JP2528264Y2 - Work vehicle with rotating boom head - Google Patents

Description

[Detailed description of the invention] a. Purpose of the invention (industrial application field) The present invention relates to a working vehicle having a working device attached to the tip of a boom that can be raised and lowered, expanded and contracted, and the like.

(Prior Art) As such a working vehicle, for example, there is a temporary supporting construction vehicle provided with a temporary supporting arm for temporarily supporting an electric wire at an end (boom head) of a boom. This temporary support construction vehicle is used for rebuilding electric poles, replacing arm braces for supporting electric wires on electric poles, etc. Do.

As a conventional temporary support construction vehicle, for example, there is one disclosed in Japanese Utility Model Laid-Open Publication No. 1-129197. This temporary support construction vehicle is provided with a boom head that can freely rotate, undulate, and expand and contract. The rotating arm is movably attached, and a flexible arm that can be extended and contracted is attached to the tip of the rotating arm, and a temporary support arm is attached to the tip of the bending / extending arm.

(Problem to be Solved by the Invention) When the operation is performed using the work vehicle (temporary support construction vehicle) configured as described above, the rotation of the rotation arm and the bending and extension arm The bending / extension control is performed to hold the temporary supporting arm vertically upright, but there is a problem that the working device becomes large due to the provision of the rotating arm. When the size of the working device is increased, not only is the problem that the manufacturing cost and weight increase, but also there is a problem that it is difficult to temporarily insert the working device between the wires when temporarily supporting the wires.

Further, not only a temporary supporting work device but also a digging work device, a crane device, or the like may be attached to the end of the boom. In such a case, it is required that the working device for temporary support be detachable from the boom head. However, it is difficult to adopt a detachable structure in the case of a large-sized working device as in the related art. There is a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a work vehicle having a configuration capable of reducing the size and weight of a work device attached to the end of a boom.

B. Configuration of the Invention (Means for Solving the Problems) In order to achieve such an object, the work vehicle of the present invention includes a boom that can be raised and lowered, expanded and contracted, and the like, and a boom head provided at the tip of the boom. The boom head is composed of a working device attached to the boom head. The boom head is fixed to the tip of the boom, and is pivotally connected to the fixed portion to rotate about an axis perpendicular to the direction of extension of the boom. It comprises a rotatable rotating part and a rotating cylinder for rotating the rotating part with respect to the fixed part. Further, a holding member capable of holding the working device is provided on the base end side member of the boom, and an engaging member capable of engaging with the working device is provided on the rotating portion, and the working device is held in a reduced state of the boom. The working device can be attached to the base member by the holding member or attached to the rotating unit by the engaging member. It is configured to be able to.

(Operation) In the case of a working vehicle having such a configuration, when the working device is not used, the working device can be held on the boom base side member by the holding member while the boom is reduced. The working device does not become an obstacle even when the telescopic operation is performed. For this reason, when the wire is wrapped around the sheave at the tip of the boom to perform the suspending operation, or when the auger device is attached to the end of the boom to perform the digging operation, the working device (for example, the temporary support device) is used. ) Does not get in the way.

Also, when using the working device, the holding by the holding member is released while the boom is reduced, and the working device may be engaged with the boom head by the engaging member,
Thereby, the working device moves with the boom head according to the extension and contraction of the boom. In this case, the working device is attached to the rotating unit, and if the rotating unit is rotated by the rotating cylinder, the working device can be rotated together with the rotating unit, thereby improving workability. In addition, since the working device is directly attached to the rotating member constituting the boom head, the working device can be reduced in size and weight without the need for a conventional rotating arm.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

As an example of a working vehicle to which the present invention is applied, FIG. 1 shows a temporary supporting construction vehicle equipped with a digging column device, which will be described.

Outriggers 3 are provided at four front, rear, left, and right sides of the vehicle body 2 of the temporary support construction vehicle 1 (however, only two outriggers disposed on the left side of the vehicle body 2 are shown in the drawing). When performing work, the outriggers 3 should be
Extend laterally and downwardly to support the vehicle body. A swivel 4 is attached to the front of the vehicle body 2 so as to be rotatable with respect to the vehicle body 2. Furthermore, on the upper part of the swivel 4,
The base end of the main boom 5 is pivotally mounted. The main boom 5 is configured in a three-stage telescopic form with a base end boom 5a, an intermediate boom 5b and a distal end boom 5c. It is free.

