JPH0428054B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a swing bracket with an excavation work arm used for earthwork work, etc., which is attached so as to be vertically driven and swingable. This invention relates to an excavation work vehicle that is installed on a platform so that it can swing left and right and be fixed.

[Conventional technology]

Because this type of excavation work vehicle is fully rotating, the arm can be moved between the two positions of the excavation target location and the earth and sand discharge location by simply changing the direction of the swivel base without moving the machine body. However, conventional excavation work vehicles simply have a long excavation work arm connected to a swivel base so that it can swing up and down. For example, when digging a ditch along the wall 21 of a building, etc., as shown in Figure 7, the vehicle body is placed so that it can run along the wall 21, and when turning Unit 04
swivel the swing bracket 02 to the wall surface 21.
Move the swing bracket 02 to the side and place it on the swivel base 04.
While the excavation work arm 01 is in a state parallel to and close to the wall surface 21 by horizontally swinging against the wall surface 21,
In the case of work in which grooves 05 are formed on the wall surface 21, loading the earth and sand excavated by the arm 01 onto the truck 22, etc.
Cases tended to occur where it became impossible due to contact with 1.

[Problem that the invention seeks to solve]

The simplest way to eliminate the above-mentioned inconvenience is to shorten the length of the excavation work arm 01, but this has the fatal flaw of not being able to dig deep enough during excavation work. be.

In addition, in FIG. 7, the swing bracket 02 is further swung to open the excavation work arm 0.
It is also conceivable to fold the arm 01 further into the swivel base 04 side than the illustrated state and operate it so as to avoid contact with the wall of the building. In addition to the raising and lowering operations and the turning operation of the swivel table 04, the excavation work arm 01 is laterally swung toward the swivel table 04 side, and in a direction away from the swivel table 04 and closer to the truck 22; Swinging in the opposite direction causes troublesome operation and loss of swinging time.

An object of the present invention is to provide an excavation arm that is long enough to dig deep enough, while also preventing unnecessary movement and operation of the excavation arm when working in narrow spaces such as digging side ditches next to walls. To avoid this problem, it is possible to efficiently turn a turning table with a small turning radius.

[Means for solving problems]

The technical means of the present invention taken to achieve the above object is to attach a swing bracket to which an arm for excavation work is attached so that it can be driven vertically and swing freely, and to be able to swing left and right and fix it to a fully swingable swivel base that is equipped with an operating section. In the excavation work vehicle installed in An arm swing range changing means that can freely switch between two states is provided so that the upper limit of one's heave-and-swing range is higher than the other upper limit of the other's heave-and-swing range. , the arm is located at the upper limit of the other up-and-down swing range and is outside the rotation locus of the rear end of the swivel base in plan view; and the arm is located at the upper limit of the one up-and-down swing range. and the posture of the arm is configured to be switchable so as to be located within the rotation locus of the rear end of the swivel base in plan view.As a result of taking such technical measures, the following is achieved. It worked and was effective.

[Effect]

(i) The range of up-and-down swing of the arm for excavation work is divided into a range that is appropriate for excavation work and, separately, a swing range where the arm falls within the rotation trajectory of the rear end of the swivel table when viewed from above. Since it is configured to be switchable,
Even if an excavation arm with an appropriate length is used for excavation work, the turning radius of the entire device on the swivel table will be a small percentage of the rotation trajectory of the rear end of the swivel table, regardless of the length of the arm. Can be limited to radius.

(ii) Since the excavation work arm is connected to the swivel table from the front of the operating section and from the outside to the side, even if the excavation work arm is long, the operation The working arm can be moved up a large distance without difficulty while avoiding positional interference with the excavating work arm. It is easy to set the length to be long enough to allow deep digging.

〔Effect of the invention〕

Due to the effects of (i) and (ii) above, the excavation work arm installed on the swivel table has a length that allows deep digging, and the swivel table can be rotated with a small turning radius.

Therefore, in addition to the operation of swinging the excavation work arm up and down, the swivel table can be rotated in a narrow space without requiring additional operations such as swinging the excavation work arm in the left and right directions. Easy to work efficiently.

〔Example〕

Next, embodiments of the present invention will be described based on illustrative drawings.

As shown in FIG. 1, a crawler type traveling device 7 equipped with a dozer device 6 is attached to a swivel base 4 so as to be able to drive and rotate freely around the vertical axis P, and a driver section 3 with a cabin and a driving section are attached to the swivel base 4. 8, and
A swing bracket 2, which can swing and be fixed freely around the vertical axis P1, is installed at the front end of the swivel base ₄ and on one side of the driving unit 3, and a fluid pressure cylinder C is attached to the swing bracket 2. ₁ to _C3 are attached with an arm 1 for excavation work that can swing up and down and bend freely, and constitute a work vehicle for performing excavation work such as side ditch digging and earth removal work.

