JP2004190388A - Twin header - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twin header facilitating the execution of a ditch excavation up to the width of an outside diameter of also an excavated surface by an excavation drum in the twin header and, at the same time, carrying out efficient excavation/agitation work by reducing parts where excavation or agitation can not be executed. <P>SOLUTION: The twin header extending a casing 3 to the front end side of a mounting flange 2 put on a bracket provided to an arm section of a working vehicle and, at the same time, providing a pair of rotary drums 4 and 4 through a driving shaft in both right and left of the front end section of the casing 3, the mounting flange 2 put on the mounting surface of the bracket is formed in an approximately circular shape, and the center of the mounting surface is rotated at a predetermined angle with the shaft vertically passing through as the center to alter an attachable angle to enable the mounting flange to attach. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a twin header used for excavation, soil agitation, and the like, which is mounted on a bracket provided on an arm portion of a work vehicle.
[0002]
[Prior art]
In civil engineering work, when performing excavation or soil agitation, twin headers attached to the arm of a work vehicle, which work by inserting into the ground while rotating a pair of rotating drums provided with excavating teeth and stirring punches at high speed, are often used. ing. However, in digging work, when digging a narrow groove, in order to dig below the width including both ends of the digging surface of the left and right digging drums, the rotation of the twin-header rotating drum in the length direction of the groove is necessary. It is necessary to excavate along the axis of the shaft with the diameter of the outer periphery of the excavation surface of the rotary drum.
[0003]
In this case, conventionally, the mounting surface of the bracket provided on the arm portion of the work vehicle and the mounting surface of the mounting flange of the twin header are each rectangular, and the twin header is centered on an axis perpendicular to the center of these mounting surfaces. Was rotated to change the mounting angle and could not be mounted. Therefore, for example, the arm was extended to the side of the work vehicle by rotating the turning device on the upper part of the vehicle, and excavation was performed while moving a predetermined width along the groove. This was not easy at sites where it was difficult to secure a scaffold for work vehicles due to the small size. In such a case, after excavating the length of the twin header in the longitudinal direction, the twin header is once pulled up from the ground, the work vehicle is advanced by the length of the twin header, and then the twin header is inserted into the ground again. It took time and effort to repeat.
[0004]
Furthermore, in a narrow site where the installation position of the work vehicle is limited, the ground is often cut around the turning of the turning device at the top of the vehicle and the bending and extension of the arm, but the twin header is attached to the axis of the arm. In many cases, it is easy to work if it can be mounted at a right angle by, for example, turning it 45 degrees and tilting it.
[0005]
Furthermore, since the twin header is cut by rotating a cylindrical rotary drum, on the cutting surface perpendicular to the axis of the arm, as shown in FIG. The uncuttable portion 35 along the curved surface (cut surface) remained. On the other hand, even in the mixing and stirring operation, the stirring range of the tip of the stirring punch 14 radially implanted on the outer peripheral surface of the rotary drum 4 is cylindrical, and the unstirable portion 37 as shown in FIG. It was difficult to perform a proper mixing and stirring operation.
[0006]
On the other hand, in Japanese Patent Application Laid-Open No. 10-68124, a stirrer is provided with a turning motor for horizontally turning the stirrer, and the rotation shaft of the stirrer is rotated at 90 degrees as needed to eliminate the unstirable portion, thereby achieving efficient stirring. Is proposed.
However, this stirrer requires a swing motor and a gear mechanism, has a complicated structure, increases the manufacturing cost, and easily causes a functional trouble when ground resistance is large and a large torque is required. Further, it does not have a rigid structure capable of coping with excavation work in which a large impact is applied to the mounting portion.
[0007]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention is directed to solving the above-described problems, and allows a mounting angle of a mounting flange to be mounted on a bracket portion of a work vehicle in a twin header to be changed as necessary. It is an object of the present invention to facilitate excavation of a groove up to the outer diameter width of a surface, and to enable efficient excavation and agitation work by reducing an unexcavable portion or an agitation portion.
[0008]
[Means for Solving the Problems]
Therefore, according to the present invention, a casing is extended at a tip end side of a mounting flange to be attached to a bracket provided on an arm portion of a work vehicle, and a pair of rotating drums are provided via a drive shaft at right and left ends of the casing. In the twin header provided, the mounting flange to be mounted on the mounting surface of the bracket is substantially circular, and is rotated at a predetermined angle about an axis that vertically passes through the center of the mounting surface, and is mounted at a mounting angle. Was changed to a twin header that can be mounted.
