JPH0427911Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Industrial Application Field The present invention relates to a working device for a prefabricated duct installation vehicle that installs prefabricated ducts.

(2) Conventional technology As shown in Fig. 4, in the conventional prefabricated duct installation work, a worker 32 enters a trench 31 excavated by an excavating vehicle such as a truck hoe 30, and a crane vehicle 33 etc. A worker 32 guides and installs the lifted prefabricated duct 34,
It was fixed by hand.

(3) Problems that the invention aims to solve However, the conventional prefabricated duct installation work
A worker entered the excavated trench and manually installed the prefabricated duct, which had been lifted up by a crane truck or the like, which resulted in a problem that the efficiency of the prefabricated duct installation work was poor.

(4) Means for solving the problem In order to solve the above problem, the present invention has a bracket that is rotatably attached in a horizontal plane to the boom tip of a prefabricated duct installation vehicle, and a bracket that is perpendicular to the bracket. A rail that is pivotably supported in a plane, a frame that is slidably attached along this rail, and a prefab that is attached to this frame so that it can rotate about a horizontal axis that is parallel to the rail. The apparatus is equipped with a duct gripping device.

(5) Action With the above configuration, the boom moves, the bracket rotates, the rail swings, the frame slides forward, and the gripping device rotates, the prefabricated duct is gripped by the gripping device, and the boom is moved again. , rotate the bracket, swing the rail, and rotate the gripping device to fix the prefabricated duct in accordance with the installation position, and then release the gripping by the gripping device and slide the frame backward, Release the gripping device from the prefabricated duct.

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

As shown in FIG. 3, 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 telescopic boom 4 is extended and contracted by a built-in telescopic device (not shown), and is also raised and lowered by a luffing cylinder 5. At the tip of the telescopic boom 4, a proximal end of a flexible boom 6, which can be freely bent and extended downward, is pivotally supported. , the bending and extending boom 6 is bent and extended by a bending and extending cylinder 7, and a working device 8 is pivotally supported at the tip of the bending and extending boom 6.
is maintained in equilibrium by a balancing cylinder 9.

1 and 2 show a working device 8, in which a support shaft 10 is swingably attached to the tip of a bending boom 6, and this support shaft 10 is held in a balanced state by a balancing cylinder 9. A bracket 11 is rotatably attached to the bracket 11, and the bracket 11 is attached to a worm wheel 14 provided around the support shaft 10.
A worm 13 is attached to the bracket 11 so as to mesh with the worm wheel 14, and a hydraulic motor 1 is provided to drive the worm 13.
It rotates around the support shaft 10 by a drive device consisting of 2 and 2. A rail 15 is pivotally supported on the bracket 11 so as to be able to freely swing within a vertical plane. The frame 17 is attached so as to be slidable in the front and back direction along the rail 15, and the frame 17 is slid by a sliding cylinder 18 in which a rod and a tube are attached to the rail 15 and the frame 17. A horizontal shaft 28 parallel to the rail 15 is rotatably attached to the frame 17, and the horizontal shaft 28 is provided within the frame 17. A worm wheel 22 is provided around the horizontal shaft 28.
The horizontal axis 28 is rotated by a drive device consisting of a worm 21 built into the frame 17 to mesh with the worm wheel 22, and a hydraulic motor 20 built into the frame 17 to drive the worm 21. A gripping device 19 is attached to the tip of the horizontal shaft 28 so as to rotate as the horizontal shaft 28 rotates. The gripping device 19 includes a support piece 26 attached to a horizontal shaft 28 , an arm 23 whose base end is swingably supported on the support piece 26 , a cylinder 24 for swinging the arm 23 , and a cylinder 24 for swinging the arm 23 . It consists of a grip plate 27 rotatably and swingably supported at the tip, and a fork 25 that is inserted into a hole 29a of the prefabricated duct 29 attached at right angles to the support piece 26 and lifts the prefabricated duct 29.

With the above configuration, when installing a prefabricated duct, the turntable 3, telescoping boom 4, and bending boom 6 are moved, and the bracket 1 is moved.
The rail 15 is swung so that the hole 29a of the prefabricated duct 29 to be laid is opposed to the gripping device 19, and the rail 15 is swung and the gripping device 19 is rotated so that the hole 29a and the fork 25 are aligned in a straight line. , slide the frame 17 forward along the rail 15, insert the fork 25 into the hole 29a of the prefabricated duct 29, and swing the arm 23 of the gripping device 19 to place the gripping plate 27 on the top surface of the prefab duct 29. The prefabricated duct 29 is held in contact with the holding device 19. Next, the turntable 3, telescoping boom 4, and bending boom 6 are moved again to transport the prefabricated duct 29 to the installation site as shown in FIG. The prefabricated duct 29 is positioned and fixed at the installation position by rotation.
Thereafter, the prefabricated duct 29 is installed by swinging the arm 23, sliding the frame 17 backward along the rail 15, and removing the fork 25 from the hole 29a.

(7) Effects of the invention As described above, according to the invention, a prefabricated duct can be laid using a prefabricated duct installation vehicle without the need for workers to enter the groove, and the direction of the prefabricated duct can be kept constant. There is provided a working device for a prefabricated duct installation vehicle that can reliably grip a prefabricated duct with the working device even if the work device is not installed, and the present invention is effective in improving the efficiency of prefabricated duct installation work.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially sectional side view showing the working device, Fig. 2 is a view taken in the direction of the arrow in Fig. 1, and Fig. 3 shows the working state of the prefabricated duct laying work vehicle. The side view and FIG. 4 are explanatory views showing the conventional prefabricated duct installation work. 8... Working device, 11... Bracket, 15...
...Rail, 17...Frame, 19...Gripping device.

Claims (1)

[Scope of utility model registration request] A bracket is attached to the boom tip of a prefabricated duct installation vehicle so that it can rotate freely in a horizontal plane, a rail is pivotally supported to the bracket so that it can swing freely in a vertical plane, and a bracket is attached to be able to slide freely along this rail. 1. A working device for a prefabricated duct installation work vehicle, comprising: a prefabricated duct frame; and a prefabricated duct gripping device rotatably attached to the frame about a horizontal axis parallel to a rail.