper ends of these legs are tied together by a chain 73a.

As shown in Fig. 16, the movable base 32 is set at the lower end of the concrete pillar A-1 placed on the ground.
Connect wire B to and hang this wire B around concrete column A-1. Then, when the sub-leader hydraulic cylinder 42 is actuated to raise the sub-leader 31 and the moving base 32, the concrete column A-1 leaves the ground as shown by the dashed line in the same figure, and at this time, the concrete column A-1 separates from the vehicle body frame 1. A supporting metal fitting 72 is placed under the concrete pillar A-1 at an appropriate distance, and is supported by a chain 73a.

After the concrete column A-1 is supported by the support fittings 73, the composite leader 19 is laid down on the vehicle body frame 1 by the raising/lowering hydraulic cylinder 21 as shown in FIG. During this work, the roller plate 40 at the lower end of the composite leader 19 is locked in a position protruding in front of the main leader 30 as shown in FIGS. Set the position so that it follows the direction.
After this setting, when you defeat composite leader 19,
The leading end of the concrete pillar A-1 gradually comes to rest on the roller plate 40, and is supported by two receiving rollers 54 provided on the roller plate 40. At the same time, the mobile base 3
The concrete column A-1 is also supported by the second roller 65.

After placing one end of the concrete column A-1 on the lower end of the composite leader 19 in this way, the hanging bracket 75
is hung on the lower end of concrete column A-1 as shown in Fig. 19. Then, the wire 76 of the loading winch 14 is hung on a pulley 77 attached to the moving base 32, and a hook 78 is provided at the tip of the wire 76.
8 and the double wire 79 attached to the hanging metal fitting 75 side. When the loading winch 14 is activated to wind up the wire 79, the concrete pillar A-
1 gradually advances toward the front of the vehicle body frame 1 by the rolling of the receiving roller 54 of the roller plate 40, as shown in FIG. After the center of gravity of the concrete column A-1 shifts to the receiving roller 54 side due to such movement of the concrete column A-1, the support fitting 73 is removed.

After this, the loading winch 14 continues to operate, and the concrete column A-1 is sent to the upper end side of the composite leader 19. Simultaneously with the loading by the loading winch 14, the moving base 32 is moved to completely load the concrete column A-1 as shown in FIG. 19. That is, concrete column A-1
After the tip of the is placed on the movable base 32,
When the sub-leader hydraulic cylinder 42 is operated, the sub-leader 31 moves to the right in FIG. 19, and at the same time the moving base 32 also moves in the direction of loading the concrete column A-1. Therefore, in the end, the first
As shown in FIG. 9, the sub-leader 31 advances to the fully extended position, and the concrete column A-1 is loaded onto the composite leader 19 as shown in FIG. 20.

Note that FIG. 21 is a diagram showing an example in which the utility pole A can be placed on the leader leg 39 and transported. This is done by hanging the wire B from the moving base 32 on the utility pole A, and using the sub-leader hydraulic cylinder 42 to connect the wire B.
This is a pole in which the utility pole A is placed on the leader leg 39 using the tension. In this case, it goes without saying that the utility pole A is oriented perpendicular to the plane of the paper.

In this way, concrete column A-1, intermediate steel pipe A
-2 and the upper steel pipe A-3 can be transported to the pole erection site while being placed on an electrical work vehicle as shown in Fig. 20. Note that since the concrete column A-1 is supported by the composite leader 19, it can be inserted into the pit immediately. Therefore, at the site, intermediate steel pipe A
-2 and the upper steel pipe A-3 are lowered to the ground, and the concrete column A-1 may remain placed on the composite leader 19.

At the pole erection site, the pole erection work shown in FIGS. 22 to 25 is performed, and in FIG. 22, the pole erection work of one concrete utility pole A placed on the composite leader 19 will be explained.

In FIG. 22, the utility pole A indicated by the dashed line is placed on the composite leader 19 and transported to the pit position,
The vehicle body frame 1 is positioned and stabilized by the outrigger/grounding hydraulic cylinder 17. Then, a stabilizing auxiliary leg 85 shown in FIG. 24 is connected to the front end of the vehicle body frame 1 to widen the base of the vehicle body frame 1 when the pillar is erected. The stabilizing auxiliary leg 85 has an insertion end 85a inserted into an insertion hole (not shown) in the vehicle body frame 1 at one end, and a wheel 85b at the other end.