[0009]
Thereby, the mounting angle of the rotary drum with respect to the mounting surface of the bracket in the arm portion of the work vehicle is appropriately changed as necessary, and it is possible to easily cope with the narrow groove excavation up to the outer diameter width of the excavation surface by the rotary drum. At the same time, the excavation / agitation operation can be performed efficiently by reducing the unexcavable portion or the unagitation portion.
[0010]
Further, the bracket can be mounted on the mounting surface of the mounting flange by using a predetermined bolt at a different angle by rotating the mounting flange at an angle of at least 45 degrees or less about an axis vertically passing through the center thereof. If a plurality of bolt holes are provided, a twin header is provided by tilting the rotation axis to the axis of the arm of the work vehicle, so that the arm is extended obliquely to the traveling direction and the excavation or The stirring operation can proceed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 shows a preferred embodiment of the present invention, in which a twin header 1A has a mounting flange 2 mounted on a bracket provided on an arm portion of a work vehicle (not shown) on an upper portion thereof, and a lower surface of the mounting flange 2. It comprises a narrow, substantially rectangular parallelepiped casing 3 extending downward, and rotating drums 4, 4 removably attached to a drive shaft (not shown) projecting from the lower part of the casing 3 to the left and right. A plurality of excavating picks 13 are radially exchangeably implanted on the surfaces of the rotating drums 4 and 4, respectively. The outer surface (excavating surface) connecting the extremities is indicated by a chain line.
[0013]
FIG. 2 shows a plan view of the twin header 1A of FIG. 1, in which the mounting surface of the mounting flange 2 is substantially circular, and as shown in FIG. They are arranged at equal intervals at degrees. Since the mounting flange 2 is disk-shaped and the bolt holes 12 are arranged in a circle as described above, the mounting flange 2 is rotated around an axis passing vertically through the center of the mounting surface of the mounting flange 2 so as to be mounted on the mounting surface of a bracket (not shown). The mounting angle can be adjusted in units of 45 degrees while matching the bolt holes provided, and the twin header 1A can be fixed to the bracket with predetermined bolts.
[0014]
As shown in FIG. 3, when excavating a trench using, for example, the twin header 1 </ b> A, the arm 21 is usually set so that the rotation axes of the rotating drums 4 and 4 are perpendicular to the axis of the arm 21 and horizontal to the ground surface. It is mounted on the provided bracket 20 to perform a trench excavation work in front of the construction vehicle. In this case, the groove 30 having a width equal to or more than the width X at both ends of the excavation surface formed by the left and right excavation drums 4 and 4 is often excavated. The work was not easy when trying to excavate a ditch.
[0015]
In other words, if there is a large site, there is a method of turning the turning device on the upper part of the work vehicle to extend the arm from the side of the work vehicle and moving the vehicle along the groove, but excavation work is performed on the side of the work vehicle. However, this method is not stable, and this method is difficult especially when the scaffold space is narrow on the left and right of the trench to be excavated.
[0016]
Therefore, as shown in FIG. 4, if the mounting angle of the twin header 1 </ b> A to the bracket 20 provided on the work vehicle is turned by 90 degrees around the center of the mounting surface of the bracket 20 and fixed by the bolt 15, excavation is performed. It is possible to easily excavate a narrow groove 31 up to the outer peripheral width Y of the excavation surface connecting the tips of the plurality of excavation picks 13 on the drum 4.
[0017]
Also, as shown in FIG. 9, if the shaft of the rotation axis of the twin header 1A is inclined with respect to the horizontal plane of the ground to cover a desired depth and the trench is excavated, the twin header 1A is inserted many times into the ground. It is possible to dig a groove having a predetermined width simply by moving the work vehicle forward without the trouble of pulling out or pulling out.
[0018]
Furthermore, as shown in the plan view of FIG. 10, if the mounting angle of the twin header 1A with respect to the bracket of the twin header 1A is inclined at 45 degrees, the excavation is performed while extending the arm at an angle of about 45 degrees in front of the work vehicle 100. If the work is performed, even at a point where the scaffold 40 of the work vehicle 100 cannot be sufficiently taken, the narrow groove 32 is provided at a predetermined position by the slantly extended arm and the twin header 1 provided to be inclined to the arm axis. Can be extended to
[0019]
FIG. 5 shows a situation where the twin header 1A of the present invention is used to excavate the corner of the bottom of the excavation surface in the front direction as viewed from the working vehicle of the excavation unit 32 in the ground. Since the excavation surface of the excavation unit 32 formed by the rotation of the plurality of excavation picks 13 provided is a curved surface formed by the outer peripheral surface connecting the tips of the plurality of excavation picks 13, the wavy line shown in the figure also appears on the ground to be excavated. Unexcavated portion 35 remains inside.
