JPH11193543A - Building method of construction machinery front device, and posture holding device of working device used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote work efficiency in the case a working device corresponding to the contents of work is connected to a boom mounted to a construction machinery main body side. SOLUTION: A dismantlement work sub-assembly 10 is fixed to a posture holding device 21 to hold the basic end side of a joint boom 11 constituting the dismantlement sub-assembly 10 in a posture of a certain height position, and the front end side of a common boom 8 mounted to an upper swing body 2 side is connected to the basic end side of the joint boom 11. By the constitution, the occurrence of oscillation, etc., in the joint boom 11 can be prevented in the case joint work between the joint boom 11 and common boom 8 is carried out, and work efficiency can be promoted in the case the dismantlement work sub-assembly 10 is connected to the common boom 8 on the upper swing body 2 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a front apparatus for construction equipment suitably used for, for example, excavation of earth and sand, demolition of a building, and the like, and a posture holding apparatus for a working apparatus used therefor.

[0002]

2. Description of the Related Art In general, a construction machine such as a hydraulic excavator, which is preferably used for excavation work of earth and sand and demolition work of a building, includes a lower traveling body and a construction machine main body rotatably mounted on the lower traveling body. And a front device provided in the upper swing body.

[0003] The front device includes a boom mounted on the upper swing body so as to be able to move upward and downward, and an arm, a working tool, etc., which is mounted on the distal end side of the boom so as to be able to move upward and downward.
A work implement such as a bucket is used when excavating work such as earth and sand, and a work implement such as a cutter is used when performing dismantling work of a building.

By the way, conventionally, for example, the actual working flat 1-2
As described in Japanese Patent No. 8452 and the like, there is known a hydraulic excavator including a boom that can be divided in a length direction. In this type of excavator having a splittable boom, for example, a working device for excavation work including a joint boom, an arm, and a bucket, and a working device for dismantling work including a joint boom, an arm, and a cutter. A single hydraulic excavator for earth excavation work, building demolition work, etc. by selectively connecting the excavator to the tip of the boom attached to the upper swing body according to the work content Can be.

[0005]

However, in the above-described hydraulic excavator according to the prior art, for example, when diverting from excavation work to demolition work, the work equipment for demolition work is lifted by a crane or the like, and the upper revolving body side is lifted. A method of connecting the working device to the boom by aligning the pin holes provided on the boom and the base end side of the joint boom constituting the working device, and inserting the connecting pin into the pin hole, is adopted. ing.

For this reason, the working device lifted by the crane is likely to shake with respect to the boom on the upper revolving unit side, and it becomes difficult to align the pin hole between the joint boom of the working device and the boom on the upper revolving unit side, and the work is difficult. There is a problem that workability when connecting the device to the boom is poor.

Conventionally, a method of individually loading a connecting boom, an arm, a working tool, and the like on a truck or the like, transporting the connecting boom, an arm, a working tool, and the like to a work site, and assembling the connecting boom, the arm, the working tool, and the like as a working device at the work site. Is adopted,
There is a problem that a large amount of time is required for assembling the working device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a workability in selectively connecting a working device to a tip end of a boom attached to a construction machine main body according to work contents. It is an object of the present invention to provide a method of assembling a front device for a construction machine and a posture holding device of a working device used for the method.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a boom having a base end mounted on a construction machine main body so as to be capable of raising and lowering, and a boom having a base end selected in accordance with a work content. The present invention is applied to a front device for a construction machine constituted by a working device that is connected in a symmetric manner.

The method for assembling a front apparatus for a construction machine according to the first aspect of the present invention includes a posture holding step of holding a base end side of the working device at a position having a substantially constant height position, and a base end of the working device. An alignment step of aligning the distal end side of the boom with respect to the proximal end side of the working device while maintaining the side at a fixed height position, and the aligned distal end side of the boom and the proximal end side of the working device. And a connecting step of connecting

By employing such an assembling method, a state in which the base end side of the working device is held at a constant height position when the working device is connected to the boom tip side of the construction machine body. Therefore, it is possible to perform connection while aligning the distal end side of the boom with the base end side of the working device without using a crane or the like, thereby improving workability when connecting the working device and the boom. .

