JPS5820679Y2 - Grooving machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drum type trench excavator, and in particular improves the shape of the excavating body and the shape of the metal fittings for its mounting, thereby making it possible to cut soil in the circumferential direction of the drum and cut remaining roots. The purpose is to reduce excavation resistance and traction resistance, improve work efficiency, and improve the durability of workers by performing excavation work in advance and subsequently.

As a drum-type groove excavator, there is one in which a large number of bits are provided on the outer periphery of a drum, as disclosed in, for example, Japanese Patent Application Laid-Open No. 5021505.

Although this conventional example is useful when targeting rock with high hardness or frozen soil, it uses an expensive rod-shaped bit, which not only increases the cost but also makes it difficult to scrape up the excavated surface. There is a problem that it cannot be done.

In addition, as disclosed in Japanese Utility Model Application Publication No. 49-51004 as a chain-type ditch excavator instead of a drum-type trencher, for example, as disclosed in Japanese Utility Model Application Publication No. 49-51004, the claws attached to the chain band are installed in a part opposite to the operating direction of the chain band. Some have a U-shaped earth lifting case.

However, although this conventional example can scrape up the excavated surface, the claw pieces and the soil lifting case have multiple shapes and are attached to the chain band as one piece, so the attachment strength is insufficient. There are problems such as not being able to exchange each other individually.

Therefore, the present invention solves the problems of the conventional example, and first, the first excavation body along the circumferential direction of the drum is used to form so-called sushi in the hard soil in advance, and to cut the remaining roots in the soil in advance. Then, the second excavation body performs a lifting action, thereby making it possible to carry out trench digging work with less resistance and efficiency. Therefore, in the present invention, in a trench excavator equipped with an excavating body on the outer periphery of a rotating drum, the part along the drum axis direction and the part along the drum circumferential direction are integrated. When mounting the excavation body in a continuous manner, the metal fittings are fixed upright on the outer periphery of the rotating drum, and the first excavation body of the excavation body is attached to the drum of the metal fitting from the first excavation body and the second excavation body. The second excavating body is detachably fixed to a portion of the metal fitting along the drum axis direction, and the first excavating body is detachably attached to a portion of the metal fitting along the drum axis direction. The drum has a plate shape extending along the circumferential direction of the drum and is located on the rotation leading side with respect to the second excavating body, and a radial blade portion is formed on the drum rotation leading side,
The second excavating body has a plate shape along the drum axis direction, and extends outward in the drum radial direction with an extending end edge located radially inward from the extending end of the first excavating body. It is characterized by

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

In FIGS. 1 and 2, 1 is a traveling working vehicle having a hydraulic lifting device 2 shown as a tractor, 3 is a trench excavator, and a connecting device 4 shown as a 3-point link to the traveling working vehicle 1 is used for lifting and lowering. freely connected.

The trench excavator 3 is connected to a machine frame 5, a central transmission case 6, a drum 8 rotating around a horizontal shaft 7 via a transmission body inside the transmission case 6, a tilling cover 9, and the like.

The power from the PTO shaft can be transmitted to the transmission body of the transmission case 6 via the universal joint shaft 10, and the drums 8 are provided on both sides of the transmission case 6, and substantially rotate around the inclined horizontal axis. The drum 8 is driven to rotate in the direction indicated by F.
A large number of excavation bodies 11 are attached to the outer periphery of the excavation body 11 .

Note that the tilling cover 9 is tilted upwardly so that the tilling cover 9 has a raised part 12.
It is preferable to have a wide opening.

Referring to Figures 3 and below, reference numeral 13 indicates metal fittings for mounting the excavation body, which are welded or bolted at equal positions on the outer periphery of the drum 8.
It is provided by means such as nuts.

As shown in FIG. 3, the metal fitting 13 is a so-called letter-shaped plate material in which a portion 13B extending parallel to the drum axis direction in this example and a portion 13A extending parallel to the drum circumferential direction in this example are integrally connected. However, for example, as shown in FIG. 3, the portion 13A along the circumferential direction of the drum may be a so-called U-shaped plate material in which the pairs thereof are parallel to each other.

For mounting the excavation body, each part 13A, 13B of the metal fitting 13 is used as an excavation body support part, and the first excavation body 14A and the second excavation body 14B are each fastened with a fastener 15A such as a bolt or nut.

15B, they are individually and removably fixed.

The first excavation body 14A and the second excavation body 14B are both plate-shaped and made of plate material, and the first excavation body 14A is detachably fixed to the portion 13A.

The first excavating body 14A has a plate shape extending outward in the drum radial direction and along the circumferential direction of the drum, and has a radial blade portion 16A on the rotation leading side with respect to the second excavating body 14B as shown in FIG.
is formed.

The second excavation body 14B has a plate shape along the drum axis direction,
It is detachably fixed to the portion 13B, extends outward in the drum radial direction, and has an extended end edge 16B along the drum axis direction located radially inward from the extended end of the first excavation body 14A. In this example, the extended end edge 16B side is gently curved in the direction opposite to the rotation direction.

