JPH0131678Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe burying machine that propels a pipe burying hole.

This type of excavator uses a Katsutaf Ace equipped at the tip of the machine that pushes it into the soil while rotating.The earth and sand excavated by the Katsutaf Ace is brought into the machine and turned into slurry by the water supplied to this part. It is designed to be discharged outside.

In the case of such an excavator, as described above, the excavated soil is turned into a slurry and discharged, so even if soil mixed with gravel is excavated, it cannot be discharged outside the machine.

For this reason, as shown in Japanese Patent Publication No. 55-47199, conventional excavators of this type are equipped with a gravel crushing device between the Katsutaface and the discharge port, which allows gravel to be taken in from the Katsutaface. It is used to crush gravel.

However, since the conventional gravel crushing device described above was composed of a horizontal cylinder with a conical interior and a spiral blade located within the cylinder, it became large in the axial direction, and an excavator equipped with this gravel crushing device was was increasing in the axial direction. If this excavator is large in the axial direction, there is a problem in that the movement resistance increases when attempting to change the direction of excavation by swinging the part in which the gravel crushing device is installed.

The present invention was developed in consideration of the above-mentioned problems, and it is possible to reduce the axial size of the gravel crushing device installed in the excavator, and therefore to reduce the axial size of the entire excavator. The purpose is to provide excavators for industrial use.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 is a tubular excavator main body, and 2 is a swinging part coaxially and swingably supported within this main body 1. Reference numeral 3 denotes a rotating shaft supported by this swinging part and connected to a drive part such as a hydraulic motor provided at the base of the swinging part. It's fixed. A cutter ace 5 is engaged with the tip of the sleeve 4 so as to be able to rotate integrally with the sleeve 4. A first cutter 6 and a second cutter 7 are provided on the rear side of the cutter face 5, spaced apart in the axial direction, and keyed to the sleeve 4 so as to be rotatable together with the sleeve 4. A lattice plate 8 is interposed between the cutters 6 and 7 and rotatably supported on the sleeve 4. The lattice plate 8 is fixed to a stabilizer 9 fitted to the tip of the excavator main body 1 so as to be able to swing freely around the swing fulcrum of the swing section 2. The grid plate 8 has holes 1 through which gravel passes in the axial direction.
A large number of cutters 0 are provided, and first and second cutters 6 and 7 rotate on both surfaces of the grid plate 8. A slurrying chamber 11 is provided behind the second cutter 7 and inside the front end of the excavator body 1, and a nozzle 12 for injecting pressure water into this chamber 11 is connected to a pressure water supply source at the rear. A slurry discharge port 13 communicating with a rear slurry processing device is opened.

In the above configuration, when the rotary shaft 3 is rotated while pressing the cutter ace 5 into the soil via the excavator main body 1, earth and sand mixed with gravel is taken in from the intake port of the cutter ace 5. This taken in earth and sand is sent rearward through the holes 10 of the lattice plate 8 while being stirred by the first cutter 6. And the gravel is this grid plate 8
When passing through the hole 10, or when caught in this hole 10, it is crushed by the first cutter 6 on the upstream side and by the second cutter 7 on the downstream side, and is left in a finely divided state. The slurry enters the slurry forming chamber 11, where it is mixed with pressure water to form a slurry, and is discharged rearward from the slurry discharge port 13.

In addition, when taking in the earth and sand, the stabilizer 9 does not rotate because it is pressed into the soil, and the lattice plate 8, which is firmly fixed, is sufficiently fixed.
It does not rotate together with the cutters 6 and 7. The direction of excavation is adjusted by swinging the swinging section 2 to change the direction of the stabilizer 9.

The pipe burying machine according to the present invention is as described in detail above, and is supported by the machine body 1 and has a rotary shaft 3.
A cutlet ace 5 is provided at the tip of the cutlet ace 5, and by rotating the cutter ace 5 while pushing it into the soil, earth and sand are taken into the inner side of the cutter ace 5, and this is mixed with water and discharged backward from the discharge port 13 as a slurry. , and more Katsutav Ace 2
5 and a rotary shaft 3, the cutter face 5 has a hole 10 between the discharge port 13 and a hole 10 through which gravel passes in the axial direction.
A lattice plate 8 is provided with a large number of lattice plates 8 fixed to a stabilizer 9 that rotatably supports the cutter ace 5; Since the gravel crushing device consisting of the second cutters 6 and 7 is provided, the size of the gravel crushing device is reduced in the axial direction. The overall size in the axial direction can be reduced, and the resistance to movement when attempting to change the digging direction by swinging the tip of the excavator is reduced, thereby improving steering performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 1. FIG. 2 is a sectional view taken along the - line in FIG. 1; 1 is the excavator main body, 3 is the rotating shaft, 5 is the cutlet ace, and 13 is the discharge port.

Claims (1)

[Scope of utility model registration request] A Katutafu Ace 5 is supported by the excavator body 1 and provided at the tip of a rotating shaft 3. By rotating this Katutafu Ace 5 while holding it down in the soil, earth and sand are taken into the inside of the Katutafu Ace 5, and this is mixed with water to form a slurry. In this pipe-laying excavation machine, the cutter ace 5 and the discharge port 13 are discharged rearward from the outlet 13, and the tip portion including the cutter ace 5 and the rotating shaft 3 is swingable.
A lattice plate 8 is provided with a large number of holes 10 through which gravel passes in the axial direction, and is fixed to a stabilizer 9 that rotatably supports the Katsutaface 5.
and a gravel crushing device comprising first and second cutters 6 and 7 fixed to the rotating shaft 3 on both sides of the lattice plate 8 in the axial direction. digging machine.