According to a second aspect of the present invention, there is provided a method for assembling a front apparatus for a construction machine, comprising: a pre-assembly step of assembling a working device including a joint boom in advance as a sub-assembly; A posture holding step of holding the base end side at a fixed height position, and a boom distal end side with respect to the base end side of the joint boom while holding the base end side of the joint boom at a fixed height position And a connecting step of connecting the front end side of the aligned boom and the base end side of the joint boom.

By adopting such an assembling method, the working device including the connecting boom is assembled in advance as a sub-assembly body, and the connecting boom of the working device is connected to the boom on the construction machine main body side. The device can be quickly connected to the boom on the construction machine body side. For this reason, for example, a working device suitable for excavation work, a working device suitable for demolition work, and the like are assembled in advance as a subassembly body, and among these different types of working devices, the one according to the work content can be quickly obtained on the construction machine main body side. To the boom.

According to a third aspect of the present invention, there is provided a posture holding device for a working device used in a front apparatus for construction equipment, wherein a mounting table on which the working device is mounted and a base end side of the working device on the mounting table are substantially fixed. And a fixing means for fixing the working device on the mounting table in order to maintain the posture at the height position.

[0015] With this configuration, the working device mounted on the mounting table is held by the fixing means in a posture in which the base end side thereof has a substantially constant height position. Thereby, the boom on the construction machine main body side can be easily aligned with the base end side of the working device, and workability when connecting the working device and the boom can be improved.

According to a fourth aspect of the present invention, the working device includes a joint boom on the base end side, and the working device including the joint boom assembled as a subassembly is mounted on the mounting table. It is in.

With this configuration, the working device assembled as a sub-assembly including the joint boom is mounted on the mounting table, and the distal end of the boom is connected to the base end of the joint boom. A pre-assembled working device can be easily connected to the boom.

Further, according to a fifth aspect of the present invention, the fixing means constituting the posture holding device comprises: a plurality of columns which are erected on the mounting table and sandwich the working device from the left and right directions; And a tether that is tethered to the mounting table.

With this configuration, the working device is anchored on the mounting table by the anchor between the columns, and the operating device can be securely fixed on the mounting table.

According to a sixth aspect of the present invention, the mounting table constituting the attitude holding device is provided with wheels for supporting the mounting table so that the mounting table can travel.

With this configuration, when the working device is fixed on the mounting table of the posture holding device, the work can be performed while the posture holding device is running.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below by taking a hydraulic excavator equipped with a working device for dismantling work as an example.
This will be described with reference to FIGS. First, FIGS. 1 to 9 show a first embodiment according to the present invention.

In FIG. 1, reference numeral 1 denotes a crawler-type undercarriage,
Reference numeral 2 denotes an upper revolving unit as a construction machine main body which is mounted on the lower traveling unit 1 so as to be revolvable. The upper revolving superstructure 2 is provided on the revolving frame 3, a cab 4 provided on the front left side of the revolving frame 3, and on the revolving frame 3 behind the cab 4, and includes a motor, a hydraulic pump, and the like. And a counterweight 6 mounted on the rear end side of the revolving frame 3 at the rear side of the machine room 5.

Reference numeral 7 denotes a front device provided at the front center of the upper swing body 2. The front device 7 is attached to the front center of the revolving frame 3 so as to be able to move up and down, and is driven by a boom cylinder 9. It comprises a common boom 8 and a dismantling work subassembly 10 as a working device which is exchangeably connected to the distal end side of the common boom 8.

Here, the disassembly subassembly 10
Are mounted on the joint boom 11, and on the distal end side of the joint boom 11 so as to be capable of raising and lowering. An arm 15 driven by the arm 14 and a cutter 17 as a working tool, which is rotatably attached to the distal end side of the arm 15 and driven by a working tool cylinder 16, are provided. By connecting the base end side of the joint boom 11 to the distal end side of the common boom 8 attached to the upper revolving superstructure 2 side of the hydraulic excavator by the connecting pins 18, 18.
Front device 7 including disassembly subassembly 10
Are assembled.