Thus, in FIG. 4, A is the tip rotation trajectory of the first excavation body 14A, and B is the tip rotation trajectory of the second excavation body 14B.

The operation of the embodiment configured as above will be explained.

The trench excavator 3 connected to the traveling work vehicle 1 is towed, and its drum 8 rotates in the direction of arrow F, thereby digging soil with the excavator 11 and releasing it rearward and laterally using the cover 9 as a guide surface. The excavated soil is discharged through the section 12.

The excavation body 11 is separated from the first excavation body 14A and the second excavation body 14B, since the first excavation body 14A is on the rotation leading side with respect to the second excavation body 14B, and the rotation trajectory A is also large. , a deep cut is made, but at this time, since the blade part 16A is a so-called straight blade that is long or extended in the radial direction of the drum, it first penetrates the soil by cutting streaks into the soil, removing residual roots, etc. The extended end edge 16 of the second excavated body 14B that extends or is long in the drum axial direction.
The soil with streaks added by B is excavated, raked up, and discharged to the dumping section 12.

Therefore, excavation by the second excavation body 14B is the original work, but in advance of this, the first excavation body 14A cuts the remaining roots and other buried objects in the soil, and cuts down the hard soil. Based on this practice, trench digging work by the second excavator 14B can be carried out smoothly and accurately with less impact and less traction resistance.

Moreover, since the excavating bodies 11 are arranged in rows in the drum circumferential direction and the drum axial direction, they perform almost the same function in the cases of FIGS. 3 1 and 2, but in the case of FIG. 3 2, the second excavating body 14B
Preliminary cuts are made on both sides by the pair of first excavators 14A, resulting in a more favorable working situation.

In addition, when mounting the excavation body, the metal fitting 13 has a shape in which a portion 13A along the circumferential direction of the drum and a portion 13B along the drum axis direction are integrally connected, so that the portions 13A and 13B are reinforced with each other. Here, the so-called stiffness of the metal fitting 13 becomes strong, and the installation of the excavated body 11 becomes easier.

Furthermore, the first and second excavating bodies 14A and 14B of the excavating body 11 are plate-shaped and can be attached and detached individually, so that when one becomes worn out, it can be replaced without being restricted by the other.

In the present invention, the mounting of the excavating body which is fixed upright on the outer circumference of the drum has a shape in which the metal fitting 13 is integrally connected with a portion 13B along the drum axis direction and a portion 13A along the drum circumferential direction. 13 to the rotating drum 8, and by having the parts 13A and 13B along the axial direction and the circumferential direction of the drum, they reinforce each other's joints, and the parts 13A and 13B are attached by impact force or the like. (fixed part) is less likely to be damaged.

In addition, both the first excavation body 14A and the second excavation body 14B are plate-shaped, and are easy to manufacture.
4A is fixed to the portion 13A along the circumferential direction of the drum,
In addition, since it is located on the rotation leading side of the second excavating body 14B, the unexcavated portion can be excavated with little resistance depending on the plate thickness, and subsequent excavation by the second excavating body 14B is facilitated. I can do it.

The second excavating body 14B is fixed to the portion 13B in the form of a plate along the drum axis direction, and its extended edge 16B is located radially inward than that of the first excavating body 14A. Because it is located on the rear side, it can perform the functions of raking and excavating soil without excessive resistance.

Since the first and second excavating bodies 14A and 14B are individually attached to and detached from the metal fitting 13, there is an advantage that only the required side can be attached and detached when replacing or repairing.

Although a towed type trench excavator is shown in the embodiment, a self-propelled trench excavator may also be used.

[Brief explanation of the drawing]

Figure 1 is the overall side view, Figure 2 is the back view, Figure 3 1.2
4 is a side view of FIG. 3 1, and FIG. 5 is an explanatory diagram of the working situation. 8...Drum, 11...Excavation body, 13
......For installation, use metal fittings, 14A...1st excavation body, 14B...2nd excavation body, 16A...
・Blade part.

Claims (1)

[Scope of utility model registration request] In a trench excavator 1 equipped with an excavating body 11 on the outer periphery of a rotating drum 8, the metal fitting 13 is attached to the excavating body in a shape in which a portion 13B along the drum axis direction and a portion 13A along the circumferential direction of the drum are integrally connected. The first excavation body 14A of the excavation body 11, which is fixed upright on the outer circumference of the metal fitting 13 and consists of a first excavation body 14A and a second excavation body 14B, is attached to a portion 13A of the metal fitting 13 along the circumferential direction of the drum. The second excavating body 14B is removably fixed to a portion 13B of the metal fitting 13 along the drum axis direction, and the first excavating body 14A extends outward in the drum radial direction. The second excavating body 14B has a plate shape along the drum circumferential direction and is located on the rotation leading side with respect to the second excavating body 14B, and a radial blade portion 16A is formed on the drum rotation leading side. It is characterized by having a plate shape along the drum axis direction and extending outward in the drum radial direction with an extending end edge 16B positioned radially inward from the extending end of the first excavating body 14A. trench digging machine.