Before the pole erection work, a safety belt C is hung so as to hold the utility pole A between the movable base 32 and the movable base 32 in order to prevent the utility pole A from slipping out from the movable base 32 when the composite leader 19 is erected. Then, the utility pole A is moved above the composite leader 19 so that the lower end of the utility pole A is aligned with the lower end of the composite leader 19.
Note that such work can be performed by operating the sub-leader hydraulic cylinder 42 or by hooking the wire of the loading winch 14 to the base end of the utility pole A and hoisting it up.

Next, the wire rope 86 for pole erection is hung on the attachment hole 90 made in the movable base 32, and the hanging metal fitting 75 provided so as to hold the lower end of the utility pole A is hung.
is connected to this wire rope 86 for pole erection. After this work, the composite leader 19 is gradually raised by the raising/lowering hydraulic cylinder 21, and when it stands upright, it is stopped. Then, lock the leader leg 39 in the grounding position as shown,
Check the consistency of utility pole A with the pit and move on to burying work. This burying work is performed while lowering both the sub-leader 31 and the movable base 32 by retracting the actuator of the sub-leader hydraulic cylinder 42.

Through such work, the lower end of the utility pole A is gradually lowered into the pit, and when the set depth is reached, the wire rope 86 for pole erection is removed from the hanging fitting 75. Note that this hanging metal fitting 75 is left buried in the pit along with the utility pole A.

On the other hand, concrete column A-1, intermediate steel pipe A-2
In the case of erecting an urban composite column that combines upper and upper steel pipes A-3, if there is sufficient space at the location where the pillar is erected, these pillars A-1, steel pipes A-2, and A-3 should be connected in advance on the ground. and make it one genuine item. After this, attach this one real utility pole to the composite leader 1 in the same manner as above.
9 and bury the lower end of the pole in the pit by the pole erection work explained in FIG. 22.

In addition, when constructing an urban composite column when the place for the column erection work is narrow, it is carried out in the manner shown in FIGS. 23 to 27.

First, concrete column A- which will be the base after erection of the column.
One pillar is erected in exactly the same manner as explained in Fig. 22. After temporarily burying the concrete column A-1 in the pit, the vehicle body frame 1 is moved a little in the direction away from the concrete column A-1 as shown in FIG. Transfer the steel pipe A-2 onto the composite leader 19.
Then, as in the case of the concrete column A-1, the intermediate steel pipe A-2 is raised near the temporarily installed concrete column A-1 by the operation of the raising/lowering hydraulic cylinder 21 and the sub-leader hydraulic cylinder 42. After this, in order to maintain the posture of intermediate steel pipe A-2,
It is tied to the fixed concrete column A-1 with a wire 96 and integrated.

Next, an auxiliary pillar erecting bracket 92 shown in FIGS. 26 and 27 is fixed to the upper end of the movable base 32, and furthermore, this bracket 92 is used to connect an auxiliary pillar erecting pillar 93. This work is carried out on mobile base 3.
2 is set to be the lowest level, an upper end auxiliary bracket 93a is provided at the upper end of the auxiliary pillar 93, and a lifting pulley 95 is attached to this.
Attach. Then, the wire 95a wound around the pulley 95 is connected to the winch 14, and the holding wire D for holding the upper steel pipe A-3 by wrapping it around the outer circumference of the middle part of the upper steel pipe A-3 is connected to the wire 95.
It is integrated into the tip of a.

As shown in FIG. 27, the auxiliary pole erection bracket 92 has bifurcated arms 92a that protrude to hold the intermediate steel pipe A-2.
A safety belt 92b for holding the intermediate steel pipe A-2 is provided at the tip of the pipe 2a. Further, the upper end auxiliary bracket 93a is also provided with a bifurcated arm for receiving the upper steel pipe A-2, and a safety belt 93b is attached to the tip of this arm, similarly to the auxiliary bracket for pole erection 92.

After connecting the auxiliary pillars 93 and the like, the movable base 32 is raised to its uppermost position by the sub-leader hydraulic cylinder 42, and the pulley 95 of the auxiliary pillar 93 is used to raise the movable base 32 to the uppermost position. The upper steel pipe A-3 placed on the receiving part 16 is lifted up. In this lifting operation, the holding wire D is hung on the scaffolding bolt A-4 provided on the outer circumferential surface of the upper steel pipe A-3, and the bolt A-4 is pulled up to raise the upper steel pipe A-3.
Try to lift 3. And the intermediate steel pipe A- is restrained by the concrete column A-1.
The lower end of the upper steel pipe A-3 is fitted to the upper end of the upper steel pipe A-3, and these steel pipes A-2 and A-3 are made into one piece.