Then, as shown in FIG. 2, for example, the front device 7 extends the boom cylinder 9, the intermediate arm cylinder 12, and the arm cylinder 14, and connects the common boom 8, the joint boom 11, the intermediate arm 13, and the arm 15 to each other. By raising and lowering, an operation of cutting a reinforcing bar of a building by a cutter 17 attached to the distal end side of the arm 15 is performed.

Next, a description will be given of a posture holding device used for connection work between the joint boom 11 of the disassembly work subassembly 10 and the common boom 8 on the upper swing body 2 side with reference to FIGS. 3 and 4. FIG.

In the figure, reference numeral 21 denotes a posture holding device,
The posture holding device 21 is erected upward on the upper surface side of the mounting table 23 in a state in which the mounting table 23 is reinforced by reinforcing beams 24, 24,. , Sandwiching the base end side of the joining boom 11 from the left and right directions 4
Are connected via brackets 26 to two pillars 25, 25,.
Cross beam 27 for supporting the base end side of joint boom 11 from below
(Which are shown only two) are fixed to the four corners of the mounting table 23 and fix the wires 30 described later.

The posture holding device 21 according to the present embodiment is
The posture holding device 2 is configured as described above.
A method for connecting the joint boom 11 of the disassembly subassembly 10 to the common boom 8 on the upper revolving superstructure 2 side using the first subassembly 10 will be described below.

First, as shown in FIG. 5, a disassembly work subassembly 10 including a joint boom 11, an intermediate arm 13, an arm 15, and the like is assembled in advance, and an intermediate arm cylinder 12, an arm, and an arm of the disassembly work subassembly 10 are assembled. The joint boom 11, the intermediate arm 13, the arm 15, and the like are folded into a U-shape with the cylinder 14 and the working tool cylinder 16 reduced (a pre-assembly step).

Then, the folded sub-assembly 10 for dismantling work is fixed on the mounting table 23 of the posture holding device 21 using a crane (not shown) or the like (see FIG. 5). In this case, the folded dismantling subassembly 10 places the base end side of the joint boom 11 on the cross beam 27 and
The cylinder mounting bracket 15A erected on the
In a state where the joint boom 11 and the arm 15 are placed on the receiving plate 22 of No. 3, the joint boom 11 and the arm 15 are supported by the columns 25 so as to be sandwiched from left and right directions. And, for example, the joint boom 1
Wire bracket 29 fixed to 1 by bolts or the like
And a wire bracket 28 provided on the mounting table 23, a wire 30 as a tether is stretched, so that the disassembly work subassembly 10
At this time, the pin hole 11A provided on the base end side of the joint boom 11 is held at a height position at a distance A from the bottom surface of the mounting table 23 (posture holding step).

Next, as shown in FIG. 6 and FIG. 7, the disassembly sub-assembly 10 is loaded on the carrier 32 of the truck 31 together with the posture holding device 21 and transported to the work site. In this case, since the disassembly work subassembly 10 is fixed to the posture holding device 21, it is possible to reliably prevent the disassembly work subassembly 10 from collapsing or the like on the bed 32 of the truck 31, and The stability of the disassembly subassembly 10 can be ensured.

Then, at the dismantling work site, the dismantling work subassembly 10 is lowered together with the attitude holding device 21 from the carrier 32 of the truck 31 to the ground using, for example, a crane. Also in this case, the sub-assembly 10 for dismantling work
Since the posture is held by the posture holding device 21, the unloading operation using a crane or the like can be performed safely. Then, the joint boom 1 of the disassembly sub-assembly 10 that has been lowered to the ground together with the posture holding device 21
1 holds a posture in which the pin hole 11A provided on the base end side is at a height position of a distance A from the ground.