The boom head 7, which constitutes the tip of the tip boom 5c,
It is composed of a fixed member 7a and a rotating member 7b. Rotating member 7b
As shown in FIG. 4, the rotary cylinder 34 attached to the inside of the distal end boom 5c can expand and contract to rotate about a rotary shaft 7c with respect to a fixed member 7a fixed to the distal end boom 5c.

A crane winch 8 is attached to the base end of the base end boom 5a. A wire 8a fed or wound by the winch 8 is hung around a boom head 7, and a hook 9 is hung on the end of the wire 8a. I have.

An auger device (digging device) 11 is attached to the tip boom 5c via an auger mounting member 10. The auger device 11 includes an order motor 11a and an auger drill 11b. The auger device 11 can be fixed to the base boom 5a side by the auger mounting member 10,
It can also be fixed to the 5c side. In the drawing, the auger drill 11b winds a storing wire (not shown) stretched between itself and the base end boom 5a so that the entire auger device 11 is pulled up in parallel with the main boom 5. And stored.

A temporary support device 12 is mounted on the upper part of the main boom 5. The temporary support device 12 includes an arm support 13, a bending and stretching arm 14, and a arm device 17. The base end of the bending / extension arm 14 is pivotally attached to the arm support 13.
The bending / extension arm 14 is configured in a three-stage telescopic manner by a base bending / extending arm 14a, an intermediate bending / extending arm 14b, and a distal bending / extending arm 14c. By the operation, the bending and extension operation with respect to the main boom 5 can be freely performed. Note that the proximal bending arm 14a and the bending cylinder 15 are connected to the proximal bending arm 14a.
Are connected via a bending / extending cylinder connecting member 16 attached to the lower surface of the.

A temporary support arm device 17 is attached to the intermediate bending / extending arm 14b. The arm 18a and the holding member 1 are attached to the arm device 17 so as to support live wires (electric wires in an energized state).
A plurality of hot wire holders 18 composed of 8b are attached.
Although the figure shows a state where the arm device 17 is stored downward, when the arm device 17 is used, the arm device is rotated by an operation of a cylinder for rotating the arm device (not shown) or the like. The device 17 is rotated with respect to the bending / extending arm 14 so as to be positioned in an appropriate direction. Also, at the tip of the tip bending and stretching arm 14c,
A holding member 19 for supporting the ground wire is attached. Further, a winch 20 for lifting equipment and the like is attached to the intermediate bending and stretching arm 14b.

The temporary support device 12, as described below,
It can be fixed to the 5a side or to the boom head 7 side.

As shown in FIG. 2, a first arm holding member 31 and a second arm holding member 32 are mounted on the upper surface of the base end boom 5a. These arm holding members 31, 32 are connected to the bending / extending cylinder connecting member 16 attached to the base bending / extending arm 14a.
And the held member 33 are received. As shown in FIG. 3, lock holes 16a are formed in both side surfaces of the bending / extending cylinder connecting member 16. Further, the first arm holding member 31 is provided with two locking cylinders 34 so as to face the lock holes 16a. In addition,
The second arm holding member 32 and the held member 33 are also provided with a pair of locking cylinders and lock holes.

When the temporary support device 12 is fixed to the base end boom 5a side, the locking cylinder 34 is extended to fit the rod 34a into the lock hole 16a, and the first and second arm holding members 31, 32 are provided.
Then, the bending / extending cylinder connecting member 16 and the held member 33 are locked and held. 4 and 5, the slide part 35 provided at the lower part of the arm support base 13 is fixed to the boom head 7 side.
Slide into the rail member 36 provided on the upper part, and at a predetermined position, the lock pin 37 attached in the arm support 13 and the rotating member 7b are locked, the locking cylinder 34 is shortened, and the temporary support device 12 is separated from the base end boom 5a.

Next, the operation using the temporary supporting construction vehicle 1 will be described.

First, a description will be given of the work of excavating a hole for installing a utility pole using the auger device 11 (see A in FIG. 6). First, the auger mounting member 10 is fixed to the end boom 5c side. Thus, the auger device 11 moves together with the tip of the main boom 5 (tip boom 5c) by the extension operation of the main boom 5. At this time, the temporary support device 12 is fixed to the base end boom 5a side. Next, the auger drill 1 is rotated by rotating the auger motor 11a in the opposite direction to the storage.
The auger device 11 is suspended vertically from the end of the main boom 5 while the storage wire is unwound from 1b. In this state, the main boom 5 is extended until the auger device 11 is positioned on the target position of excavation, and then the main boom 5 is raised and lowered while rotating the auger motor 11a in the excavation direction, thereby making the above-mentioned hole for digging. Is excavated.