Next, lower the movable base 32 to the lowest end, and attach the lower end of the intermediate steel pipe A-2 to the auxiliary pole erection bracket 92.
At the same time, it is restrained with the safety belt 92b. In addition, the lower end of the upper steel pipe A-3 is also placed in the recess of the bracket 93a at the upper end of the auxiliary pillar 93, and at the same time is held by the safety belt 93b.
Furthermore, the holding wire D is hung on the scaffolding bolt A-4 at the lower end side of the upper steel pipe A-3.

Then, the wire 96 is cut to release the intermediate steel pipe A-2 from the concrete pillar A-1, and the movable base 32 is raised to its highest position.
Thereafter, the actuator of the raising/lowering hydraulic cylinder 21 is moved back a little, and the upper end of the composite leader 19 is tilted to the right by 2 to 3 degrees from the vertical line in FIG. 25.
That is, the installation by the outrigger/grounding cylinder 17 is released so that the grounding portion is slightly lifted, and the vehicle body frame 1 is made movable. and,
The lower end of intermediate steel pipe A-2 is the base concrete column A-
Make sure it is at a higher level than the top of 1.
After the vehicle body frame 1 is quietly advanced to a position where these can be fitted, it is stopped.

Next, after returning the composite leader 19 to the vertical position, the movable base 32 is gently lowered, and the intermediate steel pipe A-2 is connected to the concrete column A-1 while adjusting the position thereof. Then, each bell and wire rope are uncoupled, the movable base 32 is lowered, and the composite leader 19 is attached to the vehicle body frame 1.
By tilting it upward and removing the auxiliary pole 93 and bracket 92, installation of the utility pole is completed.

〔Effect of the invention〕

According to the present invention, the following effects can be achieved.

A single work vehicle can carry out all operations from digging a pit for pole construction to loading and transporting utility poles and erecting the poles, making it easy to perform construction on site.

Since it does not require auxiliary machinery such as a crane, it can be constructed in a short time without complicating the work even in narrow pole erection sites.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the electrical installation work vehicle of the present invention, FIG. 2 is a plan view taken in the direction of the - arrow in FIG. 1, and FIG. 3 is a front view taken in the direction of the - arrow in FIG. Figure 4 is a rear view taken along the - line arrow in Figure 1, Figure 5 is a partially cutaway side view showing the main parts of a composite leader for an electrical work vehicle, and Figure 6 is a - line in Figure 5. 7 is a sectional view taken along the - line in FIG. 5, FIG. 8 is a sectional view taken along the - line arrow in FIG. 5, and FIG. 9 is an enlarged side view of the lower end of the main leader.
10 is a cross-sectional view of the lower end of the main leader taken along the - line in FIG. 9, FIG. 11 is a longitudinal sectional view of the lower end of the main leader taken along the - line in FIG. 10, and FIGS. Fig. 14 is a rear view showing side loading of steel pipe columns, Fig. 15 is a front view of auxiliary fittings used for side loading, and Fig. 16 is concrete. Figure 17 is a side view showing the initial stage of pole loading work; Figure 17 is a front view of the support metal used to load utility poles onto the composite leader; Figure 18 is a side view showing the loading of concrete poles onto the composite leader; Figure 19 is a side view showing when concrete columns are fully loaded, Figure 20 is a side view when concrete columns and steel pipe columns are loaded, Figure 21
The figure is a side view showing an example of using the leader leg for transporting utility poles, Figure 22 is a side view showing the construction of a real utility pole, Figure 23 is its front view, and Figure 24 is a diagram showing the construction of a real utility pole. Figure 25 is a side view of the stabilizing auxiliary legs to be used;
The figure is a side view of the bracket used for the pole erection work shown in Fig. 25, and Fig. 27 is its plan view. 1: Vehicle body frame (driving vehicle), 19: Composite leader, 2
1: Hydraulic cylinder for raising and lowering, 30: Main leader, 3
1: Sub-leader, 42: Hydraulic cylinder for sub-leader.

Claims (1)

[Scope of Claims] 1. A main leader disposed on a traveling vehicle so as to be able to rise and fall, a sub-leader movably connected to the main leader in a multi-stage telescoping type, and movable in the direction of expansion and contraction of the main leader and the sub-leader. a movable base for receiving a utility pole connected to the secondary leader, one end of which is fixed to the main leader, and when the main leader is in an upright position, the other end is movable while movable around the upper end of the secondary leader; A chain member connected to a base is provided, one end of which is fixed to the main leader, and the other end of which is connected to the movable base so as to be movable around the lower end of the sub-leader when the main leader is in an upright position. An electrical installation work vehicle, wherein when the sub-leader moves relative to the main leader, the movable base is movable in the same direction as the moving direction of the sub-leader.