Next, as shown in FIG.
The lower traveling body 1 travels toward the disassembly work subassembly 10 supported by the disassembly work 1, and the leading end side of the common boom 8 attached to the upper swing body 2 approaches the joint boom 11 of the disassembly work subassembly 10. Let it. Then, the base end side of the joint boom 11 is set so that the pin hole 11A is at a distance A from the ground.
The boom cylinder 9 is actuated to slightly raise and lower the common boom 8 while maintaining the same height position. Thus, with respect to the distance A from the ground of the pin hole 11A provided on the joint boom 11, the pin hole 8A provided on the distal end side of the common boom 8 is provided.
And the pin holes 8A, 8A provided on the distal end side of the common boom 8 are aligned with the pin holes 11A, 11A provided on the proximal end side of the joint boom 11 (see FIG. 1). Positioning process).

Then, each pin hole 11 on the joint boom 11 side
After the alignment of the pin A with the pin holes 8A of the common boom 8 is completed, as shown in FIG.
Thus, the base end side of the joint boom 11 and the distal end side of the common boom 8 are connected (a connecting step).

In this case, since the base end side of the joint boom 11 is held at a constant height by the posture holding device 21, the joint boom is lifted by a crane or the like, for example, as in the prior art. Compared with the case where the base end side of the joint boom is connected to the distal end side of the common boom, the joint boom 11 does not shake and
Alignment work between the base end of the common boom 8 and the base end of the
And the connection work can be easily performed.

Next, after the joint boom 11 of the dismantling work subassembly 10 is connected to the distal end side of the common boom 8, the dismantling work subassembly 10 is attached to the posture holding device 21.
Is removed, and the cross beam 27 is removed. And, from the joint boom 11, the wire bracket 29
After removing the common boom 8
Is lifted and the disassembly work subassembly 10 is lifted, and the posture holding device 21 is removed.
By assembling, as shown in FIG. 1, the disassembly work front device 7 in which the disassembly work subassembly 10 is connected to the distal end side of the common boom 8 can be assembled.

Thus, according to the present embodiment, the base end side of the joining boom 11 constituting the disassembling work sub-assembly 10 is held at a fixed height position by using the position holding device 21. Thus, for example, as in the prior art,
The joint boom 11 can be prevented from shaking or the like as compared with the case where the base end side of the joint boom is connected to the distal end side of the common boom while the joint boom is lifted by a crane or the like.

As a result, the base end side of the joint boom 11 and the distal end side of the common boom 8 can be easily connected, and the above-described disassembly work subassembly 10 or an arm, a seam boom, etc. suitable for excavation work. When a sub-assembly for excavation work (not shown) or the like equipped with a pre-assembly is assembled in advance and a sub-assembly of these different types according to the work content is exchanged and connected to the common boom 8 on the upper rotating body 2 side. Workability can be greatly improved.

The sub-assembly 1 for dismantling work
The disassembly sub-assembly 10 is assembled on the truck 31 or the like and transported to the work site in a state where the sub-assembly 10 for disassembly work is fixed to the posture holding device 21. Work can be made unnecessary. Moreover, the posture holding device 2
1, the disassembly work sub-assembly 10 can be securely fixed. Therefore, it is possible to prevent the disassembly work sub-assembly 10 from being collapsed on the carrier 32 of the truck 31 during transport, and to perform the disassembly work during transport. Stability of the subassembly 10 can be secured.

Next, FIGS. 10 and 11 show a posture holding device according to a second embodiment of the present invention.

In the figure, reference numeral 41 denotes a posture holding device,
The posture holding device 41 includes a receiving plate 42, a mounting table 43, a reinforcing beam 44, a support 45, a bracket 46, a horizontal beam 47, a wire bracket 48, and the like, like the posture holding device 21 according to the first embodiment. The mounting table 43
Are provided on the lower surface side of the vehicle, and are configured to be able to travel by these wheels 49.

The posture holding device 41 according to the present embodiment has the above-described configuration, and there is no particular difference in the basic operation from the posture holding device 21 according to the first embodiment.

However, since the posture holding device 41 according to the present embodiment is configured to be able to run by each wheel 49, the disassembly work subassembly 10 fixed to the posture holding device 41 is located on the distal end side of the common boom 8. When connecting
When the work place is narrow and the upper revolving unit 2 cannot be moved, the posture holding device 41 is caused to travel toward the common boom 8 to connect the distal end side of the common boom 8 to the joint boom 11 of the sub-assembly 10 for dismantling work. Work can be done.