As shown in FIGS. 2 and 3, the swing bracket 2 is attached with a pin 9 so as to be swingable left and right, and the member 5A to which the base end side of the swing cylinder 11 is attached is attached to the swivel base 4 at its front edge. Insert pin 1 into bracket 12, which is located a little further back than
A _pair of left and right fluid pressure cylinders 14, 14 are installed across the mounting member 5A and the swivel base 4, and the cylinders 14, 14 An arm swinging range changing means 5 is configured that allows the entire excavation work arm 1 to be changed in its front and back position with respect to the swivel base 4 by vertically swinging and fixing the mounting member 5A.

In other words, as shown in Fig. 5A, if the swing bracket 2 remains extended forward, even if the arm 1 is lifted to the upper limit of the up-and-down swing range, the swivel base 4 cannot be turned around the vertical axis _P1 . , when the arm 1 hits a wall or the like because the turning radius a is large, the mounting member 5A of the swing bracket 2 is swung to swing the arm 1 backward and upward, as shown in FIG. As a result, as shown in FIG. 6, when digging ditches near the wall 21, the arm 1 can be rotated without coming into contact with the wall 21. Excavated earth and sand can be loaded onto the truck 22 located at the rear.

Furthermore, when the driving unit 3 is provided on the swivel base 4,
As shown in FIG. 4, the rollers 50 attached to the drive unit 3 are placed on rails 17, 17 provided on the swivel base 4 in the front-rear direction, and the drive unit 3 and the swivel base 4
A hydraulic cylinder 18 is installed across the area, and the driving part 3 can be moved forward and backward along the rails 17, 17. During excavation work, the driving part 3 can be positioned forward to improve the visibility of the work and also to allow for turning. The driving part 3 is placed at the rear when storing or transporting, making the machine compact. Furthermore, the driving part is equipped with a pin 31 that can be selectively inserted into a plurality of pin insertion holes 30 arranged in parallel on the swivel base 4. 3 so that it can be inserted into and removed from the inside of the drive unit 3, so that sliding movement of the drive unit 3 can be reliably locked.

[Another example]

If there is a risk of the arm 1 swinging backwards colliding with the driving unit 3 due to the left and right swinging, a stopper may be provided to act on the arm 1,
Alternatively, the cylinder 18 that slides the driving section 3 and the cylinder 14 that slides the arm 1 can be operated in conjunction with each other, so that when the arm 1 swings toward the driving section 3, the driving section 3 slides to the rear. , and when the arm 1 swings away from the driving part 3, the driving part 3
It may also be configured so that it slides forward to avoid a collision.

The present invention can be applied to various types of excavation work vehicles such as face shovel work vehicles.

Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention,
Fig. 1 is an overall side view of the excavation work vehicle, Fig. 2 is an overall plan view, Fig. 3 is a perspective view of the main parts, Fig. 4 is a sectional view showing the operating cabin, and Figs. 5 and 6 are operational views. It is an explanatory diagram. FIG. 7 is an explanatory diagram of the operation in the conventional structure. DESCRIPTION OF SYMBOLS 1...Arm for excavation work, 2...Swing bracket, 3...Driving section, 4...Swivel base, 5...Arm swing range changing means, 5A...Mounting member, 14
...Fluid pressure cylinder, P ₂ ...Horizontal axis.

Claims (1)

[Scope of Claims] 1. Excavation work in which a swing bracket 2 to which an arm 1 for excavation work is attached so that it can be driven vertically and swing freely is installed on a swivel platform 4 that is fully swingable and equipped with a driving section 3 so that it can swing left and right and be fixed. It is a vehicle, and the mounting position of the excavation work arm 1 with respect to the swivel base 4 is determined by the driver 3.
The arm 1 is set to the lateral side away from the front of the arm 1, and the upper limit of one range of the arm 1 is set higher than the upper limit of the other range of the arm 1. , an arm swinging range changing means 5 that can be freely switched between two states is provided, and as the range of up-and-down swings is changed, the arm 1 is positioned at the upper limit of the other range of up-and-down swings and rotates in plan view. stand 4
A state in which the rear end portion is located outside the rotation trajectory, and a state in which the rear end portion is located at the upper limit of the up-and-down swing range of the one and located within the rotation trajectory of the rear end portion of the swivel base 4 in plan view. , an excavation work vehicle configured such that the posture of the arm 1 can be changed. 2 The arm swing range changing means 5 moves the mounting member 5A of the swing bracket 2 to the swivel base 4.
2. The excavating vehicle according to claim 1, wherein the excavating vehicle is configured to be swingably and fixedly mounted around a horizontal axis _P2 rearward of the leading edge of the excavating vehicle by means of a hydraulic cylinder 14.