Next, the work of installing a utility pole will be described (see B in FIG. 6). When installing a utility pole in the excavated hole, first, the auger device 11 and the temporary support device 12
To the base end boom 5c side. As a result, the main boom 5 can be independently extended and retracted. Main boom 5
Is inserted into the above-mentioned hole while appropriately raising and lowering, expanding and contracting, or moving a utility pole (not shown) suspended from the hook 9 up and down by the crane winch 8.

Next, a description will be given of a case where a temporary supporting method for supporting a live wire is performed instead of a utility pole (see C in FIG. 6). In this case, while the auger device 11 is fixed to the base end boom 5a side,
The temporary support device 12 is fixed to the boom head 7 side. As a result, the temporary support device 12 moves as the main boom 5 expands and contracts. Next, the boom head 7 is extended by extending the rotary cylinder.
The rotation member 7b is rotated, and the bending / extension cylinder 15 is extended so as to raise the bending / extending arm 14 with respect to the main boom 5. Thus, the bending and stretching arm 14 can be set up vertically. Further, the arm device 17 is set horizontally. In this state, the electric wire removed from the telephone pole is
Attach and support on top.

C. Effect of the Invention As described above, when the working device is not used, the working device can be held on the boom base end member by the holding member in a state where the boom is contracted, so that the boom can be used for hanging work. When an auger device is attached to the end of a boom to perform a digging operation, the working device (for example, a temporary support device) does not hinder these operations.

When using the working device, release the holding by the holding member with the boom contracted, engage the working device with the boom head by the engaging member, and move the working device with the boom head according to the boom expansion and contraction. Can be done. In this case, the working device is attached to the rotating unit, and if the rotating unit is rotated by the rotating cylinder, the working device can also be rotated with this,
Workability is improved. Since the working device is directly attached to the rotating member forming the boom head, the working device can be reduced in size and weight without the need for a rotating arm as in the related art.

[Brief description of the drawings]

FIG. 1 is a side view showing a temporary supporting construction vehicle with a digging column device as an example of a working vehicle to which the present invention is applied. FIG. 2 is a main boom and a temporary supporting device of the temporary supporting construction vehicle. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is a side view showing the vicinity of the boom head of the temporary support construction vehicle, and FIG. FIG. 6 is a schematic view showing each working state of the temporary supporting construction vehicle with the excavating column equipment. 5: Main boom, 7: Boom head 9: Hook, 11: Auger device 12: Temporary support device 17: Temporary support arm device 31, 32: Arm holding member 36: Rail member, 37 ...... Lock pin

Continued on the front page (72) Norihisa Takahashi, No. 1152, Yamashita, Ryoke, Ryoji, Ageo City, Saitama Prefecture Inside the Ageo Plant of Aichi Vehicle Co., Ltd. Aichi Vehicle Co., Ltd. Ageo Factory (72) Inventor Jun Amano, 1152 Yamashita, Ryoke, Oji, Ageo City, Saitama Prefecture 10 Aichi Vehicle Co., Ltd. Ageo Factory No. 10 Inside the Ageo Plant of Aichi Vehicle Co., Ltd. (56) References

Claims (1)

(57) [Scope of request for utility model registration] 1. A boom that can be freely raised and contracted, expanded and contracted, and the like, a boom head provided at a tip of the boom, and a working device attached to the boom head, wherein the boom head is a tip of the boom. A fixed portion fixed to the fixed portion, a rotating portion pivotally connected to the fixed portion and rotatable about an axis perpendicular to the direction in which the boom extends with respect to the fixed portion; A rotating cylinder for rotating a rotating part, a holding member capable of holding the working device is provided on a base end side member of the boom, and an engaging member capable of engaging with the working device is provided on the rotating portion. In the contracted state of the boom, the working device can be held by a holding member and can also be engaged with the engaging member, and the working device can be held by the holding member. A work vehicle having a rotating boom head, wherein the working vehicle is configured to be attached to the base end side member or to the rotating portion by the engaging member.