When the disassembly work subassembly 10 lifted by, for example, a crane or the like is mounted on the mounting table 43 of the posture holding device 41, the disassembly work subassembly 10 is moved by the posture holding device 41 side. Can be finely adjusted. Therefore, the disassembling work subassembly 10 can be quickly positioned at a stable position with respect to the posture holding device 41.

In the first embodiment described above, after the disassembly work sub-assembly 10 and the posture holding device 21 conveyed to the work site by the truck 31 are lowered to the ground, the disassembly work sub-assembly 10 Joint boom 11
And the common boom 8 on the upper revolving unit 2 side has been described as an example, but the present invention is not limited to this. For example, the disassembly sub-assembly 10 is mounted on the bed 31 of the truck 31 together with the posture holding device 21. The joint boom 11 of the disassembly sub-assembly 10 and the common boom 8 on the upper revolving unit 2 side may be connected in a state of being loaded on the upper part 32.

Further, in the first embodiment described above, the case where the disassembly work subassembly 10 is connected to the distal end side of the common boom 8 as an operation device according to the work content has been described as an example. However, the present invention is not limited to this.
It can also be applied to the case of connecting to the front end side of the. Furthermore, in each of the above-described embodiments, the crawler-type hydraulic excavator has been described as an example of a construction machine. However, the present invention is not limited to this. For example, a wheel-type hydraulic excavator, a hydraulic crane having a joint boom, and the like may be used. It can be applied to other construction machines.

[0048]

As described above in detail, according to the method for assembling the front apparatus for construction equipment according to the first aspect of the present invention, the base end side of the working device is brought into a posture at a constant height position in the posture holding step. While holding the work equipment, the front end of the boom attached to the construction machine body can be connected to the base end of the work device while being aligned. Accordingly, it is possible to prevent the working device from shaking or the like as compared with a case where the working device is connected to the tip end side of the boom while being lifted by a crane or the like. The workability when connecting to the vehicle can be greatly improved.

According to the assembling method according to the second aspect of the present invention, in the pre-assembly step, the working device including the connecting boom is assembled as a sub-assembly in advance, and after transporting the working device to the work site, In the holding step, the connecting boom of the working device and the boom on the construction machine body side can be connected. As a result, for example, a working device suitable for excavation work, a working device suitable for demolition work, and the like are assembled in advance as a sub-assembly body, and among these different types of working devices, ones according to the work content can be quickly obtained on the construction machine body side. To the boom.

Further, according to the posture holding device of the working device used in the front device for construction machines according to the third aspect of the present invention, the work table is mounted on the mounting table, and the working device is fixed on the mounting table. And a fixing means for holding the base end in a posture having a substantially constant height position, and by fixing the working device to the posture holding device, the boom of the construction machine main body side is mounted on the base end of the working device. Can be easily aligned, and workability when connecting the working device and the boom can be improved.

According to the fourth aspect of the present invention, since the working device including the connecting boom assembled as the sub-assembly is mounted on the mounting table, the base of the connecting boom constituting the working device is provided. By simply connecting the end of the boom to the end, the working device according to the work content can be easily connected to the boom. In addition, since the working device is pre-assembled as a sub-assembly, and the working device can be transported to the work site while being fixed to the posture holding device, unnecessary time for assembling the working device at the work site is unnecessary. can do.

Further, according to the fifth aspect of the present invention, the fixing means of the posture holding device includes a plurality of columns which are erected on the mounting table and sandwich the working device from the left and right directions. Since the fixing device is configured with the anchors to be anchored on the mounting table, the working device can be reliably fixed on the mounting table by anchoring the working device on the mounting table between the columns by the anchoring tool. Therefore, when the work apparatus is loaded on a truck or the like and transported to a work site while being fixed to the posture holding apparatus, the stability of the work apparatus can be improved.