[0020]
On the other hand, as in another preferred embodiment of the present invention shown in FIG. 6, in the case of the twin header 1B in which the excavation pick 13 of the rotary drums 4 and 4 is replaced with a stirring punch 14 for mixing and stirring work, the At the corner of the mixing and stirring unit 36, a mixing and stirring impossible portion 37 that the tip of the stirring punch 14 does not reach remains.
[0021]
Therefore, in the excavation work, as shown in FIG. 7, if the mounting flange for mounting the twin header 1A on the bracket provided on the arm portion of the work vehicle is rotated by 90 degrees and mounted, the arm of the work vehicle in the excavation section 32 can be mounted. Can be excavated at 90 degrees at the bottom of the plane perpendicular to the plane.
[0022]
Also, as shown in FIG. 8, in the mixing and stirring operation, if the twin header 1B is rotated by 90 degrees in the same manner as in 1A and attached to the bracket 20, the operation is performed without leaving the mixing and stirring impossible portion as in the excavation operation. be able to.
Therefore, it is not necessary to separately perform the work on the corner unworkable portion at the bottom of the surface perpendicular to the arm of the work vehicle in the excavation work and the mixing and stirring work, so that each work can be efficiently performed.
[0023]
Although the best mode for carrying out the present invention has been sufficiently described in the above description, the present invention is not limited to this. For example, the drive method of the twin header is not limited to the chain drive method using a hydraulic motor as shown in the figure. If the mounting portion can be mounted at a different angle by rotating the mounting portion by a predetermined angle, a gear drive type or hydraulic direct drive The method may be used.
[0024]
【The invention's effect】
As described above, according to the twin header of the present invention, the mounting flange of the twin header to be mounted on the bracket provided on the work vehicle has a substantially circular shape, and the mounting angle can be changed as necessary. Drilling work with a drum as narrow as the outer diameter of the digging surface has become easier to carry out. In addition, the excavation / agitation operation can be performed efficiently by reducing the excavation-impossible portion or the churning-impossible portion.
[Brief description of the drawings]
FIG. 1 is a front view showing a preferred embodiment of the present invention.
FIG. 2 is a plan view of the twin header of FIG. 1;
FIG. 3 is a front view showing a state in which the work arm with the twin header of FIG. 1 is used for trench excavation work.
FIG. 4 is a front view showing a state in which the twin header is rotated by 90 degrees and used for trench excavation work in the work arm of FIG. 3;
FIG. 5 is a side view showing a state in which the work arm equipped with the twin header of FIG. 3 is used for excavation work.
FIG. 6 is a side view showing a state in which a work arm with a twin header according to another preferred embodiment of the present invention is used for mixing and stirring work.
FIG. 7 is a side view showing a state in which a work arm mounted with changing the mounting angle of the twin header of FIG. 4 is used for excavation work.
FIG. 8 is a side view showing a state in which the work arm of FIG. 6 mounted with the mounting angle of the twin header changed is used for the mixing and stirring work.
FIG. 9 is a side view showing a state in which a trench excavation operation is being performed using a work arm mounted with the axis of the rotation shaft of the twin header of FIG. 4 inclined to the ground surface.
FIG. 10 is a plan view showing a state in which a trench excavation operation is being performed using the operation arm to which the twin header according to the present invention is attached.
[Explanation of symbols]
Reference Signs List 1 twin header, 2 mounting flange, 3 casing, 4 rotating drum, 12 bolt hole, 13 excavation pick, 14 stirring punch, 15 bolt, 20 bracket, 21 arm, 30, 31 groove, 32 excavation part, 35 non-excavation part, 36 Mixing / stirring unit, 37 Unable to mix and stir, 40 Scaffold, 100 Work vehicle

Claims (2)

A twin header in which a casing is extended at a tip end side of a mounting flange mounted on a bracket provided on an arm portion of the work vehicle, and a pair of rotary drums are provided via a drive shaft at left and right end portions of the casing. In the above, the mounting flange mounted on the mounting surface of the bracket is substantially circular, and can be mounted by changing the mounting angle by rotating at a predetermined angle about an axis vertically passing through the center of the mounting surface. Twin header. On the mounting surface of the mounting flange, a plurality of bolts can be mounted on the bracket by using predetermined bolts at different angles by rotating the mounting flange at an angle of at least 45 degrees or less about an axis vertically passing through the center thereof, The twin header according to claim 1, wherein a bolt hole is provided.

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