JPH0444544Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to a prefabricated duct gripping device for a prefabricated duct installation vehicle that grips a prefabricated duct.

(2) Conventional technology As shown in Fig. 3, in the conventional prefabricated duct installation work, a worker 22 enters a trench 21 excavated by an excavating vehicle such as a truck hoe 19, and a crane vehicle 20 etc. The worker 22 guides and installs the lifted prefabricated duct 23,
It was fixed by hand.

(3) Problems that the invention aims to solve However, in the conventional prefabricated duct installation work, a worker enters the excavated trench and manually lifts the prefabricated duct by a crane truck, etc. Since the prefabricated ducts were laid by the ducts, it was difficult to align the prefabricated ducts, and there was a problem that the efficiency of the prefabricated duct installation work was poor.

(4) Means for solving the problems In order to solve the above problems, the present invention has a frame that is attached to the boom tip of a prefabricated duct installation vehicle, and a base end that is swingably attached to the frame. A pivotally supported arm, a gripping plate pivotally supported at the tip of this arm so as to be able to freely swing around one horizontal axis, a swinging cylinder whose both ends are pivotally supported between the arm and the frame, and a swinging cylinder that projects vertically from the frame. The fork is attached to the fork and is inserted into the hole of the prefabricated duct to lift up the prefabricated duct, and the nut runner is attached to the frame below the fork so as to protrude in the vertical direction and tightens a connecting bolt that connects and fixes the prefabricated duct.

(5) Effect With the above configuration, when gripping a prefabricated duct, the boom is moved, the fork attached to the frame is inserted into the hole of the prefabricated duct to be gripped, and the swing cylinder is extended to swing the arm. By doing so, the prefabricated duct is gripped by the gripping plate. After that, the prefabricated duct is moved to the installation position and installed, and the connecting bolts are tightened and fixed using the nut runner.

(6) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the prefabricated duct installation work vehicle has a turntable 3 rotatably provided on a vehicle body 1 supported by outriggers 2, and the base end of a telescoping boom 4 is pivotally supported on this turntable 3. The telescoping boom 4 is extended and contracted by a built-in telescoping device (not shown), and is also raised and lowered by a luffing cylinder 5. At the tip of the telescoping boom 4, a proximal end of a bending boom 6, which can be bent and extended downward, is pivotally supported. The bending/extending boom 6 is bent and extended by a bending/extending cylinder 7. A prefabricated duct gripping device 8 for gripping a prefabricated duct is pivotally supported at the tip of the bending/extending boom 6, and the prefabricated duct gripping device 8 is held in a balanced state by a balancing cylinder 9. .

FIG. 1 shows a prefabricated duct gripping device 8, in which a frame 10 is swingably supported at the tip of a bending boom 6, this frame 10 is held in a balanced state by a balancing cylinder 9, and an arm 11 is attached to the frame 10. The base end of the arm 1 is pivotably supported, and this arm 1
Both ends of a swing cylinder 12 are pivotally supported on the tip of the arm 1 and the frame 10, and a grip plate 13 is pivoted on the tip of the arm 1 by a horizontal shaft so as to be swingable around the axis of the horizontal shaft. One end of a fork 14 that is inserted into the hole 17 of the prefabricated duct 16 and lifts up the prefabricated duct 16 is attached to the frame 10 at a right angle below the frame 10, and the prefabricated duct 16 is connected below the fork 14 attached to the frame 10. A nut runner 15 is mounted perpendicularly to the frame 10 for tightening a connecting bolt 18 to be fixed.

With the above configuration, when the prefabricated duct is gripped and laid, the turntable 3, the telescopic boom 4, and the bendable boom 6 are moved, and the frame 10 of the prefabricated duct gripping device 8 is moved as shown in FIG.
Insert the fork 14 attached to the prefabricated duct 16 into the hole 17 of the prefabricated duct 16, extend the swing cylinder 12, swing the arm 11, and move the prefab duct 1.
The prefabricated duct 16 is gripped by bringing the gripping plate 13 into contact with the upper surface of the prefabricated duct 6 . In this state, the turntable 3, telescoping boom 4, and bending boom 6
As shown in FIG. 2, the prefabricated duct 16 is moved to the position where it will be laid and installed, and the nut runner 15 tightens the connecting bolt 18 to fix the prefabricated duct 16 to the previously laid prefabricated duct. Thereafter, the swing cylinder 12 is contracted to swing the arm 11, and the grip plate 13 is separated from the upper surface of the prefabricated duct 16.
6, move the telescopic boom 4 and the bending boom 6, and move the fork 14 into the prefabricated duct 16.
The prefabricated duct 16 is installed by pulling it out through the hole 17 of the prefabricated duct 16.

(7) Effects of the invention As described above, according to the invention, the prefabricated duct can be reliably gripped and laid by the prefabricated duct installation vehicle without a worker entering the groove, and the prefabricated duct can be laid. A prefabricated duct gripping device for a prefabricated duct installation vehicle is provided that is effective in improving installation work efficiency.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a prefabricated duct gripping device, Fig. 2 is a side view showing the working state of a prefabricated duct installation work vehicle, and Fig. 3 shows a conventional prefabricated duct installation work. FIG. 8... Prefabricated duct gripping device, 10... Frame, 11... Arm, 12... Rocking cylinder,
13... Gripping plate, 14... Fork, 16... Prefabricated duct, 17... Hole.

Claims (1)

[Scope of utility model registration request] A frame attached to the boom end of a prefabricated duct installation vehicle, an arm whose base end is swingably supported on the frame, and an arm that is swingably supported at the end of the arm around a horizontal axis. a gripping plate, a swinging cylinder whose both ends are pivoted to an arm and a frame, a fork attached to the frame to protrude vertically and inserted into a hole in a prefabricated duct to lift up the prefabricated duct, and a fork attached to the frame below the fork. A prefabricated duct gripping device for a prefabricated duct installation vehicle, comprising: a nut runner for tightening a connecting bolt that is attached in a vertically protruding manner and connects and fixes the prefabricated duct.