According to the sixth aspect of the present invention, the mounting table of the posture holding device is provided with wheels for supporting the mounting table so that the mounting table can travel, so that the working device fixed to the posture holding device has the construction machine body side. When connecting the boom of the construction machine, even if it is difficult to move the construction machine
The working device can be connected to the boom on the construction machine body side by moving the posture holding device toward the construction machine body.
Also, when the working device is mounted on the mounting table of the posture holding device, the position of the working device can be finely adjusted by running the posture holding device, and the working device is mounted on the mounting table. Workability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a dismantling hydraulic excavator to which a method of assembling a front device according to an embodiment of the present invention is applied.

FIG. 2 is a front view showing a state where a front device of the excavator is extended.

FIG. 3 is a front view showing a posture holding device used in the first embodiment.

FIG. 4 is a right side view of FIG. 3 showing the posture holding device.

FIG. 5 is a front view showing a state in which the disassembly work subassembly assembled in the pre-assembly step is fixed to the posture holding device.

FIG. 6 is a front view showing a state where the disassembly sub-assembly is loaded on a truck together with a posture holding device.

FIG. 7 is a right side view of FIG. 6 showing a state in which the disassembly subassembly is mounted on a truck together with a posture holding device.

FIG. 8 is a front view showing a positioning step of positioning the common boom with respect to the joint boom held by the posture holding device.

FIG. 9 is a front view showing a connecting step of connecting the joint boom and the common boom.

FIG. 10 is a front view showing a posture holding device used in a second embodiment of the present invention.

FIG. 11 is a right side view of FIG. 10 showing the posture holding device.

[Explanation of symbols]

 2 Upper revolving superstructure (construction machine main body) 7 Front device 8 Common boom 10 Demolition work subassembly (working device) 11 Joint boom 13 Intermediate arm 15 Arm 17 Cutter (working tool) 21, 41 Posture holding device 23, 43 Mounting table 25 Support (fixing means) 30 Wire (fixing means) 49 Wheel

Claims (6)

[Claims] 1. A construction machine comprising: a boom having a base end mounted on a construction machine main body so as to be capable of raising and lowering; and a working device selectively connected to a tip end of the boom in accordance with work content. A front device, a posture holding step of holding a base end side of the working device at a position having a substantially constant height position, and holding the base end side of the working device at a fixed height position, A construction machine comprising: a positioning step of positioning the distal end side of the boom with respect to a base end side of a working device; and a connecting step of connecting the aligned distal end side of the boom and the base end side of the working device. Method of assembling a front device for a vehicle 2. A boom having a base end attached to the construction machine main body so as to be capable of raising and lowering, and a joint boom provided on the base end side, and selectively connected to the distal end side of the boom via the joint boom in accordance with work contents. A front device for a construction machine comprising a working device to be connected, a pre-assembly step of previously assembling the working device including the joint boom as a sub-assembly, and a joint boom assembled as a sub-assembly. A posture holding step of holding the base end side at a fixed height position; and the boom with respect to the base end side of the joint boom while holding the base end side of the joint boom at a constant height position. A method for assembling a front apparatus for a construction machine, comprising: a positioning step of positioning a front end side of a boom; and a connecting step of connecting a front end side of the aligned boom and a base end side of a joint boom. 3. A construction machine for a construction machine, comprising: a boom having a base end mounted on the construction machine main body so as to be capable of raising and lowering; and a working device selectively connected to a tip end of the boom in accordance with work content. A front device, comprising: a mounting table on which the working device is mounted, and the working device mounted on the mounting table to maintain a base end side of the working device at a substantially constant height position. A posture holding device for a working device used in a front device for construction machinery, comprising: a fixing means for fixing on a table. 4. The work device according to claim 3, wherein the work device includes a joint boom on a base end side, and the work table includes the work device including the joint boom assembled as a sub-assembly body. Of work equipment used for construction equipment front equipment. 5. The fixing device according to claim 1, wherein the fixing means is provided on the mounting table, and includes a plurality of columns that sandwich the working device from left and right directions, and a fixing device that fixes the working device to the mounting table between the respective columns. The posture holding device for a working device used in the front device for construction machines according to claim 3, comprising: 6. A posture holding device for a working device used in a front apparatus for construction equipment according to claim 3, wherein the mounting table is provided with wheels for supporting the mounting table so that the mounting table can travel.